{"id":1538,"date":"2017-03-09T10:22:09","date_gmt":"2017-03-09T03:22:09","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1538"},"modified":"2023-11-23T12:25:30","modified_gmt":"2023-11-23T05:25:30","slug":"vietnam-journal-of-forest-science-number-4-2016","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2017\/03\/vietnam-journal-of-forest-science-number-4-2016\/","title":{"rendered":"Vietnam Journal of Forest Science Number 4-2016"},"content":{"rendered":"

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

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T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 4 \u2013 2016<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng c\u00e2y H\u1ed3ng di\u1ec7p (Gymnocladus chinensis <\/i>Baill.) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom<\/td>\nV\u0169 Th\u1ecb B\u00edch H\u1eadu V\u00f5 Qu\u1ed1c B\u1ea3o Ph\u1ea1m Th\u1ecb Kim Thoa<\/td>\nA study of Gymnocladus chinensis <\/i>Baill. multiplication using cutting propagation method<\/td>\n4579<\/td>\n<\/tr>\n
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2<\/p>\n

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Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng v\u00e0 k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng V\u00f9 h\u01b0\u01a1ng (Cinnamomum balansae <\/i>H.Lec) t\u1ea1i \u0110oan H\u00f9ng – Ph\u00fa Th\u1ecd<\/td>\nNguy\u1ec5n Minh Thanh \u0110\u00e0o H\u00f9ng M\u1ea1nh<\/td>\nVegetative propagation and planting techniques for Cinnamomum balansae <\/i>H.Lec in Doan Hung, Phu Tho province<\/td>\n4585<\/td>\n<\/tr>\n
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Bi\u1ebfn d\u1ecb v\u00e0 th\u00f4ng s\u1ed1 di truy\u1ec1n c\u1ee7a c\u00e1c d\u00f2ng v\u00f4 t\u00ednh keo lai m\u1edbi ch\u1ecdn l\u1ecdc t\u1ea1i kh\u1ea3o nghi\u1ec7m d\u00f2ng v\u00f4 t\u00ednh \u1edf Y\u00ean Th\u1ebf, B\u1eafc Giang<\/td>\n\u0110\u1ed7 H\u1eefu S\u01a1n H\u00e0 Huy Th\u1ecbnh Nguy\u1ec5n \u0110\u1ee9c Ki\u00ean D\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n Nguy\u1ec5n Qu\u1ed1c To\u1ea3n Tr\u1ecbnh V\u0103n Hi\u1ec7u<\/td>\nGenotypic variation on clones of acacia hybrid at Yen The clonal test<\/td>\n4593<\/td>\n<\/tr>\n
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Ph\u00e2n t\u00edch m\u1ed1i quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c qu\u1ea7n th\u1ec3 S\u01a1n tra (Docynia indica <\/i>(Wall.) Decne) b\u1eb1ng ch\u1ec9 th\u1ecb ISSR<\/td>\nV\u0169 Th\u1ecb Thu Hi\u1ec1n Tr\u1ea7n Th\u1ecb Li\u1ec7u \u0110inh Th\u1ecb Ph\u00f2ng Ph\u00ed H\u1ed3ng H\u1ea3i La \u00c1nh D\u01b0\u01a1ng V\u0169 \u0110\u1ee9c To\u00e0n Delia Catacutan v\u00e0 \u0110\u00e0m Vi\u1ec7t B\u1eafc<\/td>\nAnalysis of genetic diversity between populations of Docynia indica <\/i>(Wall.) Dence by ISSR markers<\/td>\n4603<\/td>\n<\/tr>\n
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Th\u00e0nh ph\u1ea7n lo\u00e0i v\u00e0 ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c lo\u00e0i thu\u1ed9c chi B\u01b0\u1edbm b\u1ea1c (Mussaenda <\/i>L.) \u1edf L\u00e2m \u0110\u1ed3ng<\/td>\nQu\u00e1ch V\u0103n H\u1ee3i V\u0169 Kim C\u00f4ng Tr\u1ea7n Th\u00e1i Vinh H\u2019Yon N\u00ea Bing \u0110\u1eb7ng Th\u1ecb Th\u1eafm Nguy\u1ec5n Th\u1ecb H\u1ed3ng v\u00e0 N\u00f4ng V\u0103n Duy<\/td>\nSpecies composition and distribution of species of the genus Mussaenda <\/i>L. in Lam Dong province<\/td>\n4615<\/td>\n<\/tr>\n
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K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra th\u00e0nh ph\u1ea7n c\u00e1c lo\u00e0i c\u1ee7a h\u1ecd D\u1ebb (Fagaceae) t\u1ea1i Khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Nam Nung, t\u1ec9nh \u0110\u1eafk N\u00f4ng<\/td>\nNguy\u1ec5n Quang H\u01b0ng Tr\u1ecbnh Ng\u1ecdc Bon Ph\u1ea1m V\u0103n Vinh<\/td>\nSurvey results of species composition of Fagaceae in Nam Nung Nature Reserve, Dac Nong province<\/td>\n4625<\/td>\n<\/tr>\n
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7<\/p>\n

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\u0110a d\u1ea1ng sinh h\u1ecdc t\u1ea7ng c\u00e2y g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean khu v\u1ef1c B\u1eafc v\u00e0 Nam \u0110\u00e8o H\u1ea3i V\u00e2n<\/td>\nNinh Vi\u1ec7t Kh\u01b0\u01a1ng Ph\u00f9ng \u0110\u00ecnh Trung Nguy\u1ec5n Minh Thanh<\/td>\nDiversity of forest tree species in natural forest of Hai Van mountain pass<\/td>\n4630<\/td>\n<\/tr>\n
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\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc t\u1ea7ng c\u00e2y g\u1ed7 r\u1eebng ph\u1ee5c h\u1ed3i sau khai th\u00e1c t\u1ea1i Khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean v\u0103n h\u00f3a \u0110\u1ed3ng Nai<\/td>\nPh\u00f9ng \u0110\u00ecnh Trung Tr\u1ea7n L\u00e2m \u0110\u1ed3ng Ph\u1ea1m Quang Tuy\u1ebfn Ninh Vi\u1ec7t Kh\u01b0\u01a1ng Nguy\u1ec5n Th\u1ecb Thu Ph\u01b0\u01a1ng Tr\u1ea7n Ho\u00e0ng Qu\u00fd<\/td>\nStructure and biodiversity of timber layer of logged-over forests in the Dong Nai Culture and Nature Reserve<\/td>\n4637<\/td>\n<\/tr>\n
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Ch\u1ec9 s\u1ed1 ph\u1ee9c t\u1ea1p v\u1ec1 c\u1ea5u tr\u00fac \u0111\u1ed1i v\u1edbi r\u1eebng k\u00edn th\u01b0\u1eddng xanh \u1ea9m nhi\u1ec7t \u0111\u1edbi \u1edf khu v\u1ef1c M\u00e3 \u0110\u00e0 t\u1ec9nh \u0110\u1ed3ng Nai<\/td>\nNguy\u1ec5n V\u0103n Th\u00eam Nguy\u1ec5n Tu\u1ea5n B\u00ecnh<\/td>\nStructural complexity index for tropical moist evergreen close forest in Ma Da zone of Dong Nai province<\/td>\n4646<\/td>\n<\/tr>\n
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10<\/p>\n

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\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u00e1nh s\u00e1ng v\u00e0 th\u00e0nh ph\u1ea7n ru\u1ed9 t b\u1ea7u \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y con S\u01a1n huy\u1ebft (Melanorrhoea laccifera<\/i> Pierre) trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m<\/td>\nNguy\u1ec5n Th\u1ecb Chuy\u1ec1n Tr\u01b0\u01a1ng Tu\u1ea5n Anh Ho\u00e0ng Ti\u1ebfn \u0110\u1ea1i<\/td>\nEffects of light and seedling container medium composition on growth of Melanorrhoea laccifera <\/i>Pierre at the stage of nursery<\/td>\n4655<\/td>\n<\/tr>\n
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11<\/p>\n

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\u1ea2nh h\u01b0\u1edfng c\u1ee7a th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a M\u1eafm bi\u1ec3n (Avicennia marina<\/i> (Forssk) Vierh.), s\u00fa \u0110\u1ecf (Agiceras floridum<\/i> Roem & Schult.), D\u00e0 v\u00f4i (Ceriops tagal<\/i> C.B.Rob.), \u0110\u01b0ng (Rhizophora mucronata<\/i> Lam.), \u0110\u01b0\u1edbc (Rhizophora apiculata<\/i> Blume) v\u00e0 \u0110\u00e2ng (Rhizophora stylosa<\/i> Griff.) trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m t\u1ea1i c\u00e1c \u0111\u1ea3o Nam Trung B\u1ed9 v\u00e0 Nam B\u1ed9<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i Nguy\u1ec5n H\u1ea3i H\u00f2a<\/td>\nEffects of potting component on growth of Avicennia marina<\/i>, Agiceras florium, Ceriops tagal, Rhizophora mucronata, Rhizophora apiculata<\/i> and Rhizophora stylosa<\/i> in nursery at Southern and Centre Southern Islands<\/td>\n4665<\/td>\n<\/tr>\n
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12<\/p>\n

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Hi\u1ec7n tr\u1ea1ng qu\u1ea7n th\u1ec3 D\u1eeba n\u01b0\u1edbc (Nipa fruticans<\/i> Wurmb) t\u1ea1i x\u00e3 Tam Ngh\u0129a, huy\u1ec7n N\u00fai Th\u00e0nh, t\u1ec9nh Qu\u1ea3ng Nam v\u00e0 m\u1ed9t s\u1ed1 \u0111\u1ecbnh h\u01b0\u1edbng qu\u1ea3n l\u00fd b\u1ec1n v\u1eefng t\u00e0i nguy\u00ean<\/td>\nL\u00ea Th\u1ecb \u0110i\u1ec3m S\u01b0\u01a1ng V\u00f5 V\u0103n Minh Nguy\u1ec5n Th\u1ecb Kim Y\u1ebfn<\/td>\nStudy on the status of Nipa palm (Nipa fruticans<\/i> Wurmb) populations in Tam Nghia wards, Nui Thanh district, Quang Nam province and propose solutions for sustainable management of natural resources<\/td>\n4676<\/td>\n<\/tr>\n
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13<\/p>\n

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Nghi\u00ean c\u1ee9u ph\u00e2n lo\u1ea1i c\u00e1c ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng t\u1ea1i khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Na Hang b\u1eb1ng \u1ea3nh v\u1ec7 tinh SPOT 6<\/td>\nPh\u1ea1m Quang Tuy\u1ebfn Ph\u1ea1m Ti\u1ebfn D\u0169ng Nguy\u1ec5n Huy Ho\u00e0ng<\/td>\nResearch of forest vegetation classification on Na Hang nature reserve by SPOT 6 satellite image interpretation<\/td>\n4685<\/td>\n<\/tr>\n
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14<\/p>\n

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Nghi\u00ean c\u1ee9u l\u1eadp bi\u1ec3u th\u1ec3 t\u00edch Th\u00f4ng ba l\u00e1 (Pinus kesiya royle<\/i> Ex.Gordon) \u1edf H\u00e0 Giang<\/td>\nPh\u1ea1m Quang Tuy\u1ebfn B\u00f9i Thanh H\u1eb1ng Tr\u1ea7n Ho\u00e0ng Qu\u00fd Nguy\u1ec5n Th\u1ecb Thu Ph\u01b0\u01a1ng Nguy\u1ec5n Kim Trung Nguy\u1ec5n Quang H\u01b0ng<\/td>\nResearch on volume table establishment of Pinus kesiya<\/i> in Ha Giang<\/td>\n4696<\/td>\n<\/tr>\n
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15<\/p>\n

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Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a 2 lo\u00e0i V\u1ed1i thu\u1ed1c Schima wallichii<\/i> Choisy v\u00e0 Schima superba<\/i> Gardn. Et Champ t\u1ea1i S\u01a1n La v\u00e0 Gia Lai<\/td>\n\u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u L\u00ea Th\u1ecb H\u1ea1nh L\u00f2 Quang Th\u00e0nh<\/td>\nEffects of vegetation treatment on the survival and growth of Schima wallichii<\/i> Choisy and Schima superba<\/i> Gardn. Et Champ in Son La and Gia Lai provinces<\/td>\n4702<\/td>\n<\/tr>\n
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16<\/p>\n

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\u0110\u00e1nh gi\u00e1 nguy c\u01a1 t\u1ed5n th\u01b0\u01a1ng v\u00f9ng ven bi\u1ec3n d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a bi\u1ec3n \u0111\u1ed5i kh\u00ed h\u1eadu t\u1ea1i huy\u1ec7n Th\u00e1i Th\u1ee5y, t\u1ec9nh Th\u00e1i B\u00ecnh<\/td>\nNguy\u1ec5n H\u1ea3i H\u00f2a Tr\u1ea7n Th\u1ecb Thanh T\u00e2m<\/td>\nAssessing coastal vulnerabilities to climate change impacts in Thai Thuy district, Thai Binh province<\/td>\n4710<\/td>\n<\/tr>\n
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17<\/p>\n

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T\u1ea1o r\u1eebng V\u1ed1i thu\u1ed1c b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gieo h\u1ea1t th\u1eb3ng v\u00e0 khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh<\/td>\n\u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u D\u01b0\u01a1ng Quang Trung Tr\u1ea7n Quang Trung<\/td>\nRestoration of Schima wallichii Choisy and Schima superba Gardn. Et Champ forests using assisted natural regeneration and direct sowing<\/td>\n4723<\/td>\n<\/tr>\n
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18<\/p>\n

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S\u00e2u h\u1ea1i ch\u00ednh r\u1eebng tr\u1ed3ng G\u00e1o tr\u1eafng (Neolamerckia cadamba) v\u00e0 G\u00e1o v\u00e0ng (Nauclea orientalia<\/i>) t\u1ea1i t\u1ec9nh C\u00e0 Mau<\/td>\nPh\u1ea1m Quang Thu L\u00ea V\u0103n B\u00ecnh V\u00f5 Ng\u01b0\u01a1n Th\u1ea3o Nguy\u1ec5n Minh Ch\u00ed<\/td>\nMain insect pests damaging Neolamerckia cadamba and Nauclea orientalia plantations in Ca Mau province<\/td>\n4731<\/td>\n<\/tr>\n
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19<\/p>\n

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X\u00e1c \u0111\u1ecbnh \u0111\u1ed3ng th\u1eddi theobromine, theophylline v\u00e0 caffeine trong s\u1ea3n ph\u1ea9m ch\u00e8 \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh ph\u00eda B\u1eafc Vi\u1ec7t Nam b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p s\u1eafc k\u00fd l\u1ecfng hi\u1ec7u n\u0103ng cao (HPLC)<\/td>\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc Ho\u00e0ng Trung Hi\u1ebfu<\/td>\nSimultaneous determination of caffeine, theobromine, and theophylline in some kinds of tea produced in the North Vietnam with using high-performance liquid chromatography (HPLC)<\/td>\n4739<\/td>\n<\/tr>\n
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20<\/p>\n

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\u1ea2nh h\u01b0\u1edfng c\u1ee7a t\u1ef7 l\u1ec7 v\u1ecf c\u00e2y \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u01a1 l\u00fd v\u00e1n composite v\u1ecf c\u00e2y Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/i>)<\/td>\nV\u0169 \u0110\u00ecnh Th\u1ecbnh V\u0169 Huy \u0110\u1ea1i<\/td>\nEffects of bark proportion to physicochemical properties of composite board made from Acacia mangium bark<\/td>\n4749<\/td>\n<\/tr>\n
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21<\/p>\n

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C\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu c\u1ee7a g\u1ed7 Th\u1ecb Diospyros decandra<\/i> Lour.<\/td>\n\u0110\u1ed7 V\u0103n B\u1ea3n Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc B\u00f9i H\u1eefu Th\u01b0\u1edfng<\/p>\n

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Wood anatomy of Diospyros decandra Lour<\/td>\n4754<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG C\u00c2Y H\u1ed2NG DI\u1ec6P (Gymnocladus chinensis <\/i>Baill.) B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P GI\u00c2M HOM<\/b><\/p>\n

V\u0169 Th\u1ecb B\u00edch H\u1eadu1, V\u00f5 Qu\u1ed1c B\u1ea3o1, Ph\u1ea1m Th\u1ecb Kim Thoa2 <\/b><\/p>\n

1S\u1edf Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 th\u00e0nh ph\u1ed1 \u0110\u00e0 N\u1eb5ng 2Khoa M\u00f4i tr\u01b0\u1eddng – \u0110\u1ea1i h\u1ecdc B\u00e1ch Khoa, \u0110\u1ea1i h\u1ecdc \u0110\u00e0 N\u1eb5ng<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

B\u00e0i b\u00e1o tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom t\u1eeb c\u00e0nh b\u00e1nh t\u1ebb tr\u00ean c\u00e2y H\u1ed3ng di\u1ec7p (Gymnocladus chinensis <\/i>Baill.) c\u1ea5y m\u00f4. M\u1eb7c d\u00f9 k\u1ef9 thu\u1eadt gi\u00e2m hom kh\u00f4ng mang l\u1ea1i nh\u1eefng \u01b0u th\u1ebf nh\u01b0 c\u00f4ng ngh\u1ec7 nh\u00e2n gi\u1ed1ng hi\u1ec7n \u0111\u1ea1i, song \u0111\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p d\u1ec5 th\u1ef1c hi\u1ec7n, \u00edt t\u1ed1n k\u00e9m v\u00e0 ch\u00f3ng c\u00f3 s\u1ea3n ph\u1ea9m. Nghi\u00ean c\u1ee9u cho th\u1ea5y, c\u00e0nh b\u00e1nh t\u1ebb H\u1ed3ng di\u1ec7p 12 th\u00e1ng tu\u1ed5i \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng dung d\u1ecbch IAA n\u1ed3ng \u0111\u1ed9 100ppm trong 15 ph\u00fat v\u00e0 \u01b0\u01a1m gi\u00e2m tr\u00ean gi\u00e1 th\u1ec3 t\u1ed5ng h\u1ee3p (4 \u0111\u1ea5t: 2 ph\u00e2n chu\u1ed3ng hoai: 2 tr\u1ea5u hun: 1 x\u01a1 d\u1eeba) cho t\u1ef7 l\u1ec7 hom th\u00e0nh c\u00f4ng cao nh\u1ea5t. K\u1ebft qu\u1ea3 nghi\u1ec7m th\u1ee9c n\u00e0y cho 79% s\u1ed1 hom t\u1ea1o \u0111\u01b0\u1ee3c h\u1ec7 r\u1ec5 kh\u1ecfe m\u1ea1nh, ph\u00e1t sinh nhi\u1ec1u r\u1ec5 th\u1ee9 c\u1ea5p v\u1edbi s\u1ed1 r\u1ec5 trung b\u00ecnh tr\u00ean hom \u0111\u1ea1t 4,15, chi\u1ec1u d\u00e0i trung b\u00ecnh r\u1ec5 \u0111\u1ea1t 7,54cm sau 08 tu\u1ea7n \u01b0\u01a1m gi\u00e2m. Trong t\u01b0\u01a1ng lai khi nhu c\u1ea7u nh\u00e2n gi\u1ed1ng lo\u00e0i H\u1ed3ng di\u1ec7p ph\u00e1t tri\u1ec3n, gi\u00e2m hom c\u0169ng l\u00e0 ph\u01b0\u01a1ng th\u1ee9c h\u1eefu hi\u1ec7u tr\u00ean quy m\u00f4 nh\u00e2n gi\u1ed1ng \u0111\u1ea1i tr\u00e0.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>C\u00e0nh b\u00e1nh t\u1ebb, H\u1ed3ng di\u1ec7p, gi\u00e2m hom, IAA<\/p>\n

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A study of Gymnocladus chinensis <\/i>Baill. multiplication using cutting propagation method <\/b><\/p>\n

This paper presents the results of a cutting propagation method from the tree branch buds of Gymnocladus chinensis <\/i>Baill. tissue. Although the cuttings technique do not have many advantages as modern propagation technologies, but this method is inexpensive, fast and easy to implement, and get product. The research showed that the Gymnocladus chinensis <\/i>Baill. 12 month – old stem shoots could get a highest successful cuttings rate when it was treated with a solution of 100ppm IAA for 15 minutes and nursery cuttings on synthetic substrates (4 soil: 2 cattle manure: 2 husks: 1 fiber coconut). Results of this treatment were 79% of cuttings creating healthy root systems, generating many secondary roots with the average number of cuttings roots at 4.15, and reaching 7.54cm length after 08 weeks of cuttings. This cuttings technique will be an effective method in scale of commercial propagation with the increasing demands of Gymnocladus chinensis <\/i>Baill. species breeding in the future.<\/p>\n

Keywords: <\/i><\/b>Branch buds, cutting proparagation, Gymnocladus chinensis <\/i>Baill., IAA<\/p>\n

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

NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG SINH D\u01af\u1ee0NG V\u00c0 K\u1ef8 THU\u1eacT G\u00c2Y TR\u1ed2NG V\u00d9 H\u01af\u01a0NG (Cinnamomum balansae <\/i>H.Lec) T\u1ea0I \u0110OAN H\u00d9NG – PH\u00da TH\u1ecc<\/b><\/p>\n

Nguy\u1ec5n Minh Thanh<\/b>1<\/b>, \u0110\u00e0o H\u00f9ng M\u1ea1nh<\/b>2<\/b><\/p>\n

1 <\/i>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/i><\/p>\n

2 <\/i>Trung t\u00e2m KHLN v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9<\/i><\/p>\n

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

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng V\u00f9 h\u01b0\u01a1ng (Cinnamomum balansae <\/i>H.Lec) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom v\u00e0 tr\u1ed3ng th\u1eed nghi\u1ec7m 3 xu\u1ea5t x\u1ee9 Tuy\u00ean Quang, Ninh B\u00ecnh v\u00e0 Ph\u00fa Th\u1ecd v\u1edbi 2 c\u00f4ng th\u1ee9c l\u00e0 tr\u1ed3ng theo b\u0103ng v\u00e0 tr\u00ean \u0111\u1ea5t tr\u1ed1ng sau 3 n\u0103m cho th\u1ea5y: Hom c\u00e2y V\u00f9 h\u01b0\u01a1ng c\u00f3 kh\u1ea3 n\u0103ng ra r\u1ec5 cao v\u00ec kh\u00f4ng d\u00f9ng thu\u1ed1c k\u00edch th\u00edch kh\u1ea3 n\u0103ng ra r\u1ec5 v\u1eabn c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1ef7 l\u1ec7 hom ra r\u1ec5 l\u00e0 33,7%. IBA l\u00e0 lo\u1ea1i thu\u1ed1c cho t\u1ef7 l\u1ec7 hom ra r\u1ec5 trung b\u00ecnh \u0111\u1ea1t cao nh\u1ea5t (60%), ti\u1ebfp theo l\u00e0 IAA (53,3%) th\u1ea5p nh\u1ea5t l\u00e0 NAA (51,7%). N\u1ed3ng \u0111\u1ed9 thu\u1ed1c k\u00edch th\u00edch cho t\u1ef7 l\u1ec7 ra r\u1ec5 cao nh\u1ea5t \u1edf 2 lo\u1ea1i thu\u1ed1c IBA v\u00e0 NAA l\u00e0 1,5%. V\u1edbi lo\u1ea1i thu\u1ed1c IAA c\u1ea3 4 lo\u1ea1i n\u1ed3ng \u0111\u1ed9 \u0111\u1ec1u cho t\u1ef7 l\u1ec7 ra r\u1ec5 nh\u01b0 nhau v\u00e0 ch\u01b0a c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t sau 40 ng\u00e0y theo d\u00f5i. Sau 3 n\u0103m tr\u1ed3ng t\u1ea1i \u0110oan H\u00f9ng Ph\u00fa Th\u1ecd c\u00e1c xu\u1ea5t x\u1ee9 V\u00f9 h\u01b0\u01a1ng \u1edf ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng theo b\u0103ng cho sinh tr\u01b0\u1edfng v\u1ec1 Do v\u00e0 Hvn cao h\u01a1n tr\u1ed3ng \u1edf n\u01a1i \u0111\u1ea5t tr\u1ed1ng. Trong c\u00f4ng th\u1ee9c tr\u1ed3ng theo b\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a V\u00f9 h\u01b0\u01a1ng xu\u1ea5t x\u1ee9 Tuy\u00ean Quang cho sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t v\u1edbi Do = 4,10cm, Hvn = 3,43m; ti\u1ebfp theo l\u00e0 xu\u1ea5t x\u1ee9 Ninh B\u00ecnh v\u00e0 nh\u1ecf nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Ph\u00fa Th\u1ecd c\u00f3 Do = 2,93cm, Hvn = 2,15m. V\u1edbi th\u00ed nghi\u1ec7m tr\u1ed3ng tr\u00ean \u0111\u1ea5t tr\u1ed1ng th\u00ec xu\u1ea5t x\u1ee9 Tuy\u00ean Quang c\u0169ng cho sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t v\u1edbi Do = 3,72cm, Hvn = 3,09m v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Ph\u00fa Th\u1ecd c\u00f3 Do = 2,69cm, Hvn = 2,1m. Nh\u01b0 v\u1eady sau 3 n\u0103m tr\u1ed3ng t\u1ea1i \u0110oan H\u00f9ng Ph\u00fa Th\u1ecd b\u01b0\u1edbc \u0111\u1ea7u \u0111\u00e3 cho th\u1ea5y V\u00f9 h\u01b0\u01a1ng xu\u1ea5t x\u1ee9 Tuy\u00ean Quang cho sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c xu\u1ea5t x\u1ee9 Ninh B\u00ecnh v\u00e0 Ph\u00fa Th\u1ecd.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng, g\u00e2y tr\u1ed3ng, V\u00f9 h\u01b0\u01a1ng, Ph\u00fa Th\u1ecd<\/p>\n

 <\/p>\n

Vegetative propagation and planting techniques for Cinnamomum balansae <\/i>H.Lec in Doan Hung, Phu Tho province<\/b><\/p>\n

The research aims at vegetative propagation of Cinnamomum balansae <\/i>H.Lec by stem cutting method and planting trial 3 provenances of C.balansae<\/i>can species originated from Tuyen Quang, Ninh Binh and Phu Tho by strip plantation and on bare land in 2013. The result shows that: C.balansae<\/i>can get 33.7% growing adventitious roots without using growth stimulants. The average rate of growing roots for IBA stimulant is 60%, IAA is 53.3% and NAA is 51.7%. The concentration at which we get the highest rate of growing roots for IBA and NAA is 1.5%. Only for IAA, all 4 samples of concentration stimulate the same rate of growing roots after 40 days. After 3 years, C.balansae <\/i>which planted by strip planting have higher Do and Hvn than on bare land. By strip planting, C.balansae <\/i>originated from Tuyen Quang provenance has largest with Do = 4.10cm, Hvn = 3.43m; the ones from Ninh Binh provenance and Phu Tho provenance have Do = 2.93cm, Hvn = 2.15m. On bare land, C.balansae <\/i>from Tuyen Quang also has largest with Do = 3.72cm, Hvn = 3.09m; the one from Phu Tho has smallest with Do = 2.69cm, Hvn = 2.1m. From this result, we can have initial assessment that C.balansae <\/i>from Tuyen Quang has highest growth rate, following is Ninh Binh and Phu Tho provenances. <\/b><\/p>\n

Keywords: <\/i><\/b>Vegetative propagation, planting, Cinnamomum balansae <\/i>H.Lec, Phu Tho province<\/p>\n

\u00a0<\/b><\/p>\n

BI\u1ebeN D\u1eca V\u00c0 TH\u00d4NG S\u1ed0 DI TRUY\u1ec0N C\u1ee6A C\u00c1C D\u00d2NG V\u00d4 T\u00cdNH KEO LAI M\u1edaI CH\u1eccN L\u1eccC T\u1ea0I KH\u1ea2O NGHI\u1ec6M D\u00d2NG V\u00d4 T\u00cdNH \u1ede Y\u00caN TH\u1ebe, B\u1eaeC GIANG<\/b><\/p>\n

\u0110\u1ed7 H\u1eefu S\u01a1n, H\u00e0 Huy Th\u1ecbnh, Nguy\u1ec5n \u0110\u1ee9c Ki\u00ean, D\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n Nguy\u1ec5n Qu\u1ed1c To\u1ea3n, Tr\u1ecbnh V\u0103n Hi\u1ec7u <\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 CNSH L\u00e2m nghi\u1ec7p<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Nghi\u00ean c\u1ee9u bi\u1ebfn d\u1ecb v\u00e0 th\u00f4ng s\u1ed1 di truy\u1ec1n v\u1ec1 sinh tr\u01b0\u1edfng, ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y, kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang g\u1ed7 v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i \u0111o b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e1n ti\u1ebfp s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb Fakopp c\u1ee7a keo lai \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean 138 d\u00f2ng keo lai m\u1edbi ch\u1ecdn t\u1ea1o v\u00e0 12 c\u00f4ng th\u1ee9c \u0111\u1ed1i ch\u1ee9ng (6 d\u00f2ng keo lai \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn, 3 l\u00f4 h\u1ea1t Keo tai t\u01b0\u1ee3ng, 3 l\u00f4 h\u1ea1t Keo l\u00e1 tr\u00e0m), \u1edf tu\u1ed5i 3 tr\u00ean kh\u1ea3o nghi\u1ec7m d\u00f2ng v\u00f4 t\u00ednh t\u1ea1i Y\u00ean Th\u1ebf, B\u1eafc Giang nh\u1eb1m t\u00ecm hi\u1ec3u c\u01a1 s\u1edf khoa h\u1ecdc cho ch\u01b0\u01a1ng tr\u00ecnh ch\u1ecdn gi\u1ed1ng keo lai. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y sinh tr\u01b0\u1edfng, kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang g\u1ed7 v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i gi\u1eefa c\u00e1c d\u00f2ng v\u00f4 t\u00ednh c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t (Fpr. < 0,001). H\u1ec7 s\u1ed1 di truy\u1ec1n theo ngh\u0129a r\u1ed9ng c\u1ee7a c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng \u1edf m\u1ee9c trung b\u00ecnh (H2 = 0,36 -0,39) v\u00e0 h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng di truy\u1ec1n cao (CVG = 10,1 – 13,1%). H\u1ec7 s\u1ed1 di truy\u1ec1n c\u1ee7a t\u00ednh tr\u1ea1ng m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i (H2 = 0,20) th\u1ea5p h\u01a1n so v\u1edbi h\u1ec7 s\u1ed1 di truy\u1ec1n c\u1ee7a t\u00ednh tr\u1ea1ng kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (H2 = 0,47). H\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng di truy\u1ec1n c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i \u1edf m\u1ee9c trung b\u00ecnh (7,4 – 7,7%). T\u01b0\u01a1ng quan ki\u1ec3u h\u00ecnh gi\u1eefa t\u00ednh tr\u1ea1ng sinh tr\u01b0\u1edfng v\u1edbi c\u00e1c t\u00ednh ch\u1ea5t g\u1ed7 \u1edf keo lai t\u1ea1i \u0111\u00e2y l\u00e0 y\u1ebfu v\u00e0 kh\u00f4ng c\u00f3 \u00fd ngh\u0129a (-0,054 – 0,105), do \u0111\u00f3 vi\u1ec7c c\u1ea3i thi\u1ec7n c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng s\u1ebd kh\u00f4ng \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn c\u00e1c t\u00ednh ch\u1ea5t g\u1ed7 \u1edf keo lai. T\u01b0\u01a1ng quan ki\u1ec3u h\u00ecnh gi\u1eefa t\u00ednh tr\u1ea1ng kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u1edbi m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i \u1edf m\u1ee9c trung b\u00ecnh (r = 0,41) cho th\u1ea5y c\u1ea3i thi\u1ec7n kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u0169ng l\u00e0m gia t\u0103ng m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i \u1edf g\u1ed7 keo lai.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>H\u1ec7 s\u1ed1 di truy\u1ec1n theo ngh\u0129a r\u1ed9ng, Fakopp, keo lai, kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang g\u1ed7, m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/p>\n

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Genotypic variation on clones of acacia hybrid at Yen The clonal test <\/b><\/p>\n

Genotypic variation and clonal repeatabilities in growth, stem quality, wood density and dynamic modulus of elasticity (MoEd) of acacia hybrid were estimated in 138 newly sellected clones and 12 control clones (6 commercial clones, 3 bulked seedlots of Acacia mangium <\/i>and 3 bulked seedlots of Acacia auriculiformis<\/i>) at age 3 years in a clonal trial at Yen The, Bac Giang. The results showed that there were significant differences (Fpr. < 0.001) in growth, wood density and MoEd between clones. The clonal repeatability of growth traits were moderate (H2 = 0.36 – 0.39) and coefficients of genotypic variation were high (CVG = 10.1 – 13.1%). The clonal repeatability of MoEd were lower than that for wood density, 0.20 and 0.47, respectively. The coefficients of genotypic varation of wood density and MoEd were moderate (7.4 – 7.7%). Phenotypic correlations between growth traits and wood properties were weak and nonsignificantly (-0,054 to 0,105). These correlations suggest that improvement of the growth traits of acacia hybrid could not affect on wood properties. The correlation between wood density and MoEd were moderate (r = 0,41) showed that selection of wood density could influence positively on MoEd of this species.<\/p>\n

Keywords: <\/i><\/b>Acacia hybrid, Fakopp, modulus of elasticity, repeatability, wood density<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/b><\/p>\n

PH\u00c2N T\u00cdCH M\u1ed0I QUAN H\u1ec6 DI TRUY\u1ec0N GI\u1eeeA C\u00c1C QU\u1ea6N TH\u1ec2 S\u01a0N TRA (Docynia indica <\/i>(Wall.) Decne) B\u1eb0NG CH\u1ec8 TH\u1eca ISSR<\/b><\/p>\n

V\u0169 Th\u1ecb Thu Hi\u1ec1n1, Tr\u1ea7n Th\u1ecb Li\u1ec7u1, \u0110inh Th\u1ecb Ph\u00f2ng1, Ph\u00ed H\u1ed3ng H\u1ea3i2, La \u00c1nh D\u01b0\u01a1ng2, V\u0169 \u0110\u1ee9c To\u00e0n3, Delia Catacutan4, \u0110\u00e0m Vi\u1ec7t B\u1eafc4<\/b><\/p>\n

1 B\u1ea3o t\u00e0ng Thi\u00ean nhi\u00ean Vi\u1ec7t Nam 2 Vi\u1ec7n KH L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam 3 \u0110\u1ea1i h\u1ecdc T\u00e2y B\u1eafc 4 T ch\u1ee9c N\u00f4ng L\u00e2m qu\u1ed1c t\u1ebf (ICRAF) t\u1ea1i Vi\u1ec7t Nam<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Trong nghi\u00ean c\u1ee9u c\u1ee7a ch\u00fang t\u00f4i, 30 ch\u1ec9 th\u1ecb ISSR \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nghi\u00ean c\u1ee9u \u0111a d\u1ea1ng di truy\u1ec1n genome c\u1ee7a 35 m\u1eabu S\u01a1n tra thu th\u1eadp \u1edf 7 qu\u1ea7n th\u1ec3 (M\u01b0\u1eddng La, C\u00e0 M\u1ea1, B\u1eafc Y\u00ean, Tr\u1ea1m T\u1ea5u, M\u00f9 C\u0103ng Ch\u1ea3i, B\u00e1t X\u00e1t and S\u00ecn H\u1ed3). K\u1ebft qu\u1ea3 ch\u1ec9 ra 28\/30 ch\u1ec9 th\u1ecb ch\u1ec9 ra t\u00ednh \u0111a h\u00ecnh v\u00e0 nh\u00e2n b\u1ea3n \u0111\u01b0\u1ee3c 148 ph\u00e2n \u0111o\u1ea1n DNA, trong \u0111\u00f3 c\u00f3 96 ph\u00e2n \u0111o\u1ea1n \u0111a h\u00ecnh (chi\u1ebfm 64,86%). Trung b\u00ecnh gi\u00e1 tr\u1ecb \u0111a d\u1ea1ng gen tr\u00ean m\u1ed9t locus (Hj<\/i>) v\u00e0 h\u00e0m l\u01b0\u1ee3ng th\u00f4ng tin \u0111a h\u00ecnh c\u1ee7a c\u00e1c ch\u1ec9 th\u1ecb t\u01b0\u01a1ng \u1ee9ng l\u00e0 0,133 v\u00e0 0,119. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch c\u00e1c th\u00f4ng s\u1ed1 di truy\u1ec1n c\u1ee7a 5 ti\u1ec3u qu\u1ea7n th\u1ec3 S\u01a1n tra (tr\u1eeb 2 ti\u1ec3u qu\u1ea7n th\u1ec3 C\u00f2 M\u1ea1 v\u00e0 S\u00ecn H\u1ed3 ch\u1ec9 c\u00f3 m\u1ed9t c\u00e1 th\u1ec3 duy nh\u1ea5t kh\u00f4ng \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 th\u00f4ng s\u1ed1 di truy\u1ec1n) cho th\u1ea5y t\u00ednh \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a c\u00e1c ti\u1ec3u qu\u1ea7n th\u1ec3 S\u01a1n tra \u1edf T\u00e2y B\u1eafc t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p (Na <\/i>= 1,013; Ne <\/i>= 1,109; I <\/i>= 0,122, He <\/i>= 0,084; h <\/i>= 0,075 v\u00e0 PPB <\/i>= 21,17%) trong \u0111\u00f3 th\u1ea5p nh\u1ea5t l\u00e0 ti\u1ec3u qu\u1ea7n th\u1ec3 B\u00e1t X\u00e1t v\u00e0 cao nh\u1ea5t l\u00e0 ti\u1ec3u qu\u1ea7n th\u1ec3 B\u1eafc Y\u00ean. H\u1ec7 s\u1ed1 di nh\u1eadp gen (Nm<\/i>) c\u1ee7a lo\u00e0i S\u01a1n tra \u1edf m\u1ee9c trung b\u00ecnh (Nm <\/i>= 0,843), th\u1ec3 hi\u1ec7n cao nh\u1ea5t \u1edf hai locus UBC834 v\u00e0 UBC841 (Nm <\/i>= 4,0) v\u00e0 th\u1ea5p nh\u1ea5t \u1edf locus ISSR6 v\u00e0 UBC859 (Nm <\/i>= 0). H\u1ec7 s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed3ng di truy\u1ec1n gi\u1eefa 35 m\u1eabu S\u01a1n tra dao \u0111\u1ed9ng t\u1eeb 0,567 (BY29 v\u00e0 TT45, BS63) \u0111\u1ebfn 0,965 (MCC49 v\u00e0 MCC51). Bi\u1ec3u \u0111\u1ed3 h\u00ecnh c\u00e2y th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 di truy\u1ec1n gi\u1eefa 35 m\u1eabu S\u01a1n tra ph\u00e2n t\u00edch v\u1edbi ch\u1ec9 th\u1ecb ISSR chia l\u00e0m 2 nh\u00e1nh ch\u00ednh c\u00f3 h\u1ec7 s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed3ng di truy\u1ec1n trong kho\u1ea3ng 61 – 96%, c\u00e1c m\u1eabu thu \u1edf c\u00f9ng m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m \u0111\u1ec1u n\u1eb1m trong nh\u1eefng nh\u00e1nh ph\u1ee5 ri\u00eang bi\u1ec7t.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>S\u01a1n tra, Docynia indica<\/i>, \u0111a h\u00ecnh AND, m\u1ed1i quan h\u1ec7 di truy\u1ec1n, ISSR<\/p>\n

 <\/td>\n<\/tr>\n

Analysis of genetic diversity between populations of Docynia indica <\/i>(Wall.) Dence by ISSR markers <\/b><\/p>\n

In our study, 30 ISSR markers were used to assess genetic diversity of 35 Docynia indica <\/i>samples collected from 7 different populations (Muong La, Co Ma, Bac Yen, Tram Tau, Mu Cang Chai, Bat Xat and Sin Ho). Among 30 ISSR markers, there were 28 markers that revealed polymorphism. A total of 148 DNA fragments were generated but only 96 DNA fragments showed polymorphism (approximately 64.86%). Average value of genetic diversity on a locus and polymorphism information of the markers were 0.133 and 0.119, respectively. The results of genetic diversity of 5 populations of Docynia indica <\/i>(<\/b>except for Co Ma v\u00e0 Sin Ho; because they have only one sample) showed that genetic diversity of 5 populations of Docynia indica <\/i>was low (Na <\/i>= 1.013; Ne <\/i>= 1.109; I <\/i>= 0.122, He <\/i>= 0.084; h <\/i>= 0.075 v\u00e0 PPB <\/i>= 21.17%). Bat Xat population was the lowest genetic diversity; Bac Yen population was the highest genetic diversity. Gene-flow (Nm<\/i>) of Docynia indica <\/i>was average (Nm <\/i>= 0.843), two locus UBC834 v\u00e0 UBC841 (Nm <\/i>= 4.0) had the hightest values and two locus ISSR6 and UBC859 (Nm <\/i>= 0) had the lowest. Genetic similarity coefficients between samples ranged from 0.567 (BY29 and TT45, BS63) to 0.965 (MCC49 and MCC51). The pattern of grouping in the dendrogram divided 35 Docynia indica <\/i>samples into 2 main groups, with genetic similarity coefficients ranged from 61-96%. The samples collected from the same population belong to separate subgroups group.<\/p>\n

Keywords: <\/i><\/b>Docynia indica <\/i>(Wall.) Dence, polymorphism DNA genetic diversity, ISSR<\/p>\n

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

TH\u00c0NH PH\u1ea6N LO\u00c0I V\u00c0 PH\u00c2N B\u1ed0 C\u1ee6A C\u00c1C LO\u00c0I THU\u1ed8C CHI B\u01af\u1edaM B\u1ea0C (Mussaenda <\/i>L.) \u1ede L\u00c2M \u0110\u1ed2NG<\/b><\/p>\n

Qu\u00e1ch V\u0103n H\u1ee3i1, V\u0169 Kim C\u00f4ng1, Tr\u1ea7n Th\u00e1i Vinh1, H\u2019Yon N\u00ea Bing1, \u0110\u1eb7ng Th\u1ecb Th\u1eafm1, Nguy\u1ec5n Th\u1ecb H\u1ed3ng2 v\u00e0 N\u00f4ng V\u0103n Duy1<\/b><\/p>\n

1Vi\u1ec7n Nghi\u00ean c\u1ee9u Khoa h\u1ecdc T\u00e2y Nguy\u00ean, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam 2Khoa Sau \u0111\u1ea1i h\u1ecdc, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Th\u00e0nh ph\u1ea7n lo\u00e0i B\u01b0\u1edbm b\u1ea1c \u1edf L\u00e2m \u0110\u1ed3ng \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u d\u1ef1a tr\u00ean m\u1eabu v\u1eadt thu \u0111\u01b0\u1ee3c th\u00f4ng qua c\u00e1c chuy\u1ebfn \u0111i\u1ec1u tra kh\u1ea3o s\u00e1t v\u00e0 d\u1ef1a tr\u00ean c\u00e1c ti\u00eau b\u1ea3n l\u01b0u gi\u1eef \u1edf c\u00e1c B\u1ea3o t\u00e0ng th\u1ef1c v\u1eadt tr\u00ean th\u1ebf gi\u1edbi c\u0169ng nh\u01b0 \u1edf Vi\u1ec7t Nam. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra c\u00f3 10 lo\u00e0i \u0111\u01b0\u1ee3c ghi nh\u1eadn \u1edf L\u00e2m \u0110\u1ed3ng: Mussaenda chevalieri <\/i>Pit., Mussaenda densiflora <\/i>H. L. Li, Mussaenda erosa <\/i>Champ. Ex Benth., Mussaenda hoaensis <\/i>Pierre ex Pit., Mussaenda longipetala <\/i>H. L. Li, Mussaenda philippica <\/i>A. Rich., Mussaenda pubescens <\/i>Ait. F., Mussaenda squiresii <\/i>Merr., Mussaenda theifera <\/i>Pierre ex Pit., Mussaenda thorelii <\/i>Pit.. Hi\u1ec7n nay \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng s\u1ed1ng t\u1ef1 nhi\u00ean c\u1ee7a ch\u00fang b\u1ecb thay \u0111\u1ed5i, do \u0111\u00f3 c\u1ea7n c\u00f3 nhi\u1ec1u gi\u1ea3i ph\u00e1p c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea3o t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c lo\u00e0i c\u00f3 gi\u00e1 tr\u1ecb l\u00e0m thu\u1ed1c v\u00e0 th\u1ea9m m\u1ef9 n\u00e0y.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>B\u01b0\u1edbm b\u1ea1c (Mussaenda <\/i>L.), L\u00e2m \u0110\u1ed3ng<\/p>\n

 <\/td>\n<\/tr>\n

Species composition and distribution of species of the genus Mussaenda <\/i>L. in Lam Dong province <\/b><\/p>\n

A synopsis of the genus Mussaenda <\/i>L. in Lam Dong province was made by mean of literature search, consultation of the herbarium specimens, and surveys of several localities through Lam Dong province. There are 10 species in genus Mussaenda <\/i>L. in the total are found in Lam Dong province including: Mussaenda chevalieri <\/i>Pit., Mussaenda densiflora <\/i>H. L. Li, Mussaenda erosa <\/i>Champ. ex Benth., Mussaenda hoaensis <\/i>Pierre ex Pit., Mussaenda longipetala <\/i>H. L. Li, Mussaenda philippica <\/i>A. Rich., Mussaenda pubescens <\/i>Ait. F., Mussaenda squiresii <\/i>Merr., Mussaenda theifera <\/i>Pierre ex Pit., Mussaenda thorelii <\/i>Pit. Genus Mussaenda <\/i>L. is present in almost all the forests of Lam Dong province from 180m to 1,800m a.s.l. At present, the environment is changing, therefore, solutions should be found to conserve and develop them as medicinal and ornamental species.<\/p>\n

Keywords: <\/i><\/b>Mussaenda <\/i>L., Lam Dong<\/p>\n

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K\u1ebeT QU\u1ea2 \u0110I\u1ec0U TRA TH\u00c0NH PH\u1ea6N C\u00c1C LO\u00c0I C\u1ee6A H\u1ecc D\u1eba (FAGACEAE) T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN NAM NUNG, T\u1ec8NH \u0110\u1eaeK N\u00d4NG<\/b><\/p>\n

Nguy\u1ec5n Quang H\u01b0ng, Tr\u1ecbnh Ng\u1ecdc Bon, Ph\u1ea1m V\u0103n Vinh <\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, Vi\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 \u0111i\u1ec1u tra h\u1ecd D\u1ebb (Fagaceae) t\u1ea1i Khu BTTN Nam Nung ghi nh\u1eadn 62 lo\u00e0i thu\u1ed9c 4 chi, trong \u0111\u00f3 chi Lithocarpus <\/i>c\u00f3 36 lo\u00e0i chi\u1ebfm 58,1% t\u1ed5ng s\u1ed1 lo\u00e0i, ti\u1ebfp theo l\u00e0 chi Castanopsis <\/i>c\u00f3 16 lo\u00e0i chi\u1ebfm 25,8%, chi Quercus <\/i>c\u00f3 9 lo\u00e0i chi\u1ebfm 14,5% v\u00e0 chi Trigonobalanus <\/i>c\u00f3 1 lo\u00e0i chi\u1ebfm 1,6%. V\u1ec1 gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng, \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 35 lo\u00e0i \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 l\u1ea5y g\u1ed7, chi\u1ebfm 61,3% t\u1ed5ng s\u1ed1 lo\u00e0i, ti\u1ebfp \u0111\u1ebfn l\u00e0 nh\u00f3m lo\u00e0i cho tannin (14 lo\u00e0i) chi\u1ebfm 22,6%, nh\u00f3m lo\u00e0i l\u1ea5y h\u1ea1t (8 lo\u00e0i) chi\u1ebfm 12,9% v\u00e0 cu\u1ed1i c\u00f9ng nh\u00f3m c\u00e2y l\u00e0m c\u1ea3nh 2 lo\u00e0i chi\u1ebfm 3,2%. C\u00f3 12 lo\u00e0i \u0111ang b\u1ecb \u0111e d\u1ecda \u0111\u01b0\u1ee3c ghi trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007), trong \u0111\u00f3 c\u00f3 10 lo\u00e0i \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o c\u1ea5p S\u1ebd nguy c\u1ea5p (VU) v\u00e0 2 lo\u00e0i \u1edf c\u1ea5p Nguy c\u1ea5p (EN).<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean, D\u1ebb, Nam Nung<\/p>\n

 <\/td>\n<\/tr>\n

Survey results of species composition of Fagaceae in Nam Nung Nature Reserve, Dak Nong province <\/b><\/p>\n

This research investigated the diversity of the Fagacae family in Nam Nung nature reserve, based on mutiple study plots within the reserve. Results indicated that there are 62 species in four genera in the Fagaceae family in Nam Nung. The genera are Lithocarpus, Castanopsis, Quercus <\/i>and Trigobalanus. <\/i>The Lithocarpus <\/i>genus has 36 species, accounting for 58.1% of the total number of species in the Fagaceae family in Nam Nung; the Castanopsis <\/i>genus has 16 species, accounting for 25.8%; the Quercus <\/i>genus hasninespecies, accounting for 14.5%; and the Trigobalanus <\/i>genus has 1 species, accounting for 1.6%. The results show that there are 35 timber species, accounting for 61.3% of all species in the family; 14 species with high tannin concentration, accounting for 22.6%; eight species harvesting seed, accounting for 12.9%; and two ornamental species, accounting for 3.2%. Twelve of the species are listed as threatened species in the Vietnam Red Book (2007), ten of these are in the vulnerable level and two species are in the endangered level.<\/p>\n

Keywords: <\/i><\/b>Nature resever, Fagaceae, Nam Nung<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC V\u00c0 \u0110A D\u1ea0NG SINH H\u1eccC T\u1ea6NG C\u00c2Y G\u1ed6 R\u1eeaNG PH\u1ee4C H\u1ed2I SAU KHAI TH\u00c1C T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN V\u0102N H\u00d3A \u0110\u1ed2NG NAI<\/b><\/p>\n

Ph\u00f9ng \u0110\u00ecnh Trung, Tr\u1ea7n L\u00e2m \u0110\u1ed3ng, Ph\u1ea1m Quang Tuy\u1ebfn, Ninh Vi\u1ec7t Kh\u01b0\u01a1ng, Nguy\u1ec5n Th\u1ecb Thu Ph\u01b0\u01a1ng, Tr\u1ea7n Ho\u00e0ng Qu\u00fd <\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/p>\n

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

Khu B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean V\u0103n h\u00f3a \u0110\u1ed3ng Nai (KBT\u0110N) \u0111\u01b0\u1ee3c th\u00e0nh l\u1eadp n\u0103m 2004 c\u00f3 t\u1ed5ng di\u1ec7n t\u00edch l\u00e0 97.152ha, ch\u1ee7 y\u1ebfu l\u00e0 r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh sau khai th\u00e1c ki\u1ec7t. Nghi\u00ean c\u1ee9u c\u1ea5u tr\u00fac v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc t\u1ea7ng c\u00e2y g\u1ed7 sau kho\u1ea3ng 20 n\u0103m \u0111\u00f3ng c\u1eeda r\u1eebng cho th\u1ea5y, r\u1eebng th\u01b0\u1eddng xanh trung b\u00ecnh (TXB) c\u00f3 m\u1eadt \u0111\u1ed9 (N) dao \u0111\u1ed9ng t\u1eeb 470 – 960 c\u00e2y\/ha, tr\u1eef l\u01b0\u1ee3ng (M) dao \u0111\u1ed9ng trong kho\u1ea3ng 138,4 \u00b1 30,5 m3\/ha, r\u1eebng th\u01b0\u1eddng xanh ngh\u00e8o (TXN) c\u00f3 m\u1eadt \u0111\u1ed9 t\u1eeb 520 – 820 c\u00e2y\/ha, M = 65,4 \u00b1 8,4 m3\/ha v\u00e0 r\u1eebng th\u01b0\u1eddng xanh ki\u1ec7t (TXK) c\u00f3 m\u1eadt \u0111\u1ed9 t\u1eeb 520 – 820 c\u00e2y\/ha, M = 28,5 \u00b1 11,8 m3\/ha. Trong 30 \u00f4 ti\u00eau chu\u1ea9n (OTC) \u0111i\u1ec1u tra, 18 \u00f4 ph\u00e2n b\u1ed1 N\/D tu\u00e2n theo lu\u1eadt ph\u00e2n b\u1ed1 Kho\u1ea3ng c\u00e1ch, 6 \u00f4 \u0111\u1ed3ng th\u1eddi theo ph\u00e2n b\u1ed1 Meyer v\u00e0 Kho\u1ea3ng c\u00e1ch, v\u00e0 6 \u00f4 kh\u00f4ng r\u00f5 quy lu\u1eadt. Ph\u00e2n b\u1ed1 c\u00f3 d\u1ea1ng m\u1ed9t \u0111\u1ec9nh l\u1ec7ch tr\u00e1i ho\u1eb7c gi\u1ea3m d\u1ea7n. Trong qu\u1ea7n x\u00e3, \u0111\u00e3 h\u00ecnh th\u00e0nh c\u00e1c lo\u00e0i \u01b0u th\u1ebf (IV = 5 – 48,6%), v\u00e0 m\u1ed9t s\u1ed1 \u01b0u h\u1ee3p th\u1ef1c v\u1eadt, trong \u0111\u00f3 Ch\u00f2 chai, Tr\u01b0\u1eddng qu\u1ea3 \u0111\u00f4i, B\u00ecnh linh, Th\u00e0nh ng\u1ea1ch l\u00e0 nh\u1eefng lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf l\u1edbn nh\u1ea5t trong l\u00e2m ph\u1ea7n. V\u1ec1 \u0111a d\u1ea1ng sinh h\u1ecdc, ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c 190 lo\u00e0i c\u00e2y g\u1ed7, trong \u0111\u00f3 c\u00f3 63 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, 65 lo\u00e0i c\u00e2y g\u1ed7 trung b\u00ecnh, 62 lo\u00e0i g\u1ed7 nh\u1ecf. Ch\u1ec9 s\u1ed1 \u0111a d\u1ea1ng sinh h\u1ecdc Simpson (D), DTXB = 0,961, DTXN = 0,966, v\u00e0 DTXK = 0,956. Ch\u1ec9 s\u1ed1 \u0111a d\u1ea1ng Lo\u00e0i – k\u00edch th\u01b0\u1edbc (H\u2019), H\u2019TXB = 4,874, H\u2019TXK = 4,751, v\u00e0 H\u2019TXN = 4,726.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>R\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh, c\u00e2y h\u1ecd D\u1ea7u, Khu d\u1ef1 tr\u1eef sinh quy\u1ec3n \u0110\u1ed3ng Nai<\/p>\n

 <\/td>\n<\/tr>\n

Structure and biodiversity of timber layer of logged-over forests in the Dong Nai Culture and Nature Reserve <\/b><\/p>\n

Dong Nai Culture and Nature Reserve, belonging to Dong Nai Biosphere Reserve, was established in 2004, with a total area of 97,152ha, mainly logged-over evergreen broadleaf forests. Study on structure and biodiversity of timber layer 20 years after loggings showed that, the stem density and standing volume of the trees (DBH \u2265 10cm) of the medium forests (TXB) were 470 – 960 trees\/ha and 138.4 \u00b1 30.5 m3\/ha, respecively; which were 520 – 820 trees\/ha and 65.4 \u00b1 8.4 m3\/ha in the poor forests (TXN), and 520 – 820 trees\/ha and 28.5 \u00b1 11.8 m3\/ha in the seriously degraded forest (TXK). Diameter distribution of 30 surveyed plots showed that 18 plots were fitted Distance distribution; 6 plots were fitted by both Meyer and Distance distributions; and 6 plots were not fitted by any distributions. Distribution forms were in inverted J-shape curve, a common form of diameter distribution of the logged-over forest. There have been formed a number of dominant species (IV = 5 – 48.6%), such as Shorea guiso <\/i>(Blco.) Bl, Xerospermum noronhianum <\/i>(Bl.) Bl, Vitex tripinnata <\/i>(Lour.) Merr and Cratoxylon formosum <\/i>(Jack,) Dyer. For biodiversity, 190 timber species were found, including 63 large-size timber species, 65 medium-size timber species and 62 small-size timber species. Simpson index (D) were DTXB = 0.961, DTXN = 0.966, and DTXK = 0.956. Dimension-species diversity index (H\u2019) were H\u2019TXB = 4.874, H\u2019TXK = 4.751, and H\u2019TXN = 4.726.<\/p>\n

Keywords: <\/i><\/b>Evergreen broadleaf forest, Dipterocarp, Dong Nai Biosphere Reserve<\/p>\n

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CH\u1ec8 S\u1ed0 PH\u1ee8C T\u1ea0P V\u1ec0 C\u1ea4U TR\u00daC \u0110\u1ed0I V\u1edaI R\u1eeaNG K\u00cdN TH\u01af\u1edcNG XANH \u1ea8M NHI\u1ec6T \u0110\u1edaI \u1ede KHU V\u1ef0C M\u00c3 \u0110\u00c0 T\u1ec8NH \u0110\u1ed2NG NAI<\/b><\/p>\n

Nguy\u1ec5n V\u0103n Th\u00eam1, Nguy\u1ec5n Tu\u1ea5n B\u00ecnh2<\/b><\/p>\n

1 Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Tp. H\u1ed3 Ch\u00ed Minh 2 Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p – C s\u1edf II<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

S\u1ed1 li\u1ec7u thu th\u1eadp v\u1ec1 \u0111a d\u1ea1ng lo\u00e0i c\u00e2y g\u1ed7 v\u00e0 ch\u1ec9 s\u1ed1 ph\u1ee9c t\u1ea1p v\u1ec1 c\u1ea5u tr\u00fac bao g\u1ed3m 115 \u00f4 m\u1eabu \u0111i\u1ec3n h\u00ecnh v\u1edbi k\u00edch th\u01b0\u1edbc 0,2ha; trong \u0111\u00f3 49 \u00f4 m\u1eabu \u1edf r\u1eebng th\u1ee9 sinh, 51 \u00f4 m\u1eabu \u1edf r\u1eebng ch\u01b0a \u1ed5n \u0111\u1ecbnh v\u00e0 15 \u00f4 m\u1eabu \u1edf r\u1eebng \u1ed5n \u0111\u1ecbnh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng, s\u1ed1 lo\u00e0i c\u00e2y g\u1ed7 b\u1eaft g\u1eb7p l\u1edbn nh\u1ea5t \u1edf r\u1eebng ch\u01b0a \u1ed5n \u0111\u1ecbnh (27 lo\u00e0i), th\u1ea5p nh\u1ea5t \u1edf r\u1eebng \u1ed5n \u0111\u1ecbnh (22 lo\u00e0i). Ch\u1ec9 s\u1ed1 gi\u00e0u c\u00f3 v\u1ec1 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn nh\u1ea5t \u1edf r\u1eebng ch\u01b0a \u1ed5n \u0111\u1ecbnh (d = 5,28), th\u1ea5p nh\u1ea5t \u1edf r\u1eebng \u1ed5n \u0111\u1ecbnh (4,66). Ch\u1ec9 s\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u gia t\u0103ng d\u1ea7n t\u1eeb r\u1eebng th\u1ee9 sinh (0,80) \u0111\u1ebfn r\u1eebng ch\u01b0a \u1ed5n \u0111\u1ecbnh (0,83) v\u00e0 r\u1eebng \u1ed5n \u0111\u1ecbnh (0,86). Ch\u1ec9 s\u1ed1 \u0111a d\u1ea1ng H\u2019 nh\u1eadn gi\u00e1 tr\u1ecb cao nh\u1ea5t \u1edf r\u1eebng ch\u01b0a \u1ed5n \u0111\u1ecbnh (2,71), th\u1ea5p nh\u1ea5t \u1edf r\u1eebng th\u1ee9 sinh (2,57). Ch\u1ec9 s\u1ed1 \u0111a d\u1ea1ng \u03b2 – Whittaker nh\u1eadn gi\u00e1 tr\u1ecb cao nh\u1ea5t \u1edf r\u1eebng ch\u01b0a \u1ed5n \u0111\u1ecbnh (\u03b2 = 3,82), th\u1ea5p nh\u1ea5t \u1edf r\u1eebng th\u1ee9 sinh (\u03b2 = 3,69). Ch\u1ec9 s\u1ed1 ph\u1ee9c t\u1ea1p v\u1ec1 c\u1ea5u tr\u00fac (CI) gia t\u0103ng d\u1ea7n t\u1eeb r\u1eebng th\u1ee9 sinh (136 \u00b1 13,9) \u0111\u1ebfn r\u1eebng ch\u01b0a \u1ed5n \u0111\u1ecbnh (202 \u00b1 14,6) v\u00e0 r\u1eebng \u1ed5n \u0111\u1ecbnh (244 \u00b1 59,2). B\u1ed1n c\u1ea5p ph\u1ee9c t\u1ea1p v\u1ec1 c\u1ea5u tr\u00fac qu\u1ea7n th\u1ee5 \u0111\u00e3 \u0111\u01b0\u1ee3c \u01b0\u1edbc l\u01b0\u1ee3ng b\u1eb1ng h\u00e0m l\u1eadp nh\u00f3m tuy\u1ebfn t\u00ednh Fisher d\u1ef1a theo s\u1ed1 lo\u00e0i, m\u1eadt \u0111\u1ed9 v\u00e0 ti\u1ebft di\u1ec7n ngang qu\u1ea7n th\u1ee5.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>R\u1eebng k\u00edn th\u01b0\u1eddng xanh \u1ea9m nhi\u1ec7t \u0111\u1edbi, r\u1eebng th\u1ee9 sinh, \u0111a d\u1ea1ng lo\u00e0i c\u00e2y g\u1ed7<\/p>\n

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Structural complexity index for tropical moist evergreen close forest in Ma Da zone of Dong Nai province <\/b><\/p>\n

In this study, tree species diversity and the stand structure complexity was studied based on 115 sample plots with size 0.2ha; in that 49 in secondary forests, 51 in the unstable forest and 15 in the stable forest. Research results have shown that, species of trees in unstable forest are biggest (27 species), the lowest in a stable forest (22 species). Richness index of tree species in unstable forest is biggest (d = 5.28), lowest in the stable forest (4.66). The Evenness index increased evenly slowly from secondary forests (0.80) to the unstable forest (0.83) and stable forest (0.86). Diversity index H\u2019 received the highest value in the unstable forest (2.71), lowest in secondary forest (2.57). Whittaker\u2019s \u0392 diversity index in the unstable forest is biggest (\u03b2 = 3.82), lowest in the secondary forest (\u03b2 = 3.69). Stand structural complexity index (CI) increased gradually from a secondary forest (136 \u00b1 13.9) to the unstable forest (202 \u00b1 14.6) and stable forest (244 \u00b1 59.2). Four levels of stand structural complexity can be estimated using the Fisher\u2019s linear group functions with three variables: number of species, stand density and base area.<\/p>\n

Keywords: <\/i><\/b>Tropical moist evergreen close forest, secondary forest, unstable forest, tree species diversity<\/p>\n

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

TH\u00c0NH PH\u1ea6N RU\u00d4 T B\u1ea6U \u0110\u1ebeN SINH TR\u01af\u1edeNG C\u1ee6A C\u00c2Y CON S\u01a0N HUY\u1ebeT (Melanorrhoea laccifera <\/i>Pierre) TRONG GIAI \u0110O\u1ea0N V\u01af\u1edcN \u01af\u01a0M<\/b><\/p>\n

Nguy\u1ec5n Th\u1ecb Chuy\u1ec1n, Tr\u01b0\u01a1ng Tu\u1ea5n nh, Ho\u00e0ng Ti\u1ebfn \u0110\u1ea1i<\/b><\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u L\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7<\/i><\/p>\n

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

S\u01a1n huy\u1ebft (Melanorrhoea laccifera <\/i>Pierre) l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba, l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh, v\u1eeba cho g\u1ed7 qu\u00fd v\u1eeba cho s\u1ea3n ph\u1ea9m l\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7 c\u00f3 gi\u00e1 tr\u1ecb. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 cho th\u1ea5y h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u v\u00e0 \u00e1nh s\u00e1ng c\u00f3 \u1ea3nh h\u01b0\u1edfng kh\u00e1 r\u00f5 \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y con S\u01a1n huy\u1ebft trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m. H\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u nu\u00f4i c\u00e2y tuy ch\u01b0a \u1ea3nh h\u01b0\u1edfng r\u00f5 \u0111\u1ed1i v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng, nh\u01b0ng \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng t\u1edbi kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 chi\u1ec1u cao v\u00fat ng\u1ecdn c\u1ee7a c\u00e2y con S\u01a1n huy\u1ebft, trong \u0111\u00f3 c\u00f4ng th\u1ee9c ru\u1ed9t b\u1ea7u t\u1ea1o t\u1eeb 88% \u0111\u1ea5t r\u1eebng t\u1ea7ng B + 10% ph\u00e2n chu\u1ed3ng hoai + 2% supe l\u00e2n c\u00f3 \u1ea3nh h\u01b0\u1edfng t\u1ed1t nh\u1ea5t. T\u1ea1i c\u00f4ng th\u1ee9c n\u00e0y, c\u00e2y con S\u01a1n huy\u1ebft sau 8 th\u00e1ng tu\u1ed5i t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 90,02%; chi\u1ec1u cao v\u00fat ng\u1ecdn \u0111\u1ea1t 37,37cm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 0,54cm. \u0110\u1ed3ng th\u1eddi, \u00e1nh s\u00e1ng c\u0169ng c\u00f3 \u1ea3nh h\u01b0\u1edfng kh\u00e1 r\u00f5 \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ea3 v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 chi\u1ec1u cao v\u00fat ng\u1ecdn c\u1ee7a c\u00e2y con S\u01a1n huy\u1ebft trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m. Giai \u0111o\u1ea1n 2 th\u00e1ng \u0111\u1ea7u k\u1ec3 t\u1eeb khi c\u1ea5y c\u00e2y v\u00e0o b\u1ea7u c\u1ea7n che s\u00e1ng t\u1eeb 50-75%, giai \u0111o\u1ea1n t\u1eeb 2-4 th\u00e1ng tu\u1ed5i c\u1ea7n che s\u00e1ng kho\u1ea3ng 50%, giai \u0111o\u1ea1n t\u1eeb 4-6 th\u00e1ng tu\u1ed5i c\u1ea7n che s\u00e1ng v\u1edbi t\u1ef7 l\u1ec7 25-50%; giai \u0111o\u1ea1n t\u1eeb 6-8 th\u00e1ng ch\u1ec9 c\u1ea7n che s\u00e1ng kho\u1ea3ng 25% l\u00e0 ph\u00f9 h\u1ee3p v\u00e0 cho kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng cao nh\u1ea5t c\u1ea3 v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 chi\u1ec1u cao c\u00e2y S\u01a1n huy\u1ebft. Sau 8 th\u00e1ng tu\u1ed5i \u1edf c\u00f4ng th\u1ee9c h\u1ed7n ru\u1ed9t b\u1ea7u v\u00e0 che s\u00e1ng t\u1ed1t nh\u1ea5t, c\u00e2y con c\u00f3 Doo \u2265 0,5cm v\u00e0 Hvn \u2265 32cm l\u00e0 \u0111\u1ee7 ti\u00eau chu\u1ea9n xu\u1ea5t v\u01b0\u1eddm \u0111em tr\u1ed3ng. Tuy nhi\u00ean, sau 8 th\u00e1ng tu\u1ed5i c\u1ea7n ph\u1ea3i d\u1ee1 b\u1ecf d\u00e0n che ho\u00e0n to\u00e0n \u0111\u1ec3 hu\u1ea5n luy\u1ec7n c\u00e2y con tr\u01b0\u1edbc khi xu\u1ea5t v\u01b0\u1eddn \u0111i tr\u1ed3ng kho\u1ea3ng 1 th\u00e1ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>C\u00e2y con S\u01a1n huy\u1ebft, che s\u00e1ng, th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u<\/td>\n<\/tr>\n

Effects of light and seedling container medium composition on growth of Melanorrhoea laccifera <\/i>Pierre at the stage of nursery <\/b><\/p>\n

Melanorrhoea laccifera <\/i>Pierre is a evergreen broadleaf native species of Vietnam providing high value of timber and non-timber forest products. Research results showed that the composition of seedling container medium and light significantly affected to quality of seedlings for the nursery stage. The container medium composition did not influences survival rates, however it affected on the seedling root collar diameter and height. The formulas of container medium composition including 88% of B layer soil under forest + 10% of manure + 2% of superphosphate is the strongest effect. Tree growthing on this type of container reached 90.02% for survival rates, 37.37cm for height (Hvn) and 0.54cm for root collar diameter at 8 months stages. Simultanenously, light condition significantly affected to survival rate, and growth of root collar diameter and height of seedling in the nursery stages. In the first two month since converting seedling into pots, the best number for shading rate is examined about 50-75%, and then down to 50% of the stage of 2-4 months, 25-50% of the stage 4-6 months, and 25% of the stage of 6-8 months. Seedlings at the stage of 8 aged months for the best container medium composition and light were reached to Doo \u2265 0.5cm and Hvn \u2265 32cm and meet requirement standard of plantation seedling. One month before planting on the field, the shading should be reduced to 0% to help seedlings become familiar with real living condition in the field.<\/p>\n

Keywords: <\/i><\/b>Melanorrhoea laccifera <\/i>seedling, shading, composition of container medium<\/p>\n

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\u1ea2NH H\u01af\u1edeNG C\u1ee6A TH\u00c0NH PH\u1ea6N RU\u1ed8T B\u1ea6U \u0110\u1ebeN SINH TR\u01af\u1edeNG C\u1ee6A M\u1eaeM BI\u1ec2N (Avicennia marina <\/i>(Forssk) Vierh.)<\/i>, S\u00da \u0110\u1ece (Agiceras floridum <\/i>Roem & Schult.)<\/i>, D\u00c0 V\u00d4I (Ceriops tagal <\/i>C.B.Rob.), \u0110\u01afNG (Rhizophora mucronata <\/i>Lam.), \u0110\u01af\u1edaC (Rhizophora apiculata <\/i>Blume) V\u00c0 \u0110\u00c2NG (Rhizophora stylosa <\/i>Griff.) TRONG GIAI \u0110O\u1ea0N V\u01af\u1edcN \u01af\u01a0M T\u1ea0I C\u00c1C \u0110\u1ea2O NAM TRUNG B\u1ed8 V\u00c0 NAM B\u1ed8<\/b><\/p>\n

Ho\u00e0ng V\u0103n Th\u01a1i1, Nguy\u1ec5n H\u1ea3i H\u00f2a2<\/b><\/p>\n

\u00a0<\/b>1Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9 2Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/i><\/p>\n

\n<\/div>\n

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

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i H\u00f2n B\u00e0, C\u00f4n \u0110\u1ea3o v\u00e0 H\u00f2n Nh\u1ea5t T\u1ef1 S\u01a1n, S\u00f4ng C\u1ea7u, Ph\u00fa Y\u00ean v\u1edbi m\u1ee5c \u0111\u00edch t\u00ecm ra h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u th\u00edch h\u1ee3p cho m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n t\u1ea1i v\u01b0\u1eddn \u01b0\u01a1m. Ph\u01b0\u01a1ng ph\u00e1p b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m theo kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7; c\u00e1c ch\u1ec9 ti\u00eau v\u1ec1 t\u1ef7 l\u1ec7 s\u1ed1ng, chi\u1ec1u cao sau 3 th\u00e1ng, 6 th\u00e1ng v\u00e0 9 th\u00e1ng \u0111\u01b0\u1ee3c thu th\u1eadp. K\u1ebft qu\u1ea3 cho th\u1ea5y c\u00f4ng th\u1ee9c h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u th\u00edch h\u1ee3p cho gieo \u01b0\u01a1m lo\u00e0i S\u00fa \u0111\u1ecf v\u00e0 M\u1eafm bi\u1ec3n l\u00e0: 50% b\u00f9n \u0111\u1ea5t + 39% \u0111\u1ea5t c\u00e1t, v\u1ee5n san h\u00f4 + 10% ph\u00e2n vi sinh + 1% NPK; c\u00f4ng th\u1ee9c h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u th\u00edch h\u1ee3p cho \u0110\u01b0ng v\u00e0 \u0110\u00e2ng l\u00e0: 50% b\u00f9n \u0111\u1ea5t + 39% \u0111\u1ea5t c\u00e1t, v\u1ee5n san h\u00f4 + 10% ph\u00e2n vi sinh + 1% NPK ho\u1eb7c 30% \u0111\u1ea5t b\u00f9n + 59% c\u00e1t, v\u1ee5n san h\u00f4 + 10% ph\u00e2n vi sinh + 1% NPK; c\u00f4ng th\u1ee9c h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u th\u00edch h\u1ee3p cho \u0110\u01b0\u1edbc l\u00e0: 50% b\u00f9n \u0111\u1ea5t + 39% \u0111\u1ea5t c\u00e1t, v\u1ee5n san h\u00f4 + 10% ph\u00e2n vi sinh + 1% NPK v\u00e0 c\u00f4ng th\u1ee9c ru\u1ed9t b\u1ea7u th\u00edch h\u1ee3p cho D\u00e0 v\u00f4i l\u00e0: 30% b\u00f9n, \u0111\u1ea5t + 59% c\u00e1t, v\u1ee5n san h\u00f4 + 10% ph\u00e2n vi sinh + 1% NPK.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Gieo \u01b0\u01a1m, c\u00e2y ng\u1eadp m\u1eb7n, ru\u1ed9t b\u1ea7u, t\u1ef7 l\u1ec7 s\u1ed1ng, sinh tr\u01b0\u1edfng<\/p>\n

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Effects of potting component on growth of Avicennia marina, Agiceras florium, Ceriops tagal, Rhizophora mucronata, Rhizophora apiculata <\/i>and Rhizophora stylosa <\/i>in nursery at Southern and Centre Southern Islands <\/b><\/p>\n

The study was done in Hon Ba Island, Con Dao and Nhat Tu Son Islet, Song Cau, Phu Yen in order to find suitable potting mixture for some mangrove species in nurseries. Method was implementated by complete randomized block; indicators of survival, height after 3 months, 6 months and 9 months were collected. The results showed that the suitable potting mixture for Agiceras litoralis <\/i>and Avicennia marina <\/i>is: 50% silt + 39% sand, coral debris + 10% bio fertilizer + 1% NPK; suitable potting mixturefor Rhizophora mucronata <\/i>and R. stylosa <\/i>is: 50% silt + 39% sand, coral debris + 10% bio fertilizer + 1% NPK and 30% silt + 59% sand, coral debris + 10% bio fertilizer + 1% fertilizer NPK; suitable potting mixture for R.apiculata <\/i>is: 50% silt + 39% sand, coral debris + 10% bio fertilizer + 1% NPK and suitable potting mixture for Ceriops tagal is<\/i>: 30% silt + 59% sand, coral debris + 10% bio fertilizer + 1% NPK.<\/p>\n

Keywords: <\/i><\/b>Nursing, mangroves, potting, survival, growth.<\/p>\n

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HI\u1ec6N TR\u1ea0NG QU\u1ea6N TH\u1ec2 D\u1eeaA N\u01af\u1edaC (Nipa fruticans <\/i>Wurmb) T\u1ea0I X\u00c3 TAM NGH\u0128A, HUY\u1ec6N N\u00daI TH\u00c0NH, T\u1ec8NH QU\u1ea2NG NAM V\u00c0 M\u1ed8T S\u1ed0 \u0110\u1ecaNH H\u01af\u1edaNG QU\u1ea2N L\u00dd B\u1ec0N V\u1eeeNG T\u00c0I NGUY\u00caN<\/b><\/p>\n

L\u00ea Th\u1ecb \u0110i\u1ec3m S\u01b0\u01a1ng1, V\u00f5 V\u0103n Minh1, Nguy\u1ec5n Th\u1ecb Kim Y\u1ebfn2 <\/b><\/p>\n

1Tr\u01b0\u1eddng \u0110H S\u01b0 ph\u1ea1m – \u0110H \u0110\u00e0 N\u1eb5ng; 2H\u1ed9i \u0110\u1ed9ng v\u1eadt h\u1ecdc Frankfurt t\u1ea1i Vi\u1ec7t Nam<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Nghi\u00ean c\u1ee9u t\u1eadp trung v\u00e0o ph\u00e2n t\u00edch hi\u1ec7n tr\u1ea1ng qu\u1ea7n th\u1ec3 D\u1eeba n\u01b0\u1edbc (Nipa fruticans <\/i>Wurmb) t\u1ea1i x\u00e3 Tam Ngh\u0129a, huy\u1ec7n N\u00fai Th\u00e0nh, t\u1ec9nh Qu\u1ea3ng Nam v\u00e0 \u0111\u1ec1 xu\u1ea5t gi\u1ea3i ph\u00e1p ph\u00e1t tri\u1ec3n. Di\u1ec7n t\u00edch d\u1eeba n\u01b0\u1edbc c\u00f2n kho\u1ea3ng 6,3 hecta, t\u1eadp trung ph\u00e2n b\u1ed1 d\u1ecdc tr\u00ean l\u01b0u v\u1ef1c s\u00f4ng Tr\u1ea7u v\u00e0 s\u00f4ng B\u1ebfn \u0110\u00ecnh. M\u1eadt \u0111\u1ed9 d\u1eeba n\u01b0\u1edbc ph\u00e2n b\u1ed1 t\u1ea1i khu v\u1ef1c s\u00f4ng B\u1ebfn \u0110\u00ecnh trung b\u00ecnh l\u00e0 1,79 c\u00e2y\/m2 v\u00e0 t\u1ea1i khu v\u1ef1c s\u00f4ng Tr\u1ea7u l\u00e0 2,03 c\u00e2y\/m2. Di\u1ec7n t\u00edch d\u1eeba n\u01b0\u1edbc gi\u1ea3m m\u1ea1nh t\u1eeb n\u0103m 1990 – 2010, giai \u0111o\u1ea1n 2010 – 2015 di\u1ec7n t\u00edch d\u1eeba n\u01b0\u1edbc c\u00f3 xu h\u01b0\u1edbng t\u0103ng nh\u1eb9. S\u1ef1 suy gi\u1ea3m di\u1ec7n t\u00edch r\u1eebng D\u1eeba n\u01b0\u1edbc \u1edf x\u00e3 Tam Ngh\u0129a c\u00f3 nguy\u00ean nh\u00e2n ch\u00ednh t\u1eeb vi\u1ec7c ph\u00e1 r\u1eebng D\u1eeba n\u01b0\u1edbc \u0111\u1ec3 l\u1ea5y di\u1ec7n t\u00edch nu\u00f4i th\u1ee7y s\u1ea3n v\u00e0 s\u1ea3n xu\u1ea5t n\u00f4ng nghi\u1ec7p. Vi\u1ec7c khai th\u00e1c v\u00e0 qu\u1ea3n l\u00fd ngu\u1ed3n t\u00e0i nguy\u00ean d\u1eeba n\u01b0\u1edbc ch\u01b0a hi\u1ec7u qu\u1ea3, c\u1ea7n c\u00f3 k\u1ebf ho\u1ea1ch tr\u1ed3ng ph\u1ee5c h\u1ed3i di\u1ec7n t\u00edch qu\u1ea7n th\u1ec3 d\u1eeba n\u01b0\u1edbc \u0111\u1ec3 ph\u1ee7 xanh di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb b\u1ecf hoang t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng; C\u00f3 \u0111\u1ecbnh h\u01b0\u1edbng khai th\u00e1c v\u00e0 s\u1eed d\u1ee5ng h\u1ee3p l\u00fd ngu\u1ed3n l\u1ee3i d\u1eeba n\u01b0\u1edbc, ch\u00fa tr\u1ecdng \u0111\u1ebfn vi\u1ec7c x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh qu\u1ea3n l\u00fd D\u1eeba n\u01b0\u1edbc d\u1ef1a v\u00e0o c\u1ed9ng \u0111\u1ed3ng, \u0111\u1ed3ng th\u1eddi khai th\u00e1c ti\u1ec1m n\u0103ng du l\u1ecbch sinh th\u00e1i t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>H\u1ec7 sinh th\u00e1i D\u1eeba n\u01b0\u1edbc, r\u1eebng ng\u1eadp m\u1eb7n, s\u00f4ng B\u1ebfn \u0110\u00ecnh, s\u00f4ng Tr\u1ea7u, x\u00e3 Tam Ngh\u0129a<\/td>\n<\/tr>\n

Study on the status of Nipa palm (Nipa fruticans <\/i>Wurmb) populations in Tam Nghia wards, Nui Thanh district, Quang Nam province and propose solutions for sustainable management of natural resources <\/b><\/p>\n

The research focused on analyzing the status of Nipa palm (Nipa fruticans <\/i>Wurmb) populations in Tam Nghia wards, Nui Thanh district, Quang Nam province and proposed solutions for developing. The results showed that there were 6.3 hectares of the Nipa palm area. The Nipa palm\u2019s distribution is along the Trau River and Ben Dinh Rivers. The average density was 1.79 plants\/<\/b>m2 in Ben Dinh River area, and 2.03 plants\/m2 in Trau Rivers area respectively. The Nipa palm area had dropped sharply from 1990 to 2010. And a slight increase in periods 2010 – 2015. Deforestation for aquaculture and agriculture was the main cause for Nipa palm area decline. The Nipa palm resources exploitation and management were not effective. This research highlights need for recovering the Nipa palm forest in the abandoned land. The utilization of Nipa palm resource should be more effective by diversity products. The research also suggest to Build the model of “Community-Based Natural Resources Management” for Nipa palm resource and exploit the potential of ecotourism in this area.<\/p>\n

Keywords: <\/i><\/b>Ben Dinh River, mangroves, Nipa palm ecosystems, Tam Nghia wards, Trau River<\/p>\n

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NGHI\u00caN C\u1ee8U PH\u00c2N LO\u1ea0I C\u00c1C KI\u1ec2U TH\u1ea2M TH\u1ef0C V\u1eacT R\u1eeaNG T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN NA HANG B\u1eb0NG \u1ea2NH V\u1ec6 TINH SPOT 6<\/b><\/p>\n

Ph\u1ea1m Quang Tuy\u1ebfn, Ph\u1ea1m Ti\u1ebfn D\u0169ng, Nguy\u1ec5n Huy Ho\u00e0ng <\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean (KBTTN) Na Hang thu\u1ed9c t\u1ec9nh Tuy\u00ean Quang c\u00f3 \u0111\u1ecba h\u00ecnh n\u00fai \u0111\u00e1 hi\u1ec3m tr\u1edf, xen l\u1eabn h\u1ed3 th\u1ee7y \u0111i\u1ec7n ph\u1ee9c t\u1ea1p, vi\u1ec7c \u0111i\u1ec1u tra ph\u00e2n lo\u1ea1i th\u1ea3m th\u1ef1c v\u1eadt tr\u00ean th\u1ef1c \u0111\u1ecba g\u1eb7p r\u1ea5t nhi\u1ec1u kh\u00f3 kh\u0103n. Do \u0111\u00f3, vi\u1ec7c \u0111\u00e1nh gi\u00e1 v\u00e0 ph\u00e2n chia th\u1ea3m th\u1ef1c v\u1eadt t\u1ea1i KBTTN Na Hang b\u1eb1ng \u1ea3nh v\u1ec7 tinh SPOT 6 l\u00e0 h\u01b0\u1edbng \u0111i c\u1ea7n thi\u1ebft. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ef1a tr\u00ean vi\u1ec7c gi\u1ea3i \u0111o\u00e1n \u1ea3nh v\u1ec7 tinh SPOT 6 \u0111\u00e3 ph\u00e2n lo\u1ea1i \u0111\u01b0\u1ee3c th\u1ea3m th\u1ef1c v\u1eadt, ph\u00e2n b\u1ed1 tr\u00ean 2 \u0111ai cao >700m v\u00e0 \u2264700m. Trong \u0111\u00f3 r\u1eebng t\u1ef1 nhi\u00ean chi\u1ebfm 94,6% t\u1ed5ng di\u1ec7n t\u00edch khu b\u1ea3o t\u1ed3n. R\u1eebng tr\u00ean n\u00fai \u0111\u00e1 v\u00f4i chi\u1ebfm 69,4% t\u1ed5ng di\u1ec7n t\u00edch KBTTN v\u1edbi di\u1ec7n t\u00edch 15.072,8ha. D\u1ef1a tr\u00ean h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i r\u1eebng \u00e1p d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam, KBTTN Na Hang c\u00f3 2 ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt ch\u00ednh l\u00e0 th\u1ea3m th\u1ef1c v\u1eadt t\u1ef1 nhi\u00ean v\u00e0 th\u1ea3m th\u1ef1c v\u1eadt nh\u00e2n t\u00e1c. Trong 2 ki\u1ec3u r\u1eebng ch\u00ednh \u0111\u00e3 ph\u00e2n chia ra 7 ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng t\u1ef1 nhi\u00ean v\u00e0 3 ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt nh\u00e2n t\u00e1c. K\u1ebft qu\u1ea3 ph\u00e2n lo\u1ea1i \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c b\u1ea3n \u0111\u1ed3 th\u1ea3m th\u1ef1c v\u1eadt cho KBTTN Na Hang v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ea1t 90,4%<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>\u1ea2nh v\u1ec7 tinh SPOT 6, \u0111a d\u1ea1ng, ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng<\/p>\n

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Research of forest vegetation classification on na hang nature reserve by spot 6 satellite image interpretation <\/b><\/p>\n

Nature reserve Na Hang with high biological diversity, complex terrain. Therefore, the evaluation of a variety of forest vegetation in the Na Hang Nature Reserve in SPOT 6 satellite images are necessary direction. The study was carried out based on the results of satellite image interpretation (SPOT 6) for classification. It was identified 20 forest types under Circular 34\/2009\/TT-BNN&PTNT distributed in two elevations >700m and < 700m. In which, natural forest types were major with 94.6% of total area of Na Hang Nature Reserve and mainly distributed in limestone mountains with 15,072.8 ha (accounted for 69.4% total area). Based on the results\u2019 classification forest vegetation by Nguyen Nghia Thin (2006) and Thai Van Trung (1978), the study identified two main types of vegetation including natural forest vegetation and effacted by human vegetation, in which these types were classified into 7 types of natural forest vegetation and 3 types of effected by human vegetation. Vegetation map for Na Hang Nature Reserve was established based on results\u2019s forest vegetation classification with accuracy rate being 90.4% when testing in the field.<\/p>\n

Keywords: <\/i><\/b>SPOT 6 satellite image, biodiversity, forest vegetation type<\/p>\n

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NGHI\u00caN C\u1ee8U L\u00c2 P BI\u1ec2U TH\u1ec2 T\u00cdCH TH\u00d4NG BA L\u00c1 (Pinus kesiya <\/i>Royle ex.Gordon) \u1ede H\u00c0 GIANG<\/b><\/p>\n

Ph\u1ea1m Quang Tuy\u1ebfn, B\u00f9i Thanh H\u1eb1ng, Tr\u1ea7n Ho\u00e0ng Qu\u00fd, Nguy\u1ec5n Th\u1ecb Thu Ph\u01b0\u01a1ng, Nguy\u1ec5n Kim Trung, Nguy\u1ec5n Quang H\u01b0ng <\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

Nghi\u00ean c\u1ee9u l\u1eadp bi\u1ec3u th\u1ec3 t\u00edch Th\u00f4ng ba l\u00e1 (Pinus kesiya <\/i>Royle ex.Gordon) <\/i>\u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf T\u00e2y Nguy\u00ean. Tuy nhi\u00ean, c\u00f9ng m\u1ed9t lo\u00e0i c\u00e2y, t\u1ea1i m\u1ed7i v\u00f9ng sinh th\u00e1i c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng v\u00e0 h\u00ecnh d\u1ea1ng th\u00e2n c\u00e2y kh\u00e1c nhau, n\u00ean c\u1ea7n ph\u1ea3i x\u00e2y d\u1ef1ng bi\u1ec3u th\u1ec3 t\u00edch theo c\u00e1c v\u00f9ng sinh th\u00e1i kh\u00e1c nhau. H\u00e0 Giang l\u00e0 m\u1ed9t t\u1ec9nh ph\u00eda B\u1eafc c\u00f3 c\u00e2y Th\u00f4ng ba l\u00e1 ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean v\u00e0 \u0111\u01b0\u1ee3c tr\u1ed3ng t\u1eeb r\u1ea5t l\u00e2u, do \u0111\u00f3 c\u1ea7n x\u00e2y d\u1ef1ng bi\u1ec3u th\u1ec3 t\u00edch \u0111\u1ec3 t\u00ednh to\u00e1n s\u1ea3n l\u01b0\u1ee3ng v\u00e0 tr\u1eef l\u01b0\u1ee3ng r\u1eebng. Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng 59 c\u00e2y gi\u1ea3i t\u00edch trong \u0111\u00f3 46 c\u00e2y d\u00f9ng \u0111\u1ec3 t\u00ednh to\u00e1n l\u1eadp bi\u1ec3u, 13 c\u00e2y s\u1eed d\u1ee5ng ki\u1ec3m tra bi\u1ec3u. Trong qu\u00e1 tr\u00ecnh l\u1eadp bi\u1ec3u c\u00f3 s\u1eed d\u1ee5ng 5 d\u1ea1ng ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ec3 t\u00ednh to\u00e1n, k\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng tr\u00ecnh d\u00f9ng \u0111\u1ec3 l\u1eadp bi\u1ec3u theo d\u1ea1ng V = 0,00006439*(D2H)0,942 l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t. S\u1eed d\u1ee5ng c\u00e1c c\u00e2y ti\u00eau chu\u1ea9n kh\u00f4ng tham gia v\u00e0o qu\u00e1 tr\u00ecnh l\u1eadp bi\u1ec3u \u0111\u1ec3 ki\u1ec3m nghi\u1ec7m bi\u1ec3u th\u1ec3 t\u00edch 2 nh\u00e2n t\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eadp v\u1edbi sai s\u1ed1 b\u00ecnh qu\u00e2n \u00b110%, sai s\u1ed1 n\u00e0y c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong \u0111i\u1ec1u tra r\u1eebng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u bi\u1ec3u th\u1ec3 t\u00edch 2 nh\u00e2n t\u1ed1 Th\u00f4ng ba l\u00e1 \u1edf H\u00e0 Giang l\u00e0 c\u01a1 s\u1edf quan tr\u1ecdng cho vi\u1ec7c \u1ee9ng d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n s\u1ea3n l\u01b0\u1ee3ng v\u00e0 tr\u1eef l\u01b0\u1ee3ng r\u1eebng Th\u00f4ng ba l\u00e1 t\u1ea1i H\u00e0 Giang<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Bi\u1ec3u th\u1ec3 t\u00edch, H\u00e0 Giang, Th\u00f4ng ba l\u00e1<\/p>\n

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Research on volume table establishment of Pinus kesiya <\/i>in Ha Giang <\/b><\/p>\n

Volume table of Pinus kesiya <\/i>had been established in the Central Highland. However, the same species may growth and form different shape in different ecological regions. Therefore application of the established table in other ecological regions needs to calibrate or establish newly one for approximating. Ha Giang province located in the North, in which Pinus kesiya <\/i>species are distributed naturally and planted long time, therefore, it is essential to establish volume table for the species in order to evaluate forest yield. A new two factor volume table of Pinus kesiya <\/i>has been established for Ha Giang province based on 59 analysed trees, of which 46 trees used to fit the suitable equation and 13 remain trees used to test them. The equation V = 0,00006439*(D2H)0,942 which has an average errors of \u00b110% has been choose to build the volume table. These two factor volume table has an acceptable error and can be used for calculating forest yield and volume in Ha Giang province.<\/p>\n

Keywords: <\/i><\/b>Ha Giang, Pinus kesiya, <\/i>volume table<\/p>\n

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NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A PH\u01af\u01a0NG TH\u1ee8C X\u1eec L\u00dd TH\u1ef0C B\u00cc \u0110\u1ebeN T\u1ef6 L\u1ec6 S\u1ed0NG V\u00c0 SINH TR\u01af\u1edeNG C\u1ee6A 2 LO\u00c0I V\u1ed0I THU\u1ed0C Schima wallichii <\/i>Choisy V\u00c0 Schima superba <\/i>Gardn. Et Champ T\u1ea0I S\u01a0N LA V\u00c0 GIA LAI<\/b><\/p>\n

\u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u, L\u00ea Th\u1ecb H\u1ea1nh, L\u00f2 Quang Th\u00e0nh <\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/p>\n

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

Th\u00ed nghi\u1ec7m \u1ea3nh h\u01b0\u1edfng c\u1ee7a x\u1eed l\u00fd th\u1ef1c b\u00ec \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a 2 lo\u00e0i V\u1ed1i thu\u1ed1c (Schima wallichii <\/i>Choisy v\u00e0 Schima superba <\/i>Gardn. Et Champ) \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb 2013-2016 v\u1edbi 3 c\u00f4ng th\u1ee9c: X\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n; x\u1eed l\u00fd th\u1ef1c b\u00ec theo b\u0103ng v\u00e0 x\u1eed l\u00fd th\u1ef1c b\u00ec c\u1ee5c b\u1ed9. Sau 3 n\u0103m, t\u1ef7 l\u1ec7 s\u1ed1ng, t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u1ed5 r\u1ec5 v\u00e0 t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh t\u00e1n l\u00e1 cao nh\u1ea5t \u0111\u01b0\u1ee3c ghi nh\u1eadn \u1edf c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n v\u00e0 th\u1ea5p nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec c\u1ee5c b\u1ed9 cho c\u1ea3 2 lo\u00e0i. \u0110\u1ed1i v\u1edbi chi\u1ec1u cao, t\u0103ng tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u1edf c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec c\u1ee5c b\u1ed9 cho lo\u00e0i S. superba <\/i>t\u1ea1i Gia Lai v\u00e0 \u1edf c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n \u0111\u1ed1i v\u1edbi S. wallichii <\/i>t\u1ea1i S\u01a1n La. Tuy v\u1eady, s\u1ef1 kh\u00e1c nhau v\u1ec1 t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng kh\u00f4ng kh\u00e1c nhau \u1edf m\u1ee9c th\u1ed1ng k\u00ea gi\u1eefa 2 c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n v\u00e0 x\u1eed l\u00fd th\u1ef1c b\u00ec c\u1ee5c b\u1ed9 (P>0,05), nh\u01b0ng 2 c\u1ea3 c\u00f4ng th\u1ee9c n\u00e0y \u0111\u1ec1u cho k\u1ebft qu\u1ea3 kh\u00e1c nhau \u1edf m\u1ee9c th\u1ed1ng k\u00ea (P < 0,06) v\u1edbi c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec theo r\u1ea1ch.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>X\u1eed l\u00fd th\u1ef1c b\u00ec, Schima wallichii <\/i>Choisy, Schima superba <\/i>Gardn. Et Champ.<\/p>\n

 <\/td>\n<\/tr>\n

Effects of vegetation treatment on the survival and growth of Schima wallichii <\/i>Choisy and Schima superba <\/i>Gardn. Et Champ in Son La and Gia Lai provinces <\/b><\/p>\n

Effects of three different vegetation treatments on the survival and growth of Schima wallichii <\/i>Choisy and Schima superba <\/i>Gardn. Et Champ were examined in Son La and Gia Lai provinces during 2013-2016. The three vegetation treatments including (i) completely weeded by slashing, (ii) partly weeded around planting holes with diameter of 2m and (iii) line weeded with 2m in width and leaving unweeded with 1m in width interval. Three years after experiment the higest survival, basal diameter and seedling crown increments were recorded in completed weeded treatment for both species. While higest increments of total height were found in partly weeded treatment for S. superba <\/i>in Gia Lai and in completely weeded for S. wallichii <\/i>in Son La. The differences of survival rate and growth parametrs were not significant when comparision between completely weeded and partly weeded treatments (P>0.05). However, the survival rate and growth parameters of the seedlings in those 2 treatments were significaltly better compared to that in line weeded (P < 0.05).<\/p>\n

Keywords: <\/i><\/b>Schima wallichii <\/i>Choisy, Schima superba <\/i>Gardn. Et Champ, vegetation control<\/p>\n

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

\u0110\u00c1NH GI\u00c1 NGUY C\u01a0 T\u1ed4N TH\u01af\u01a0NG V\u00d9NG VEN BI\u1ec2N D\u01af\u1edaI T\u00c1C \u0110\u1ed8NG C\u1ee6A BI\u1ec2N \u0110\u1ed4I KH\u00cd H\u1eacU T\u1ea0I HUY\u1ec6N TH\u00c1I TH\u1ee4Y, T\u1ec8NH TH\u00c1I B\u00ccNH<\/b><\/p>\n

Nguy\u1ec5n H\u1ea3i H\u00f2a, Tr\u1ea7n Th\u1ecb Thanh T\u00e2m <\/b><\/p>\n

Tr\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

Qu\u00e1 tr\u00ecnh kh\u1ea3o s\u00e1t d\u1ecdc tuy\u1ebfn ven bi\u1ec3n, d\u1ef1a v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m \u0111\u1ecba h\u00ecnh, \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean v\u00e0 kinh t\u1ebf x\u00e3 h\u1ed9i, nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ecdn 3 nh\u00f3m ch\u1ec9 s\u1ed1 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 nguy c\u01a1 t\u1ed5n th\u01b0\u01a1ng: (i) ch\u1ec9 s\u1ed1 v\u1ec1 \u0111\u1ecba h\u00ecnh v\u00e0 \u0111\u1ecba m\u1ea1o; (ii) ch\u1ec9 s\u1ed1 v\u1ec1 sinh th\u00e1i v\u00e0 m\u00f4i tr\u01b0\u1eddng v\u00e0 (iii) ch\u1ec9 s\u1ed1 v\u1ec1 kinh t\u1ebf v\u00e0 x\u00e3 h\u1ed9i. M\u1ed7i ch\u1ec9 s\u1ed1 t\u1ed5n th\u01b0\u01a1ng \u0111\u01b0\u1ee3c cho \u0111i\u1ec3m t\u1eeb 1 \u0111\u1ebfn 5. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y t\u1ed5ng s\u1ed1 chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng b\u1edd ven bi\u1ec3n l\u00e0 21,3km, trong \u0111\u00f3 c\u00f3 15,2km \u0111\u01b0\u1eddng b\u1edd m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u01b0\u01a1ng th\u1ea5p; 3,2km m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u01b0\u01a1ng trung b\u00ecnh; 2km m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u01b0\u01a1ng cao v\u00e0 0,8km \u0111\u01b0\u1eddng b\u1edd bi\u1ec3n c\u00f3 m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u01b0\u01a1ng r\u1ea5t cao. Khu v\u1ef1c c\u00f3 m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u01b0\u01a1ng l\u1edbn nh\u1ea5t l\u00e0 khu v\u1ef1c \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a x\u00e3 Th\u00e1i Th\u01b0\u1ee3ng, n\u01a1i ti\u1ebfp gi\u00e1p v\u1edbi Th\u1ecb tr\u1ea5n Di\u00eam \u0110i\u1ec1m v\u00e0 b\u00ean b\u1edd s\u00f4ng Di\u00eam H\u1ed9, t\u1ea1i \u0111\u00e2y c\u00f3 th\u1ea3m th\u1ef1c v\u1eadt th\u01b0a th\u1edbt, c\u00f3 \u0111\u1ed9 x\u00f3i m\u00f2n cao, c\u1ea5u tr\u00fac b\u1ea3o v\u1ec7 c\u00f2n k\u00e9m. Ngo\u00e0i ra, khu v\u1ef1c th\u1ecb tr\u1ea5n Di\u00eam \u0110i\u1ec1m c\u0169ng n\u1eb1m trong m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u01b0\u01a1ng cao, do khu v\u1ef1c n\u00e0y h\u1ea7u h\u1ebft t\u1eadp trung \u0111\u00f4ng d\u00e2n l\u00e0m ngh\u1ec1 kinh doanh, bu\u00f4n b\u00e1n, \u0111\u1ed9 r\u1ed9ng r\u1eebng ng\u1eadp m\u1eb7n l\u00e0 r\u1ea5t \u00edt, h\u1ec7 th\u1ed1ng \u0111\u00ea bao \u0111ang xu\u1ed1ng c\u1ea5p d\u1ea7n, n\u01a1i \u0111\u00e2y l\u1ea1i ti\u1ebfp gi\u00e1p c\u1eeda s\u00f4ng \u0111\u1ed5 ra bi\u1ec3n, do \u0111\u00f3, c\u00f3 th\u1ec3 n\u00f3i \u0111\u00e2y l\u00e0 n\u01a1i c\u00f3 nguy c\u01a1 cao s\u1ebd x\u1ea3y ra c\u00e1c tai bi\u1ebfn nguy hi\u1ec3m. Ng\u01b0\u1ee3c l\u1ea1i, t\u1ea1i khu v\u1ef1c x\u00e3 Th\u1ee5y Tr\u01b0\u1eddng, Th\u1ee5y Xu\u00e2n, Th\u1ee5y H\u1ea3i l\u1ea1i c\u00f3 m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u01b0\u01a1ng th\u1ea5p nh\u1ea5t, do t\u1ea1i \u0111\u00e2y c\u00f3 \u0111\u1ed9 r\u1ed9ng r\u1eebng ng\u1eadp m\u1eb7n l\u1edbn v\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u, t\u1ed1c \u0111\u1ed9 b\u1ed3i t\u1ee5 l\u1edbn, h\u1ec7 th\u1ed1ng \u0111\u00ea bao v\u1eefng ch\u1eafc, \u0111\u1ea3m b\u1ea3o an to\u00e0n, d\u00e2n s\u1ed1 c\u00e1ch xa \u0111\u00ea bi\u1ec3n.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, ch\u1ec9 s\u1ed1, gi\u1ea3m thi\u1ec3u, th\u00edch \u1ee9ng, t\u1ed5n th\u01b0\u01a1ng, v\u00f9ng ven bi\u1ec3n<\/p>\n

 <\/td>\n<\/tr>\n

Assessing coastal vulnerabilities to climate change impacts in Thai Thuy district, Thai Binh province <\/b><\/p>\n

Based on coastal topographical features and natural conditions, 3 groups of indices were selected to assess the coastal vulnerability, including (i) topographical and geomorphological indices; (ii) ecological and environmental indices; and (iii) socio-economic indices. As results showed that the total length of coastal shorelines is 21.3km, including 15.2km coastline with low level of vulnerability; 3.2km with average level of vulnerability; 2km high with level of vulnerability; and 0.8km of coastline with a very high level of vulnerability. Areas with the greatest vulnerability to climate change is the area of Thai Thuong commune, where are adjacent to the Diem Diem town and Diem Ho river side. These areas are identified with sparse vegetation and a high erosion, and relatively weak coastal protection structures. In addition, the Diem Diem town also is classified as the high degree of vulnerability, because the area is known as highly populated areas with intensive business and trading activities and with thin mangrove width. Moreover, the dykes in these areas are being degraded gradually in where the adjacent estuary meets the sea. Therefore, this area will be the highly vulnerable to climate change. In contrast, Thuy Truong, Thuy Xuan and Thuy Hai have the lowest level of vulnerability due to a large and thick mangrove width and relatively uniform, large deposition rate, firm and safe dyke systems; and local people are living far away from the sea dike these areas.<\/p>\n

Keywords: <\/i><\/b>Adaptation, Climate change, coastal areas, index, mitigation, vulnerability<\/p>\n

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T\u1ea0O R\u1eeaNG V\u1ed0I THU\u1ed0C B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P GIEO H\u1ea0T TH\u1eb2NG V\u00c0 KHOANH NU\u00d4I X\u00daC TI\u1ebeN T\u00c1I SINH<\/b><\/p>\n

\u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u1, D\u01b0\u01a1ng Quang Trung1, Tr\u1ea7n Quang Trung2<\/b><\/p>\n

1 Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam 2 Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p T\u00e2y B\u1eafc<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

T\u1ea1o r\u1eebng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gieo h\u1ea1t th\u1eb3ng v\u00e0 khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh lo\u00e0i V\u1ed1i thu\u1ed1c Schima wallichii <\/i>Choisy \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i x\u00e3 Chi\u1ec1ng B\u00f4m, huy\u1ec7n Thu\u1eadn Ch\u00e2u, t\u1ec9nh S\u01a1n La, trong th\u1eddi gian (2013-2016). Sau g\u1ea7n 4 n\u0103m gieo h\u1ea1t, s\u1ed1 h\u1ed1 c\u00f3 c\u00e2y m\u1ecdc \u0111\u1ea1t 68,8%, t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1eadt \u0111\u1ed9 1.720 c\u00e2y\/ha, t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh h\u00e0ng n\u0103m v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y (D0.0) l\u00e0 0,54 cm\/n\u0103m; chi\u1ec1u cao 0,42 m\/n\u0103m v\u00e0 \u0111\u01b0\u1eddng k\u00ednh t\u00e1n l\u00e1 0,34 m\/n\u0103m. Th\u00ed nghi\u1ec7m khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean tr\u1ea1ng th\u00e1i \u0111\u1ea5t tr\u1ed1ng sau n\u01b0\u01a1ng r\u1eaby v\u1edbi c\u00e1c th\u1eddi gian b\u1ecf ho\u00e1 3 n\u0103m, 5 n\u0103m v\u00e0 9 n\u0103m kh\u00e1c nhau. Sau 4 n\u0103m th\u00ed nghi\u1ec7m, m\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh \u0111\u1ec3 l\u1ea1i \u1edf c\u00e1c tr\u1ea1ng th\u00e1i tr\u00ean l\u00e0 1.266 c\u00e2y\/ha; 1.150 c\u00e2y\/ha v\u00e0 860 c\u00e2y\/ha. \u0110\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y \u0111\u1ea1t 3,41cm; 5,54cm v\u00e0 9,28cm; chi\u1ec1u cao c\u00e2y \u0111\u1ea1t 2,96m; 3,89m v\u00e0 6,07m; \u0111\u01b0\u1eddng k\u00ednh t\u00e1n l\u00e1 \u0111\u1ea1t 2,00m; 2,58m v\u00e0 2,96m t\u01b0\u01a1ng \u1ee9ng cho c\u00e1c tr\u1ea1ng th\u00e1i \u0111\u1ea5t b\u1ecf n\u01b0\u01a1ng hoang 3 n\u0103m, 5 n\u0103m v\u00e0 9 n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Gieo h\u1ea1t th\u1eb3ng, khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh, Schima wallichii <\/i>Choisy<\/p>\n

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Restoration of Schima wallichii <\/i>Choisy and Schima superba <\/i>Gardn. Et Champ forests using assisted natural regeneration and direct sowing <\/b><\/p>\n

Two experiments to restore forest of Schima wallichii <\/i>were conducted using dirrect sowing and assisted natural regeneration in Chieng Bom Commune, Thuan Chau District, Son La province in Vietnam during 2013-2016. In direct sowing area, four years after sowing the seeds, there was 68% of sowing holes has seedlings, giving 1,720 seedlings ha-1. The annual increments of growth parameters were 0.54cm year-1, 0.42m year-1 and 0.34m year-1 for basal diameter, total height and diameter of seedling crown, respectively. The assisted natural regeneration experiment was conducted in different abandon farm land on the hill for 3, 5 and 9 years. Four years after treatment, with densities of natural regeneration seedlings with 1266, 1150 and 860 seedlings ha-1 for 3, 5 and 9 years of abandon farm land, respectively. The stem diameters of seedlings were 3.41cm, 5.54cm and 9.28cm, total heights were 2.96m, 3.89m and 6.07m and diameter of seedling crowns were 2.00m, 2.58m and 2.96m for 3, 5 and 9 years of abandon farm land, respectively.<\/p>\n

Keywords: <\/i><\/b>Assisted natural regeneration, direct sowing, Schima wallichii <\/i>Choisy<\/p>\n

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S\u00c2U H\u1ea0I CH\u00cdNH R\u1eeaNG TR\u1ed2NG G\u00c1O TR\u1eaeNG (Neolamerckia cadamba<\/i>) V\u00c0 G\u00c1O V\u00c0NG (Nauclea orientalia) <\/i>T\u1ea0I T\u1ec8NH C\u00c0 MAU<\/b><\/p>\n

Ph\u1ea1m Quang Thu1, L\u00ea V\u0103n B\u00ecnh1, V\u00f5 Ng\u01b0\u01a1n Th\u1ea3o2, Nguy\u1ec5n Minh Ch\u00ed1<\/b><\/p>\n

\u00a0<\/b>1 Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam 2 Trung t\u00e2m Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p T\u00e2y Nam B\u1ed9, 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

S\u1eed d\u1ee5ng c\u00e2y b\u1ea3n \u0111\u1ecba nh\u01b0 G\u00e1o tr\u1eafng v\u00e0 G\u00e1o v\u00e0ng cho tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7 l\u1edbn \u0111ang \u0111\u01b0\u1ee3c khuy\u1ebfn kh\u00edch \u1edf Vi\u1ec7t Nam, t\u1eadp trung nhi\u1ec1u \u1edf c\u00e1c t\u1ec9nh ph\u00eda Nam. R\u1eebng tr\u1ed3ng G\u00e1o tr\u1eafng, G\u00e1o v\u00e0ng t\u1ea1i U Minh, C\u00e0 Mau \u0111\u00e3 x\u1ea3y ra d\u1ecbch s\u00e2u h\u1ea1i li\u00ean ti\u1ebfp trong 2 n\u0103m li\u1ec1n 2015 v\u00e0 2016. S\u00e2u cu\u1ed1n l\u00e1 (Arthroschista hilaralis<\/i>) v\u00e0 S\u00e2u \u0103n l\u00e1 (Moduza procris <\/i>Cramer) \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 hai lo\u00e0i s\u00e2u h\u1ea1i ch\u00ednh thu\u1ed9c b\u1ed9 C\u00e1nh v\u1ea3y. R\u1eebng tr\u1ed3ng G\u00e1o tr\u1eafng b\u1ecb S\u00e2u \u0103n l\u00e1 (M. procris<\/i>) g\u00e2y h\u1ea1i nh\u1eb9 nh\u01b0ng S\u00e2u cu\u1ed1n l\u00e1 (A. hilaralis<\/i>) g\u00e2y h\u1ea1i n\u1eb7ng \u0111\u1ebfn r\u1ea5t n\u1eb7ng. R\u1eebng tr\u1ed3ng G\u00e1o v\u00e0ng, t\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb h\u1ea1i \u0111\u1ed1i v\u1edbi S\u00e2u cu\u1ed1n l\u00e1 th\u00ec nh\u1ecf nh\u01b0ng n\u1eb7ng v\u00e0 r\u1ea5t n\u1eb7ng \u0111\u1ed1i v\u1edbi S\u00e2u \u0103n l\u00e1 (M. procris<\/i>). T\u1ef7 l\u1ec7 v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb h\u1ea1i do S\u00e2u cu\u1ed1n l\u00e1 v\u00e0 S\u00e2u \u0103n l\u00e1 c\u00f2n t\u00f9y thu\u1ed9c v\u00e0o tu\u1ed5i r\u1eebng. R\u1eebng non d\u01b0\u1edbi 5 tu\u1ed5i th\u01b0\u1eddng b\u1ecb h\u1ea1i n\u1eb7ng h\u01a1n r\u1eebng tr\u00ean 10 tu\u1ed5i.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>S\u00e2u cu\u1ed1n l\u00e1, S\u00e2u \u0103n l\u00e1, G\u00e1o tr\u1eafng, G\u00e1o v\u00e0ng<\/p>\n

 <\/td>\n<\/tr>\n

Main insect pests damaging Neolamerckia cadamba <\/i>and Nauclea orientalia <\/i>plantations in Ca Mau province <\/b><\/p>\n

Using native tree species, such as Neolamarckia cadamba <\/i>and Nauclea orientalis<\/i>, for sawlog afforestation is being encouraged in Vietnam, especially in the Southern provinces. Outbreaks of insect pests to plantations of these species at U Minh, Ca Mau have occurred consecutively in 2015 and in 2016. Leafroller (Arthroschista hilaralis<\/i>) and leaf-eating caterpillar (Moduza procris<\/i>) were identified as major lepidopteran pests. To Neolamarckia cadamba <\/i>plantations, M. procris <\/i>caused minor damage to the crowns of the trees but A. hilaralis <\/i>caused heavy to very heavy damage. To Nauclea orientalis <\/i>plantations, damage incidence and severity was minor by A. hilaralis <\/i>but damage was heavy to very heavy by M. procris<\/i>. The damage incidence and severity depended on tree age – young plantations under 5 years were often more severely damaged than plantations over 10 years old<\/p>\n

Keywords: <\/i><\/b>Arthroschista hilaralis, Moduza procris, Nauclea orientalis, Neolamarckia cadamba<\/i><\/p>\n

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

X\u00c1C \u0110\u1ecaNH \u0110\u1ed2NG TH\u1edcI THEOBROMINE, THEOPHYLLINE V\u00c0 CAFFEINE TRONG S\u1ea2N PH\u1ea8M CH\u00c8 \u1ede M\u1ed8T S\u1ed0 T\u1ec8NH PH\u00cdA B\u1eaeC VI\u1ec6T NAM B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P S\u1eaeC K\u00dd L\u1eceNG HI\u1ec6U N\u0102NG CAO (HPLC)<\/b><\/p>\n

\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc, Ho\u00e0ng Trung Hi\u1ebfu<\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng – Vi\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

Nghi\u00ean c\u1ee9u n\u00e0y s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p s\u1eafc k\u00fd l\u1ecfng hi\u1ec7u n\u0103ng cao (HPLC) v\u1edbi detector UV-Vis \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed3ng th\u1eddi h\u00e0m l\u01b0\u1ee3ng theobromine, theophylline (TB, TP v\u00e0 CF) v\u00e0 caffeine trong s\u1ea3n ph\u1ea9m ch\u00e8 \u1edf 4 t\u1ec9nh g\u1ed3m c\u00f3 Ph\u00fa Th\u1ecd, Th\u00e1i Nguy\u00ean, L\u00e0o Cai v\u00e0 Ngh\u1ec7 An. Qu\u00e1 tr\u00ecnh t\u00e1ch \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi c\u1ed9t LiChrospher 100 RP – 18 (5\u03bcm) s\u1eed d\u1ee5ng pha \u0111\u1ed9ng (15\/85) = (ACN\/ n\u01b0\u1edbc deion) v\u1edbi t\u1ed1c \u0111\u1ed9 0,8ml\/ph\u00fat v\u00e0 b\u01b0\u1edbc s\u00f3ng ph\u00e1t hi\u1ec7n 271nm. Ph\u01b0\u01a1ng ph\u00e1p cho gi\u1edbi h\u1ea1n ph\u00e1t hi\u1ec7n c\u1ee7a TB, TP v\u00e0 CF l\u1ea7n l\u01b0\u1ee3t l\u00e0: 1,48ppm, 1,41ppm v\u00e0 1,41ppm v\u00e0 gi\u1edbi h\u1ea1n \u0111\u1ecbnh l\u01b0\u1ee3ng l\u1ea7n l\u01b0\u1ee3t l\u00e0: 4,49 ppm, 4,27ppm v\u00e0 4,29ppm. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch m\u1eabu th\u1ef1c cho th\u1ea5y c\u00e1c \u0111\u1ecba \u0111i\u1ec3m tr\u1ed3ng ch\u00e8 kh\u00e1c nhau cho ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng th\u00e0nh ph\u1ea7n ba ankaloid trong ch\u00e8 l\u00e0 kh\u00e1c nhau v\u00e0 ba th\u00e0nh ph\u1ea7n n\u00e0y ch\u1ecbu \u1ea3nh h\u01b0\u1edfng r\u1ea5t nhi\u1ec1u b\u1edfi ph\u01b0\u01a1ng ph\u00e1p canh t\u00e1c v\u00e0 ph\u00e2n b\u00f3n cho ch\u00e8.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Caffeine, ch\u00e8, HPLC, Theobromine, Theophylline<\/p>\n

 <\/td>\n<\/tr>\n

Simultaneous determination of caffeine, theobromine, and theophylline in some kinds of tea produced in the North Viet Nam with using high-performance liquid chromatography (HPLC) <\/b><\/p>\n

This paper is dealt with the results of analysis with using high-performance liquid chromatography (HPLC) to identify the content of theobromine, theophylline and caffeine (TB, TP and CF) in tea produced in the 4 provinces Phu Tho, Thai Nguyen, Lao Cai and Nghe An. The separation was performed with 100 LiChrospher column RP – 18 (5\u03bcm) using 15% ACN \/85% deion water as the mobile phase at 0.8 ml\/ min and absorbance wavelength at 271nm. The method has limit of detection for TB, TP and CF respectively: 1.48ppm, 1.41ppm and 1.41ppm and detection of quantitative respectively: 4:49 ppm, 4.27ppm and 4.29ppm. Real sample analysis results showed that the different locations for tea growing, the weight percentages of the three tea ankaloid are different and these three components greatly influenced by farming methods and fertilizers.<\/p>\n

Keywords: <\/i><\/b>Caffeine, HPLC, tea, theobromine, theophylline<\/p>\n

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

\u1ea2NH H\u01af\u1edeNG C\u1ee6A T\u1ef6 L\u1ec6 V\u1ece C\u00c2Y \u0110\u1ebeN T\u00cdNH CH\u1ea4T C\u01a0 L\u00dd V\u00c1N COMPOSITE V\u1ece C\u00c2Y KEO TAI T\u01af\u1ee2NG (Acacia mangium)<\/i><\/b><\/p>\n

V\u0169 \u0110\u00ecnh Th\u1ecbnh1, V\u0169 Huy \u0110\u1ea1i2 <\/b><\/p>\n

1Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam, 2Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT <\/b><\/p>\n

V\u00e1n composite v\u1ecf c\u00e2y Keo tai t\u01b0\u1ee3ng l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a \u0111\u1ec1 t\u00e0i \u201cNghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 c\u00f4ng ngh\u1ec7 t\u1ea1o v\u00e1n composite v\u1ecf c\u00e2y g\u1ed7 Keo tai t\u01b0\u1ee3ng\u201d. \u0110\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i v\u00e1n \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb d\u0103m s\u1ee3i v\u1ecf c\u00e2y v\u00e0 d\u0103m g\u1ed7 c\u1ee7a lo\u00e0i c\u00e2y g\u1ed7 n\u00e0y. K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 l\u00fd c\u1ee7a 2 lo\u1ea1i v\u00e1n s\u1ea3n ph\u1ea9m c\u00f3 t\u1ef7 l\u1ec7 th\u00e0nh ph\u1ea7n gi\u1eefa d\u0103m s\u1ee3i v\u1ecf v\u00e0 d\u0103m g\u1ed7 v\u1edbi c\u00e1c k\u1ebft c\u1ea5u kh\u00e1c nhau: v\u00e1n 3 l\u1edbp (V3) v\u1edbi t\u1ef7 l\u1ec7 d\u0103m s\u1ee3i v\u1ecf : d\u0103m g\u1ed7 : d\u0103m s\u1ee3i v\u1ecf l\u00e0 (30 : 40 : 30)% v\u00e0 v\u00e1n 3 l\u1edbp (V4) v\u1edbi t\u1ef7 l\u1ec7 d\u0103m g\u1ed7 : d\u0103m s\u1ee3i v\u1ecf : d\u0103m g\u1ed7 l\u00e0 (20 : 60 : 20)% c\u00f3 s\u1ef1 kh\u00e1c nhau r\u00f5 r\u1ec7t, \u0111\u1ed3ng th\u1eddi c\u0169ng kh\u00e1c bi\u1ec7t v\u1edbi lo\u1ea1i v\u00e1n 1 l\u1edbp \u0111\u01b0\u1ee3c t\u1ea1o t\u1eeb 100% d\u0103m s\u1ee3i v\u1ecf (V1) v\u00e0 lo\u1ea1i 1 l\u1edbp t\u1eeb 100% d\u0103m g\u1ed7 (V2) l\u00e0 v\u00e1n \u0111\u1ed1i ch\u1ee9ng. C\u00e1c lo\u1ea1i v\u00e1n V3 v\u00e0 V4 \u0111\u1ec1u c\u00f3 m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n c\u1ee7a lo\u1ea1i v\u00e1n d\u0103m th\u00f4ng d\u1ee5ng. Lo\u1ea1i v\u00e1n V3 v\u00e0 V4 c\u00f3 \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh r\u1ea5t cao, t\u1edbi 27,11 MPa, cao g\u1ea5p 2 l\u1ea7n so v\u1edbi ti\u00eau chu\u1ea9n. C\u01b0\u1eddng \u0111\u1ed9 k\u00e9o vu\u00f4ng g\u00f3c v\u1edbi b\u1ec1 m\u1eb7t v\u00e1n c\u1ee7a c\u1ea3 4 lo\u1ea1i v\u00e1n \u0111\u1ec1u \u0111\u1ea1t gi\u00e1 tr\u1ecb t\u1eeb 0,302 MPa \u0111\u1ebfn 0,47 MPa, trong \u0111\u00f3 cao nh\u1ea5t l\u00e0 c\u1ee7a v\u00e1n V4. Nh\u01b0 v\u1eady, t\u1ef7 l\u1ec7 d\u0103m s\u1ee3i v\u1ecf c\u00e2y c\u0169ng nh\u01b0 k\u1ebft c\u1ea5u trong v\u00e1n composite v\u1ecf c\u00e2y Keo tai t\u01b0\u1ee3ng c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn \u0111\u1eb7c t\u00ednh c\u1ee7a v\u00e1n.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>V\u00e1n composite v\u1ecf c\u00e2y, d\u0103m s\u1ee3i v\u1ecf c\u00e2y g\u1ed7, Keo tai t\u01b0\u1ee3ng<\/p>\n

 <\/td>\n<\/tr>\n

Effects of bark proportion to physicochemical properties of composite board made from Acacia mangium <\/i>bark <\/b><\/p>\n

Wood particle composite board from Acacia mangium <\/i>bark was made from bark and wood chip with different ratio between outer and inner layers. In this study, the board made from different ratio of Acacia manguim <\/i>bark chips : wood chips : bark chips are 30 : 40 : 30 (V3) and 20 : 60 : 20% (V4) have significant differrents on physical and mechanical properties compare to pure fibre bark board (V1) or pure wood fibre wood (V2). V3 and V4 board have some mechanical properties equal to the standard of partical board. The static bending strength of these boards are very hight, reached 27.11 MPa, two times higher than standard requirement. The tensile strength perpendicular to surface of all boards gained from 0.302 MPa to 0.47 MPa. This result shows that Acacia manguim <\/i>bark chips has significant impact on physical and mechanical properties of particle composite board.<\/p>\n

Keywords: <\/i><\/b>Particle composite board, Acacia mangium, <\/i>particle from bark<\/p>\n

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

C\u1ea4U T\u1ea0O GI\u1ea2I PH\u1eaaU C\u1ee6A G\u1ed6 TH\u1eca Diospyros decandra <\/i>Lour.<\/b><\/p>\n

\u0110\u1ed7 V\u0103n B\u1ea3n1, Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc2, B\u00f9i H\u1eefu Th\u01b0\u1edfng1<\/b><\/p>\n

\u00a0<\/b>1Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng 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

C\u00e2y g\u1ed7 Th\u1ecb Diospyros decandra <\/i>Lour., l\u00e0 c\u00e2y g\u1ed7 l\u1edbn, m\u1ecdc t\u1ef1 nhi\u00ean v\u00e0 \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf Vi\u1ec7t Nam, Cam-pu-chia, L\u00e0o, Th\u00e1i Lan v\u00e0 Myanmar. G\u1ed7 c\u00f3 d\u00e1c v\u00e0 l\u00f5i kh\u00f4ng ph\u00e2n bi\u1ec7t, m\u00e0u tr\u1eafng v\u00e0ng nh\u1ea1t, v\u00f2ng sinh tr\u01b0\u1edfng kh\u00f3 th\u1ea5y, m\u1eb7t g\u1ed7 m\u1ecbn. L\u1ed7 m\u1ea1ch \u0111\u01a1n v\u00e0 k\u00e9p ng\u1eafn, nh\u1ecf, ph\u00e2n t\u00e1n, kh\u00f4ng c\u00f3 ch\u1ea5t ch\u1ee9a ho\u1eb7c th\u1ec3 b\u00edt, l\u1ed7 th\u00f4ng m\u1ea1ch \u0111\u01a1n, tia g\u1ed7 nh\u1ecf, \u0111\u00f4i khi c\u00f3 nh\u1eefng tia g\u1ed7 r\u1ea5t l\u1edbn. M\u00f4 m\u1ec1m d\u1ecdc \u00edt. C\u00f3 ch\u1ee9a tinh th\u1ec3 h\u00ecnh l\u0103ng tr\u1ee5 trong tia g\u1ed7. Th\u01b0\u1eddng th\u1ea5y c\u00f3 v\u1ebft nh\u1ef1a \u0111en t\u00edch t\u1ee5. G\u1ed7 c\u1ee9ng v\u00e0 n\u1eb7ng. C\u0103n c\u1ee9 theo c\u1ea5u t\u1ea1o, g\u1ed7 Th\u1ecb c\u00f3 kh\u1ea3 n\u0103ng kh\u00f4 nhanh, d\u1ec5 ng\u00e2m t\u1ea9m b\u1ea3o qu\u1ea3n nh\u01b0ng d\u1ec5 n\u1ee9t, d\u1ec5 b\u1ecb n\u1ea5m m\u1ed1c v\u00e0 c\u00f4n tr\u00f9ng h\u1ea1i g\u1ed7 th\u00e2m nh\u1eadp.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>G\u1ed7 Th\u1ecb, Diospyros decandra, <\/i>c\u1ea5u t\u1ea1o th\u00f4 \u0111\u1ea1i, c\u1ea5u t\u1ea1o hi\u1ec3n vi<\/p>\n

 <\/td>\n<\/tr>\n

Wood anatomy of Diospyros decandra <\/i>Lour <\/b><\/p>\n

Diospyros decandra <\/i>Lour. is a big wood tree species. It is naturally distributed and planted in Vietnam, Cambodia, Laos, Thailand and Myanmar. Sapwood colour indistinct from heartwood colour. Its colour is white and yellowish, Growth ring boundaries indistinct, the wood surface is fine. Wood pores are solitary, short multiples, small, disperal and without deposits, the simple pits. Mostly small size rays, but the larger rays are being occurred occasionally. Axial parenchyma is scanty. There are prismatic crystals occurred in the rays. Often observed cluster of black gum exposed. The wood is heavy and hard. Based on anatomy, Diospyros decandra <\/i>Lour. wood could be claimed as a timber of fast drying and easy chemical treatment, however it easy to be cracked and attached by fungi and insects during utilization.<\/p>\n

Keywords: <\/i><\/b>Thi timber, Diospyros decandra<\/i>, macroscopically anatomy, microscopically anatomy<\/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 S\u1ed0 4 \u2013 2016 1 Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng c\u00e2y H\u1ed3ng di\u1ec7p (Gymnocladus chinensis Baill.) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom V\u0169 Th\u1ecb B\u00edch H\u1eadu V\u00f5 Qu\u1ed1c B\u1ea3o Ph\u1ea1m Th\u1ecb Kim Thoa A study of Gymnocladus chinensis Baill. multiplication using cutting propagation method 4579 2 Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng sinh […]<\/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\/1538"}],"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=1538"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1538\/revisions"}],"predecessor-version":[{"id":1689,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1538\/revisions\/1689"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}