{"id":1550,"date":"2017-03-09T12:32:31","date_gmt":"2017-03-09T05:32:31","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1550"},"modified":"2023-11-23T12:25:30","modified_gmt":"2023-11-23T05:25:30","slug":"vietnam-journal-of-forest-science-special-issue-number-2017","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2017\/03\/vietnam-journal-of-forest-science-special-issue-number-2017\/","title":{"rendered":"Vietnam Journal of Forest Science Special issue Number 2017"},"content":{"rendered":"

\"Bia<\/a><\/p>\n

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T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P – CHUY\u00caN SAN 2017<\/b><\/p>\n

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<\/td>\nK\u1ef7 ni\u1ec7m 40 n\u0103m th\u00e0nh l\u1eadp Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/td>\nTS. Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t<\/td>\n<\/td>\n1<\/td>\n<\/tr>\n
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1.<\/p>\n

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Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng Tr\u00f4m (Sterculia foetida <\/i>L.) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom v\u00e0 gh\u00e9p c\u00e0nh<\/td>\nPh\u00f9ng V\u0103n Khang Ph\u00f9ng V\u0103n Khen<\/td>\nStudy propagation of Sterculia foetida <\/i>L. by cutting and grafting method<\/td>\n2<\/td>\n<\/tr>\n
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2.<\/p>\n

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Nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt vi nh\u00e2n gi\u1ed1ng Lan kim tuy\u1ebfn (Anoectochilus <\/i>sp.)<\/td>\nNguy\u1ec5n Th\u1ecb L\u1ec7 H\u00e0 Ph\u1ea1m Th\u1ecb M\u1eadn Cao Minh Th\u1ee7y Nguy\u00ean Ph\u1ea1m Th\u1ee5y Nh\u1eadt Truy\u1ec1n Nguy\u1ec5n Xu\u00e2n C\u01b0\u1eddng Nguy\u1ec5n V\u0103n Thi\u1ebft<\/td>\nMicropropagation of Anoechtochillus <\/i>sp. by tissue culture technique<\/td>\n8<\/td>\n<\/tr>\n
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3.<\/p>\n

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K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u1ecdn v\u00e0 nh\u00e2n gi\u1ed1ng G\u00e1o tr\u1eafng [Neolamarckia cadamba <\/i>(Roxb.) bosser] ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng kinh t\u1ebf<\/td>\nNguy\u1ec5n V\u0103n Chi\u1ebfn<\/td>\nResearch results on seclection and propagation of Neolamarckia cadamba <\/i>(Roxb.) bosser for economic plantation<\/td>\n16<\/td>\n<\/tr>\n
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4.<\/p>\n

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Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m h\u1ea1t gi\u1ed1ng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n h\u1ea1t C\u00f3c h\u00e0nh (Azadirachta exselsa <\/i>(Jack) Jacob) \u1edf Ninh Thu\u1eadn<\/td>\nPh\u00f9ng V\u0103n Khen<\/td>\nStudy on characterization of Azadirachta exselsa <\/i>seeds and storage method in Ninh Thuan<\/td>\n27<\/td>\n<\/tr>\n
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5.<\/p>\n

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K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u gi\u00e2m hom Chi\u00eau li\u00eau n\u01b0\u1edbc (Terminalia calamansanai <\/i>Rolfe)<\/td>\nNguy\u1ec5n Thanh Minh \u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e0<\/td>\nPropagation results of Terminalia calamansanai <\/i>Rolfe by cutting<\/td>\n34<\/td>\n<\/tr>\n
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6.<\/p>\n

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Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng c\u1ee7a v\u01b0\u1eddn gi\u1ed1ng tr\u00e0m \u1edf Th\u1ea1nh Ho\u00e1, Long An<\/td>\nNguy\u1ec5n V\u0103n Thi\u1ebft \u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i Phan Th\u1ecb M\u1ef5 Lan<\/td>\nMelaleuca seed orchards in Long An: Growth and potential for tree improvement<\/td>\n40<\/td>\n<\/tr>\n
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7.<\/p>\n

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K\u1ebft qu\u1ea3 s\u01b0u t\u1eadp tr\u1ed3ng b\u1ed5 sung lo\u00e0i cho v\u01b0\u1eddn s\u01b0u t\u1eadp th\u1ef1c v\u1eadt Tr\u1ea3ng Bom giai \u0111o\u1ea1n 2010 – 2015<\/td>\nTr\u1ea7n V\u0103n S\u00e2m<\/td>\nThe results of collecting and additional planting some native species in Trang Bom arboretum in period 2010 – 2015<\/p>\n

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46<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
8.<\/p>\n

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X\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n g\u00e2y ch\u1ebft r\u1eebng Phi lao (Casuarian equisetifolia <\/i>J.R et G. Fors) ven bi\u1ec3n t\u1ea1i x\u00e3 \u0110\u00f4ng H\u1ea3i, huy\u1ec7n Duy\u00ean H\u1ea3i, t\u1ec9nh Tr\u00e0 Vinh<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i L\u00ea Thanh Quang Nguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u V\u0169 V\u0103n \u0110\u1ecbnh \u0110\u1eb7ng Nh\u01b0 Qu\u1ef3nh Ng\u00f4 V\u0103n B\u00ecnh<\/td>\nThe causes which induce dead of Casuarian equisetifolia <\/i>J.R et G. Fors in coastal area of Dong Hai commune, duyen hai district of Tra Vinh<\/td>\n52<\/td>\n<\/tr>\n
9.<\/p>\n

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Nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt kinh doanh r\u1eebng tr\u00e0m ch\u1ed3i sau khai th\u00e1c tr\u1eafng \u1edf huy\u1ec7n Th\u1ea1nh Ho\u00e1, t\u1ec9nh Long An<\/td>\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t Ph\u1ea1m Minh To\u1ea1<\/td>\nStudy of Melaleuca coppice plantation after clear cutting in Thanh Hoa district, Long An province<\/td>\n60<\/td>\n<\/tr>\n
10<\/p>\n

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\u1ea2nh h\u01b0\u1edfng th\u1ec3 n\u1ec1n \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n tr\u1ed3ng t\u1ea1i c\u00e1c \u0111\u1ea3o v\u00f9ng bi\u1ec3n ph\u00eda Nam, Vi\u1ec7t Nam<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i<\/td>\nEffect of Site Properties to growth and survival rate of mangrove species PlantED in South Islands of Vietnam<\/td>\n68<\/td>\n<\/tr>\n
11<\/p>\n

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Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m l\u1eadp \u0111\u1ecba v\u00e0 ph\u00e2n chia l\u1eadp \u0111\u1ecba tr\u1ed3ng r\u1eebng ng\u1eadp m\u1eb7n t\u1ea1i c\u00e1c \u0111\u1ea3o v\u00f9ng bi\u1ec3n ph\u00eda Nam Vi\u1ec7t Nam<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i<\/td>\nSite properties and zoning for afforestation of mangrove forests in the several coastal islands in the South of Vietnam<\/td>\n78<\/td>\n<\/tr>\n
12<\/td>\nNghi\u00ean c\u1ee9u g\u00e2y tr\u1ed3ng m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba ph\u00f2ng ch\u1ed1ng s\u1ea1t l\u1edf ven s\u00f4ng r\u1ea1ch \u1edf huy\u1ec7n Nh\u00e0 B\u00e8, th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh<\/td>\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t V\u00f5 Trung Ki\u00ean<\/td>\nStudy of planting some native species to prevent erosionofg riverside in Nha Be district, Ho Chi Minh city<\/td>\n92<\/td>\n<\/tr>\n
13<\/p>\n

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\u1ea2nh h\u01b0\u1edfng c\u1ee7a t\u1ec9a th\u01b0a v\u00e0 ph\u00e2n b\u00f3n t\u1edbi sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng keo lai cung c\u1ea5p g\u1ed7 t\u1ea1i khu v\u1ef1c \u0110\u00f4ng Nam B\u1ed9<\/td>\nPh\u1ea1m V\u0103n B\u1ed1n<\/td>\nEffects of thinning and fertilizer on growth, productivity of Acacia hybrid plantation for saw – log wood in Southeastern region<\/td>\n105<\/td>\n<\/tr>\n
14<\/p>\n

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K\u1ebft qu\u1ea3 tr\u1ed3ng r\u1eebng L\u00f2 bo (Brownlowia tabularis <\/i>Pierre) cung c\u1ea5p g\u1ed7 l\u1edbn \u1edf \u0110\u00f4ng Nam B\u1ed9<\/td>\nTr\u1ea7n H\u1eefu Bi\u1ec3n L\u00ea Xu\u00e2n Tr\u01b0\u1eddng<\/td>\nThe results of some sivilcutural tecniques for Brownlowia tabularis <\/i>Pierre plantation in Vietnam Southeastern<\/td>\n116<\/td>\n<\/tr>\n
15<\/p>\n

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Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng s\u1ea5u t\u00eda (Sandoricum indicum <\/i>Cav) nh\u1eb1m cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i v\u00f9ng \u0111\u00f4ng nam b\u1ed9<\/td>\nNguy\u1ec5n Ki\u00ean C\u01b0\u1eddng \u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e0 Ki\u1ec1u Ph\u01b0\u01a1ng Anh<\/td>\nSilvicultural characteristics and planting techniques of Sandoricum indicum <\/i>Cav for sawlog production in Southeastern Vietnam<\/td>\n123<\/td>\n<\/tr>\n
16<\/p>\n

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K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng B\u1eddi l\u1eddi v\u00e0ng (Litsea pierrei <\/i>Lecomte) t\u1ea1i v\u00f9ng \u0110\u00f4ng Nam B\u1ed9<\/td>\nNguy\u1ec5n Anh Tu\u1ea5n Nguy\u1ec5n Ho\u00e0ng Ti\u1ec7p<\/td>\nThe study of plantation technique for Litsea pierrei <\/i>Lecomte in Southeastern of Vietnam<\/td>\n132<\/td>\n<\/tr>\n
17<\/td>\nTh\u1ef1c tr\u1ea1ng v\u00e0 gi\u1ea3i ph\u00e1p ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng r\u1eebng ph\u00f2ng h\u1ed9 ven bi\u1ec3n t\u1ec9nh B\u1ea1c Li\u00eau<\/td>\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t L\u00ea Thanh Quang Nguy\u1ec5n B\u1eafc V\u01b0\u01a1ng Ph\u1ea1m Minh To\u1ea1i<\/td>\nStatus and solution for sustainable development of the coastal protection forests in bac lieu province<\/td>\n140<\/td>\n<\/tr>\n
18<\/p>\n

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\u1ee8ng d\u1ee5ng GIS \u0111\u1ec3 d\u1ef1 b\u00e1o nhanh sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1 (Pinus kesiya <\/i>royle ex gordon) v\u00f9ng nguy\u00ean li\u1ec7u gi\u1ea5y T\u00e2n Mai t\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/td>\nPh\u00f9ng V\u0103n Khen Ph\u1ea1m Tr\u1ecbnh H\u00f9ng<\/td>\nApplication gis for rapid prediction in grwoth of Pinus kesiya <\/i>royle ex gordon plantations in Tan Mai paper mill area, Lam Dong province<\/td>\n152<\/td>\n<\/tr>\n
19<\/p>\n

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Ph\u00e2n t\u00edch kh\u1ea3 n\u0103ng c\u1ea1nh tranh kinh t\u1ebf c\u1ee7a r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m \u00e1p d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt \u1edf v\u00f9ng \u0110\u00f4ng Nam B\u1ed9<\/td>\nTr\u1ea7n Thanh Cao Ph\u1ea1m Th\u1ebf D\u0169ng Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t V\u0169 \u0110\u00ecnh H\u01b0\u1edfng<\/td>\nNalyzing economic competitive advantage of Acacia auriculiformis <\/i>plantations applied advanced techniques in south eastern region<\/td>\n167<\/td>\n<\/tr>\n
20<\/p>\n

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N\u0103ng su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 kinh t\u1ebf r\u1eebng tr\u1ed3ng keo lai t\u1ea1i v\u00f9ng \u0111\u1ea5t ng\u1eadp l\u1ee3 chua ph\u00e8n t\u1ec9nh C\u00e0 Mau<\/td>\nNg\u00f4 V\u0103n Ng\u1ecdc V\u00f5 Ng\u01b0\u01a1n Th\u1ea3o<\/td>\nProductivity and economic efficiency planting of Acacia hybrid on acid sulphate soil at Ca Mau province<\/td>\n178<\/td>\n<\/tr>\n
21<\/p>\n

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Gi\u1edbi thi\u1ec7u ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt, c\u00f4ng ngh\u1ec7 m\u1edbi<\/p>\n

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\nNGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG TR\u00d4M (Sterculia foetida <\/i>L.) B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P GI\u00c2M HOM V\u00c0 GH\u00c9P C\u00c0NH<\/b><\/p>\n

Ph\u00f9ng V\u0103n Khang, Ph\u00f9ng V\u0103n Khen <\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n<\/div>\n

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T\u00d3M T\u1eaeT <\/b><\/p>\n

Tr\u00f4m l\u00e0 lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c tr\u1ed3ng v\u1edbi m\u1ee5c \u0111\u00edch l\u1ea5y m\u1ee7, v\u00ec v\u1eady vi\u1ec7c nh\u00e2n gi\u1ed1ng Tr\u00f4m b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p v\u00f4 t\u00ednh c\u00f3 \u00fd ngh\u0129a h\u1ebft s\u1ee9c quan tr\u1ecdng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng Tr\u00f4m b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom cho c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t khi s\u1eed d\u1ee5ng ch\u1ea5t k\u00edch th\u00edch IBA, NAA v\u00e0 IAA \u1edf c\u00e1c n\u1ed3ng \u0111\u1ed9 kh\u00e1c nhau, t\u1ef7 l\u1ec7 hom ra r\u1ec5 cao nh\u1ea5t v\u1edbi ch\u1ea5t k\u00edch th\u00edch NAA \u1edf n\u1ed3ng \u0111\u1ed9 1500ppm. \u1ea2nh h\u01b0\u1edfng c\u1ee7a tu\u1ed5i c\u00e2y m\u1eb9 l\u1ea5y hom t\u1edbi kh\u1ea3 n\u0103ng ra r\u1ec5 l\u00e0 r\u1ea5t l\u1edbn, t\u1ef7 l\u1ec7 hom ra r\u1ec5 \u0111\u1ea1t cao nh\u1ea5t \u1edf tu\u1ed5i 1 t\u1ef7 l\u1ec7 83,3% v\u00e0 gi\u1ea3m m\u1ea1nh \u1edf c\u00e1c tu\u1ed5i ti\u1ebfp theo. V\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u00f9a v\u1ee5 gi\u00e2m hom cho th\u1ea5y t\u1ef7 l\u1ec7 hom ra r\u1ec5 cao nh\u1ea5t v\u00e0o th\u00e1ng 11 (36,7%) khi c\u00e2y m\u1eb9 l\u1ea5y hom c\u00f3 nhi\u1ec1u ch\u1ed3i non, t\u1ef7 l\u1ec7 n\u00e0y c\u0169ng gi\u1ea3m m\u1ea1nh v\u00e0 th\u1ea5p nh\u1ea5t \u1edf nh\u1eefng th\u00e1ng m\u00f9a kh\u00f4. \u0110\u1ed1i v\u1edbi nh\u00e2n gi\u1ed1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p c\u00e0nh th\u00ec t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y gh\u00e9p cao nh\u1ea5t l\u00e0 \u1edf nghi\u1ec7m th\u1ee9c gh\u00e9p n\u00eam (84,5%). Th\u1eddi \u0111i\u1ec3m gh\u00e9p t\u1ed1t nh\u1ea5t l\u00e0 v\u00e0o m\u00f9a kh\u00f4. C\u00e2y con sau gh\u00e9p ch\u1ec9 b\u1eaft \u0111\u1ea7u sinh tr\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao sau 1 th\u00e1ng gh\u00e9p.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Nh\u00e2n gi\u1ed1ng, c\u00e2y Tr\u00f4m<\/p>\n

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Study propagation of Sterculia foetida L. by cutting and grafting method <\/b><\/p>\n

Sterculia foetida <\/i>L., known as Trom, has been widely planted for purpose of collecting resin in the central coast of Vietnam. The study aimed at testing the effects of various concentrations of IBA, NAA, IAA, the age of mother trees and the cutting season on rooting percentage. The results showed that NAA with a concentration of 1,500 ppm produced the highest rooting percentage. Moreover, the age of mother trees providing cuttings had tremendous effects on rooting percentage in which the highest rooting percentage was seen at one – year – old mother trees, accounting for 83.3%. In terms of cutting season, the result represented that the highest rooting ratio of cuttings was in November – the rainy season which reached 36.7%, as mother trees have a lot of shoots and the rooting percentage went down rapidly during dry season. On the other hand, for grafting method, the study showed that the highest survival percentage was in wedge grafting, peaked at 84.5%. The suitable time to apply this method is during dry season. Seedlings after being grafted starts developing height one month later. Results from this study can be potentially used research in the future.<\/p>\n

Keywords: <\/i><\/b>Propagation, Sterculia foetida <\/i>L.<\/p>\n

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NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT VI NH\u00c2N GI\u1ed0NG LAN KIM TUY\u1ebeN (Anoectochilus <\/i>sp.<\/i>)<\/b><\/p>\n

Nguy\u1ec5n Th\u1ecb L\u1ec7 H\u00e01, Ph\u1ea1m Th\u1ecb M\u1eadn1, Cao Minh Th\u1ee7y Nguy\u00ean1, Ph\u1ea1m Th\u1ee5y Nh\u1eadt Truy\u1ec1n1, Nguy\u1ec5n Xu\u00e2n C\u01b0\u1eddng2, Nguy\u1ec5n V\u0103n Thi\u1ebft2<\/b><\/p>\n

\u00a0<\/b>1Trung t\u00e2m \u1ee8ng d\u1ee5ng Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Nam B\u1ed9 2Vi\u1ec7n NCKH L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c lo\u1ea1i v\u00e0 n\u1ed3ng \u0111\u1ed9 h\u00f3a ch\u1ea5t v\u00e0 ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng t\u1edbi kh\u1eed tr\u00f9ng m\u1eabu, nh\u00e2n ch\u1ed3i, k\u00e9o d\u00e0i ch\u1ed3i v\u00e0 ra r\u1ec5 cho 3 lo\u00e0i Lan kim tuy\u1ebfn cho th\u1ea5y: m\u1eabu ch\u1ed3i \u0111\u01b0\u1ee3c kh\u1eed tr\u00f9ng \u0111\u1ea1t k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t \u1edf n\u1ed3ng \u0111\u1ed9 Javel 30% trong th\u1eddi gian 20 ph\u00fat cho t\u1ef7 l\u1ec7 m\u1eabu s\u1ed1ng s\u1ea1ch l\u00e0 50%. M\u1eabu c\u1ea5y sau \u0111\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n sang m\u00f4i tr\u01b0\u1eddng MS c\u00f3 b\u1ed5 sung BA \u0111\u1ec3 c\u1ea3m \u1ee9ng t\u1ea1o ch\u1ed3i. T\u1ef7 l\u1ec7 nh\u00e2n ch\u1ed3i cao nh\u1ea5t tr\u00ean m\u00f4i tr\u01b0\u1eddng MS c\u00f3 b\u1ed5 sung 1 mg\/l BA v\u1edbi s\u1ed1 ch\u1ed3i v\u00e0 chi\u1ec1u cao ch\u1ed3i t\u01b0\u01a1ng \u1ee9ng l\u00e0 23,9 ch\u1ed3i\/m\u1eabu, 1,1 cm\/ch\u1ed3i. M\u00f4i tr\u01b0\u1eddng MS c\u00f3 b\u1ed5 sung 0,3 mg\/l BA v\u00e0 0,3 mg\/l NAA cho k\u1ebft qu\u1ea3 v\u01b0\u01a1n ch\u1ed3i t\u1ed1t nh\u1ea5t v\u1edbi chi\u1ec1u cao trung b\u00ecnh ch\u1ed3i l\u00e0 3,9 cm\/ch\u1ed3i. Ch\u1ed3i \u0111\u01b0\u1ee3c ra r\u1ec5 trong m\u00f4i tr\u01b0\u1eddng MS c\u00f3 b\u1ed5 sung 1 mg\/l IBA chi\u1ec1u d\u00e0i trung b\u00ecnh l\u00e0 4,4 r\u1ec5\/c\u00e2y v\u00e0 2,8 cm\/ch\u1ed3i.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Vi nh\u00e2n, Lan kim tuy\u1ebfn, BA, NAA, s\u1ef1 n\u1ea3y m\u1ea7m<\/td>\n<\/tr>\n

Micropropagation of Anoechtochillus sp. by tissue culture technique <\/b><\/p>\n

The effects of different types and concentrations of mechanical and hormones on shoot sterilization, shoot multiplication, shoot elongation and rooting were studied in tissue culture of Anoectochilus formosanus, Anoectochilus roxburgii <\/i>and Anoectochilus setaceus. <\/i>Our results showed that the process was started with explant sterilization using commercial Javel solution (NaClO) at 30% and soaked segments of axillary shoots in 20 minutes, with 50% of shoot proliferation. The explants were then transferred to MS medium with adding different concentrations of growth regulation substances BA. The highest shoot multiplication were obtained on MS medium containing BA (1 mg\/l) with maximum 23.9 shoots per explant and 1.1 cm per shoot. The best shoot elongation response was observed on MS supplemented with 0.3 mg\/l BA and 0.3 mg\/l NAA with 3.9 cm per shoot in height. Elongated shoots when maintained on MS medium supplemented with 1 mg\/l NAA produced optimal rooting with 4.4 roots per shoot and 2.8cm per root.<\/p>\n

Keywords: <\/i><\/b>Micropropagation, Anoectochilus <\/i>sp., BA, NAA, shooting<\/p>\n

 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U CH\u1eccN V\u00c0 NH\u00c2N GI\u1ed0NG G\u00c1O TR\u1eaeNG PH\u1ee4C V\u1ee4 TR\u1ed2NG R\u1eeaNG KINH T\u1ebe<\/b><\/p>\n

Nguy\u1ec5n V\u0103n Chi\u1ebfn<\/b><\/p>\n

\u00a0<\/b>Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng t\u1ed1t nh\u1ea5t, ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng v\u00e0 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c c\u00e1c gia \u0111\u00ecnh G\u00e1o tr\u1eafng c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t cho tr\u1ed3ng r\u1eebng. Ngu\u1ed3n v\u1eadt li\u1ec7u gi\u1ed1ng cho c\u00e1c th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c thu h\u00e1i t\u1eeb 53 c\u00e2y tr\u1ed9i G\u00e1o tr\u1eafng \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn t\u1ea1i v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. M\u1ed9t th\u00ed nghi\u1ec7m b\u1ea3o qu\u1ea3n h\u1ea1t trong ph\u00f2ng, 02 th\u00ed nghi\u1ec7m nh\u00e2n gi\u1ed1ng \u1edf v\u01b0\u1eddn \u01b0\u01a1m v\u00e0 01 th\u00ed nghi\u1ec7m kh\u1ea3o nghi\u1ec7m gia \u0111\u00ecnh t\u1ea1i M\u00e3 \u0110\u00e0 – V\u0129nh C\u1eedu – \u0110\u1ed3ng Nai \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: H\u1ea1t gi\u1ed1ng G\u00e1o tr\u1eafng b\u1ea3o qu\u1ea3n \u1edf t\u1ee7 l\u1ea1nh chuy\u00ean d\u00f9ng (#6oC) v\u00e0 b\u1ea3o qu\u1ea3n ng\u0103n m\u00e1t t\u1ee7 l\u1ea1nh (#15oC), sau 1 n\u0103m v\u1eabn cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m l\u00e0 53,5%. \u1ede giai \u0111o\u1ea1n c\u00e2y con \u1edf v\u01b0\u1eddn \u01b0\u01a1m sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t trong \u0111i\u1ec1u ki\u1ec7n che s\u00e1ng 25%, trong th\u1eddi gian 2 – 3 th\u00e1ng \u0111\u1ea7u. G\u00e1o tr\u1eafng d\u1ec5 gi\u00e2m hom, s\u1eed d\u1ee5ng hom t\u1eeb ch\u1ed3i ch\u00ednh c\u1ee7a c\u00e2y con 1 n\u0103m tu\u1ed5i \u0111\u01b0\u1ee3c x\u1eed l\u00fd hormon IBA v\u1edbi n\u1ed3ng \u0111\u1ed9 4000ppm c\u00f3 t\u1ef7 l\u1ec7 ra r\u1ec5 t\u1ed1t nh\u1ea5t (86,7%). C\u00e2y tr\u1ed3ng \u1edf m\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m kh\u1ea3o nghi\u1ec7m gia \u0111\u00ecnh G\u00e1o tr\u1eafng t\u1ea1i M\u00e3 \u0110\u00e0 – \u0110\u1ed3ng Nai, tr\u00ean \u0111\u1ea5t \u0111\u1ed3i ngh\u00e8o dinh d\u01b0\u1ee1ng, t\u1ea7ng \u0111\u1ea5t m\u1ecfng, kh\u00f4, n\u00ean sinh tr\u01b0\u1edfng ch\u1eadm. Sau 3 n\u0103m tu\u1ed5i, sinh tr\u01b0\u1edfng b\u00ecnh qu\u00e2n c\u1ee7a \u0111\u01b0\u1eddng k\u00ednh l\u00e0 6,28cm v\u00e0 chi\u1ec1u cao l\u00e0 5,2m. C\u00f3 8 gia \u0111\u00ecnh t\u1ed1t nh\u1ea5t \u0111\u01b0\u1ee3c ch\u1ecdn v\u1edbi th\u1ec3 t\u00edch th\u00e2n c\u00e2y t\u1eeb 9,6dm3 \u0111\u1ebfn 16,7dm3. T\u1eeb m\u00f4 h\u00ecnh kh\u1ea3o nghi\u1ec7m \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 65 c\u00e2y tr\u1ed9i c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t kho\u1ea3ng 3,0 Sd \u0111\u1ebfn 6,6 Sd v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 t\u1eeb 4,1 Sd \u0111\u1ebfn 6,9 Sd v\u1ec1 chi\u1ec1u cao \u0111\u1ec3 l\u00e0m v\u1eadt li\u1ec7u di truy\u1ec1n cho c\u00e1c pha nghi\u00ean c\u1ee9u ti\u1ebfp theo. Sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e2y tr\u1ed9i \u0111\u1ea1t t\u1eeb 9,2 – 15,6cm, chi\u1ec1u cao t\u1eeb 6,5 – 9,0m; th\u1ec3 t\u00edch \u0111\u1ea1t t\u1eeb 26,8 – 86,0dm3.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>B\u1ea3o qu\u1ea3n h\u1ea1t, ch\u1ecdn gi\u1ed1ng, G\u00e1o tr\u1eafng, gia \u0111\u00ecnh c\u00e2y tr\u1ed9i, nh\u00e2n gi\u1ed1ng hom<\/p>\n

 <\/td>\n<\/tr>\n

Research results on seclection and propagation of Neolamarckia cadamba (Roxb.) Bosser for economic plantation <\/b><\/p>\n

Resource of breed materials for experiments were collected from 53 plus trees in the Southeast region of Vietnam. One seed preserving experiment in laboratory, two propagating experiments in nursery and one progeny testing trial in Ma Da commune, Vinh Cuu district, Dong Nai province were established. The study results showed that N. cadamba <\/i>seed was preserved in 6oC regime by specialized equipment and 15oC regime by refrigerator, after 1 year, germinating rate could still reach 53.5%. In nursery, seedlings with 25% shading during in the first 2 – 3 months were the best growth; cutting of N. cadamba <\/i>was easy to root, cuttings from main stem of 1 year old trees were treated in 4000ppm IBA solution gave the highest rooting rate (86.7%). In the progeny trial, where soil is nutrient poor, thin soil layer, dry so trees grew slowly. After 3 year old, mean diameter and height growth were 6.3cm and 5.2m respectively. Best 8 families were selected with mean tree volume from 9.6 to 16.7dm3. Also from progeny testing trial, 65 plus trees with excess from 3.0 to 6.6 Sd in diameter and 4.1 to 6.9 Sd in height were selected to provide genetic material for the next study phase. The growth of plus trees was from 9.2 to 15.6cm in diameter and 6.5 to 9m in height; individual tree volume reached from 26.8 to 86.0dm3.<\/p>\n

Keywords: <\/i><\/b>seed storage, breeding, Neolamarckia cadamba<\/i>, plus tree family, vegetative propagation<\/p>\n

 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M H\u1ea0T GI\u1ed0NG V\u00c0 PH\u01af\u01a0NG PH\u00c1P B\u1ea2O QU\u1ea2N H\u1ea0T C\u00d3C H\u00c0NH (Azadirachta exselsa <\/i>(Jack) Jacob) \u1ede NINH THU\u1eacN<\/b><\/p>\n

Ph\u00f9ng V\u0103n Khen<\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m h\u1ea1t gi\u1ed1ng C\u00f3c h\u00e0nh cho th\u1ea5y: Tr\u1ecdng l\u01b0\u1ee3ng 1000 qu\u1ea3 C\u00f3c h\u00e0nh ch\u00edn l\u00fac ch\u01b0a x\u1eed l\u00fd l\u00e0 1.139,6 gram, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 1kg c\u00f3 878 qu\u1ea3; 1000 h\u1ea1t C\u00f3c h\u00e0nh sau ph\u01a1i kh\u00f4 trong m\u00e1t t\u1eeb 2 – 3 ng\u00e0y c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 419,9 gram, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 1kg h\u1ea1t kh\u00f4 l\u00e0 2.382 h\u1ea1t. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n \u0111\u1ed1i v\u1edbi h\u1ea1t C\u00f3c h\u00e0nh, t\u00e1c gi\u1ea3 \u0111\u00e3 th\u1eed nghi\u1ec7m 5 ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n kh\u00e1c nhau, g\u1ed3m: B\u1ea3o qu\u1ea3n trong h\u0169 b\u1ecbt k\u00edn \u0111\u1ec3 \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng; b\u1ea3o qu\u1ea3n trong h\u0169 b\u1ecbt k\u00edn tr\u1ed9n tro theo t\u1ef7 l\u1ec7 25% tro \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng; b\u1ea3o qu\u1ea3n trong h\u0169 b\u1ecbt k\u00edn \u1edf nhi\u1ec7t \u0111\u1ed9 0oC, b\u1ea3o qu\u1ea3n trong h\u0169 b\u1ecbt k\u00edn \u1edf nhi\u1ec7t \u0111\u1ed9 (- 5oC), b\u1ea3o qu\u1ea3n trong h\u0169 b\u1ecbt k\u00edn \u1edf nhi\u1ec7t \u0111\u1ed9 (- 12oC). V\u1edbi m\u1ed7i ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n, t\u00e1c gi\u1ea3 theo d\u00f5i th\u1eddi gian b\u1ea3o qu\u1ea3n kh\u00e1c nhau l\u00e0 5 ng\u00e0y, 10 ng\u00e0y, 20 ng\u00e0y, 30 ng\u00e0y, 50 ng\u00e0y, 70 ng\u00e0y v\u00e0 90 ng\u00e0y. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea cho th\u1ea5y sai kh\u00e1c gi\u1eefa c\u00e1c ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n trong th\u1eddi gian ng\u1eafn (t\u1eeb 5 ng\u00e0y \u0111\u1ebfn 15) l\u00e0 kh\u00f4ng r\u00f5 r\u00e0ng v\u00e0 kh\u00f4ng c\u00f3 \u00fd ngh\u0129a v\u1ec1 m\u1eb7t th\u1ed1ng k\u00ea, tuy nhi\u00ean khi th\u1eddi gian b\u1ea3o qu\u1ea3n t\u0103ng th\u00ec c\u00f3 s\u1ef1 kh\u00e1c nhau gi\u1eefa ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n v\u00e0 t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m cao nh\u1ea5t khi b\u1ea3o qu\u1ea3n trong h\u0169 b\u1ecbt k\u00edn \u1edf nhi\u1ec7t \u0111\u1ed9 – 5oC (51,7%), th\u1ea5p nh\u1ea5t khi \u0111\u1ec3 trong h\u0169 b\u1ecbt k\u00edn \u0111\u1ec3 nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng (8,3%). Trong khi \u0111\u00f3 th\u1eddi gian b\u1ea3o qu\u1ea3n l\u00e0 nh\u00e2n t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t gi\u1ed1ng. Th\u1eddi gian b\u1ea3o qu\u1ea3n t\u1ed1t nh\u1ea5t cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m cao ch\u1ec9 trong kho\u1ea3ng 5 ng\u00e0y, sau \u0111\u00f3 t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m gi\u1ea3m d\u1ea7n theo th\u1eddi gian v\u00e0 sau 30 ng\u00e0y t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m trung b\u00ecnh gi\u1eefa c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ec9 c\u00f2n 28,1%; sau 50 ng\u00e0y b\u1ea3o qu\u1ea3n th\u00ec h\u1ea7u nh\u01b0 h\u1ea1t gi\u1ed1ng \u0111\u00e3 m\u1ea5t s\u1ee9c n\u1ea3y m\u1ea7m (2,7%) v\u00e0 sau 70 ng\u00e0y h\u1ea1t gi\u1ed1ng m\u1ea5t s\u1ee9c n\u1ea3y m\u1ea7m ho\u00e0n to\u00e0n \u1edf t\u1ea5t c\u1ea3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p. Nh\u01b0 v\u1eady, c\u1ea7n c\u00f3 k\u1ebf ho\u1ea1ch s\u1eed d\u1ee5ng h\u1ea1t gi\u1ed1ng ngay sau thu h\u00e1i trong kho\u1ea3ng 5 \u0111\u1ebfn 10 ng\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m t\u1ed1t nh\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>C\u00f3c h\u00e0nh, b\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m, nh\u00e2n gi\u1ed1ng<\/p>\n

 <\/td>\n<\/tr>\n

Study on characterization of Azadirachta exselsa seeds and storage method in Ninh Thuan <\/b><\/p>\n

The study on chracterization of Azadirachta exselsa <\/i>seeds showed that: the weight of 1000 fruits without treatment is 1,139.6 gram (1kg cosists of 878 ruits); the weight of 1000 seeds after drying in cool condistion 2 – 3 days is 1,139.6 gram (1kg of dry seeds consists of 2,382 seeds). To determinne suitable methods of seed storagre, author experiment with 5 different methods, including: Storing in a sealed jar at room temperature; storing in a sealed jar with ashes mixed of 25% volume; storing in sealed jar at temperatures of 0oC, storing in sealed jar at temperatures of – 5oC and storing in a sealed jar at temperature of – 12oC. With each storage treatment, different storage time of 5 days, 10 days, 20 days, 30 days, 50 days, 70 days and 90 days were also tested. After statistical analysis, the test results showed that storage methods were not affected significantly to the rate of germination. However, the storage time is a significant factor for germination of seeds. The best storage time for germination is among 5 days, then the germination decreased with time. After 30 days of storage, the average germination of the methods was only 28.1%; after 50 days of storage, a seed almost lost its germination capacity, germination is negligible (2.7%), after 70 days, seed germination was completely lost in all the experimental treatments. So that, seed using should be planed after fruit collection in 5 – 10 days for best germination rate.<\/p>\n

Keywords: <\/i><\/b>Azadirachta exselsa<\/i>, seed storage, germination rate, breeding<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U GI\u00c2M HOM CHI\u00caU LI\u00caU N\u01af\u1edaC (Terminalia calamansanai <\/i>Rolfe)<\/b><\/p>\n

Nguy\u1ec5n Thanh Minh, \u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e0 <\/b><\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m x\u00e1c \u0111\u1ecbnh lo\u1ea1i, n\u1ed3ng \u0111\u1ed9 ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng, gi\u00e1 th\u1ec3 v\u00e0 th\u1eddi gian x\u1eed l\u00fd thu\u1ed1c t\u1ed1t nh\u1ea5t cho gi\u00e2m hom Chi\u00eau li\u00eau n\u01b0\u1edbc. Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng IAA, NAA, v\u00e0 IBA v\u1edbi n\u1ed3ng \u0111\u1ed9 t\u1eeb 500ppm; 1.000ppm; 1.500ppm; 2.000ppm \u1edf d\u1ea1ng n\u01b0\u1edbc cho th\u1ea5y IBA 1.500ppm cho t\u1ef7 l\u1ec7 ra r\u1ec5 v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 cao nh\u1ea5t (t\u01b0\u01a1ng \u1ee9ng l\u00e0 89,9% v\u00e0 25,1). Nghi\u00ean c\u1ee9u v\u1ec1 gi\u00e1 th\u1ec3 gi\u00e2m s\u1eed d\u1ee5ng 3 lo\u1ea1i kh\u00e1c nhau l\u00e0 GT1 (100% \u0111\u1ea5t t\u1ea7ng m\u1eb7t); GT2 (70% \u0111\u1ea5t t\u1ea7ng m\u1eb7t + 30% x\u01a1 d\u1eeba) v\u00e0 GT3 (50% \u0111\u1ea5t t\u1ea7ng m\u1eb7t + 50% x\u01a1 d\u1eeba). K\u1ebft qu\u1ea3 cho th\u1ea5y s\u1eed d\u1ee5ng gi\u00e1 th\u1ec3 ru\u1ed9t b\u1ea7u GT3 cho t\u1ef7 l\u1ec7 ra r\u1ec5 80,1% v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 31,7. Th\u00ed nghi\u1ec7m x\u00e1c \u0111\u1ecbnh th\u1eddi gian x\u1eed l\u00fd thu\u1ed1c cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t \u1edf nghi\u1ec7m th\u1ee9c c\u00f3 th\u1eddi gian x\u1eed l\u00fd 90 gi\u00e2y, t\u1ef7 l\u1ec7 ra r\u1ec5 88,1% v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 36,1.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Chi\u00eau li\u00eau n\u01b0\u1edbc, gi\u00e2m hom, t\u1ef7 l\u1ec7 ra r\u1ec5<\/p>\n

 <\/td>\n<\/tr>\n

Propagation results of Terminalia calamansanai rolfe by cutting <\/b><\/p>\n

The objective of the study was to determine the type, concentration of hormone, potting mixes and time of hormone treatment in Terminalia calamansanai <\/i>Rolfe cutting. The effect of hormone IAA, NAA, and IBA with the concentration of 500 ppm; 1.000ppm; 1.500ppm; 2.000ppm in solution on rooting percentage of cuttings was implemented. The results showed that 1.500ppm IBA gave highest rooting percentage and rooting index, respectively 89.9% and 25.1. For potted mixing, three different treatments were used as follows: GT1: 100% topsoil, GT2: 70% topsoil + 30% coir; GT3: 50% topsoil + 50% coir. The results showed that treatment GT3 (50% topsoil + 50% coir) gave 80.1% rooting percentage and highest rooting index (31.7). The best time for hormone treatment is 90 seconds, with 88.1% rooting percentage and 36.1 rooting index.<\/p>\n

Keywords: <\/i><\/b>Terminalia calamansanai <\/i>Rolfe, <\/i>cutting propagation, rooting percentage<\/p>\n

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NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M SINH TR\u01af\u1edeNG C\u1ee6A V\u01af\u1edcN GI\u1ed0NG TR\u00c0M \u1ede TH\u1ea0NH HO\u00c1, LONG AN<\/b><\/p>\n

Nguy\u1ec5n V\u0103n Thi\u1ebft, \u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i, Phan Th\u1ecb M\u1ef5 Lan <\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

C\u00e2y Tr\u00e0m \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2y ch\u1ee7 l\u1ef1c c\u1ee7a c\u00e1c t\u1ec9nh Nam B\u1ed9 trong n\u1ed7 l\u1ef1c th\u00edch \u1ee9ng v\u1edbi bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, \u0111\u1eb7c bi\u1ec7t l\u00e0 n\u01b0\u1edbc bi\u1ec3n d\u00e2ng. B\u00e0i b\u00e1o n\u00e0y tr\u00ecnh b\u00e0y \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng c\u1ee7a v\u01b0\u1eddn gi\u1ed1ng Tr\u00e0m l\u00e1 d\u00e0i v\u00e0 Tr\u00e0m ta \u1edf tu\u1ed5i 7. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh tr\u00ean v\u01b0\u1eddn gi\u1ed1ng Tr\u00e0m 7 tu\u1ed5i, trong \u0111\u00f3 v\u01b0\u1eddn gi\u1ed1ng Tr\u00e0m l\u00e1 d\u00e0i c\u00f3 30 gia \u0111\u00ecnh, v\u01b0\u1eddn gi\u1ed1ng Tr\u00e0m ta c\u00f3 80 gia \u0111\u00ecnh. K\u1ebft qu\u1ea3 cho th\u1ea5y, l\u01b0\u1ee3ng t\u0103ng t\u01b0\u1edfng trung b\u00ecnh h\u00e0ng n\u0103m c\u1ee7a Tr\u00e0m l\u00e1 d\u00e0i (MAI) t\u00ednh \u0111\u1ebfn tu\u1ed5i 7 \u0111\u1ea1t 17,5 m3\/ha\/n\u0103m (sau khi \u0111\u00e3 t\u1ec9a th\u01b0a 50% s\u1ed1 c\u00e2y); Tr\u00e0m ta \u0111\u1ea1t 8,5 m3\/ha\/n\u0103m (sau khi \u0111\u00e3 t\u1ec9a th\u01b0a 50% s\u1ed1 c\u00e2y), cao h\u01a1n so v\u1edbi c\u00e1c xu\u1ea5t x\u1ee9 Weipa, Bensbach – PNG – 2 v\u00e0 Kuru Oriomo – PNG – 3 \u0111\u01b0\u1ee3c kh\u1ea3o nghi\u1ec7m tr\u01b0\u1edbc \u0111\u00e2y.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Tr\u00e0m ta, Tr\u00e0m l\u00e1 d\u00e0i, sinh tr\u01b0\u1edfng, c\u1ea3i thi\u1ec7n gi\u1ed1ng<\/p>\n

 <\/td>\n<\/tr>\n

Melaleuca seed orchards in Long An: Growth and potential for tree improvement <\/b><\/p>\n

Melaleuca, one of the promising species, can be utilized effectively for climate change adaptation in Southern Vietnam. This study presents the results obtained from 7 – year-old seed orchards that were established based on 80 families of M. cajuputi <\/i>and 30 families of M. leucadendra<\/i>. The results showed that mean annual increament (MAI) of M. leucadendra <\/i>reached 17.5 m3\/ha\/year (after thinning 50%) while that of M. cajuputi <\/i>was 8.5 m3\/ha\/year (after thinning 50%) that is higher than that of other tested provenances such as Weipa, Bensbach – PNG – 2 and Kuru Oriomo – PNG – 3.<\/p>\n

Keywords: <\/i><\/b>M. leucadendra<\/i>, M. cajuputi<\/i>, growth, tree improvement<\/p>\n

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K\u1ebeT QU\u1ea2 S\u01afU T\u1eacP TR\u1ed2NG B\u1ed4 SUNG LO\u00c0I CHO V\u01af\u1edcN S\u01afU T\u1eacP TH\u1ef0C V\u1eacT TR\u1ea2NG BOM GIAI \u0110O\u1ea0N 2010 – 2015<\/b><\/p>\n

Tr\u1ea7n V\u0103n S\u00e2m <\/b><\/p>\n

Trung t\u00e2m NCTN L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9<\/i><\/p>\n<\/div>\n

\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

K\u1ebft qu\u1ea3 s\u01b0u t\u1eadp, tr\u1ed3ng b\u1ed5 sung lo\u00e0i cho V\u01b0\u1eddn s\u01b0u t\u1eadp th\u1ef1c v\u1eadt Tr\u1ea3ng Bom \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb n\u0103m 2010 – 2015. Trong giai \u0111o\u1ea1n \u0111\u00f3, Trung t\u00e2m \u0111\u00e3 s\u01b0u t\u1eadp v\u00e0 tr\u1ed3ng b\u1ed5 sung \u0111\u01b0\u1ee3c 112 lo\u00e0i thu\u1ed9c 45 h\u1ecd th\u1ef1c v\u1eadt, trong \u0111\u00f3 c\u00f3 90 lo\u00e0i m\u1edbi v\u00e0 08 lo\u00e0i qu\u00fd hi\u1ebfm c\u00f3 t\u00ean trong s\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam. C\u00e2y tr\u1ed3ng c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng tr\u00ean 95%, c\u00e2y sinh tr\u01b0\u1edfng kh\u1ecfe m\u1ea1nh, kh\u00f4ng b\u1ecb s\u00e2u b\u1ec7nh h\u1ea1i t\u1ea5n c\u00f4ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>V\u01b0\u1eddn s\u01b0u t\u1eadp th\u1ef1c v\u1eadt, b\u1ea3o t\u1ed3n ngo\u1ea1i vi, Tr\u1ea3ng Bom<\/p>\n

 <\/td>\n<\/tr>\n

The results of collecting and additional planting some native species in Trang Bom Arboretum in period 2010 – 2015 <\/b><\/p>\n

The collecting, additional planting some native species in Trang Bom Arboretum have implemented for period 2010 – 2015 with 112 forest species of 45 families including 90 new species and 8 precious – rare species in Vietnam Red Book. The planted trees in this stages were over 95% of survival rate, growth well, and good health without insect infection.<\/p>\n

Keywords: <\/i><\/b>Arboretum, ex – situ conservation, Trang Bom<\/p>\n

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X\u00c1C \u0110\u1ecaNH NGUY\u00caN NH\u00c2N G\u00c2Y CH\u1ebeT R\u1eeaNG PHI LAO (Casuarian equisetifolia <\/i>J.R et G. Fors) VEN BI\u1ec2N T\u1ea0I X\u00c3 \u0110\u00d4NG H\u1ea2I, HUY\u1ec6N DUY\u00caN H\u1ea2I, T\u1ec8NH TR\u00c0 VINH<\/b><\/p>\n

Ho\u00e0ng V\u0103n Th\u01a1i1, L\u00ea Thanh Quang1, Nguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u1, V\u0169 V\u0103n \u0110\u1ecbnh2, \u0110\u1eb7ng Nh\u01b0 Qu\u1ef3nh2, Ng\u00f4 V\u0103n B\u00ecnh3<\/b><\/p>\n

1 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 2 Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng 3 Ph\u00e2n vi\u1ec7n C\u01a1 \u0111i\u1ec7n N\u00f4ng nghi\u1ec7p v\u00e0 C\u00f4ng ngh\u1ec7 sau thu ho\u1ea1ch<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

R\u1eebng Phi lao (Casuarian equisetifolia <\/i>J.R et G. Fors) ven bi\u1ec3n c\u00f3 vai tr\u00f2 h\u1ebft s\u1ee9c quan tr\u1ecdng trong vi\u1ec7c b\u1ea3o v\u1ec7 \u0111\u00ea, h\u1ea1n ch\u1ebf s\u1ef1 t\u00e0n ph\u00e1 c\u1ee7a gi\u00f3 b\u00e3o, s\u00f3ng th\u1ea7n v\u00e0 n\u01b0\u1edbc bi\u1ec3n d\u00e2ng. Song nguy\u00ean nh\u00e2n g\u00e2y ch\u1ebft r\u1eebng Phi lao ven bi\u1ec3n t\u1ea1i x\u00e3 \u0110\u00f4ng H\u1ea3i, huy\u1ec7n Duy\u00ean H\u1ea3i, t\u1ec9nh Tr\u00e0 Vinh b\u01b0\u1edbc \u0111\u1ea7u x\u00e1c \u0111\u1ecbnh do m\u00f4i tr\u01b0\u1eddng \u0111\u1ea5t c\u00f3 h\u00e0m l\u01b0\u1ee3ng dinh d\u01b0\u1ee1ng th\u1ea5p, ng\u1eadp n\u01b0\u1edbc c\u1ee5c b\u1ed9 l\u00e0m c\u00e2y sinh tr\u01b0\u1edfng k\u00e9m v\u00e0 b\u1ecb b\u1ec7nh h\u1ea1i r\u1ec5, b\u1ec7nh ph\u1ed3ng d\u1ed9p th\u00e2n. K\u1ebft qu\u1ea3 ph\u00e2n l\u1eadp \u0111\u01b0\u1ee3c 5 ch\u1ee7ng n\u1ea5m g\u00e2y b\u1ec7nh: b\u1ed1n ch\u1ee7ng n\u1ea5m h\u1ea1i r\u1ec5 bao g\u1ed3m: ch\u1ee7ng C5PL (Pythium <\/i>sp), ch\u1ee7ng C4PL (Pythium vexans); <\/i>ch\u1ee7ng C4PL (Phytopythium helicoides<\/i>); ch\u1ee7ng PLR7 (Phytophthora <\/i>sp) v\u00e0 ch\u1ee7ng n\u1ea5m g\u00e2y ph\u1ed3ng d\u1ed9p th\u00e2n c\u00e2y (Trichosporium vesiculosum <\/i>Butl). S\u1eed d\u1ee5ng bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u1eeb t\u1ed5ng h\u1ee3p nh\u01b0: \u1ede nh\u1eefng khu v\u1ef1c \u0111\u1ea5t ngh\u00e8o dinh d\u01b0\u1ee1ng c\u1ea7n b\u1ed5 sung th\u00eam ph\u00e2n NPK cho c\u00e2y, c\u00e1c \u0111\u1ecba \u0111i\u1ec3m ng\u1eadp \u00fang c\u1ee5c b\u1ed9 c\u1ea7n \u0111\u00e0o m\u01b0\u01a1ng tho\u00e1t n\u01b0\u1edbc trong m\u00f9a m\u01b0a, lo\u1ea1i b\u1ecf nh\u1eefng c\u00e2y ch\u1ebft, c\u00e2y b\u1ecb b\u1ec7nh n\u1eb7ng \u0111\u1ec3 tr\u00e1nh l\u00e2y lan. Nh\u1eefng khu v\u1ef1c b\u1ecb b\u1ec7nh c\u00f3 th\u1ec3 d\u00f9ng thu\u1ed1c h\u00f3a h\u1ecdc Ridomin 72WP n\u1ed3ng \u0111\u1ed9 1%; Agrifos 400 n\u1ed3ng \u0111\u1ed9 1% \u0111\u1ec3 ph\u00f2ng tr\u1eeb. N\u00ean ch\u1ecdn gi\u1ed1ng Phi lao c\u00f3 kh\u1ea3 n\u0103ng kh\u00e1ng b\u1ec7nh \u0111\u1ec3 tr\u1ed3ng r\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Phi lao, b\u1ec7nh h\u1ea1i, m\u00f4i tr\u01b0\u1eddng \u0111\u1ea5t, n\u1ea5m b\u1ec7nh<\/p>\n

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The causes which induce dead of Casuarian equisetifolia J.R et G. Fors in coastal area of Dong Hai commune, duyen hai district of Tra Vinh <\/b><\/p>\n

The research was carried out in Dong Hai commune, Duyen Hai district, Tra Vinh province. Aim of the research was to identify causes of dead of Casuariana equisetifolia <\/i>J.R et G. Fors at this commune. Research methodology was: establishing survey plots, collecting informations on degree of disease, collecting samples from water, soil and infected parts of tree (root, stem, branches and leaves). Data Analysis was also made for nutrient, toxic substances in soil and water. In addition, infectious samples were isolated for identification of pathogenic agents. Thereafter, artificial infection treatments were made for confirmation of pathogenic agent. Results showed that dead ratio was approximate 48% in the surveyed plots. Nutrient index was low in water and soil samples. Low pH of soils and waters and partial submergence are considered as initial causes to generate growth reduction and poor tolerance in Casuariana trees. Results also implied the dead of Casuariana equisetifolia <\/i>J.R et G. Fors was four isolates of fungus which induce disease on root of tree. They are isolates C5PL (Pythium <\/i>sp), C4PL (Pythium vexans); <\/i>C4PL (Phytopythium helicoides<\/i>) and PLR7 (Phytophthora <\/i>spp). The fungus which causes bark swell was identified as Trichosporium vesiculosum <\/i>Butl. Two fungicides namely Ridomin 72WP at 1% and Agrifos 400 at 1% have effectively shown to controlled isolate PLR7 Phytophthora <\/i>spp. in laboratory.<\/p>\n

Keywords: <\/i><\/b>Casuariana equisetifolia, <\/i>plant pathology, soil environment, fungi<\/p>\n

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NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT KINH DOANH R\u1eeaNG TR\u00c0M CH\u1ed2I SAU KHAI TH\u00c1C TR\u1eaeNG \u1ede HUY\u1ec6N TH\u1ea0NH HO\u00c1, T\u1ec8NH LONG AN<\/b><\/p>\n

\u00a0Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t1, Ph\u1ea1m Minh To\u1ea1i2<\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 2Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/p>\n<\/div>\n

\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

B\u00e0i b\u00e1o n\u00e0y tr\u00ecnh b\u00e0y c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 k\u1ef9 thu\u1eadt kinh doanh r\u1eebng ch\u1ed3i tr\u00ean m\u1ed9t s\u1ed1 xu\u1ea5t x\u1ee9 tr\u00e0m (Melaleuca) sau khai th\u00e1c tr\u1eafng \u1edf huy\u1ec7n Th\u1ea1nh Ho\u00e1, t\u1ec9nh Long An. K\u1ebft qu\u1ea3 cho th\u1ea5y trong 5 xu\u1ea5t x\u1ee9 \u0111\u01b0\u1ee3c kh\u1ea3o nghi\u1ec7m \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 2 xu\u1ea5t x\u1ee9 c\u00f3 tri\u1ec3n v\u1ecdng l\u00e0 Tr\u00e0m \u00fac Cambridge G. Western As (1206) v\u00e0 Tr\u00e0m ta T\u1ecbnh Bi\u00ean, An Giang (7V05). Hai xu\u1ea5t x\u1ee9 n\u00e0y c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng r\u1eebng ch\u1ed3i l\u1ea7n l\u01b0\u1ee3t l\u00e0: t\u1ef7 l\u1ec7 ra ch\u1ed3i 93,73% v\u00e0 74,13%; s\u1ed1 ch\u1ed3i\/g\u1ed1c 5,6 v\u00e0 4,2 c\u00e1i; t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i do s\u00e2u \u0111\u1ee5c th\u00e2n 25,0 v\u00e0 4,6%; sau 6 n\u0103m tu\u1ed5i n\u0103ng su\u1ea5t r\u1eebng \u0111\u1ea1t 166,9 v\u00e0 106,3m3 khi \u0111\u1ec3 l\u1ea1i 2 ch\u1ed3i\/g\u1ed1c. R\u1eebng tr\u1ed3ng 6 n\u0103m tu\u1ed5i \u1edf m\u1eadt \u0111\u1ed9 tr\u1ed3ng ban \u0111\u1ea7u t\u1eeb 10.000 \u0111\u1ebfn 20.000 c\u00e2y\/ha sau khai th\u00e1c tr\u1eafng \u0111\u1ec3 l\u1ea1i t\u1eeb 2 – 3 ch\u1ed3i\/g\u1ed1c c\u00f3 n\u0103ng su\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi r\u1eebng tr\u1ed3ng m\u1edbi \u1edf tu\u1ed5i 5 v\u00e0 \u0111\u00e3 mang l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf cao trong kinh doanh r\u1eebng ch\u1ed3i.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>T\u00e1i sinh ch\u1ed3i, Tr\u00e0m, xu\u1ea5t x\u1ee9, n\u0103ng su\u1ea5t r\u1eebng<\/p>\n

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Study of Melaleuca coppice plantation after clear cutting in Thanh Hoa district, Long An province <\/b><\/p>\n

This article presents results of technical research on some provenaces of Melaleuca coppice plantation after havested in Thanh Hoa district, Long An province. The results showed that there were two promising provenences among 5 tested provenances: Cambridge G. Western As (1206) and M. cajuputi <\/i>Tinh Bien, An Giang (7V05) in which growth indicators are: 93.73% and 74.13% of coppice reproduction rate; number of coppice per stump was 5.6 and 4.2; disease rate was 25.0% and 4.6%, respectively. The wood productivity was 166.9 m3\/ha and 106.3 m3\/ha for the two provenences after 6 years of rotation. The productivity of plantation which planted at the density of 10,000 – 20,000 trees\/ha with remained 2 or 3 stems per tree after harvesting, is as good as that of a 5 years old of new plantation, bringing financial benefits when coppice plantation method is applied.<\/p>\n

Keywords: <\/i><\/b>coppice regeneration, Melaleuca, provenance, productivity<\/p>\n

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\u1ea2NH H\u01af\u1edeNG TH\u1ec2 N\u1ec0N \u0110\u1ebeN SINH TR\u01af\u1edeNG V\u00c0 T\u1ef6 L\u1ec6 S\u1ed0NG C\u1ee6A M\u1ed8T S\u1ed0 LO\u00c0I C\u00c2Y NG\u1eacP M\u1eb6N TR\u1ed2NG T\u1ea0I C\u00c1C \u0110\u1ea2O V\u00d9NG BI\u1ec2N PH\u00cdA NAM, VI\u1ec6T NAM<\/b><\/p>\n

Ho\u00e0ng V\u0103n Th\u01a1i <\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c d\u1ea1ng th\u1ec3 n\u1ec1n \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng, sinh tr\u01b0\u1edfng c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n tr\u1ed3ng tr\u00ean c\u00e1c \u0111\u1ea3o v\u00f9ng bi\u1ec3n ph\u00eda Nam, Vi\u1ec7t Nam \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i \u0111\u1ea3o Nh\u1ea5t T\u1ef1 S\u01a1n, S\u00f4ng C\u1ea7u, Ph\u00fa Y\u00ean v\u00e0 C\u00f4n \u0110\u1ea3o, B\u00e0 R\u1ecba – V\u0169ng T\u00e0u, t\u1eeb n\u0103m 2010 \u0111\u1ebfn 2013. \u0110\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u l\u00e0 S\u00fa \u0111\u1ecf (Aegiceras floridum), <\/i>M\u1eafm bi\u1ec3n (Avicennia marina)<\/i>, D\u00e0 v\u00f4i (Ceriops tagal)<\/i>, \u0110\u01b0\u1edbc (Rhizophora apiculata)<\/i>, \u0110\u01b0ng (R. mucronata) <\/i>v\u00e0 \u0110\u00e2ng (R. stylosa)<\/i>. M\u1ee5c \u0111\u00edch c\u1ee7a nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u1ea3nh h\u01b0\u1edfng c\u1ee7a y\u1ebfu t\u1ed1 th\u1ec3 n\u1ec1n \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n, l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c tr\u1ed3ng r\u1eebng ng\u1eadp m\u1eb7n b\u1ea3o v\u1ec7 c\u00e1c \u0111\u1ea3o, l\u01b0u gi\u1eef tr\u1ea7m t\u00edch, ch\u1ed1ng s\u1ea1t l\u1edf v\u00e0 t\u1ea1o m\u00f4i tr\u01b0\u1eddng thu\u1eadn l\u1ee3i cho c\u00e1c lo\u00e0i th\u1ee7y s\u1ea3n, b\u1ea3o v\u1ec7 c\u1ecf bi\u1ec3n v\u00e0 r\u1ea1n san h\u00f4. Th\u00ed nghi\u1ec7m v\u1ec1 th\u1ec3 n\u1ec1n \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean n\u1ec1n \u0111\u00e1, s\u1ecfi, san h\u00f4 theo ki\u1ec3u th\u00ed nghi\u1ec7m hai nh\u00e2n t\u1ed1 ki\u1ec3u l\u00f4 ch\u00ednh – l\u00f4 ph\u1ee5 (Split plot), v\u1edbi 3 l\u1ea7n l\u1eb7p l\u1ea1i. Di\u1ec7n t\u00edch th\u00ed nghi\u1ec7m l\u00e0 3.150m2 (3 th\u1ec3 n\u1ec1n \u00d7 5 lo\u00e0i \u00d7 3 l\u1ea7n l\u1eb7p \u00d7 35 c\u00e2y\/lo\u00e0i). Nh\u00e2n t\u1ed1 th\u1ec3 n\u1ec1n l\u00e0 nh\u00e2n t\u1ed1 ph\u1ee5 \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed v\u00e0o l\u00f4 ch\u00ednh (th\u1ec3 n\u1ec1n \u0111\u00e1, s\u1ecfi v\u00e0 san h\u00f4); nh\u00e2n t\u1ed1 lo\u00e0i c\u00e2y (S) l\u00e0 nh\u00e2n t\u1ed1 ch\u00ednh \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed v\u00e0o l\u00f4 ph\u1ee5. S\u1ed1 li\u1ec7u v\u1ec1 t\u1ef7 l\u1ec7 s\u1ed1ng, sinh tr\u01b0\u1edfng chi\u1ec1u cao v\u00fat ng\u1ecdn (H) \u0111\u01b0\u1ee3c \u0111o sau khi tr\u1ed3ng 6 th\u00e1ng, 1 n\u0103m, 2 n\u0103m v\u00e0 3 n\u0103m; ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch th\u1ed1ng k\u00ea \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m. K\u1ebft qu\u1ea3 sau 3 n\u0103m tr\u1ed3ng cho th\u1ea5y t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y th\u00ed nghi\u1ec7m tr\u00ean d\u1ea1ng th\u1ec3 n\u1ec1n \u0111\u00e1 (27,8% t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 42,2% t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n), th\u1ec3 n\u1ec1n s\u1ecfi (27,1% t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 41,8% t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n) t\u1ed1t h\u01a1n, \u1ed5n \u0111\u1ecbnh h\u01a1n v\u00e0 kh\u00e1c bi\u1ec7t so v\u1edbi th\u1ec3 n\u1ec1n san h\u00f4 (20,7% t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 35,7% t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n); t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao t\u1ed1t nh\u1ea5t l\u00e0 c\u00e2y tr\u1ed3ng tr\u00ean th\u1ec3 n\u1ec1n s\u1ecfi (71,1cm t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 65,9cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n) v\u00e0 kh\u00e1c bi\u1ec7t so v\u1edbi tr\u1ed3ng tr\u00ean th\u1ec3 n\u1ec1n \u0111\u00e1 (67,7cm t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 57,3cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n) v\u00e0 th\u1ec3 n\u1ec1n san h\u00f4 (63,1cm t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 54,6cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n). Lo\u00e0i S\u00fa \u0111\u1ecf kh\u00f3 th\u00edch h\u1ee3p tr\u00ean c\u00e1c d\u1ea1ng th\u1ec3 n\u1ec1n nghi\u00ean c\u1ee9u, t\u1ef7 l\u1ec7 s\u1ed1ng gi\u1ea3m nhanh theo th\u1eddi gian (4,2% t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 10,0% t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n) v\u00e0 s\u1ee9c sinh tr\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao c\u00e2y r\u1ea5t th\u1ea5p (22,9cm t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 21,3cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n). Lo\u00e0i D\u00e0 v\u00f4i c\u0169ng kh\u00f3 th\u00edch h\u1ee3p tr\u00ean c\u00e1c d\u1ea1ng th\u1ec3 n\u1ec1n \u0111\u00e1, s\u1ecfi v\u00e0 san h\u00f4, t\u1ef7 l\u1ec7 s\u1ed1ng gi\u1ea3m c\u00f2n 6,1% v\u00e0 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y r\u1ea5t th\u1ea5p ch\u1ec9 l\u00e0 25,5cm t\u1ea1i C\u00f4n \u0110\u1ea3o. Lo\u00e0i \u0110\u01b0\u1edbc c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng gi\u1ea3m m\u1ea1nh c\u00f2n (8,3% t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 27,7% t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n), nh\u01b0ng c\u00f3 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao kh\u00e1 t\u1ed1t (93,6cm t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 73,6cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n). Lo\u00e0i M\u1eafm bi\u1ec3n c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng cao \u0111\u1ea1t 55,5%, t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao kh\u00e1 \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u \u1edf c\u1ea3 3 d\u1ea1ng th\u1ec3 n\u1ec1n l\u00e0 52,2cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n. Lo\u00e0i \u0110\u01b0ng c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng \u1ed5n \u0111\u1ecbnh theo th\u1eddi gian (42,0% t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 53,3% t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n), t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao kh\u00e1 t\u1ed1t (92,2cm t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 73,3cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n). Lo\u00e0i \u0110\u00e2ng c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng \u1ed5n \u0111\u1ecbnh v\u00e0 cao nh\u1ea5t (65,7% t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 53,0% t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n), t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao kh\u00e1 t\u1ed1t (102,3cm t\u1ea1i C\u00f4n \u0110\u1ea3o v\u00e0 76,0cm t\u1ea1i H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n).<\/p>\n

T\u1eeb kh\u00f3a: Th\u1ec3 n\u1ec1n, r\u1eebng ng\u1eadp m\u1eb7n, v\u00f9ng bi\u1ec3n ph\u00eda Nam<\/p>\n

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Effect of site properties to growth and survival rate of mangrove species Plant ED in South Islands of Vietnam <\/b><\/p>\n

Study on the effects of the site properties to survival rate, growth of some mangrove species planted in South Islands of Vietnam has been made on Nhat Tu Son island, Song Cau, Phu Yen, and Con Dao, Ba Ria – Vung Tau; during 2010 – 2013. Studied species were Aegiceras floridum, Avicennia marina, Ceriops tagal, Rhizophora apiculata, R. mucronata <\/i>and R. stylosa<\/i>. Purpose of this study was to determine the possible effects of site property factors on survival rate and growth of some species of mangroves to provide basis for planting mangroves in protecting the island, maintaining quiet area, controling erosion and creating a favorable environment for aquatic species as well as protecting seagrass and coral reefs. Experiments were arranged on rock, gravel, coral styles with a two – factor experiment (Split plot). The experiments were repeated thrice. Experiment area is 3,150 sq. metres per plot (3 site property types \u00d7 5 species \u00d7 3 replications \u00d7 35 plants\/species). Site property was identified as the sub factor and was arranged into the main plots (rock, gravel and coral). Species (S) were identified as the main factor and arranged in sub plots. Data on survival rate, growth of tree height (H) was measured at 6 months, 1 year, 2 years and 3 years after planting; Statistical analysis was used to evaluate the results. Results showed that survival rate of plants after 3 years was better and more stability on the rock base (27.8% at Con Dao and 42.2% at Nhat Tu Son site) and on the gravel base (27.1% at Con Dao and 41.8% and at Nhat Tu Son) than on the coral base (20.7% and 35.7% in Con Dao and Nhat Tu Son). The best height was recorded on the gravel site (71.1cm in Con Dao and 65.9cm in Nhat Tu Son) and showed significant differences from growing on rocky base (67.7cm at Con Dao and 57.3cm at Nhat Tu Son) and coral base (63.1cm at Con Dao and 54.6cm at Nhat Tu Son). It was observed that the research sites may not suitable for Aegiceras floridum <\/i>based on records of rapid decrease on survival rates (4.2% and 10.0% in Con Dao and Nhat Tu Son) from time to time and very low growth rate (22.9cm and 21.3cm in Con Dao and Nhat Tu Son) of this species. Ceriops tagal <\/i>was hardly suited in the rock, gravel and coral bases. The survival rate of this species was dropped to 6.1% and growthrate was only 25.5cm in Con Dao. Regarding to survival rate of Rhizophora apiculata, <\/i>it was sharply dropped to 8.3% in Con Dao and 27.7% in Nhat Tu Son. However, its growth rate was quite good as 93.6cm in Con Dao and 73.6cm in Nhat Tu Son. A high survival rate (55.5%) was recorded on Avicennia marina <\/i>and a stable growth rate was obsereved in all 3 forms of sites in Nhat Tu Son (52.2cm). Survival rate of Rhizophora mucronata <\/i>was seen stable from time to time (42.0% in Con Dao and 53.3% in Nhat Tu Son). The growth rate was quite good (92.2cm in Con Dao and 73.3cm in Nhat Tu Son). The best survival rate was observed on Rhizophora stylosa <\/i>(65.7% in Con Dao and 53.0% in Nhat Tu Son). Similarly, a very good growth rate was also recorded on this species (102.3cm in Con Dao and 76.0cm in Nhat Tu Son).<\/p>\n

Keywords: <\/b>Site base, mangroves, Southern sea<\/p>\n

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NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M L\u1eacP \u0110\u1ecaA V\u00c0 PH\u00c2N CHIA L\u1eacP \u0110\u1ecaA TR\u1ed2NG R\u1eeaNG NG\u1eacP M\u1eb6N T\u1ea0I C\u00c1C \u0110\u1ea2O V\u00d9NG BI\u1ec2N PH\u00cdA NAM, VI\u1ec6T NAM <\/b><\/p>\n

Ho\u00e0ng V\u0103n Th\u01a1i <\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n

\u00a0T\u00d3M T\u1eaeT <\/b><\/p>\n\n\n\n
Vi\u1ec7t Nam c\u00f3 s\u1ed1 l\u01b0\u1ee3ng kh\u00e1 l\u1edbn c\u00e1c \u0111\u1ea3o v\u00e0 v\u00f9ng ven c\u00e1c \u0111\u1ea3o n\u00e0y \u0111ang ch\u1ecbu t\u00e1c \u0111\u1ed9ng m\u1ea1nh c\u1ee7a s\u00f3ng bi\u1ec3n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong b\u1ed1i c\u1ea3nh bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi m\u1ee5c \u0111\u00edch l\u00e0 x\u00e1c \u0111\u1ecbnh c\u01a1 s\u1edf khoa h\u1ecdc \u0111\u1ec3 ph\u00e2n chia l\u1eadp \u0111\u1ecba l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c tr\u1ed3ng r\u1eebng ng\u1eadp m\u1eb7n b\u1ea3o v\u1ec7 c\u00e1c \u0111\u1ea3o. V\u1edbi ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u d\u1ef1a tr\u00ean c\u00e1c kh\u1ea3o s\u00e1t v\u1ec1 th\u1ec3 n\u1ec1n, \u0111\u1ed9 ng\u1eadp tri\u1ec1u, \u0111\u1ed9 m\u1eb7n n\u01b0\u1edbc bi\u1ec3n v\u00e0 th\u1ef1c v\u1eadt ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean theo tuy\u1ebfn \u0111i\u1ec1u tra; k\u1ebft h\u1ee3p thu m\u1eabu \u0111\u1ea5t, n\u01b0\u1edbc v\u00e0 ph\u00e2n t\u00edch c\u00e1c ch\u1ec9 s\u1ed1 dinh d\u01b0\u1ee1ng v\u00e0 \u0111\u1ed9c t\u1ed1 ch\u00ednh trong ph\u00f2ng th\u00ed nghi\u1ec7m. K\u1ebft qu\u1ea3 \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u0111\u1ed9 ng\u1eadp tri\u1ec1u trung b\u00ecnh cao nh\u1ea5t t\u1ea1i c\u00e1c \u0111\u1ea3o v\u00f9ng bi\u1ec3n ph\u00eda \u0110\u00f4ng l\u00e0 3,51m, v\u00f9ng mi\u1ec1n Trung v\u00e0 c\u00e1c \u0111\u1ea3o xa b\u1edd l\u00e0 1,57m v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 0,95m \u1edf c\u00e1c \u0111\u1ea3o v\u00f9ng bi\u1ec3n ph\u00eda T\u00e2y. \u0110\u1ed9 m\u1eb7n n\u01b0\u1edbc bi\u1ec3n b\u00ecnh qu\u00e2n t\u1ea1i c\u00e1c \u0111\u1ea3o xa b\u1edd c\u00f3 \u0111\u1ed9 m\u1eb7n r\u1ea5t cao 34 – 35\u2030 v\u00e0 kh\u00e1 \u0111\u1ed3ng \u0111\u1ec1u \u1edf c\u00e1c th\u00e1ng trong n\u0103m, c\u00e1c \u0111\u1ea3o ven b\u1edd c\u00f3 \u0111\u1ed9 m\u1eb7n th\u1ea5p h\u01a1n v\u00e0 ch\u1ec9 cao v\u00e0o th\u00e1ng 3 v\u00e0 th\u00e1ng 4. Th\u1ec3 n\u1ec1n t\u1ea1i c\u00e1c \u0111\u1ea3o v\u00f9ng bi\u1ec3n ph\u00eda Nam bao g\u1ed3m 4 d\u1ea1ng th\u1ec3 n\u1ec1n ch\u00ednh l\u00e0 th\u1ec3 n\u1ec1n \u0111\u00e1, d\u1ea1ng s\u1ecfi, d\u1ea1ng san h\u00f4 v\u00e0 d\u1ea1ng c\u00e1t; \u0111\u1eb7c t\u00ednh c\u01a1 b\u1ea3n c\u1ee7a c\u00e1c d\u1ea1ng th\u1ec3 n\u1ec1n n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1t (tr\u00ean 80%), ch\u1ec9 s\u1ed1 pH cao (h\u01a1n 8), \u0111\u1ed9 m\u1eb7n cao, ngh\u00e8o dinh d\u01b0\u1ee1ng. C\u00e1c \u0111\u1ea3o v\u00f9ng bi\u1ec3n ph\u00eda Nam \u0111\u01b0\u1ee3c chia th\u00e0nh 3 v\u00f9ng l\u1eadp \u0111\u1ecba g\u1ed3m: (1) c\u00e1c \u0111\u1ea3o ven bi\u1ec3n Nam Trung B\u1ed9 v\u00e0 c\u00e1c \u0111\u1ea3o ngo\u00e0i kh\u01a1i, (2) c\u00e1c \u0111\u1ea3o ven b\u1edd v\u00f9ng bi\u1ec3n ph\u00eda \u0110\u00f4ng v\u00e0, (3) c\u00e1c \u0111\u1ea3o ven b\u1edd v\u00f9ng bi\u1ec3n ph\u00eda T\u00e2y. M\u1ed7i v\u00f9ng \u0111\u01b0\u1ee3c chia ra 20 d\u1ea1ng l\u1eadp \u0111\u1ecba, g\u1ed3m n\u1ec1n c\u00e1t, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u cao (CMnTc); n\u1ec1n c\u00e1t, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u cao (CMtbTc); n\u1ec1n \u0111\u00e1, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u th\u1ea5p (\u0110MnTt); n\u1ec1n \u0111\u00e1, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u trung b\u00ecnh (\u0110MnTtb); n\u1ec1n \u0111\u00e1, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u cao (\u0110MnTc); n\u1ec1n \u0111\u00e1, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u th\u1ea5p (\u0110MtbTt); n\u1ec1n \u0111\u00e1, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u trung b\u00ecnh (\u0110MtbTtb); n\u1ec1n \u0111\u00e1, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u cao (\u0110MtbTc); n\u1ec1n s\u1ecfi, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u th\u1ea5p (SoMnTt); n\u1ec1n s\u1ecfi, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u trung b\u00ecnh (SoMnTtb); n\u1ec1n s\u1ecfi, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u cao (\u0110MnTc); n\u1ec1n s\u1ecfi, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u th\u1ea5p (SoMtbTt); n\u1ec1n s\u1ecfi, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u trung b\u00ecnh (SoMtbTtb); n\u1ec1n s\u1ecfi, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u cao (SoMtbTc); n\u1ec1n san h\u00f4, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u th\u1ea5p (ShMnTt); n\u1ec1n san h\u00f4, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u trung b\u00ecnh (ShMnTtb); n\u1ec1n san h\u00f4, m\u1eb7n n\u1eb7ng, ng\u1eadp tri\u1ec1u cao (ShMnTc); n\u1ec1n san h\u00f4, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u th\u1ea5p (ShMtbTt); n\u1ec1n san h\u00f4, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u trung b\u00ecnh (ShMtbTtb) v\u00e0 n\u1ec1n san h\u00f4, m\u1eb7n trung b\u00ecnh, ng\u1eadp tri\u1ec1u cao (ShMtbTc).<\/p>\n

T\u1eeb kh\u00f3a: L<\/i><\/b>\u1eadp \u0111\u1ecba, \u0111\u1ea3o, r\u1eebng ng\u1eadp m\u1eb7n, tr\u1ed3ng r\u1eebng, Vi\u1ec7t Nam<\/p>\n

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Site properties and zoning for afforestation of mangrove forests in the several coastal islands in the South of Vietnam <\/b><\/p>\n

The aim of the study was to develop scientific foundations for zoning site conditions for the afforestation of mangrove forests to protect the islands. Research methods were based on surveys on soil properties, tidal inundation, water sea salinity and vegetation distribution following the different survey lines. In adddition, samples of water and soil were collected for analyzing nutrients and major toxic substance index. Results showed that the highest average tidal inundation of 3.51m was recorded in the islands of the Eeastern Sea. It was 1.57m in the Southern Central islands and the of fshore islands and the lowest average tidal inundation of 0.95m was found in the islands of the western Sea. The average salinity of sea water at the offshore islands is highest ranging from 34 – 35\u2030 and the water salinity varies greatly across the months of the year. However, the coastal islands have lower water salinity and in a year this is normally higher in March and May. In the Southern islands there are 4 main types of soil bases that are sandy base, rocky base, gravel base and coral base. The key characteristics of those bases are that they are composed by more than 80% of sand, high pH value (more than 8), high water salinity and poor in nutrition. The southern islands can be grouped into 3 site zones that are: (1) The southern Central islands and offshore islands; (2) The Eastern Islands (Ba Ria – Ca Mau); and (3) The Western Islands (Ca Mau – Kien Giang). Subsequently, each site zone is classified into 20 different site types. Those include sandy base, high salinity and high tidal inundation (CMnTc); sandy base, moderate salinity and high tidal inundation (CMnTc); rocky base, high salinity and low tidal inundation (\u0110MnTt); rocky base, high salinity, moderate tidal inundation (\u0110MnTtb); rocky base, high salinity and high tidal inundation (\u0110MnTc); rocky base, moderate salinity and low tidal inundation (\u0110MTt); rocky base, moderate salinity and moderate tidal inundation (\u0110MTtb); rocky base, moderate salinity and high tidal inundation (\u0110MTc); gravel base, high salinity, low tidal inundation (SoMnTt); gravel base, high salinity, moderate tidal inundation (SoMnTtb); gravel base, high salinity, high tidal inundation (SoMTc); Gravel base, moderate salinity, low tidal inundation (SoMTt); gravel base, moderate salinity, moderate tidal inundation (SoMTtb); gravel base, moderate salinity, high tidal inundation (SoMTc); coral base, high salinity low tidal inundation (ShMnTt); coral base, high salinity, moderate tidal inundation (ShMnTtb); coral base, high salinity, high tidal inundation (SoMTc); coral base, moderate salinity, low tidal inundation (ShMTt); coral base, moderate salinity, moderate tidal inundation (ShMTtb); coral base, moderate salinity, high tidal inundation (ShMTc).<\/p>\n

Keywords: <\/b>afforestation, site, island, mangroves, Vietnam<\/p>\n

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NGHI\u00caN C\u1ee8U G\u00c2Y TR\u1ed2NG M\u1ed8T S\u1ed0 LO\u00c0I C\u00c2Y B\u1ea2N \u0110\u1ecaA PH\u00d2NG CH\u1ed0NG S\u1ea0T L\u1ede VEN S\u00d4NG R\u1ea0CH \u1ede HUY\u1ec6N NH\u00c0 B\u00c8, TH\u00c0NH PH\u1ed0 H\u1ed2 CH\u00cd MINH<\/b><\/p>\n

Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t, V\u00f5 Trung Ki\u00ean <\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

T\u00ecnh tr\u1ea1ng s\u1ea1t l\u1edf b\u1edd s\u00f4ng, k\u00eanh r\u1ea1ch \u1edf Th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh n\u00f3i ri\u00eang v\u00e0 c\u1ea3 n\u01b0\u1edbc n\u00f3i chung, di\u1ec5n ra ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn v\u00e0 m\u1ee9c \u0111\u1ed9 ng\u00e0y c\u00e0ng nghi\u00eam tr\u1ecdng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng ng\u01b0\u1eddi d\u00e2n v\u00e0 s\u1ea3n xu\u1ea5t n\u00f4ng nghi\u1ec7p. Chi ph\u00ed \u0111\u1ea7u t\u01b0 c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng tr\u00ecnh b\u1ea3o v\u1ec7 v\u00e0 ph\u00f2ng ch\u1ed1ng s\u1ea1t l\u1edf r\u1ea5t l\u1edbn nh\u01b0ng hi\u1ec7u qu\u1ea3 kh\u00e1 h\u1ea1n ch\u1ebf v\u00e0 thi\u1ebfu t\u00ednh b\u1ec1n v\u1eefng (Nguy\u1ec5n S\u01a1n Th\u1ee5y, 2007). Nghi\u00ean c\u1ee9u c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng c\u00e2y ph\u00f2ng ch\u1ed1ng s\u1ea1t l\u1edf n\u1ebfu th\u1ef1c hi\u1ec7n \u0111\u1ed3ng b\u1ed9 t\u1eeb kh\u00e2u ch\u1ecdn lo\u00e0i, ch\u1ecdn l\u1eadp \u0111\u1ecba tr\u1ed3ng v\u00e0 gi\u1ea3i ph\u00e1p b\u1ea3o v\u1ec7 c\u00e2y tr\u1ed3ng th\u00edch h\u1ee3p th\u00ec kh\u1ea3 n\u0103ng th\u00e0nh c\u00f4ng r\u1ea5t cao. C\u00e1c gi\u1ea3i ph\u00e1p n\u00e0y s\u1ebd gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 chi ph\u00ed \u0111\u1ea7u t\u01b0 so v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng tr\u00ecnh, \u0111\u1ed3ng th\u1eddi t\u1ea1o \u0111\u01b0\u1ee3c c\u1ea3nh quan xanh ven s\u00f4ng r\u1ea1ch, c\u1ea3i thi\u1ec7n m\u00f4i tr\u01b0\u1eddng, \u0111a d\u1ea1ng sinh h\u1ecdc th\u1ef1c v\u1eadt v\u00e0 t\u1ea1o s\u1ef1 b\u1ec1n v\u1eefng l\u00e2u d\u00e0i (H.T. Chan, 2003). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: (i) H\u1ec7 th\u1ef1c v\u1eadt ven s\u00f4ng r\u1ea1ch \u1edf \u0111\u00e2y kh\u00e1 \u0111a d\u1ea1ng v\u00e0 phong ph\u00fa c\u00f3 19 lo\u00e0i ch\u1ee7 y\u1ebfu thu\u1ed9c 18 h\u1ecd, bao g\u1ed3m th\u1ef1c v\u1eadt n\u01b0\u1edbc ng\u1ecdt, th\u1ef1c v\u1eadt n\u01b0\u1edbc l\u1ee3 v\u00e0 c\u00e1c lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n th\u1ef1c s\u1ef1; (ii) \u0110i\u1ec1u ki\u1ec7n \u0111\u1ea5t \u0111ai \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u l\u00e0 lo\u1ea1i \u0111\u1ea5t ng\u1eadp l\u1ee3 v\u1edbi \u0111\u1ed9 m\u1eb7n th\u1ea5p, th\u00e0nh ph\u1ea7n dinh d\u01b0\u1ee1ng ngh\u00e8o v\u00e0 ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a bi\u00ean \u0111\u1ed9 ng\u1eadp tri\u1ec1u r\u1ea5t l\u1edbn, d\u00f2ng ch\u1ea3y m\u1ea1nh v\u00e0 s\u00f3ng \u0111\u1ed9ng l\u1ef1c s\u00f4ng c\u00f3 t\u00e1c \u0111\u1ed9ng r\u1ea5t m\u1ea1nh m\u1ebd \u0111\u1ebfn c\u00e2y tr\u1ed3ng; (iii) Hi\u1ec7u qu\u1ea3 c\u1ee7a h\u00e0ng r\u00e0o c\u1ea3n s\u00f3ng kh\u00f4ng ph\u00e1t huy t\u00e1c d\u1ee5ng, nh\u01b0ng h\u1ec7 th\u1ed1ng c\u1ecdc \u0111\u1ee1 b\u1eb1ng c\u1eeb tr\u00e0m c\u00f3 t\u00e1c d\u1ee5ng r\u1ea5t t\u1ed1t \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e2y m\u1edbi tr\u1ed3ng; (iv) Sau 2 n\u0103m m\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m, \u0111ai r\u1eebng \u0111a t\u1ea7ng t\u00e1n \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh v\u00e0 ph\u00e1t tri\u1ec3n t\u1ed1t, c\u00f3 t\u00e1c d\u1ee5ng l\u1edbn trong vi\u1ec7c t\u1ea1o b\u1ed3i l\u1eafng v\u00e0 h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c s\u1ea1t l\u1edf; (v) M\u00f4 h\u00ecnh v\u00e0 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng c\u00e2y ph\u00f2ng ch\u1ed1ng s\u1ea1t l\u1edf ven s\u00f4ng r\u1ea1ch c\u00f3 th\u1ec3 nh\u00e2n r\u1ed9ng l\u00e0 M\u00f9 u + D\u00e1i ng\u1ef1a n\u01b0\u1edbc \u1edf \u0111ai tr\u00ean b\u1edd v\u00e0 D\u1eeba n\u01b0\u1edbc + B\u1ea7n chua + M\u00e1i d\u1ea7m \u1edf \u0111ai d\u01b0\u1edbi n\u01b0\u1edbc v\u1edbi \u0111\u1ed9 r\u1ed9ng m\u1ed7i \u0111ai t\u1ed1i thi\u1ec3u g\u1ed3m 4 h\u00e0ng c\u00e2y v\u00e0 ph\u1ea3i c\u00f3 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt h\u1ed7 tr\u1ee3 c\u00e2y tr\u1ed3ng b\u1eb1ng \u0111ai c\u1ea3n s\u00f3ng v\u00e0 c\u1ecdc c\u1eeb tr\u00e0m l\u00e0m gi\u00e1 \u0111\u1ee1 cho c\u00e2y m\u1edbi tr\u1ed3ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>C\u00e2y b\u1ea3n \u0111\u1ecba, s\u1ea1t l\u1edf ven s\u00f4ng r\u1ea1ch, tr\u1ed3ng r\u1eebng ph\u00f2ng h\u1ed9<\/p>\n

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Study of planting some native species to prevent erosion of riverside in Nha Be district, Ho Chi Minh city <\/b><\/p>\n

Erosion of riverside and canals is becoming a common and serious problem in Ho Chi Minh city in particular and the whole country in general, influencing the lives of communities and agricultural production. The investment costs for researching protection solution is costly but it lacks efficiency and it is unsustainable (Nguyen Son Thuy, 2007). Therefore, if studying of tree planting solutions are carried out carefully, from selecting species and site to appropriated – tree – protection solution, they will be tremendously successful with lower investment costs compared to that of construction solutions, creating green landscape along the rivers, increasing environmental value and sustainability (H.T. Chan, 2003). Results of the study implemented in 3 years (from 2010 – 2012) in Nha Be district have shown that: (i) The flora along the rivers in this area is very diverse and abundant. There are 19 species of 18 families, including freshwater flora, brackish water flora and mangrove flora; (ii) Soil type of the study site is brackish wetlands with low salinity, poor nutrition and are being affected by high flooding tidal, strong currents and wave dynamics that strongly influence tree planting; (iii) Wave fence does not work efficicently, but the melaleuca – poles – supporting systems play a significant role in protecting new – planted trees; (iv) After 2 years, the experimental models in Hiep Phuoc commune have tranformed to multi – level forest belts which contribute greatly to the capture of sedimentation and reduction of soil erosion; (v) The models and technical measures for planting trees to prevent erosion of riversides can be replicated are: Calophyllum inophyllum <\/i>+ Amoora cucullata <\/i>for on – land forest belt and Nypa fruticans <\/i>+ Sonneratia caseolaris <\/i>+ Cryptocoryne ciliata <\/i>for forest belts in flooded area along the riverside. A minimum width of each belt comprises 4 rows of trees and must contain technical measures using Melaleuca poles to reduce the waves and support newly planted trees.<\/p>\n

Keywords: <\/b>Native species, erosion of riverside, protected plantation<\/p>\n

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\u1ea2NH H\u01af\u1edeNG C\u1ee6A T\u1ec8A TH\u01afA V\u00c0 PH\u00c2N B\u00d3N T\u1edaI SINH TR\u01af\u1edeNG, N\u0102NG SU\u1ea4T R\u1eeaNG TR\u1ed2NG KEO LAI CUNG C\u1ea4P G\u1ed6 T\u1ea0I KHU V\u1ef0C \u0110\u00d4NG NAM B\u1ed8<\/b><\/p>\n

Ph\u1ea1m V\u0103n B\u1ed1n <\/b><\/p>\n

Trung t\u00e2m \u1ee8ng d\u1ee5ng Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean 4 hi\u1ec7n tr\u01b0\u1eddng th\u00ed nghi\u1ec7m, v\u1edbi 4 \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba kh\u00e1c nhau t\u1ea1i 2 t\u1ec9nh B\u00ecnh Ph\u01b0\u1edbc v\u00e0 \u0110\u1ed3ng Nai. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, t\u1ec9a th\u01b0a v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 cao (48 – 60%) \u0111\u00e3 gi\u00fap sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u00e2y c\u00e1 th\u1ec3 nhanh, s\u1edbm \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u00edch th\u01b0\u1edbc g\u1ed7 x\u1ebb nh\u01b0ng l\u1ea1i l\u00e0m gi\u1ea3m m\u1ea1nh tr\u1eef l\u01b0\u1ee3ng l\u00e2m ph\u1ea7n khi khai th\u00e1c ch\u00ednh. \u1ede th\u00ed nghi\u1ec7m ch\u00ednh, t\u1ea1i th\u1eddi \u0111i\u1ec3m 6,9 n\u0103m tu\u1ed5i, \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n c\u1ee7a nghi\u1ec7m th\u1ee9c T450 v\u00e0 T600 l\u1ea7n l\u01b0\u1ee3t l\u00e0 20,1 v\u00e0 18,4cm (t\u00ednh chung cho c\u1ea3 2 th\u1eddi \u0111i\u1ec3m t\u1ec9a th\u01b0a), \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n k\u00edch th\u01b0\u1edbc g\u1ed7 x\u1ebb l\u1edbn theo y\u00eau c\u1ea7u tr\u00ean th\u1ecb tr\u01b0\u1eddng trong khu v\u1ef1c hi\u1ec7n nay. Trong khi, \u1edf nghi\u1ec7m th\u1ee9c \u0111\u1ed1i ch\u1ee9ng T1143 ch\u1ec9 \u0111\u1ea1t 16,5cm, ch\u1ec9 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c cho nhu c\u1ea7u g\u1ed7 x\u1ebb nh\u1ecf. Tuy nhi\u00ean, t\u1ed5ng tr\u1eef l\u01b0\u1ee3ng g\u1ed7 c\u00e2y \u0111\u1ee9ng khi khai th\u00e1c ch\u00ednh \u1edf nghi\u1ec7m th\u1ee9c T450 v\u00e0 T600 (t\u00ednh chung cho c\u1ea3 2 th\u1eddi \u0111i\u1ec3m t\u1ec9a th\u01b0a) so v\u1edbi nghi\u1ec7m th\u1ee9c T1143 ch\u1ec9 b\u1eb1ng 75,1 v\u00e0 86,4% l\u1ea7n l\u01b0\u1ee3t. N\u1ebfu t\u00ednh ri\u00eang cho t\u1eebng th\u1eddi \u0111i\u1ec3m t\u1ec9a th\u01b0a v\u00e0 c\u1ed9ng c\u1ea3 s\u1ea3n ph\u1ea9m khi t\u1ec9a th\u01b0a th\u00ec nghi\u1ec7m th\u1ee9c T600 t\u1ec9a \u1edf tu\u1ed5i 3, c\u00f3 t\u1ed5ng tr\u1eef l\u01b0\u1ee3ng x\u1ea5p x\u1ec9 so v\u1edbi nghi\u1ec7m th\u1ee9c \u0111\u1ed1i ch\u1ee9ng (147,1 so v\u1edbi 149,7 m3\/ha). V\u1ec1 m\u1eb7t kinh t\u1ebf, nghi\u1ec7m th\u1ee9c T600 \u1edf tu\u1ed5i 3 cho k\u1ebft qu\u1ea3 cao nh\u1ea5t, nh\u01b0ng kh\u00f4ng nhi\u1ec1u so v\u1edbi nghi\u1ec7m th\u1ee9c T1143. K\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c \u1edf c\u00e1c th\u00ed nghi\u1ec7m v\u1ec7 tinh l\u00e0 t\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi k\u1ebft qu\u1ea3 c\u1ee7a th\u00ed nghi\u1ec7m ch\u00ednh \u1edf th\u1eddi \u0111\u1ed9 tu\u1ed5i t\u01b0\u01a1ng \u1ee9ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>\u0110\u00f4ng Nam B\u1ed9, keo lai, ph\u00e2n b\u00f3n, t\u1ec9a th\u01b0a<\/p>\n

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Effects of thinning and fertilizer on growth, productivity of Acacia hybrid plantation for saw – log wood in Southeastern region <\/b><\/p>\n

The study was investigated from four experimental trials located on different site conditions in Binh Phuoc and Dong Nai provinces. The results showed that thinning with high intensity increased tree diameter, reaching diameter size for saw – log earlier at age of 7 year but this practice reduced total stand volume at harvesting. In the Core trial, at age of 6.9 year, D1.3 of T450 and T600 treatments were 20.1 and 18.4cm respectively (added two thinning times), meeting size standard of larg saw – log wood (log ending diameter is over 18cm) in the market. While D1.3 in T1143 treatment was only 16.5cm, satisfying for small saw – log (log ending diameter is from 10 to under 18cm). However, total stand volume of T450 and T600 treament were much less than that of T1143 treament, only 75.1% and 86.4% respectively (added two thinning times). If seperating specific thinning time and adding wood volume at thinning, total wood volume of T600 treatment was approximate with that of T1143 treatment (147.1 m3\/ha comparing with 149,7 m3\/ha). About economic espect, T600 treatment thinned at 3 age gave best outcom but not considerable with T1143. Results of the Sattelite trials were similar to results in the Core trial at the same age.<\/p>\n

Keywords: <\/b>Acacia hybrid, thinning, fertilizer, Southeastern region<\/p>\n

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K\u1ebeT QU\u1ea2 TR\u1ed2NG R\u1eeaNG L\u00d2 BO (Brownlowia tabularis <\/i>Pierre) CUNG C\u1ea4P G\u1ed6 L\u1edaN \u1ede \u0110\u00d4NG NAM B\u1ed8<\/b><\/p>\n

Tr\u1ea7n H\u1eefu Bi\u1ec3n1, L\u00ea Xu\u00e2n Tr\u01b0\u1eddng2<\/b><\/p>\n

\u00a0<\/b>1Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9 2Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

L\u00f2 bo (Brownlowia tabularis <\/i>Pierre) l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba g\u1ed7 l\u1edbn, ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean trong khu v\u1ef1c ph\u00eda Nam. Vi\u1ec7c nghi\u00ean c\u1ee9u g\u00e2y tr\u1ed3ng lo\u00e0i n\u00e0y nh\u1eb1m cung c\u1ea5p nguy\u00ean li\u1ec7u g\u1ed7 l\u1edbn ph\u1ee5c v\u1ee5 s\u1ea3n xu\u1ea5t h\u00e0ng ti\u00eau d\u00f9ng trong n\u01b0\u1edbc v\u00e0 h\u01b0\u1edbng t\u1edbi xu\u1ea5t kh\u1ea9u \u0111\u00e1p \u1ee9ng t\u00e1i c\u01a1 c\u1ea5u ng\u00e0nh l\u00e2m nghi\u1ec7p. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y trong giai \u0111o\u1ea1n 3,5 n\u0103m tu\u1ed5i L\u00f2 bo sinh tr\u01b0\u1edfng kh\u00e1 nhanh, v\u1edbi t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh t\u1eeb 1,5 – 1,7 cm\/n\u0103m, t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao trung b\u00ecnh t\u1eeb 0,9 – 1,1 m\/n\u0103m; t\u1ef7 l\u1ec7 s\u1ed1ng cao tr\u00ean 95%. \u0110\u1ed1i v\u1edbi \u0111i\u1ec1u ki\u1ec7n kh\u00ed h\u1eadu, th\u1ed5 nh\u01b0\u1ee1ng \u0111\u1ea5t feralit c\u00f3 pha s\u1ecfi t\u1ea1i \u0110\u1ed3ng Nai th\u00ec n\u00ean tr\u1ed3ng h\u1ed7n giao v\u1edbi c\u00e2y ph\u1ee5 tr\u1ee3 Mu\u1ed3ng \u0111en v\u1edbi m\u1eadt \u0111\u1ed9 th\u1ea5p (<625 c\u00e2y\/ha) \u0111\u1ec3 h\u1ea1n ch\u1ebf c\u1ecf d\u1ea1i, nh\u01b0ng \u0111\u1ebfn 3,5 tu\u1ed5i c\u1ea7n ki\u1ec3m so\u00e1t ch\u1eb7t b\u1edbt t\u00e1n l\u00e1 Mu\u1ed3ng \u0111en. Trong giai \u0111o\u1ea1n tu\u1ed5i n\u00e0y, m\u1eadt \u0111\u1ed9 tr\u1ed3ng ch\u01b0a \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng L\u00f2 bo, vi\u1ec7c b\u00f3n ph\u00e2n \u0111\u00e3 c\u00f3 \u1ea3nh h\u01b0\u1edfng t\u00edch c\u1ef1c \u0111\u1ebfn sinh tr\u01b0\u1edfng lo\u00e0i n\u00e0y.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>G\u1ed7 x\u1ebb, L\u00f2 bo, r\u1eebng tr\u1ed3ng<\/p>\n

 <\/td>\n<\/tr>\n

The results of some sivilcutural tecniques for Brownlowia tabularis Pierre plantation in Vietnam Southeastern <\/b><\/p>\n

Brownlowia tabularis <\/i>Pierre is native tree with big stem, natural distribution in forest at Vietnam Southern. The study this species for plantation with sawlog supplying purpose to exporting and domestic using, as well as to metting the restructure of forestry. The results show that B.tabularis <\/i>is fast growth species with diameter increment from 1.5 – 1.7 cm\/year, height increment from 0.9 – 1.1 m\/year, survival rate over 95% at 3.5 years old. In condition of climate and feralit soil in Dong Nai, the mixed planting trial of B.tabularis <\/i>and Senna siamea <\/i>with low planted density (<625 trees\/ha) was good solution to control weed, however it is need to pay attention for competition of Senna siamea <\/i>canopy at 3.5 year old plantation by pruning. The planted density trial of B.tabularis <\/i>was not significant by growth in this period (<3.5 years old), white fertilizer trial shows significant result about growth as bigger of diameter and heigh of trees in fertilizer using.<\/p>\n

Keywords: <\/b>Brownlowia tabularis <\/i>Pierre, plantation, sawlog<\/p>\n

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NGHI\u00caN C\u1ee8U M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC V\u00c0 BI\u1ec6N PH\u00c1P K\u1ef8 THU\u1eacT TR\u1ed2NG R\u1eeaNG S\u1ea4U T\u00cdA (Sandoricum indicum <\/i>Cav) NH\u1eb0M CUNG C\u1ea4P G\u1ed6 L\u1edaN T\u1ea0I V\u00d9NG \u0110\u00d4NG NAM B\u1ed8 <\/b><\/p>\n

Nguy\u1ec5n Ki\u00ean C\u01b0\u1eddng, \u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e0, Ki\u1ec1u Ph\u01b0\u01a1ng Anh <\/b><\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9<\/i><\/p>\n

\u00a0T\u00d3M T\u1eaeT <\/b><\/p>\n\n\n\n\n
B\u00e0i b\u00e1o gi\u1edbi thi\u1ec7u k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 ph\u00e2n b\u1ed1, k\u1ef9 thu\u1eadt gieo \u01b0\u01a1m v\u00e0 k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1ea5u t\u00eda (<\/b>Sandoricum indicum <\/i>Cav) <\/b>t\u1ea1i v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. V\u1ec1 ph\u00e2n b\u1ed1, S\u1ea5u t\u00eda m\u1ecdc t\u1ef1 nhi\u00ean \u1edf t\u1ea5t c\u1ea3 c\u00e1c r\u1eebng t\u1ef1 nhi\u00ean v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 v\u00e0 \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u00e2n t\u00e1n trong c\u00e1c v\u01b0\u1eddn s\u01b0u t\u1eadp th\u1ef1c v\u1eadt. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u gieo \u01b0\u01a1m cho th\u1ea5y, h\u1ea1t gi\u1ed1ng c\u1ea7n \u0111\u01b0\u1ee3c gieo \u01b0\u01a1m ngay sau khi thu h\u00e1i. Ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n h\u1ea1t t\u1ed1t nh\u1ea5t l\u00e0 b\u1ea3o qu\u1ea3n l\u1ea1nh \u1edf nhi\u1ec7t \u0111\u1ed9 4oC, s\u1ebd c\u00f3 th\u1eddi gian b\u1ea3o qu\u1ea3n t\u1ed1i \u0111a \u0111\u01b0\u1ee3c 5 th\u00e1ng v\u1edbi t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u00f2n 15%. Ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd h\u1ea1t b\u1eb1ng ng\u00e2m trong n\u01b0\u1edbc \u1edf nhi\u1ec7t \u0111\u1ed9 th\u00f4ng th\u01b0\u1eddng (22oC) 24 gi\u1edd cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m t\u1ed1t nh\u1ea5t. Gieo \u01b0\u01a1m t\u1ea1o c\u00e2y con v\u1edbi h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u 50% \u0111\u1ea5t + 40% x\u01a1 d\u1eeba + 10% ph\u00e2n h\u1eefu c\u01a1 vi sinh v\u00e0 kh\u00f4ng che s\u00e1ng cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t sau 11 th\u00e1ng gieo \u01b0\u01a1m. V\u1ec1 tr\u1ed3ng r\u1eebng, sau 3 n\u0103m t\u1ef7 l\u1ec7 s\u1ed1ng \u1edf t\u1ea5t c\u1ea3 c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m \u0111\u1ea1t tr\u00ean 96%. Sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh (D1.3) v\u00e0 chi\u1ec1u cao v\u00fat ng\u1ecdn (Hvn) \u0111\u1ea1t l\u1ea7n l\u01b0\u1ee3t l\u00e0 12cm v\u00e0 8,3m; t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n (D1.3) v\u00e0 (Hvn) \u0111\u1ea1t l\u1ea7n l\u01b0\u1ee3t l\u00e0 4 cm\/n\u0103m, 2,8 m\/n\u0103m. \u1ede tu\u1ed5i n\u00e0y, m\u1eadt \u0111\u1ed9 \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a S\u1ea5u t\u00eda: m\u1eadt \u0111\u1ed9 833 c\u00e2y\/ha l\u00e0 th\u00edch h\u1ee3p nh\u1ea5t. B\u00f3n l\u00f3t 300g NPK(16:16:8) v\u00e0 150g ph\u00e2n h\u1eefu c\u01a1 vi sinh cho c\u00e2y sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t. Tr\u1ed3ng h\u1ed7n giao v\u1edbi Sao \u0111en sinh tr\u01b0\u1edfng k\u00e9m h\u01a1n so v\u1edbi tr\u1ed3ng thu\u1ea7n lo\u00e0i. V\u1edbi kh\u1ea3 n\u0103ng th\u00edch nghi cao v\u00e0 sinh tr\u01b0\u1edfng nhanh S\u1ea5u t\u00eda c\u00f3 nhi\u1ec1u ti\u1ec1m n\u0103ng \u0111\u1ec3 tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t g\u1ed7 l\u1edbn.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>S\u1ea5u t\u00eda, g\u1ed7 l\u1edbn, \u0110\u00f4ng Nam B\u1ed9<\/p>\n

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Silvicultural characteristics and planting techniques of Sandoricum indicum Cav for sawlog production in Southeastern Vietnam <\/b><\/p>\n

This paper presents research results on the natural distribution, seedling production and planting techniques of Sandoricum indicum <\/i>Cav in the Southeast region Vietnam. Sandoricum indicum <\/i>naturally grows in natural forests Southeast Vietnam and was planted scatteredly as urban trees, in several arboretum and botanical garden. For seedling production, seeds should be sown immediately after harvest nursery. The best method of seed storage is storing in cold storage at a temperature of 4oC, which can retain seed longevity up to 5 months with 15% of germination rate. The best germination method is immersion in water at normal temperature (22oC) for 24 hours. Seedling growth rate at 11 month – old is highest in the mixed potting substrate of 50% soil + 40% coconut fiber + 10% bio – fertilizer and without shading. Planting trial results show that, at 3 year – old, survival rates in all treatments were over 96%. Tree diameter (DBH) and total height (Hvn) growth reached 12 cm and 8.3m, respectively; Annual DBH and Hvn increment were 4cm and 2.8 m\/year. At this age, the planting space has affected the growth of S. indicum<\/i>; planting density of 833 trees\/ha performed most appropriate. Applying 150g NPK + 300g bio – fertilizer at planting show the highest growth rate. Growth rate of S. indicum <\/i>in the mixture of S. indicum <\/i>+ Hopea odorata <\/i>was lower than in pure planting of Sandoricum indicum<\/i>. With highly adaptable to the site conditions in Southeast Vietnam and rapid growth ability, S. indicum <\/i>is a potential species for sawlog production.<\/p>\n

Keywords: <\/b>Sandoricum indicum <\/i>Cav, sawlog, Southeastern<\/p>\n

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K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT TR\u1ed2NG R\u1eeaNG B\u1edcI L\u1edcI V\u00c0NG (Litsea pierrei <\/i>Lecomte) T\u1ea0I V\u00d9NG \u0110\u00d4NG NAM B\u1ed8<\/b><\/p>\n

Nguy\u1ec5n Anh Tu\u1ea5n1, Nguy\u1ec5n Ho\u00e0ng Ti\u1ec7p2<\/b><\/p>\n

\u00a0<\/b>1Trung t\u00e2m NCTN L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9 – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 2Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u c\u1ee7a \u0111\u1ec1 t\u00e0i c\u01a1 s\u1edf v\u1ec1 “Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng B\u1eddi l\u1eddi v\u00e0ng t\u1ea1i v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean” tri\u1ec3n khai t\u1ea1i v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean trong giai \u0111o\u1ea1n 2010 – 2015 \u0111\u00e3 cho th\u1ea5y, h\u1ea1t gi\u1ed1ng B\u1eddi l\u1eddi v\u00e0ng c\u1ea7n \u0111\u01b0\u1ee3c gieo t\u1ea1o ngay sau khi thu h\u00e1i, tr\u01b0\u1edbc khi gieo h\u1ea1t c\u1ea7n \u0111\u01b0\u1ee3c ng\u00e2m trong n\u01b0\u1edbc \u1ea5m 2 s\u00f4i 3 l\u1ea1nh v\u1edbi th\u1eddi gian ng\u00e2m 18 ti\u1ebfng. C\u00e2y con sinh tr\u01b0\u1edfng t\u1ed1t trong th\u00e0nh ph\u1ea7n h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u v\u1edbi t\u1ef7 l\u1ec7 x\u01a1 d\u1eeba kho\u1ea3ng 40% v\u00e0 kh\u00f4ng c\u1ea7n che s\u00e1ng \u1edf giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m. \u0110\u1ed1i v\u1edbi tr\u1ed3ng r\u1eebng th\u00ec li\u1ec1u l\u01b0\u1ee3ng ph\u00e2n b\u00f3n l\u00f3t 150gr Vi sinh S\u00f4ng Gianh v\u00e0 250gr NPK, m\u1eadt \u0111\u1ed9 c\u00e2y tr\u1ed3ng l\u00e0 830 c\u00e2y\/ha l\u00e0 ph\u00f9 h\u1ee3p. Sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng B\u1eddi l\u1eddi v\u00e0ng \u1edf th\u1eddi \u0111i\u1ec3m 36 th\u00e1ng tu\u1ed5i \u0111\u1ea1t \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n D1.3 = 11,1cm v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n Hvn = 8,2m, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng h\u00e0ng n\u0103m l\u00e0 3,4 cm\/n\u0103m v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 2,5 m\/n\u0103m v\u1ec1 chi\u1ec1u cao v\u00e0 n\u0103ng su\u1ea5t \u0111\u1ea1t 11 m3\/ha\/n\u0103m. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd g\u00f3p ph\u1ea7n v\u00e0o ph\u00e1t tri\u1ec3n tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7 l\u1edbn nh\u1eb1m \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u t\u00e1i c\u01a1 c\u1ea5u ng\u00e0nh l\u00e2m nghi\u1ec7p.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>B\u1eddi l\u1eddi v\u00e0ng, k\u1ef9 thu\u1eadt gieo \u01b0\u01a1m, tr\u1ed3ng r\u1eebng<\/p>\n

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The study of plantation technique for Litsea pierrei Lecomte in Southeastern of Vietnam <\/b><\/p>\n

The intial result of this research \u201cResearch on characteristics silviculture and reforestation techniques Litsea pierrei <\/i>in the Southeastern and Highlands\u201d, that was taken in Southeastern and Hightland areas in 2010 – 2015 period, the result showed that: seed of Litsea pierrei <\/i>should be sowed immediately after harvest with pretreatment in warm water (40oC) at 18 hours. The seedlings in nursery were growth well with mixtured bag of 40% soil, 20% organic fertilizer and 40% coconut fiber without solar shading. In Litsea pierrei <\/i>plantation research, using 150gr Song Giang organic fertilizer and 250gr NPK with density of 830 trees\/hecta were suitable for growth. At 36 months old of Litsea pierrei, <\/i>the average growth of diameter at breast height was 11.1cm and the average growth of height was 8.2 m that mean average increment were 3.4 cm\/year for diameter at breast height and 2.5 m\/year for height of tree; and increment volumn was 11 m3\/ha\/year. This research result will be contribution and development of commerce plantation in supplying sawlog, that was suitable in forestry restructure.<\/p>\n

Keywords: <\/b>Litsea pierrei <\/i>Lecomte, <\/i>sowing, plantation technique<\/p>\n

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TH\u1ef0C TR\u1ea0NG V\u00c0 GI\u1ea2I PH\u00c1P PH\u00c1T TRI\u1ec2N B\u1ec0N V\u1eeeNG R\u1eeaNG PH\u00d2NG H\u1ed8 VEN BI\u1ec2N T\u1ec8NH B\u1ea0C LI\u00caU<\/b><\/p>\n

Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t1, L\u00ea Thanh Quang1, Nguy\u1ec5n B\u1eafc V\u01b0\u01a1ng2, Ph\u1ea1m Minh To\u1ea1i3<\/b><\/p>\n

1Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 2Chi c\u1ee5c Ki\u1ec3m L\u00e2m t\u1ec9nh B\u1ea1c Li\u00eau <\/i><\/p>\n

3Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng ph\u00f2ng h\u1ed9 ven bi\u1ec3n c\u1ee7a t\u1ec9nh B\u1ea1c Li\u00eau \u0111\u1ebfn n\u0103m 2015 l\u00e0 4.258,3ha, trong \u0111\u00f3 3.138,6 \u0111\u1ea5t c\u00f3 r\u1eebng v\u00e0 1.119,6ha \u0111\u1ea5t ch\u01b0a c\u00f3 r\u1eebng v\u00e0 \u0111\u1ea5t b\u00e3i b\u1ed3i quy ho\u1ea1ch cho tr\u1ed3ng r\u1eebng. Ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng b\u1ecb suy tho\u00e1i nghi\u00eam tr\u1ecdng do c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd b\u1ea3o v\u1ec7 r\u1eebng, c\u00f4ng t\u00e1c giao kho\u00e1n r\u1eebng v\u00e0 \u0111\u1ea5t r\u1eebng c\u00f2n nhi\u1ec1u b\u1ea5t c\u1eadp, qu\u00e1 tr\u00ecnh s\u1ea1t l\u1edf v\u00e0 x\u00e2m th\u1ef1c b\u1edd bi\u1ec3n di\u1ec5n ra ph\u1ee9c t\u1ea1p v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt t\u00e1c \u0111\u1ed9ng \u0111\u1ec3 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng ch\u01b0a \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ed3ng b\u1ed9. Hi\u1ec7n tr\u1ea1ng r\u1eebng g\u1ed3m c\u00f3 1.512,7ha r\u1eebng t\u1ef1 nhi\u00ean v\u00e0 1.625,9ha r\u1eebng tr\u1ed3ng k\u1ebft h\u1ee3p nu\u00f4i th\u1ee7y s\u1ea3n v\u1edbi c\u00e1c lo\u00e0i c\u00e2y ch\u1ee7 y\u1ebfu l\u00e0 \u0110\u01b0\u1edbc \u0111\u00f4i, M\u1eafm bi\u1ec3n, C\u00f3c tr\u1eafng, Phi lao, D\u00e0 v\u00f4i, Tra b\u1ed3 \u0111\u1ec1 v\u00e0 D\u1eeba n\u01b0\u1edbc. So v\u1edbi n\u0103m 2000, di\u1ec7n t\u00edch r\u1eebng v\u00e0 \u0111\u1ea5t r\u1eebng ph\u00f2ng h\u1ed9 ven t\u1ec9nh B\u1ea1c Li\u00eau gi\u1ea3m 1.176,7ha, trong \u0111\u00f3 di\u1ec7n t\u00edch \u0111\u1ea5t c\u00f3 r\u1eebng gi\u1ea3m 724,86ha do qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i sang nu\u00f4i tr\u1ed3ng th\u1ee7y s\u1ea3n, do r\u1eebng b\u1ecb suy tho\u00e1i v\u00e0 s\u1ea1t l\u1edf b\u1edd bi\u1ec3n ng\u00e0y c\u00e0ng nghi\u00eam tr\u1ecdng. Qu\u00e1 tr\u00ecnh x\u00f3i l\u1edf b\u1edd bi\u1ec3n t\u1eeb n\u0103m 1995 – 2015 \u0111\u00e3 l\u00e0m m\u1ea5t \u0111i 718,1ha, b\u00ecnh qu\u00e2n m\u1ed7i n\u0103m m\u1ea5t \u0111i kho\u1ea3ng 36ha r\u1eebng v\u00e0 \u0111\u1ea5t r\u1eebng. C\u00e1c gi\u1ea3i ph\u00e1p \u0111\u1ec3 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng r\u1eebng ph\u00f2ng h\u1ed9 ven bi\u1ec3n c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft l\u00e0: (1) t\u0103ng c\u01b0\u1eddng c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd b\u1ea3o v\u1ec7 r\u1eebng, ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd vi\u1ec7c nu\u00f4i tr\u1ed3ng th\u1ee7y s\u1ea3n tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ea5t giao kho\u00e1n cho t\u1ed5 ch\u1ee9c, c\u00e1 nh\u00e2n v\u00e0 h\u1ed9 gia \u0111\u00ecnh; (ii) \u0111\u1ea9y m\u1ea1nh khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh r\u1eebng, ph\u00e1t tri\u1ec3n tr\u1ed3ng r\u1eebng tr\u00ean \u0111\u1ea5t tr\u1ed1ng, b\u00e3i b\u1ed3i, nh\u1eefng n\u01a1i \u0111ang s\u1ea1t l\u1edf v\u00e0 c\u00f3 nguy c\u01a1 s\u1ea1t l\u1edf cao; (iii) \u00e1p d\u1ee5ng c\u00e1c gi\u1ea3i ph\u00e1p l\u00e2m sinh v\u1ec1 t\u1ec9a th\u01b0a nu\u00f4i d\u01b0\u1ee1ng \u0111\u1ec3 ch\u1ed1ng suy tho\u00e1i r\u1eebng; (iv) tri\u1ec3n khai d\u1ef1 \u00e1n b\u1ed1 tr\u00ed s\u1eafp x\u1ebfp l\u1ea1i d\u00e2n c\u01b0 \u1edf khu v\u1ef1c r\u1eebng ph\u00f2ng h\u1ed9 xung y\u1ebfu ven bi\u1ec3n t\u1ec9nh B\u1ea1c Li\u00eau v\u00e0 \u0111\u1ec1 \u00e1n b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng ven bi\u1ec3n \u1ee9ng ph\u00f3 v\u1edbi bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu giai \u0111o\u1ea1n 2015 – 2020; (v) nghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n d\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng r\u1eebng, du l\u1ecbch sinh th\u00e1i, \u0111i\u1ec7n gi\u00f3,… \u0111\u1ec3 t\u1ea1o ngu\u1ed3n thu cho b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng c\u1ee7a t\u1ec9nh.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng, r\u1eebng ph\u00f2ng h\u1ed9 ven bi\u1ec3n, r\u1eebng ng\u1eadp m\u1eb7n<\/p>\n

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Status and solution for sustainable development of the coastal protection forests in Bac Lieu province <\/b><\/p>\n

The results showed that the total area of coastal protection forest of Bac Lieu is 4,258.3ha; of which 3,138.6ha was forest – covered – land area and 1,119.6ha non – covered land area. The forests degredation was observed as a result of the shortcomings in forest management, forestland allocation and servere shoreline erosion. In addition, technical sollutions that help increase forest quality has not been systematically applied. Forest cover status of Bac Lieu was 1,512.7ha of natural forest and 1,625.9ha aquaculture – combined – plantation with some main species such as: Rhizophora apiculata, Avicennia marina<\/i>, Excoecaria agallocha, Casuarina, Ceriops tagal, Thespesia populnea <\/i>and Nypa fruticans. <\/i>Manggrove forest and forest land of Bac Lieu province experienced a downward trend during the period 2000 – 2015. Particularly, forest – covered – land area reduced about 724,86ha, as a result of land convertion for aquaculture, forest degredation and severe coastline erosion. Especially, from 1995 – 2015, servere coastline erosion caused losing of 718,1ha forest and forest land, average 36ha per year. Sollutions bettering sustainable forest development should be implemented such as: (i) enhancing forest management and forest protection, strickly control aquaculture conducted in allocated forestland area or contract – based allocation of forest land to households and individuals; (ii) Improving forest regeneration, plantation expansion on uncovered land and erosion areas; (iii) Appling cultural practices in terms of thinning to prevent forest from degredation; (iv) Implementing the project called \u201cprotection and development coastal forests adapting to climate change for the period 2015 – 2020; (v) Developing forest payment service, eco – tourism, windy based electricity plants, to name a few, in order to financially contribute to forest protection program of the province in a long run.<\/p>\n

Keywords: <\/b>Forest sustainable management, coastal protection forests, mangrove forest<\/p>\n

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\u1ee8NG D\u1ee4NG GIS \u0110\u1ec2 D\u1ef0 B\u00c1O NHANH SINH TR\u01af\u1edeNG R\u1eeaNG TR\u1ed2NG TH\u00d4NG BA L\u00c1 (Pinus kesiya <\/i>Royle ex Gordon) V\u00d9NG NGUY\u00caN LI\u1ec6U GI\u1ea4Y T\u00c2N MAI T\u1ec8NH L\u00c2M \u0110\u1ed2NG<\/b><\/p>\n

\u00a0Ph\u00f9ng V\u0103n Khen1, Ph\u1ea1m Tr\u1ecbnh H\u00f9ng2 <\/b><\/p>\n

1Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 2Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Tp H\u1ed3 Ch\u00ed Minh<\/i><\/p>\n<\/div>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Trong l\u00e2m nghi\u1ec7p c\u00f4ng ngh\u1ec7 GIS \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u00ec t\u00ednh hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3 trong vi\u1ec7c qu\u1ea3n l\u00fd, b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n t\u00e0i nguy\u00ean thi\u00ean nhi\u00ean. D\u1ef1a tr\u00ean kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch kh\u00f4ng gian, th\u00f4ng tin v\u1ec1 v\u1ecb tr\u00ed k\u1ebft h\u1ee3p v\u1edbi c\u00e1c th\u00f4ng tin thu\u1ed9c t\u00ednh li\u00ean h\u1ec7 h\u00ecnh th\u00e0nh n\u00ean c\u00e1c v\u00f9ng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m \u0111\u1ecba l\u00fd – kinh t\u1ebf – x\u00e3 h\u1ed9i kh\u00e1c nhau, \u0111i\u1ec1u n\u00e0y gi\u00fap cho vi\u1ec7c quy ho\u1ea1ch v\u00e0 qu\u1ea3n l\u00fd t\u00e0i nguy\u00ean c\u00f3 hi\u1ec7u qu\u1ea3 t\u1eeb nh\u1eefng th\u00f4ng tin ch\u00ednh x\u00e1c v\u00e0 trung th\u1ef1c B\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p n\u1ed9i suy v\u00e0 l\u1eadp b\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 m\u01b0a l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c thi\u1ebft l\u1eadp m\u1ed9t m\u00f4 h\u00ecnh \u0111a bi\u1ebfn d\u1ef1 b\u00e1o n\u0103ng su\u1ea5t c\u1ee7a Th\u00f4ng ba l\u00e1 cho khu v\u1ef1c nghi\u00ean c\u1ee9u thu\u1ed9c ba huy\u1ec7n B\u1ea3o L\u00e2m, Di Linh v\u00e0 \u0110\u1ee9c Tr\u1ecdng c\u1ee7a t\u1ec9nh L\u00e2m \u0110\u1ed3ng. \u0110\u1ec3 c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh \u0111a bi\u1ebfn, nghi\u00ean c\u1ee9u c\u0169ng \u0111\u00e3 t\u00ecm hi\u1ec3u m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c nh\u00e2n t\u1ed1 sinh th\u00e1i v\u1edbi n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1 l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng m\u00e3 hi\u1ec7u c\u00e1c bi\u1ebfn sinh th\u00e1i tr\u01b0\u1edbc khi thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh \u0111a bi\u1ebfn: Y = 10,0177 – 0,17205*x2x4 – 0,00184111*x3x7 + 0,00796191*x5^3 – 1,64714*1\/x1 – 0,000639912*x6. (Trong \u0111\u00f3 Y l\u00e0 tr\u1eef l\u01b0\u1ee3ng r\u1eebng, x1: Lo\u1ea1i \u0111\u1ea5t; x2: \u0111\u1ed9 d\u00e0y t\u1ea7ng \u0111\u1ea5t; x3: th\u00e0nh ph\u1ea7n c\u01a1 gi\u1edbi; x4: \u0111\u1ed9 d\u1ed1c \u0111\u1ecba h\u00ecnh; x5: tu\u1ed5i c\u00e2y r\u1eebng; x6: \u0111\u1ed9 cao so v\u1edbi m\u1eb7t n\u01b0\u1edbc bi\u1ec3n; x7: l\u01b0\u1ee3ng m\u01b0a trung b\u00ecnh n\u0103m), \u0111\u01b0\u1ee3c ch\u1ea1y tr\u00ean ph\u1ea7n m\u1ec1m Vecticalmaper n\u1ec1n MapInfo t\u1ea1o ra b\u1ea3n \u0111\u1ed3 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng th\u00f4ng ba l\u00e1 t\u1eeb tu\u1ed5i 5 \u0111\u1ebfn tu\u1ed5i 10 cho to\u00e0n khu v\u1ef1c nghi\u00ean c\u1ee9u. B\u1ea3n \u0111\u1ed3 n\u00e0y s\u1ebd gi\u00fap cho c\u00e1c nh\u00e0 qu\u1ea3n l\u00fd, ch\u1ee7 r\u1eebng \u01b0\u1edbc t\u00ednh \u0111\u01b0\u1ee3c tr\u1eef l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng theo tu\u1ed5i \u1ee9ng v\u1edbi m\u1ed7i v\u1ecb tr\u00ed bi\u1ebft \u0111\u01b0\u1ee3c tr\u00ean b\u1ea3n \u0111\u1ed3. \u0110\u00e2y s\u1ebd l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 t\u00ednh to\u00e1n xu\u1ea5t \u0111\u1ea7u t\u01b0 nh\u1eb1m \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao trong kinh doanh r\u1eebng tr\u1ed3ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>GIS, m\u00f4 h\u00ecnh sinh tr\u01b0\u1edfng, n\u1ed9i suy m\u01b0a, Th\u00f4ng ba l\u00e1, Pinus kesiya<\/i><\/p>\n

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Application GIS for rapid prediction in grwoth of P<\/i>inus kesiya Royle ex Gordon plantations in Tan Mai paper mill area, Lam Dong province <\/b><\/p>\n

Global Information System (GIS) is commomly used in forestry because of its efficiency in natural resource development, protection and management. Based on space analysis, informations of position and location related to informations of establishing regions containing different characteristics in geography, economy and society. These accurate informations can be used to make planning and managing natural resources proficiently. This study can be allowed to determine an interpolated method serving to build the distributed rainfall map for the study area before the establishment of distributed rainfall map as a basic for establishing a multi – variable model predicting the productivity of Pinus kesiya <\/i>plantations on the study area belong to the Bao Lam, Di Linh and Duc Trong districts, Lam Dong province. To be able to establish the multi – variable model, the study also explored the relationship between each ecological factor and the productivity of Pinus kysia <\/i>plantation as the basic for building the code system for ecological variables before setting up the model. Multi – variable model was calculated: Y= 10,0177 – 0,17205*x2x4 – 0,00184111*x3x7 + 0,00796191*x5^3 – 1,64714*1\/x1 – 0,000639912*x6 where Y = yield; x1 = soil type; x2 = soil depth; x3 = soil texture; x4 = slope; x5 = tree age; x6 = sea level; and x7 = precipitation, run by MapInfo software using Vecticalmaper sofware tool produced map of productivity for Pinus kesiya <\/i>plantations with ages from age 5 to age 10 years. Forest managers and owners can be used the productivity Map to fast predict productivity of forest plantations when they know the point in the Map. Therefore, this can evaluate benefit from plantations.<\/p>\n

Keywords: <\/b>GIS, growth models, interpolation rain, Pinus kesiya<\/i><\/p>\n

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PH\u00c2N T\u00cdCH KH\u1ea2 N\u0102NG C\u1ea0NH TRANH KINH T\u1ebe C\u1ee6A R\u1eeaNG TR\u1ed2NG KEO L\u00c1 TR\u00c0M \u00c1P D\u1ee4NG TI\u1ebeN B\u1ed8 K\u1ef8 THU\u1eacT \u1ede V\u00d9NG \u0110\u00d4NG NAM B\u1ed8<\/b><\/p>\n

Tr\u1ea7n Thanh Cao, Ph\u1ea1m Th\u1ebf D\u0169ng, Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t, V\u0169 \u0110\u00ecnh H\u01b0\u1edfng <\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n

\u00a0T\u00d3M T\u1eaeT <\/b><\/p>\n\n\n\n\n
Keo l\u00e1 tr\u00e0m (Acacia auriculiformis <\/i>A. Cunn. ex Benth) <\/b>l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 l\u1ef1c \u1edf v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 nh\u1eb1m cung c\u1ea5p ngu\u1ed3n nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m v\u00e0 g\u1ed7 x\u1ebb. B\u00e0i vi\u1ebft \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ma tr\u1eadn ph\u00e2n t\u00edch ch\u00ednh s\u00e1ch (PAM) v\u00e0 c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 t\u00e0i ch\u00ednh \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 l\u01b0\u1ee3ng h\u00f3a nh\u1eefng l\u1ee3i th\u1ebf n\u00e0y c\u1ee7a r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 r\u00f5: C\u00e1c ch\u1ec9 s\u1ed1 ph\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 t\u00e0i ch\u00ednh \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ee7 theo chi ph\u00ed gi\u00e1 x\u00e3 h\u1ed9i trong tr\u1ed3ng r\u1eebng Keo l\u00e1 tr\u00e0m chu k\u1ef3 kinh doanh r\u1eebng 8 n\u0103m c\u00f3 \u00e1p d\u1ee5ng k\u1ef9 thu\u1eadt qu\u1ea3n l\u00fd l\u1eadp \u0111\u1ecba th\u00ec l\u1ee3i nhu\u1eadn thu\u1ea7n (NPV) 141,943 tr.\u0111\/ha, t\u1ef7 su\u1ea5t sinh l\u1ee3i n\u1ed9i b\u1ed9 (IRR) l\u00e0 33% v\u00e0 t\u1ef7 su\u1ea5t l\u1ee3i \u00edch tr\u00ean chi ph\u00ed (BCR) 3,19. K\u1ebft h\u1ee3p v\u1edbi ph\u00e2n t\u00edch kinh t\u1ebf theo ma tr\u1eadn ch\u00ednh s\u00e1ch (PAM), t\u1ef7 l\u1ec7 chi ph\u00ed t\u00e0i nguy\u00ean n\u1ed9i \u0111\u1ecba (DRC) c\u1ee7a r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m l\u00e0 0,3. Ph\u00e2n t\u00edch \u0111\u1ed9 nh\u1ea1y v\u1edbi c\u00e1c k\u1ecbch b\u1ea3n gi\u00e1 g\u1ed7 v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng gi\u1ea3m \u0111\u1ed3ng th\u1eddi \u0111\u1ebfn 40% th\u00ec DRC v\u1eabn nh\u1ecf h\u01a1n 1. \u0110i\u1ec1u n\u00e0y kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng, bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00e0 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt quan tr\u1ecdng n\u00e2ng cao l\u1ee3i th\u1ebf c\u1ea1nh tranh c\u1ea3 v\u1ec1 kinh t\u1ebf v\u00e0 t\u00e0i ch\u00ednh r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m c\u1ee7a V\u00f9ng \u0110\u00f4ng Nam B\u1ed9.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Hi\u1ec7u qu\u1ea3, Keo l\u00e1 tr\u00e0m, l\u1ee3i th\u1ebf so s\u00e1nh<\/p>\n

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Nalyzing economic competitive advantage of Acacia auriculiformis plantations applied advanced techniques in South Eastern region <\/b><\/p>\n

Acacia auriculiformis <\/i>plantations are widely planted in the South – Eastern Vietnam for wood chip and saw – log productions. This paper was used the method of the policy analysis matrix (PAM) and evaluation of financial index to analyze competitive advantage of A. auriculiformis <\/i>plantations. The results showed that analysis index of financial effect with full social costs for A. auriculiformis <\/i>plantations with rotation of eight years when applying site management led to net present value (NPV) was 141.943 milion VND ha – 1, internal rate of return (IRR) was 33.0% and benefit – cost ratio (BCR) was 3.19. When combining with PAM, domestic recourse cost (DRC) of A. auriculiformis <\/i>plantations was 0.3. In the case of timber prices and productivity reduced together to 40%, the DRC was less than 1. It was concluded that A. auriculiformis <\/i>plantations in Southeastern Vietnam achieved high economic efficiency and competitive advantage when applying optimum sylvicultural practice and site management<\/p>\n

Keywords: <\/b>Effect, Acacia auriculiformis<\/i>, competitive advantage<\/p>\n

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N\u0102NG SU\u1ea4T V\u00c0 HI\u1ec6U QU\u1ea2 KINH T\u1ebe R\u1eeaNG TR\u1ed2NG KEO LAI T\u1ea0I V\u00d9NG \u0110\u1ea4T NG\u1eacP L\u1ee2 CHUA PH\u00c8N T\u1ec8NH C\u00c0 MAU<\/b><\/p>\n

Ng\u00f4 V\u0103n Ng\u1ecdc1, V\u00f5 Ng\u01b0\u01a1n Th\u1ea3o2<\/b><\/p>\n

\u00a0<\/b>1Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 2 Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p T\u00e2y Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

K\u1ebf th\u1eeba hi\u1ec7n tr\u01b0\u1eddng c\u1ee7a D\u1ef1 \u00e1n \u201cX\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh s\u1ea3n xu\u1ea5t th\u1eed nghi\u1ec7m tr\u1ed3ng r\u1eebng keo lai (<\/i>Acacia hybrid) <\/i>b\u1eb1ng c\u00e1c d\u00f2ng c\u00f3 n\u0103ng su\u1ea5t cao \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn tr\u00ean v\u01b0\u1eddn c\u00e2y t\u1ea1p v\u00e0 b\u1edd bao v\u00f9ng r\u1eebng tr\u00e0m b\u00e1n \u0111\u1ea3o C\u00e0 Mau\u201d t\u1eeb th\u00e1ng 01\/2009 \u0111\u1ebfn th\u00e1ng 12\/2014. D\u1ef1 \u00e1n \u0111\u00e3 tr\u1ed3ng th\u1eed nghi\u1ec7m tr\u00ean 2 d\u1ea1ng \u0111\u1ea5t (\u0111\u1ea5t b\u1edd bao khu\u00f4n h\u1ed9 v\u00e0 \u0111\u1ea5t l\u00ean l\u00edp m\u1edbi) v\u1edbi 2 lo\u1ea1i m\u1eadt \u0111\u1ed9 (1.660 c\u00e2y\/ha v\u00e0 2.000 c\u00e2y\/ha) v\u00e0 7 d\u00f2ng keo lai tr\u1ed3ng ri\u00eang r\u1ebd (TB10; TB11; TB12; BV32; BV33; AH1 v\u00e0 AH7). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y r\u1eebng tr\u1ed3ng th\u1eed nghi\u1ec7m c\u00e1c d\u00f2ng keo lai sau 5 tu\u1ed5i \u0111\u1ec1u cho n\u0103ng su\u1ea5t cao, trong \u0111\u00f3 d\u00f2ng AH7 c\u00f3 n\u0103ng su\u1ea5t cao nh\u1ea5t tr\u00ean c\u1ea3 2 d\u1ea1ng \u0111\u1ea5t v\u00e0 2 lo\u1ea1i m\u1eadt \u0111\u1ed9. N\u0103ng su\u1ea5t tr\u00ean b\u1edd bao khu\u00f4n h\u1ed9 \u1edf 2 lo\u1ea1i m\u1eadt \u0111\u1ed9 (1.660 c\u00e2y\/ha v\u00e0 2.000 c\u00e2y\/ha) \u0111\u1ea1t \u2248 41,7 m3\/ha\/n\u0103m v\u00e0 38,3 m3\/ha\/n\u0103m, tr\u00ean \u0111\u1ea5t l\u00edp m\u1edbi x\u00e2y d\u1ef1ng t\u01b0\u01a1ng \u1ee9ng v\u1edbi 2 lo\u1ea1i m\u1eadt \u0111\u1ed9 \u0111\u1ea1t \u2248 41,4 m3\/ha\/n\u0103m v\u00e0 46,3 m3\/ha\/n\u0103m. Sau 5 n\u0103m tr\u1ed3ng hi\u1ec7u qu\u1ea3 kinh t\u1ebf cao nh\u1ea5t l\u00e0 d\u00f2ng keo lai AH7, tr\u00ean b\u1edd bao khu\u00f4n h\u1ed9 m\u1eadt \u0111\u1ed9 tr\u1ed3ng 1.600 c\u00e2y\/ha c\u00f3 ch\u1ec9 s\u1ed1 NPV \u2248 34,125 tri\u1ec7u \u0111\u1ed3ng, IRR \u2248 41% v\u00e0 ch\u1ec9 s\u1ed1 BCR \u2248 2,4 l\u1ea7n; tr\u00ean \u0111\u1ea5t l\u00ean l\u00edp m\u1edbi \u1edf m\u1eadt \u0111\u1ed9 2.000 c\u00e2y\/ha c\u00f3 ch\u1ec9 s\u1ed1 NPV \u2248 31,422 tri\u1ec7u \u0111\u1ed3ng; IRR \u2248 27% v\u00e0 BCR \u2248 1,7 l\u1ea7n. Ph\u00e2n t\u00edch \u0111\u1ed9 nh\u1ea1y c\u1ee7a m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng d\u00f2ng AH7 v\u00e0 BV32 khi s\u1ea3n l\u01b0\u1ee3ng gi\u1ea3m, gi\u00e1 b\u00e1n gi\u1ea3m 15% th\u00ec ch\u1ec9 s\u1ed1 NPV \u2248 9,98 tri\u1ec7u \u0111\u1ed3ng\/ha \u0111\u1ed1i v\u1edbi d\u00f2ng AH7 v\u00e0 798.000 \u0111\u1ed3ng\/ha \u0111\u1ed1i v\u1edbi d\u00f2ng BV32.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>N\u0103ng su\u1ea5t, hi\u1ec7u qu\u1ea3 kinh t\u1ebf keo lai, t\u1ec9nh C\u00e0 Mau<\/p>\n

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Productivity and economic efficiency planting of Acacia hybrid on acid sulphate soil at Ca Mau province <\/b><\/p>\n

This study basing on project site “Establishing model of production planting trial Acacia hybrid high – yield with some clones have been recognized on the household’s garden embankment and new making embankment at Ca Mau peninsula”. from January 2009 to December 2014. Project were planting on two soil types (on the household’s garden embankment and new making embankment) and two density (1.660 trees per hectare and 2.000 trees per hectare) and 7 clones acacia hybrid planted separate (TB10, TB11, TB12, BV32, BV33, AH1 and AH7). Results of study showed that planting of clones acacia hybrid after 5 years were have high yield, of which AH7 clone has highest yield on the both soil types and two density. Productivity on the household’s garden embankment of two density (1.660 trees per hectare and 2.000 trees per hectare) was \u2248 41.7 m3\/hectare\/year and 38.3 m3\/hectare\/year; on new making embankment was \u2248 41.4 m3\/hectare\/year and 46.3 m3\/hectare\/year with two corresponding density. Economic efficiency from plantation of AH7 clone after five year gave a highest profits, on the household’s garden embankment of density 1,660 trees per hectare had NPV \u2248 34,125,000 VN\u0110; IRR \u2248 41% and BCR \u2248 2.4 times; on new making embankment of density 2.000 trees per hectare had NPV \u2248 31.422,000 VN\u0110; IRR \u2248 27% and BCR \u2248 1.7 times. Analysis of sensitivity model planting for clones AH7 and BV32 indicated that if productivity and price reduced 15%, Net Present Value were 9,980,000 VN\u0110\/hectare for clone AH7 and 798,000 VN\u0110\/hectare for clone BV32.<\/p>\n

Keywords: <\/b>Productivity, economic efficiency acacia hybrid, Ca Mau province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P – CHUY\u00caN SAN 2017 K\u1ef7 ni\u1ec7m 40 n\u0103m th\u00e0nh l\u1eadp Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 TS. Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t 1 1. Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng Tr\u00f4m (Sterculia foetida L.) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom v\u00e0 gh\u00e9p c\u00e0nh Ph\u00f9ng V\u0103n Khang Ph\u00f9ng V\u0103n Khen Study propagation of Sterculia […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1550"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=1550"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1550\/revisions"}],"predecessor-version":[{"id":1690,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1550\/revisions\/1690"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}