{"id":2191,"date":"2020-11-30T12:06:39","date_gmt":"2020-11-30T05:06:39","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2191"},"modified":"2023-11-23T12:24:52","modified_gmt":"2023-11-23T05:24:52","slug":"vietnam-journal-of-forest-science-number-5-2020","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/vietnam-journal-of-forest-science-number-5-2020\/","title":{"rendered":"Vietnam Journal of Forest Science Number 5-2020"},"content":{"rendered":"

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<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 5<\/strong> – <\/strong>20<\/strong>20<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nT\u0103ng thu di truy\u1ec1n th\u1ef1c t\u1ebf v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y c\u1ee7a m\u1ed9t s\u1ed1 gi\u1ed1ng Keo l\u00e1 li\u1ec1m so v\u1edbi gi\u1ed1ng nguy\u00ean s\u1ea3n v\u00e0 \u0111\u1ea1i tr\u00e0 t\u1ea1i Qu\u1ea3ng Tr\u1ecb<\/td>\nRealized genetic gain in growth and stem quality of breed seedsources of Acacia crassicarpa <\/em>compared to natural provenances and commercial seedsources in Quang Tri<\/td>\nL\u00ea Xu\u00e2n To\u00e0n
\n<\/strong>Ph\u00ed H\u1ed3ng H\u1ea3i
\n<\/strong>Nguy\u1ec5n Th\u1ecb Thanh Nga
\n<\/strong>L\u00ea Th\u1ecb Nh\u01b0 Nguy\u1ec7t
\n<\/strong>Tr\u1ea7n Th\u1ecb T\u01b0\u1eddng V\u00e2n<\/em><\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng V\u00f9 h\u01b0\u01a1ng (Cinnamomum balansae<\/em> Lecomte) b\u1eb1ng h\u1ea1t<\/td>\nResearch on propagation techniques of Cinnamomum balansae <\/em>Lecomte from seeds<\/td>\nB\u00f9i Th\u1ecd Ti\u1ebfn
\nNguy\u1ec5n Vi\u1ec5n
\nHo\u00e0ng V\u0103n Th\u1eafng
\nL\u00ea V\u0103n Quang
\nNguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t
\nNguy\u1ec5n Ti\u00ean Phong<\/em><\/td>\n		12<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u kh\u1ea3o nghi\u1ec7m gi\u1ed1ng v\u00e0 k\u1ef9 thu\u1eadt tr\u1ed3ng th\u00e2m canh Keo l\u00e1 tr\u00e0m
\nt\u1ea1i Gia Lai<\/td>\n		Establish models of seeds experiment and intensive planting of Acacia auriculiformis<\/em> for large timber with new approved races at Pleiku, Gia Lai<\/td>\nTr\u1ea7n Th\u1ecb Th\u00fay H\u1eb1ng
\nL\u00ea Vi\u1ec7t D\u0169ng<\/em><\/td>\n		21<\/td>\n<\/tr>\n
4.<\/td>\nM\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e2y G\u1ee5 lau (Sindora<\/em> tonkinensis<\/em> A. Chev. Ex K. & S. S. Larsen.) t\u1ea1i Qu\u1ea3ng B\u00ecnh<\/td>\nSilvicultural characteristics of Sindora tonkinensis <\/em>A. Chev. ex K. & S. S. Larsen. in Quang Binh province<\/td>\nNguy\u1ec5n H\u1ea3i Th\u00e0nh
\nPh\u1ea1m Xu\u00e2n \u0110\u1ec9nh
\nNguy\u1ec5n Th\u1ecb Li\u1ec7u
\nV\u0169 \u0110\u1ee9c B\u00ecnh
\nL\u00ea C\u00f4ng \u0110\u1ecbnh
\nH\u00e0 V\u0103n Thi\u1ec7n
\nL\u00ea Xu\u00e2n To\u00e0n
\nPh\u1ea1m Ti\u1ebfn H\u00f9ng<\/em><\/td>\n		27<\/td>\n<\/tr>\n
5.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng
\nm\u1ed9t s\u1ed1 lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 tr\u00e0m Melaleuca tr\u1ed3ng tr\u00ean \u0111\u1ea5t ph\u00e8n t\u1ea1i Th\u1ea1nh H\u00f3a –
\nLong An<\/td>\n		Evaluating on growth of some melaleuca species and provenances planting on acid sulpahte soil in Thanh Hoa – Long An<\/td>\nNguy\u1ec5n Xu\u00e2n H\u1ea3i
\nV\u0169 \u0110\u00ecnh H\u01b0\u1edfng v\u00e0
\nKi\u1ec1u M\u1ea1nh H\u00e0<\/em><\/td>\n		39<\/td>\n<\/tr>\n
6.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng Sa m\u1ed9c (Cunninghamia lanceolata <\/em>(Lamb.) Hook) \u1edf Qu\u1ea3ng Ninh<\/td>\nEffect of planting techniques on the growth of Cunninghamia lanceolata<\/em> (Lamb.) Hook plantations
\nin Quang Ninh province<\/td>\n		\u0110\u1eb7ng V\u0103n Thuy\u1ebft
\nL\u00ea Th\u1ecb Ng\u1ecdc H\u00e0
\nNguy\u1ec5n To\u00e0n Th\u1eafng
\n\u0110inh H\u1ea3i \u0110\u0103ng
\n\u0110\u00e0o Trung \u0110\u1ee9c
\nD\u01b0\u01a1ng Quang Trung
\nL\u00ea Th\u1ecb H\u1ea1nh
\nTr\u1ea7n Anh H\u1ea3i<\/em><\/td>\n		46<\/td>\n<\/tr>\n
7.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a qu\u1ea3n l\u00fd v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c v\u00e0 b\u00f3n ph\u00e2n \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 \u0111\u1ed9 ph\u00ec \u0111\u1ea5t r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n lai UP
\n(E. urophylla<\/em> \u00d7 E. pellita<\/em>) giai \u0111o\u1ea1n 5 n\u0103m tu\u1ed5i t\u1ea1i Y\u00ean B\u00e1i<\/td>\n		Effects of slash and litter management and fertilizer practices on growth and soil chemical properties of eucalyptus hybrid
\n(E. urophylla<\/em> \u00d7 E. pellita<\/em>)
\n5 years old in Yen Bai province<\/td>\n		Nguy\u1ec5n Ti\u1ebfn Linh
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nTr\u1ea7n L\u00e2m \u0110\u1ed3ng
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nD\u01b0\u01a1ng Quang Trung
\nTr\u1ea7n Anh H\u1ea3i
\nHo\u00e0ng Th\u1ecb Nhung
\nTr\u1ea7n H\u1ed3ng V\u00e2n<\/em><\/td>\n		55<\/td>\n<\/tr>\n
8.<\/td>\nPh\u00e2n t\u00edch c\u00e1c nh\u00e2n t\u1ed1 \u1ea3nh h\u01b0\u1edfng t\u1edbi ch\u00e1y r\u1eebng v\u00e0 ph\u00e2n v\u00f9ng tr\u1ecdng \u0111i\u1ec3m ch\u00e1y r\u1eebng t\u1ea1i t\u1ec9nh
\n\u0110\u1ed3ng Nai<\/td>\n		Analyzing the factors effecting on forest fire and mapping the forest fire risk zone in Dong Nai province<\/td>\nD\u01b0\u01a1ng Huy Kh\u00f4i
\nTr\u1ea7n Quang B\u1ea3o
\nNguy\u1ec5n Th\u1ecb Hoa
\nV\u00f5 Minh Ho\u00e0n
\nNguy\u1ec5n V\u0103n Qu\u00fd<\/em><\/td>\n		64<\/td>\n<\/tr>\n
9.<\/td>\n\u0110\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 kinh t\u1ebf c\u00e1c m\u00f4 h\u00ecnh n\u00f4ng l\u00e2m k\u1ebft h\u1ee3p t\u1ea1i Kon Tum<\/td>\nAssessing the economic efficiency of typical agroforestry models
\nin Kon Tum<\/td>\n		Nguy\u1ec5n Thanh S\u01a1n
\nHo\u00e0ng Th\u1ecb Nhung
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nNguy\u1ec5n H\u1eefu Th\u1ecbnh
\nTr\u1ea7n Ho\u00e0ng Qu\u00fd
\nH\u00e0 Th\u1ecb Mai
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nH\u1ed3 Trung L\u01b0\u01a1ng
\nPh\u1ea1m Ti\u1ebfn D\u0169ng
\nTr\u1ea7n H\u1ed3ng V\u00e2n
\nC\u00e1p Th\u1ebf Ki\u1ec7t
\nPh\u1ea1m Th\u1ecb Xu\u00e2n Th\u00f9y<\/em><\/td>\n		81<\/td>\n<\/tr>\n
10.<\/td>\nNghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111i\u1ec1u ki\u1ec7n nu\u00f4i c\u1ea5y \u0111\u1ebfn m\u1eadt \u0111\u1ed9 t\u1ebf b\u00e0o c\u1ee7a s\u00e1u ch\u1ee7ng vi khu\u1ea9n sinh m\u00e0ng nh\u1ea7y<\/td>\nResearch on affects of submerged culture condition to cell density of six strains polysaccharide synthesized bacteria<\/td>\nV\u0169 V\u0103n \u0110\u1ecbnh
\nPh\u1ea1mV\u0103n Nh\u1eadt
\nNguy\u1ec5nTh\u1ecb Loan
\nTr\u1ea7n Nh\u1eadt T\u00e2n<\/em><\/td>\n		95<\/td>\n<\/tr>\n
11.<\/td>\nTh\u00e0nh ph\u1ea7n lo\u00e0i, \u0111\u1eb7c \u0111i\u1ec3m g\u00e2y h\u1ea1i v\u00e0 t\u1eadp t\u00ednh m\u1ed9t s\u1ed1 lo\u00e0i s\u00e2u h\u1ea1i Tre b\u00e1t \u0111\u1ed9
\nt\u1ea1i huy\u1ec7n Tr\u1ea5n Y\u00ean,
\nt\u1ec9nh Y\u00ean B\u00e1i<\/td>\n		Species composition, harmful characteristics and behavior of some bat do bamboo pests in Tran Yen district,
\nYen Bai province<\/td>\n		Nguy\u1ec5n V\u0103n Th\u00e0nh
\nL\u00ea V\u0103n B\u00ecnh
\n\u0110\u00e0o Ng\u1ecdc Quang
\nTr\u1ea7n Xu\u00e2n H\u01b0ng
\nTr\u1ea7n Vi\u1ebft Th\u1eafng v\u00e0 Trang A T\u1ed5ng<\/em><\/td>\n		103<\/td>\n<\/tr>\n
12.<\/td>\nNghi\u00ean c\u1ee9u ph\u00f2ng ch\u1ed1ng Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh (Hieroglyphus tonkinensis<\/em> Bolivar) h\u1ea1i lu\u1ed3ng (Dendrocalamus barbatus<\/em>) \u1edf Ph\u00fa Th\u1ecd b\u1eb1ng ch\u1ebf ph\u1ea9m sinh h\u1ecdc<\/td>\nReseacch of control on locust (Hieroglyphus tonkinensis<\/em> Bolivar) damaging to bamboo (Dendrocalamus barbatus<\/em>)
\nby biological product<\/td>\n		B\u00f9i Quang Ti\u1ebfp
\nTr\u1ea7n Thanh Tr\u0103ng
\nPhan V\u0103n S\u01a1n<\/em><\/td>\n		112<\/td>\n<\/tr>\n
13.<\/td>\nK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ea3i ti\u1ebfn h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng m\u00e1y k\u00e9o l\u00e0m vi\u1ec7c tr\u00ean \u0111\u1ea5t n\u00f4ng, l\u00e2m nghi\u1ec7p<\/td>\nThe self movement system improvement of a tractor working on farm and
\nforest terrain<\/td>\n		T\u00f4 Qu\u1ed1c Huy
\n\u0110o\u00e0n V\u0103n Thu
\nB\u00f9i Vi\u1ec7t \u0110\u1ee9c<\/em><\/td>\n		120<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>T\u0102NG THU DI TRUY\u1ec0N TH\u1ef0C T\u1ebe V\u1ec0 SINH TR\u01af\u1edeNG V\u00c0 CH\u1ea4T L\u01af\u1ee2NG TH\u00c2N C\u00c2Y C\u1ee6A M\u1ed8T S\u1ed0 GI\u1ed0NG KEO L\u00c1 LI\u1ec0M SO V\u1edaI GI\u1ed0NG NGUY\u00caN S\u1ea2N V\u00c0 \u0110\u1ea0I TR\u00c0 T\u1ea0I QU\u1ea2NG TR\u1eca<\/p>\n

<\/a>L\u00ea Xu\u00e2n To\u00e0n1<\/sup>, <\/sub>Ph\u00ed H\u1ed3ng H\u1ea3i2<\/sup>, Nguy\u1ec5n Th\u1ecb Thanh Nga1<\/sup>,
\nL\u00ea Th\u1ecb Nh\u01b0 Nguy\u1ec7t1<\/sup>, Tr\u1ea7n Th\u1ecb T\u01b0\u1eddng V\u00e2n1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m KHLN B\u1eafc Trung B\u1ed9
\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

\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng v\u00e0 t\u0103ng thu di truy\u1ec1n c\u1ee7a c\u00e1c l\u00f4 h\u1ea1t gi\u1ed1ng \u0111\u00e3 qua c\u1ea3i thi\u1ec7n thu h\u00e1i t\u1eeb v\u01b0\u1eddn gi\u1ed1ng th\u1ebf h\u1ec7 2 Keo l\u00e1 li\u1ec1m t\u1ea1i Cam L\u1ed9, Qu\u1ea3ng Tr\u1ecb so v\u1edbi l\u00f4 h\u1ea1t \u0111\u1ea1i tr\u00e0 v\u00e0 nguy\u00ean s\u1ea3n; 9 ngu\u1ed3n h\u1ea1t gi\u1ed1ng \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o x\u00e2y d\u1ef1ng 2 kh\u1ea3o nghi\u1ec7m t\u0103ng thu di truy\u1ec1n Keo l\u00e1 li\u1ec1m t\u1ea1i v\u00f9ng \u0111\u1ed3i v\u00e0 v\u00f9ng c\u00e1t Qu\u1ea3ng Tr\u1ecb. M\u1ed7i kh\u1ea3o nghi\u1ec7m c\u00f3 di\u1ec7n t\u00edch 1 ha, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf th\u00ed nghi\u1ec7m kh\u1ed1i ng\u1eabu nhi\u00ean kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7, 09 l\u00f4 h\u1ea1t, 5 l\u1ea7n l\u1eb7p l\u1ea1i, 36 c\u00e2y\/\u00f4, kho\u1ea3ng c\u00e1ch tr\u1ed3ng 3 \u00b4 2 m cho c\u1ea3 hai l\u1eadp \u0111\u1ecba. C\u00e2y trong kh\u1ea3o nghi\u1ec7m t\u1ea1i v\u00f9ng c\u00e1t \u1edf L\u1ec7 Xuy\u00ean c\u00f3 sinh tr\u01b0\u1edfng ch\u1eadm, \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh \u0111\u1ea1t 1,9 cm, chi\u1ec1u cao \u0111\u1ea1t 2,7 m v\u00e0 th\u1ec3 t\u00edch \u0111\u1ea1t 0,6 dm3<\/sup>. V\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y, ch\u01b0a c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y gi\u1eefa c\u00e1c l\u00f4 h\u1ea1t nh\u01b0ng \u0111\u1ec1u cho ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y kh\u00e1 t\u1ed1t. Kh\u1ea3o nghi\u1ec7m t\u0103ng thu di truy\u1ec1n Keo l\u00e1 li\u1ec1m t\u1ea1i v\u00f9ng \u0111\u1ed3i \u1edf Cam L\u1ed9 giai \u0111o\u1ea1n 30 th\u00e1ng tu\u1ed5i, sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e1c ngu\u1ed3n h\u1ea1t Keo l\u00e1 li\u1ec1m bi\u1ebfn \u0111\u1ed9ng t\u1eeb 5,4 cm \u0111\u1ebfn 6,5 cm, chi\u1ec1u cao bi\u1ebfn \u0111\u1ed9ng t\u1eeb 5,4 m \u0111\u1ebfn 6,9 m, th\u1ec3 t\u00edch bi\u1ebfn \u0111\u1ed9ng t\u1eeb 6,6 \u0111\u1ebfn 12 dm3<\/sup>. C\u00e1c l\u00f4 h\u1ea1t c\u1ee7a gia \u0111\u00ecnh 44, 13 v\u00e0 46 c\u00f3 \u0111\u1ed9 duy tr\u00ec tr\u1ee5c th\u00e2n v\u01b0\u1ee3t tr\u1ed9i, l\u1ea7n l\u01b0\u1ee3t l\u00e0 4,2; 3,6 v\u00e0 3,7 \u0111i\u1ec3m so v\u1edbi l\u00f4 h\u1ea1t s\u1ea3n xu\u1ea5t \u0111\u1ea1i tr\u00e0 l\u00e0 3,4 \u0111i\u1ec3m. V\u1ec1 t\u0103ng thu di truy\u1ec1n th\u1ef1c t\u1ebf, c\u00e1c l\u00f4 h\u1ea1t t\u1eeb v\u01b0\u1eddn gi\u1ed1ng chuy\u1ec3n h\u00f3a t\u1eeb c\u00e1c kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 2 t\u1ea1i Qu\u1ea3ng Tr\u1ecb v\u00e0 B\u00ecnh Thu\u1eadn \u0111\u1ec1u cho sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi l\u00f4 h\u1ea1t nguy\u00ean s\u1ea3n v\u00e0 \u0111\u1ea1i tr\u00e0. L\u00f4 h\u1ea1t c\u1ee7a c\u00e1c gia \u0111\u00ecnh Keo l\u00e1 li\u1ec1m thu t\u1eeb v\u01b0\u1eddn gi\u1ed1ng th\u1ebf h\u1ec7 2 Keo l\u00e1 li\u1ec1m c\u00f3 t\u0103ng thu di truy\u1ec1n th\u1ef1c t\u1ebf v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao \u0111\u1ea1t t\u1eeb 9 – 26% so v\u1edbi l\u00f4 h\u1ea1t \u0111\u1ea1i tr\u00e0 v\u00e0 t\u1eeb 1 – 17% so v\u1edbi l\u00f4 h\u1ea1t nguy\u00ean s\u1ea3n. C\u00e1c l\u00f4 h\u1ea1t c\u1ee7a c\u00e1c gia \u0111\u00ecnh 44,13 v\u00e0 46 cho t\u0103ng thu di truy\u1ec1n r\u1ea5t cao v\u1ec1 th\u1ec3 t\u00edch so v\u1edbi l\u00f4 h\u1ea1t s\u1ea3n xu\u1ea5t (80%, 73% v\u00e0 60%) v\u00e0 l\u00f4 h\u1ea1t nguy\u00ean s\u1ea3n (55%, 50% v\u00e0 37%). C\u00e1c l\u00f4 h\u1ea1t cho t\u0103ng thu di truy\u1ec1n th\u1ef1c t\u1ebf cao v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 th\u1ec3 t\u00edch \u0111\u1ec1u c\u00f3 t\u0103ng thu v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y cao h\u01a1n. Ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y c\u1ee7a c\u00e1c l\u00f4 h\u1ea1t 44, 13 v\u00e0 46 c\u0169ng \u0111\u1ea1t t\u0103ng thu t\u1eeb 4 – 24% so v\u1edbi l\u00f4 h\u1ea1t nguy\u00ean s\u1ea3n v\u00e0 t\u1eeb 16 – 39% so v\u1edbi l\u00f4 h\u1ea1t \u0111\u1ea1i tr\u00e0.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo l\u00e1 li\u1ec1m, gi\u1ed1ng nguy\u00ean s\u1ea3n, t\u0103ng thu di truy\u1ec1n th\u1ef1c t\u1ebf<\/td>\n<\/tr>\n

\n

<\/a>Realized genetic gain in growth and stem quality of breed seedsources of Acacia crassicarpa<\/em> compared to natural provenances and commercial seedsources in Quang Tri<\/strong><\/p>\n

To identify the growth and realized genetic gain of Acacia crassicarpa <\/em>seedlots which was collected from the second-generation seed orchard in Cam Lo – Quang Tri compared to natural provenances and commercial seedlot; 09 seedsources was allowed to set up two genetic gain trials in the sandy and hilly areas of Quang Tri. Each trial had an area of \u200b\u200b1 ha, designed incomplete random block experiments, 09 seedlots, 5 replicates, 36 trees\/plot, planting distance of 3 \u00b4 2 m for both sites. The trees in the sandy trial in Le Xuyen had slow growth: the avrage diameter was 1.9 cm, the average height was 2.7 m and the average of volume was 0.6 dm3<\/sup>. The stem quality of different seedsources did not differ significantly in this trial. In the trial of genetic gain of Acacia crassicarpa<\/em> in hilly areas in Cam Lo at 30 months of age, the growth in diameter varied from 5.4 cm to 6.5 cm, height varied from 5.4 m to 6.9 m and volume varies from 6.6 to 12 dm3<\/sup>. Seedlots of families 44, 13 and 46 had superior stem quality, 4.2, 3.6 and 3.7 points respectively compared to the commercial seedlot of 3.4 points. Regarding the realized genetic gain, the seedlots from the second generation seed orchards in Quang Tri and Binh Thuan grew better than natural provenances and commercial seedlot. The seedlots which were collected from SSO2, had realized gains in growth of diameter and height by 9 – 26% compared to the commercial seedlot and 1 – 17% compared to natural provenances. Seedlots of families 44, 13 and 46 showed very high genetic gains in volume compared to the commercial seedlot (80%, 73% and 60%) and natural provenances (55%, 50% and 37%). Families with high genetic gains in diameter, height and volume all experienced higher increases in stem quality parameters. The quality of stems of families 44, 13 and 46 also achieved an increase of 4 – 24% compared to natural provenances and from 16 – 39% compared to commercial seedlot.<\/p>\n

Keywords:<\/em><\/strong> Acasia crassicarpa<\/em>, natural provenances, realized gain<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG V\u00d9 H\u01af\u01a0NG (Cinnamomum balansae <\/em>Lecomte) <\/em>B\u1eb0NG H\u1ea0T<\/p>\n

<\/a>B\u00f9i Th\u1ecd Ti\u1ebfn1<\/sup>, Nguy\u1ec5n Vi\u1ec5n2<\/sup>, Ho\u00e0ng V\u0103n Th\u1eafng2<\/sup>, L\u00ea V\u0103n Quang2<\/sup>,
\nNguy\u1ec5n Th\u1ecb \u00c1nh Nguy\u1ec7t2<\/sup>, Nguy\u1ec5n Ti\u00ean Phong1<\/sup><\/p>\n

1<\/sup> <\/strong>Tr\u01b0\u1eddng Cao \u0111\u1eb3ng C\u00f4ng ngh\u1ec7 v\u00e0 N\u00f4ng l\u00e2m \u0110\u00f4ng B\u1eafc
\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

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m qu\u1ea3, h\u1ea1t v\u00e0 nh\u00e2n gi\u1ed1ng V\u00f9 h\u01b0\u01a1ng b\u1eb1ng h\u1ea1t t\u1ea1i Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p v\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9 \u0111\u00e3 cho th\u1ea5y, qu\u1ea3 V\u00f9 h\u01b0\u01a1ng c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf, trung b\u00ecnh c\u00f3 kho\u1ea3ng 2.279 qu\u1ea3\/kg, m\u1ed7i qu\u1ea3 c\u00f3 ch\u1ee9a 1 h\u1ea1t, kh\u1ed1i l\u01b0\u1ee3ng 1.000 h\u1ea1t dao \u0111\u1ed9ng t\u1eeb 0,35 – 0,38 kg, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u00f3 t\u1eeb 2.632 – 2.857 h\u1ea1t\/kg, trung b\u00ecnh l\u00e0 2.778 h\u1ea1t\/kg. \u0110\u1ed9 thu\u1ea7n h\u1ea1t gi\u1ed1ng c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 dao \u0111\u1ed9ng 80,7 – 85,2%, trung b\u00ecnh l\u00e0 83,4%. Th\u1eed nghi\u1ec7m b\u1ea3o qu\u1ea3n h\u1ea1t theo c\u00e1c th\u00ed nghi\u1ec7m kh\u00e1c nhau \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng, h\u1ea1t V\u00f9 h\u01b0\u01a1ng th\u00edch h\u1ee3p v\u1edbi ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n l\u1ea1nh \u1edf nhi\u1ec7t \u0111\u1ed9 5o<\/sup>C, sau 2 th\u00e1ng b\u1ea3o qu\u1ea3n v\u1eabn cho t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 62,0%. H\u1ea1t V\u00f9 h\u01b0\u01a1ng n\u1ea3y m\u1ea7m t\u1ed1t nh\u1ea5t khi \u0111\u01b0\u1ee3c ng\u00e2m trong n\u01b0\u1edbc \u1ea5m 30o<\/sup>C trong 4 – 6 gi\u1edd, cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m \u0111\u1ea1t t\u1eeb 83,0 – 85,0%. Th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u ph\u00f9 h\u1ee3p v\u1edbi gieo \u01b0\u01a1m V\u00f9 h\u01b0\u01a1ng t\u1eeb h\u1ea1t l\u00e0 98% \u0111\u1ea5t + 2% ph\u00e2n NPK (16:16:8), sau 6 th\u00e1ng cho sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y gi\u1ed1ng V\u00f9 h\u01b0\u01a1ng l\u00e0 t\u1ed1t nh\u1ea5t, \u0111\u1ea1t t\u1ef7 l\u1ec7 s\u1ed1ng 87,8%, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c 0,56 cm v\u00e0 chi\u1ec1u cao 50,4 cm.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o qu\u1ea3n h\u1ea1t, V\u00f9 h\u01b0\u01a1ng, th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u, x\u1eed l\u00fd h\u1ea1t<\/td>\n<\/tr>\n

\n

<\/a>Research on propagation techniques of Cinnamomum balansae <\/em>Lecomte from seeds<\/strong><\/p>\n

The results of the study on the characteristics of the fruit, seeds and propagation Cinnamomum balansae<\/em> by seeds at the Forest Science Centre for Central of North Vietnam showed that, fruit of C.balansae<\/em> is small size, on average, there are about 2,279 fruits\/kg. Each fruit contains 1 seed, the weight of 1,000 seeds ranges from 0.35 to 0.38 kg, equivalent to 2,632 – 2,857 seeds\/kg, an average of 2,778 seeds\/kg. The seed purity of the provenances ranged from 80.7 – 85.2% with an average of 83.4%. Testing of preserving seeds of C.balansae<\/em> according to different experiments has shown that C.balansae<\/em> seed is suitable for store in a refrigerator at a temperature of 5o<\/sup>C, after 2 months of storage, the survival rate of seeds are 62.0%. C.balansae<\/em> seeds germinate best when soaked in warm water at 30o<\/sup>C for 4 – 6 hours, for the germination rate of 83.0 – 85.0%. The potting medium suitable for seedlings for nursery is 98% of soil + 2% of NPK fertilizer (16: 16: 8), after 6 months the growth of C.balansae<\/em> seedlings are the best, reaching the survival rate is 87.8%, the root diameter is 0.56 cm and height is 50.4 cm.<\/p>\n

Keywords:<\/em><\/strong> Cinnamomum balansae <\/em>Lecomte, seed treatment, seed preservation, pot medium<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U KH\u1ea2O NGHI\u1ec6M GI\u1ed0NG V\u00c0 K\u1ef8 THU\u1eacT TR\u1ed2NG TH\u00c2M CANH KEO L\u00c1 TR\u00c0M T\u1ea0I GIA LAI<\/p>\n

<\/a>Tr\u1ea7n Th\u1ecb Th\u00fay H\u1eb1ng, L\u00ea Vi\u1ec7t D\u0169ng<\/p>\n

Trung t\u00e2m L\u00e2m nghi\u1ec7p Nhi\u1ec7t \u0111\u1edbi<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u0110\u1ec1 t\u00e0i \u201cX\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh kh\u1ea3o nghi\u1ec7m gi\u1ed1ng v\u00e0 tr\u1ed3ng r\u1eebng th\u00e2m canh Keo l\u00e1 tr\u00e0m cung c\u1ea5p g\u1ed7 l\u1edbn b\u1eb1ng c\u00e1c gi\u1ed1ng \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn (AA1, AA9, Clt7, Clt18, Clt25, Clt26, Clt1E, Clt1C) t\u1ea1i Pleiku, Gia Lai\u201d, v\u1edbi m\u1ee5c ti\u00eau l\u00e0: (i) X\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c gi\u1ed1ng Keo l\u00e1 tr\u00e0m c\u00f3 tri\u1ec3n v\u1ecdng cho tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn t\u1ea1i Pleiku, Gia Lai; (ii) X\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng th\u00e2m canh Keo l\u00e1 tr\u00e0m cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i Pleiku, Gia Lai. C\u00e1c th\u00ed nghi\u1ec7m v\u00e0 m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean \u0111\u1ea5t bazan tho\u00e1i h\u00f3a t\u1ea1i Tr\u1ea1m th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p Pleiku, Trung t\u00e2m L\u00e2m nghi\u1ec7p nhi\u1ec7t \u0111\u1edbi. K\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m gi\u1ed1ng \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c hai gi\u1ed1ng (d\u00f2ng keo lai AA9 v\u00e0 AA1) ph\u00f9 h\u1ee3p cho tr\u1ed3ng th\u00e2m canh cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i Gia Lai. Th\u00ed nghi\u1ec7m c\u00e1c bi\u1ec7n ph\u00e1p tr\u1ed3ng r\u1eebng th\u00e2m canh Keo l\u00e1 tr\u00e0m cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i Gia Lai cho th\u1ea5y n\u00ean tr\u1ed3ng v\u1edbi m\u1eadt \u0111\u1ed9 1.660 c\u00e2y\/ha v\u00e0 b\u00f3n l\u00e2n v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng 0,3 kg\/g\u1ed1c.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u00f3n ph\u00e2n, <\/strong>kh\u1ea3o nghi\u1ec7m gi\u1ed1ng, m\u1eadt \u0111\u1ed9, m\u00f4 h\u00ecnh, tr\u1ed3ng r\u1eebng th\u00e2m canh, Pleiku<\/td>\n<\/tr>\n

\n

<\/a>Establish models of seeds experiment and intensive planting of Acacia auriculiformis<\/em> for large timber with new approved races at Pleiku, Gia Lai<\/strong><\/p>\n

The reseach project \u201cEstablish models of seeds experiment and intensive planting of Acacia auriculiformis<\/em> for large timber with new approved races (AA1, AA9, Clt7, Clt18, Clt25, Clt26, Clt1E, Clt1C) at Pleiku, Gia Lai\u201d. Objectives of the study are: (i) To select some races of Acacia auriculiformis<\/em>; (ii) To identify infensive technological measures of plantation for large timber. The experiments and plantation models were conducted on degraded basalt soils at Pleiku Experiment Station beloging to Tropical Forest Reseach Centre. Result of race experiment showed two best race of Acacia auriculiformis<\/em> that were AA1 v\u00e0 AA9 wich were appropriate for large timber planting in Gia Lai. Experiments on intensive measures shown that put down 0.3 kg P-fertilizer and panting with density 1.660 trees\/ha were the best measures.<\/p>\n

Keywords:<\/em><\/strong> Density, intensive plantation pattern, fertilizer, Pleiku, race experiment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC C\u1ee6A C\u00c2Y G\u1ee4 LAU (Sindora tonkinensis<\/em> A. Chev. ex K. & S. S. Larsen.) T\u1ea0I QU\u1ea2NG B\u00ccNH<\/p>\n

<\/a>Nguy\u1ec5n H\u1ea3i Th\u00e0nh, Ph\u1ea1m Xu\u00e2n \u0110\u1ec9nh, Nguy\u1ec5n Th\u1ecb Li\u1ec7u, V\u0169 \u0110\u1ee9c B\u00ecnh,
\nL\u00ea C\u00f4ng \u0110\u1ecbnh, H\u00e0 V\u0103n Thi\u1ec7n, L\u00ea Xu\u00e2n To\u00e0n. Ph\u1ea1m Ti\u1ebfn H\u00f9ng<\/p>\n

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

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e2y G\u1ee5 lau \u1edf m\u1ed9t s\u1ed1 tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean t\u1ea1i Qu\u1ea3ng B\u00ecnh cho th\u1ea5y, m\u1eadt \u0111\u1ed9 c\u00e2y G\u1ee5 lau ph\u00e2n b\u1ed1 trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng h\u1ed7n lo\u00e0i l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh dao \u0111\u1ed9ng t\u1eeb 5 – 8 c\u00e2y\/ha, chi\u1ebfm t\u1ef7 l\u1ec7 t\u1eeb 0,7 \u0111\u1ebfn 1,6% t\u1ed5ng s\u1ed1 c\u00e2y v\u00e0 c\u00f3 tr\u1eef l\u01b0\u1ee3ng t\u1eeb 0,59 \u0111\u1ebfn 3,72 m3<\/sup>\/ha. Trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean, G\u1ee5 lau kh\u00f4ng tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh v\u00e0 c\u00f3 ch\u1ec9 s\u1ed1 IV% r\u1ea5t th\u1ea5p t\u1eeb 1,2 – 1,4%. T\u1ea7ng c\u00e2y cao thu\u1ed9c c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng c\u00f3 G\u1ee5 lau ph\u00e2n b\u1ed1 \u0111\u00e3 h\u00ecnh th\u00e0nh m\u1ed9t \u01b0u h\u1ee3p \u1edf tr\u1ea1ng th\u00e1i r\u1eebng th\u01b0\u1eddng xanh gi\u00e0u. Ph\u00e2n b\u1ed1 th\u1ef1c nghi\u1ec7m N\/D1,3<\/sub> c\u1ee7a c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng tu\u00e2n theo ph\u00e2n b\u1ed1 l\u00fd thuy\u1ebft h\u00e0m Kho\u1ea3ng c\u00e1ch, d\u1ea1ng ph\u00e2n b\u1ed1 gi\u1ea3m v\u00e0 c\u00f3 s\u1ed1 c\u00e2y gi\u1ea3m d\u1ea7n khi c\u1ea5p \u0111\u01b0\u1eddng k\u00ednh t\u0103ng l\u00ean. Ph\u00e2n b\u1ed1 l\u00fd thuy\u1ebft N\/Hvn<\/sub> c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi ph\u00e2n b\u1ed1 th\u1ef1c nghi\u1ec7m theo h\u00e0m kho\u1ea3ng c\u00e1ch. Ki\u1ec3u ph\u00e2n b\u1ed1 c\u00e2y r\u1eebng tr\u00ean m\u1eb7t b\u1eb1ng n\u1eb1m ngang \u1edf c\u00e1c l\u00e2m ph\u1ea7n c\u00f3 G\u1ee5 lau l\u00e0 ph\u00e2n b\u1ed1 ng\u1eabu nhi\u00ean. Trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean, G\u1ee5 lau quan h\u1ec7 v\u1edbi nh\u00f3m lo\u00e0i \u01b0u th\u1ebf l\u00e0 ng\u1eabu nhi\u00ean, \u0111\u1ed9c l\u1eadp nhau ngo\u1ea1i tr\u1eeb quan h\u1ec7 v\u1edbi B\u1eddi l\u1eddi v\u00f2ng l\u00e0 quan h\u1ec7 b\u00e0i x\u00edch. M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh \u1edf c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng dao \u0111\u1ed9ng t\u1eeb 10.880 – 13.547 c\u00e2y\/ha, s\u1ed1 lo\u00e0i c\u00e2y t\u00e1i sinh dao \u0111\u1ed9ng t\u1eeb 36 – 50 lo\u00e0i. T\u1ed5 th\u00e0nh c\u00e2y t\u00e1i sinh ch\u1ec9 c\u00f3 2 – 5 lo\u00e0i v\u00e0 G\u1ee5 lau kh\u00f4ng tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh. S\u1ed1 c\u00e2y t\u00e1i sinh c\u1ee7a G\u1ee5 lau \u1edf 3 tr\u1ea1ng th\u00e1i r\u1eebng dao \u0111\u1ed9ng t\u1eeb 107 – 187 c\u00e2y\/ha.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y G\u1ee5 lau, l\u00e2m h\u1ecdc, Qu\u1ea3ng B\u00ecnh, r\u1eebng t\u1ef1 nhi\u00ean.<\/p>\n

 <\/td>\n<\/tr>\n

\n

<\/a>Silvicultural characteristics of Sindora tonkinensis<\/em> A. Chev. ex K. & S. S. Larsen. in Quang Binh province<\/strong><\/p>\n

The results of silvicultural characteristics of Sindora tonkinensis<\/em> A. Chev. ex K. & S. S. Larsen in natural forest in Quang Binh showed that the density of Sindora tonkinensis<\/em> distributed in the evergreen broad-leaved natural forests ranges from 5 to 8 trees\/ha, corresponding to the ratio of 0.7 to 1.6% of total trees and has the volume from 0.59 to 3.72 m3<\/sup>\/ha. In the natural forest, Sindora tonkinensis <\/em>does not participate in the dominant species and has a very low IV% index from 1.2 to 1.4%. The high tree layer belonging to the natural forest which has Sindora tonkinensis<\/em> has formed an advantage in rich evergreen forest. The experimental distribution N\/D1.3<\/sub> of the natural forest followed the theoretical distribution of the Distance function and the number of trees decreased as the diameter class increased. Theoretical distribution of N\/Hvn<\/sub> of the natural forest is not consistent with the experimental distribution according to the distance function. On the horizontal plane, the distribution of the natural forest which has Sindora tonkinensis<\/em> is random. In the natural forest, Sindora tonkinensis<\/em> has random, independent relationship with dominant species; except the relationship with Litsea verticillata<\/em> is the anti-chain relationship. The density of tree regeneration in natural forest ranges from 10,880 to 13,547 trees\/ha, the regenerated species ranges from 36 to 50 species. The regeneration has only 2 – 5 species and Sindora tonkinensis<\/em> is not involved in the dominant species. The number of regenerated trees of Sindora tonkinensis<\/em> in natural forest ranges from 107 to 187 trees\/ha.<\/p>\n

Keywords:<\/strong> Sindora tonkinensis,<\/em> silviculture, Quang Binh, natural forest.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG M\u1ed8T S\u1ed0 LO\u00c0I V\u00c0 XU\u1ea4T X\u1ee8 TR\u00c0M MELALEUCA TR\u1ed2NG TR\u00caN \u0110\u1ea4T PH\u00c8N T\u1ea0I TH\u1ea0NH H\u00d3A – LONG AN<\/p>\n

<\/a>Nguy\u1ec5n Xu\u00e2n H\u1ea3i, V\u0169 \u0110\u00ecnh H\u01b0\u1edfng v\u00e0 Ki\u1ec1u M\u1ea1nh H\u00e0<\/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 sinh tr\u01b0\u1edfng 17 xu\u1ea5t x\u1ee9 c\u1ee7a 5 lo\u00e0i tr\u00e0m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i Th\u1ea1nh H\u00f3a – Long An. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u sau 36 th\u00e1ng tu\u1ed5i cho th\u1ea5y: Lo\u00e0i M.<\/em> alternifolia<\/em> \u0111\u00e3 kh\u00f4ng s\u1ed1ng \u0111\u01b0\u1ee3c trong \u0111i\u1ec1u ki\u1ec7n ng\u1eadp n\u01b0\u1edbc k\u00e9o d\u00e0i
\n(\u2265 1 th\u00e1ng), trong khi \u0111\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a 4 lo\u00e0i tr\u00e0m c\u00f2n l\u1ea1i l\u00e0 M. leucadendra<\/em>, M. cajuputi, M. quiquenervia<\/em> v\u00e0 M. viridiflora <\/em>kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1edbi nhau; Lo\u00e0i M. leucadedra <\/em>c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t v\u1edbi th\u1ec3 t\u00edch c\u00e2y trung b\u00ecnh c\u00e1c xu\u1ea5t x\u1ee9 l\u00e0 4,3 dm3<\/sup>\/c\u00e2y v\u00e0 cao g\u1ea5p ~4 l\u1ea7n so v\u1edbi lo\u00e0i M. quiquenervia<\/em> (1,1 dm3<\/sup>\/c\u00e2y); Tuy nhi\u00ean, gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 c\u1ee7a lo\u00e0i M. leucadendra<\/em> kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 th\u1ec3 t\u00edch. M\u1eb7t kh\u00e1c, \u0111\u1ed1i v\u1edbi lo\u00e0i M. cajuputi<\/em> c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 sinh tr\u01b0\u1edfng gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9; Keru (PNG) l\u00e0 xu\u1ea5t x\u1ee9 c\u00f3 th\u1ec3 t\u00edch c\u00e2y \u0111\u1ea1t cao nh\u1ea5t (5,2 dm3<\/sup>\/c\u00e2y), th\u1ea5p nh\u1ea5t l\u00e0 xu\u1ea5t x\u1ee9 Kalaga (NT) (1,2 dm3<\/sup>\/c\u00e2y). Tr\u00ean v\u00f9ng \u0111\u1ea5t ph\u00e8n \u1edf t\u1ec9nh Long An, M. leucadendra<\/em> l\u00e0 lo\u00e0i ph\u00f9 h\u1ee3p nh\u1ea5t cho tr\u1ed3ng r\u1eebng th\u00e2m canh. Ngo\u00e0i ra, khi tr\u1ed3ng tr\u00e0m M. cajuput<\/em>i<\/em> n\u00ean ch\u1ecdn xu\u1ea5t x\u1ee9 Keru (PNG).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Lo\u00e0i, tr\u00e0m Melaleuca, xu\u1ea5t x\u1ee9<\/td>\n<\/tr>\n

\n

<\/a>Evaluating on growth of some melaleuca species and provenances planting on acid sulpahte soil in Thanh Hoa – Long An<\/strong><\/p>\n

Reserch on 17 provenances of five Melaleuca species undertaken in Thanh Hoa – Long An. After planting 36 months, the results showed that M.<\/em> alternifolia<\/em> species is not alive due to flooded condition (\u2265 1 month), while the survival rate was not significant difference between M. leucadendra, M. cajuputi, M. quiquenervia<\/em> and M. viridiflora; <\/em>Growth of M. leucadendra <\/em>species was highest with volume of provenance average (4.3dm3<\/sup>\/tree), more than four times that compared to M. quiquenervia <\/em>(1.1 dm3<\/sup>\/tree); However, there were not significant differences between provennaces of the M. leucadendra<\/em> species. Nevertheness, tree gowths of the M. cajuputi<\/em> species were significant difference between provenances, in which volume of Keru (PNG) provenence (5.2 dm3<\/sup>\/tree) was the highest and the lowest was Kalaga (NT) provenance (1.2 dm3<\/sup>\/c\u00e2y). On the acid sulphate soil in Long An province, M. leucadendra<\/em> species is suitable for intensive plantation. On the other hand, M. cajuputi<\/em> species should be selected Keru (PNG) provenance for planting.<\/p>\n

Keywords:<\/em><\/strong> Species, Melaleuca, provenance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A M\u1ed8T S\u1ed0 BI\u1ec6N PH\u00c1P K\u1ef8 THU\u1eacT TR\u1ed2NG \u0110\u1ebeN SINH TR\u01af\u1edeNG R\u1eeaNG TR\u1ed2NG SA M\u1ed8C (Cunninghamia lanceolata<\/em> (Lamb.) Hook) \u1ede QU\u1ea2NG NINH<\/p>\n

<\/a>\u0110\u1eb7ng V\u0103n Thuy\u1ebft1<\/sup>, L\u00ea Th\u1ecb Ng\u1ecdc H\u00e02<\/sup>, Nguy\u1ec5n To\u00e0n Th\u1eafng1<\/sup>, \u0110inh H\u1ea3i \u0110\u0103ng1<\/sup>,
\n\u0110\u00e0o Trung \u0110\u1ee9c1<\/sup>, D\u01b0\u01a1ng Quang Trung1<\/sup>, L\u00ea Th\u1ecb H\u1ea1nh1<\/sup>, Tr\u1ea7n Anh H\u1ea3i1<\/sup><\/p>\n

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

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng Sa m\u1ed9c t\u1ea1i Qu\u1ea3ng Ninh \u1edf giai \u0111o\u1ea1n sau tr\u1ed3ng 39 th\u00e1ng cho th\u1ea5y: C\u00e2y Sa m\u1ed9c \u1edf c\u00e1c th\u00ed nghi\u1ec7m tr\u1ed3ng r\u1eebng c\u00f3 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 2,4 – 4,9 cm, chi\u1ec1u cao 1,8 – 3,1 m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n 0,9 – 2 m. \u1ede th\u00ed nghi\u1ec7m l\u00e0m \u0111\u1ea5t tr\u1ed3ng r\u1eebng sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 3,4 – 4,1 cm, cao nh\u1ea5t l\u00e0 4,1 cm \u1edf c\u00f4ng th\u1ee9c \u01104 (cu\u1ed1c h\u1ed1 60 \u00b4 60 \u00b4 60 cm), sinh tr\u01b0\u1edfng chi\u1ec1u cao \u0111\u1ea1t 2,1 – 2,5 m. \u1ede th\u00ed nghi\u1ec7m tu\u1ed5i c\u00e2y con \u0111em tr\u1ed3ng r\u1eebng sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 3,1 – 3,3 cm, chi\u1ec1u cao \u0111\u1ea1t 2 – 2,1 m, sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t cao nh\u1ea5t l\u00e0 3,3 cm \u1edf c\u00f4ng th\u1ee9c TC2 (c\u00e2y con 12 th\u00e1ng tu\u1ed5i) v\u00e0 TC3 (c\u00e2y con 15 th\u00e1ng tu\u1ed5i). \u1ede th\u00ed nghi\u1ec7m m\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 3,3 – 4,9 cm, chi\u1ec1u cao \u0111\u1ea1t 2,3 – 3,1 m, sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t cao nh\u1ea5t l\u00e0 4,9 cm, chi\u1ec1u cao 3,1 m \u1edf c\u00f4ng th\u1ee9c M5 (3.300 c\u00e2y\/ha). \u1ede th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 2,8 – 3,7 cm, chi\u1ec1u cao \u0111\u1ea1t 1,8 – 2,1 m, sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t cao nh\u1ea5t l\u00e0 3,7 cm v\u00e0 chi\u1ec1u cao \u0111\u1ea1t cao nh\u1ea5t 2,1 m \u1edf c\u00f4ng th\u1ee9c P4 (b\u00f3n 110g ur\u00ea + 350 g supe l\u00e2n + 50 g kali). \u1ede th\u00ed nghi\u1ec7m t\u1ec9a c\u00e0nh sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t 2,4 – 2,9 cm, chi\u1ec1u cao \u0111\u1ea1t 1,6 – 1,8 m, sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u0111\u1ea1t cao nh\u1ea5t l\u00e0 2,9 cm, chi\u1ec1u cao \u0111\u1ea1t 1,8 m \u1edf c\u00f4ng th\u1ee9c C3 (t\u1ec9a c\u00e0nh t\u1eeb g\u1ed1c l\u00ean \u0111\u1ed9 cao 30% chi\u1ec1u cao c\u00e2y).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Sa m\u1ed9c, k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng, Qu\u1ea3ng Ninh<\/td>\n<\/tr>\n

\n

<\/a>Effect of planting techniques on the growth of Cunninghamia lanceolata<\/em> (Lamb.) Hook plantations in Quang Ninh province<\/strong><\/p>\n

The results of study planting techniques of Cunninghamia lanceolata<\/em> (Lamb.) Hook in Quang Ninh province after 39 months shows that Cunninghamia lanceolata<\/em> in the plantation experiments had the growth of diameter above the crown (D00<\/sub>) from 2.4 cm to 4.9 cm, the mean of growth stem height (H) from 1.8 m to 3.1 m, and the mean of canopy diameter (Dt<\/sub>) from 0.9 m to 2 m. In land preparation techniques experiments, the growth of D00<\/sub> was measured from 3.4 cm to 4.1 cm, the highest (4.1 cm) at D4 treatment of hole size (60 \u00b4 60 \u00b4 60 cm) was recorded, the growth of H in those experiments was from 2.1 m to 2.5 m. Seedlings age experiments obtained D00<\/sub> was from 3.1 cm to 3.3 cm, the highest D00<\/sub> was 3.3 cm at TC2 treatment (12 – months-old seedling), and TC3 treatment (15 – months-old seedling). The height of tree seedlings age experiments recorded from 2.0 m to 2.1 m. D00<\/sub> in planting density experiment was recorded from 3.3 cm to 4.9 cm, and H was from 2.3 m to 3.1 m. The highest D00 <\/sub>(4.9 cm) and highest H (3.1 m) at a planting density of 3,300 trees ha-1<\/sup> were recorded. In the fertilization experiments, D00<\/sub> of tree observed was from 2.8 cm to 3.7 cm, and H from 1.8 m to 2.1 m. The highest mean of D00 <\/sub>(3.7 cm) and the highest mean stem height (2.1 m) was found in P4 treatment of applying 110gram urea + 350gram super phosphate + 50gram potassium. In pruning experiments, D00<\/sub> oscillated from 2.4 cm to 2.9 cm, and stem height fluctuated from 1.6 m to 2.9 m. The highest D00 <\/sub>(2.9 cm) and the highest H (1.8 m) were found in C3 treatment (pruning from base to 30% height of the tree).<\/p>\n

Keywords:<\/em><\/strong> Cunninghamia lanceolata<\/em> Lamb. Hook, planting techniques, Quang Ninh province.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A QU\u1ea2N L\u00dd V\u1eacT LI\u1ec6U H\u1eeeU C\u01a0 SAU KHAI TH\u00c1C V\u00c0 B\u00d3N PH\u00c2N \u0110\u1ebeN SINH TR\u01af\u1edeNG V\u00c0 \u0110\u1ed8 PH\u00cc \u0110\u1ea4T R\u1eeaNG TR\u1ed2NG B\u1ea0CH \u0110\u00c0N LAI UP (E.<\/em> urophylla <\/em>\u00d7<\/em> E<\/em>. pellita<\/em>) GIAI \u0110O\u1ea0N 5 N\u0102M TU\u1ed4I T\u1ea0I Y\u00caN B\u00c1I<\/p>\n

<\/a><\/a>Nguy\u1ec5n Ti\u1ebfn Linh1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i1<\/sup>, Tr\u1ea7n L\u00e2m \u0110\u1ed3ng2<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh2<\/sup>,
\nD\u01b0\u01a1ng Quang Trung2<\/sup>, Tr\u1ea7n Anh H\u1ea3i2<\/sup>, Ho\u00e0ng Th\u1ecb Nhung2<\/sup>, Tr\u1ea7n H\u1ed3ng V\u00e2n2<\/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 L\u00e2m sinh<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

N\u0103ng su\u1ea5t v\u00e0 \u0111\u1ed9 ph\u00ec \u0111\u1ea5t sau m\u1ed9t s\u1ed1 chu k\u1ef3 r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n c\u00f3 nguy c\u01a1 suy tho\u00e1i cao n\u1ebfu qu\u1ea3n l\u00fd l\u1eadp \u0111\u1ecba kh\u00f4ng t\u1ed1t. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e1nh gi\u00e1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ed3ng th\u1eddi c\u1ee7a hai nh\u00e2n t\u1ed1 b\u00f3n ph\u00e2n v\u00e0 qu\u1ea3n l\u00fd v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c (VLHCSKT) \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 t\u00ednh ch\u1ea5t \u0111\u1ea5t r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n lai UP 5 n\u0103m tu\u1ed5i \u0111\u01b0\u1ee3c tr\u1ed3ng tr\u00ean \u0111\u1ea5t tho\u00e1i h\u00f3a sau kinh doanh nhi\u1ec1u chu k\u1ef3 b\u1ea1ch \u0111\u00e0n t\u1ea1i Y\u00ean B\u00e1i. K\u1ebft qu\u1ea3 theo d\u00f5i sinh tr\u01b0\u1edfng t\u1eeb tu\u1ed5i 1 \u0111\u1ebfn 5 cho th\u1ea5y, b\u00f3n ph\u00e2n theo nhu c\u1ea7u c\u1ee7a c\u00e2y c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t t\u1edbi sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng. C\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n t\u1eeb c\u00e1c lo\u1ea1i ph\u00e2n \u0111\u01a1n bao g\u1ed3m ph\u00e2n h\u1eefu c\u01a1 vi sinh, \u0111\u1ea1m ur\u00ea, super l\u00e2n v\u00e0 kali c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t so v\u1edbi c\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n NPK th\u01b0\u1eddng \u00e1p d\u1ee5ng trong th\u1ef1c ti\u1ec5n. B\u00f3n ch\u1ebf ph\u1ea9m sinh h\u1ecdc c\u00f3 t\u00e1c d\u1ee5ng ph\u00e2n gi\u1ea3i l\u00e2n v\u00e0 xenlulo th\u00e0nh c\u00e1c ch\u1ea5t d\u1ec5 ti\u00eau cho c\u00e2y tr\u1ed3ng, nh\u01b0ng c\u00f3 sinh tr\u01b0\u1edfng k\u00e9m h\u01a1n do th\u00ed nghi\u1ec7m kh\u00f4ng b\u00f3n b\u1ed5 sung ph\u00e2n. Tuy nhi\u00ean, sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y tr\u1ed3ng ch\u01b0a c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00f4ng th\u1ee9c \u0111\u1ed1t v\u00e0 kh\u00f4ng \u0111\u1ed1t v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c. Ca\u0301c ti\u0301nh ch\u00e2\u0301t \u0111\u1ea5t thay \u0111\u00f4\u0309i ro\u0303 r\u00ea\u0323t t\u1eeb sau khi tr\u1ed3ng r\u1eebng \u0111\u1ebfn giai \u0111o\u1ea1n 5 n\u0103m tu\u1ed5i la\u0300 pH, mu\u0300n, \u0111a\u0323m va\u0300 l\u00e2n. pH gi\u1ea3m nh\u1eb9; m\u00f9n t\u0103ng nh\u1eb9; \u0111\u1ea1m \u1ed5n \u0111\u1ecbnh; kali trao \u0111\u1ed5i gi\u1ea3m nh\u1eb9; l\u00e2n d\u1ec5 ti\u00eau gi\u1ea3m li\u00ean t\u1ee5c, co\u0301 th\u00ea\u0309 la\u0300 do hi\u00ea\u0323n t\u01b0\u01a1\u0323ng c\u00f4\u0301 \u0111\u1ecbnh l\u00e2n trong \u0111\u00e2\u0301t. Ch\u01b0a co\u0301 s\u01b0\u0323 sai kha\u0301c ro\u0303 r\u00ea\u0323t v\u00ea\u0300 ti\u0301nh ch\u00e2\u0301t \u0111\u00e2\u0301t gi\u01b0\u0303a c\u00f4ng th\u01b0\u0301c \u0111\u00f4\u0301t va\u0300 kh\u00f4ng \u0111\u00f4\u0301t va\u0300 gi\u01b0\u0303a ca\u0301c c\u00f4ng th\u01b0\u0301c bo\u0301n ph\u00e2n cho \u0111\u00ea\u0301n giai \u0111oa\u0323n r\u01b0\u0300ng 5 tu\u00f4\u0309i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Qu\u1ea3n l\u00fd l\u1eadp \u0111\u1ecba, tr\u1ed3ng l\u1ea1i r\u1eebng sau khai th\u00e1c, suy tho\u00e1i \u0111\u1ea5t r\u1eebng tr\u1ed3ng, b\u1ea1ch \u0111\u00e0n lai UP<\/td>\n<\/tr>\n

\n

<\/a><\/a>Effects of slash and litter management and fertilizer practices on growth and soil chemical properties of eucalyptus hybrid (E. urophylla \u00d7 E. pellita<\/em>) 5 years old in Yen Bai province<\/strong><\/p>\n

Decline of yield and soil fertility of eucalypt plantations are associated with unsustainable site management practices. This study tested the simultaneous effects of fertilizers and slash management on growth and soil properties of 5 – year-old Eucalyptus hybrid (E. urophylla<\/em> \u00b4 E. pellita<\/em>) planted on degraded land after several rotations of eucaltypt plantations in Yen Bai provinces. The growth data collected annually from ages 1 to 5 showed that application of fertilizers based on specific demand of the trees have a significant effect on growth rate. Fertilizer mixed from single elements including micronized organic fertilizers, urea, super phosphate and potassium fertilizers have the best growth rate compared to the NPK fertilizers commonly used in practice. Applying microorganism-inoculated products has better effect on phosphorus mineralisation and cellulose decomposition into available minerals for plant uptake, but with poorer growth rate due to lack of fertilizer application. The growth rate was not significant different between the slash and litter burning and non-burning treatments for land preparation. Soil organic carbon and some soil chemical properties such as pH, nitrogen and phosphorus have significantly changed after tree planting. Total soil organic carbon and nitrogen increased slightly after tree planting due to decomposition of organic matters from slash and litter, but in the second and third years, they decreased significantly. Extractable phosphorus continuously reduced since tree planting, which is associated with soil phosphorus immobilisation. There is not significant different in the soil properties between the burned and non-burned treatments and between fertilizer treatments up to 5 years of ages.<\/p>\n

Keywords: <\/em><\/strong>Plantation site management, multi-rotation plantation management, degraded plantation forest land, Eucalyptus <\/em>urophylla \u00d7<\/em> E<\/em>. pellita<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>PH\u00c2N T\u00cdCH C\u00c1C NH\u00c2N T\u1ed0 \u1ea2NH H\u01af\u1edeNG T\u1edaI CH\u00c1Y R\u1eeaNG V\u00c0 PH\u00c2N V\u00d9NG TR\u1eccNG \u0110I\u1ec2M CH\u00c1Y R\u1eeaNG T\u1ea0I T\u1ec8NH \u0110\u1ed2NG NAI<\/p>\n

<\/a>D\u01b0\u01a1ng Huy Kh\u00f4i1<\/sup>, Tr\u1ea7n Quang B\u1ea3o2<\/sup>, Nguy\u1ec5n Th\u1ecb Hoa3<\/sup>,
\nV\u00f5 Minh Ho\u00e0n3<\/sup>, Nguy\u1ec5n V\u0103n Qu\u00fd3<\/sup><\/p>\n

1<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Ph\u00f2ng ch\u00e1y Ch\u1eefa ch\u00e1y
\n2 Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n3 Ph\u00e2n hi\u1ec7u Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u1ed3ng Nai<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

T\u1ec9nh \u0110\u1ed3ng Nai c\u00f3 di\u1ec7n t\u00edch r\u1eebng v\u00e0 \u0111\u1ea5t l\u00e2m nghi\u1ec7p l\u00e0 199.981 ha, trong nh\u1eefng n\u0103m qua tr\u00ean \u0111\u1ecba b\u00e0n th\u01b0\u1eddng xuy\u00ean x\u1ea3y ra ch\u00e1y r\u1eebng. B\u00e0i b\u00e1o n\u00e0y ph\u00e2n t\u00edch c\u00e1c nh\u00e2n t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u00e1y r\u1eebng v\u00e0 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 ph\u00e2n v\u00f9ng nguy c\u01a1 ch\u00e1y r\u1eebng cho t\u1ec9nh \u0110\u1ed3ng Nai. S\u1eed d\u1ee5ng d\u1eef li\u1ec7u th\u1ee9 c\u1ea5p, ph\u1ecfng v\u1ea5n nh\u1eefng \u0111\u1ed1i t\u01b0\u1ee3ng li\u00ean quan v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u kh\u00f4ng gian cho th\u1ea5y: C\u00e1c nh\u00e2n t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u00e1y r\u1eebng ch\u1ee7 y\u1ebfu l\u00e0 th\u1eddi ti\u1ebft, \u0111\u1eb7c \u0111i\u1ec3m c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng, \u0111\u1ecba h\u00ecnh. Nguy c\u01a1 ch\u00e1y r\u1eebng cao \u1edf t\u1ec9nh \u0110\u1ed3ng Nai th\u01b0\u1eddng t\u1eadp trung t\u1eeb th\u00e1ng 1 \u0111\u1ebfn th\u00e1ng 4 h\u00e0ng n\u0103m. B\u1ea3n \u0111\u1ed3 ph\u00e2n c\u1ea5p nguy c\u01a1 ch\u00e1y r\u1eebng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb 7 nh\u00e2n t\u1ed1: L\u1edbp ph\u1ee7 th\u1ef1c v\u1eadt, nhi\u1ec7t \u0111\u1ed9, kho\u1ea3ng c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u01b0\u1eddng giao th\u00f4ng, \u0111\u1ed9 d\u1ed1c, \u0111\u1ed9 cao, h\u01b0\u1edbng d\u1ed1c v\u00e0 th\u1ee7y v\u0103n. B\u1ea3n \u0111\u1ed3 ph\u00e2n v\u00f9ng nguy c\u01a1 ch\u00e1y r\u1eebng th\u00e0nh 5 c\u1ea5p, trong \u0111\u00f3 r\u1eebng c\u00f3 kh\u1ea3 n\u0103ng ch\u00e1y th\u1ea5p chi\u1ebfm di\u1ec7n t\u00edch l\u1edbn nh\u1ea5t v\u1edbi trung b\u00ecnh l\u00e0 38%, r\u1eebng c\u00f3 nguy c\u01a1 ch\u00e1y cao v\u00e0 r\u1ea5t cao chi\u1ebfm kho\u1ea3ng 8,4%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ch\u00e1y r\u1eebng, m\u00f9a ch\u00e1y r\u1eebng, ph\u00e2n v\u00f9ng tr\u1ecdng \u0111i\u1ec3m ch\u00e1y r\u1eebng, GIS v\u00e0 vi\u1ec5n th\u00e1m, \u0110\u1ed3ng Nai<\/td>\n<\/tr>\n

\n

<\/a>Analyzing the factors effecting on forest fire and mapping the forest fire risk zone in Dong Nai province<\/strong><\/p>\n

Dong Nai province has an area of \u200b\u200b199,981 ha of forest and forestry land, in which in the past years, forest fires often occurred. The paper analyzes the causes of forest fires and makes a map of forest fire risk zones for Dong Nai province. Using secondary data, interviewing key informants and analyzing spatial data show that: Factors affecting forest fires are mainly weather, characteristics of forest conditions, slash and burn cultivation and burning agricultural residues. High risk of forest fire usually occurs from January to April every year. A map of forest fire risk zone is established from 7 factors: Vegetation cover, temperature, access distance, slope, topography, aspect and hydrology. The map divides the zone risk of forest fire into 5 levels, of which the low risk zone of forest fire are account for the largest area with an average of 38%, high and very high risk zone of forest fire are account for about 8.4%.<\/p>\n

Keywords:<\/em><\/strong> Forest fire, forest fire season, mapping forest fire risk zone, GIS and remote sensing, Dong Nai province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 HI\u1ec6U QU\u1ea2 KINH T\u1ebe C\u00c1C M\u00d4 H\u00ccNH N\u00d4NG L\u00c2M K\u1ebeT H\u1ee2P T\u1ea0I KON TUM<\/p>\n

<\/a>Nguy\u1ec5n Thanh S\u01a1n1<\/sup>, Ho\u00e0ng Th\u1ecb Nhung1<\/sup>, Ph\u1ea1m \u0110\u00ecnh S\u00e2m1<\/sup>, Nguy\u1ec5n H\u1eefu Th\u1ecbnh1<\/sup>,
\nTr\u1ea7n Ho\u00e0ng Qu\u00fd1<\/sup>, H\u00e0 Th\u1ecb Mai1<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh1<\/sup>, H\u1ed3 Trung L\u01b0\u01a1ng1<\/sup>, Ph\u1ea1m Ti\u1ebfn D\u0169ng1<\/sup>, Tr\u1ea7n H\u1ed3ng V\u00e2n1<\/sup>, C\u00e1p Th\u1ebf Ki\u1ec7t2<\/sup>, Ph\u1ea1m Th\u1ecb Xu\u00e2n Th\u00f9y3<\/sup>.<\/p>\n

1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\n2<\/sup>Ph\u00f2ng NN & PTNT huy\u1ec7n Kon Plong, t\u1ec9nh Kon Tum
\n3<\/sup>C\u00f4ng ty TNHH D\u1ecbch v\u1ee5 – K\u1ef9 thu\u1eadt N\u00f4ng nghi\u1ec7p xanh Kon Tum, t\u1ec9nh Kon Tum.<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 kinh t\u1ebf c\u00e1c m\u00f4 h\u00ecnh n\u00f4ng l\u00e2m k\u1ebft h\u1ee3p (NLKH) \u0111i\u1ec3n h\u00ecnh tr\u00ean \u0111\u1ecba b\u00e0n t\u1ec9nh Kon Tum. Ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 kinh t\u1ebf th\u00f4ng qua vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c ch\u1ec9 s\u1ed1 NPV, BCR v\u00e0 DPP v\u1edbi m\u1ee9c chi\u1ebft kh\u1ea5u \u00e1p d\u1ee5ng r = 6,5%\/n\u0103m. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch \u0111\u00e1nh gi\u00e1 cho th\u1ea5y t\u1ea5t c\u1ea3 27 m\u00f4 h\u00ecnh \u0111\u1ec1u c\u00f3 t\u1ed5ng l\u00e3i r\u00f2ng (NPV) > 0. Trong \u0111\u00f3 NPV c\u00f3 s\u1ef1 dao \u0111\u1ed9ng r\u1ea5t l\u1edbn t\u1eeb m\u00f4 h\u00ecnh l\u00e2m nghi\u1ec7p (LN) (B\u1eddi l\u1eddi \u0111\u1ecf) thu\u1ea7n ch\u1ec9 \u0111\u1ea1t 79 tri\u1ec7u\/ha cho chu k\u1ef3 kinh doanh 25 n\u0103m \u0111\u1ebfn m\u00f4 h\u00ecnh n\u00f4ng nghi\u1ec7p c\u00f4ng ngh\u1ec7 cao (NNCNC) (B\u00ed Nh\u1eadt) c\u00f3 c\u00f9ng th\u1eddi gian kinh doanh nh\u01b0ng NPV \u0111\u1ea1t t\u1edbi 14.391 tri\u1ec7u\/ha. M\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh \u0111em l\u1ea1i l\u00e3i r\u00f2ng NPV l\u1edbn v\u00e0 th\u1eddi gian thu h\u1ed3i v\u1ed1n nhanh th\u01b0\u1eddng l\u00e0 c\u00e1c m\u00f4 h\u00ecnh c\u1ea7n v\u1ed1n \u0111\u1ea7u t\u01b0 l\u1edbn. C\u00e1c m\u00f4 h\u00ecnh c\u00f3 v\u1ed1n \u0111\u1ea7u t\u01b0 nh\u1ecf th\u00ec th\u1eddi gian ho\u00e0n v\u1ed1n th\u01b0\u1eddng k\u00e9o d\u00e0i h\u01a1n. C\u00e1c m\u00f4 h\u00ecnh c\u00f3 ti\u1ec1m n\u0103ng \u0111em l\u1ea1i t\u1ed5ng l\u00e3i r\u00f2ng l\u1edbn v\u00e0 th\u1eddi gian thu h\u1ed3i v\u1ed1n nhanh \u0111a ph\u1ea7n c\u00f3 y\u1ebfu t\u1ed1 d\u01b0\u1ee3c li\u1ec7u v\u1edbi c\u00e1c c\u00e2y nh\u01b0 \u0110inh l\u0103ng Polyscias\u00a0fruticosa)<\/em>, S\u00e2m d\u00e2y (Codonopsis <\/em>sp.) v\u00e0 \u0110\u01b0\u01a1ng quy (<\/em>Angelica sinensis<\/em>)<\/em>. Tuy nhi\u00ean, nh\u1eefng c\u00e2y d\u01b0\u1ee3c li\u1ec7u n\u00e0y m\u1edbi ch\u1ec9 \u0111\u01b0\u1ee3c tr\u1ed3ng m\u1ed9t c\u00e1ch t\u1ef1 ph\u00e1t v\u1edbi quy m\u00f4 nh\u1ecf trong v\u00e0i n\u0103m tr\u1edf l\u1ea1i \u0111\u00e2y n\u00ean th\u1ecb tr\u01b0\u1eddng (m\u1ea1ng l\u01b0\u1edbi thu mua c\u00f2n manh m\u00fan) ch\u01b0a \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh. V\u00ec v\u1eady, \u0111\u1ec3 ph\u00e1t tri\u1ec3n v\u00e0 nh\u00e2n r\u1ed9ng c\u00e1c m\u00f4 h\u00ecnh NLKH c\u00f3 c\u00e2y d\u01b0\u1ee3c li\u1ec7u c\u1ea7n c\u00f3 s\u1ef1 li\u00ean k\u1ebft c\u1ee7a 4 nh\u00e0 (Qu\u1ea3n l\u00fd; doanh nghi\u1ec7p; s\u1ea3n xu\u1ea5t v\u00e0 khoa h\u1ecdc) c\u00f9ng x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n v\u00f9ng nguy\u00ean li\u1ec7u, ch\u1ebf bi\u1ebfn v\u00e0 th\u01b0\u01a1ng m\u1ea1i nh\u1eb1m t\u1ea1o l\u1eadp th\u01b0\u01a1ng hi\u1ec7u v\u00e0 ch\u1ec9 d\u1eabn \u0111\u1ecba l\u00fd cho s\u1ea3n ph\u1ea9m \u0111\u1eb7c h\u1eefu c\u1ee7a \u0111\u1ecba ph\u01b0\u01a1ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Hi\u1ec7u qu\u1ea3 kinh t\u1ebf, m\u00f4 h\u00ecnh n\u00f4ng l\u00e2m k\u1ebft h\u1ee3p, Kon Tum<\/td>\n<\/tr>\n

\n

<\/a>Assessing the economic efficiency of typical agroforestry models in Kon Tum<\/strong><\/p>\n

This study aims to evaluate the economic efficiency of typical agroforestry models in Kon Tum province. The method is used to evaluate economic efficiency through the use of the indicators NPV, BCR and DPP with a discount rate applied r = 6.5%\/year. The analysis and evaluation results showed that all 27 models have total net profit (NPV) > 0. The total net profit has a large variation among models from the model of pure forest plantation (Litsea glutinosa<\/em>) with a total net profit only reached 79 million per hectare for a 25 year business cycle to the model NNCNC (Japan Green Pumpkin) has the same business time but NPV reaches 14,391 million per hectare. Some models with large NPV and fast payback times are often the models that require a large amount of investment capital. Others make smaller investments and the payback period is longer. The models with the potential to bring a large total net profit and the fast payback period mostly have medicinal factors such as Polyscias fruticosa<\/em>, Codonopsis <\/em>sp. and Angelica sinensis<\/em>. However, these medicinal plants have only been grown spontaneously on a small scale in the past few years, so the market (the purchasing network is still fragmented) has not been shaped. Therefore, in order to develop and replicate the models of medicinal plants, it is necessary to have the help of relevant agencies in building markets, brands and geographical indications for endemic medicinal products of the region.<\/p>\n

Keywords:<\/em><\/strong> Economic efficiency, agroforestry model, Kon Tum<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A \u0110I\u1ec0U KI\u1ec6N NU\u00d4I C\u1ea4Y \u0110\u1ebeN M\u1eacT \u0110\u1ed8 T\u1ebe B\u00c0O C\u1ee6A S\u00c1U CH\u1ee6NG VI KHU\u1ea8N SINH M\u00c0NG NH\u1ea6Y<\/p>\n

<\/a>V\u0169 V\u0103n \u0110\u1ecbnh, Ph\u1ea1m V\u0103n Nh\u1eadt, Nguy\u1ec5n Th\u1ecb Loan, Tr\u1ea7n Nh\u1eadt T\u00e2n<\/p>\n

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 khu\u1ea9n sinh m\u00e0ng nh\u1ea7y (polysacarit) c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c gi\u1eef \u1ea9m \u0111\u1ea5t v\u00e0 v\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng. Trong qu\u00e1 tr\u00ecnh sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n, vi khu\u1ea9n sinh m\u00e0ng nh\u1ea7y ti\u1ebft ra polysacarit sinh h\u1ecdc c\u00f3 kh\u1ea3 n\u0103ng gi\u1eef \u1ea9m cho \u0111\u1ea5t. M\u00e0ng nh\u1ea7y c\u1ee7a vi sinh v\u1eadt c\u00f3 vai tr\u00f2 r\u1ea5t quan tr\u1ecdng trong c\u1ea3i t\u1ea1o \u0111\u1ea5t v\u00e0 gi\u1eef \u1ea9m cho \u0111\u1ea5t. Nghi\u00ean c\u1ee9u n\u00e0y x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n thi\u0301ch h\u01a1\u0323p \u0111\u1ec3 nu\u00f4i c\u1ea5y c\u00e1c ch\u1ee7ng vi khu\u1ea9n sinh m\u00e0ng nh\u1ea7y; \u0111\u00e2y l\u00e0 c\u01a1 s\u1edf khoa h\u1ecdc nh\u1eb1m m\u1ee5c \u0111\u00edch nghi\u00ean c\u1ee9u s\u1ea3n xu\u1ea5t ch\u1ebf ph\u1ea9m gi\u1eef \u1ea9m \u0111\u1ea5t v\u00e0 v\u1eadt li\u1ec7u ch\u00e1y d\u01b0\u1edbi t\u00e1n r\u1eebng th\u00f4ng. 6 ch\u1ee7ng vi khu\u1ea9n sinh m\u00e0ng nh\u1ea7y g\u1ed3m P08, P16.1, P09, P36 (Bacillus aryabhattai<\/em>), P54.1 (Paenibacillus polymyxa) <\/em>v\u00e0 ch\u1ee7ng P73 (Paenibacillus jamilae<\/em>) sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n ph\u00f9 h\u1ee3p nh\u1ea5t tr\u00ean m\u00f4i tr\u01b0\u1eddng AT l\u1ecfng, pH = 7, t\u1ed1c \u0111\u1ed9 l\u1eafc 150 v\u00f2ng\/ph\u00fat trong 72 gi\u1edd \u1edf nhi\u1ec7t \u0111\u1ed9 25o<\/sup>C; m\u1eadt \u0111\u1ed9 t\u1ebf b\u00e0o \u0111\u1ea1t 109 <\/sup>(cfu\/ml).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110i\u1ec1u ki\u1ec7n nu\u00f4i c\u1ea5y, m\u00e2\u0323t \u0111\u00f4\u0323 t\u00ea\u0301 ba\u0300o, vi khu\u1ea9n sinh m\u00e0ng nh\u1ea7y<\/td>\n<\/tr>\n

\n

<\/a>Research on affects of submerged culture condition to cell density of six strains polysaccharide synthesized bacteria<\/strong><\/p>\n

Polysaccharide synthesized bacteria play an important role in moisturizing of soil and burning materials under forest canopy. In the process of growth and development, polysaccharide synthesized bacteria secrete biological polysaccharides that hold moisture in the soil. Mucous membranes of microorganisms play an important role in soil improvement and soil moisture. This study has identified appropriate submerged culture condition of polysaccharide synthesized bacteria. This is the scientific basis for the purpose of researching and manufacturing inoculants to keep humidity of soil and flammable materials under the canopy of pine forests. Six strains of polysaccharide synthesized bacteria include P08, P16.1, P09, P36 (Bacillus aryabhattai<\/em>), P54.1 (Paenibacillus polymyxa), <\/em>and strain P73 (Paenibacillus jamilae<\/em>) grow and develop most appropriately on liquid AT medium, pH = 7, shaking speed of 150 rpm for 72 hours at 25o<\/sup>C, cell density reaches 109 <\/sup>(cfu\/ml).<\/p>\n

Keywords:<\/em><\/strong> Submerged culture condition, cell density, polysaccharide synthesized bacteria<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TH\u00c0NH PH\u1ea6N LO\u00c0I, \u0110\u1eb6C \u0110I\u1ec2M G\u00c2Y H\u1ea0I V\u00c0 T\u1eacP T\u00cdNH M\u1ed8T S\u1ed0 LO\u00c0I S\u00c2U H\u1ea0I TRE B\u00c1T \u0110\u1ed8 T\u1ea0I HUY\u1ec6N TR\u1ea4N Y\u00caN, T\u1ec8NH Y\u00caN B\u00c1I<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Th\u00e0nh, L\u00ea V\u0103n B\u00ecnh, \u0110\u00e0o Ng\u1ecdc Quang, Tr\u1ea7n Xu\u00e2n H\u01b0ng,
\nTr\u1ea7n Vi\u1ebft Th\u1eafng v\u00e0 Trang A T\u1ed5ng<\/p>\n

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

Th\u00e0nh ph\u1ea7n lo\u00e0i s\u00e2u h\u1ea1i tre B\u00e1t \u0111\u1ed9 t\u1ea1i huy\u1ec7n Tr\u1ea5n Y\u00ean, t\u1ec9nh Y\u00ean B\u00e1i ghi nh\u1eadn \u0111\u01b0\u1ee3c 12 lo\u00e0i, thu\u1ed9c 10 h\u1ecd v\u00e0 05 b\u1ed9. B\u1ed9 C\u00e1nh v\u1ea9y ghi nh\u1eadn 05 h\u1ecd, 05 lo\u00e0i; b\u1ed9 C\u00e1nh n\u1eeda 02 h\u1ecd, 03 lo\u00e0i. B\u1ed9 C\u00e1nh th\u1eb3ng, b\u1ed9 C\u00e1nh c\u1ee9ng v\u00e0 b\u1ed9 Hai c\u00e1nh \u0111\u1ec1u ghi nh\u1eadn \u0111\u01b0\u1ee3c 01 h\u1ecd v\u00e0 t\u01b0\u01a1ng \u1ee9ng s\u1ed1 lo\u00e0i l\u00e0 02, 01 v\u00e0 01 lo\u00e0i. T\u1ef7 l\u1ec7 b\u1ecb h\u1ea1i trung b\u00ecnh c\u1ee7a c\u00e1c lo\u00e0i s\u00e2u h\u1ea1i t\u1eeb 5,8 – 20,6% v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb h\u1ea1i b\u00ecnh qu\u00e2n t\u1eeb 0,05 – 0,93 (\u0111\u1ec1u \u1edf m\u1ee9c \u0111\u1ed9 nh\u1eb9 +). Lo\u00e0i B\u1ecd x\u00edt l\u1edbn (Notobitus meleagris<\/em>) g\u00e2y h\u1ea1i ch\u1ee7 y\u1ebfu \u1edf m\u0103ng, v\u1ecb tr\u00ed con \u0111\u1ef1c khi giao ph\u1ed1i v\u1edbi con c\u00e1i th\u01b0\u1eddng g\u1ea7n \u1edf ph\u00eda ng\u1ecdn non c\u1ee7a m\u0103ng. Tr\u01b0\u1edfng th\u00e0nh c\u00e1i th\u01b0\u1eddng \u0111\u1ebb tr\u1ee9ng \u1edf m\u1eb7t d\u01b0\u1edbi l\u00e1 ho\u1eb7c ngay t\u1ea1i m\u0103ng (sau khi \u0103n b\u1ed5 sung) v\u1edbi s\u1ed1 l\u01b0\u1ee3ng t\u1eeb 10 \u0111\u1ebfn 22 qu\u1ea3; tr\u1ee9ng \u0111\u01b0\u1ee3c \u0111\u1ebb th\u00e0nh 2 h\u00e0ng n\u1eb1m so le nhau. S\u00e2u non c\u1ee7a lo\u00e0i Ch\u00e2u ch\u1ea5u tre (Hieroglyphus tonkinensis<\/em>) m\u1edbi n\u1edf th\u01b0\u1eddng s\u1ed1ng t\u1eadp trung, th\u1eddi gian t\u1eeb khi tr\u01b0\u1edfng th\u00e0nh \u0111\u1ef1c v\u00e0 c\u00e1i giao ph\u1ed1i \u0111\u1ebfn khi \u0111\u1ebb \u1ed5 tr\u1ee9ng \u0111\u1ea7u ti\u00ean dao \u0111\u1ed9ng t\u1eeb 5 – 8 ng\u00e0y, trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a tr\u01b0\u1edfng th\u00e0nh c\u00e1i ch\u00fang giao ph\u1ed1i t\u1eeb 1 – 3 l\u1ea7n v\u00e0 \u0111\u1ebb t\u1eeb 1 \u0111\u1ebfn 4 \u1ed5 tr\u1ee9ng; m\u1ed7i \u1ed5 tr\u1ee9ng th\u01b0\u1eddng c\u00f3 s\u1ed1 l\u01b0\u1ee3ng t\u1eeb 28 \u0111\u1ebfn 41 qu\u1ea3. Lo\u00e0i V\u00f2i voi l\u1edbn (Cyrtotrachelus longimanus<\/em>) ph\u00e1 ho\u1ea1i tr\u00ean m\u0103ng, nh\u1eefng c\u00e2y m\u0103ng cao t\u1eeb 1,2 – 1,7 m th\u01b0\u1eddng b\u1ecb h\u1ea1i n\u1eb7ng. Tr\u01b0\u1edfng th\u00e0nh d\u00f9ng v\u00f2i \u0111\u1ee5c v\u00e0o m\u0103ng sau \u0111\u00f3 \u0111\u1ebb tr\u1ee9ng t\u1ea1i khu v\u1ef1c \u0111\u00f3. S\u00e2u non khi m\u1edbi n\u1edf \u0111\u1ee5c t\u1eeb d\u01b0\u1edbi g\u1ed1c m\u0103ng \u0111\u1ee5c l\u00ean, \u0111\u1ebfn tu\u1ed5i th\u00e0nh th\u1ee5c s\u00e2u non t\u1ea1o 1 l\u1ed7 r\u1ed9ng kho\u1ea3ng 1 cm \u0111\u1ec3 chui xu\u1ed1ng \u0111\u1ea5t v\u00e0 v\u00e0o nh\u1ed9ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> G\u00e2y h\u1ea1i, t\u1eadp t\u00ednh, th\u00e0nh ph\u1ea7n s\u00e2u h\u1ea1i, tre B\u00e1t \u0111\u1ed9, Tr\u1ea5n Y\u00ean<\/td>\n<\/tr>\n

\n

<\/a>Species composition, harmful characteristics and behavior of some Bat Do bamboo pests in Tran Yen district, Yen Bai province<\/strong><\/p>\n

The composition of Bat do bamboo shoots pest in Tran Yen district, Yen Bai province recorded 12 species, belonging to 10 families and 05 orders. Orders of Lepidoptera recorded 05 families, 05 species; Hemiptera with 02 families, 03 species. Orthoptera, Coleoptera and Diptera all have 01 family and represent the number of species as 02, 01 and 01 species. The average pest prevalence of pests ranged from 5.8 – 20.6% and the average level of damage ranged from 0.05 – 0.93 (both mildly). Notobitus meleagris<\/em> damage mainly in bamboo shoots. The position of male when mating with female is usually near the young tip of bamboo shoot. Females usually lay eggs on the underside of leaves or on shoots (after supplementation) with numbers from 10 to 22 eggs; The eggs are laid in two staggered rows. Larva of Hieroglyphus tonkinensis<\/em> usually live in concentration, the time from adult of male and female to laying the first nest varies from 5 – 8 days, throughout the life cycle of the female adult mate 1 – 3 times and lay from 1 to 4 eggs nest; Each nest usually has between 28 and 41 eggs. Cyrtotrachelus longimanus<\/em> species infestation on bamboo shoots, the bamboo shoots from 1.2 to 1.7 m in height are often severely damaged. Adults use a hose to chisel on bamboo shoots and then lay eggs in that area. Young larva, when hatching, chisel up from under the base of bamboo shoots. When they reach maturity, them create a hole about 1 cm wide to burrow into the ground and pupate.<\/p>\n

Keywords:<\/em><\/strong> Hamful, behavior, composition pests, Bat do bamboo, Tran Yen district<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U PH\u00d2NG CH\u1ed0NG CH\u00c2U CH\u1ea4U M\u00cdA CH\u00c0Y XANH (Hieroglyphus tonkinensis <\/em>Bolivar) H\u1ea0I LU\u1ed2NG (Dendrocalamus barbatus<\/em>) \u1ede PH\u00da TH\u1ecc B\u1eb0NG CH\u1ebe PH\u1ea8M SINH H\u1eccC<\/p>\n

<\/a>B\u00f9i Quang Ti\u1ebfp1<\/sup>, Tr\u1ea7n Thanh Tr\u0103ng1<\/sup>, Phan V\u0103n S\u01a1n2<\/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<\/sup> Ki\u1ec3m l\u00e2m Thanh S\u01a1n, Ph\u00fa Th\u1ecd<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u ph\u00f2ng ch\u1ed1ng Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh (<\/strong>Hieroglyphus tonkinensis<\/em> Bolivar) \u1edf \u0111i\u1ec1u ki\u1ec7n b\u00e1n hoang d\u00e3 (nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh t = 27,5 – 29,5o<\/sup>C, \u0111\u1ed9 \u1ea9m trung b\u00ecnh RH = 67,8 – 75,9%) \u0111\u01b0\u1ee3c th\u00ed nghi\u1ec7m v\u1edbi 7 c\u00f4ng th\u1ee9c theo 2 c\u00e1ch phun th\u1eed nghi\u1ec7m (phun ch\u1ebf ph\u1ea9m n\u1ea5m v\u00e0o th\u1ee9c \u0103n v\u00e0 c\u01a1 th\u1ec3 \u1ea5u tr\u00f9ng; phun v\u00e0o th\u1ee9c \u0103n sau 30 ph\u00fat m\u1edbi th\u1ea3 \u1ea5u tr\u00f9ng). C\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m g\u1ed3m: CT1<\/sub> ch\u1ebf ph\u1ea9m n\u1ea5m xanh (l\u1ee5c c\u01b0\u01a1ng) Metarhizium anisopliae<\/em> (Ma) (2g\/100 ml)\/30 \u1ea5u tr\u00f9ng c\u1ea5p tu\u1ed5i 1 – 2; CT2<\/sub> ch\u1ebf ph\u1ea9m n\u1ea5m tr\u1eafng (b\u1ea1ch c\u01b0\u01a1ng) Beauveria bassiana<\/em> (Bb) (2g\/100 ml)\/30 \u1ea5u tr\u00f9ng c\u1ea5p tu\u1ed5i 1 – 2; CT3<\/sub> ch\u1ebf ph\u1ea9m n\u1ea5m Ma (2g\/100 ml)\/30 \u1ea5u tr\u00f9ng c\u1ea5p tu\u1ed5i 3 – 4; CT4<\/sub> ch\u1ebf ph\u1ea9m n\u1ea5m Bb (2g\/100 ml)\/30 \u1ea5u tr\u00f9ng c\u1ea5p tu\u1ed5i 3 – 4; CT5<\/sub> ch\u1ebf ph\u1ea9m n\u1ea5m Ma (2g\/100 ml)\/30 \u1ea5u tr\u00f9ng c\u1ea5p tu\u1ed5i 5 – 6; CT6<\/sub> ch\u1ebf ph\u1ea9m n\u1ea5m Bb (2g\/100 ml)\/30 \u1ea5u tr\u00f9ng c\u1ea5p tu\u1ed5i 5 – 6; CT\u0110C<\/sub> \u0111\u1ed1i ch\u1ee9ng phun n\u01b0\u1edbc l\u00e3, th\u00ed nghi\u1ec7m l\u1eb7p l\u1ea1i 3 l\u1ea7n. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y sau 21 ng\u00e0y phun ch\u1ebf ph\u1ea9m n\u1ea5m Ma \u1edf c\u1ea3 2 ph\u01b0\u01a1ng ph\u00e1p t\u1ef7 l\u1ec7 ch\u1ebft \u1edf CT1<\/sub> t\u1eeb 87,66% \u0111\u1ebfn 93,25%, \u1edf CT3<\/sub> t\u1eeb 74,02 – 78,62%, \u1edf CT5<\/sub> t\u1eeb 60,62 – 69,06%. \u0110\u1ed1i v\u1edbi ch\u1ebf ph\u1ea9m n\u1ea5m Bb \u1edf c\u00e1c CT2<\/sub>, CT4<\/sub> v\u00e0 CT6<\/sub> l\u1ea7n l\u01b0\u1ee3t l\u00e0 80,95 – 85,36%, 70,91 – 75,88% v\u00e0 60,62 – 63,95%. Bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh b\u1eb1ng ch\u1ebf ph\u1ea9m n\u1ea5m Ma v\u00e0 n\u1ea5m Bb m\u1eb7c d\u00f9 kh\u00f4ng c\u00f3 hi\u1ec7u qu\u1ea3 cao trong th\u1eddi gian \u0111\u1ea7u nh\u01b0ng c\u00f3 th\u1ec3 h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c s\u1ed1 l\u01b0\u1ee3ng qu\u1ea7n th\u1ec3 \u1ea5u tr\u00f9ng Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh m\u1ed9t c\u00e1ch r\u00f5 r\u1ec7t sau 7 ng\u00e0y phun \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u1ea5p tu\u1ed5i 1 – 2.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ch\u00e2u ch\u1ea5u m\u00eda ch\u00e0y xanh, ch\u1ebf ph\u1ea9m n\u1ea5m Beauveria bassiana<\/em> v\u00e0 Metarhizium anisopliae<\/em>, Lu\u1ed3ng, ph\u00f2ng ch\u1ed1ng<\/td>\n<\/tr>\n

\n

<\/a>Reseacch of control on locust (Hieroglyphus tonkinensis <\/em>Bolivar) damaging to bamboo (Dendrocalamus barbatus<\/em>) by biological product<\/strong><\/p>\n

Research of control on the locust in semi-wild condition (t = 27.7 – 29.5o<\/sup>C, RH = 67.8 – 75.9%) is made 7 formulae with 2 trial spraying approaches (spraying biological product of Metarhizium anisopliae <\/em>(Ma), Beauveria bassiana <\/em>(Bb) on food and body of the locust at the same time; spraying the biological products on food after 30 minutes letting out the locust0. The formulae including: CT1<\/sub> (Ma 2g\/100 ml\/30 first and second lavae), CT2<\/sub> (Bb 2g\/100 ml\/30 first and second lavae), CT3<\/sub> (Ma 2g\/100 ml\/30 third and fourth lavae), CT4<\/sub> (Bb 2g\/100 ml\/30 third and fourth lavae), CT5<\/sub> (Ma 2g\/100 ml\/30 fifth and sixth lavae), CT6<\/sub> (Bb 2g\/100 ml\/30 fifth and sixth lavae and CT\u0110C <\/sub>(control, only spraying water), the experiements were repeated 3 times. Result showed that within 21 Ma spraying days at the 2 approaches, mortalities of treated locusts in the CT1<\/sub> from 87.66% to 93.25%, in the CT3<\/sub> from 74.02% to 78.62% and in CT5 between 60.62% and 69.06%. With Bb in the CT2<\/sub>, CT4<\/sub> and CT6<\/sub> percentage of killed locust are 80.95 – 85.36%, 70.91 – 75.88% and 60.62 – 63.95% respectively. Although biological control by Ma and Bb did not immediately have affectiveness, these approaches should be applied to strongly reduced population of the locust after 7 treated days especially to the first and second lavae.<\/p>\n

Keywords:<\/em><\/strong> Hieroglyphus tonkinensis,<\/em> biological product Beauveria bassiana<\/em> and Metarhizium anisopliae, Dendrocalamus barbatus<\/em>, control<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U C\u1ea2I TI\u1ebeN H\u1ec6 TH\u1ed0NG DI \u0110\u1ed8NG M\u00c1Y K\u00c9O L\u00c0M VI\u1ec6C TR\u00caN \u0110\u1ea4T N\u00d4NG, L\u00c2M NGHI\u1ec6P<\/p>\n

<\/a>T\u00f4 Qu\u1ed1c Huy1<\/sup>, \u0110o\u00e0n V\u0103n Thu1<\/sup>, B\u00f9i Vi\u1ec7t \u0110\u1ee9c2<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam,
\n2<\/sup> H\u1ecdc vi\u1ec7n N\u00f4ng nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u00e2n t\u00edch, \u0111\u00e1nh gi\u00e1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c th\u00f4ng s\u1ed1 k\u1ebft c\u1ea5u h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng m\u00e1y k\u00e9o b\u00e1nh h\u01a1i Janmar F535D \u0111\u1ebfn kh\u1ea3 n\u0103ng k\u00e9o b\u00e1m v\u00e0 \u1ed5n \u0111\u1ecbnh khi l\u00e0m vi\u1ec7c tr\u00ean \u0111\u1ea5t d\u1ed1c l\u00e2m nghi\u1ec7p, tr\u00ean c\u01a1 s\u1edf \u0111\u00f3 x\u00e1c \u0111\u1ecbnh ph\u01b0\u01a1ng \u00e1n v\u00e0 t\u00ednh to\u00e1n c\u00e1c th\u00f4ng s\u1ed1 thi\u1ebft k\u1ebf c\u1ea3i ti\u1ebfn. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng c\u1ee7a chi\u1ec1u cao tr\u1ecdng t\u00e2m, b\u1ec1 r\u1ed9ng c\u01a1 s\u1edf v\u00e0 h\u1ec7 s\u1ed1 b\u00e1m \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh ngang v\u00e0 c\u00e1c ch\u1ec9 ti\u00eau l\u00e0m vi\u1ec7c c\u1ee7a li\u00ean h\u1ee3p m\u00e1y Janmar F535D v\u1edbi c\u00e0y ch\u1ea3o ch\u0103m s\u00f3c r\u1eebng. Ph\u01b0\u01a1ng \u00e1n thi\u1ebft k\u1ebf c\u1ea3i ti\u1ebfn l\u00e0 thay \u0111\u1ed5i k\u1ebft c\u1ea5u h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng \u0111\u1ec3 h\u1ea1 th\u1ea5p tr\u1ecdng t\u00e2m (hT<\/sub>), t\u0103ng b\u1ec1 r\u1ed9ng c\u01a1 s\u1edf (B) v\u00e0 h\u1ec7 s\u1ed1 b\u00e1m (\u03c6) c\u1ee7a m\u00e1y k\u00e9o, c\u1ee5 th\u1ec3: hT<\/sub> gi\u1ea3m t\u1eeb 1,05 m xu\u1ed1ng 0,96 m; B t\u0103ng t\u1eeb 1,30 m l\u00ean 1,63 m v\u00e0 \u03c6 t\u0103ng t\u1eeb 0,690 l\u00ean 0,737. H\u1ec7 th\u1ed1ng di \u0111\u1ed9ng c\u1ea3i ti\u1ebfn \u0111\u00e3 n\u00e2ng cao g\u00f3c gi\u1edbi h\u1ea1n l\u1eadt ngang \u03b2 t\u1eeb 20,80<\/sup> l\u00ean 31,30<\/sup>; hi\u1ec7u su\u1ea5t k\u00e9o t\u0103ng 8%, n\u0103ng su\u1ea5t t\u0103ng 8,7% v\u00e0 chi ph\u00ed c\u00f4ng tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch c\u00e0y gi\u1ea3m 7,5% so v\u1edbi li\u00ean h\u1ee3p m\u00e1y (LHM) l\u1eafp h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng nguy\u00ean b\u1ea3n. LHM c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c \u0111\u01b0\u1ee3c \u1edf g\u00f3c d\u1ed1c \u0111\u1ebfn 13,60<\/sup> v\u1edbi l\u1ef1c c\u1ea3n c\u00e0y Pc<\/sub> = 4500 N, t\u0103ng 4,60<\/sup> so v\u1edbi LHM l\u1eafp h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng nguy\u00ean b\u1ea3n (9,00<\/sup>). Ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 trang b\u1ecb b\u1ed5 sung h\u1ec7 th\u1ed1ng di \u0111\u1ed9ng c\u1ea3i ti\u1ebfn cho m\u1ed9t s\u1ed1 m\u00e1y k\u00e9o n\u00f4ng nghi\u1ec7p t\u01b0\u01a1ng t\u1ef1 \u0111\u1ec3 l\u00e0m vi\u1ec7c tr\u00ean \u0111\u1ea5t d\u1ed1c l\u00e2m nghi\u1ec7p.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> H\u1ec7 th\u1ed1ng di \u0111\u1ed9ng, kh\u1ea3 n\u0103ng k\u00e9o b\u00e1m v\u00e0 \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u00e1y k\u00e9o, m\u00e1y k\u00e9o tr\u00ean \u0111\u1ea5t d\u1ed1c<\/td>\n<\/tr>\n

\n

<\/a>The self movement system improvement of a tractor working on farm and forest terrain<\/strong><\/p>\n

This study has analysed and assessed the impacts of the constructional specifications of the moving system of Yanmar F535D rubber tractor to the traction-gripping capacity and the system stability when the tractor worked on the steep forest terrain. Based on those specifications, the calculation methods of improvement and design parameters are identified. The study results have identified the influent level of gravity center height, basic width and friction index to the across stability and other working indexs of Yanmar F535D agrimotor system assembled with a two gang disc plow working on steep terrain. The designing plan focuses on the improvement of the self-movement system to reduce the gravity center (ht<\/sub>) from 1.05 m to 0.96 m, increase the basic width (B) from 1.30 m to 1.63 m and friction index (\u03c6) from 0.690 to 0.737. Compared to the original system of the tractor, the improved system has demonstrated an increment of the across overturn angle \u03b2 from 20.80<\/sup> to 31.30<\/sup>; traction efficiency of 8.0%, productivity of 8.7% and and decrement of labor cost per an area unit of 7.5%. LHM can work at the slope up to 13.6\u00b0 with the resistance force of
\nPc<\/sub> = 4500 N, an increment of 4.5\u00b0 compared to that of the original system (9.00<\/sup>). As the result, the improvement self-movement system for some similar tractors to operate on the steep forest terrain.<\/p>\n

Keywords:<\/em><\/strong> self-movement system, tractor gripping and stability capacity, tractor on steep terrain<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 5 – 2020 1. T\u0103ng thu di truy\u1ec1n th\u1ef1c t\u1ebf v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y c\u1ee7a m\u1ed9t s\u1ed1 gi\u1ed1ng Keo l\u00e1 li\u1ec1m so v\u1edbi gi\u1ed1ng nguy\u00ean s\u1ea3n v\u00e0 \u0111\u1ea1i tr\u00e0 t\u1ea1i Qu\u1ea3ng Tr\u1ecb Realized genetic gain in growth and stem quality of breed seedsources of […]<\/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\/2191"}],"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=2191"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2191\/revisions"}],"predecessor-version":[{"id":2396,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2191\/revisions\/2396"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}