{"id":2326,"date":"2022-12-06T13:41:07","date_gmt":"2022-12-06T06:41:07","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2326"},"modified":"2023-11-24T15:02:47","modified_gmt":"2023-11-24T08:02:47","slug":"vietnam-journal-of-forest-science-number-6-2022","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2022\/12\/vietnam-journal-of-forest-science-number-6-2022\/","title":{"rendered":"Vietnam Journal of Forest Science Number 5-2022"},"content":{"rendered":"

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<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 <\/strong>5<\/strong> – <\/strong>20<\/strong>2<\/strong>2<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng Sa nh\u00e2n t\u00edm (Amomum longiligulare<\/em> T.L.Wu) t\u1eeb h\u1ea1t t\u1ea1i t\u1ec9nh\u00a0S\u01a1n La<\/td>\nResults of production by seed and growth Amomum longiligulare<\/em> T.L.Wu\u00a0in the narratory stage\u00a0in Son La<\/td>\nNguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc
\nTr\u1ea7n Anh Tu\u1ea5n
\nNguy\u1ec5n V\u0169 Giang
\n<\/em>\u0110a Ly Phon S\u00edt Th\u1ecb P\u0103n Nha<\/em><\/td>\n		5<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng lo\u00e0i \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn (Rhododendron moulmainense<\/em> Hook. f.) b\u1eb1ng hom<\/td>\nCutting propagation of Rhododendron moulmainense<\/em> Hook. f.<\/td>\nL\u01b0u Th\u1ebf Trung
\nPh\u00ed H\u1ed3ng H\u1ea3i
\nLa \u00c1nh D\u01b0\u01a1ng
\nTr\u1ea7n V\u0103n Ti\u1ebfn<\/em><\/td>\n		15<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y M\u1eadt nh\u00e2n (Euricoma longgifolia<\/em> Jack) t\u1eeb h\u1ea1t<\/td>\nResearch on techniques
\nfor breeding Euricoma longifolia<\/em> Jack from seeds<\/td>\n		Tr\u1ea7n Th\u1ecb Th\u00fay H\u1eb1ng
\nPh\u1ea1m Ti\u1ebfn B\u1eb1ng
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nTr\u1ea7n H\u1ed3ng S\u01a1n
\nMai Vi\u1ec7t Tr\u01b0\u1eddng S\u01a1n
\nD\u01b0\u01a1ng Xu\u00e2n Th\u1eafng<\/em><\/td>\n		25<\/td>\n<\/tr>\n
4.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m v\u1eadt h\u1eadu, sinh l\u00fd v\u00e0 b\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng Qu\u1ebf tr\u00e0 my t\u1ea1i t\u1ec9nh Qu\u1ea3ng Nam<\/td>\nStudy of phenological, physiological characteristics and seed storage of Cinnamomum cassia<\/em> in Quang Nam province<\/td>\nB\u00f9i Ki\u1ec1u H\u01b0ng
\nV\u00f5 Th\u1ecb Th\u1ea3o
\nL\u00ea V\u0103n Quang
\nPhan Th\u1ecb Luy\u1ebfn
\nT\u1ea1 Nh\u1eadt V\u01b0\u01a1ng
\nDi\u1ec7p Xu\u00e2n Tu\u1ea5n
\nPh\u1ea1m \u0110\u00f4n<\/em><\/td>\n		35<\/td>\n<\/tr>\n
5.<\/td>\nSinh tr\u01b0\u1edfng c\u00e1c d\u00f2ng keo lai t\u1ef1 nhi\u00ean (Acacia mangium<\/em> \u00d7 A. auriculiformis<\/em>) m\u1edbi ch\u1ecdn l\u1ecdc t\u1ea1i \u0110\u1ecbnh Qu\u00e1n, \u0110\u1ed3ng Nai<\/td>\nGrowth of newly selected natural acacia hybrid (Acacia mangium<\/em> \u00d7\u00a0A. auriculiformis<\/em>) clones
\nin Dinh Quan, Dong Nai<\/td>\n		\u0110\u1ed7 Thanh T\u00f9ng
\nNguy\u1ec5n \u0110\u1ee9c Ki\u00ean
\nD\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n
\nNg\u00f4 V\u0103n Ch\u00ednh<\/em><\/td>\n		44<\/td>\n<\/tr>\n
6.<\/td>\nSinh tr\u01b0\u1edfng c\u1ee7a Keo l\u00e1 tr\u00e0m trong c\u00e1c m\u00f4 h\u00ecnh kh\u1ea3o nghi\u1ec7m gi\u1ed1ng v\u00e0 \u1ee9ng d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i t\u1ec9nh Qu\u1ea3ng Tr\u1ecb<\/td>\nGrowth of Acacia auriculiformis<\/em> in trial models and application\u00a0of advanced technology\u00a0in clones, silviculture for sawlog production in Quang Tri province<\/td>\nV\u0169 \u0110\u1ee9c B\u00ecnh
\nNguy\u1ec5n Th\u1ecb Thanh Nga
\nPh\u1ea1m Xu\u00e2n \u0110\u1ec9nh
\nL\u00ea Th\u1ecb Nh\u01b0 Nguy\u1ec7t
\nTr\u1ea7n Th\u1ecb T\u01b0\u1eddng V\u00e2n
\nL\u00ea Xu\u00e2n To\u00e0n
\nL\u00ea Th\u1ecb Tuy\u1ebft
\nNguy\u1ec5n Th\u1ecb Th\u1ea3o Trang
\nNguy\u1ec5n T\u00f9ng L\u00e2m
\nHo\u00e0ng V\u0103n Tu\u1ea5n<\/em><\/td>\n		53<\/td>\n<\/tr>\n
7.<\/td>\nTh\u1ef1c tr\u1ea1ng qu\u1ea3n l\u00fd v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p t\u1ed5ng h\u1ee3p ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng r\u1eebng ph\u00f2ng h\u1ed9 v\u00e0 r\u1eebng \u0111\u1eb7c d\u1ee5ng tr\u00ean \u0111\u1ecba b\u00e0n Th\u00e0nh ph\u1ed1 H\u00e0 N\u1ed9i<\/td>\nCurrent management status and integrated measures for sustainable development of protection and special use forest in Hanoi city<\/td>\nPh\u1ea1m \u0110\u00f4n
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nB\u00f9i Ki\u1ec1u H\u01b0ng
\nPhan Th\u1ecb Luy\u1ebfn
\nT\u1ea1 Nh\u1eadt V\u01b0\u01a1ng<\/em><\/td>\n		61<\/td>\n<\/tr>\n
8.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m h\u1ec7 sinh th\u00e1i r\u1eebng n\u00fai \u0111\u00e1 t\u1ea1i Khu r\u1eebng \u0111\u1eb7c d\u1ee5ng b\u1ea3o v\u1ec7 c\u1ea3nh quan V\u1ecbnh H\u1ea1 Long, t\u1ec9nh
\nQu\u1ea3ng Ninh<\/td>\n		Characteristics of the mountine forest in the special forest protecting the landscape of Ha Long Bay, Quang Ninh province<\/td>\nCao V\u0103n L\u1ea1ng
\nV\u0169 Duy V\u0103n
\nTr\u1ecbnh Ng\u1ecdc Bon
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nHo\u00e0ng Th\u1ecb Nhung
\nNguy\u1ec5n V\u0103n Tu\u1ea5n
\nPh\u1ea1m V\u0103n Vi\u1ec7n
\nTr\u1ea7n Xu\u00e2n An
\nHo\u00e0ng V\u0103n Th\u1eafng<\/em><\/td>\n		77<\/td>\n<\/tr>\n
9.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a qu\u1ea3n l\u00fd v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c \u0111\u1ebfn t\u00ednh ch\u1ea5t \u0111\u1ea5t v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m 3 tu\u1ed5i \u1edf chu k\u1ef3 4 t\u1ea1i Ph\u00fa B\u00ecnh, B\u00ecnh D\u01b0\u01a1ng<\/td>\nEffects of slash managenment on soil property and productivity of the Acacia auriculiformis<\/em> plantation
\n3 year old, rotation 4,
\nPhu Binh, Binh Duong<\/td>\n		Ki\u1ec1u M\u1ea1nh H\u00e0
\nV\u0169 \u0110\u00ecnh H\u01b0\u1edfng
\nNguy\u1ec5n Xu\u00e2n H\u1ea3i
\nL\u00ea Thanh Quang
\nNguy\u1ec5n V\u0103n \u0110\u0103ng
\nNinh V\u0103n Tu\u1ea5n <\/em><\/td>\n		85<\/td>\n<\/tr>\n
10.<\/td>\nNghi\u00ean c\u1ee9u \u0111a d\u1ea1ng h\u1ec7 th\u1ef1c v\u1eadt r\u1eebng t\u1ea1i Khu r\u1eebng \u0111\u1eb7c d\u1ee5ng Xu\u00e2n Nha, t\u1ec9nh S\u01a1n La v\u00e0 \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o t\u1ed3n \u0111a d\u1ea1ng sinh h\u1ecdc<\/td>\nResearch on the diversity of plants in special used forest Xuan Nha, Son La province and recomemdations for biodiversity conservation<\/td>\n\u0110inh C\u00f4ng Tr\u00ecnh
\nNguy\u1ec5n Duy Kh\u00e1nh
\nNguy\u1ec5n V\u0103n H\u00f9ng
\nHo\u00e0ng Thanh S\u01a1n
\nH\u00e0 V\u0103n Ti\u1ec7p<\/em><\/td>\n		96<\/td>\n<\/tr>\n
11.<\/td>\nTh\u1eed nghi\u1ec7m x\u00e2y d\u1ef1ng ch\u01b0\u01a1ng tr\u00ecnh hi\u1ec7u ch\u1ec9nh\u00a0\u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ecba h\u00ecnh\u00a0tr\u00ean \u1ea3nh v\u1ec7 tinh – tr\u01b0\u1eddng h\u1ee3p th\u1ef1c hi\u1ec7n cho \u1ea3nh Landsat-8 tr\u00ean n\u1ec1n t\u1ea3ng Google Earth Engine<\/td>\nTest to build a program to adjust the effect of terrain on satellite images – case for Landsat-8 imagery on the Google Earth Engine platform<\/td>\nPh\u1ea1m V\u0103n Du\u1ea9n
\nV\u0169 Th\u1ecb Th\u00ecn
\nPh\u1ea1m Ti\u1ebfn D\u0169ng<\/em><\/td>\n		105<\/td>\n<\/tr>\n
12.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng c\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ng\u1eadp m\u1eb7n tr\u00ean c\u00e1c nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba ven bi\u1ec3n t\u1ea1i Nghi Xu\u00e2n, H\u00e0 T\u0129nh<\/td>\nGrowth characteristics of forest plant species on groups of sites in coastal areas in Nghi Xuan,
\nHa Tinh<\/td>\n		Ph\u1ea1m V\u0103n Ng\u00e2n
\nNg\u00f4 \u0110\u00ecnh Qu\u1ebf
\nV\u0169 T\u1ea5n Ph\u01b0\u01a1ng
\nL\u00ea \u0110\u1ee9c Th\u1eafng<\/em><\/td>\n		118<\/td>\n<\/tr>\n
13.<\/td>\nN\u0103ng su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 kinh t\u1ebf r\u1eebng tr\u1ed3ng keo lai v\u00e0 b\u1ea1ch \u0111\u00e0n lai tr\u00ean b\u1edd bao\u00a0t\u1ea1i khu v\u1ef1c H\u00f2n \u0110\u1ea5t,\u00a0t\u1ec9nh Ki\u00ean Giang<\/td>\nProductivity and economic efficiency of acacia hybrid and eucalyptus hybrid planting on the high embankment of acid sulphate soil at Hon Dat district, Kien Giang province<\/td>\nNg\u00f4 V\u0103n Ng\u1ecdc
\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t
\nTr\u1ea7n Kh\u00e1nh Hi\u1ec7u
\nNguy\u1ec5n Tr\u1ecdng Nam
\nTr\u1ea7n V\u0103n Nho
\nL\u00ea Tri\u1ec7u Duy<\/em><\/td>\n		126<\/td>\n<\/tr>\n
14.<\/td>\nM\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch \u1ea9m v\u00e0 s\u1ef1 ph\u00e1t tri\u1ec3n khuy\u1ebft t\u1eadt trong qu\u00e1 tr\u00ecnh s\u1ea5y g\u1ed7\u00a0Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/em> Willd.)<\/td>\nMoisture content gradient and defect development of Acacia mangium<\/em> Willd. during drying process<\/td>\nH\u00e0 Ti\u1ebfn M\u1ea1nh
\nPh\u1ea1m V\u0103n Ch\u01b0\u01a1ng
\nB\u00f9i Duy Ng\u1ecdc
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nTr\u1ea7n \u0110\u1ee9c Trung<\/em><\/td>\n		135<\/td>\n<\/tr>\n
15.<\/td>\nK\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng g\u00f4\u0303 kha\u0309o c\u00f4\u0309 khai qu\u1eadt t\u1ea1i Kinh \u0111\u00f4 Hoa L\u01b0, Ninh B\u00ecnh<\/td>\nEvaluation of deterioration status of historical wood excavated at Hoa Lu ancient capital, Ninh Binh<\/td>\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nNguy\u1ec5n T\u1eed Kim
\nHo\u00e0ng Trung Hi\u1ebfu
\nNguy\u1ec5n Ng\u1ecdc Qu\u00fd<\/em><\/td>\n		150<\/td>\n<\/tr>\n
16.<\/td>\nQu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7, \u1ee9ng d\u1ee5ng tre \u00e9p kh\u1ed1i trong \u0111\u1eddi s\u1ed1ng<\/td>\nFormation and development of bamboo scrimber in life<\/td>\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\n\u0110\u1ed7 Th\u1ecb Ho\u00e0i Thanh<\/em><\/td>\n		158<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

\u00a0<\/strong><\/a>K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG\u00a0SA NH\u00c2N T\u00cdM (Amomum longiligulare<\/em> T.L.Wu) T\u1eea H\u1ea0T
\nT\u1ea0I T\u1ec8NH S\u01a0N LA<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc1<\/sup>, Tr\u1ea7n Anh Tu\u1ea5n1<\/sup>, Nguy\u1ec5n V\u0169 Giang2,
\n\u0110a Ly Phon S\u00edt Th\u1ecb P\u0103n Nha3<\/sup><\/p>\n

1Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y B\u1eafc
\n2 Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n3 Ph\u00f2ng Ki\u1ec3m l\u00e2m t\u1ec9nh Lu\u00f4ng N\u1eb7m Th\u00e0, L\u00e0o<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Sa nh\u00e2n t\u00edm (Amomum longiligulare<\/em> T. L.Wu) l\u00e0 d\u01b0\u1ee3c li\u1ec7u qu\u00fd \u0111ang \u0111\u01b0\u1ee3c \u01b0u ti\u00ean t\u1eadp trung ph\u00e1t tri\u1ec3n tr\u1ed3ng \u1edf quy m\u00f4 l\u1edbn theo Quy\u1ebft \u0111\u1ecbnh s\u1ed1 1976\/Q\u0110-TTg ng\u00e0y 30\/10\/2013, danh m\u1ee5c ch\u1ec9 \u0111\u1ecbnh v\u00f9ng sinh th\u00e1i tr\u1ed3ng t\u1ea1i S\u01a1n La. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong khu\u00f4n kh\u1ed5 \u0111\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u khoa h\u1ecdc v\u00e0 ph\u00e1t tri\u1ec3n c\u00f4ng ngh\u1ec7 c\u1ea5p B\u1ed9, B\u1ed9 Gi\u00e1o d\u1ee5c v\u00e0 \u0110\u00e0o t\u1ea1o m\u00e3 s\u1ed1 B2019 – TTB – 03 t\u1ea1i khu v\u1ef1c S\u01a1n La. M\u1ee5c \u0111\u00edch x\u00e1c \u0111\u1ecbnh x\u1eed l\u00fd h\u1ea1t, m\u1ee9c \u0111\u1ed9 che s\u00e1ng v\u00e0 th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u t\u1ed1t nh\u1ea5t cho c\u00e2y con Sa nh\u00e2n t\u00edm giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m (\u0111\u1ebfn 9 th\u00e1ng tu\u1ed5i). Ph\u01b0\u01a1ng ph\u00e1p b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m theo kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7 l\u1eb7p l\u1ea1i 3 l\u1ea7n v\u00e0 x\u1eed l\u00fd th\u1ed1ng k\u00ea to\u00e1n h\u1ecdc \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. K\u1ebft qu\u1ea3 cho th\u1ea5y, nhi\u1ec7t \u0111\u1ed9 x\u1eed l\u00fd h\u1ea1t Sa nh\u00e2n t\u00edm t\u1ed1t nh\u1ea5t l\u00e0 50o<\/sup>C trong th\u1eddi gian 12 gi\u1edd cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m cao nh\u1ea5t 89,0% v\u00e0 th\u1eddi gian 19,1 ng\u00e0y l\u00e0 h\u1ea1t n\u1ee9t nanh to\u00e0n b\u1ed9. T\u1ef7 l\u1ec7 che s\u00e1ng 50% c\u00f3 \u1ea3nh h\u01b0\u1edfng t\u1ed1t nh\u1ea5t, t\u1ef7 l\u1ec7 s\u1ed1ng 82,2%, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c trung b\u00ecnh 5,9 mm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh 33,3 cm, sinh tr\u01b0\u1edfng gi\u1eefa c\u00e1c c\u00e2y kh\u00e1 \u0111\u1ed3ng \u0111\u1ec1u, h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh 13,0%, h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 chi\u1ec1u cao l\u00e0 24,14%. Th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u ch\u01b0a th\u1ef1c s\u1ef1 c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng nh\u01b0ng c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao c\u1ee7a c\u00e2y con Sa nh\u00e2n t\u00edm. Th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u t\u1ed1t nh\u1ea5t 68% \u0111\u1ea5t m\u1eb7t + 20% c\u00e1t m\u1ecbn + 10% ph\u00e2n chu\u1ed3ng hoai + 2% super l\u00e2n cho t\u1ef7 l\u1ec7 s\u1ed1ng 88,9%, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c trung b\u00ecnh 5,9 mm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh 35,3 cm, c\u00e2y sinh tr\u01b0\u1edfng \u0111\u1ed3ng \u0111\u1ec1u c\u1ea3 v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 chi\u1ec1u cao. K\u1ebft qu\u1ea3 c\u0169ng cho th\u1ea5y, kh\u00f4ng n\u00ean gieo \u01b0\u01a1m c\u00e2y Sa nh\u00e2n t\u00edm trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng che s\u00e1ng v\u00e0 kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng ru\u1ed9t b\u1ea7u \u0111\u1ebfn 88% l\u1edbp \u0111\u1ea5t m\u1eb7t d\u00f9 c\u00f3 b\u1ed5 sung 10% ph\u00e2n chu\u1ed3ng, 2% ph\u00e2n l\u00e2n c\u00e2y v\u1eabn hay b\u1ecb b\u00edt r\u1ec5, v\u00e0ng l\u00e1, sinh tr\u01b0\u1edfng k\u00e9m v\u00e0 t\u1ef7 l\u1ec7 s\u1ed1ng r\u1ea5t th\u1ea5p.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> Sa nh\u00e2n t\u00edm, nh\u00e2n gi\u1ed1ng b\u1eb1ng h\u1ea1t, che s\u00e1ng, th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u, t\u1ec9nh S\u01a1n La<\/td>\n<\/tr>\n

\n

<\/a>Results of production by seed and growth Amomum longiligulare<\/em> T.L.Wu in the narratory stage in Son La<\/strong><\/p>\n

Amomum longiligulare<\/em> T. L.Wu is a precious medicinal herb that is being prioritized to focus on developing large-scale cultivation according to the Decision No. 1976 of the Prime Minister of Vietnam dated October 30, 2013, the list of designated ecological zones for planting in Son La. This study was carried out within the framework of the scientific research and technological development project at the ministerial level, the Ministry of Education and Training, code B2019 – TTB – 03 in Son La area. The purpose of the study was to determine the best incubation temperature, shade and potting composition for Amomum longiligulare<\/em> T. L.Wu seedlings at the nursery stage (up to 9 months of age). Full randomized block design with 3 repetitions and mathematical statistical processing was applied. The results showed that the best incubation temperature for Amomum longiligulare<\/em> T. L.Wu seeds was 50 degrees for 12 hours, giving the highest germination rate of 89.0% and the shortest incubation time of 19.1 days. The results showed that the rate of shading 50% had the best effect, with the survival rate of 82.2%, the average root diameter of 5.9 mm, the average height of the tops 33.3 cm, growing between trees. quite uniform, coefficient of variation in diameter is 13.0%, coefficient of variation in height is 24.14%. The composition of the potting medium did not really have a significant effect on the survival rate, but it did have a significant effect on the growth in diameter and height of Amomum longiligulare<\/em> T.L.Wu seedlings. Best potting soil composition 70% topsoil + 20% fine sand + 10% manure (addition of 2 g phosphorus\/pot) for survival rate of 88.9%, average root diameter of 5.9 mm, soaring height tops average 35.3 cm, trees grow evenly in both stem diameter and height. The results also show that Amomum longiligulare<\/em> T.L.Wu plants should not be nursed in unshaded conditions and should not use potting soil up to 90% of the soil layer. Even with the addition of 10% manure, the roots are often blocked. yellow leaves, poor growth and very low survival rate.<\/p>\n

Keywords:<\/em> Amomum longiligulare<\/em> T.L.Wu, propagated by seeds, shade, composition of gourd, Son La province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG\u00a0LO\u00c0I \u0110\u1ed6 QUY\u00caN L\u00c1 NH\u1eccN (Rhododendron moulmainense <\/em>Hook. f.) B\u1eb0NG HOM<\/p>\n

<\/a>L\u01b0u Th\u1ebf Trung1<\/sup>, Ph\u00ed H\u1ed3ng H\u1ea3i2<\/sup>, <\/sub>La \u00c1nh D\u01b0\u01a1ng3<\/sup>, Tr\u1ea7n V\u0103n Ti\u1ebfn4<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam Trung B\u1ed9 & T\u00e2y Nguy\u00ean
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7n Nam
\n3<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n4<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i H\u1ecdc \u0110\u00e0 L\u1ea1t<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o n\u00e0y gi\u1edbi thi\u1ec7u m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nh\u00e2n gi\u1ed1ng \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn ph\u1ee5c v\u1ee5 c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n ngu\u1ed3n gen t\u1ea1i L\u00e2m \u0110\u1ed3ng. C\u00e0nh hom ph\u1ee5c v\u1ee5 nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb c\u00e2y m\u1eb9 trong r\u1eebng t\u1ef1 nhi\u00ean, t\u1eeb c\u00e1c c\u00e0nh b\u00e1nh t\u1ebb n\u1eeda h\u00f3a g\u1ed7 \u1edf \u0111\u1ec9nh t\u00e1n c\u00e2y, kh\u1ecfe m\u1ea1nh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng d\u1ea1ng n\u01b0\u1edbc c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn h\u01a1n so v\u1edbi d\u1ea1ng b\u1ed9t trong nh\u00e2n gi\u1ed1ng \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn. Lo\u1ea1i v\u00e0 n\u1ed3ng \u0111\u1ed9 ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng c\u0169ng c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t t\u1edbi kh\u1ea3 n\u0103ng nh\u00e2n gi\u1ed1ng b\u1eb1ng hom. Hom gi\u00e2m x\u1eed l\u00fd b\u1eb1ng IBA n\u1ed3ng \u0111\u1ed9 2.500 ppm sau 180 ng\u00e0y \u0111\u1ea1t t\u1ef7 l\u1ec7 ra r\u1ec5 cao nh\u1ea5t 51,1%, chi\u1ec1u d\u00e0i r\u1ec5 trung b\u00ecnh \u0111\u1ea1t 0,6 cm v\u00e0 s\u1ed1 l\u01b0\u1ee3ng r\u1ec5 \u0111\u1ea1t 12,6 r\u1ec5\/hom. M\u00f9a gi\u00e2m hom th\u00edch h\u1ee3p nh\u1ea5t cho \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn l\u00e0 m\u00f9a h\u00e8, th\u00e1ng 4. Ch\u1ebf \u0111\u1ed9 che s\u00e1ng c\u00f3 \u1ea3nh h\u01b0\u1edfng t\u1ed1t nh\u1ea5t \u0111\u1ebfn sinh tr\u01b0\u1edfng chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c l\u00e0 50%. Th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c l\u00e0 50% x\u01a1 d\u1eeba + 50% \u0111\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> \u0110\u1ed7 quy\u00ean l\u00e1 nh\u1ecdn, nh\u00e2n gi\u1ed1ng, che s\u00e1ng, ru\u1ed9t b\u1ea7u<\/td>\n<\/tr>\n

\n

<\/a>Cutting propagation of Rhododendron moulmainense <\/em>Hook. f.<\/strong><\/p>\n

This paper introduces some results of cutting propagation of Rhododendron moulmainense <\/em>Hook. f. for gene conservation and deployment in Lam Dong. The cuttings for this study were taken from the mother trees in natural forest, from the semi-wooded branches at the top of the canopy and healthy. The research results showed that the liquid hormone has a greater effect than the powder hormone in cutting propagation of R. moulmainense<\/em>. The type and concentration of hormones also have a significant effect on the ability to propagate by cuttings. Cuttings treated with IBA concentration of 2.500 ppm after 180 days achieved the highest rooting rate of 51.1%, the average root length was 0.6 cm and the number of roots per cutting reached 12.6 roots. The most suitable cutting season for Rhododendrons is summer, April. Shading has the best effect on growth in height and diameter at ground is 50%. The composition of potting mix that affects the height growth and diameter at ground is 50% coconut fiber<\/a> + 50% soil.<\/p>\n

Keywords:<\/em> Rhododendron moulmainense, <\/em>propagation, shading, potting mix<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG C\u00c2Y M\u1eacT NH\u00c2N (Euricoma longgifolia<\/em> Jack) T\u1eea H\u1ea0T<\/p>\n

<\/a>Tr\u1ea7n Th\u1ecb Th\u00fay H\u1eb1ng1<\/sup>, Ph\u1ea1m Ti\u1ebfn B\u1eb1ng1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup>,
\nTr\u1ea7n H\u1ed3ng S\u01a1n1<\/sup>, Mai Vi\u1ec7t Tr\u01b0\u1eddng S\u01a1n1<\/sup>, D\u01b0\u01a1ng Xu\u00e2n Th\u1eafng1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m L\u00e2m nghi\u1ec7p Nhi\u1ec7t \u0111\u1edbi
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1eadt nh\u00e2n l\u00e0 lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd, c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao, ph\u00e2n b\u1ed1 r\u1ed9ng \u1edf Vi\u1ec7t Nam. Lo\u00e0i c\u00e2y n\u00e0y \u0111ang b\u1ecb khai th\u00e1c m\u1ea1nh trong t\u1ef1 nhi\u00ean d\u1eabn \u0111\u1ebfn di\u1ec7n t\u00edch v\u00e0 tr\u1eef l\u01b0\u1ee3ng b\u1ecb suy gi\u1ea3m m\u1ea1nh. B\u00e0i b\u00e1o n\u00e0y tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y M\u1eadt nh\u00e2n t\u1eeb h\u1ea1t, \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i v\u01b0\u1eddn \u01b0\u01a1m Trung t\u00e2m L\u00e2m nghi\u1ec7p Nhi\u1ec7t \u0111\u1edbi. K\u1ebft qu\u1ea3 cho th\u1ea5y, th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u, k\u00edch th\u01b0\u1edbc t\u00fai b\u1ea7u, t\u1ef7 l\u1ec7 che s\u00e1ng v\u00e0 ph\u00e2n b\u00f3n c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c, chi\u1ec1u cao c\u00e2y con M\u1eadt nh\u00e2n \u1edf giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m, trong \u0111\u00f3 th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u 100% \u0111\u1ea5t t\u1ea7ng m\u1eb7t, t\u1ef7 l\u1ec7 che s\u00e1ng 50%, k\u00edch th\u01b0\u1edbc ru\u1ed9t b\u1ea7u 15 \u00b4 18 cm v\u00e0 b\u00f3n ph\u00e2n chu\u1ed3ng ng\u00e2m cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t \u1edf giai \u0111o\u1ea1n 12 th\u00e1ng tu\u1ed5i.<\/p>\n

T<\/em>\u1eeb kh\u00f3a:<\/em> M\u1eadt nh\u00e2n, nh\u00e2n gi\u1ed1ng t\u1eeb h\u1ea1t, th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u, che s\u00e1ng, ph\u00e2n b\u00f3n, k\u00edch th\u01b0\u1edbc t\u00fai b\u1ea7u<\/td>\n<\/tr>\n

\n

<\/a>Research on techniques for breeding Euricoma longifolia<\/em> Jack from seeds<\/strong><\/p>\n

Euricoma longifolia<\/em> jack is a valuable medicinal plant with a great economic value, widely distributed in Vietnam. In the wild, this species is heavily exploited, which has caused the area and reserves to drastically shrink. This paper presents the results of a research on breeding techniques of Euricoma longifolia<\/em> from seeds, carried out at the Tropical Forest Research Centre (TFRC). The findings demonstrated that there was a substantial relationship between the survival rate, growth of the root diameter, and height of the seedlings at the early stage, and the composition of the potting media, the size of the potting bag, the shade regime, and the fertilization regime. The best results were obtained in a nursery where the potting soil composition was 100% topsoil, 50% shade, 15 \u00b4 18 cm potting size, and soaking manure fertilization regime.<\/p>\n

Keywords:<\/em> Euricoma longifolia, <\/em>breeding from seed, composition of potting soil, light regime, fertilizer, size of potting bag<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M V\u1eacT H\u1eacU, SINH L\u00dd V\u00c0 B\u1ea2O QU\u1ea2N\u00a0H\u1ea0T GI\u1ed0NG QU\u1ebe TR\u00c0 MY T\u1ea0I T\u1ec8NH QU\u1ea2NG NAM<\/p>\n

<\/a>B\u00f9i Ki\u1ec1u H\u01b0ng1<\/sup>, V\u00f5 Th\u1ecb Th\u1ea3o2<\/sup>, L\u00ea V\u0103n Quang1<\/sup>, Phan Th\u1ecb Luy\u1ebfn1<\/sup>,
\nT\u1ea1 Nh\u1eadt V\u01b0\u01a1ng1<\/sup>, Di\u1ec7p Xu\u00e2n Tu\u1ea5n1<\/sup>, Ph\u1ea1m \u0110\u00f4n1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u v\u00e0 Chuy\u1ec3n giao k\u1ef9 thu\u1eadt L\u00e2m sinh
\n2<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u00f4ng B\u1eafc B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a Qu\u1ebf tr\u00e0 my \u0111\u1ea7y \u0111\u1ee7 c\u00e1c pha trong m\u1ed9t n\u0103m. Hi\u1ec7n t\u01b0\u1ee3ng r\u1ee5ng nhi\u1ec1u l\u00e1 gi\u00e0 di\u1ec5n ra v\u00e0o th\u00e1ng 1 – 2 sau m\u00f9a thu ho\u1ea1ch qu\u1ea3, c\u00e2y b\u1eaft \u0111\u1ea7u ra ch\u1ed3i m\u1edbi v\u00e0o th\u00e1ng 3 – 4 v\u00e0 ra l\u00e1 non v\u00e0o th\u00e1ng 4 – 5, giai \u0111o\u1ea1n t\u1eeb th\u00e1ng 4 – 6 c\u00e2y ra hoa v\u00e0 h\u00ecnh th\u00e0nh qu\u1ea3 non. C\u00e1c th\u00e1ng ti\u1ebfp theo t\u1eeb th\u00e1ng 7 – 10 l\u00e0 qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 nu\u00f4i d\u01b0\u1ee1ng qu\u1ea3, \u0111\u1ebfn th\u00e1ng 11 – 12 l\u00e0 giai \u0111o\u1ea1n qu\u1ea3 ch\u00edn, qu\u1ea3 gi\u00e0 v\u00e0 c\u0169ng l\u00e0 th\u1eddi gian c\u00f3 th\u1ec3 thu h\u00e1i h\u1ea1t qu\u1ebf. H\u00e0ng n\u0103m c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt h\u1eadu h\u1ecdc c\u1ee7a c\u00e2y Qu\u1ebf tr\u00e0 my c\u00f3 th\u1ec3 di\u1ec5n ra s\u1edbm ho\u1eb7c mu\u1ed9n h\u01a1n t\u1eeb 10 – 15 ng\u00e0y t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m th\u1eddi ti\u1ebft t\u1eebng n\u0103m. Qua\u0309 Qu\u1ebf tr\u00e0 my co\u0301 \u0111\u01b0\u01a1\u0300ng ki\u0301nh trung bi\u0300nh 8,7 mm, chi\u00ea\u0300u d\u00e0i 10,6 mm. Ha\u0323t Qu\u1ebf tr\u00e0 my c\u00f3 \u0111\u01b0\u01a1\u0300ng ki\u0301nh trung bi\u0300nh 6,5 mm va\u0300 chi\u00ea\u0300u d\u00e0i 8,8 mm. Kh\u1ed1i l\u01b0\u1ee3ng 1.000 qu\u1ea3 l\u00e0 710 g, 1 kg qu\u1ea3 c\u00f3 trung b\u00ecnh 1.408 qu\u1ea3. \u0110\u1ed9 thu\u1ea7n h\u1ea1t gi\u1ed1ng Qu\u1ebf tr\u00e0 my l\u00e0 94,6%, kh\u1ed1i l\u01b0\u1ee3ng 1.000 h\u1ea1t l\u00e0 364 g; 1 kg ha\u0323t c\u00f3 trung bi\u0300nh 2.748 ha\u0323t. \u0110\u00f4\u0323 \u00e2\u0309m cu\u0309a ha\u0323t Qu\u1ebf tr\u00e0 my trung b\u00ecnh \u0111\u1ea1t 40,51%. T\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Qu\u1ebf tr\u00e0 my trung b\u00ecnh l\u00e0 85,3%, th\u1ebf n\u1ea3y m\u1ea7m 45,3%. B\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng Qu\u1ebf tr\u00e0 my \u1edf 0o<\/sup>C v\u1edbi th\u1eddi gian b\u1ea3o qu\u1ea3n t\u1ed1i \u0111a 6 th\u00e1ng, sau 3 th\u00e1ng b\u1ea3o qu\u1ea3n t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u00f2n 68,6%, sau 6 th\u00e1ng c\u00f2n 29,3%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> \u0110\u1eb7c \u0111i\u1ec3m v\u1eadt h\u1eadu, sinh l\u00fd h\u1ea1t gi\u1ed1ng, b\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng, Qu\u1ebf tr\u00e0 my, t\u1ec9nh Qu\u1ea3ng Nam<\/td>\n<\/tr>\n

\n

<\/a>Study of phenological, physiological characteristics and seed storage of Cinnamomum cassia <\/em>in Quang Nam province<\/strong><\/p>\n

Growth and development of Cinnamomum<\/em> cassia<\/em> have full phases in a year. The phenomenon of shedding many old leaves takes place in January – February after the fruit harvesting season, the plant begins to produce new shoots in March-April and young leaves in April-May, the period from April-June the plant flowers and forms young fruits. The next months from July-October are the process of fruit development and nourishment, November-December is the period of ripe fruits, old fruits and also the time when cinnamon seeds can be collected. Every year, the post-learning phenomena of Cinnamomum casssia<\/em> can take place as early or 10 – 15 days later depending on the weather characteristics of each year. Cinnamomum casssia<\/em> fruit has an average diameter of 8.7 mm, length of 10.6 mm. Cinnamomum cassia<\/em> seeds have an average diameter of 6.5 mm and a length of 8.8 mm. The weight of 1,000 fruits is 710 g, 1 kg of fruits has an average of 1,408 fruits. Cinnamomum cassia<\/em> seed purity is 94.6%, the weight of 1,000 seeds is 364 g; 1 kg of seeds has an average of 2,748 seeds. The moisture content of Cinnamomum cassia <\/em>seeds averages 40.51%. The germination rate of Cinnamomum cassia<\/em> seeds is on average 85.3%, the germination potential is 45.3%. Store Cinnamomum cassia<\/em> seeds at 0o<\/sup>C with a maximum storage period of 6 months, after 3 months of preservation the germination rate is 68.6%, after 6 months it is 29.3%.<\/p>\n

Keywords:<\/em> Phenological characteristics, physiological characteristics of seeds, seed storage, Cinnamomum cassia<\/em>, Quang Nam province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>SINH TR\u01af\u1edeNG C\u00c1C D\u00d2NG\u00a0KEO LAI T\u1ef0 NHI\u00caN (Acacia mangium <\/em>\u00d7 A. auriculiformis<\/em>)
\nM\u1edaI CH\u1eccN L\u1eccC T\u1ea0I \u0110\u1ecaNH QU\u00c1N, \u0110\u1ed2NG NAI<\/p>\n

<\/a>\u0110\u1ed7 Thanh T\u00f9ng, Nguy\u1ec5n \u0110\u1ee9c Ki\u00ean, D\u01b0\u01a1ng H\u1ed3ng Qu\u00e2n, Ng\u00f4 V\u0103n Ch\u00ednh<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 Sinh h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m ch\u1ecdn l\u1ecdc c\u00e1c d\u00f2ng keo lai m\u1edbi ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng \u1edf c\u00e1c t\u1ec9nh v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh tr\u00ean kh\u1ea3o nghi\u1ec7m d\u00f2ng v\u00f4 t\u00ednh keo lai t\u1ea1i Thanh S\u01a1n, \u0110\u1ecbnh Qu\u00e1n, \u0110\u1ed3ng Nai g\u1ed3m 38 d\u00f2ng keo lai m\u1edbi ch\u1ecdn l\u1ecdc v\u00e0 2 gi\u1ed1ng \u0111\u1ed1i ch\u1ee9ng l\u00e0 c\u00e1c gi\u1ed1ng keo lai \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn. K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 \u1edf th\u1eddi \u0111i\u1ec3m 38 th\u00e1ng tu\u1ed5i cho th\u1ea5y \u0111\u00e3 c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t gi\u1eefa c\u00e1c d\u00f2ng v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng, t\u1ef7 l\u1ec7 s\u1ed1ng c\u0169ng nh\u01b0 c\u00e1c ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y. Trong s\u1ed1 40 d\u00f2ng c\u00f3 10 d\u00f2ng \u0111\u1ea1t n\u0103ng su\u1ea5t t\u1eeb 31,0 – 37,8 m3<\/sup>\/ha\/n\u0103m. Gi\u1eefa c\u00e1c d\u00f2ng c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t v\u1ec1 t\u1ef7 l\u1ec7 b\u1ecb b\u1ec7nh v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb b\u1ec7nh ch\u1ebft h\u00e9o do n\u1ea5m Ceratocystis<\/em>. C\u00e1c d\u00f2ng sinh tr\u01b0\u1edfng nhanh \u0111\u1ec1u c\u00f3 t\u1ef7 l\u1ec7 b\u1ecb b\u1ec7nh d\u01b0\u1edbi 25%, trong \u0111\u00f3 3 d\u00f2ng BB001, BV518, BV334 c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng tr\u00ean 70% \u0111\u1ed3ng th\u1eddi c\u00f3 h\u00ecnh d\u1ea1ng th\u00e2n \u0111\u1eb9p ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c ti\u00eau ch\u1ecdn l\u1ecdc c\u00e1c d\u00f2ng keo lai t\u1ef1 nhi\u00ean m\u1edbi nh\u1eb1m n\u00e2ng cao gi\u00e1 tr\u1ecb v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a r\u1eebng tr\u1ed3ng ph\u1ee5c v\u1ee5 s\u1ea3n xu\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> Keo lai t\u1ef1 nhi\u00ean, d\u00f2ng v\u00f4 t\u00ednh, sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t, ch\u1ed1ng ch\u1ecbu b\u1ec7nh<\/td>\n<\/tr>\n

\n

<\/a>Growth of newly selected natural acacia hybrid (Acacia mangium <\/em>\u00d7<\/em>
\nA. <\/em>auriculiformis<\/em>)<\/em> clones in Dinh Quan, Dong Nai<\/strong><\/p>\n

The objective of this research was to select new acacia hybrid clones for reforestation in the Southeast provinces. The research was conducted in a acacia hybrid clonal trial in Thanh Son commune, Dinh Quan district, Dong Nai province which included 38 newly selected acacia hybrid clones and 2 commercial clones as controls. The growth evaluation result at 38 months of age showed significant differences between clones in all growth traits, survival as well as stem quality. Among these clones, there were 10 clones reached yield from 31.0 to 37.8 m3<\/sup>\/ha\/year. Significant difference between clones was recorded in the infection percentage and severity of stem canker and wilt caused by Ceratocystis<\/em>. All fast-growing clones had disease infection percentage below 25%, of which 3 clones BB001, BV518, BV334 had survival percentage of over 70% and had good stem quality. These newly selected natural acacia hybrid clones are promising to improve productivity of planted forest for wood production.<\/p>\n

Keywords:<\/em> Acacia hybrid, clone, growth, yield, disease tolerance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>SINH TR\u01af\u1edeNG C\u1ee6A KEO L\u00c1 TR\u00c0M TRONG C\u00c1C M\u00d4 H\u00ccNH\u00a0KH\u1ea2O NGHI\u1ec6M GI\u1ed0NG V\u00c0 \u1ee8NG D\u1ee4NG TI\u1ebeN B\u1ed8 K\u1ef8 THU\u1eacT\u00a0TR\u1ed2NG R\u1eeaNG CUNG C\u1ea4P G\u1ed6 L\u1edaN T\u1ea0I T\u1ec8NH QU\u1ea2NG TR\u1eca<\/p>\n

<\/a>V\u0169 \u0110\u1ee9c B\u00ecnh, Nguy\u1ec5n Th\u1ecb Thanh Nga, Ph\u1ea1m Xu\u00e2n \u0110\u1ec9nh, L\u00ea Th\u1ecb Nh\u01b0 Nguy\u1ec7t,
\nTr\u1ea7n Th\u1ecb T\u01b0\u1eddng V\u00e2n, L\u00ea Xu\u00e2n To\u00e0n, L\u00ea Th\u1ecb Tuy\u1ebft, Nguy\u1ec5n Th\u1ecb Th\u1ea3o Trang,
\nNguy\u1ec5n T\u00f9ng L\u00e2m, Ho\u00e0ng V\u0103n Tu\u1ea5n<\/p>\n

Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p B\u1eafc Trung B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o n\u00e0y gi\u1edbi thi\u1ec7u k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt v\u1ec1 gi\u1ed1ng v\u00e0 l\u00e2m sinh x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i Qu\u1ea3ng Tr\u1ecb do Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p B\u1eafc Trung B\u1ed9 th\u1ef1c hi\u1ec7n t\u1eeb 2017 – 2021. Sau 50 th\u00e1ng tu\u1ed5i, c\u00e1c m\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m \u0111\u1ec1u c\u00f3 sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n t\u1ed1t, \u0111\u1ed3ng \u0111\u1ec1u, t\u1ef7 l\u1ec7 s\u1ed1ng cao (>90%). K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 kh\u1ea3o nghi\u1ec7m c\u00e1c d\u00f2ng v\u00f4 t\u00ednh Keo l\u00e1 tr\u00e0m cho th\u1ea5y c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t v\u1ec1 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 c\u00e1c ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng. N\u0103ng su\u1ea5t trung b\u00ecnh to\u00e0n kh\u1ea3o nghi\u1ec7m \u0111\u1ea1t 20,4 m3<\/sup>\/ha\/n\u0103m, dao \u0111\u1ed9ng t\u1eeb 18,7 \u0111\u1ebfn 23,6 m3<\/sup>\/ha\/n\u0103m. N\u0103ng su\u1ea5t c\u1ee7a 4 d\u00f2ng g\u1ed3m Clt26, Clt43, Clt57, Clt7<\/em> \u0111\u1ec1u \u0111\u1ea1t tr\u00ean 20 m3<\/sup>\/ha\/n\u0103m v\u00e0 \u0111\u00e3 ch\u1ee9ng t\u1ecf c\u00f3 tri\u1ec3n v\u1ecdng v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ed1i v\u1edbi v\u00f9ng \u0111\u1ea5t \u0111\u1ed3i n\u00fai t\u1ec9nh Qu\u1ea3ng Tr\u1ecb. M\u00f4 h\u00ecnh Keo l\u00e1 tr\u00e0m m\u00f4 c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi m\u00f4 h\u00ecnh Keo l\u00e1 tr\u00e0m hom. Tuy nhi\u00ean, v\u1ec1 ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y th\u00ec kh\u00f4ng c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t gi\u1eefa hai lo\u1ea1i m\u00f4 h\u00ecnh n\u00e0y. N\u0103ng su\u1ea5t trung b\u00ecnh c\u1ee7a m\u00f4 h\u00ecnh Keo l\u00e1 tr\u00e0m m\u00f4 v\u00e0 Keo l\u00e1 tr\u00e0m hom \u0111\u1ea1t t\u01b0\u01a1ng \u1ee9ng l\u00e0 20,7 m3<\/sup>\/ha\/n\u0103m v\u00e0 19,2 m3<\/sup>\/ha\/n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> G\u1ed7 l\u1edbn, Keo l\u00e1 tr\u00e0m, k\u1ef9 thu\u1eadt l\u00e2m sinh<\/td>\n<\/tr>\n

\n

<\/a>Growth of Acacia auriculiformis<\/em> in trial models and application of advanced technology in clones, silviculture for sawlog production in Quang Tri province<\/strong><\/p>\n

This article introduces the results of application of technical progess in seedlings and silviculture to build a Acacia auriculiformis <\/em>plantation trial for sawlog in Quang Tri, conducted by the Forest Science Centre for North Central Vietnam since 2017 to 2021. After 50 months, the trials had good growth and high survival rates (>90%). The results showed that there were significant differences in growth and stem quality of Acacia auriculiformis <\/em>clones. The mean productivity of the trials was 20.4 m3<\/sup>\/ha\/year, ranging from 18.7 to 23.6 m3<\/sup>\/ha\/year. Productivity of 4 clones (Clt26, Clt43, Clt57, Clt7<\/em>) were over 20.0 m3<\/sup>\/ha\/year that proved to be promising clones for plantation forest in mountainous areas of Quang Tri province. The tissue culture of Acacia auriculiformis <\/em>trial had better growth than the cuttings of Acacia auriculiformis <\/em>trial, however, there was no significant difference in terms of stem quality. The mean productivities of tissue culture and cuttings trials were 20.7 m3<\/sup>\/ha\/year and 19.2 m3<\/sup>\/ha\/year, respectively.<\/p>\n

Keywords:<\/em> Sawlog, Acacia<\/em> auriculiformis<\/em>, silviculture techniques<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>TH\u1ef0C TR\u1ea0NG QU\u1ea2N L\u00dd V\u00c0 C\u00c1C GI\u1ea2I PH\u00c1P T\u1ed4NG H\u1ee2P\u00a0PH\u00c1T TRI\u1ec2N B\u1ec0N V\u1eeeNG R\u1eeaNG PH\u00d2NG H\u1ed8 V\u00c0 R\u1eeaNG \u0110\u1eb6C D\u1ee4NG TR\u00caN \u0110\u1ecaA B\u00c0N TH\u00c0NH PH\u1ed0 H\u00c0 N\u1ed8I<\/p>\n

<\/a>Ph\u1ea1m \u0110\u00f4n1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup>, B\u00f9i Ki\u1ec1u H\u01b0ng1<\/sup>, Phan Th\u1ecb Luy\u1ebfn1<\/sup>, T\u1ea1 Nh\u1eadt V\u01b0\u01a1ng1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u v\u00e0 Chuy\u1ec3n giao K\u1ef9 thu\u1eadt l\u00e2m sinh
\n<\/sup>2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Di\u1ec7n t\u00edch r\u1eebng ph\u00f2ng h\u1ed9 v\u00e0 r\u1eebng \u0111\u1eb7c d\u1ee5ng \u1edf Th\u00e0nh ph\u1ed1 H\u00e0 N\u1ed9i tuy kh\u00f4ng l\u1edbn nh\u01b0ng c\u00f3 vai tr\u00f2 r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c t\u1ea1o d\u1ef1ng c\u1ea3nh quan v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i. C\u00e1c khu r\u1eebng ph\u00f2ng h\u1ed9 v\u00e0 \u0111\u1eb7c d\u1ee5ng t\u1ea1i H\u00e0 N\u1ed9i \u0111\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1eb7c bi\u1ec7t v\u1ec1 c\u1ea3nh quan g\u1eafn li\u1ec1n v\u1edbi c\u00e1c khu di t\u00edch l\u1ecbch s\u1eed, v\u0103n h\u00f3a quan tr\u1ecdng \u0111\u01b0\u1ee3c \u01b0u ti\u00ean b\u1ea3o v\u1ec7 c\u1ee7a Th\u1ee7 \u0111\u00f4 nh\u01b0 khu di t\u00edch \u0110\u1ec1n Gi\u00f3ng; di t\u00edch \u0110\u1ec1n Th\u01b0\u1ee3ng, \u0110\u1ec1n th\u1edd B\u00e1c H\u1ed3; Di t\u00edch v\u00e0 Th\u1eafng c\u1ea3nh H\u01b0\u01a1ng S\u01a1n,… r\u1eebng ph\u00f2ng h\u1ed9 v\u00e0 r\u1eebng \u0111\u1eb7c d\u1ee5ng tr\u00ean Th\u00e0nh ph\u1ed1 H\u00e0 N\u1ed9i \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n c\u1ea5p qu\u1ea3n l\u00fd theo c\u00e1c quy \u0111\u1ecbnh c\u1ee7a Nh\u00e0 n\u01b0\u1edbc v\u00e0 c\u1ee7a Th\u00e0nh ph\u1ed1 H\u00e0 N\u1ed9i. V\u1ec1 c\u01a1 b\u1ea3n r\u1eebng \u0111\u00e3 \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd \u0111\u00fang m\u1ee5c \u0111\u00edch theo c\u00e1c ch\u00ednh s\u00e1ch hi\u1ec7n h\u00e0nh v\u00e0 ph\u00e1t huy \u0111\u01b0\u1ee3c ch\u1ee9c n\u0103ng, hi\u1ec7u qu\u1ea3 c\u1ee7a r\u1eebng. \u0110\u1ec3 qu\u1ea3n l\u00fd v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng ph\u00f2ng h\u1ed9 v\u00e0 r\u1eebng \u0111\u1eb7c d\u1ee5ng tr\u00ean \u0111\u1ecba b\u00e0n TP. H\u00e0 N\u1ed9i b\u1ec1n v\u1eefng c\u1ea7n th\u1ef1c hi\u1ec7n \u0111\u1ed3ng b\u1ed9 c\u00e1c gi\u1ea3i ph\u00e1p v\u1ec1 ho\u00e0n thi\u1ec7n c\u01a1 ch\u1ebf, ch\u00ednh s\u00e1ch qu\u1ea3n l\u00fd r\u1eebng ph\u00f2ng h\u1ed9, r\u1eebng \u0111\u1eb7c d\u1ee5ng, trong \u0111\u00f3 ch\u00fa tr\u1ecdng v\u00e0o c\u1ea5p gi\u1ea5y ch\u1ee9ng nh\u1eadn quy\u1ec1n s\u1eed d\u1ee5ng \u0111\u1ea5t, kho\u00e1n b\u1ea3o v\u1ec7 r\u1eebng, ch\u00ednh s\u00e1ch khoa h\u1ecdc, c\u00f4ng ngh\u1ec7 g\u1eafn v\u1edbi b\u1ea3o t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng r\u1eebng ph\u00f2ng h\u1ed9, r\u1eebng \u0111\u1eb7c d\u1ee5ng, chi tr\u1ea3 d\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng r\u1eebng, ph\u00e1t tri\u1ec3n du l\u1ecbch sinh th\u00e1i, thu\u00ea m\u00f4i tr\u01b0\u1eddng r\u1eebng,…<\/p>\n

T<\/em>\u1eeb kh\u00f3a:<\/em> R\u1eebng ph\u00f2ng h\u1ed9, r\u1eebng \u0111\u1eb7c d\u1ee5ng, qu\u1ea3n l\u00fd r\u1eebng, Th\u00e0nh ph\u1ed1 H\u00e0 N\u1ed9i<\/td>\n<\/tr>\n

\n

<\/a>Current management status and integrated measures for sustainable development of protection and special use forest in Hanoi city<\/strong><\/p>\n

Area of protection and special-use forest in Hanoi is not large but plays an important role in landscape creation and environmental protection. All protection and special-use forest areas in Hanoi have a special landscape value in conjunction with important historical and cultural relics of the the Capital to be conserved with high priority such as Thanh Giong, Thuong and Ho Chi Minh temple relics; Huong Son beauty spot,… Protection and special use forest of Hanoi were under decentralized management according to the regulation of the State and Hanoi city. Forest in Hanoi was managed effectively in line with forest types based upon current policies\/mechanism. In order to manage and develop protection and special use forest in Hanoi sustainably a series of solutions on forest management policy\/mechanism improvement should be applied, of which the emphases are given to issue land used right certificate, implementation of forest protection contraction, application of science-technology advanced techniques in line with conservation and development of protection and special use forest, payment for forest environmental services, eco-tourism development, forest environment lease,…<\/p>\n

Keywords:<\/em> Protection forest, special-use forest, forest management, Hanoi city<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a><\/a><\/a><\/a><\/a><\/a><\/a>\u0110\u1eb6C \u0110I\u1ec2M H\u1ec6 SINH TH\u00c1I R\u1eeaNG N\u00daI \u0110\u00c1 T\u1ea0I KHU R\u1eeaNG \u0110\u1eb6C D\u1ee4NG B\u1ea2O V\u1ec6 C\u1ea2NH QUAN V\u1ecaNH H\u1ea0 LONG, T\u1ec8NH QU\u1ea2NG NINH<\/p>\n

<\/a>Cao V\u0103n L\u1ea1ng1<\/sup>, V\u0169 Duy V\u0103n2<\/sup>, Tr\u1ecbnh Ng\u1ecdc Bon3<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh3<\/sup>, Ho\u00e0ng Th\u1ecb Nhung3<\/sup>, Nguy\u1ec5n V\u0103n Tu\u1ea5n3<\/sup>, Ph\u1ea1m V\u0103n Vi\u1ec7n1<\/sup>, Tr\u1ea7n Xu\u00e2n An1<\/sup>, Ho\u00e0ng V\u0103n Th\u1eafng1<\/sup><\/p>\n

1Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2S\u1edf N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n t\u1ec9nh Qu\u1ea3ng Ninh
\n3Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra \u0111\u1eb7c \u0111i\u1ec3m h\u1ec7 sinh th\u00e1i r\u1eebng n\u00fai \u0111\u00e1 Khu r\u1eebng \u0111\u1eb7c d\u1ee5ng b\u1ea3o v\u1ec7 c\u1ea3nh quan V\u1ecbnh H\u1ea1 Long t\u1ec9nh Qu\u1ea3ng Ninh cho th\u1ea5y, t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng n\u00fai \u0111\u00e1 trong khu v\u1ef1c l\u00e0 2.594,78 ha, v\u1edbi 4 c\u1ea5p tr\u1eef l\u01b0\u1ee3ng: R\u1eebng ngh\u00e8o ki\u1ec7t c\u00f3 di\u1ec7n t\u00edch l\u1edbn nh\u1ea5t 1.144,17 ha v\u1edbi tr\u1eef l\u01b0\u1ee3ng dao \u0111\u1ed9ng t\u1eeb 10,9 – 49,1 m3<\/sup>\/ha; r\u1eebng ngh\u00e8o 854,44 ha v\u1edbi tr\u1eef l\u01b0\u1ee3ng dao \u0111\u1ed9ng t\u1eeb 50,5 – 82,1 m3<\/sup>\/ha; ti\u1ebfp \u0111\u1ebfn tr\u1ea1ng th\u00e1i r\u1eebng ch\u01b0a c\u00f3 tr\u1eef l\u01b0\u1ee3ng l\u00e0 370,73 ha v\u1edbi tr\u1eef l\u01b0\u1ee3ng dao \u0111\u1ed9ng t\u1eeb 5,2 – 5,9 m3<\/sup>\/ha v\u00e0 \u00edt nh\u1ea5t l\u00e0 tr\u1ea1ng th\u00e1i r\u1eebng trung b\u00ecnh ch\u1ec9 c\u00f3 225,44 ha v\u1edbi tr\u1eef l\u01b0\u1ee3ng dao \u0111\u1ed9ng t\u1eeb 103,3 – 115,6 m3<\/sup>\/ha. M\u1eadt \u0111\u1ed9 t\u1ea7ng c\u00e2y cao dao \u0111\u1ed9ng t\u1eeb 410 – 795 c\u00e2y\/ha v\u1edbi s\u1ed1 lo\u00e0i dao \u0111\u1ed9ng t\u1eeb 17 – 145 lo\u00e0i, s\u1ed1 lo\u00e0i tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh dao \u0111\u1ed9ng t\u1eeb 2 – 8 lo\u00e0i, ch\u1ec9 c\u00f3 tr\u1ea1ng th\u00e1i r\u1eebng ngh\u00e8o kh\u00f4ng h\u00ecnh th\u00e0nh c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh (IV% <5%). M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh c\u1ee7a c\u00e1c tr\u1ea1ng th\u00e1i thu\u1ed9c h\u1ec7 sinh th\u00e1i r\u1eebng n\u00fai \u0111\u00e1 dao \u0111\u1ed9ng t\u1eeb 6.422 – 8.160 c\u00e2y\/ha, trong \u0111\u00f3 t\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh c\u00f3 tri\u1ec3n v\u1ecdng dao \u0111\u1ed9ng t\u1eeb 23,5 – 43,9%. S\u1ed1 lo\u00e0i c\u00e2y t\u00e1i sinh \u1edf c\u00e1c tr\u1ea1ng th\u00e1i dao \u0111\u1ed9ng t\u1eeb 35 – 170 lo\u00e0i, trong \u0111\u00f3 s\u1ed1 lo\u00e0i tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh dao \u0111\u1ed9ng t\u1eeb 2 – 9 lo\u00e0i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> \u0110\u1eb7c \u0111i\u1ec3m, h\u1ec7 sinh th\u00e1i r\u1eebng, n\u00fai \u0111\u00e1, V\u1ecbnh H\u1ea1 Long<\/td>\n<\/tr>\n

\n

<\/a>Characteristics of the mountine forest in the special forest protecting the landscape of Ha Long Bay, Quang Ninh province<\/strong><\/p>\n

The survey results on the characteristics of the rocky forest ecological system in The special forest used for landscape protection in Ha Long Bay, Quang Ninh province showed that, the total area in the area is \u200b\u200b2,594.78 hectares, with a 4 – level equipment volume: The poorest forest has the largest area 1,144.17 ha with volumes ranging from 10.9 – 49.1 m3<\/sup>\/ha; poor forest 854.44 ha with volume ranging from 50,5 – 82.1 m3<\/sup>\/ha; next to the state forest without the amount is 370.73 ha with the volume ranging from 5.2 – 5.9 m3<\/sup>\/ha and at least the average forest is only 225.44 ha with the volume ranging from the 103.3 – 115.6 m3<\/sup>\/ha. Density of timber is from 410 – 795 trees\/ha with the number of species ranging from 17 – 145 species, the number of species participating in the o composition formula ranges from 2 – 8 species, only the poor forest status is not have composition formula (IV%<5%). The density of regenerative trees of the rocky mountain forest ecosystem ranges from 6,422 – 8,160 trees\/ha, in which the rate of promising regenerated trees ranges from 23.5 – 43.9%. The number of tree species regenerated in different forest ranges from 35 – 170 species, of which the number of species participating in the composition formula ranges from 2 – 9 species.<\/p>\n

Keywords:<\/em> Characteristics, forest ecosystem, rock mountain, Ha Long Bay<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A QU\u1ea2N L\u00dd V\u1eacT LI\u1ec6U H\u1eeeU C\u01a0 SAU KHAI TH\u00c1C\u00a0\u0110\u1ebeN T\u00cdNH CH\u1ea4T \u0110\u1ea4T V\u00c0 N\u0102NG SU\u1ea4T R\u1eeaNG TR\u1ed2NG KEO L\u00c1 TR\u00c0M\u00a03 TU\u1ed4I \u1ede CHU K\u1ef2 4 T\u1ea0I PH\u00da B\u00ccNH, B\u00ccNH D\u01af\u01a0NG<\/p>\n

<\/a>Ki\u1ec1u M\u1ea1nh H\u00e01<\/sup>, V\u0169 \u0110\u00ecnh H\u01b0\u1edfng1<\/sup>, Nguy\u1ec5n Xu\u00e2n H\u1ea3i1<\/sup>,
\nL\u00ea Thanh Quang2\u00ad<\/sup>,<\/sub> Nguy\u1ec5n V\u0103n \u0110\u0103ng1<\/sup>, Ninh V\u0103n Tu\u1ea5n 1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m \u1ee8ng d\u1ee5ng Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Nam B\u1ed9
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Qu\u1ea3n l\u00fd v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c l\u00e0 m\u1ed9t trong nh\u1eefng bi\u1ec7n ph\u00e1p qu\u1ea3n l\u00fd l\u1eadp \u0111\u1ecba nh\u1eb1m n\u00e2ng cao \u0111\u1ed9 ph\u00ec \u0111\u1ea5t v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng. R\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m chu k\u1ef3 4 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp t\u1ea1i Ph\u00fa B\u00ecnh, t\u1ec9nh B\u00ecnh D\u01b0\u01a1ng v\u1edbi 3 c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m kh\u00e1c nhau, bao g\u1ed3m: (i) FL<\/sub> (L\u1ea5y \u0111i to\u00e0n b\u1ed9 v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c); (ii) FM<\/sub> (\u0110\u1ec3 lo\u1ea1i to\u00e0n b\u1ed9 v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c); (iii) FH<\/sub> nh\u01b0 FM<\/sub> k\u1ebft h\u1ee3p b\u00f3n l\u00f3t 30kg P\/ha). Sau 3 n\u0103m th\u00ed nghi\u1ec7m, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, n\u1ed3ng \u0111\u1ed9 pH dao \u0111\u1ed9ng \u1edf m\u1ee9c th\u1ea5p, pH(H2<\/sub>O) \u0111\u1ea1t 4,69 \u00b1 0,03 (t\u1ea7ng \u0111\u1ea5t 0 – 10 cm) v\u00e0 4,63 \u00b1 0,04 (t\u1ea7ng \u0111\u1ea5t 10 – 20 cm). \u0110\u1ec3 l\u1ea1i v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c k\u1ebft h\u1ee3p b\u00f3n 30 kg P\/ha l\u00e0m t\u0103ng h\u00e0m l\u01b0\u1ee3ng t\u00edch l\u0169y C trong \u0111\u1ea5t v\u00e0 c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng P, K, Ca, Mg l\u1ea7n l\u01b0\u1ee3t l\u00e0 20%, 12,3%, 12,2%, 10,4%, 14,4% (\u1edf t\u1ea7ng \u0111\u1ea5t 0 – 10 cm) v\u00e0 10%, 6,1%, 9,4%, 8,3%, 14,2% (t\u1ea7ng \u0111\u1ea5t 10 – 20 cm) so v\u1edbi l\u1ea5y \u0111i to\u00e0n b\u1ed9 v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c. Kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u1ef7 l\u1ec7 s\u1ed1ng gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c v\u00e0 t\u1ef7 l\u1ec7 s\u1ed1ng gi\u1ea3m d\u1ea7n theo th\u1eddi gian t\u1eeb 1 \u0111\u1ebfn 3 tu\u1ed5i (~ 90%). C\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 n\u0103ng su\u1ea5t r\u1eebng gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c. Sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 n\u0103ng su\u1ea5t \u1edf c\u00f4ng th\u1ee9c FH cao h\u01a1n c\u00f4ng th\u1ee9c FL l\u1ea7n l\u01b0\u1ee3t l\u00e0 7,3%, 3,2% v\u00e0 16%. T\u1eeb k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u1ee9ng t\u1ecf r\u1eb1ng c\u00f3 c\u01a1 h\u1ed9i duy tr\u00ec v\u00e0 n\u00e2ng cao n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m b\u1eb1ng vi\u1ec7c \u0111\u1ec3 l\u1ea1i v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c v\u00e0 b\u00f3n l\u00f3t 30kg P\/ha.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> \u0110\u1ed9 ph\u00ec \u0111\u1ea5t, Keo l\u00e1 tr\u00e0m, n\u0103ng su\u1ea5t, qu\u1ea3n l\u00fd v\u1eadt li\u1ec7u h\u1eefu c\u01a1<\/td>\n<\/tr>\n

\n

<\/a>Effects of slash managenment on soil property and productivity of the Acacia auriculiformis <\/em>plantation 3-year-old, rotation 4, Phu Binh, Binh Duong<\/strong><\/p>\n

Slash management is one of technical methods in site management to improve soil fertility and plantation productivity. Rotation four of the Acacia auriculiformis <\/em>plantation established at Phu Binh, Binh Duong province with three treatments as follows: (i) FL<\/sub>: The whole tree was harvested and then all aboveground biomass, including litter and understory, was removed. This was repeated at every rotation; (ii) FM<\/sub>: Only merchantable stem wood (\u22653 cm in diameter with bark) was harvested; all slash and litter retained. This treatment was reapplied at every rotation; (iii) FH<\/sub>: as FM <\/sub>plus each tree received superphosphate at 20 g tree\u22121<\/sup><\/strong> P (~30 kg ha\u22121<\/sup><\/strong> P) mixed with soil at the bottom of the planting holes before planting. Three years after planting, the results showed that: There was no significant difference between treatments in pH for both soil depths (0 – 10 cm and 10 – 20 cm), with pHH<\/sub>2O <\/sub>= 4.69 \u00b1 0.03 and pHH20 <\/sub>= 4.63 \u00b1 0.04, respectively. Slash retention plus applying 30 kg P ha-1 at planting (treatment FH<\/sub>) improved C, P, K, Ca and Mg in soil depths (0 – 10 cm and 10 – 20 cm) by 20%, 12.3%, 12.2%, 10.4%, 14.4% and 10%, 6.1%, 9.4%, 8.3%, 14.2%, respectively that compared to slash and litter removed (treatment FL<\/sub>). There was also no significant difference between treatments in survival rate and this rate decreased by time and was about 90% at 3 – year-old of the plantation. There were significant differences between treatments in diameter, height and productivity. Increment of diameter, height and productivity in treatments FH<\/sub> were greater than that in treatment FL<\/sub> by 7.3%, 3.2% and 16%, respectively. Overall results demonstrate that there is an opportunity to increase and sustain productivity of Acacia auriculiformis<\/em> plantations over successive rotations by slash retention after harvesting and applying P fertilizer (30 kg\/ha).<\/p>\n

Keywords:<\/em> Soil fertility, Acacia auriculiformis<\/em>, productivity, slash management<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110A D\u1ea0NG H\u1ec6 TH\u1ef0C V\u1eacT R\u1eeaNG\u00a0T\u1ea0I KHU R\u1eeaNG \u0110\u1eb6C D\u1ee4NG XU\u00c2N NHA, T\u1ec8NH S\u01a0N LA\u00a0V\u00c0 \u0110\u1ec0 XU\u1ea4T C\u00c1C GI\u1ea2I PH\u00c1P B\u1ea2O T\u1ed2N \u0110A D\u1ea0NG SINH H\u1eccC<\/p>\n

<\/a>\u0110inh C\u00f4ng Tr\u00ecnh1<\/sup>, Nguy\u1ec5n Duy Kh\u00e1nh1<\/sup>, Nguy\u1ec5n V\u0103n H\u00f9ng1<\/sup>,
\nHo\u00e0ng Thanh S\u01a1n2<\/sup>, H\u00e0 V\u0103n Ti\u1ec7p1<\/sup>.<\/p>\n

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

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra \u0111a d\u1ea1ng th\u1ef1c v\u1eadt t\u1ea1i khu r\u1eebng \u0111\u1eb7c d\u1ee5ng Xu\u00e2n Nha, t\u1ec9nh S\u01a1n La \u0111\u00e3 ghi nh\u1eadn \u0111\u01b0\u1ee3c 1.131 lo\u00e0i th\u1ef1c v\u1eadt, thu\u1ed9c 5 ng\u00e0nh th\u1ef1c v\u1eadt (ng\u00e0nh Th\u00f4ng \u0111\u1ea5t, ng\u00e0nh D\u01b0\u01a1ng x\u1ec9, ng\u00e0nh C\u1ecf th\u1ea5p b\u00fat, ng\u00e0nh Th\u00f4ng v\u00e0 ng\u00e0nh H\u1ea1t k\u00edn), v\u1edbi 12 nh\u00f3m d\u1ea1ng s\u1ed1ng kh\u00e1c nhau, trong \u0111\u00f3 c\u00e2y g\u1ed7 l\u00e0 nh\u00f3m c\u00f3 s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i l\u1edbn nh\u1ea5t v\u1edbi 438 lo\u00e0i chi\u1ebfm 38,73% t\u1ed5ng s\u1ed1 lo\u00e0i \u0111i\u1ec1u tra, c\u00f3 63 lo\u00e0i, 22 chi, 4 h\u1ecd l\u00e0 ph\u00e1t hi\u1ec7n m\u1edbi so v\u1edbi danh m\u1ee5c lo\u00e0i \u0111\u00e3 c\u00f4ng b\u1ed1 t\u1ea1i khu v\u1ef1c nghi\u00ean c\u1ee9u n\u0103m 2017. X\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 904 lo\u00e0i thu\u1ed9c 18 y\u1ebfu t\u1ed1 \u0111\u1ecba l\u00fd th\u1ef1c v\u1eadt kh\u00e1c nhau, c\u00f2n l\u1ea1i 227 lo\u00e0i thu\u1ed9c nh\u00f3m ch\u01b0a x\u00e1c \u0111\u1ecbnh. Ghi nh\u1eadn \u0111\u01b0\u1ee3c 21 lo\u00e0i trong S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam, 42 lo\u00e0i trong Ngh\u1ecb \u0111\u1ecbnh 06\/N\u0110-CP v\u00e0 26 lo\u00e0i c\u00f3 gi\u00e1 tr\u1ecb b\u1ea3o t\u1ed3n trong Danh l\u1ee5c \u0110\u1ecf th\u1ebf gi\u1edbi IUCN v\u00e0 ph\u00e1t hi\u1ec7n 2 lo\u00e0i b\u1ed5 sung cho h\u1ec7 th\u1ef1c v\u1eadt Vi\u1ec7t Nam, 3 lo\u00e0i m\u1edbi cho h\u1ec7 th\u1ef1c v\u1eadt Vi\u1ec7t Nam v\u00e0 th\u1ebf gi\u1edbi. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u0169ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c m\u1ed1i \u0111e d\u1ecda \u0111\u1ebfn s\u1ef1 \u0111a d\u1ea1ng h\u1ec7 th\u1ef1c v\u1eadt v\u00e0 \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o t\u1ed3n cho Khu r\u1eebng \u0111\u1eb7c d\u1ee5ng Xu\u00e2n Nha.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> B\u1ea3o t\u1ed3n, \u0111a d\u1ea1ng, h\u1ec7 th\u1ef1c v\u1eadt, Xu\u00e2n Nha<\/td>\n<\/tr>\n

\n

<\/a>Research on the diversity of plants in special used forest Xua Nha, Son La province and recomemdations for biodiversity conservation<\/strong><\/p>\n

The results of research showed that 1,131 plant species were identified that belonged to Lycopodiophyta, Polypodiophyta, Equisetophyta, Pinophyta, Magnoliophyta with 12 life form group in which woody plant was largest with 438 species accounted for 38.73% of total identified species, 65 species, 22 gennera and 4 families were newly recorded comparing with the prior list of plants identified and published in 2017. In addition, recognized 904 plant species origined from 18 different phyto-geographical elements, the rest of 227 plant species were not reconiged. Moreover, identified 21 plant species in Vietnam\u2019s redbook and 42 plant species were in the Decree 06\/ND-CP of Vietnamese goverment and 26 plant species in IUCN redlist, 2 plant species newly recored for Vietnam\u2019s flora and 3 plant species for Vietnam and international flora. The threaten factors damaging on biodiversity conservation of flora were reconiged and the measures for biodiversity conservation in special used forest Xuan Nha also recommended.<\/p>\n

Keywords:<\/em> Conservation, diversity, flora, Xuan Nha<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TH\u1eec NGHI\u1ec6M X\u00c2Y D\u1ef0NG CH\u01af\u01a0NG TR\u00ccNH HI\u1ec6U CH\u1ec8NH \u1ea2NH H\u01af\u1edeNG C\u1ee6A \u0110\u1ecaA H\u00ccNH TR\u00caN \u1ea2NH V\u1ec6 TINH – TR\u01af\u1edcNG H\u1ee2P TH\u1ef0C HI\u1ec6N\u00a0CHO \u1ea2NH LANDSAT-8 TR\u00caN N\u1ec0N T\u1ea2NG GOOGLE EARTH ENGINE<\/p>\n

<\/a>Ph\u1ea1m V\u0103n Du\u1ea9n1<\/sup>, V\u0169 Th\u1ecb Th\u00ecn1<\/sup>, Ph\u1ea1m Ti\u1ebfn D\u0169ng2<\/sup><\/p>\n

1Vi\u1ec7n Sinh th\u00e1i r\u1eebng v\u00e0 M\u00f4i tr\u01b0\u1eddng – \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n<\/sup>\u00ad<\/sub>2<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n

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

Hi\u1ec7u ch\u1ec9nh \u0111\u1ecba h\u00ecnh tr\u00ean \u1ea3nh v\u1ec7 tinh l\u00e0 hi\u1ec7u ch\u1ec9nh gi\u00e1 tr\u1ecb ph\u1ea3n x\u1ea1 ph\u1ed5 c\u1ee7a k\u00eanh \u1ea3nh \u1edf nh\u1eefng khu v\u1ef1c b\u1ecb \u1ea3nh h\u01b0\u1edfng c\u1ee7a b\u00f3ng \u0111\u1ecba h\u00ecnh do \u0111\u1ed9 d\u1ed1c v\u00e0 \u0111i\u1ec1u ki\u1ec7n chi\u1ebfu s\u00e1ng c\u1ee7a m\u1eb7t tr\u1eddi g\u00e2y ra. Trong nghi\u00ean c\u1ee9u n\u00e0y, nh\u00f3m t\u00e1c gi\u1ea3 \u0111\u00e3 k\u1ebf th\u1eeba, ph\u00e2n t\u00edch c\u00e1c m\u00f4 h\u00ecnh th\u01b0\u1eddng \u00e1p d\u1ee5ng \u0111\u1ec3 hi\u1ec7u ch\u1ec9nh \u0111\u1ecba h\u00ecnh tr\u00ean \u1ea3nh v\u1ec7 tinh, t\u1eeb \u0111\u00f3 l\u1ef1a ch\u1ecdn c\u00e1c m\u00f4 h\u00ecnh \u0111\u1ea1i di\u1ec7n \u0111\u1ec3 x\u00e2y d\u1ef1ng ch\u01b0\u01a1ng tr\u00ecnh hi\u1ec7u ch\u1ec9nh th\u00f4ng qua l\u1eadp tr\u00ecnh tr\u00ean Google Earth Engine. C\u00e1c ch\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng \u0111\u1ec3 th\u1eed nghi\u1ec7m hi\u1ec7u ch\u1ec9nh cho \u1ea3nh Landsat-8 t\u1ea1i huy\u1ec7n L\u1eafk, t\u1ec9nh \u0110\u1eafk L\u1eafk. K\u1ebft qu\u1ea3 hi\u1ec7u ch\u1ec9nh b\u1eb1ng c\u00e1c m\u00f4 h\u00ecnh kh\u00e1c nhau \u0111\u01b0\u1ee3c so s\u00e1nh b\u1eb1ng ph\u00e2n t\u00edch tr\u1ef1c quan v\u00e0 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea nh\u1eb1m l\u1ef1a ch\u1ecdn ra m\u00f4 h\u00ecnh ph\u00f9 h\u1ee3p hi\u1ec7u ch\u1ec9nh \u0111\u1ecba h\u00ecnh t\u1ea1i khu v\u1ef1c. K\u1ebft qu\u1ea3 \u0111\u00e3 l\u1ef1a ch\u1ecdn 4 m\u00f4 h\u00ecnh, g\u1ed3m: m\u00f4 h\u00ecnh cosine, m\u00f4 h\u00ecnh C, m\u00f4 h\u00ecnh c\u1ea3m bi\u1ebfn m\u1eb7t tr\u1eddi (SCS) + C v\u00e0 m\u00f4 h\u00ecnh th\u1ef1c nghi\u1ec7m \u0111\u1ec3 th\u1eed nghi\u1ec7m x\u00e2y d\u1ef1ng ch\u01b0\u01a1ng tr\u00ecnh hi\u1ec7u ch\u1ec9nh, trong \u0111\u00f3 m\u00f4 h\u00ecnh th\u1ef1c nghi\u1ec7m \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ec3 hi\u1ec7u ch\u1ec9nh \u0111\u1ecba h\u00ecnh t\u1ea1i khu v\u1ef1c, ti\u1ebfp theo l\u00e0 m\u00f4 h\u00ecnh C ho\u1eb7c (SCS) + C. S\u1eed d\u1ee5ng ch\u01b0\u01a1ng tr\u00ecnh hi\u1ec7u ch\u1ec9nh x\u00e2y d\u1ef1ng b\u1eb1ng m\u00f4 h\u00ecnh th\u1ef1c nghi\u1ec7m \u0111\u1ec3 hi\u1ec7u ch\u1ec9nh \u0111\u1ecba h\u00ecnh tr\u00ean \u1ea3nh Landsat-8 t\u1ea1i: Huy\u1ec7n Cao Phong, t\u1ec9nh H\u00f2a B\u00ecnh; Huy\u1ec7n Ba Ch\u1ebd, t\u1ec9nh Qu\u1ea3ng Ninh; Huy\u1ec7n Nh\u01b0 Thanh, t\u1ec9nh Thanh H\u00f3a; Huy\u1ec7n T\u00e2n Ph\u00fa, t\u1ec9nh \u0110\u1ed3ng Nai \u0111\u1ec1u cho k\u1ebft qu\u1ea3 hi\u1ec7u ch\u1ec9nh t\u01b0\u01a1ng \u0111\u1ed1i ph\u00f9 h\u1ee3p cho ph\u00e9p \u1ee9ng d\u1ee5ng ch\u01b0\u01a1ng tr\u00ecnh hi\u1ec7u ch\u1ec9nh n\u00e0y \u0111\u1ec3 hi\u1ec7u ch\u1ec9nh \u0111\u1ecba h\u00ecnh tr\u00ean \u1ea3nh Landsat-8 t\u1ea1i Vi\u1ec7t Nam.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> Hi\u1ec7u ch\u1ec9nh \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ecba h\u00ecnh, Google Earth Engine, landsat-8, SRTM DEM<\/td>\n<\/tr>\n

\n

<\/a>Test to build a program to adjust the effect of terrain on satellite images – case for Landsat-8 imagery on the Google Earth Engine platform<\/strong><\/p>\n

Adjusting terrain on a satellite image is adjusting of the spectral reflection value of the image channel in the areas affected by the terrain shadow caused by the slope and lighting conditions of the sun. In this study, the authors inherited and analyzed models commonly applied to adjust the terrain on satellite imagery from which to select representative models to build a program to adjust through programming on Google Earth Engine. The programs were developed to test to adjust Landsat-8 images in Lak district, Dak Lak province. Adjusting results by different models were compared by visualized analysis and statistical analysis in order to select a suitable model for terrain adjusting in the area. The results have selected 4 models, including: cosine model, C model, solar sensor model (SCS) + C and experimental model to test and build an adjusting program, in which the experimental model was evaluated as the most suitable for adjusting the terrain in the area, the second one is model C or model (SCS) + C. Using the adjusting program built by experimental models to adjust the terrain on Landsat-8 images in Cao Phong District, Hoa Binh Province; Ba Che district, Quang Ninh province; Nhu Thanh district, Thanh Hoa province; Tan Phu district, Dong Nai province showed relatively suitable adjusting results allowing the application of this adjusting program to adjust the terrain on Landsat-8 images in Vietnam.<\/p>\n

Keywords:<\/em><\/strong> Terrain correction, Google Earth Engine, landsat-8, SRTM DEM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>\u0110\u1eb6C \u0110I\u1ec2M SINH TR\u01af\u1edeNG C\u00c1C LO\u00c0I C\u00c2Y TR\u1ed2NG R\u1eeaNG NG\u1eacP M\u1eb6N TR\u00caN C\u00c1C NH\u00d3M D\u1ea0NG L\u1eacP \u0110\u1ecaA VEN BI\u1ec2N T\u1ea0I NGHI XU\u00c2N, H\u00c0 T\u0128NH<\/p>\n

<\/a>Ph\u1ea1m V\u0103n Ng\u00e2n1<\/sup>, Ng\u00f4 \u0110\u00ecnh Qu\u1ebf2<\/sup>, V\u0169 T\u1ea5n Ph\u01b0\u01a1ng3<\/sup>, L\u00ea \u0110\u1ee9c Th\u1eafng1<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u v\u00e0 Ph\u00e1t tri\u1ec3n V\u00f9ng – B\u1ed9 Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7
\n2<\/sup> H\u1ed9i Khoa h\u1ecdc v\u00e0 K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y tr\u1ed3ng r\u1eebng ng\u1eadp m\u1eb7n ven bi\u1ec3n ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 c\u1ea5u th\u00e0nh nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba c\u0169ng nh\u01b0 lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng v\u00e0 ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng r\u1eebng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, c\u1ea3 hai c\u00f4ng th\u1ee9c tr\u1ed3ng h\u1ed7n giao B\u1ea7n chua (1.000 c\u00e2y\/ha) + Trang (1.600 c\u00e2y\/ha) v\u00e0 B\u1ea7n chua (1.000 c\u00e2y\/ha) + \u0110\u00e2ng (1.600 c\u00e2y\/ha) \u0111\u1ec1u cho c\u00e1c k\u1ebft qu\u1ea3 v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh t\u00e1n c\u00e2y t\u1ed1t nh\u1ea5t so v\u1edbi B\u1ea7n chua tr\u1ed3ng thu\u1ea7n lo\u00e0i tr\u00ean c\u1ea3 hai nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba (thu\u1eadn l\u1ee3i v\u00e0 kh\u00f3 kh\u0103n). C\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng tr\u00ean nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba thu\u1eadn l\u1ee3i cho c\u00e1c k\u1ebft qu\u1ea3 v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng \u0111\u1ea1t cao nh\u1ea5t v\u00e0 cao h\u01a1n c\u00f3 \u00fd ngh\u0129a th\u1ed1ng k\u00ea so v\u1edbi tr\u1ed3ng tr\u00ean nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba kh\u00f3 kh\u0103n. M\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng h\u1ed7n giao th\u00fac \u0111\u1ea9y sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y tr\u1ed3ng, s\u1edbm t\u1ea1o k\u1ebft c\u1ea5u r\u1eebng hai t\u1ea7ng v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 ph\u00f2ng h\u1ed9 ven bi\u1ec3n c\u1ee7a \u0111ai r\u1eebng ng\u1eadp m\u1eb7n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> Lo\u00e0i c\u00e2y tr\u1ed3ng, ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng, nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba, r\u1eebng ng\u1eadp m\u1eb7n<\/td>\n<\/tr>\n

\n

<\/a>Growth characteristics of forest plant species on groups of sites in coastal areas in Nghi Xuan, Ha Tinh<\/strong><\/p>\n

The characteristics of the groups of sites, the mangrove trees, and the planting method all have an impact on how mangrove trees grow along the shore. The study’s findings demonstrated that the greatest results were obtained using the mixed planting formulas Sonneratia caseolaris<\/em> (1,000 plants\/ha) + Kandelia candel<\/em> (1,600 plants\/ha) and Sonneratia caseolaris<\/em> (1,000 plants\/ha) + Rhizophora mucronata<\/em> (1,600 plants\/ha). On both groups of sites (the groupings of difficult site and the groupings of favorable site), the results for the growth metrics of diameter, height, and canopy diameter were superior to those of the Sonneratia caseolaris<\/em>. When compared to the groupings of difficult site, the species planted on the groupings of favorable site displayed the highest and statistically significant outcomes in terms of growth characteristics. The mixed afforestation technique encourages plant development, quickly develops a two-story forest structure, and enhances the efficiency of the mangrove belt’s coastal protection.<\/p>\n

Keywords:<\/em> Mangrove trees, planting method, groups of sites, mangroves<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>N\u0102NG SU\u1ea4T V\u00c0 HI\u1ec6U QU\u1ea2 KINH T\u1ebe R\u1eeaNG TR\u1ed2NG KEO LAI\u00a0V\u00c0 B\u1ea0CH \u0110\u00c0N LAI TR\u00caN B\u1edc BAO T\u1ea0I KHU V\u1ef0C H\u00d2N \u0110\u1ea4T,\u00a0T\u1ec8NH KI\u00caN GIANG<\/p>\n

<\/a>Ng\u00f4 V\u0103n Ng\u1ecdc, Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t, Tr\u1ea7n Kh\u00e1nh Hi\u1ec7u, Nguy\u1ec5n Tr\u1ecdng Nam,
\nTr\u1ea7n V\u0103n Nho, L\u00ea Tri\u1ec7u Duy<\/p>\n

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

Nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 m\u1ed9t ph\u1ea7n k\u1ebft qu\u1ea3 c\u1ee7a d\u1ef1 \u00e1n \u201cS\u1ea3n xu\u1ea5t th\u1eed nghi\u1ec7m c\u00e1c gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt keo lai, Keo l\u00e1 tr\u00e0m, b\u1ea1ch \u0111\u00e0n lai c\u00f3 n\u0103ng su\u1ea5t cao \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn v\u00e0 tr\u1ed3ng tr\u00ean l\u00edp, b\u1edd bao t\u1ea1i v\u00f9ng T\u1ee9 gi\u00e1c Long Xuy\u00ean \u0111\u1ec3 cung c\u1ea5p nguy\u00ean li\u1ec7u cho ch\u1ebf bi\u1ebfn v\u00e1n nh\u00e2n t\u1ea1o\u201d. Th\u00ed nghi\u1ec7m m\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng cho lo\u00e0i keo lai (d\u00f2ng AH1) gi\u00e2m hom v\u00e0 b\u1ea1ch \u0111\u00e0n lai (d\u00f2ng UE24) nu\u00f4i c\u1ea5y m\u00f4 \u0111\u01b0\u1ee3c tr\u1ed3ng ri\u00eang r\u1ebd t\u1eeb th\u00e1ng 8 n\u0103m 2016 tr\u00ean b\u1edd bao t\u1ea1i kho\u1ea3nh 10, x\u00e3 B\u00ecnh S\u01a1n, huy\u1ec7n H\u00f2n \u0110\u1ea5t, t\u1ec9nh Ki\u00ean Giang thu\u1ed9c l\u00e2m ph\u1eadn c\u1ee7a C\u00f4ng ty C\u1ed5 ph\u1ea7n G\u1ed7 MDF-VRG Ki\u00ean Giang. C\u00f3 4 m\u1eadt \u0111\u1ed9 c\u00e2y tr\u1ed3ng \u0111\u01b0\u1ee3c th\u00ed nghi\u1ec7m: M1 = 1.250 c\u00e2y\/ha (c\u1ef1 ly: 1,5 \u00b4 2 m); M2 (2 \u00b4 2 m); M3 (2 \u00b4 3 m) v\u00e0 M4 (2 \u00b4 4 m). K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 l\u00fac 6 tu\u1ed5i cho th\u1ea5y: N\u0103ng su\u1ea5t keo lai cao nh\u1ea5t l\u00e0 m\u1eadt \u0111\u1ed9 3.333 c\u00e2y\/ha \u0111\u1ea1t \u2248 48,0 m3<\/sup>\/n\u0103m\/ha, m\u1eadt \u0111\u1ed9 2.500 c\u00e2y\/ha \u0111\u1ea1t 44,3 m3<\/sup>\/n\u0103m\/ha, m\u1eadt \u0111\u1ed9 1.667 c\u00e2y\/ha \u0111\u1ea1t \u2248 38,6 m3<\/sup>\/n\u0103m\/ha v\u00e0 m\u1eadt \u0111\u1ed9 1.250 c\u00e2y\/ha \u0111\u1ea1t 31,4 m3<\/sup>\/n\u0103m\/ha; n\u0103ng su\u1ea5t b\u1ea1ch \u0111\u00e0n lai cao nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 3.333 c\u00e2y\/ha \u0111\u1ea1t \u2248 51,4 m3<\/sup>\/n\u0103m\/ha, m\u1eadt \u0111\u1ed9 2.500 c\u00e2y\/ha \u0111\u1ea1t 49,3 m3<\/sup>\/n\u0103m\/ha, m\u1eadt \u0111\u1ed9 1.667 c\u00e2y\/ha \u0111\u1ea1t \u2248 41,7 m3<\/sup>\/n\u0103m\/ha v\u00e0 m\u1eadt \u0111\u1ed9 1.250 c\u00e2y\/ha \u0111\u1ea1t 36,8 m3<\/sup>\/n\u0103m\/ha. Sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t c\u1ee7a b\u1ea1ch \u0111\u00e0n lai c\u00f3 ph\u1ea7n cao h\u01a1n so v\u1edbi keo lai \u1edf c\u00f9ng m\u1eadt \u0111\u1ed9 tr\u1ed3ng v\u00e0 c\u1ea3 02 lo\u00e0i \u0111\u1ec1u r\u1ea5t ph\u00f9 h\u1ee3p cho tr\u1ed3ng r\u1eebng tr\u00ean b\u1edd bao \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 kinh t\u1ebf cho th\u1ea5y m\u1eadt \u0111\u1ed9 tr\u1ed3ng 2.500 c\u00e2y\/ha l\u00e0 t\u1ed1i \u01b0u cho hi\u1ec7u qu\u1ea3 kinh t\u1ebf t\u1ed1t nh\u1ea5t, c\u1ee5 th\u1ec3 l\u00e0: Keo lai m\u1eadt \u0111\u1ed9 2.500 c\u00e2y\/ha c\u00f3 NPV \u2248 55,0 tri\u1ec7u \u0111\u1ed3ng; IRR \u2248 33 % v\u00e0 BCR \u2248 2,8 l\u1ea7n; B\u1ea1ch \u0111\u00e0n lai m\u1eadt \u0111\u1ed9 2.500 c\u00e2y\/ha c\u00f3 NPV \u2248 54,9 tri\u1ec7u \u0111\u1ed3ng; IRR \u2248 32 % v\u00e0 BCR \u2248 2,7 l\u1ea7n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> N\u0103ng su\u1ea5t, hi\u1ec7u qu\u1ea3 kinh t\u1ebf keo lai v\u00e0 b\u1ea1ch \u0111\u00e0n lai, t\u1ec9nh Ki\u00ean Giang<\/td>\n<\/tr>\n

\n

<\/a>Productivity and economic efficiency of acacia hybrid and eucalyptus hybrid planting on the high embankment of acid sulphate soil at Hon Dat district, Kien Giang province<\/strong><\/p>\n

This study is part of the result of the project “Producing technically advanced varieties of acacia hybrid, Acacia auriculiformis <\/em>and eucalyptus hybrid which have been recognized planting on acid sulphate soil in Kien Giang province to provide raw materials for processing artificial boards\u201d. Planting density experiment for acacia hybrid (clone AH1) cutting seedlings and hybrid eucalyptus (clone UE24) seedling made by tisue cultured were established from August 2016 on the embankment of block 10, Binh Son commune, Hon Dat district, Kien Giang province belongs to the forest area of \u200b\u200bMDF VRG Kien Giang Joint Stock Company. There are 4 different planting densities were applied: M1 = 1,250 trees\/ha (1.5 \u00b4 2 m); M2 (2 \u00b4 2 m); M3 (2 \u00b4 3 m) and M4 (2 \u00b4 4 m). Evaluation results at 6 years old showed that: The highest yield of acacia hybrid is the density of 3,333 trees\/ha, reaching \u2248 48.0 m3<\/sup>\/year\/ha, the density of 2,500 trees\/ha reaching 44.3 m3<\/sup>\/year\/ha, the density of 2,500 trees\/ha reaching 44.3 m3<\/sup>\/year\/ha, density 1,667 trees\/ha reaching \u2248 38.6 m3<\/sup>\/year\/ha and density of 1,250 trees\/ha reaching 31.4 m3<\/sup>\/year\/ha; The highest yield of hybrid eucalyptus at density of 3,333 trees\/ha, reaching \u2248 51.4 m3<\/sup>\/year\/ha, the density of 2,500 trees\/ha reaching 49.3 m3<\/sup>\/year\/ha, the density of 1,667 trees\/ha reaching \u2248 41.07 m3<\/sup>\/year\/ha and the density of 1,250 trees\/ha reached 36.8 m3<\/sup>\/year\/ha. The growth and yield of hybrid Eucalyptus higher than that of acacia hybrid at the same planting density and both species are suitable for afforestation on the embankment in the study area. The results of economic efficiency analysis show that planting density of 2,500 trees\/ha is optimal for the best economic efficiency: Acacia hybrid with density of 2,500 trees\/ha has NPV \u2248 55.0 millions VND; IRR \u2248 33% and BCR \u2248 2.8 times; Eucalyptus hybrid density 2,500 trees\/ha with NPV \u2248 54.9 millions VND; IRR \u2248 32% and BCR \u2248 2.7 times.<\/p>\n

Keywords:<\/em> Productivity, economic efficiency acacia and eucaplyptus, Kien Giang province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

<\/a>M\u1ee8C \u0110\u1ed8 CH\u00caNH L\u1ec6CH \u1ea8M V\u00c0 S\u1ef0 PH\u00c1T TRI\u1ec2N KHUY\u1ebeT T\u1eacT\u00a0TRONG QU\u00c1 TR\u00ccNH S\u1ea4Y G\u1ed6 KEO TAI T\u01af\u1ee2NG (Acacia mangium <\/em>Willd.)<\/p>\n

<\/a>H\u00e0 Ti\u1ebfn M\u1ea1nh1<\/sup>, Ph\u1ea1m V\u0103n Ch\u01b0\u01a1ng2<\/sup>, B\u00f9i Duy Ng\u1ecdc1<\/sup>,
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng1<\/sup>, Tr\u1ea7n \u0110\u1ee9c Trung1<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p R\u1eebng
\n2 <\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch \u1ea9m v\u00e0 qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n khuy\u1ebft t\u1eadt g\u1ed7 Keo tai t\u01b0\u1ee3ng (Acacia mangium <\/em>Willd.) trong su\u1ed1t qu\u00e1 tr\u00ecnh s\u1ea5y quy chu\u1ea9n. Hai m\u1ebb s\u1ea5y c\u1ee9ng v\u1edbi d\u1ed1c s\u1ea5y U = 4,5 – 5,0 v\u00e0 m\u1ec1m v\u1edbi d\u1ed1c s\u1ea5y U = 2,0 – 2,5 \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00ed nghi\u1ec7m \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch \u1ea9m theo chi\u1ec1u d\u00e0y t\u1ea5m g\u1ed7 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p c\u1eaft l\u00e1t v\u00e0 di\u1ec5n bi\u1ebfn c\u00e1c khuy\u1ebft t\u1eadt n\u1ee9t m\u1eb7t, n\u1ee9t \u0111\u1ea7u, mo m\u00f3p, cong v\u00eanh b\u1eb1ng ti\u00eau chu\u1ea9n AS\/NZS 4787:2001 v\u00e0 AS 2082:2007 t\u1ea1i 4 th\u1eddi \u0111i\u1ec3m tr\u01b0\u1edbc s\u1ea5y, khi \u0111\u1ed9 \u1ea9m g\u1ed7 (MC) \u0111\u1ea1t 50%, 20% v\u00e0 sau s\u1ea5y. K\u1ebft qu\u1ea3 kh\u1ea3o s\u00e1t cho th\u1ea5y di\u1ec5n bi\u1ebfn ch\u00eanh l\u1ec7ch \u1ea9m c\u00f3 li\u00ean quan r\u00f5 r\u00e0ng \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c khuy\u1ebft t\u1eadt su\u1ed1t qu\u00e1 tr\u00ecnh s\u1ea5y v\u00e0 m\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch \u1ea9m c\u0169ng nh\u01b0 khuy\u1ebft t\u1eadt \u1edf hai m\u1ebb s\u1ea5y l\u00e0 kh\u00e1c nhau. S\u1ef1 gi\u1ea3m \u1ea9m \u1edf l\u1edbp b\u1ec1 m\u1eb7t t\u1ea5m g\u1ed7 trong m\u1ebb s\u1ea5y c\u1ee9ng nhanh h\u01a1n v\u00e0 nhanh ch\u00f3ng xu\u1ed1ng d\u01b0\u1edbi \u0111i\u1ec3m b\u00e3o h\u00f2a th\u1edb g\u1ed7 (FSP) trong giai \u0111o\u1ea1n t\u1eeb khi b\u1eaft \u0111\u1ea7u s\u1ea5y v\u1ec1 MC 50% l\u00e0m cho ch\u00eanh l\u1ec7ch \u1ea9m gi\u1eefa t\u00e2m v\u00e0 b\u1ec1 m\u1eb7t (cao nh\u1ea5t 140%) l\u00e0 l\u1edbn h\u01a1n so v\u1edbi m\u1ebb s\u1ea5y m\u1ec1m (cao nh\u1ea5t 100%). \u0110\u00e2y l\u00e0 nguy\u00ean nh\u00e2n khi\u1ebfn khuy\u1ebft t\u1eadt n\u1ee9t m\u1eb7t, n\u1ee9t \u0111\u1ea7u, mo m\u00f3p, cong v\u00eanh \u1edf m\u1ebb s\u1ea5y c\u1ee9ng c\u00f3 m\u1ee9c \u0111\u1ed9 l\u1edbn h\u01a1n v\u00e0 nhi\u1ec1u h\u01a1n so v\u1edbi m\u1ebb s\u1ea5y m\u1ec1m. M\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch \u1ea9m c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m khi ti\u1ebfp t\u1ee5c s\u1ea5y do l\u1edbp b\u1ec1 m\u1eb7t \u0111\u00e3 b\u1eaft \u0111\u1ea7u kh\u00f4 ch\u1eadm l\u1ea1i v\u00e0 l\u1edbp ph\u00eda trong ti\u1ebfp t\u1ee5c kh\u00f4 v\u00e0 khi k\u1ebft th\u00fac \u0111\u1ea1t 24% v\u00e0 14% l\u1ea7n l\u01b0\u1ee3t \u1edf m\u1ebb s\u1ea5y c\u1ee9ng v\u00e0 m\u1ebb s\u1ea5y m\u1ec1m. \u0110\u00e2y l\u00e0 l\u00fd do l\u00e0m c\u00e1c v\u1ebft n\u1ee9t c\u00f3 xu h\u01b0\u1edbng \u0111\u00f3ng d\u1ea7n l\u1ea1i. M\u1ee9c \u0111\u1ed9 mo m\u00f3p \u1edf m\u1ebb s\u1ea5y c\u1ee9ng (4-6 mm) l\u1edbn h\u01a1n nhi\u1ec1u \u1edf m\u1ebb s\u1ea5y m\u1ec1m (trong kho\u1ea3ng 0,5 mm) l\u00e0m cho c\u1ea5p ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 s\u1ea5y \u1edf m\u1ebb s\u1ea5y c\u1ee9ng ph\u00e2n theo ti\u00eau ch\u00ed n\u00e0y \u0111\u1ea1t m\u1ee9c th\u1ea5p (lo\u1ea1i E theo AS\/NZS 4787:2001). S\u1ef1 ph\u00e1t tri\u1ec3n cong v\u00eanh \u1edf m\u1ebb s\u1ea5y m\u1ec1m h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 nh\u01b0ng \u1edf m\u1ebb s\u1ea5y c\u1ee9ng, xu h\u01b0\u1edbng t\u0103ng cong v\u00eanh xu\u1ea5t hi\u1ec7n su\u1ed1t qu\u00e1 tr\u00ecnh s\u1ea5y (chi\u1ec1u cao cong v\u00eanh t\u0103ng l\u00ean 2-3 mm khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh s\u1ea5y). M\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch \u1ea9m c\u1ee7a m\u1ebb s\u1ea5y c\u1ee9ng lu\u00f4n cao h\u01a1n m\u1ebb s\u1ea5y m\u1ec1m \u1edf c\u1ea3 4 th\u1eddi \u0111i\u1ec3m ki\u1ec3m tra l\u00e0 nguy\u00ean nh\u00e2n c\u1ee7a m\u1ee9c \u0111\u1ed9 khuy\u1ebft t\u1eadt g\u1ed7 s\u1ea5y \u1edf m\u1ebb s\u1ea5y c\u1ee9ng lu\u00f4n cao h\u01a1n m\u1ebb s\u1ea5y m\u1ec1m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> M\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch \u1ea9m, s\u1ef1 ph\u00e1t tri\u1ec3n khuy\u1ebft t\u1eadt g\u1ed7 s\u1ea5y, Keo tai t\u01b0\u1ee3ng<\/td>\n<\/tr>\n

\n

<\/a>Moisture content gradient and defect development of Acacia mangium <\/em>Willd. during drying process<\/strong><\/p>\n

This study investigated the moisture content gradient and the defect development of Acacia mangium<\/em> Willd. during the conventional drying. Two batches of fast drying with drying gradient U = 4.5 – 5.0 and slow drying with drying gradient U = 2.0 – 2.5 were conducted to determine the moisture content gradient according to timber thickness by the ovendry slicing method and the defect development by AS\/NZS 4787:2001 and AS 2082:2007 at before drying, MC of 50%, MC of 20% and after drying. The results showed that the moisture content gradient had a significant correlation to the defects development during drying process and their values were different in the two drying batches. The moisture decrease in the surface layer of the timber in the fast drying batch is faster and rapidly below the fibre saturation point (FSP) in the period from the start of drying to MC of 50%, causing the moisture difference between the core and the surface (highest 140%) was larger than that in the slow drying batch (highest 100%). This was the reason why the degree of surface check, end check, collapse and distortion in the fast drying batch are higher and more frequent than that in the slow drying batch. The moisture content gradient tended to decrease with continued drying as the surface layer started to dry slowly and the core layer continued to dry fastly and reached 24% and 14% respectively in the fast and slow drying batches at the end. Therefore, the checks tend to gradually close. The degree of collapse in the fast drying batch (4-6 mm) was much greater than that in the slow drying batch (within 0.5 mm), making the quality grade of the dried wood in the fast drying batch reached a low level (grade E according to AS\/NZS 4787:2001). The distortion development was almost absent in the slow drying batch, but was a tendency to increase during the fast drying batch (warping height increased by 2-3 mm at the end of drying). The moisture content gradient in the fast drying batch was always higher than that in the slow drying batch at all 4 test times, which led to the degree of wood defects in the fast drying batch were always larger than those in the slow drying batch.<\/p>\n

Keywords:<\/em> Acacia mangium <\/em>Willd., defect development, moisture content gradient<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>K\u1ebeT QU\u1ea2 \u0110\u00c1NH GI\u00c1 HI\u1ec6N TR\u1ea0NG G\u1ed6 KH\u1ea2O C\u1ed4 KHAI QU\u1eacT\u00a0T\u1ea0I KINH \u0110\u00d4 HOA L\u01af, NINH B\u00ccNH<\/p>\n

<\/a>Nguy\u1ec5n \u0110\u1ee9c Th\u00e0nh1<\/sup>, Nguy\u1ec5n T\u1eed Kim1<\/sup>, Ho\u00e0ng Trung Hi\u1ebfu1<\/sup>, Nguy\u1ec5n Ng\u1ecdc Qu\u00fd2<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2 <\/sup>Vi\u1ec7n Kh\u1ea3o c\u1ed5 h\u1ecdc<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh c\u00e1c lo\u00e0i g\u1ed7 v\u00e0 \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng h\u01b0 h\u1ea1i g\u1ed7 kh\u1ea3o c\u1ed5 khai qu\u1eadt t\u1ea1i Khu di t\u00edch C\u1ed1 \u0111\u00f4 Hoa L\u01b0, Ninh B\u00ecnh \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh trong n\u0103m 2021. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u 05 m\u1eabu g\u1ed7 kh\u1ea3o c\u1ed5 cho th\u1ea5y s\u1ef1 \u0111a d\u1ea1ng v\u1ec1 lo\u00e0i g\u1ed7 v\u00e0 m\u1ee9c \u0111\u1ed9 h\u01b0 h\u1ea1i c\u1ee7a c\u00e1c m\u1eabu n\u00e0y. D\u00f9 ch\u1ec9 nghi\u00ean c\u1ee9u 5 m\u1eabu g\u1ed7 kh\u1ea3o c\u1ed5 nh\u01b0ng \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 04 lo\u00e0i g\u1ed7 g\u1ed3m: Ch\u1eb7c kh\u1ebf (Dysoxylum<\/em> sp.), C\u1ed3ng (Calophyllum <\/em>sp.), Tr\u01b0\u1eddng (Pometia <\/em>sp.) v\u00e0 T\u00e1u (Vatica tonkinensis<\/em> A. Chev.). K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 h\u01b0 h\u1ea1i cho th\u1ea5y 5 m\u1eabu g\u1ed7 \u0111\u01b0\u1ee3c chia th\u00e0nh 3 nh\u00f3m m\u1ee9c \u0111\u1ed9 h\u01b0 h\u1ea1i. G\u1ed7 Ch\u1eb7c kh\u1ebf b\u1ecb h\u01b0 h\u1ea1i n\u1eb7ng, g\u1ed7 C\u1ed3ng b\u1ecb h\u01b0 h\u1ea1i trung b\u00ecnh. Trong khi \u0111\u00f3, g\u1ed7 Tr\u01b0\u1eddng v\u00e0 T\u00e1u ch\u1ec9 b\u1ecb h\u01b0 h\u1ea1i nh\u1eb9. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 x\u00e2y d\u1ef1ng quy tr\u00ecnh x\u1eed l\u00fd b\u1ea3o t\u1ed3n l\u00e2u d\u00e0i cho t\u1eebng lo\u00e0i g\u1ed7 theo c\u00e1c c\u1ea5p \u0111\u1ed9 h\u01b0 h\u1ea1i c\u1ee7a hi\u1ec7n v\u1eadt g\u1ed7.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> G\u1ed7 kh\u1ea3o c\u1ed5 ng\u1eadp n\u01b0\u1edbc, kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, \u0111\u1ed9 \u1ea9m, ph\u00e1 h\u1ee7y, x\u1eed l\u00fd b\u1ea3o t\u1ed3n<\/td>\n<\/tr>\n

\n

<\/a>Evaluation of deterioration status of historical wood excavated at Hoa Lu ancient Capital, Ninh Binh<\/strong><\/p>\n

In this article, the evaluation of deterioration stage of five archaeological waterlogged woods excavated at Hoa Lu ancient relic site, Ninh Binh in 2021. The results of wood species identification and assessement of the current detertioration status showed the diversity of wood species and the degree of damage. The classification results showed that there are 04 species: Chac Khe (Dysoxylum<\/em> sp.), Cong (Calophyllum <\/em>sp.), Truong (Pometia <\/em>sp.) and Tau (Vatica tonkinensis<\/em> A. Chev.). The destruction assessment results showed that 5 wood samples were divided into 3 groups of deterioration. The Chac khe was under heavily damaged while the Cong was moderately deteriorated. The Truong and Tau were only slightly decomposed. The research results provided the basis for future establishing a long-term conservation treatment process for each type and derterioration degree of historical woods.<\/p>\n

Keywords:<\/em> Archaeological waterlogged wood, basic density, moisture, deterioration, conservation treatment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>QU\u00c1 TR\u00ccNH H\u00ccNH TH\u00c0NH V\u00c0 PH\u00c1T TRI\u1ec2N C\u1ee6A C\u00d4NG NGH\u1ec6,\u00a0\u1ee8NG D\u1ee4NG TRE \u00c9P KH\u1ed0I TRONG \u0110\u1edcI S\u1ed0NG<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, \u0110\u1ed7 Th\u1ecb Ho\u00e0i Thanh<\/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<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Tre \u00e9p kh\u1ed1i \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh t\u1eeb nh\u1eefng n\u0103m cu\u1ed1i th\u1eadp ni\u00ean 90 c\u1ee7a th\u1ebf k\u1ef7 tr\u01b0\u1edbc, sau 4 th\u1eadp k\u1ef7 h\u00ecnh th\u00e0nh v\u00e0 ph\u00e1t tri\u1ec3n, tre \u00e9p kh\u1ed1i \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u, s\u1ea3n xu\u1ea5t v\u00e0 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i tr\u00ean th\u1ecb th\u01b0\u1eddng hi\u1ec7n nay. Tre \u00e9p kh\u1ed1i d\u1ef1a theo s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c chia l\u00e0m 3 lo\u1ea1i s\u1ea3n ph\u1ea9m ch\u00ednh l\u00e0 tre \u00e9p kh\u1ed1i v\u1eadt li\u1ec7u n\u1ed9i th\u1ea5t, tre \u00e9p kh\u1ed1i v\u1eadt li\u1ec7u ngo\u1ea1i th\u1ea5t v\u00e0 tre \u00e9p kh\u1ed1i v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng. V\u1edbi m\u1ed7i lo\u1ea1i s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t kh\u00e1c nhau. D\u1ef1a theo \u0111\u1eb7c \u0111i\u1ec3m k\u00edch th\u01b0\u1edbc v\u00e0 c\u00f4ng ngh\u1ec7, tre \u00e9p kh\u1ed1i \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb 2 c\u00f4ng ngh\u1ec7 ch\u00ednh l\u00e0 tre \u00e9p kh\u1ed1i ngu\u1ed9i v\u00e0 tre \u00e9p kh\u1ed1i n\u00f3ng. M\u1ed7i lo\u1ea1i h\u00ecnh c\u00f4ng ngh\u1ec7, t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m kh\u00e1c nhau v\u00e0 th\u00edch \u1ee9ng v\u1edbi m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng kh\u00e1c bi\u1ec7t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> V\u1eadt li\u1ec7u n\u1ed9i th\u1ea5t, v\u1eadt li\u1ec7u ngo\u1ea1i th\u1ea5t, v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng, tre \u00e9p kh\u1ed1i<\/td>\n<\/tr>\n

\n

<\/a>Formation and development of bamboo scrimber in life<\/strong><\/p>\n

The bamboo scrimber was produced in the 90s of the last century. After 4 decades of formation and development, bamboo scrimber has been researched, produced, and widely applied on the market nowadays. Based on products, bamboo scrimber is divided into 3 main product categories: bamboo scrimber for interior materials, bamboo scrimber for exterior and building materials. Each type of product has different production technology. Based on technology and characteristics of size, bamboo scrimber is produced by 2 main technologies\/processes: cold-pressing and hot-pressing bamboo scrimber. Each type of technology creates products with different advantages and disadvantages and applicate to different uses.<\/p>\n

Keywords:<\/em> Interior materials, exterior materials, building materials, bamboo scrimber<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

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

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 5 – 2022 1. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng Sa nh\u00e2n t\u00edm (Amomum longiligulare T.L.Wu) t\u1eeb h\u1ea1t t\u1ea1i t\u1ec9nh\u00a0S\u01a1n La Results of production by seed and growth Amomum longiligulare T.L.Wu\u00a0in the narratory stage\u00a0in Son La Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc Tr\u1ea7n Anh Tu\u1ea5n Nguy\u1ec5n V\u0169 Giang \u0110a Ly […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24,45],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2326"}],"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=2326"}],"version-history":[{"count":6,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2326\/revisions"}],"predecessor-version":[{"id":2333,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2326\/revisions\/2333"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}