{"id":2208,"date":"2021-04-02T09:57:57","date_gmt":"2021-04-02T02:57:57","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2208"},"modified":"2023-11-23T12:24:52","modified_gmt":"2023-11-23T05:24:52","slug":"vietnam-journal-of-forest-science-number-1-2021","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2021\/04\/vietnam-journal-of-forest-science-number-1-2021\/","title":{"rendered":"Vietnam Journal of Forest Science Number 1-2021"},"content":{"rendered":"

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

<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 1<\/strong> – <\/strong>20<\/strong>21<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean (Dendrocalamus dienbienensis<\/em> H.N.Nguyen & V.T.Nguyen) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom
\nc\u00e0nh ch\u00e9t<\/td>\n		Research on propagation technique of of Dendrocalamus dienbienensis <\/em>H.N.Nguyen & V.T.Nguyen by shoot cutting method<\/td>\nNguy\u1ec5n Anh D\u0169ng
\nNguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t<\/em><\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u gi\u1ed1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng keo lai t\u1ea1i \u0110\u1ed3ng Ph\u00fa – B\u00ecnh Ph\u01b0\u1edbc<\/td>\nEffects of planting materials on tree growth, productivity and quality of the acacia hybrid plantation in
\nDong Phu – Binh Phuoc<\/td>\n		Tr\u1ea7n \u0110\u1ee9c Th\u00e0nh
\nV\u0169 \u0110\u00ecnh H\u01b0\u1edfng
\nNguy\u1ec5n V\u0103n \u0110\u0103ng
\nNguy\u1ec5n C\u01a1 Th\u00e0nh
\nNinh V\u0103n Tu\u1ea5n
\nPh\u1ea1m Th\u1ecb M\u1eadn
\nH\u1ed3 T\u1ed1 Vi\u1ec7t<\/em><\/td>\n		12<\/td>\n<\/tr>\n
3.<\/td>\n\u0110\u00e1nh gi\u00e1 th\u1ef1c tr\u1ea1ng chuy\u1ec3n h\u00f3a r\u1eebng tr\u1ed3ng g\u1ed7 nh\u1ecf th\u00e0nh r\u1eebng tr\u1ed3ng g\u1ed7 l\u1edbn t\u1ea1i t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf<\/td>\nAsesment of current status of transformation from small wood plantation to sawlog supply plantation in Thua Thien Hue province<\/td>\nPh\u1ea1m Ti\u1ebfn H\u00f9ng
\nD\u01b0\u01a1ng Quang Trung
\nT\u1ea1 Nh\u1eadt V\u01b0\u01a1ng
\nV\u00f5 \u0110\u1ea1i Nguy\u00ean<\/em><\/td>\n		24<\/td>\n<\/tr>\n
4.<\/td>\nKh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt th\u00e2n g\u1ed7 v\u00e0 l\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7 sau n\u01b0\u01a1ng r\u1eaby theo th\u1eddi gian \u1edf V\u01b0\u1eddn Qu\u1ed1c gia B\u1ebfn En<\/td>\nRecovery of tree species and non-timber forest products after shifting cultivation at Ben En National Park<\/td>\nNguy\u1ec5n V\u0103n Th\u1ecbnh
\nNguy\u1ec5n V\u0103n Th\u1eafng<\/em><\/td>\n		37<\/td>\n<\/tr>\n
5.<\/td>\nQu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng v\u00e0 ch\u1ee9ng ch\u1ec9 r\u1eebng \u1edf Vi\u1ec7t Nam nh\u1eefng c\u01a1 h\u1ed9i, th\u00e1ch th\u1ee9c v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p th\u00fac \u0111\u1ea9y<\/td>\nSustainable forest management and forest certification in Vietnam opportunities, challenges and solutions to promote<\/td>\n\u0110\u00e0o C\u00f4ng Khanh
\n\u0110\u00e0o L\u00ea Huy\u1ec1n Trang<\/em><\/td>\n		50<\/td>\n<\/tr>\n
6.<\/td>\nS\u1eed d\u1ee5ng \u1ea3nh v\u1ec7 tinh v\u00e0 GIS \u0111\u1ec3 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 hi\u1ec7n tr\u1ea1ng r\u1eebng t\u1ea1i Khu D\u1ef1 tr\u1eef sinh quy\u1ec3n th\u1ebf gi\u1edbi Qu\u1ea7n \u0111\u1ea3o C\u00e1t B\u00e0<\/td>\nApplication of satellite image and GIS to construct the current forest status map of the Cat Ba world biodiversity reserve<\/td>\nNguy\u1ec5n V\u0103n Tu\u1ea5n
\nL\u00ea H\u1ed3ng Li\u00ean
\nNguy\u1ec5n Huy Ho\u00e0ng
\nNinh Vi\u1ec7t Kh\u01b0\u01a1ng
\nTr\u1ecbnh Ng\u1ecdc Bon
\nHo\u00e0ng Thanh S\u01a1n
\nTr\u1ea7n Ho\u00e0ng Qu\u00fd
\n\u0110\u1eb7ng Th\u1ecb H\u1ea3i H\u00e0
\nPh\u00f9ng \u0110\u00ecnh Trung
\nTr\u1ea7n H\u1ea3i Long
\nTr\u1ea7n Cao Nguy\u00ean
\nPha\u0323m Ti\u00ea\u0301n Du\u0303ng
\nTr\u01b0\u01a1ng Tro\u0323ng Kh\u00f4i
\nTr\u1ea7n H\u1ed3ng V\u00e2n
\nTri\u1ec7u Th\u00e1i H\u01b0ng<\/em><\/td>\n		57<\/td>\n<\/tr>\n
7.<\/td>\nL\u1ea7n \u0111\u1ea7u ti\u00ean ghi nh\u1eadn s\u00e2u \u0103n l\u00e1 g\u00e2y h\u1ea1i c\u00e2y D\u1ea7u r\u00e1i v\u00e0 Sao \u0111en tr\u1ed3ng ph\u00e2n t\u00e1n t\u1ea1i \u0110\u00f4ng Nam B\u1ed9<\/td>\nFirst report of Antheraea frithi<\/em> damaging Dipterocarpus alatus<\/em> and Hopea odorata<\/em> in Southeast Vietnam<\/td>\n\u0110\u00e0o Ng\u1ecdc Quang
\nNguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u
\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t
\nNguy\u1ec5n Minh Ch\u00ed<\/em><\/td>\n		68<\/td>\n<\/tr>\n
8.<\/td>\nPh\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 kinh t\u1ebf m\u00f4 h\u00ecnh tr\u1ed3ng qu\u1ebf v\u00e0 th\u1ecb tr\u01b0\u1eddng ti\u00eau th\u1ee5 m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9n t\u1eeb c\u00e2y Qu\u1ebf t\u1ea1i huy\u1ec7n V\u0103n Y\u00ean, t\u1ec9nh Y\u00ean B\u00e1i<\/td>\nAnalyzing the economic efficiency and consumption markets of Cinnamon products in Van Yen district, Yen Bai province<\/td>\nNguy\u1ec5n Gia Ki\u00eam
\nD\u01b0\u01a1ng Qu\u1ef3nh Hoa
\nHo\u00e0ng Li\u00ean S\u01a1n
\nB\u00f9i Ng\u1ecdc Thu H\u00e0<\/em><\/td>\n		75<\/td>\n<\/tr>\n
9.<\/td>\nHi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng M\u1ed1i g\u00e2y h\u1ea1i c\u1ee7a g\u1ed7 D\u1ebb \u0111\u1ecf, B\u1eddi l\u1eddi v\u00e0ng sau x\u1eed l\u00fd b\u1ea3o qu\u1ea3n<\/td>\nDurability against termite Coptotermes formosanus<\/em> Shiraki of sawnwood of Lithocarpus ducampii<\/em> and veneer of Litsea pierrei <\/em>treated with preservatives<\/td>\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nHo\u00e0ng Th\u1ecb T\u00e1m
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc
\nNguy\u1ec5n Th\u1ecb H\u1eb1ng
\nB\u00f9i Th\u1ecb Th\u1ee7y
\nNguy\u1ec5n Duy V\u01b0\u1ee3ng<\/em><\/td>\n		86<\/td>\n<\/tr>\n
10.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a x\u1eed l\u00fd t\u1ea9y tr\u1eafng \u0111\u1ebfn sai m\u00e0u v\u00e0 t\u1ef7 l\u1ec7 lignin c\u1ee7a g\u1ed7 M\u1ee1 v\u00e0 g\u1ed7 B\u1ed3 \u0111\u1ec1 l\u00e0m v\u1eadt li\u1ec7u t\u1ea1o c\u1ed1t compozit g\u1ed7 Nh\u1ef1a th\u1ea5u quang<\/td>\nEffect of the bleaching treatment on the colour difference and lignin ratio of Manglietia conifera<\/em> and Styrax tonkinensis<\/em> wood used as base materials of transparent wood composites<\/td>\nNguy\u1ec5n Th\u1ecb Tr\u1ecbnh
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nNguy\u1ec5n Th\u1ecb H\u1eb1ng<\/em><\/td>\n		94<\/td>\n<\/tr>\n
11.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a t\u1ef7 l\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n nguy\u00ean li\u1ec7u \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng keo Melamine Urea Formaldehyde cho s\u1ea3n xu\u1ea5t v\u00e1n d\u00e1n ch\u1ed1ng \u1ea9m v\u00e0 th\u00e2n thi\u1ec7n m\u00f4i tr\u01b0\u1eddng<\/td>\nEffect of raw material ingredient ratio to the quality of Melamine Urea Formaldehyde adhesive for moisture resistance and eco-friendly plywood manufacturing<\/td>\nNguy\u1ec5n H\u1ed3ng Minh
\nTr\u1ea7n \u0110\u1ee9c Trung<\/em><\/td>\n		100<\/td>\n<\/tr>\n
12.<\/td>\nNghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 ch\u1ec9 ti\u00eau k\u00e9o b\u00e1m v\u00e0 l\u00e0m vi\u1ec7c c\u1ee7a li\u00ean h\u1ee3p m\u00e1y c\u00e0y ch\u0103m s\u00f3c r\u1eebng<\/td>\nExperimental study on the determination of traction-gripping capacity and working indicators of the forestry tractor Yanmar F535D<\/td>\n\u0110o\u00e0n V\u0103n Thu
\nNguy\u1ec5n Nh\u1eadt Chi\u00eau
\nT\u00f4 Qu\u1ed1c Huy<\/em><\/td>\n		111<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/a><\/p>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG B\u01af\u01a0NG L\u00d4NG \u0110I\u1ec6N BI\u00caN (Dendrocalamus dienbienensis <\/em>H.N.Nguyen & V.T.Nguyen)
\nB\u1eb0NG PH\u01af\u01a0NG PH\u00c1P GI\u00c2M HOM C\u00c0NH CH\u00c9T<\/p>\n

<\/a>Nguy\u1ec5n Anh D\u0169ng, Nguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t<\/p>\n

Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean l\u00e0 m\u1ed9t trong nh\u1eefng lo\u00e0i tre c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn, v\u00e1ch th\u00e2n d\u00e0y, c\u1ee9ng v\u00e0 b\u1ec1n, s\u1ea3n ph\u1ea9m t\u1eeb th\u00e2n tre lu\u1ed3ng \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 m\u00e1y ch\u1ebf bi\u1ebfn r\u1ea5t \u01b0a chu\u1ed9ng. Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom l\u00e0m c\u01a1 s\u1edf \u0111\u1ec3 x\u00e2y d\u1ef1ng h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt, t\u1ea1o ra gi\u1ed1ng t\u1ed1t, nhanh v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn cung c\u1ea5p nh\u00e2n r\u1ed9ng di\u1ec7n t\u00edch l\u00e0 th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y c\u00e2y m\u1eb9 B\u01b0\u01a1ng l\u00f4ng \u1edf tu\u1ed5i 2 v\u00e0 c\u1ea5p k\u00ednh > 12 – 20 cm c\u00f3 s\u1ed1 m\u1eaft ng\u1ee7 c\u00f3 tri\u1ec3n v\u1ecdng nh\u1ea5t (5,43 m\u1eaft ng\u1ee7\/c\u00e2y) v\u00e0 c\u00f3 s\u1ed1 c\u00e0nh ch\u00e9t c\u00f3 tri\u1ec3n v\u1ecdng nh\u1ea5t (2,93 c\u00e0nh ch\u00e9t\/c\u00e2y). T\u1ea1o c\u00e0nh ch\u00e9t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed1n ng\u1ecdn \u0111\u1ed1i v\u1edbi c\u00e2y m\u1eb9 tu\u1ed5i 2, c\u1ea5p k\u00ednh > 12 – 20 cm cho s\u1ed1 l\u01b0\u1ee3ng c\u00e0nh ch\u00e9t c\u00f3 th\u1ec3 l\u00e0m hom t\u1ed1t nh\u1ea5t (9,0 c\u00e0nh\/c\u00e2y),. \u0110\u1ed1i v\u1edbi ph\u01b0\u01a1ng ph\u00e1p ng\u1ea3 c\u00e2y c\u00f3 s\u1ed1 l\u01b0\u1ee3ng c\u00e0nh ch\u00e9t \u0111\u01b0\u1ee3c t\u1ea1o ra c\u00f3 tri\u1ec3n v\u1ecdng t\u1ed1t nh\u1ea5t v\u1edbi c\u00e2y m\u1eb9 tu\u1ed5i 2, c\u1ea5p k\u00ednh 6 – 12 cm (8,7 c\u00e0nh\/c\u00e2y). Nh\u00e2n gi\u1ed1ng b\u1eb1ng hom c\u00e0nh ch\u00e9t B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean v\u00e0o b\u1ea7u nilon s\u1eed d\u1ee5ng thu\u1ed1c k\u00edch th\u00edch IBA n\u1ed3ng \u0111\u1ed9 1.000ppm cho t\u1ef7 l\u1ec7 ra r\u1ec5 cao nh\u1ea5t (83,3%) v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1ec5 t\u1ed1t nh\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean, c\u00e0nh ch\u00e9t, nh\u00e2n gi\u1ed1ng<\/td>\n<\/tr>\n

\n

<\/a>Research on propagation technique of of Dendrocalamus dienbienensis<\/em> H.N.Nguyen & V.T.Nguyen by shoot cutting method<\/strong><\/p>\n

Dendrocalamus dienbienensis<\/em> is one of the bamboo species with large size, thick, hard and strong stem in Vietnam, it is very popular with the processing factories using products made from bamboo stem. Research on propagation by cuttings method as a basis for building technical guidelines, creating good breed, fast with large quantity to supply on large area is really necessary. The study results showed that 2 years old Dendrocalamus dienbienensis<\/em> mother tree and diameter level > 12 – 20 cm had the number of most promising knar (5.43 knar\/tree) and the most promising number of shoot (2.93 shoot\/tree). Creating shoot by cutting the tops of 2 years old mother trees, > 12 – 20 cm in diameter will give the best number of shoot (9.0 branches\/tree). For the reclining method, the number of shoot produced is also very promising at 2 years old mother tree, 6 – 12 cm (8.7 branches\/tree) in diameter. Propagating shoot of Dendrocalamus dienbienensis<\/em> into nilon bag using IBA stimulant at 1,000ppm concentration give the highest rooting rate (83.3%) and the best root quality.<\/p>\n

Keywords:<\/strong> Dendrocalamus dienbienensis<\/em>, <\/em>shoot, propagation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A C\u00c1C LO\u1ea0I V\u1eacT LI\u1ec6U GI\u1ed0NG \u0110\u1ebeN SINH TR\u01af\u1edeNG, N\u0102NG SU\u1ea4T V\u00c0 CH\u1ea4T L\u01af\u1ee2NG R\u1eeaNG TR\u1ed2NG KEO LAI
\nT\u1ea0I \u0110\u1ed2NG PH\u00da – B\u00ccNH PH\u01af\u1edaC<\/p>\n

<\/a>Tr\u1ea7n \u0110\u1ee9c Th\u00e0nh, V\u0169 \u0110\u00ecnh H\u01b0\u1edfng, Nguy\u1ec5n V\u0103n \u0110\u0103ng, Nguy\u1ec5n C\u01a1 Th\u00e0nh,
\nNinh V\u0103n Tu\u1ea5n, Ph\u1ea1m Th\u1ecb M\u1eadn, H\u1ed3 T\u1ed1 Vi\u1ec7t<\/p>\n

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

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m \u0111\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng t\u1eeb c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u gi\u1ed1ng tr\u1ed3ng r\u1eebng (c\u00e2y t\u1eeb nu\u00f4i c\u1ea5y m\u00f4 v\u00e0 c\u00e2y hom). Th\u00ed nghi\u1ec7m \u0111a nh\u00e2n t\u1ed1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i \u0110\u1ed3ng Ph\u00fa – B\u00ecnh Ph\u01b0\u1edbc, trong \u0111\u00f3 c\u00e2y hom t\u1eeb v\u01b0\u1eddn v\u1eadt li\u1ec7u tu\u1ed5i 2 v\u00e0 tu\u1ed5i 4 v\u00e0 t\u1eeb v\u1ecb tr\u00ed c\u1eaft hom kh\u00e1c nhau (v\u1ecb tr\u00ed h\u01b0\u1edbng d\u01b0\u01a1ng v\u00e0 v\u1ecb tr\u00ed c\u00e0nh) c\u1ee7a 2 d\u00f2ng keo lai AH7 v\u00e0 BV10. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u t\u1ea1i giai \u0111o\u1ea1n 36 th\u00e1ng tu\u1ed5i cho th\u1ea5y r\u1eebng tr\u1ed3ng keo lai c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb m\u00f4 v\u00e0 hom h\u01b0\u1edbng d\u01b0\u01a1ng c\u1ee7a v\u01b0\u1eddn v\u1eadt li\u1ec7u 2 tu\u1ed5i c\u00f3 c\u00f3 n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng v\u00e0 h\u00ecnh d\u00e1ng th\u00e2n l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau, kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh c\u1ee7a c\u00e2y m\u00f4 l\u00e0 t\u1ed1t h\u01a1n so v\u1edbi c\u00e2y hom; r\u1eebng tr\u1ed3ng keo lai t\u1eeb c\u00e2y hom v\u01b0\u1eddn v\u1eadt li\u1ec7u 2 tu\u1ed5i c\u00f3 n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng, h\u00ecnh d\u00e1ng th\u00e2n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh t\u1ed1t h\u01a1n so v\u1edbi r\u1eebng tr\u1ed3ng t\u1eeb c\u00e2y hom v\u01b0\u1eddn v\u1eadt li\u1ec7u 4 tu\u1ed5i; r\u1eebng tr\u1ed3ng keo lai t\u1eeb c\u00e2y hom v\u1ecb tr\u00ed h\u01b0\u1edbng d\u01b0\u01a1ng c\u00f3 n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng, h\u00ecnh d\u00e1ng th\u00e2n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh t\u1ed1t h\u01a1n so v\u1edbi r\u1eebng tr\u1ed3ng t\u1eeb c\u00e2y hom c\u00e0nh la; r\u1eebng tr\u1ed3ng keo lai d\u00f2ng BV10 c\u00f3 n\u0103ng su\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh t\u1ed1t h\u01a1n, c\u00f3 th\u00e2n cong h\u01a1n, s\u1ed1 l\u01b0\u1ee3ng c\u00e0nh \u0111\u01b0\u1eddng k\u00ednh \u2265 2 cm trong kho\u1ea3ng \u0111\u1ed9 cao 0 – 4 m v\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u00e0nh l\u00e0 cao h\u01a1n so v\u1edbi d\u00f2ng AH7. T\u1eeb k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y \u0111\u1ec3 ti\u1ebft ki\u1ec7m kinh ph\u00ed khi tr\u1ed3ng r\u1eebng keo lai tr\u00ean quy m\u00f4 l\u1edbn, c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u00e2y hom t\u1eeb v\u01b0\u1eddn v\u1eadt li\u1ec7u 2 tu\u1ed5i thay cho c\u00e2y m\u00f4, ch\u1ec9 s\u1eed d\u1ee5ng hom h\u01b0\u1edbng d\u01b0\u01a1ng v\u00e0 l\u1ea5y hom t\u1eeb v\u01b0\u1eddn v\u1eadt li\u1ec7u kh\u00f4ng qu\u00e1 3 tu\u1ed5i \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e2y gi\u1ed1ng tr\u1ed3ng r\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo lai, c\u00e2y hom, m\u00f4, n\u0103ng su\u1ea5t, sinh tr\u01b0\u1edfng<\/td>\n<\/tr>\n

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<\/a>Effects of planting materials on tree growth, productivity and quality of the acacia hybrid plantation in Dong Phu – Binh Phuoc<\/strong><\/p>\n

This study was conducted to understand the impact of planting materials (tissue culture plantlet and rooted cutting from different ages and cutting positions of hedge orchard) to tree growth, productivity and quality of the acacia hybrid plantation. A trial in Dong Phu – Binh Phuoc had a factorial combination of clones (AH1, BV10), tissue culture plantlet, rooted cutting from age two and age four years and cutting branche positions (sun-facing direction and horisontal direction). The early results showed that at 36 months after planting there were no significant differences between tissue culture plantlet, sun-facing direction rooted cutting from age two years in stand productivity and quality except disease tolerance of tissue culture plantlet was greater than rooted cutting. Rooted cutting from age two years of hedge orchard significantly increased tree growth, productivity and quality of plantations that compared to its four years of hedge orchard. Tree growth, productivity and quality of plantations by using sun-facing direction rooted cutting was significantly higher than that of using horisontal direction branches. Plantation productivity of clone BV10 was significantly greater than its clone AH7 but plantation quality of clone BV10 was significantly lower than AH7 due to number of diameter branches \u2265 2 cm in BV10 was higher than that of AH7. It suggests that when planting acacia hybrid with high scale we should use sun-facing direction rooted cutting from age two years of hedge orchard rather use tissue culture plantlet material and age of hedge orchards has no more than three years of age.<\/p>\n

Keywords:<\/em><\/strong> Rooted cutting, acacia hybrid, tissue culture plantlet, productivity, growths<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 TH\u1ef0C TR\u1ea0NG CHUY\u1ec2N H\u00d3A R\u1eeaNG TR\u1ed2NG G\u1ed6 NH\u1ece TH\u00c0NH R\u1eeaNG TR\u1ed2NG G\u1ed6 L\u1edaN T\u1ea0I T\u1ec8NH TH\u1eeaA THI\u00caN HU\u1ebe<\/p>\n

<\/a>Ph\u1ea1m Ti\u1ebfn H\u00f9ng1<\/sup>, D\u01b0\u01a1ng Quang Trung2<\/sup>, T\u1ea1 Nh\u1eadt V\u01b0\u01a1ng2<\/sup>, V\u00f5 \u0110\u1ea1i Nguy\u00ean3<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p B\u1eafc Trung B\u1ed9
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\n3<\/sup> Sinh vi\u00ean Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Chuy\u1ec3n h\u00f3a r\u1eebng tr\u1ed3ng g\u1ed7 nh\u1ecf th\u00e0nh r\u1eebng tr\u1ed3ng cung c\u1ea5p g\u1ed7 l\u1edbn l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ee7 tr\u01b0\u01a1ng v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt nh\u1eb1m \u0111\u00e1p \u1ee9ng nguy\u00ean li\u1ec7u g\u1ed7 l\u1edbn ph\u1ee5c v\u1ee5 cho ch\u1ebf bi\u1ebfn \u0111\u1ed3 m\u1ed9c. \u0110\u00e3 c\u00f3 6 v\u0103n b\u1ea3n h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt kh\u00e1 chi ti\u1ebft v\u1ec1 chuy\u1ec3n h\u00f3a r\u1eebng tr\u1ed3ng g\u1ed7 nh\u1ecf th\u00e0nh r\u1eebng tr\u1ed3ng cung c\u1ea5p g\u1ed7 l\u1edbn. Tuy nhi\u00ean, vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt chuy\u1ec3n h\u00f3a n\u00e0y t\u1ea1i t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf l\u1ea1i c\u00f3 m\u1ed9t s\u1ed1 \u0111i\u1ec3m r\u1ea5t kh\u00e1c bi\u1ec7t, \u0111\u1eb7c bi\u1ec7t l\u00e0 k\u1ef3 gi\u00e3n c\u00e1ch gi\u1eefa c\u00e1c l\u1ea7n t\u1ec9a th\u01b0a th\u01b0\u1eddng ch\u1ec9 l\u00e0 1 n\u0103m, c\u01b0\u1eddng \u0111\u1ed9 t\u1ec9a v\u00e0 m\u1eadt \u0111\u1ed9 \u0111\u1ec3 l\u1ea1i qua c\u00e1c l\u1ea7n t\u1ec9a th\u01b0a c\u0169ng r\u1ea5t kh\u00e1c nhau. R\u1eebng tr\u1ed3ng chuy\u1ec3n h\u00f3a \u1edf t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf \u0111\u01b0\u1ee3c tri\u1ec3n khai tr\u00ean \u0111\u1ecba b\u00e0n 6 huy\u1ec7n v\u00e0 th\u1ecb x\u00e3. T\u00ednh t\u1edbi n\u0103m 2020, to\u00e0n t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf \u0111\u00e3 c\u00f3 3.873,5 ha r\u1eebng tr\u1ed3ng keo chuy\u1ec3n h\u00f3a, t\u1eadp trung \u1edf \u0111\u1ed9 tu\u1ed5i 4 – 6 (chi\u1ebfm 46,4%). K\u1ebft qu\u1ea3 b\u01b0\u1edbc \u0111\u1ea7u cho th\u1ea5y r\u1eebng tr\u1ed3ng chuy\u1ec3n h\u00f3a c\u00f3 t\u1ed1c \u0111\u1ed9 sinh tr\u01b0\u1edfng nhanh v\u00e0 c\u00f3 th\u1ec3 t\u1ea1o ra g\u1ed7 l\u1edbn ph\u1ee5c v\u1ee5 cho c\u00f4ng nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> R\u1eebng tr\u1ed3ng, g\u1ed7 nh\u1ecf, g\u1ed7 l\u1edbn, chuy\u1ec3n h\u00f3a r\u1eebng, Th\u1eeba Thi\u00ean Hu\u1ebf<\/td>\n<\/tr>\n

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<\/a>Asesment of current status of transformation from small wood plantation to sawlog supply plantation in Thua Thien Hue province<\/strong><\/p>\n

Transformation from small wood plantation to sawlog, supply plantation is one of the policies as well as technical measures to meet the demand of sawlogs for furniture processing in Vietnam. Threre are 6 legal documents on technical guidelines about transformation of small wood into sawlog supply plantation. However, application of these technical guidelines in Thua Thien Hue province has a number of different points, particularly duration between two nearest thinning is only one year, thinning intensity and plantation density to be maintained after thinning are quite different. Transferred forests in Thua Thien Hue province are distributed in 6 districts and towns. Total area of transferred forests in Thua Thien Hue in 2020 ia 3,873.5 ha, concentrated at ages 4 – 6 (accounting 46.4%). Preliminary results show that transferred forest has higher growth rate and can produce saw logs for wood processing industry.<\/p>\n

Keywords:<\/em><\/strong> Plantation, small wood, sawlogs, forest transformation, Thua Thien Hue province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>KH\u1ea2 N\u0102NG PH\u1ee4C H\u1ed2I C\u00c1C LO\u00c0I TH\u1ef0C V\u1eacT TH\u00c2N G\u1ed6\u00a0V\u00c0 L\u00c2M S\u1ea2N NGO\u00c0I G\u1ed6 SAU N\u01af\u01a0NG R\u1eaaY THEO TH\u1edcI GIAN
\n\u1ede V\u01af\u1edcN QU\u1ed0C GIA B\u1ebeN EN<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u1ecbnh1<\/sup>, Nguy\u1ec5n V\u0103n Th\u1eafng2<\/sup><\/p>\n

1 Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2V\u01b0\u1eddn Qu\u1ed1c gia B\u1ebfn En<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby l\u00e0 v\u1ea5n \u0111\u1ec1 \u0111\u00e3 \u0111\u01b0\u1ee3c nhi\u1ec1u t\u1ed5 ch\u1ee9c qu\u1ed1c t\u1ebf c\u0169ng nh\u01b0 trong n\u01b0\u1edbc quan t\u00e2m. \u0110\u1eb7c bi\u1ec7t, trong V\u01b0\u1eddn Qu\u1ed1c gia B\u1ebfn En c\u00f3 s\u1ef1 xen l\u1eabn m\u1ed9t s\u1ed1 khu v\u1ef1c d\u00e2n c\u01b0, n\u00ean vi\u1ec7c canh t\u00e1c n\u01b0\u01a1ng r\u1eaby \u0111\u00e3 t\u1ed3n t\u1ea1i nhi\u1ec1u n\u0103m tr\u01b0\u1edbc \u0111\u00e2y, di\u1ec7n t\u00edch n\u01b0\u01a1ng r\u1eaby b\u1ecf h\u00f3a c\u0169ng t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn. V\u00ec v\u1eady, vi\u1ec7c \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i c\u0169ng nh\u01b0 t\u00ednh \u0111a d\u1ea1ng c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 v\u00e0 l\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7 sau c\u00e1c giai \u0111o\u1ea1n b\u1ecf h\u00f3a l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. Trong ph\u1ea1m vi nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 ti\u1ebfn h\u00e0nh \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby b\u1ecf h\u00f3a theo 3 giai \u0111o\u1ea1n: 14 – 15 n\u0103m; 19 – 20 n\u0103m v\u00e0 24 – 25 n\u0103m. K\u1ebft qu\u1ea3 cho th\u1ea5y t\u1ed5 th\u00e0nh c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 \u1edf t\u1ea7ng cao ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby t\u0103ng l\u00ean theo th\u1eddi gian kh\u00e1 r\u00f5, giai \u0111o\u1ea1n 14 – 15 n\u0103m c\u00f3 58 lo\u00e0i, \u1edf giai \u0111o\u1ea1n 19 – 20 n\u0103m c\u00f3 80 lo\u00e0i v\u00e0 giai \u0111o\u1ea1n 24 – 25 n\u0103m c\u00f3 105 lo\u00e0i, t\u1ed5ng 3 giai \u0111o\u1ea1n ph\u1ee5c h\u1ed3i c\u00f3 164 lo\u00e0i. Trong \u0111\u00f3, \u0111\u00e3 xu\u1ea5t hi\u1ec7n 38 lo\u00e0i c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p l\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7, bao g\u1ed3m 26 lo\u00e0i s\u1eed d\u1ee5ng qu\u1ea3 v\u00e0 12 lo\u00e0i s\u1eed d\u1ee5ng l\u00e1. \u0110\u1eb7c bi\u1ec7t, V\u00f9 h\u01b0\u01a1ng l\u00e0 lo\u00e0i duy nh\u1ea5t c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a c\u00e2y \u0111\u1ec3 ch\u01b0ng c\u1ea5t tinh d\u1ea7u. Ph\u1ea7n l\u1edbn c\u00e1c lo\u00e0i (117 lo\u00e0i) c\u00f3 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7 \u0111\u1ec3 \u0111\u00f3ng \u0111\u1ed3 gia d\u1ee5ng, 23 lo\u00e0i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a c\u00e2y \u0111\u1ec3 l\u00e0m gia v\u1ecb, 3 lo\u00e0i c\u00e2y c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u00e0m thu\u1ed1c v\u00e0 ch\u1ec9 1 lo\u00e0i cho tinh d\u1ea7u. S\u1ed1 l\u01b0\u1ee3ng lo\u00e0i c\u00e2y t\u00e1i sinh c\u0169ng t\u0103ng l\u00ean kh\u00e1 r\u00f5 r\u1ec7t \u1edf 2 giai \u0111o\u1ea1n \u0111\u1ea7u, trong \u0111\u00f3 giai \u0111o\u1ea1n 14 – 15 n\u0103m c\u00f3 55 lo\u00e0i, giai \u0111o\u1ea1n 19 – 20 n\u0103m \u0111\u00e3 t\u0103ng l\u00ean t\u1edbi 95 lo\u00e0i v\u00e0 giai \u0111o\u1ea1n 24 – 25 n\u0103m ch\u1ec9 c\u00f3 85 lo\u00e0i. T\u1ed5ng s\u1ed1 lo\u00e0i c\u00e2y t\u00e1i sinh \u1edf c\u1ea3 3 giai \u0111o\u1ea1n l\u00e0 144 lo\u00e0i. Trong \u0111\u00f3, c\u00f3 m\u1ed9t s\u1ed1 lo\u00e0i \u01b0a s\u00e1ng \u0111\u00e3 kh\u00f4ng c\u00f2n xu\u1ea5t hi\u1ec7n \u1edf giai \u0111o\u1ea1n 24 – 25 n\u0103m, nhi\u1ec1u lo\u00e0i c\u00e2y ch\u1ecbu b\u00f3ng v\u00e0 \u01b0a b\u00f3ng \u0111\u00e3 b\u1eaft \u0111\u1ea7u xu\u1ea5t hi\u1ec7n. Trong s\u1ed1 c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 t\u00e1i sinh n\u00f3i tr\u00ean c\u0169ng c\u00f3 t\u1edbi 30 lo\u00e0i c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p c\u00e1c lo\u1ea1i l\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7, g\u1ed3m 4 lo\u00e0i c\u00e2y cho s\u1ea3n ph\u1ea9m l\u00e0m d\u01b0\u1ee3c li\u1ec7u, 5 lo\u00e0i c\u00e2y cho s\u1ea3n ph\u1ea9m nh\u1ef1a, 6 lo\u00e0i c\u00e2y cho s\u1ea3n ph\u1ea9m l\u00e0m h\u01b0\u01a1ng li\u1ec7u, c\u00f2n l\u1ea1i l\u00e0 cung c\u1ea5p c\u00e1c s\u1ea3n ph\u1ea9m l\u00e0m gia v\u1ecb v\u00e0 th\u1ef1c ph\u1ea9m. B\u1ed9 ph\u1eadn s\u1eed d\u1ee5ng c\u0169ng r\u1ea5t \u0111a d\u1ea1ng nh\u01b0 th\u00e2n, l\u00e1, v\u1ecf, qu\u1ea3 v\u00e0 h\u1ea1t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110a d\u1ea1ng t\u1ed5 th\u00e0nh lo\u00e0i c\u00e2y g\u1ed7 v\u00e0 l\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7, ph\u1ee5c h\u1ed3i r\u1eebng sau canh t\u00e1c n\u01b0\u01a1ng r\u1eaby, V\u01b0\u1eddn Qu\u1ed1c gia B\u1ebfn En<\/td>\n<\/tr>\n

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<\/a>Recovery of tree species and non-timber forest products after shifting cultivation at Ben En National Park<\/strong><\/p>\n

Forest recovery after shifting cultivation is an issue that has been concerned by many international and national organizations. In Ben En National Park, there are residential areas living in the park, so the shifting cultivation has existed many years ago and the fallow area is also relatively large. Therefore, it is essential to assess the recovery and diversity of timber tree species and NTFPs after fallow periods. In the scope of this project, the ability to recover forests after slash-and-burn fallow has been conducted in 3 phases: 14 – 15 years; 19 – 20 years and 24 – 25 years. The results show that the composition of tree species incresed the number of timber species, after the fallow of 14 – 15 years, the number of tree species was 58 species, 80 species were counted after 19 – 20 years and period 24 -25 years with 105 species. In total 164 species were found, of which, there have been 38 species providing non-timber forest products, including 26 species using fruit and 12 species using leaves. In particular, the Cinamomum blansae<\/em> is the only species that can use all parts to distill the essential oil. The majority of species (117 species) can use their wood for making household appliances, 23 species can use their parts for spice, 3 species can be used for medicine and only 1 species for oil. The number of regenerated tree species has also increased significantly in the first 2 stages, of which there are 55 species counted in the 14 – 15 year period, in which 95 species were found in the 19 – 20 year period. The total number of regenerated tree species in all 3 stages was 144 species. In particular, there are some light demanding species that no longer appear in the 24 – 25 year period, many shade tolerant and shade-tolerant plants have begun to appear. Among regenerated tree species, there are also up to 30 species providing non-timber forest products, including 4 species for medicinal products, 5 species for resin, 6 species for products of flavoring, the rest is to provide products for spices and food. Used parts of tree regeneration are also remarkably diverse such as stem, leaf, bark, fruit and seed.<\/p>\n

Keywords:<\/em><\/strong> Diversity of tree species composition and NTFPs, shifting cultivation, Ben En National Park<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>QU\u1ea2N L\u00dd R\u1eeaNG B\u1ec0N V\u1eeeNG V\u00c0 CH\u1ee8NG CH\u1ec8 R\u1eeaNG \u1ede VI\u1ec6T NAM NH\u1eeeNG C\u01a0 H\u1ed8I, TH\u00c1CH TH\u1ee8C V\u00c0 C\u00c1C GI\u1ea2I PH\u00c1P TH\u00daC \u0110\u1ea8Y<\/p>\n

<\/a>\u0110\u00e0o C\u00f4ng Khanh1<\/sup>, \u0110\u00e0o L\u00ea Huy\u1ec1n Trang2<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng v\u00e0 Ch\u1ee9ng ch\u1ec9 r\u1eebng
\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

Vi\u1ec7t Nam tham gia ti\u1ebfn tr\u00ecnh qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng (QLRBV) v\u00e0 ch\u1ee9ng ch\u1ec9 r\u1eebng t\u1eeb n\u0103m 1998, tuy nhi\u00ean cho \u0111\u1ebfn th\u00e1ng 12 n\u0103m 2020 m\u1edbi ch\u1ec9 c\u00f3 g\u1ea7n 220.000 ha r\u1eebng c\u1ee7a 49 ch\u1ee7 r\u1eebng \u0111\u01b0\u1ee3c c\u1ea5p ch\u1ee9ng ch\u1ec9 FM. S\u1edf d\u0129 ti\u1ebfn tr\u00ecnh n\u00e0y c\u00f2n qu\u00e1 ch\u1eadm so v\u1edbi ti\u1ec1m n\u0103ng t\u00e0i nguy\u00ean r\u1eebng c\u1ee7a Vi\u1ec7t Nam b\u1edfi v\u00ec b\u00ean c\u1ea1nh nh\u1eefng c\u01a1 h\u1ed9i cho ti\u1ebfn tr\u00ecnh n\u00e0y, th\u00ec c\u0169ng kh\u00f4ng \u00edt kh\u00f3 kh\u0103n, th\u00e1ch th\u1ee9c \u0111\u1eb7t ra \u0111\u1ed1i v\u1edbi ng\u00e0nh l\u00e2m nghi\u1ec7p Vi\u1ec7t Nam: Nh\u1eadn th\u1ee9c v\u00e0 n\u0103ng l\u1ef1c, c\u01a1 ch\u1ebf ch\u00ednh s\u00e1ch, t\u00e0i ch\u00ednh, k\u1ef9 thu\u1eadt… V\u00ec v\u1eady, ng\u00e0nh l\u00e2m nghi\u1ec7p Vi\u1ec7t Nam r\u1ea5t c\u1ea7n c\u00f3 nh\u1eefng gi\u1ea3i ph\u00e1p t\u1ed5ng h\u1ee3p, \u0111\u1ed3ng b\u1ed9 nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau m\u00e0 Chi\u1ebfn l\u01b0\u1ee3c c\u1ee7a ng\u00e0nh \u0111\u00e3 \u0111\u1eb7t ra l\u00e0 ph\u1ea3i QLRBV, bao g\u1ed3m c\u00e1c gi\u1ea3i ph\u00e1p t\u00e0i ch\u00ednh, k\u1ef9 thu\u1eadt v\u00e0 t\u1ed5 ch\u1ee9c, \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u1ec7 th\u1ed1ng ch\u00ednh s\u00e1ch li\u00ean quan \u0111\u1ebfn QLRBV v\u00e0 ch\u1ee9ng ch\u1ec9 r\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng<\/td>\n<\/tr>\n

\n

<\/a>Sustainable forest management and forest certification in Vietnam opportunities, challenges and solutions to promote<\/strong><\/p>\n

Vietnam has been involved in the process of sustainable forest management and forest certification since 1998, but until December 2020, only nearly 220,000 ha of forests from 49 forest owners have been certified with FM. The reason for this process is still too slow compared to the potential of Vietnam’s forest resources, because besides the opportunities for this process, there are many difficulties and challenges facing the forestry sector in Vietnam: awareness and capacity, policy mechanisms, finance, technology… Therefore, the forestry sector in Vietnam needs to have integrated and synchronized solutions to achieve the goals set by the sector strategy, which is to ensure sustainable forest management, including financial, technical and organizational solutions, especially policy systems related to sustainable forest management and certification.<\/p>\n

Keywords:<\/em><\/strong> Sustainable forest management<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>S\u1eec D\u1ee4NG \u1ea2NH V\u1ec6 TINH V\u00c0 GIS\u00a0\u0110\u1ec2 X\u00c2Y D\u1ef0NG B\u1ea2N \u0110\u1ed2 HI\u1ec6N TR\u1ea0NG R\u1eeaNG
\nT\u1ea0I KHU D\u1ef0 TR\u1eee SINH QUY\u1ec2N TH\u1ebe GI\u1edaI QU\u1ea6N \u0110\u1ea2O C\u00c1T B\u00c0<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Tu\u1ea5n1<\/sup>, L\u00ea H\u1ed3ng Li\u00ean2<\/sup>, Nguy\u1ec5n Huy Ho\u00e0ng1<\/sup>, Ninh Vi\u1ec7t Kh\u01b0\u01a1ng1<\/sup>,
\nTr\u1ecbnh Ng\u1ecdc Bon1<\/sup>, Ho\u00e0ng Thanh S\u01a1n1<\/sup>, Tr\u1ea7n Ho\u00e0ng Qu\u00fd1<\/sup>, \u0110\u1eb7ng Th\u1ecb H\u1ea3i H\u00e01<\/sup>,
\nPh\u00f9ng \u0110\u00ecnh Trung1,<\/sup> Tr\u1ea7n H\u1ea3i Long1<\/sup>, Tr\u1ea7n Cao Nguy\u00ean1<\/sup>, Pha\u0323m Ti\u00ea\u0301n Du\u0303ng1<\/sup>,
\nTr\u01b0\u01a1ng Tro\u0323ng Kh\u00f4i1<\/sup>, Tr\u1ea7n H\u1ed3ng V\u00e2n1<\/sup>, Tri\u1ec7u Th\u00e1i H\u01b0ng1<\/sup>,<\/p>\n

1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u01af\u0301ng du\u0323ng c\u00f4ng ngh\u00ea\u0323 vi\u00ea\u0303n tha\u0301m (ph\u00e2n ti\u0301ch a\u0309nh v\u00ea\u0323 tinh) va\u0300 h\u00ea\u0323 th\u00f4\u0301ng th\u00f4ng tin \u0111i\u0323a ly\u0301 (GIS) trong vi\u00ea\u0323c \u0111a\u0301nh gia\u0301 va\u0300 qua\u0309n ly\u0301 ta\u0300i nguy\u00ean r\u01b0\u0300ng, \u0111\u0103\u0323c bi\u00ea\u0323t la\u0300 vi\u00ea\u0323c x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 hi\u1ec7n tr\u1ea1ng t\u00e0i nguy\u00ean r\u1eebng ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn \u1edf Vi\u1ec7t Nam. Ba\u0300i ba\u0301o na\u0300y tri\u0300nh ba\u0300y k\u00ea\u0301t qua\u0309 vi\u00ea\u0323c s\u01b0\u0309 d\u1ee5ng \u1ea3nh Landsat 8, \u1ea3nh Google Earth v\u00e0 k\u1ebft qu\u1ea3 \u0111i\u1ec1u tra th\u1ef1c \u0111\u1ecba \u0111\u1ec3 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 hi\u1ec7n tr\u1ea1ng t\u00e0i nguy\u00ean r\u1eebng n\u0103m 2020 t\u1ea1i Khu d\u1eef tr\u1eef sinh quy\u1ec3n th\u00ea\u0301 gi\u01a1\u0301i qu\u1ea7n \u0111\u1ea3o C\u00e1t B\u00e0. Ph\u00e2n t\u00edch \u1ea3nh Landsat 8 b\u0103\u0300ng ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n lo\u1ea1i t\u1ef1 \u0111\u1ed9ng v\u1edbi ph\u1ea7n m\u1ec1m eCognition Developer \u0111\u1ec3 ph\u00e2n t\u00e1ch ra c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau, sau \u0111\u00f3 s\u1eed d\u1ee5ng \u1ea3nh Google Earth c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao \u0111\u1ec3 r\u00e0 so\u00e1t, hi\u1ec7u ch\u1ec9nh, v\u00e0 b\u1ed5 sung hi\u1ec7n tr\u1ea1ng. Nghi\u00ean c\u01b0\u0301u \u0111a\u0303 xa\u0301c \u0111i\u0323nh \u0111\u01b0\u01a1\u0323c t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng v\u00e0 c\u00e1c lo\u1ea1i \u0111\u1ea5t kh\u00e1c l\u00e0 20.462,38 ha ta\u0323i khu v\u01b0\u0323c nghi\u00ean c\u01b0\u0301u, trong \u0111\u00f3 di\u1ec7n t\u00edch c\u00f3 r\u1eebng l\u00e0 9.821,16 ha; di\u1ec7n t\u00edch \u0111\u1ea5t c\u00f3 c\u00e2y g\u1ed7 t\u00e1i sinh l\u00e0 4.661,2 ha; di\u1ec7n t\u00edch \u0111\u1ea5t tr\u1ed1ng l\u00e0 3.546,16 ha; di\u1ec7n t\u00edch \u0111\u1ea5t n\u00f4ng nghi\u1ec7p l\u00e0 424,18 ha; di\u1ec7n t\u00edch b\u00e3i c\u00e1t l\u00e0 53,47 ha; di\u1ec7n t\u00edch \u0111\u1ea5t kh\u00e1c l\u00e0 997,21 ha; di\u1ec7n t\u00edch m\u1eb7t n\u01b0\u1edbc l\u00e0 959,0 ha. Nghi\u00ean c\u01b0\u0301u na\u0300y cung c\u00e2\u0301p nh\u01b0\u0303ng d\u01b0\u0303 li\u00ea\u0323u v\u00ea\u0300 di\u00ea\u0323n ti\u0301ch ca\u0301c loa\u0323i \u0111\u00e2\u0301t, loa\u0323i r\u01b0\u0300ng theo tra\u0323ng tha\u0301i va\u0300 ba\u0309n \u0111\u00f4\u0300 hi\u00ea\u0323n tra\u0323ng ta\u0300i nguy\u00ean r\u01b0\u0300ng Khu d\u1eef tr\u1eef sinh quy\u1ec3n th\u00ea\u0301 gi\u01a1\u0301i qu\u1ea7n \u0111\u1ea3o C\u00e1t B\u00e0, gi\u00fap cho c\u00e1c \u0111\u01a1n v\u1ecb qu\u1ea3n l\u00fd c\u00f3 ngu\u1ed3n t\u00e0i li\u1ec7u kham kh\u1ea3o t\u1ed1t trong c\u00f4ng t\u00e1c \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng r\u1eebng, t\u1eeb \u0111\u00f3 \u0111\u1ec1 xu\u1ea5t ca\u0301c gia\u0309i pha\u0301p ba\u0309o v\u00ea\u0323, pha\u0301t tri\u00ea\u0309n ta\u0300i nguy\u00ean r\u01b0\u0300ng va\u0300 b\u1ea3o t\u1ed3n \u0111a d\u1ea1ng sinh h\u1ecdc.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> GIS, \u1ea3nh Landsat 8, \u1ea3nh Google Earth, hi\u00ea\u0323n tra\u0323ng r\u01b0\u0300ng, Ca\u0301t Ba\u0300<\/td>\n<\/tr>\n

\n

<\/a>Application of satellite image and gis to construct the current forest status map of the Cat Ba world biodiversity reserve<\/strong><\/p>\n

Application of remote sensing technology (satellite image analysis) and geographic information systems (GIS) in forest resource assessment and management, especially in forest resource status mapping, is increasingly becoming more popular in Vietnam. This paper presented the results of using Landsat 8, Google Earth and field survey results to develop a map of the current forest resource status at the Cat Ba Archipelago Biosphere Reserve in 2020. Landsat 8 image analysis using automatic classification method with eCognition Developer software to separate different objects, then using high resolution Google Earth image to review, edit, and add existing status. The study determined that the total area of \u200b\u200bforests and other land types in the study area was 20,462.38 ha, of which the forested area was 9,821.16 ha; the area of \u200b\u200bland with regenerated trees was 4,661.2 ha; the area of bare land area was 3,546.16 ha; the area of \u200b\u200bagricultural land was 424.18 ha; the area of \u200b\u200bsand was 53.47 ha; other land area was 997.21 ha; the water surface area was 959.0 ha. This study provided data on area of \u200b\u200bsoil types, forest types and the current map of forest resource status in Cat Ba Archipelago World Biosphere Reserve, helping management units to have well-established reference material in assessing forest status, from which to propose solutions to protect and develop forest resources and conserve biodiversity.<\/p>\n

Keywords:<\/em><\/strong> GIS, landsat 8 image, Google Earth image, forest status, Cat Ba<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>L\u1ea6N \u0110\u1ea6U TI\u00caN GHI NH\u1eacN S\u00c2U \u0102N L\u00c1 G\u00c2Y H\u1ea0I C\u00c2Y D\u1ea6U R\u00c1I\u00a0V\u00c0 SAO \u0110EN TR\u1ed2NG PH\u00c2N T\u00c1N T\u1ea0I \u0110\u00d4NG NAM B\u1ed8<\/p>\n

<\/a>\u0110\u00e0o Ng\u1ecdc Quang1<\/sup>, Nguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u2<\/sup>, Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t2<\/sup>, Nguy\u1ec5n Minh Ch\u00ed1<\/sup><\/p>\n

1 Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m Nghi\u1ec7p Nam B\u1ed9, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

D\u1ea7u r\u00e1i (Dipterocarpus alatus<\/em>) v\u00e0 Sao \u0111en (Hopea odorata<\/em>) ph\u00e2n b\u1ed1 r\u1ed9ng kh\u1eafp \u1edf mi\u1ec1n Nam Vi\u1ec7t Nam, l\u00e0 c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, m\u1ecdc nhanh, th\u00e2n th\u1eb3ng, t\u00e1n l\u00e1 \u0111\u1eb9p, r\u1ea5t \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng \u0111\u1ec3 tr\u1ed3ng c\u00e2y xanh tr\u00ean \u0111\u01b0\u1eddng ph\u1ed1. Tuy nhi\u00ean, nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y \u0111\u00e3 ghi nh\u1eadn xu\u1ea5t hi\u1ec7n lo\u00e0i S\u00e2u \u0103n l\u00e1 (Antheraea frithi<\/em>) g\u00e2y h\u1ea1i m\u1ea1nh \u0111\u1ed1i v\u1edbi hai lo\u00e0i c\u00e2y n\u00e0y tr\u00ean m\u1ed9t s\u1ed1 tuy\u1ebfn \u0111\u01b0\u1eddng t\u1ea1i Th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh, B\u00ecnh D\u01b0\u01a1ng v\u00e0 \u0110\u1ed3ng Nai. S\u00e2u \u0103n l\u00e1 g\u00e2y h\u1ea1i n\u1eb7ng theo t\u1eebng \u0111\u00e1m \u0111\u1ed1i v\u1edbi c\u00e2y D\u1ea7u r\u00e1i v\u00e0 Sao \u0111en 5 – 20 tu\u1ed5i tr\u1ed3ng ph\u00e2n t\u00e1n tr\u00ean m\u1ed9t s\u1ed1 tuy\u1ebfn \u0111\u01b0\u1eddng, v\u1edbi t\u1ef7 l\u1ec7 c\u00e2y b\u1ecb h\u1ea1i (P%) 82,2 – 97,0% v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb h\u1ea1i n\u1eb7ng (R = 2,12 – 2,86). Lo\u00e0i S\u00e2u \u0103n l\u00e1 (A. frithi<\/em>) l\u00e0 sinh v\u1eadt g\u00e2y h\u1ea1i nguy hi\u1ec3m \u0111\u1ed1i v\u1edbi hai lo\u00e0i c\u00e2y n\u00e0y. Do \u0111\u00f3, c\u1ea7n ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc, sinh th\u00e1i v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng \u0111\u1ec3 c\u00f3 gi\u1ea3i ph\u00e1p qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> D\u1ea7u r\u00e1i, Sao \u0111en, S\u00e2u \u0103n l\u00e1<\/td>\n<\/tr>\n

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<\/a>First report of Antheraea frithi<\/em> damaging Dipterocarpus alatus<\/em> and Hopea odorata <\/em>in Southeast Vietnam<\/strong><\/p>\n

Dipterocarpus alatus<\/em> and Hopea odorata<\/em> are large, fast-growing, straight-stemmed species with beautiful foliage, widely distributed in the Southeast Vietnam and very popular planting for Urban Green Space. However, according to the surveys of the Forest Protection Research Centre and Forest Science Institute of South Vietnam<\/a> undertaken in 4 years (2017, 2018, 2019 and 2020) on some roads in Ho Chi Minh City, Binh Duong and Dong Nai provinces, both species were heavily impacted by Tasar silkworm (Antheraea frithi<\/em>). The Tasar silkworm cause heavy damage 5 to 20 – year-old trees scattered on some roads, with damage incidence (P%) from 82.2 to 97.0% and severe damage (R = 2.12 – 2.86). The Tasar silkworm is a harmful insect to these two tree species. Therefore, it is necessary to continue to study the biological, ecology characteristics and control measures to have effective management solutions.<\/p>\n

Keywords:<\/em><\/strong> Antheraea frithi, Dipterocarpus alatus, Hopea odorata<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>PH\u00c2N T\u00cdCH HI\u1ec6U QU\u1ea2 KINH T\u1ebe M\u00d4 H\u00ccNH TR\u1ed2NG QU\u1ebeV\u00c0 TH\u1eca TR\u01af\u1edcNG TI\u00caU TH\u1ee4 M\u1ed8T S\u1ed0 S\u1ea2N PH\u1ea8N T\u1eea C\u00c2Y QU\u1ebe
\nT\u1ea0I HUY\u1ec6N V\u0102N Y\u00caN, T\u1ec8NH Y\u00caN B\u00c1I<\/p>\n

<\/a>Nguy\u1ec5n Gia Ki\u00eam, D\u01b0\u01a1ng Qu\u1ef3nh Hoa, Ho\u00e0ng Li\u00ean S\u01a1n, B\u00f9i Ng\u1ecdc Thu H\u00e0<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u Kinh t\u1ebf L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u ph\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 kinh t\u1ebf v\u00e0 th\u1ecb tr\u01b0\u1eddng ti\u00eau th\u1ee5 m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m t\u1eeb c\u00e2y Qu\u1ebf t\u1ea1i huy\u1ec7n V\u0103n Y\u00ean, t\u1ec9nh Y\u00ean B\u00e1i v\u00e0 m\u1ed9t nghi\u00ean c\u1ee9u \u0111i\u1ec3m s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p: (i) th\u1ed1ng k\u00ea m\u00f4 t\u1ea3, th\u1ed1ng k\u00ea so s\u00e1nh; (ii) h\u1ea1ch to\u00e1n h\u00e0ng n\u0103m b\u1eb1ng c\u00e1c ch\u1ec9 ti\u00eau: T\u1ed5ng chi ph\u00ed (TC), Gi\u00e1 tr\u1ecb s\u1ea3n xu\u1ea5t (GO); (iii) ph\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 t\u00e0i ch\u00ednh th\u00f4ng qua c\u00e1c ch\u1ec9 ti\u00eau: Gi\u00e1 tr\u1ecb hi\u1ec7n t\u1ea1i thu\u1ea7n (NPV), t\u1ef7 l\u1ec7 thu nh\u1eadp\/chi ph\u00ed (BCR), t\u1ef7 l\u1ec7 ho\u00e0n v\u1ed1n n\u1ed9i b\u1ed9 (IRR). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u1ec9 ra, m\u00f4 h\u00ecnh tr\u1ed3ng Qu\u1ebf thu\u1ea7n lo\u00e0i v\u1edbi chu k\u1ef3 kinh doanh 20 n\u0103m c\u00f3 t\u1ed5ng chi ph\u00ed (TC) \u0111\u1ea1t 293,48 tri\u1ec7u \u0111\u1ed3ng\/ha; Gi\u00e1 tr\u1ecb s\u1ea3n xu\u1ea5t (GO) \u0111\u1ea1t 1.466,4 tri\u1ec7u \u0111\u1ed3ng\/ha; Gi\u00e1 tr\u1ecb hi\u1ec7n t\u1ea1i r\u00f2ng (NPV) \u0111\u1ea1t 294,17 tri\u1ec7u \u0111\u1ed3ng\/ha; T\u1ef7 su\u1ea5t l\u1ee3i \u00edch\/chi ph\u00ed (BCR) \u0111\u1ea1t 3,37 l\u1ea7n v\u00e0 T\u1ef7 su\u1ea5t sinh l\u1eddi n\u1ed9i b\u1ed9 (IRR) l\u00e0 38%. Nh\u01b0 v\u1eady, c\u00f3 th\u1ec3 th\u1ea5y \u0111\u00e2y l\u00e0 m\u00f4 h\u00ecnh tr\u1ed3ng Qu\u1ebf \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf r\u1ea5t cao cho ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng. C\u00e1c s\u1ea3n ph\u1ea9m t\u1eeb c\u00e2y qu\u1ebf nh\u01b0: v\u1ecf qu\u1ebf, b\u1ed9t qu\u1ebf, tinh d\u1ea7u qu\u1ebf… ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c xu\u1ea5t kh\u1ea9u sang c\u00e1c n\u01b0\u1edbc v\u00e0 v\u00f9ng l\u00e3nh th\u1ed5: \u0110\u00e0i Loan, Trung Qu\u1ed1c, H\u00e0n Qu\u1ed1c, Nh\u1eadt B\u1ea3n, \u1ea4n \u0110\u1ed9, M\u1ef9,… th\u00f4ng qua 03 k\u00eanh ph\u00e2n ph\u1ed1i ch\u00ednh t\u1eeb ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng \u0111\u1ebfn ng\u01b0\u1eddi ti\u00eau d\u00f9ng cu\u1ed1i c\u00f9ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Hi\u1ec7u qu\u1ea3 kinh t\u1ebf, th\u1ecb tr\u01b0\u1eddng s\u1ea3n ph\u1ea9m t\u1eeb qu\u1ebf<\/td>\n<\/tr>\n

\n

<\/a>Analyzing the economic efficiency and consumption markets of Cinnamon products in Van Yen district, Yen Bai province<\/strong><\/p>\n

<\/a>The study analyzes the economic efficiency and consumption markets of Cinnamon products in Van Yen district, Yen Bai province and a case study using the method: (i) descriptive statistics, comparative statistics; (ii) annual accounting by the following criteria: Total cost (TC), Gross Output (GO); (iii) financial efficiency analysis through the following criteria: Net present value (NPV), benefit\/ cost ratio (BCR), internal rate of return (IRR). The research results show that the model of Cinnamon cultivation with a business cycle of 20 years had a total cost (TC) of 293.48 million VND \/ ha; Gross output (GO) reached 1,466.4 million VND\/ha; Net present value (NPV) is 294.17 million VND \/ ha; Benefit \/ cost ratio (BCR) is 3.37 times and Internal Rate of Return (IRR) is 38%. Thus, it can be seen that the Cinnamon model has brought high economic efficiency to forest growers. Products from cinnamon such as: cinnamon bark, powder, essential oil… are mainly exported to countries: Taiwan (China), China, Korea, Japan, India, America,… through 03 main distribution channels, from the growers to the final consumers.<\/p>\n

Keywords:<\/em> Economic efficiency, markets, Cinnamon products<\/p>\n

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

<\/a>HI\u1ec6U L\u1ef0C PH\u00d2NG CH\u1ed0NG M\u1ed0I G\u00c2Y H\u1ea0I C\u1ee6A G\u1ed6 D\u1eba \u0110\u1ece,\u00a0B\u1edcI L\u1edcI V\u00c0NG SAU X\u1eec L\u00dd B\u1ea2O QU\u1ea2N<\/p>\n

<\/a>V\u00f5 \u0110\u1ea1i H\u1ea3i1<\/sup>, Ho\u00e0ng Th\u1ecb T\u00e1m2<\/sup>, \u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc2<\/sup>,
\nNguy\u1ec5n Th\u1ecb H\u1eb1ng2<\/sup>, B\u00f9i Th\u1ecb Th\u1ee7y2<\/sup>, Nguy\u1ec5n Duy V\u01b0\u1ee3ng2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>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

D\u1ebb \u0111\u1ecf v\u00e0 B\u1eddi l\u1eddi v\u00e0ng l\u00e0 c\u00e1c c\u00e2y b\u1ea3n \u0111\u1ecba sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i nhanh, v\u00e2n th\u1edb \u0111\u1eb9p n\u00ean c\u00f3 ti\u1ec1m n\u0103ng r\u1ea5t l\u1edbn trong vi\u1ec7c gia c\u00f4ng, ch\u1ebf bi\u1ebfn c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u1ed3 m\u1ed9c. Tuy nhi\u00ean, \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean c\u1ee7a 2 lo\u1ea1i g\u1ed7 tr\u00ean ch\u1ec9 \u0111\u1ea1t m\u1ee9c trung b\u00ecnh v\u1edbi m\u1ed1i v\u00e0 m\u1ee9c k\u00e9m v\u1edbi n\u1ea5m h\u1ea1i g\u1ed7. K\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m hi\u1ec7u l\u1ef1c b\u1ea3o qu\u1ea3n g\u1ed7 ph\u00f2ng ch\u1ed1ng m\u1ed1i g\u00e2y h\u1ea1i c\u1ee7a g\u1ed7 x\u1ebb, v\u00e1n b\u00f3c t\u1eeb g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng, D\u1ebb d\u1ecf theo ph\u01b0\u01a1ng ph\u00e1p ng\u00e2m th\u01b0\u1eddng b\u1eb1ng ch\u1ebf ph\u1ea9m LN5<\/sub> \u1edf m\u1ee9c 5 – 7% \u1edf t\u1ea5t c\u1ea3 c\u00e1c m\u1ee9c th\u1eddi gian x\u1eed l\u00fd 30 ph\u00fat, 60 ph\u00fat, 90 ph\u00fat, 24h, 48h v\u00e0 72h \u0111\u1ec1u \u0111\u1ea3m b\u1ea3o hi\u1ec7u l\u1ef1c t\u1ed1t ph\u00f2ng ch\u1ed1ng m\u1ed1i. Khi b\u1ea3o qu\u1ea3n theo ph\u01b0\u01a1ng ph\u00e1p nh\u00fang b\u1eb1ng ch\u1ebf ph\u1ea9m BORAG2 <\/sub>cho v\u00e1n b\u00f3c g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng v\u1edbi th\u1eddi gian t\u1eeb 20 gi\u00e2y \u0111\u1ebfn 10 ph\u00fat v\u00e0 g\u1ed7 x\u1ebb D\u1ebb \u0111\u1ecf, B\u1eddi l\u1eddi v\u00e0ng t\u1eeb 5 ph\u00fat \u0111\u1ebfn 15 ph\u00fat c\u0169ng \u0111\u1ec1u cho k\u1ebft qu\u1ea3 hi\u1ec7u l\u1ef1c ph\u00f2ng ch\u1ed1ng m\u1ed1i t\u1ed1t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> LN5<\/sub>, BORAG1<\/sub>, BORAG 2, g\u1ed7 x\u1ebb D\u1ebb \u0111\u1ecf, v\u00e1n b\u00f3c B\u1eddi l\u1eddi v\u00e0ng<\/td>\n<\/tr>\n

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<\/a>Durability against termite Coptotermes formosanus<\/em> Shiraki of\u00a0sawnwood of Lithocarpus ducampii<\/em> and\u00a0veneer of Litsea pierrei<\/em> treated with preservatives<\/strong><\/p>\n

Red chestnut and Boi Loi are indigenous plants which relatively grow quickly and possess a beautiful grainy texture, so they have great potential in the processing of wood products and furniture. The study of natural durability show that wood from these species have moderate durability against termite and poor durability against wood-decaying fungi during processing and utilization. Therefore, to improve their wood quality, the study of preservation of wood from Red chestnut and Boi Loi is necessary. The results from laboratory testing show that soaking impregnation of sawnwood and veneer from Boi Loi and Red chestnut respectively with the preservative LN5<\/sub> at concentrations 5 -7% during 30 minutes, 60 minutes, 90 minutes, 24 hours, 48 \u200b\u200bhours and 72 hours all give good effectiveness against termites. Dipping peeling boards of Boi Loi with the preservative BORAG2<\/sub> for 20 seconds to 10 minutes and dipping the sawn wood of Red chestnut and Boi Loi for 5 minutes to 15 minutes are also effective in resistance gainst termite.<\/p>\n

Keywords:<\/em><\/strong> Wood preservative LN5<\/sub>, BORAG1<\/sub>, BORAG2<\/sub>…<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A X\u1eec L\u00dd T\u1ea8Y TR\u1eaeNG\u00a0\u0110\u1ebeN SAI M\u00c0U V\u00c0 T\u1ef6 L\u1ec6 LIGNIN C\u1ee6A G\u1ed6 M\u1ee0 V\u00c0 G\u1ed6 B\u1ed2 \u0110\u1ec0
\nL\u00c0M V\u1eacT LI\u1ec6U T\u1ea0O C\u1ed0T COMPOZIT G\u1ed6 NH\u1ef0A TH\u1ea4U QUANG<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Tr\u1ecbnh, Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, Nguy\u1ec5n Th\u1ecb H\u1eb1ng<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 x\u00e1c \u0111\u1ecbnh s\u1ef1 thay \u0111\u1ed5i m\u00e0u s\u1eafc v\u00e0 t\u1ef7 l\u1ec7 lignin c\u1ee7a g\u1ed7 M\u1ee1 v\u00e0 g\u1ed7 B\u1ed3 \u0111\u1ec1 sau qu\u00e1 tr\u00ecnh t\u1ea9y tr\u1eafng b\u1eb1ng dung d\u1ecbch H2<\/sub>O2<\/sub> v\u00e0 NaOH l\u00e0m v\u1eadt li\u1ec7u t\u1ea1o c\u1ed1t compozit g\u1ed7 nh\u1ef1a th\u1ea5u quang. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: S\u1ef1 ch\u00eanh l\u1ec7ch m\u00e0u (\u0394E) c\u1ee7a g\u1ed7 M\u1ee1 (20,68) v\u00e0 g\u1ed7 B\u1ed3 \u0111\u1ec1 (28,18) tr\u01b0\u1edbc v\u00e0 sau khi x\u1eed l\u00fd t\u1ea9y tr\u1eafng l\u00e0 r\u1ea5t l\u1edbn. M\u00e0u s\u1eafc c\u1ee7a hai lo\u1ea1i g\u1ed7 sau qu\u00e1 tr\u00ecnh t\u1ea9y tr\u1eafng s\u00e1ng l\u00ean\/nh\u1ea1t h\u01a1n nhi\u1ec1u (\u0394L c\u1ee7a g\u1ed7 M\u1ee1: +5,53 v\u00e0 g\u1ed7 B\u1ed3 \u0111\u1ec1: +5,39). H\u01a1n n\u1eefa, g\u1ed7 M\u1ee1 v\u00e0 g\u1ed7 B\u1ed3 \u0111\u1ec1 \u0111\u1ec1u c\u00f3 xu h\u01b0\u1edbng xanh (l\u1ee5c) h\u01a1n (-\u0394a) v\u00e0 v\u00e0ng h\u01a1n (+\u0394b) sau qu\u00e1 tr\u00ecnh x\u1eed l\u00fd t\u1ea9y tr\u1eafng. T\u1ef7 l\u1ec7 lignin c\u1ee7a g\u1ed7 M\u1ee1 gi\u1ea3m 60% v\u00e0 g\u1ed7 B\u1ed3 \u0111\u1ec1 gi\u1ea3m 80% sau khi t\u1ea9y tr\u1eafng. D\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 \u0111\u00f3 cho th\u1ea5y g\u1ed7 B\u1ed3 \u0111\u1ec1 th\u00edch h\u1ee3p l\u00e0m v\u1eadt li\u1ec7u t\u1ea1o c\u1ed1t compozit g\u1ed7 nh\u1ef1a th\u1ea5u quang.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> T\u1ea9y tr\u1eafng, lignin, g\u1ed7 M\u1ee1, g\u1ed7 B\u1ed3 \u0111\u1ec1<\/td>\n<\/tr>\n

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<\/a>Effect of the bleaching treatment on the colour difference and lignin ratio of Manglietia conifera<\/em> and Styrax tonkinensis<\/em> wood used as base materials of transparent wood composites<\/strong><\/p>\n

This study investigated the change of colour and lignin ratio of Manglietia conifera<\/em> and Styrax tonkinensis<\/em> wood after the bleaching treatment using hydrogen peroxide (H2<\/sub>O2<\/sub>) and sodium hydroxide (NaOH) agents, used as base materials of transparent wood composites. Results showed that there was a significant difference in the colour change (\u0394E) of both Manglietia conifera<\/em> (20.68) and Styrax tonkinensis <\/em>(28.18) after the bleaching treatment. The colour of the two timbers after bleaching was much lighter (\u0394L of Manglietia conifera<\/em>: +5.53 and Styrax tonkinensis<\/em>: +5.39). Furthermore, the colour of both timbers after the treatment also tend to be greener (-\u0394a) and yellower (+\u0394b). The lignin ratio of Manglietia conifera<\/em> decreased by 60% while Styrax tonkinensis<\/em> decreased by 80% after bleaching. Based on the results, it is indicated that Styrax tonkinensis<\/em> wood is more suitable as a base material of transparent wood composites.<\/p>\n

Keywords:<\/em><\/strong> Bleaching, lignin, Manglietia conifera<\/em> Dandy, Styrax tonkinensis<\/em> (Pierre) Craib<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A T\u1ef6 L\u1ec6 C\u00c1C TH\u00c0NH PH\u1ea6N NGUY\u00caN LI\u1ec6U\u00a0\u0110\u1ebeN CH\u1ea4T L\u01af\u1ee2NG KEO MELAMINE UREA FORMALDEHYDE
\nCHO S\u1ea2N XU\u1ea4T V\u00c1N D\u00c1N CH\u1ed0NG \u1ea8M V\u00c0 TH\u00c2N THI\u1ec6N M\u00d4I TR\u01af\u1edcNG<\/p>\n

<\/a>Nguy\u1ec5n H\u1ed3ng Minh, Tr\u1ea7n \u0110\u1ee9c Trung<\/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

S\u1eed d\u1ee5ng keo Melamine Urea Formaldehyde (MUF) trong ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00e1n g\u1ed7 nh\u00e2n t\u1ea1o l\u00e0 h\u01b0\u1edbng ti\u1ebfp c\u1eadn \u0111\u1ec3 c\u1ea5u th\u00e0nh n\u00ean c\u00e1c s\u1ea3n ph\u1ea9m g\u1ed7 an to\u00e0n v\u1ec1 \u0111\u1ed9 b\u1ec1n ch\u1ed1ng ch\u1ecbu \u1ea9m \u01b0\u1edbt, gi\u1ea3m ph\u00e1t th\u1ea3i kh\u00ed \u0111\u1ed9c h\u1ea1i formaldehyde t\u1ef1 do v\u1edbi chi ph\u00ed gi\u00e1 th\u00e0nh c\u1ea1nh tranh. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e1nh gi\u00e1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a t\u1ef7 l\u1ec7 t\u01b0\u01a1ng t\u00e1c nguy\u00ean li\u1ec7u t\u1ed5ng h\u1ee3p keo MUF \u1edf c\u00e1c quy m\u00f4 2 kg; 100 kg v\u00e0 1.000 kg\/m\u1ebb. C\u00e1c t\u1ef7 l\u1ec7 \u0111\u1ecbnh l\u01b0\u1ee3ng mol gi\u1eefa (Formaldehyde\/Urea + Melamine) l\u1ea7n l\u01b0\u1ee3t l\u00e0 1,5; 1,75; 2,0. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y c\u00e1c ch\u1ec9 ti\u00eau c\u1ee7a keo MUF sau khi t\u1ed5ng h\u1ee3p (24h) \u0111\u1ea1t c\u00e1c th\u00f4ng s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng: m\u00e0u trong su\u1ed1t, h\u00e0m l\u01b0\u1ee3ng kh\u00f4: 48 – 53%; \u0111\u1ed9 nh\u1edbt: 15 – 17mps; pH = 7,0 – 8,0; th\u1eddi gian s\u1ed1ng 20 ng\u00e0y (30 – 35o<\/sup>C). H\u00e0m l\u01b0\u1ee3ng formaldehyde t\u1ef1 do c\u1ee7a v\u00e1n \u00e9p s\u1eed d\u1ee5ng keo MUF t\u1ed5ng h\u1ee3p \u0111\u1ea1t ti\u00eau chu\u1ea9n E1 c\u1ee7a ch\u00e2u \u00c2u \u0111\u1ed1i v\u1edbi t\u1ef7 l\u1ec7 F\/U + M = 1,5 v\u00e0 1,75. H\u00e0m l\u01b0\u1ee3ng Formaldehyde t\u1ef1 do t\u0103ng d\u1ea7n theo t\u1ef7 l\u1ec7 F\/U + M. C\u01b0\u1eddng \u0111\u1ed9 d\u00e1n d\u00ednh c\u1ee7a v\u00e1n d\u00e1n \u0111\u1ea1t 1,5 – 1,8 MPA, Class 2 theo ti\u00eau chu\u1ea9n EN 314 – 1&2 cho \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt c\u00f3 m\u00e1i che. V\u00e1n d\u00e1n c\u00f3 gi\u00e1 tr\u1ecb c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu l\u1ef1c cao \u1edf m\u1ee9c \u0111\u1ed9 b\u1ec1n u\u1ed1n MOR \u0111\u1ea1t t\u1eeb 78 – 88 Mpa, m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i MOE \u0111\u1ea1t 7.900 – 9.000 Mpa.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Quy tr\u00ecnh t\u1ed5ng h\u1ee3p keo, keo Melamine-Urea-Formaldehyde (MUF), h\u00e0m l\u01b0\u1ee3ng d\u01b0 formaldehyde, v\u00e1n d\u00e1n, ti\u00eau chu\u1ea9n E1<\/td>\n<\/tr>\n

\n

<\/a>Effect of raw material ingredient ratio to the quality of Melamine Urea Formaldehyde adhesive for moisture resistance and eco-friendly plywood manufacturing<\/strong><\/p>\n

The use of Melamine Urea Formaldehyde (MUF) adhesive in the wood-based panel industry is the approach to create wood products that are durable to humid use condition and safe in minimizing formaldehyde toxic emission at cost into competition. This study evaluated the effects of raw material mol ratio for sythesyzing MUF adhesive at the scales of 2 kg; 100 kg and 1.000 kg\/batch. The molar quantitative ratios (Formaldehyde\/Ure + Melamine) are 1.5; 1.75; 2.0. Experimental results showed technical parameters of MUF glue after synthesis (24 hours) achieved the following quality parameters: transparent color, dry content: 48 – 53%; Viscosity: 15 – 17 mpas; pH = 7.0 – 8.0; Pot life: 20 days (30 – 35o<\/sup>C). The free formaldehyde content of plywood using synthesized MUF adhesive meets European E1 standard for the ratio of F \/ U + M = 1.5 and 1.75. The adhesion strength of the plywood gained by 1.5 – 1.8 MPA, Class 2 according to EN 314 – 1&2 standard for use in humid environments. The plywood has high mechanical strength value of bending strength (MOR) by 78 – 88 Mpa and modulus of elassticity (MOE) by 7,900 – 9,000 Mpa.<\/p>\n

Keywords:<\/em><\/strong> Adhesive Synthesis process, Melamine-Urea-Formaldehyde adhesive (MUF), free formaldehyde content, E1 standard, plywood<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a><\/a>NGHI\u00caN C\u1ee8U TH\u1ef0C NGHI\u1ec6M\u00a0X\u00c1C \u0110\u1ecaNH M\u1ed8T S\u1ed0 CH\u1ec8 TI\u00caU K\u00c9O B\u00c1M
\nV\u00c0 L\u00c0M VI\u1ec6C C\u1ee6A LI\u00caN H\u1ee2P M\u00c1Y C\u00c0Y CH\u0102M S\u00d3C R\u1eeaNG<\/p>\n

<\/a>\u0110o\u00e0n V\u0103n Thu1<\/sup>, Nguy\u1ec5n Nh\u1eadt Chi\u00eau2<\/sup>, T\u00f4 Qu\u1ed1c Huy1<\/sup><\/p>\n

[1]Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e1c ch\u1ec9 ti\u00eau k\u00e9o b\u00e1m v\u00e0 l\u00e0m vi\u1ec7c c\u1ee7a li\u00ean h\u1ee3p m\u00e1y (LHM) canh t\u00e1c trong l\u00e2m nghi\u1ec7p ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, t\u1eeb k\u1ebft c\u1ea5u, k\u1ef9 n\u0103ng \u0111i\u1ec1u khi\u1ec3n, \u0111\u1eb7c \u0111i\u1ec3m \u0111\u1ecba h\u00ecnh, t\u00ednh ch\u1ea5t \u0111\u1ea5t \u0111ai,… \u0111\u1ebfn y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt canh t\u00e1c. Vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c ch\u1ec9 ti\u00eau n\u00e0y b\u1eb1ng c\u00e1c c\u00f4ng th\u1ee9c, ph\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc kh\u00f3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c, \u0111\u1ea7y \u0111\u1ee7 c\u0169ng nh\u01b0 s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 quan h\u1ec7 gi\u1eefa ch\u00fang. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, ch\u1ec9 ti\u00eau k\u00e9o b\u00e1m v\u00e0 l\u00e0m vi\u1ec7c quan tr\u1ecdng tr\u00ean c\u01a1 s\u1edf thi\u1ebft l\u1eadp h\u1ec7 th\u1ed1ng thi\u1ebft b\u1ecb th\u00ed nghi\u1ec7m \u0111o hi\u1ec7n \u0111\u1ea1i. Tr\u00ean \u0111\u1ea5t l\u00e2m nghi\u1ec7p, h\u1ec7 s\u1ed1 c\u1ea3n l\u0103n (f) c\u1ee7a m\u00e1y k\u00e9o Yanmar F535D l\u1eafp h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng c\u1ea3i ti\u1ebfn c\u00f3 gi\u00e1 tr\u1ecb t\u1eeb 0,081 – 0,089, l\u1edbn h\u01a1n t\u1eeb 2,3 – 3,1% so v\u1edbi khi l\u1eafp h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng nguy\u00ean b\u1ea3n; h\u1ec7 s\u1ed1 b\u00e1m (\u03c6x<\/sub>) \u0111\u1ea1t t\u1eeb 0,695 \u0111\u1ebfn 0,752, t\u0103ng t\u1eeb 10,93 – 13,59% so v\u1edbi h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng nguy\u00ean b\u1ea3n; h\u1ec7 s\u1ed1 l\u1ef1c c\u1ea3n ri\u00eang c\u1ee7a c\u00e0y ch\u1ea3o Kc<\/sub> = 32.620 N\/m2<\/sup> khi c\u00e0y v\u1edbi \u0111\u1ed9 s\u00e2u hc<\/sub> = 0,075 m v\u00e0 Kc<\/sub> = 37.693 N\/m2<\/sup> khi hc<\/sub> = 0,1 m; LHM l\u00e0m vi\u1ec7c kh\u00e1 \u1ed5n \u0111\u1ecbnh \u1edf g\u00f3c d\u1ed1c tr\u00ean 100<\/sup> \u0111\u1ebfn 12,30<\/sup>, n\u0103ng su\u1ea5t \u0111\u1ea1t t\u1eeb 0,33 ha\/h \u0111\u1ebfn 0,47 ha\/h. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u0169ng x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c \u0111\u1eb7c t\u00ednh k\u00e9o b\u00e1m th\u1ef1c nghi\u1ec7m c\u1ee7a h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng c\u1ea3i ti\u1ebfn tr\u00ean \u0111\u1ea5t l\u00e2m nghi\u1ec7p, quan h\u1ec7 gi\u1eefa hi\u1ec7u su\u1ea5t k\u00e9o v\u00e0 \u0111\u1ed9 tr\u01b0\u1ee3t \u03b7k<\/sub> = f(\u03b4), \u0111\u00e2y l\u00e0 nh\u1eefng ch\u1ec9 ti\u00eau quan tr\u1ecdng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ednh n\u0103ng k\u1ef9 thu\u1eadt c\u1ee7a m\u00e1y k\u00e9o, \u0111\u1ed3ng th\u1eddi l\u00e0m c\u01a1 s\u1edf x\u00e1c \u0111\u1ecbnh ch\u1ebf \u0111\u1ed9 l\u00e0m vi\u1ec7c ph\u00f9 h\u1ee3p, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1ea5t d\u1ed1c l\u00e2m nghi\u1ec7p, \u0111\u1eb7c t\u00ednh k\u00e9o b\u00e1m, h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng m\u00e1y k\u00e9o b\u00e1nh<\/td>\n<\/tr>\n

\n

<\/a>Experimental study on the determination of traction-gripping capacity and working indicators of the forestry tractor Yanmar F535D<\/strong><\/p>\n

The traction-gripping capacity and working indicators of a forestry agrimotor system depend on multiple factors such as machine structure, operating skills, terrain conditions, soil characteristics and the requirements of the cultivation technique. The use of mathematical equations in determination of these indicators leads to the limitations on the accuracy, variation and relationship among the indicators. The results of emperimental study has determined the important technical specifications, gripping capacity and working indicators using a moderm experimental system. On forestry terrain, the Yanmar F535D traction system equipped with improvement of the self-movement system has a rolling resistance indicator (f) of 0.081 – 0.089, representing an increase of 2.3% to 3.1% compared to the original tractor. The lateral friction indicator \u03c6x <\/sub>was determined at 0.695-0.752 which is represented higher than that of the original tractor with an increase of 10.93% to 13.59%. The resistance force indicator Kc<\/sub> is recorded at 32.620 N\/m2 <\/sup>at the plowing depth hc<\/sub> in the soil of 0.075 m. Kc<\/sub> was determined at 37.693 N\/m2<\/sup> when hc<\/sub> was increased to 0.1 m. The tractor system showed the stability during working at the terrain slope of 10\u00b0 to 13\u00b0 with the productivity of 0.33 ha\/h to 0.47 ha\/h. The empirical study has determined the gripping-traction characteristics of the improved self-movement tractor system on forest terrain, the relationship between traction efficiency \u03b7k<\/sub> and sliding index \u03b4k<\/sub>, which are important parameters in assessing the technical performance of the tractor system as well as in improving the working ability of the tractor system.<\/p>\n

Keywords:<\/em><\/strong> Steep forest terrain, traction – gripping characteristics, the self-movement system of rubber tractor.<\/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 1 – 2021 1. Nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng B\u01b0\u01a1ng l\u00f4ng \u0111i\u1ec7n bi\u00ean (Dendrocalamus dienbienensis H.N.Nguyen & V.T.Nguyen) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom c\u00e0nh ch\u00e9t Research on propagation technique of of Dendrocalamus dienbienensis H.N.Nguyen & V.T.Nguyen by shoot cutting method Nguy\u1ec5n Anh D\u0169ng Nguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t […]<\/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\/2208"}],"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=2208"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2208\/revisions"}],"predecessor-version":[{"id":2393,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2208\/revisions\/2393"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2208"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}