{"id":1461,"date":"2015-08-03T14:42:48","date_gmt":"2015-08-03T07:42:48","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1461"},"modified":"2023-11-23T12:25:58","modified_gmt":"2023-11-23T05:25:58","slug":"vietnam-journal-of-forest-science-number-2-2015","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2015\/08\/vietnam-journal-of-forest-science-number-2-2015\/","title":{"rendered":"Vietnam Journal of Forest Science Number 2-2015"},"content":{"rendered":"

\u00a0\"Bia<\/a>\u00a0<\/b><\/p>\n

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 2 – 2015<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00a01.<\/td>\n\u0110a d\u1ea1ng lo\u00e0i v\u00e0 chi h\u1ecd g\u1eebng \u1edf x\u00e3 B\u00ecnh Chu\u1ea9n, Nga My v\u00e0 Xi\u1ec1ng My thu\u1ed9c Khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean P\u00f9 Hu\u1ed1ng, Ngh\u1ec7 An<\/td>\nV\u00f5 Minh S\u01a1n, Ph\u1ea1m H\u1ed3ng Ban, L\u00ea Th\u1ecb H\u01b0\u01a1ng<\/td>\nSpecies and genus diversity of Zingiberaceae from Binh Chuan, Nga My, Xieng My communes in Pu Huong Nature Reserve, Nghe An province<\/td>\n3769<\/td>\n<\/tr>\n
2.<\/td>\n\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng, sinh tr\u01b0\u1edfng v\u00e0 sinh kh\u1ed1i c\u1ee7a c\u00e1c d\u00f2ng Keo l\u00e1 li\u1ec1m (Acacia crassicarpa<\/i>) tr\u1ed3ng tr\u00ean v\u00f9ng \u0111\u1ea5t c\u00e1t ven bi\u1ec3n Nam Trung B\u1ed9<\/td>\n\u0110\u1eb7ng Th\u00e1i D\u01b0\u01a1ng<\/td>\nThe adaptation, growth and biomass of the varieties of Acacia crassicara <\/i>planted on the Centrial Southern Coastal and sandy areas<\/td>\n3775<\/td>\n<\/tr>\n
3.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng c\u1ee7a M\u00e2y n\u1ebfp K83 (Calamus tetradactylus <\/i>Hance) trong c\u00e1c m\u00f4 h\u00ecnh d\u1ef1 \u00e1n khuy\u1ebfn n\u00f4ng t\u1ea1i v\u00f9ng \u0111\u1ec7m V\u01b0\u1eddn Qu\u1ed1c gia Ba V\u00ec<\/td>\nL\u1ea1i Thanh H\u1ea3i, Tr\u1ea7n Anh H\u1ea3i, Ph\u1ea1m \u0110\u00ecnh S\u00e2m<\/td>\nExamine the growth ability of Calamus tetradactylus <\/i>Hance (K83 clone) in the models of agricultural extension project in buffer zone of a Vi National Park<\/td>\n3784<\/td>\n<\/tr>\n
4.<\/td>\nNghi\u00ean c\u1ee9u ph\u00e2n nh\u00f3m lo\u00e0i theo m\u1ed9t s\u1ed1 \u0111\u1eb7c tr\u01b0ng sinh tr\u01b0\u1edfng ph\u1ee5c v\u1ee5 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh theo nh\u00f3m lo\u00e0i cho 4 khu r\u1eebng \u0111\u1eb7c d\u1ee5ng thu\u1ed9c mi\u1ec1n B\u1eafc Vi\u1ec7t Nam<\/td>\nNguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n, Tr\u1ea7n V\u0103n Con, Tr\u1ea7n Th\u1ecb Thu H\u00e0<\/td>\nStudying grouping species according to some growth characteristics to construct diameter growth models for four special-use forest regions in Northern Vietnam<\/td>\n3795<\/td>\n<\/tr>\n
5.<\/td>\nM\u1ed1i quan h\u1ec7 c\u1ee7a Thanh th\u1ea5t (Ailanthus triphysa <\/i>(Dennst) Alston) v\u1edbi c\u00e1c lo\u00e0i trong r\u1eebng t\u1ef1 nhi\u00ean \u1edf 3 v\u00f9ng sinh th\u00e1i tr\u1ecdng \u0111i\u1ec3m<\/td>\nPh\u1ea1m V\u0103n B\u1ed1n, Ph\u1ea1m Th\u1ebf D\u0169ng, Nguy\u1ec5n V\u0103n Thi\u1ebft<\/td>\nRelationship between Ailanthus triphysa <\/i>(Dennst) Alston and other species in three main ecological regions in Vietnam<\/td>\n3808<\/td>\n<\/tr>\n
6.<\/td>\nNghi\u00ean c\u1ee9u t\u1ed5ng sinh kh\u1ed1i r\u1ec5 c\u00e1m s\u1ea3n sinh h\u00e0ng n\u0103m cho r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh t\u1ea1i Khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Copia<\/td>\nTr\u1ea7n V\u0103n \u0110\u00f4, Nguy\u1ec5n To\u00e0n Th\u1eafng, \u0110\u1eb7ng V\u0103n Thuy\u1ebft, Tr\u1ea7n Quang Trung, Tr\u1ea7n Ho\u00e0ng Qu\u00fd, Nguy\u1ec5n Th\u1ecb Thu Ph\u01b0\u01a1ng, B\u00f9i H\u1eefu Th\u01b0\u1edfng<\/td>\nFine root production estimation for natural evergreen broadleaved forests in Copia Natural Reserve, Vietnam<\/td>\n3814<\/td>\n<\/tr>\n
7.<\/td>\nK\u1ebft qu\u1ea3 ph\u00e2n t\u00edch c\u00e1c nh\u00f3m ch\u1ea5t Polysaccarit, axit b\u00e9o, alkaloid trong qu\u1ea3 \u01af\u01a1i t\u1ea1i c\u00e1c v\u00f9ng nghi\u00ean c\u1ee9u<\/td>\n\u0110o\u00e0n \u0110\u00ecnh Tam, L\u00ea Qu\u1ed1c Huy, V\u0169 Qu\u00fd \u0110\u00f4ng<\/td>\nResults of analysis about substances group Polysaccharide, fatty acid, Alkaloid in Scaphium macropodum fruits at regions research<\/td>\n3821<\/td>\n<\/tr>\n
8.<\/td>\nT\u00ecnh h\u00ecnh g\u00e2y tr\u1ed3ng v\u00e0 s\u1eed d\u1ee5ng c\u00e2y C\u00f3c h\u00e0nh \u1edf c\u00e1c t\u1ec9nh Ninh Thu\u1eadn v\u00e0 B\u00ecnh Thu\u1eadn<\/td>\nH\u00e0 Th\u1ecb M\u1eebng, \u0110inh Thanh Giang, Ph\u00f9ng V\u0103n Khen, V\u0169 Ng\u1ecdc H\u00e0<\/td>\nPlanting and use of Azadirachta excelsa in Ninh Thuan and Binh Thuan provinces<\/td>\n3831<\/td>\n<\/tr>\n
9.<\/td>\nPh\u00e2n l\u1eadp, tuy\u1ec3n ch\u1ecdn vi khu\u1ea9n ph\u00e2n gi\u1ea3i xenlulo s\u1ea3n xu\u1ea5t ph\u00e2n h\u1eefu c\u01a1 sinh h\u1ecdc<\/td>\nNguy\u1ec5n Th\u1ecb Thu\u00fd Nga, Ph\u1ea1m Quang Nam, L\u00ea Xu\u00e2n Ph\u00fac, Ph\u1ea1m Quang Thu, Nguy\u1ec5n Minh Ch\u00ed<\/td>\nIsolating and screening cellulolytic microorganisms to produce organic biofertilizer<\/td>\n3841<\/td>\n<\/tr>\n
10.<\/td>\nThay \u0111\u1ed5i t\u00ednh ch\u1ea5t \u0111\u1ea5t d\u01b0\u1edbi r\u1eebng tr\u1ed3ng Cao su tr\u00ean \u0111\u1ea5t d\u1ed1c t\u1ea1i H\u01b0\u01a1ng Kh\u00ea – H\u00e0 T\u0129nh, Vi\u1ec7t Nam<\/td>\nL\u00ea B\u00e1 Th\u01b0\u1edfng, Ph\u1ea1m V\u0103n \u0110i\u1ec3n, \u0110\u1ed7 Anh Tu\u00e2n<\/td>\nChanges of soil properties induced by rubber (Hevea brasiliensis) plantation establishment: A case study in Huong Khe, Ha Tinh, Vietnam<\/td>\n3851<\/td>\n<\/tr>\n
11.<\/td>\nK\u1ebft qu\u1ea3 t\u00ednh to\u00e1n b\u1ea3o \u00f4n v\u1ecf l\u00f2 s\u1ea5y g\u1ed7 nhi\u1ec7t \u0111\u1ed9 cao<\/td>\nNguy\u1ec5n C\u1ea3nh M\u00e3o, B\u00f9i Duy Ng\u1ecdc<\/td>\nResults on cacultion of heat insulation of outer casing of high temperature drying oven<\/td>\n3858<\/td>\n<\/tr>\n
12.<\/td>\nX\u00e2y d\u1ef1ng n\u00f4ng th\u00f4n m\u1edbi – G\u00f3c nh\u00ecn t\u1eeb vai tr\u00f2 c\u1ee7a ph\u1ee5 n\u1eef Nam \u0110\u1ecbnh trong ph\u00e1t tri\u1ec3n kinh t\u1ebf<\/td>\nL\u00ea Th\u1ecb Tuy\u1ebft Anh, Nguy\u1ec5n Th\u1ecb Xuy\u1ebfn<\/td>\nThe reform rural construction – the observation from Nam Dinh women\u2019s roles in economic development<\/td>\n3862<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

1. \u0110A D\u1ea0NG LO\u00c0I V\u00c0 CHI H\u1ecc G\u1eeaNG \u1ede X\u00c3 B\u00ccNH CHU\u1ea8N, NGA MY V\u00c0 XI\u1ec0NG MY THU\u1ed8C KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN P\u00d9 HU\u1ed0NG, NGH\u1ec6 AN<\/b><\/p>\n

V\u00f5 Minh S\u01a1n, Ph\u1ea1m H\u1ed3ng Ban, L\u00ea Th\u1ecb H\u01b0\u01a1ng* <\/b><\/p>\n

Khoa Sinh h\u1ecdc, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Vinh<\/i><\/p>\n\n\n\n\n
K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u h\u1ecd G\u1eebng (Zingiberaceae) \u1edf x\u00e3 B\u00ecnh Chu\u1ea9n, Nga My, Xi\u1ec1ng My thu\u1ed9c khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean (BTTN) P\u00f9 Hu\u1ed1ng (Ngh\u1ec7 An), \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 42 lo\u00e0i, 10 chi, trong \u0111\u00f3 5 chi v\u00e0 31 lo\u00e0i b\u1ed5 sung cho danh l\u1ee5c P\u00f9 Hu\u1ed1ng c\u00f4ng b\u1ed1 n\u0103m 2011. C\u00e1c chi \u0111a d\u1ea1ng nh\u1ea5t t\u1ea1i khu v\u1ef1c nghi\u00ean c\u1ee9u l\u00e0 Alpinia <\/i>(12 lo\u00e0i), Zingiber <\/i>(8 lo\u00e0i), Amomum <\/i>(7 lo\u00e0i). C\u00e1c lo\u00e0i h\u1ecd G\u1eebng s\u1ed1ng ch\u1ee7 y\u1ebfu \u1edf d\u01b0\u1edbi t\u00e1n r\u1eebng, r\u1eebng th\u1ee9 sinh, ven su\u1ed1i, tr\u1ea3ng c\u00e2y b\u1ee5i, r\u1eebng nguy\u00ean sinh. S\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt c\u00f3 gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng c\u1ee7a h\u1ecd G\u1eebng nh\u01b0 sau: cho tinh d\u1ea7u v\u1edbi 28 lo\u00e0i, l\u00e0m thu\u1ed1c v\u1edbi 26 lo\u00e0i, l\u00e0m gia v\u1ecb v\u1edbi 11 lo\u00e0i v\u00e0 \u0103n \u0111\u01b0\u1ee3c v\u1edbi 7 lo\u00e0i. H\u1ecd G\u1eebng \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u c\u00f3 3 y\u1ebfu t\u1ed1 \u0111\u1ecba l\u00fd, y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1edbi chi\u1ebfm 64,29%; y\u1ebfu t\u1ed1 \u00f4n \u0111\u1edbi chi\u1ebfm 2,38%, y\u1ebfu t\u1ed1 \u0111\u1eb7c h\u1eefu v\u00e0 c\u1eadn \u0111\u1eb7c h\u1eefu chi\u1ebfm 30,95%.T\u1eeb kh\u00f3a: <\/i><\/b>H\u1ecd G\u1eebng, Khu B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean P\u00f9 Hu\u1ed1ng, B\u00ecnh Chu\u1ea9n, Nga My, Xi\u1ec1ng My<\/td>\n<\/tr>\n
\n

Species and genus diversity of Zingiberaceae from Binh Chuan, Nga My, Xieng My communes in Pu Huong Nature Reserve, Nghe An province<\/b><\/p>\n

This paper presents some results of research on family Zingiberaceae in Binh Chuan, Nga My and Xieng My communes of Pu Huong Nature Reserve, Nghe An province, from 2014 to 2015. Total 42 species belonging to 10 genus of Zingiberaceae were collected and identified. There were 5 genera and 31 species found as new records for the plant list of Pu Huong Nature Reserve published in 2011. Alpinia <\/i>was the richest genus (12 species), then followed by Zingiber <\/i>(8 species), Amomum <\/i>(7) and other genera (1 to 4 species). The Zingiberaceae species lives mainly in under the forest canopy, secondary forests, along streams, scrub and primary forest. The number of useful plant species of the Zingiberaceae is categorized as follows: 28 species supply essential oil, 26 species as medicinal plants, 11 species for spice and 7 species for edible. The Zingiberaceae in Binh Chuan, Nga My and Xieng My communes of Pu Huong Nature Reserve are mainly comprised of the tropical element (64.29%), endemic element (30.95%) and temperate element (2.38%).<\/p>\n

Keywords: <\/i><\/b>Zingiberaceae, Pu Huong Nature Reseve, Binh Chuan, Nga My, Xieng My.<\/p>\n

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

2. \u0110\u00c1NH GI\u00c1 KH\u1ea2 N\u0102NG TH\u00cdCH \u1ee8NG, SINH TR\u01af\u1edeNG V\u00c0 SINH KH\u1ed0I C\u1ee6A C\u00c1C D\u00d2NG KEO L\u00c1 LI\u1ec0M (Acacia crassicarpa<\/i>) TR\u1ed2NG TR\u00caN V\u00d9NG \u0110\u1ea4T C\u00c1T VEN BI\u1ec2N NAM TRUNG B\u1ed8<\/b><\/p>\n

\u0110\u1eb7ng Th\u00e1i D\u01b0\u01a1ng<\/b><\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m – Hu\u1ebf<\/i><\/p>\n

V\u00f9ng \u0111\u1ea5t c\u00e1t ven bi\u1ec3n Nam Trung B\u1ed9 c\u00f3 di\u1ec7n t\u00edch 264.981ha, chi\u1ebfm t\u1ef7 l\u1ec7 kh\u00e1 l\u1edbn so v\u1edbi di\u1ec7n t\u00edch t\u1ef1 nhi\u00ean c\u1ee7a khu v\u1ef1c . \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a v\u00f9ng n\u00e0y l\u00e0 kh\u00f4 n\u00f3ng , \u0111\u00e2\u0301 t ngh\u00e8o dinh d\u01b0\u01a1\u0303 ng v\u00e0 th\u01b0\u1eddng xuy\u00ean ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u00e3o bi\u1ec3n v\u00e0 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu. Vi\u1ec7c \u0111\u00e1nh gi\u00e1 t\u00ednh th\u00edch \u1ee9ng, sinh tr\u01b0\u1edfng, sinh kh\u1ed1i \u0111\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c lo\u00e0i c\u00e2y, d\u00f2ng c\u00e2y tr\u1ed3ng cho khu v\u1ef1c n\u00e0y l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. Nghi\u00ean c\u1ee9u \u0111\u00e3 tr\u1ed3ng kh\u1ea3o nghi\u1ec7m 9 d\u00f2ng Keo l\u00e1 li\u1ec1m (Acacia crassicarpa) <\/i>v\u00e0 1 d\u00f2ng \u0111\u1ed1i ch\u1ee9ng. Nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 c\u00e1c ch\u1ec9 ti\u00eau: t\u1ef7 l\u1ec7 s\u1ed1ng, sinh tr\u01b0\u1edfng v\u00e0 sinh kh\u1ed1i c\u1ee7a c\u00e1c d\u00f2ng Keo l\u00e1 li\u1ec1m \u1edf giai \u0111o\u1ea1n r\u1eebng tr\u1ed3ng 16 th\u00e1ng tu\u1ed5i. S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n 2 t <\/i>\uf063, ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai 1 nh\u00e2n t\u1ed1 v\u00e0 ph\u00e2n t\u00edch Duncan \u0111\u1ec3 so s\u00e1nh v\u00e0 ch\u1ecdn d\u00f2ng t\u1ed1t nh\u1ea5t. K\u1ebft qu\u1ea3 \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 1 d\u00f2ng Keo l\u00e1 li\u1ec1m t\u1ed1t nh\u1ea5t \u0111\u1ec3 tr\u1ed3ng tr\u00ean v\u00f9ng \u0111\u1ea5t c\u00e1t n\u1ed9i \u0111\u1ed3ng c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi \u0111\u1ed1i ch\u1ee9ng 19,99%. D\u00f2ng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn n\u1eb1m trong nh\u00f3m tr\u1ed9i nh\u1ea5t v\u00e0 c\u00f3 s\u1ef1 kh\u00e1c nhau r\u00f5 r\u1ec7t v\u1ec1 t\u1ef7 l\u1ec7 s\u1ed1ng, sinh tr\u01b0\u1edfng v\u00e0 sinh kh\u1ed1i so v\u1edbi c\u00e1c d\u00f2ng kh\u00e1c. V\u00f9ng \u0111\u1ea5t c\u00e1t ven bi\u1ec3n ch\u1ecdn \u0111\u01b0\u1ee3c d\u00f2ng A.Cr.N.147 v\u1edbi \u0111\u1ed9 v\u01b0\u1ee3t sinh kh\u1ed1i so v\u1edbi \u0111\u1ed1i ch\u1ee9ng l\u00e0 20,8%.<\/p>\n

T\u1eeb kho\u00e1: <\/i><\/b>Keo l\u00e1 li\u1ec1m, Nam Trung B\u1ed9, sinh kh\u1ed1i, sinh tr\u01b0\u1edfng, th\u00edch \u1ee9ng, v\u00f9ng \u0111\u1ea5t c\u00e1t.<\/p>\n

\u00a0<\/i><\/p>\n

The adaptation, growth and biomass of the varieties of <\/b>Acacia crassicara <\/i><\/b>planted on the Central Southern coastal and sandy areas<\/b><\/p>\n

With the area of 264.981ha, the Central Southern coastal and sandy areas occupy a large share of the natural area of the region. The primary characteristics of this region are dry, hot, poor soil with intense impacts of ocean typhoons and climate change. It is important to evaluate the adaptation capability, growth, biomass to select the suitable tree species for the region. This study experimentally planted 9 varieties of the Acacia Crassicarpa, <\/i>and the control one. We evaluated the survival rate, growth rate and biomass of these varieties at the 16 month olds plantation. We use standard 2 t <\/i>\uf063 , one factor variance analysis and Duncan analysis to compare and select the most suitable variety. The result identified one variety with highest growth rate, biomass and survival rate planting on the in-land Central Southern coastal region with the prominent level of 19,9% over the control. For the coastal area, the most suitable variety A.Cr.N.147 with the prominent level of 20,8% over the control.<\/p>\n

Key words: <\/i><\/b>Acacia crassicarpa<\/i>, Southern Central, biomass, growth, adaptability, coastal<\/p>\n

 <\/p>\n

3. \u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG C\u1ee6A M\u00c5Y N\u1ebeP K83 (Calamus tetradactylus <\/i>Hance) TRONG C\u00c1C M\u00d4 H\u00ccNH D\u1ef0 \u00c1N KHUY\u1ebeN N\u00d4NG T\u1ea0I V\u00d9NG \u0110\u1ec6M V\u01af\u1edcN QU\u1ed0C GIA BA V\u00cc<\/b><\/p>\n

L\u1ea1i Thanh H\u1ea3i, Tr\u1ea7n Anh H\u1ea3i, Ph\u1ea1m \u0110i\u0300nh S\u00e2m <\/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\u1ef7 l\u1ec7 s\u1ed1ng b\u00ecnh qu\u00e2n c\u1ee7a M\u00e2y n\u1ebfp K83 trong c\u00e1c m\u00f4 h\u00ecnh th\u1eed nghi\u1ec7m t\u1ea1i 3 x\u00e3 vu\u0300ng \u0111\u00ea\u0323m V\u01b0\u01a1\u0300n qu\u00f4\u0301c gia Ba Vi\u0300 \u0111\u1ec1u cao t\u1eeb 95,3 \u0111\u1ebfn 97,1%. M\u00e2y n\u1ebfp sau khi tr\u1ed3ng t\u1eeb 4-6 th\u00e1ng \u0111\u00e3 sinh tr\u01b0\u1edfng \u1ed5n \u0111\u1ecbnh va\u0300 b\u1eaft \u0111\u1ea7u \u0111\u1ebb nh\u00e1nh. M\u00e2y n\u1ebfp tr\u1ed3ng trong m\u00f4 h\u00ecnh d\u01b0\u1edbi t\u00e1n r\u01b0\u0300ng \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n (b\u00ecnh qu\u00e2n \u0111\u1ea1t 1,06cm), c\u00e1c m\u00f4 h\u00ecnh c\u00f2n l\u1ea1i \u0111\u01b0\u1eddng k\u00ednh th\u1ea5p h\u01a1n v\u00e0 \u0111\u1ea1t 0,98cm \u1edf m\u00f4 h\u00ecnh v\u01b0\u1eddn \u0111\u1ed3i v\u00e0 0,96cm \u1edf m\u00f4 h\u00ecnh h\u00e0ng r\u00e0o. Sinh tr\u01b0\u1edfng chi\u1ec1u cao c\u1ee7a M\u00e2y n\u1ebfp \u1edf tu\u1ed5i 2,5 \u0111\u1ea1t cao nh\u1ea5t t\u1ea1i m\u00f4 h\u00ecnh tr\u00f4\u0300ng la\u0300m h\u00e0ng r\u00e0o (220,2cm), m\u00f4 h\u00ecnh v\u01b0\u1eddn \u0111\u1ed3i l\u00e0 184,3cm v\u00e0 m\u00f4 h\u00ecnh d\u01b0\u1edbi t\u00e1n \u0111\u1ea1t 174,3cm. Ch\u1ea5t l\u01b0\u1ee3ng M\u00e2y n\u1ebfp t\u1ea1i c\u00e1c m\u00f4 h\u00ecnh dao \u0111\u1ed9ng t\u1eeb 31,2% (tu\u1ed5i 1) t\u0103ng l\u00ean 59,4% (tu\u1ed5i 2).T\u1eeb kh\u00f3a: <\/i><\/b>M\u00e2y n\u1ebfp, sinh tr\u01b0\u1edfng, v\u00f9ng \u0111\u1ec7m, V\u01b0\u1eddn Qu\u1ed1c gia Ba V\u00ec<\/td>\n<\/tr>\n
\n

Examine the growth ability of Calamus tetradactylus <\/i>Hance (K83 clone) in the models of agricultural extension project in buffer zone of Ba Vi National Park<\/b><\/p>\n

The high survival rates (from 95.3 to 97.1% in average) of Calamus tetradactylus <\/i>Hance (clone K83) was found in the trial model in three investigated communes in buffer zone of Ba Vi National Park. After planting from four to six months, the growth of C. tetradactylus <\/i>was become staidly; and the new generation (new branches) of this species was found in each clump. In addition, more branches were found in this period with higher birth rates of new branches being recorded. The highest diameter increment of C. tetradactylus <\/i>was found in understory planting model (1.06cm in average), while the other models had lower growing rates with average diameter being 0.98cm in garden planting model and 0.96 cm in the fence lines planting model. By contrast, the highest height increment at age of 2.5 years was found in the model of fence lines planting (220.2cm), followed by the figure of garden planting model (184.3 cm) and the lowest height of understory planting model, the average height was only 174.3 cm. It is also noted that the quality of C. tetradactylus <\/i>in all most all models increased (from 31.2% to 59.4% between age 1 and 2 years olds<\/p>\n

Keywords: <\/i><\/b>Calamus tetradactylus <\/i>Hance, growth, buffer zone, Ba Vi National Park<\/p>\n

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

4. NGHI\u00caN C\u1ee8U PH\u00c2N NH\u00d3M LO\u00c0I THEO M\u1ed8T S\u1ed0 \u0110\u1eb6C TR\u01afNG SINH TR\u01af\u1edeNG PH\u1ee4C V\u1ee4 X\u00c5Y D\u1ef0NG M\u00d4 H\u00ccNH T\u0102NG TR\u01af\u1edeNG \u0110\u01af\u1edcNG K\u00cdNH THEO NH\u00d3M LO\u00c0I CHO 4 KHU R\u1eeaNG \u0110\u1eb6C D\u1ee4NG THU\u1ed8C MI\u1ec0N B\u1eaeC VI\u1ec6T NAM<\/b><\/p>\n

Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n1*, Tr\u1ea7n V\u0103n Con2, Tr\u1ea7n Th\u1ecb Thu H\u00e01 <\/b><\/p>\n

1 Vi\u1ec7n Nghi\u00ean c\u1ee9u v\u00e0 Ph\u00e1t tri\u1ec3n L\u00e2m nghi\u1ec7p – Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng l\u00e2m Th\u00e1i Nguy\u00ean 2 Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/b><\/p>\n

 <\/p>\n\n\n\n\n
Trong nghi\u00ean c\u1ee9u n\u00e0y, ch\u00fang t\u00f4i s\u1eed d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u bao g\u1ed3m 6504 c\u00e2y c\u00e1 th\u1ec3 (v\u1edbi D1.3 \u226510cm) thu\u1ed9c 333 lo\u00e0i, \u0111\u01b0\u1ee3c \u0111o hai l\u1ea7n v\u1edbi kho\u1ea3ng c\u00e1ch 5 n\u0103m (t\u1eeb n\u0103m 2007 – 2012). D\u1ef1a tr\u00ean ch\u1ec9 ti\u00eau th\u1ed1ng k\u00ea t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n n\u0103m (ZD), \u0111\u01b0\u1eddng k\u00ednh t\u1ed1i \u0111a m\u00e0 lo\u00e0i \u0111\u1ea1t \u0111\u01b0\u1ee3c (Dmax) v\u00e0 d\u1ea1ng s\u1ed1ng c\u1ee7a lo\u00e0i, b\u1eb1ng ph\u00e2n t\u00edch nh\u00f3m v\u1edbi chi\u1ebfn l\u01b0\u1ee3c K-Means, \u0111\u00e3 ph\u00e2n th\u00e0nh 9 nh\u00f3m lo\u00e0i: (1) Nh\u00f3m g\u1ed7 nh\u1ecf t\u0103ng tr\u01b0\u1edfng ch\u1eadm; (2) Nh\u00f3m g\u1ed7 nh\u1ecf t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh; (3) Nh\u00f3m g\u1ed7 nh\u1ecf t\u0103ng tr\u01b0\u1edfng nhanh; (4) Nh\u00f3m g\u1ed7 nh\u1ee1 t\u0103ng tr\u01b0\u1edfng ch\u1eadm; (5) Nh\u00f3m g\u1ed7 nh\u1ee1 t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh; (6) Nh\u00f3m g\u1ed7 nh\u1ee1 t\u0103ng tr\u01b0\u1edfng nhanh; (7) Nh\u00f3m g\u1ed7 l\u1edbn t\u0103ng tr\u01b0\u1edfng ch\u1eadm; (8) Nh\u00f3m g\u1ed7 l\u1edbn t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh; (9) Nh\u00f3m g\u1ed7 l\u1edbn t\u0103ng tr\u01b0\u1edfng nhanh.T\u1eeb kh\u00f3a: <\/i><\/b>Khu r\u1eebng \u0111\u1eb7c d\u1ee5ng, mi\u1ec1n B\u1eafc Vi\u1ec7t Nam, ph\u00e2n nh\u00f3m lo\u00e0i, Ba B\u1ec3, Hang Kia – P\u00e0 C\u00f2, V\u0169 Quang, Xu\u00e2n S\u01a1n.<\/td>\n<\/tr>\n
\n

Studying grouping species according to some growth characteristics to construct diameter growth models for four special-use forest regions in Northern Vietnam<\/b><\/p>\n

In this study, The data set comprise 6504 individuals of 333 species, which have at least two censuses has been used. Based on average diameter increment and maximal diameter observed for each tree species and life forms, tree species were classified into 9 functional groups by using cluster analysis with K-Means strategy: (1) Small sized slow growing species; (2) Small sized moderate growing species; (3) Small sized fast growing species; (4) Medium sized, slow growing species; (5) Medium sized, moderate growing species; (6) Medium sized, fast growing species; (7) large slow growing species; (8) Large moderate growing species; (9) Large fast growing species.<\/p>\n

Keywords: <\/i><\/b>Forest conservation, Northern Vietnam, species grouping, Ba Be, Hang Kia – Pa Co, Vu Quang, Xuan Son.<\/p>\n

 <\/p>\n

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

5. M\u1ed0I QUAN H\u1ec6 C\u1ee6A THANH TH\u1ea4T (Ailanthus triphysa <\/i>(Dennst) Alston) V\u1edaI C\u00c1C LO\u00c0I TRONG R\u1eeaNG T\u1ef0 NHI\u00caN \u1ede 3 V\u00d9NG SINH TH\u00c1I TR\u1eccNG \u0110I\u1ec2M<\/b><\/p>\n

Ph\u1ea1m V\u0103n B\u1ed1n, Ph\u1ea1m Th\u1ebf D\u0169ng, Nguy\u1ec5n V\u0103n Thi\u1ebft <\/b><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/i><\/p>\n\n\n\n\n
M\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c lo\u00e0i c\u00e2y trong t\u1ef1 nhi\u00ean l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u1ed3ng r\u1eebng h\u1ed7n lo\u00e0i. Nghi\u00ean c\u1ee9u m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c lo\u00e0i l\u00e0 c\u00f4ng vi\u1ec7c kh\u00f3 kh\u0103n, ph\u1ee9c t\u1ea1p, v\u1edbi nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra \u00f4 6 c\u00e2y v\u00e0 ch\u1ec9 s\u1ed1 t\u1ea7n su\u1ea5t xu\u1ea5t hi\u1ec7n, \u0111\u1ec3 nghi\u00ean c\u1ee9u m\u1ed1i quan h\u1ec7 gi\u1eefa Thanh th\u1ea5t v\u1edbi c\u00e1c lo\u00e0i c\u00e2y b\u1ea1n, \u1edf 3 \u0111\u1ecba \u0111i\u1ec3m l\u00e0 V\u0129nh Ph\u00fac, Qu\u1ea3ng Nam v\u00e0 \u0110\u1ed3ng Nai, k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c nh\u01b0 sau: S\u1ed1 lo\u00e0i c\u00e2y xu\u1ea5t hi\u1ec7n c\u00f9ng v\u1edbi Thanh th\u1ea5t, nhi\u1ec1u nh\u1ea5t l\u00e0 \u1edf \u0110\u1ed3ng Nai, v\u1edbi 62 lo\u00e0i, Qu\u1ea3ng Nam l\u00e0 48 lo\u00e0i v\u00e0 \u1edf V\u0129nh Ph\u00fac 47 lo\u00e0i; Nh\u00f3m lo\u00e0i r\u1ea5t hay g\u1eb7p c\u00f9ng v\u1edbi Thanh th\u1ea5t \u1edf V\u0129nh Ph\u00fac c\u00f3 3 lo\u00e0i, \u1edf Qu\u1ea3ng Nam v\u00e0 \u0110\u1ed3ng Nai \u0111\u1ec1u c\u00f3 2 lo\u00e0i; Nh\u00f3m lo\u00e0i hay b\u1eaft g\u1eb7p cao nh\u1ea5t l\u00e0 \u1edf Qu\u1ea3ng Nam v\u1edbi 11 lo\u00e0i, 2 \u0111\u1ecba \u0111i\u1ec3m c\u00f2n l\u1ea1i \u0111\u1ec1u c\u00f3 6 lo\u00e0i; \u1ede V\u0129nh Ph\u00fac v\u00e0 Qu\u1ea3ng Nam, Thanh th\u1ea5t \u0111\u1ec1u xu\u1ea5t hi\u1ec7n c\u00f9ng v\u1edbi n\u00f3 \u1edf nh\u00f3m r\u1ea5t hay b\u1eaft g\u1eb7p, trong khi \u1edf \u0110\u1ed3ng Nai Thanh th\u1ea5t ho\u00e0n to\u00e0n kh\u00f4ng th\u1ea5y xu\u1ea5t hi\u1ec7n c\u00f9ng v\u1edbi n\u00f3; \u1ede c\u1ea3 3 \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u Thanh th\u1ea5t \u0111\u1ec1u xu\u1ea5t hi\u1ec7n \u1edf t\u1ea7ng tr\u00ean c\u1ee7a t\u00e1n r\u1eebng, ch\u1ec9 s\u1ed1 trung b\u00ecnh D1.3 v\u00e0 Hvn \u0111\u1ec1u v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c lo\u00e0i c\u00e2y b\u1ea1n.T\u1eeb kh\u00f3a: <\/i><\/b>M\u1ed1i quan h\u1ec7, Thanh th\u1ea5t, v\u00f9ng sinh th\u00e1i.<\/td>\n<\/tr>\n
\n

Relationship between (Ailanthus triphysa <\/i>(Dennst) Alston) and other species in three main ecological regions in Vietnam<\/b><\/p>\n

Relation among species in natural environment is an important basic for studying tree planting technology, especially for establishing mixing plantation. Study of relation between species is a complex process in which many methods have been used. The method of \u201c6 tree plot\u201d and appearing frequency index were used to study the relation of Ailanthus triphysa <\/i>and other species in 3 main ecological regions. The results showed that: In Dong Nai, there were 62 species living with A. triphysa<\/i>; 48 and 47 species in Quang Nam, Vinh Phuc respectively; The number of species appearing with A. triphysa <\/i>with very high frequence were 3; 2 species in both Quang Nam and Dong Nai; The number of tree species appearing next to A. triphysa with high frequence were 11 in Quang Nam and 6 in remain places. A. triphysa <\/i>was found as dominant trees in secondary natural forest in 3 places, DBH and Ht are higher than that of neighbour species.<\/p>\n

Keywords: <\/i><\/b>A. triphysa<\/i>, ecological region, relation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

6. NGHI\u00caN C\u1ee8U T\u1ed4NG SINH KH\u1ed0I R\u1ec4 C\u00c1M S\u1ea2N SINH H\u00c0NG N\u0102M CHO R\u1eeaNG T\u1ef0 NHI\u00caN L\u00c1 R\u1ed8NG TH\u01af\u1edcNG XANH T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN COPIA<\/b><\/p>\n

Tr\u1ea7n V\u0103n \u0110\u00f41, Nguy\u1ec5n To\u00e0n Th\u1eafng1, \u0110\u1eb7ng V\u0103n Thuy\u1ebft1, Tr\u1ea7n Quang Trung2, Tr\u1ea7n Ho\u00e0ng Qu\u00fd1, Nguy\u1ec5n Th\u1ecb Thu Ph\u01b0\u01a1ng1, B\u00f9i H\u1eefu Th\u01b0\u1edfng3 <\/b><\/p>\n

1Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, 2Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p T\u00e2y B\u1eafc, 3Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/i><\/b><\/p>\n

 <\/p>\n\n\n\n\n
R\u1ec5 c\u00e1m (\uf066 \u2264 2mm) \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e2y, \u0111\u1ea3m nhi\u1ec7m ch\u1ee9c n\u0103ng h\u00fat n\u01b0\u1edbc v\u00e0 ch\u1ea5t dinh d\u01b0\u1ee1ng. R\u1ec5 c\u00e1m c\u0169ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi chu tr\u00ecnh c\u00e1c bon trong h\u1ec7 sinh th\u00e1i r\u1eebng, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi qu\u00e1 tr\u00ecnh ho\u00e0n tr\u1ea3 l\u1ea1i ch\u1ea5t dinh d\u01b0\u1ee1ng cho \u0111\u1ea5t. B\u00e0i b\u00e1o n\u00e0y tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c t\u1ed5ng sinh kh\u1ed1i r\u1ec5 c\u00e1m s\u1ea3n sinh cho r\u1eebng nguy\u00ean sinh v\u00e0 r\u1eebng ph\u1ee5c h\u1ed3i 34 n\u0103m sau canh t\u00e1c n\u01b0\u01a1ng r\u1eaby t\u1ea1i khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean Copia, Thu\u1eadn Ch\u00e2u – S\u01a1n La. K\u1ebft qu\u1ea3 ch\u1ec9 ra r\u1eb1ng, c\u00f3 65% r\u1ec5 c\u00e1m ph\u00e2n b\u1ed1 \u1edf t\u1ea7ng \u0111\u1ea5t m\u1eb7t (0 – 20cm) trong r\u1eebng nguy\u00ean sinh v\u00e0 76,6% trong r\u1eebng ph\u1ee5c h\u1ed3i. T\u1ed5ng l\u01b0\u1ee3ng r\u1ec5 c\u00e1m s\u1ea3n sinh ra trong 1 n\u0103m \u0111\u1ea1t 3,7 t\u1ea5n\/ha \u0111\u1ed1i v\u1edbi r\u1eebng nguy\u00ean sinh v\u00e0 1,3 t\u1ea5n\/ha \u0111\u1ed1i v\u1edbi r\u1eebng ph\u1ee5c h\u1ed3i. L\u01b0\u1ee3ng r\u1ec5 c\u00e1m ch\u1ebft \u0111i \u0111\u1ea1t 0,26 t\u1ea5n\/ha cho r\u1eebng nguy\u00ean sinh v\u00e0 0,12 t\u1ea5n\/ha cho r\u1eebng ph\u1ee5c h\u1ed3i. L\u01b0\u1ee3ng r\u1ec5 c\u00e1m ch\u1ebft \u0111i b\u1ecb ph\u00e2n h\u1ee7y ho\u00e0n to\u00e0n \u0111\u1ea1t 0,11 t\u1ea5n\/ha cho r\u1eebng nguy\u00ean sinh v\u00e0 0,04 t\u1ea5n\/ha cho r\u1eebng ph\u1ee5c h\u1ed3i. T\u1ed5ng l\u01b0\u1ee3ng sinh kh\u1ed1i r\u1ec5 c\u00e1m s\u1ea3n sinh ra cho r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh t\u1ea1i nghi\u00ean c\u1ee9u n\u00e0y th\u1ea5p h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi c\u00e1c nghi\u00ean c\u1ee9u kh\u00e1c tr\u00ean th\u1ebf gi\u1edbi.T\u1eeb kh\u00f3a: <\/i><\/b>C\u00e2n b\u1eb1ng sinh kh\u1ed1i, r\u1ec5 c\u00e1m, r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh, sinh kh\u1ed1i s\u1ea3n sinh<\/td>\n<\/tr>\n
\n

Fine root production estimation for natural evergreen broadleaved forests in Copia Natural Reserve, Vietnam<\/b><\/p>\n

Fine roots (\uf066 \u22642mm) function as absorbing water and nutrients to sustain tree\u2019s life and play an important role in carbon cycle and carbon deposit to the soil in forest ecosystem. In this study, fine root production, mortality, and decomposition were estimated for old-growth forest and secondary forest recovered after 34 years shifting cultivation in Northwestern, Vietnam. The results indicated that there was 65% and 76.6% fine roots distributing in 0-20 cm soil surface in old-growth forest and secondary forest, respectively. Annual fine root production achieved 3.7 tons\/ha in old-growth forest and 1.3 tons\/ha in secondary forest, respectively. Meanwhile, annual fine root mortality was 0.26 tons\/ha and 0.12 tons\/ha and annual fine root decomposition was 0.11 ton\/ha and 0.04 ton\/ha for old-growth forest and secondary forest, respectively. Fine root production in evergreen broadleaved forest in northwest, Vietnam in this study was much lower than that in other forests around the world.<\/p>\n

Keywords: <\/i><\/b>Evergreen broadleaved forest, fineroot, mass-balanced model, production<\/p>\n

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

7. K\u1ebeT QU\u00c2 PH\u00c5N T\u00cdCH C\u00c1C NH\u00d3M CH\u1ea4T Polysaccarit, Axit b\u00e9o, Alkaloid TRONG QU\u1ea2 \u01af\u01a0I T\u1ea0I C\u00c1C V\u00d9NG NGHI\u00caN C\u1ee8U<\/b><\/p>\n

\u0110o\u00e0n \u0110i\u0300nh Tam, L\u00ea Qu\u1ed1c Huy, V\u0169 Qu\u00fd \u0110\u00f4ng <\/b><\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/i><\/b><\/p>\n\n\n\n
H\u00e0m l\u01b0\u1ee3ng c\u00e1c nh\u00f3m ch\u1ea5t polysaccarit, Axit b\u00e9o, Alkaloid trong qu\u1ea3 \u01af\u01a1i bi\u1ebfn \u0111\u1ed9ng theo v\u00f9ng v\u00e0 tr\u1ea1ng th\u00e1i qu\u1ea3, trong \u0111\u00f3 \u01af\u01a1i bay c\u00f3 h\u00e0m l\u01b0\u1ee3ng polysaccarit v\u00e0 Lipit cao h\u01a1n so v\u1edbi c\u00e1c m\u1eabu c\u00f2n l\u1ea1i. Trong qu\u1ea3 \u01af\u01a1i c\u00f3 9 lo\u1ea1i axit b\u00e9o t\u1eeb axit Hexadecanoic (Axit palmitic) \u0111\u1ebfn axit Octadecatetraenoic (Axit linolennic), trong \u0111\u00f3 axit Octadecadienoic (Axit linoleic) c\u00f3 h\u00e0m l\u01b0\u1ee3ng cao nh\u1ea5t (t\u1eeb 45,23% \u0111\u1ebfn 48,21%). C\u00e1c lo\u1ea1i axit nh\u01b0 heptadecenoic; Axit heptadecenoic; Axit margaric chi\u1ebfm m\u1ed9t h\u00e0m l\u01b0\u1ee3ng r\u1ea5t nh\u1ecf trong qu\u1ea3 \u01af\u01a1i (0,07 – 0,5%). K\u1ebft qu\u1ea3 \u0111\u1ecbnh t\u00ednh alkaloid trong qu\u1ea3 \u01b0\u01a1i v\u00e0 x\u00e1c \u0111\u1ecbnh alkaloid cho th\u1ea5y t\u1ea5t c\u1ea3 c\u00e1c m\u1eabu ph\u00e2n t\u00edch kh\u00f4ng ch\u1ee9a ho\u1eb7c ch\u1ee9a v\u1edbi h\u00e0m l\u01b0\u1ee3ng r\u1ea5t th\u1ea5p alkaloid. Kh\u1ed1i l\u01b0\u1ee3ng ph\u1ea7n ch\u1ea5t b\u00e9o (c\u1eb7n chi\u1ebft n-hexan) v\u00e0 c\u1eb7n chi\u1ebft metanol (MeOH) thay \u0111\u1ed5i theo v\u00f9ng, cao nh\u1ea5t l\u00e0 c\u00e1c m\u1eabu t\u1ea1i T\u00e2y Nguy\u00ean, ti\u1ebfp \u0111\u1ebfn l\u00e0 B\u1eafc Trung B\u1ed9 v\u00e0 th\u1ea5p nh\u1ea5t \u1edf c\u00e1c m\u1eabu c\u1ee7a Nam Trung B\u1ed9 v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng ph\u1ea7n ch\u1ea5t b\u00e9o (c\u1eb7n chi\u1ebft n-hexan) v\u00e0 c\u1eb7n chi\u1ebft metanol (MeOH) c\u1ee7a c\u00e1c m\u1eabu trong t\u1eebng v\u00f9ng nghi\u00ean c\u1ee9u c\u0169ng c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed9ng v\u00e0 c\u00f3 xu h\u01b0\u1edbng t\u0103ng ho\u1eb7c gi\u1ea3m theo tu\u1ed5i v\u00e0 tr\u1ea1ng th\u00e1i qu\u1ea3. Khi c\u1eb7n chi\u1ebft t\u0103ng th\u00ec h\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t polysaccarit, lipid, c\u00e1c axit b\u00e9o gi\u1ea3m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eeb kho\u00e1: <\/i><\/b>\u01af\u01a1i, Polysaccarit, Axit, Alkaloid<\/p>\n

 <\/p>\n

Results of analysis about substances group Polysaccharide, fatty acid, Alkaloid in Scaphium macropodum <\/i>fruits at regions research<\/b><\/p>\n

The content of group Polysaccharide, Fatty acid, Alkaloid in Scaphium macropodum <\/i>fruits fluctuates depending on regions and status of them, in which Polysaccharide and lipid content in the wind-dispersed fruits (fruits with a boat-shaped wing derived from a dehiscing follicle) is higher than other samples. Fruits of S.macropodum <\/i>have 9 types of fatty acids varying from Hexadecanoic to Octadecatetraenoic acid (Acid linolennic), amongst which the content of Octadecadienoic acid (linoleic acid) is the highest (from 45.23% to 48.21%). Other acids such as Heptadecenoic; Heptadecenoic acid; Margaric acid accounted for a very small amount of fruits (0.07 – 0.5%). Qualitative analysis results determining for alkaloid in S.macropodum <\/i>fruits showed that all samples contain non or very low concentrations of alkaloids. The contents of Fats (n-hexane extract and methanol (MeOH) vary depending on regions: highest in samples collected at Tay Nguyen, next to North Central Coast and lowest South Central Coast. Fat content (n-hexane and methanol (MeOHextract) of samples in each region also fluctuate and tends to increase or decrease with age and status of fruits.<\/p>\n

Keywords: <\/i><\/b>Scaphium macropodum, Polysaccharide, Acid, Alkaloid<\/p>\n

 <\/p>\n

 <\/p>\n

8. T\u00ccNH H\u00ccNH G\u00c5Y TR\u1ed2NG V\u00c0 S\u1eec D\u1ee4NG C\u00c5Y C\u00d3C H\u00c0NH \u1ede C\u00c1C T\u1ec8NH NINH THU\u1eacN V\u00c0 B\u00ccNH THU\u1eacN<\/b><\/p>\n

H\u00e0 Th\u1ecb M\u1eebng, \u0110inh Thanh Giang, Ph\u00f9ng V\u0103n Khen,V\u0169 Ng\u1ecdc H\u00e0 <\/b><\/p>\n

1 Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng, 2Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9, 3Tr\u01b0\u1eddng C\u0110N C\u00f4ng ngh\u1ec7 v\u00e0 N\u00f4ng L\u00e2m Ph\u00fa Th\u1ecd<\/i><\/b><\/p>\n\n\n\n
\u00a0<\/b>C\u00f3c h\u00e0nh (Azadirachta excelsa <\/i>(Jack) Jacob) l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u0111a m\u1ee5c \u0111\u00edch c\u1ee7a v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung B\u1ed9, \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng \u1edf c\u00e1c t\u1ec9nh Ninh Thu\u1eadn v\u00e0 B\u00ecnh Thu\u1eadn trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y. \u0110\u00e1nh gi\u00e1 t\u00ecnh h\u00ecnh g\u00e2y tr\u1ed3ng v\u00e0 s\u1eed d\u1ee5ng C\u00f3c h\u00e0nh g\u00f3p ph\u1ea7n l\u00e0m c\u01a1 s\u1edf cho \u0111\u1ec1 xu\u1ea5t ph\u00e1t tri\u1ec3n m\u1edf r\u1ed9ng lo\u00e0i c\u00e2y n\u00e0y. K\u1ebft qu\u1ea3 cho th\u1ea5y, trong nh\u1eefng n\u0103m 2005 -2011 m\u1ed7i n\u0103m t\u1ec9nh Ninh Thu\u1eadn tr\u1ed3ng 20 – 100ha, ngo\u00e0i ra c\u00f2n tr\u1ed3ng ph\u00e2n t\u00e1n \u1edf c\u00e1c c\u00f4ng s\u1edf, ven \u0111\u01b0\u1eddng. T\u1ec9nh B\u00ecnh Thu\u1eadn, ch\u01b0a c\u00f3 phong tr\u00e0o tr\u1ed3ng r\u1eebng b\u1eb1ng c\u00e2y C\u00f3c h\u00e0nh, m\u1edbi c\u00f3 11,5ha m\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m c\u1ee7a c\u00e1c \u0111\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u khoa h\u1ecdc. C\u00f3c h\u00e0nh \u0111\u01b0\u1ee3c tr\u1ed3ng tr\u00ean nhi\u1ec1u lo\u1ea1i \u0111\u1ea5t kh\u00e1c nhau, h\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng t\u1eeb r\u1ea5t ngh\u00e8o \u0111\u1ebfn gi\u00e0u. H\u1ec7 th\u1ed1ng c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng kh\u00e1c nhau \u1edf c\u00e1c m\u00f4 h\u00ecnh. T\u1ef7 l\u1ec7 s\u1ed1ng b\u00ecnh qu\u00e2n c\u1ee7a C\u00f3c h\u00e0nh t\u1ea1i Ninh S\u01a1n l\u00e0 90,76%, t\u1ea1i Ninh Ph\u01b0\u1edbc l\u00e0 97,73%, t\u1ea1i S\u00f4ng S\u1eaft l\u00e0 95,91%, t\u1ea1i N\u00fai Ch\u00faa l\u00e0 62,58%, t\u1ea1i Tuy Phong l\u00e0 79,5%, t\u1ea1i Phan Thi\u1ebft l\u00e0 81,6%. Sau 2-3 n\u0103m tr\u1ed3ng c\u00e2y c\u00f3 t\u0103ng tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c l\u00e0 0,41 – 1,18cm\/n\u0103m v\u00e0 chi\u1ec1u cao l\u00e0 0,34 – 0,57m\/n\u0103m. Sau 5-7 n\u0103m tr\u1ed3ng c\u00e2y c\u00f3 t\u0103ng tr\u01b0\u1edfng 0,49 – 2,17 cm\/n\u0103m v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 0,18 – 0,97m\/n\u0103m v\u1ec1 chi\u1ec1u cao. C\u00f3c h\u00e0nh kh\u00f3 c\u00f3 kh\u1ea3 n\u0103ng tr\u1ed3ng th\u00e0nh r\u1eebng tr\u00ean \u0111\u1ea5t c\u00e1t \u0111\u1ecf. G\u1ed7 C\u00f3c h\u00e0nh ch\u1ee7 y\u1ebfu d\u00f9ng \u0111\u1ec3 \u0111\u00f3ng \u0111\u1ed3 gia d\u1ee5ng, h\u1ea1t v\u00e0 v\u1ecf l\u00e0m nguy\u00ean li\u1ec7u cho c\u00f4ng nghi\u1ec7p x\u00e0 ph\u00f2ng, nhu\u1ed9m…, l\u00e1 v\u00e0 b\u00e3 h\u1ea1t s\u1eed d\u1ee5ng l\u00e0m thu\u1ed1c tr\u1eeb s\u00e2u. R\u1eebng C\u00f3c h\u00e0nh c\u00f3 t\u00e1c d\u1ee5ng ph\u00f2ng h\u1ed9, h\u1ea1n ch\u1ebf x\u00f3i m\u00f2n \u0111\u1ea5t, gi\u1eef \u0111\u1ed9 \u1ea9m cho \u0111\u1ea5t, v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i trong khu v\u1ef1c.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eeb kh\u00f3a: <\/i><\/b>C\u00f3c h\u00e0nh, g\u00e2y tr\u1ed3ng v\u00e0 s\u1eed d\u1ee5ng<\/p>\n

 <\/p>\n

Planting and use of Azadirachta excelsa <\/i>in Ninh Thuan and Binh Thuan provinces<\/b><\/p>\n

Azadirachta excelsa <\/i>(Jack) Jacob is a multiple used indigenous species in the dry regions of South Central Coast of Vietnam. Azadirachta excelsa <\/i>(Jack) Jacob has been planted in Ninh Thuan and Binh Thuan province recently. Results on asessment of plantation and use status of this species provided scientific basis for the delvelopment of this species. Research results showed that from 2005 to 2010, there were about 20 to 100ha of Azadirachta excelsa <\/i>(Jack) Jacob planted in Ninh Thuan province annually. In Binh Thuan province, the species has not been planted porpularly. There were only 11.5ha planted as experimental area for scientific purposes. Azadirachta excelsa <\/i>has been planted in various types of soil with nutrient contents ranging from extremply poor to rich. Different planting techniques are also applied to planting models. Average survival rate of the species are 90.76%, 97.73%, 95.91%, 62.58%, 79.5%, 81.6% at Ninh Son, Ninh Phuoc, Song Sat, Nui Chua, Tuy Phong and Phan Thiet respectively. After planting of 2-3 years, average stem diameter increment was 0.41-1.18 cm\/year and heigh increment was about 0.34 – 0.57 m\/year. These indicators were 0.49 – 2.17 cm\/year and 0.18 – 0.97m\/year respectively for the species after planting 5 – 7 years. Azadirachta excelsa <\/i>(Jack) Jacob was unlikely planted as forest in red sand areas. Wood of the species are maily used for household items, seed and bark are used as materials for soap and dyeing industries,… leaves and trash particles are used as pesticide Azadirachta excelsa <\/i>(Jack) Jacob forest plays important roles in protection, soil erosion limitation, soil moist keeping and ecological environmental protection for the region.<\/p>\n

Keywords: <\/i><\/b>Azadirachta excelsa<\/i>, planting and use<\/p>\n

 <\/p>\n

 <\/p>\n

9. PH\u00c5N L\u1eacP, TUY\u1ec2N CH\u1eccN VI KHU\u1ea8N PH\u00c5N GI\u1ea2I XENLULO S\u1ea2N XU\u1ea4T PH\u00c5N H\u1eeeU C\u01a0 SINH H\u1eccC<\/b><\/p>\n

Nguy\u1ec5n Th\u1ecb Thu\u00fd Nga1, Ph\u1ea1m Quang Nam2, L\u00ea Xu\u00e2n Ph\u00fac1, Ph\u1ea1m Quang Thu1, Nguy\u1ec5n Minh Ch\u00ed1 <\/b><\/p>\n

1. Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam 2. Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Qu\u1ed1c gia H\u00e0 N\u1ed9i<\/i><\/b><\/p>\n\n\n\n
N\u01b0\u1edbc ta \u01b0\u1edbc t\u00ednh kho\u1ea3ng 10% ph\u1ebf li\u1ec7u g\u1ed7 c\u00f3 th\u1ec3 thu gom v\u00e0 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c, tuy nhi\u00ean ch\u1ec9 m\u1ed9t ph\u1ea7n nh\u1ecf \u0111\u01b0\u1ee3c t\u1eadn d\u1ee5ng cho c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau c\u00f2n l\u1ea1i h\u1ea7u h\u1ebft b\u1ecb th\u1ea3i b\u1ecf ho\u1eb7c x\u1eed l\u00fd b\u1eb1ng c\u00e1ch \u0111\u1ed1t, \u0111i\u1ec1u n\u00e0y g\u00e2y l\u00e3ng ph\u00ed v\u00e0 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng t\u1edbi m\u00f4i tr\u01b0\u1eddng v\u00e0 b\u1ea3o v\u1ec7 r\u1eebng. X\u1eed l\u00fd c\u00e1c ph\u1ebf th\u1ea3i trong l\u00e2m nghi\u1ec7p b\u1eb1ng c\u00f4ng ngh\u1ec7 vi sinh v\u1eadt t\u1ecf ra c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m c\u1ea3 v\u1ec1 hi\u1ec7u qu\u1ea3 m\u00f4i tr\u01b0\u01a1\u0300ng, kinh t\u1ebf va\u0300 k\u1ef9 thu\u1eadt, \u0111\u1ed3ng th\u1eddi t\u1ea1o ra s\u1ea3n ph\u1ea9m ph\u00e2n b\u00f3n h\u1eefu c\u01a1 co\u0301 th\u00ea\u0309 ta\u0301i s\u01b0\u0309 du\u0323ng cho s\u1ea3n xu\u1ea5t n\u00f4ng l\u00e2m nghi\u1ec7p. Trong khu\u00f4n kh\u1ed5 th\u00ed nghi\u1ec7m n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 ph\u00e2n l\u1eadp \u0111\u01b0\u1ee3c 24 ch\u1ee7ng vi sinh v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n gi\u1ea3i xenlulo, tuy\u1ec3n ch\u1ecdn 2 ch\u1ee7ng vi khu\u1ea9n X1 <\/b>v\u00e0 X10 <\/b>c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n gi\u1ea3i xenlulo m\u1ea1nh \u0111\u01b0\u1ee3c nh\u00e2n sinh kh\u1ed1i \u0111\u1ec3 s\u1ea3n xu\u1ea5t ph\u00e2n h\u1eefu c\u01a1 sinh h\u1ecdc. Ch\u1ee7ng X1 ph\u00e1t tri\u1ec3n t\u1ed1t nh\u1ea5t, c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n gi\u1ea3i xenlulo cao nh\u1ea5t khi \u0111\u01b0\u1ee3c nu\u00f4i c\u1ea5y tr\u00ean m\u00f4i tr\u01b0\u1eddng PD c\u00f3 1% CMC v\u1edbi nhi\u1ec7t \u0111\u1ed9 30 – 35oC v\u00e0 \u0111\u1ed9 pH = 5,5. Ch\u1ee7ng X10 ph\u00e1t tri\u1ec3n t\u1ed1t nh\u1ea5t, c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n gi\u1ea3i xenlulo cao nh\u1ea5t khi \u0111\u01b0\u1ee3c nu\u00f4i c\u1ea5y trong m\u00f4i tr\u01b0\u1eddng PD c\u00f3 1% CMC v\u1edbi nhi\u1ec7t \u0111\u1ed9 35oC v\u00e0 \u0111\u1ed9 pH = 6 – 6,5. V\u1eadt li\u1ec7u v\u1ecf v\u00e0 l\u00e1 keo \u0111\u01b0a v\u00e0o \u1ee7 ph\u00e2n h\u1eefu c\u01a1 sinh h\u1ecdc c\u1ea7n s\u01a1 ch\u1ebf gi\u1eadp n\u00e1t v\u1edbi k\u00edch th\u01b0\u1edbc 2 \uf0b4 3cm, v\u1edbi \u0111\u1ed9 \u1ea9m \u0111\u1ea1t t\u1eeb 50 – 60%, pH = 6 – 7, th\u1eddi gian t\u1ea1o ph\u00e2n h\u1eefu c\u01a1 sinh h\u1ecdc kho\u1ea3ng 90 ng\u00e0y, \u0111\u1ea1t h\u00e0m l\u01b0\u1ee3ng NPK l\u00e0 cao nh\u1ea5t v\u00e0 h\u00e0m l\u01b0\u1ee3ng h\u1eefu c\u01a1 \u0111\u1ea1t t\u1edbi 23%.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eeb kho\u00e1: <\/i><\/b>Ph\u00e2n h\u1eefu c\u01a1 sinh h\u1ecdc, vi khu\u1ea9n ph\u00e2n gi\u1ea3i xenlulo<\/p>\n

Isolating and screening cellulolytic microorganisms to produce organic biofertilizer <\/b>Estimatedly, in Vietnam, there are at least 10% of scrap wood can be collected and reused. However, just a small amount was reused for different purposes and the rest was discarded or burned, which not only caused serious financial and enviromental damage but also affected forest protection. Composting forestry scrap with mircobiological technique has shown various environmental and economic advantages. Moreover, the process also produced organic biofertilizer which can apply to agricutural and forestry soil. In this study, 24 cellulose degrading strains were isolated, in which microbial strain X1 and X2 had the highest activity and were applied to produce organic bioferilizer. Strain X1 showed the greatest development and cellulose degration in PD 1% CMC medium at 30 – 35oC and pH level 5.5. Strain X10 showed the greatest development and cellulose degration in PD 1% CMC medium at 35oC and pH level 6 – 6.5. In composting process, to yield the highest NPK content and organic content of 23%, Acacia bark and leaf materials need to crush into 2 \uf0b4 3cm pieces, maintain the humidity at 50 – 60%, pH = 6 – 7 and composting time last for 90 days.<\/p>\n

Keywords: <\/i><\/b>Microbes decompose celulose, microbes decompose cellulose<\/p>\n

 <\/p>\n

10. THAY \u0110\u1ed4I T\u00cdNH CH\u1ea4T \u0110\u1ea4T D\u01af\u1edaI R\u1eeaNG TR\u1ed2NG CAO SU TR\u00caN \u0110\u1ea4T D\u1ed0C T\u1ea0I H\u01af\u01a0NG KH\u00ca – H\u00c0 T\u0128NH, VI\u1ec6T NAM<\/b><\/p>\n

L\u00ea B\u00e1 Th\u01b0\u1edfng, Ph\u1ea1m V\u0103n \u0110i\u1ec3n, \u0110\u1ed7 Anh Tu\u00e2n<\/b><\/p>\n

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

Ph\u00e1t tri\u1ec3n r\u1eebng tr\u1ed3ng Cao su tr\u00ean \u0111\u1ea5t d\u1ed1c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn suy tho\u00e1i \u0111\u1ea5t m\u00e0 nguy\u00ean nh\u00e2n ch\u1ee7 y\u1ebfu l\u00e0 l\u00e0m gi\u1ea3m t\u1ec9 l\u1ec7 che ph\u1ee7 b\u1ec1 m\u1eb7t \u0111\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 th\u1ef1c v\u1eadt, \u0111\u1eb7c bi\u1ec7t l\u00e0 giai \u0111o\u1ea1n chu\u1ea9n b\u1ecb \u0111\u1ea5t v\u00e0 khi r\u1eebng c\u00f2n non. T\u00e1c gi\u1ea3 \u0111\u00e3 ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u s\u1ef1 thay \u0111\u1ed5i t\u00ednh ch\u1ea5t \u0111\u1ea5t d\u01b0\u1edbi r\u1eebng tr\u1ed3ng Cao su tr\u00ean \u0111\u1ea5t d\u1ed1c t\u1ea1i H\u01b0\u01a1ng Kh\u00ea- H\u00e0 T\u0129nh trong 6 n\u0103m \u0111\u1ea7u chu k\u00ec kinh doanh r\u1eebng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y CEC, h\u00e0m l\u01b0\u1ee3ng m\u00f9n, h\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m, l\u00e2n v\u00e0 kali t\u1ed5ng s\u1ed1 gi\u1ea3m m\u1ea1nh trong hai n\u0103m \u0111\u1ea7u, \u0111\u1eb7c bi\u1ec7t t\u1ea1i nh\u1eefng n\u01a1i c\u00f3 \u0111\u1ed9 d\u1ed1c cao. Xu h\u01b0\u1edbng ph\u1ee5c h\u1ed3i c\u00e1c t\u00ednh ch\u1ea5t tr\u00ean c\u1ee7a \u0111\u1ea5t xu\u1ea5t hi\u1ec7n trong giai \u0111o\u1ea1n t\u1eeb n\u0103m th\u1ee9 3 \u0111\u1ebfn n\u0103m th\u1ee9 6, tuy nhi\u00ean v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1eadm. C\u00e1c t\u00ednh ch\u1ea5t kh\u00e1c c\u1ee7a \u0111\u1ea5t nh\u01b0 dung tr\u1ecdng, \u0111\u1ed9 chua, \u0111\u1ed9 no baz\u01a1, h\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m, l\u00e2n v\u00e0 kali d\u1ec5 ti\u00eau t\u0103ng m\u1ea1nh trong hai n\u0103m \u0111\u1ea7u. Tuy nhi\u00ean, s\u1ef1 gia t\u0103ng n\u00e0y l\u00e0 kh\u00f4ng b\u1ec1n v\u1eefng. Ng\u01b0\u1ee3c l\u1ea1i, ch\u00fang c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m nh\u1eb9 trong giai \u0111o\u1ea1n t\u1eeb n\u0103m th\u1ee9 3 \u0111\u1ebfn n\u0103m th\u1ee9 6. Nguy c\u01a1 suy tho\u00e1i \u0111\u1ea5t \u1edf c\u00e1c t\u00ednh ch\u1ea5t n\u00e0y r\u1ea5t r\u00f5 r\u00e0ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong giai \u0111o\u1ea1n khai th\u00e1c m\u1ee7 s\u1eafp t\u1edbi. Ph\u01b0\u01a1ng ph\u00e1p l\u00e0m \u0111\u1ea5t b\u1eb1ng ph\u00e1t \u0111\u1ed1t to\u00e0n di\u1ec7n, ch\u1ebf \u0111\u1ed9 b\u00f3n ph\u00e2n ch\u01b0a ph\u00f9 h\u1ee3p, l\u01b0\u1ee3ng m\u01b0a l\u1edbn t\u1eadp trung theo m\u00f9a v\u00e0 \u0111\u1ed9 d\u1ed1c l\u1edbn l\u00e0 nh\u1eefng nguy\u00ean nh\u00e2n ch\u00ednh d\u1eabn t\u1edbi s\u1ef1 thay \u0111\u1ed5i ti\u00eau c\u1ef1c c\u1ee7a \u0111\u1ea5t tr\u00ean khu v\u1ef1c nghi\u00ean c\u1ee9u. Kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p chu\u1ea9n b\u1ecb \u0111\u1ea5t b\u1eb1ng ph\u00e1t \u0111\u1ed1t to\u00e0n di\u1ec7n tr\u00ean \u0111\u1ea5t d\u1ed1c, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u1ea5p \u0111\u1ed9 d\u1ed1c l\u1edbn h\u01a1n 25o. N\u00ean nghi\u00ean c\u1ee9u ch\u1ebf \u0111\u1ed9 b\u00f3n ph\u00e2n h\u1ee3p l\u00fd h\u01a1n (kh\u00f4ng ch\u1ec9 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a c\u00e2y tr\u1ed3ng theo th\u1eddi gian m\u00e0 c\u00f2n b\u00f9 \u0111\u1eafp \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng hao h\u1ee5t dinh d\u01b0\u1ee1ng \u0111\u1ea5t do x\u00f3i m\u00f2n v\u00e0 r\u1eeda tr\u00f4i) l\u00e0 nh\u1eefng h\u01b0\u1edbng \u0111i c\u1ea7n thi\u1ebft nh\u1eb1m ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng c\u00e2y Cao su tr\u00ean c\u00e1c v\u00f9ng \u0111\u1ea5t d\u1ed1c.<\/p>\n

T\u1eeb kh\u00f3a<\/i><\/b>: <\/i>Cao su, \u0111\u1ea5t, \u0111\u1ea5t d\u1ed1c, suy tho\u00e1i \u0111\u1ea5t, t\u00ednh ch\u1ea5t \u0111\u1ea5t<\/p>\n

 <\/p>\n

Changes of soil properties induced by Rubber (<\/b>Hevea brasiliensis<\/i><\/b>) plantation establishment: A case study in Huong Khe, Ha Tinh, Vietnam<\/b><\/p>\n

Rubber plantation establishment on sloping areas can cause land degradation due to low ground cover, especially in the site preparation and young plantation stages. We exanimated whether soils under a rubber plantation were degraded and what are the factors causing the change in soil properties. The results showed a great decrease of CEC, OC, TN, TP and TK for the first 2 years, especially on highly slope area. However, there was a trend of restoring these soil properties since year 2 onward but it was slow. The value of pH, BS, \uf02b 4 NH , available phosphate and available potassium has increased strongly in first 2 years but the increases were not stable. They decreased slightly on 2 – 6 year period. The potential degradation of soil in pH, BS, \uf02b 4 NH , available phosphate and K-a are foreseeable in continuing years, especially on the latex tapping periods. The negative influences on soil properties were due to slash and burn, unsuitable fertilizer regime, high rainfall and steep slope. Slash and burn should not be<\/p>\n

applied on sloping areas, especially on lager slope 25o areas. More efficient fertilizer regime for sloping land which either meets nutrient demands of trees or compensates lost nutrient by leaching and erosion could be good solutions to develop rubber plantation sustainably on sloping land.<\/p>\n

Keywords: <\/i><\/b>Soil, sloping soil, soil degradation, soil properties, ruber<\/p>\n

 <\/p>\n

11. K\u1ebeT QU\u1ea2 T\u00cdNH TO\u00c1N B\u1ea2O \u00d4N V\u1ece L\u00d2 S\u1ea4Y G\u1ed6 NHI\u1ec6T \u0110\u1ed8 CAO<\/b><\/p>\n

Nguy\u1ec5n C\u1ea3nh M\u00e3o1, B\u00f9i Duy Ng\u1ecdc2 <\/b><\/p>\n

1 C\u00f4ng ty c\u1ed5 ph\u1ea7n Ch\u01b0\u01a1ng D\u01b0\u01a1ng 2 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><\/b><\/p>\n\n\n\n
L\u00f2 s\u1ea5y g\u1ed7 c\u00f3 v\u1ecf l\u00f2 v\u1edbi k\u1ebft c\u1ea5u 4 l\u1edbp bao g\u1ed3m: l\u1edbp 1 b\u1eb1ng inox 304 d\u00e0y 3,0mm; l\u1edbp 2 b\u1eb1ng b\u00f4ng khoa\u0301ng (rockwool); l\u1edbp 3 b\u1eb1ng polyurethane (PU); l\u1edbp 4 b\u1eb1ng t\u00f4n nh\u00f4m ke\u0303m da\u0300y 0,75mm. Theo t\u00ednh to\u00e1n l\u1edbp 2 l\u00e0m b\u1eb1ng b\u00f4ng kho\u00e1ng (rockwool) c\u00f3 chi\u1ec1u d\u00e0y S1 = 80mm. L\u1edbp 3 l\u00e0 l\u1edbp x\u1ed1p polyurethane (PU) c\u00f3 chi\u1ec1u d\u00e0y S2 = 45mm. V\u1edbi l\u00f2 s\u1ea5y g\u1ed7 theo thi\u1ebft k\u1ebf v\u00e0 t\u00ednh to\u00e1n nh\u01b0 \u0111\u00e3 n\u00eau cho phe\u0301p duy tri\u0300 ch\u00ea\u0301 \u0111\u00f4\u0323 s\u00e2\u0301y v\u01a1\u0301i nhi\u00ea\u0323t \u0111\u00f4\u0323 T0 = 100 \u00f7 150oC, EMC \u2264 16%.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eeb kh\u00f3a: <\/i>B\u1ea3o \u00f4n, l\u00f2 s\u1ea5y g\u1ed7 nhi\u1ec7t \u0111\u1ed9 cao<\/p>\n

 <\/p>\n

Results on cacultion of heat insulation of outer casing of high temperature drying oven<\/b><\/p>\n

Outer casing of drying oven consists of 4 layers: the first layer was made of inox 304 with thickness of 3.0mm; the second one is rockwool; the third one is polyurethane (PU) and the last one is steel sheet with thickness of 0.75mm. As for calculation results, the second layer is rockwool with thickness of S1 = 80mm. The third layer is polyurethane (PU) with the thickness of S2 = 45mm. With the design and calculation as mentioned above, drying oven can maintain drying temperature at T0 = 100\u00f7150oC and Equilibrium Moisture Content (EMC) \u2264 16%.<\/p>\n

Keywords: <\/i><\/b>Heat insulation, high temperature drying oven<\/p>\n

 <\/p>\n

 <\/p>\n

12. X\u00c5Y D\u1ef0NG N\u00d4NG TH\u00d4N M\u1edaI – G\u00d2C NH\u00ccN T\u1eea VAI TR\u00d2 C\u1ee6A PH\u1ee4 N\u1eee NAM \u0110\u1ecaNH TRONG PH\u00c1T TRI\u1ec2N KINH T\u1ebe<\/b><\/p>\n

L\u00ea Th\u1ecb Tuy\u1ebft Anh1, Nguy\u1ec5n Th\u1ecb Xuy\u1ebfn2 <\/b><\/p>\n

1Trung t\u00e2m Nghi\u00ean c\u1ee9u Kinh t\u1ebf L\u00e2m nghi\u1ec7p, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam, 2Ph\u00f2ng Qu\u1ea3n l\u00fd Khoa h\u1ecdc, S\u1edf Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 t\u1ec9nh Nam \u0110\u1ecbnh<\/i><\/p>\n\n\n\n
B\u00e0i b\u00e1o n\u00e0y t\u00f3m t\u1eaft c\u00e1c k\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 v\u1ec1 vai tr\u00f2 c\u1ee7a ph\u1ee5 n\u1eef t\u1edbi ph\u00e1t tri\u1ec3n kinh t\u1ebf trong ch\u01b0\u01a1ng tr\u00ecnh n\u00f4ng th\u00f4n m\u1edbi (NTM) c\u1ee7a t\u1ec9nh Nam \u0110\u1ecbnh, th\u00f4ng qua vi\u1ec7c \u0111\u00e1nh gi\u00e1 th\u1ef1c tr\u1ea1ng v\u1ec1 m\u1ee9c \u0111\u1ed9 tham gia s\u1ea3n xu\u1ea5t c\u1ee7a n\u00f4ng th\u00f4n; vai tr\u00f2 c\u1ee7a h\u1ecd trong ph\u00e1t tri\u1ec3n s\u1ea3n xu\u1ea5t n\u00f4ng nghi\u1ec7p, c\u00f4ng nghi\u1ec7p, th\u1ee7 c\u00f4ng nghi\u1ec7p v\u00e0 doanh nghi\u1ec7p v\u1eeba v\u00e0 nh\u1ecf. \u0110\u00e2y l\u00e0 nh\u1eefng k\u1ebft qu\u1ea3 quan tr\u1ecdng g\u00f3p ph\u1ea7n \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p n\u00e2ng cao vai tr\u00f2 c\u1ee7a ph\u1ee5 n\u1eef trong x\u00e2y d\u1ef1ng n\u00f4ng th\u00f4n m\u1edbi c\u1ee7a t\u1ec9nh. \u0110\u1ec3 \u0111\u1ea1t m\u1ee5c ti\u00eau \u0111\u1eb7t ra, nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh l\u00e0: K\u1ebf th\u1eeba t\u00e0i li\u1ec7u th\u1ee9 c\u1ea5p; \u0111i\u1ec1u tra x\u00e3 h\u1ed9i h\u1ecdc; ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, t\u1ed5ng h\u1ee3p v\u00e0 \u0111\u00e1nh gi\u00e1; h\u1ed9i th\u1ea3o v\u00e0 tham v\u1ea5n chuy\u00ean gia. Nghi\u00ean c\u1ee9u cho th\u1ea5y ng\u01b0\u1eddi ph\u1ee5 n\u1eef c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong ph\u00e1t tri\u1ec3n kinh t\u1ebf n\u00f4ng th\u00f4n (ph\u1ee5 n\u1eef chi\u1ebfm 51,37% t\u1ed5ng s\u1ed1 lao \u0111\u1ed9ng; tham gia tr\u1ed3ng tr\u1ecdt l\u00e0 40 – 64% v\u00e0 ch\u0103n nu\u00f4i 40 – 59%; \u0111\u00e0o t\u1ea1o ngh\u1ec1 l\u00e0 37,1%, trong \u0111\u00f3 ch\u1ee7 y\u1ebfu l\u00e0 \u0111\u00e0o t\u1ea1o d\u01b0\u1edbi 1 th\u00e1ng (59,6%); tr\u1ef1c ti\u1ebfp qu\u1ea3n l\u00fd s\u1ea3n xu\u1ea5t kinh doanh chi\u1ebfm t\u1ef7 l\u1ec7 th\u1ea5p (27,03%). Tuy nhi\u00ean, c\u00e1c ho\u1ea1t \u0111\u1ed9ng n\u00e0y c\u00f2n th\u1ec3 hi\u1ec7n s\u1ef1 b\u1ea5t b\u00ecnh \u0111\u1eb3ng gi\u1edbi v\u00e0 s\u1ef1 tham gia c\u1ee7a h\u1ecd l\u00e0 b\u1ecb \u0111\u1ed9ng v\u00e0 ch\u01b0a th\u1ec3 hi\u1ec7n s\u1ef1 b\u1ec1n v\u1eefng.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eeb kh\u00f3a: <\/i><\/b>Vai tr\u00f2 c\u1ee7a ph\u1ee5 n\u1eef, ph\u1ee5 n\u1eef Nam \u0110\u1ecbnh, ph\u00e1t tri\u1ec3n kinh t\u1ebf, n\u00f4ng th\u00f4n m\u1edbi<\/p>\n

 <\/p>\n

The reform rural construction – the observation from Nam Dinh women\u2019s roles in economic development<\/b><\/p>\n

This article sums up the results of the assessment of the women\u2019s roles about the economic development from the reform rural program in Nam Dinh province, through evaluation of actual state for the level of production women\u2019s participation in the rural areas; their roles in expansions of agriculture production, industry, handicraft and small and medium business. These were important products to contribute to propose the solutions to enhance the roles of women in the provincial reform rural construction. To archieve the objectives, the study used some main methods: collecting the secondary document; sociological survey; statistical analyzing, synthesizing and evaluating; holding workshops and experts\u2019 consultation. This research shows that women have an indispensable role in rural economic development (their rate of 51.37% of total labor; participating in cultivation from 40% to 64% and livestock from 40 – 59%; vocational training about 37.1%, in which mainly trained under one month (59.6%); directly managing business actions with the lower percentage (27.03%). Howerever, these activities still indicate the gender inequality and their participations are also passive and not sustainable.<\/p>\n

Keywords<\/i><\/b>: <\/b>Roles of women, women in Nam Dinh, economic development, reform rural area<\/p>\n

 <\/p>\n

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

\u00a0\u00a0 T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 2 – 2015 \u00a01. \u0110a d\u1ea1ng lo\u00e0i v\u00e0 chi h\u1ecd g\u1eebng \u1edf x\u00e3 B\u00ecnh Chu\u1ea9n, Nga My v\u00e0 Xi\u1ec1ng My thu\u1ed9c Khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean P\u00f9 Hu\u1ed1ng, Ngh\u1ec7 An V\u00f5 Minh S\u01a1n, Ph\u1ea1m H\u1ed3ng Ban, L\u00ea Th\u1ecb H\u01b0\u01a1ng Species and genus diversity of Zingiberaceae from Binh […]<\/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\/1461"}],"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=1461"}],"version-history":[{"count":6,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1461\/revisions"}],"predecessor-version":[{"id":1707,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1461\/revisions\/1707"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}