{"id":2470,"date":"2023-06-27T11:39:49","date_gmt":"2023-06-27T04:39:49","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2470"},"modified":"2024-05-17T10:35:18","modified_gmt":"2024-05-17T03:35:18","slug":"vietnam-journal-of-forest-science-number-2-2023","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2023\/06\/vietnam-journal-of-forest-science-number-2-2023\/","title":{"rendered":"Vietnam Journal of Forest Science Number 2-2023"},"content":{"rendered":"

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

<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 <\/strong>2<\/strong> – <\/strong>20<\/strong>2<\/strong>3<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nKh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u00f3 ph\u1ea3i l\u00e0 t\u00ednh tr\u1ea1ng ti\u1ec1m n\u0103ng trong c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 Keo l\u00e1 li\u1ec1m
\n\u1edf mi\u1ec1n Trung<\/td>\n		Basic density and modulus of elasticity as potential traits in improvement of wood quality of Acacia crassicarpa<\/em> in Central Vietnam<\/td>\nPh\u00ed H\u1ed3ng H\u1ea3i
\nLa \u00c1nh D\u01b0\u01a1ng
\nL\u00ea Xu\u00e2n To\u00e0n<\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh c\u00e2y m\u00f9 u (Calophyllum inophyllum<\/em> L.) b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p<\/td>\nResearch on propagation of Calophyllum inophyllum<\/em> L. utilizing grafting techniques<\/td>\nTr\u1ea7n H\u1eefu Bi\u1ec3n
\nNguy\u1ec5n Tr\u1ecdng T\u00e0i
\nPh\u00f9ng V\u0103n T\u1ec9nh
\nNguy\u1ec5n Th\u1ecb Hi\u1ebfu<\/td>\n		12<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh c\u00e2y B\u00e1ch v\u00e0ng (Xanthocyparis vietnamensis<\/em> Farjon & N.T.Hiep) ph\u1ee5c v\u1ee5 c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n<\/td>\nResearch on clonal propagation of golden cypress (Xanthocyparis vietnamensis<\/em> Farjon & N.T.Hiep) for conservation<\/td>\nB\u00f9i Tr\u1ecdng Th\u1ee7y
\n\u0110\u1eb7ng Th\u1ecb Tuy\u1ebft
\nNguy\u1ec5n C\u00f4ng Ph\u01b0\u01a1ng
\nTr\u01b0\u01a1ng Ng\u1ecdc Long
\nV\u0169 Qu\u00fd \u0110\u00f4ng<\/td>\n		20<\/td>\n<\/tr>\n
4.<\/td>\nTh\u1ef1c tr\u1ea1ng tr\u1ed3ng v\u00e0 khai th\u00e1c Re g\u1eebng t\u1ea1i m\u1ed9t s\u1ed1 t\u1ec9nh ph\u00eda B\u1eafc<\/td>\nAfforestation and exploitation status of Cinnamomum bejolghota<\/em> (Buch-Ham) in some Northern provinces<\/td>\nL\u1ea1i Thanh H\u1ea3i
\nNguy\u1ec5n H\u1eefu Th\u1ecbnh
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nH\u1ed3 Trung L\u01b0\u01a1ng
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nNguy\u1ec5n Thanh S\u01a1n
\nH\u00e0 Th\u1ecb Mai
\nTr\u1ea7n H\u1ed3ng V\u00e2n
\nV\u0169 Ti\u1ebfn L\u00e2m
\nNguy\u1ec5n Th\u00f9y D\u01b0\u01a1ng<\/td>\n		30<\/td>\n<\/tr>\n
5.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n
\nv\u00e0 n\u01b0\u1edbc t\u01b0\u1edbi \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t m\u1ee7 c\u1ee7a r\u1eebng tr\u1ed3ng Tr\u00f4m (Sterculia foetida<\/em> L.) t\u1ea1i v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung B\u1ed9<\/td>\n		Effects of fertilizers and irrigation water on the growth and yield of gum plantations (Sterculia foetida<\/em> L.) in the South-Central arid region<\/td>\nPh\u00f9ng V\u0103n Khang
\nPh\u00f9ng V\u0103n Khen
\nNguy\u1ec5n Tr\u1ecdng Nam
\nNguy\u1ec5n Qu\u1ed1c \u0110\u1ea1t
\nL\u00ea Tri\u1ec7u Duy
\nTr\u1ea7n V\u0103n Nho<\/td>\n		40<\/td>\n<\/tr>\n
6.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a lo\u00e0i Nghi\u1ebfn g\u00e2n ba t\u1ea1i t\u1ec9nh Th\u00e1i Nguy\u00ean<\/td>\nSilvicultural chracteristics of Excentrodendron tonkinensis<\/em> in Thai Nguyen province, Vietnam<\/td>\nD\u01b0\u01a1ng V\u0103n Th\u1ea3o
\nV\u0169 V\u0103n Th\u00f4ng<\/td>\n		47<\/td>\n<\/tr>\n
7.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 ph\u00e2n chia l\u1eadp \u0111\u1ecba c\u00e1t ven bi\u1ec3n l\u00e0m c\u01a1 s\u1edf tr\u1ed3ng r\u1eebng ph\u00f2ng h\u1ed9 t\u1ea1i t\u1ec9nh Tr\u00e0 Vinh<\/td>\nStudying the characteristics and site division of coastal sandy soils as a basis for planting protection forests in Tra Vinh province<\/td>\nHo\u00e0ng V\u0103n Th\u01a1i
\n\u0110inh Thi\u0323 Thu\u0301y Vy
\nL\u00ea Thanh Quang
\nNguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u
\n\u0110inh Duy Tu\u00e2\u0301n<\/td>\n		56<\/td>\n<\/tr>\n
8.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m sinh s\u1ea3n c\u1ee7a lo\u00e0i S\u00e2u \u0103n l\u00e1 (Antheraea frithi moore<\/em>) g\u00e2y h\u1ea1i c\u00e2y d\u1ea7u r\u00e1i v\u00e0 sao \u0111en t\u1ea1i Th\u00e0nh ph\u1ed1
\nH\u1ed3 Ch\u00ed Minh<\/td>\n		Fertility characteristics
\nof Antheraea frithi moore<\/em> damaging Dipterocarpus alatus<\/em> and Hopea odorata<\/em>
\nin Ho Chi Minh city<\/td>\n		Nguy\u1ec5n Th\u1ecb H\u1ea3i H\u1ed3ng
\nNguy\u1ec5n V\u0103n Th\u00e0nh
\nTr\u01b0\u01a1ng C\u00f4ng L\u1ef1c
\nL\u00ea Th\u1ecb Nghi\u00eam
\nB\u00f9i Th\u1ecb Gia H\u00e2n
\nTr\u1ea7n Th\u1ecb M\u1ef9 Duy\u00ean<\/td>\n		68<\/td>\n<\/tr>\n
9.<\/td>\nPreliminary report of a parasitoid wasp on Achaea serva<\/em> in CoTo island,
\nQuang Ninh province<\/td>\n		B\u01b0\u1edbc \u0111\u1ea7u ghi nh\u1eadn ong k\u00fd sinh Glyptapanteles<\/em> sp. (Hymenoptera: Braconidae) tr\u00ean s\u00e2u \u0103n l\u00e1 Ch\u00f5i t\u1ea1i C\u00f4 T\u00f4, Qu\u1ea3ng Ninh<\/td>\nPham Duy Long
\nNguyen Dinh Chung,
\nBui Van Bac
\nVu Van Loi
\nPham Thi Thu Thuy
\nNguyen Minh Chi<\/td>\n		77<\/td>\n<\/tr>\n
10.<\/td>\nK\u1ebft qu\u1ea3 th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n t\u0103ng c\u01b0\u1eddng n\u0103ng l\u1ef1c gi\u00e1m \u0111\u1ecbnh g\u1ed7 cho Vi\u1ec7t Nam<\/td>\nResults of the implementation of the Project enhancing capacity of wood identification and screening for Vietnam<\/td>\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nPh\u1ea1m \u0110\u1ee9c Chi\u1ebfn
\nHo\u00e0ng Nguy\u1ec5n Vi\u1ec7t Hoa
\nB\u00f9i Duy Ng\u1ecdc
\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nNguy\u1ec5n B\u1ea3o Ng\u1ecdc
\nNguy\u1ec5n T\u1eed Kim
\nV\u0169 Th\u1ecb H\u1ed3ng Th\u1eafm<\/td>\n		85<\/td>\n<\/tr>\n
11.<\/td>\nNghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng
\nc\u1ee7a th\u00f4ng s\u1ed1 c\u00f4ng ngh\u1ec7 \u00e9p ph\u1eb3ng \u0111\u1ebfn m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd c\u1ee7a v\u1eadt li\u1ec7u composite g\u1ed7 – nh\u1ef1a t\u1eeb ph\u1ebf ph\u1ee5 ph\u1ea9m sau ch\u1ebf bi\u1ebfn g\u1ed7 k\u1ebft h\u1ee3p v\u1edbi r\u00e1c th\u1ea3i nh\u1ef1a HDPE<\/td>\n		Researching the effect of technology parameter of press on some mechanical and physical characteristics of wooden – plastic composite materials from wood processing waste combined with HDPE plastic waste<\/td>\nNguy\u1ec5n Tr\u1ecdng Ngh\u0129a
\nNguy\u1ec5n V\u0103n \u0110\u1ecbnh
\n\u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc<\/td>\n		93<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>KH\u1ed0I L\u01af\u1ee2NG RI\u00caNG V\u00c0 M\u00d4 \u0110UN \u0110\u00c0N H\u1ed2I\u00a0C\u00d3 PH\u1ea2I L\u00c0 T\u00cdNH TR\u1ea0NG TI\u1ec0M N\u0102NG
\nTRONG C\u1ea2I THI\u1ec6N CH\u1ea4T L\u01af\u1ee2NG G\u1ed6 KEO L\u00c1 LI\u1ec0M \u1ede MI\u1ec0N TRUNG<\/p>\n

<\/a>Ph\u00ed H\u1ed3ng H\u1ea3i1<\/sup>, La \u00c1nh D\u01b0\u01a1ng2<\/sup> v\u00e0 L\u00ea Xu\u00e2n To\u00e0n3<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n<\/sup>2 <\/sup>Vi\u1ec7n NC Gi\u1ed1ng v\u00e0 CNSH L\u00e2m nghi\u1ec7p
\n3 <\/sup>Trung t\u00e2m KHLN B\u1eafc Trung B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u0110\u00e1nh gi\u00e1 bi\u1ebfn d\u1ecb v\u00e0 kh\u1ea3 n\u0103ng di truy\u1ec1n c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u1ee7a c\u00e1c gia \u0111\u00ecnh Keo l\u00e1 li\u1ec1m \u1edf tu\u1ed5i 9 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb 200 c\u00e2y thu\u1ed9c 50 gia \u0111\u00ecnh ch\u1ecdn ng\u1eabu nhi\u00ean t\u1eeb 81 gia \u0111\u00ecnh trong kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf Keo l\u00e1 li\u1ec1m t\u1ea1i Nam \u0110\u00e0n, Ngh\u1ec7 An. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3 \u1edf kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, nh\u01b0ng kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t \u1edf m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i gi\u1eefa c\u00e1c xu\u1ea5t x\u1ee9 c\u0169ng nh\u01b0 gia \u0111\u00ecnh. Xu\u1ea5t x\u1ee9 Cape Melville v\u00e0 Luncida (QLD) l\u00e0 nh\u1eefng xu\u1ea5t x\u1ee9 c\u00f3 ti\u1ec1m n\u0103ng cao trong ph\u00e1t tri\u1ec3n tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn ch\u1ea5t l\u01b0\u1ee3ng cao. H\u1ec7 s\u1ed1 di truy\u1ec1n v\u00e0 h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng di truy\u1ec1n l\u0169y t\u00edch \u0111\u1ea1t m\u1ee9c \u0111\u1ed9 r\u1ea5t cao cho kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (h2<\/sup> = 0,78; CVa<\/sub> = 16,8%), nh\u01b0ng th\u1ea5p cho m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i (h2<\/sup> = 0,17; CVa<\/sub> = 8,0%). Do v\u1eady c\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang l\u00e0 nh\u1eefng t\u00ednh tr\u1ea1ng c\u00f3 ti\u1ec1m n\u0103ng r\u1ea5t cao, trong khi m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u00f3 kh\u1ea3 n\u0103ng di truy\u1ec1n th\u1ea5p h\u01a1n trong c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 \u1edf lo\u00e0i Keo l\u00e1 li\u1ec1m t\u1ea1i mi\u1ec1n Trung. T\u01b0\u01a1ng quan di truy\u1ec1n gi\u1eefa t\u00ednh tr\u1ea1ng sinh tr\u01b0\u1edfng v\u1edbi c\u00e1c t\u00ednh ch\u1ea5t g\u1ed7 c\u0169ng ch\u1ec9 ra r\u1eb1ng c\u00e1c t\u00ednh tr\u1ea1ng sinh tr\u01b0\u1edfng kh\u00f4ng c\u00f3 t\u01b0\u01a1ng quan v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i. Ph\u00e1t tri\u1ec3n c\u00e1c v\u01b0\u1eddn gi\u1ed1ng h\u1eefu t\u00ednh ho\u1eb7c v\u01b0\u1eddn gi\u1ed1ng v\u00f4 t\u00ednh nh\u01b0 qu\u1ea7n th\u1ec3 nh\u00e2n gi\u1ed1ng h\u1ea1t nh\u00e2n \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t nh\u1eb1m cung c\u1ea5p h\u1ea1t gi\u1ed1ng ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u1ec3 \u0111em l\u1ea1i t\u0103ng thu di truy\u1ec1n \u0111\u00e1ng k\u1ec3 cho tr\u1ed3ng r\u1eebng Keo l\u00e1 li\u1ec1m.<\/td>\n<\/tr>\n

\n

<\/a>Basic density and modulus of elasticity as potential traits in improvement of wood quality of Acacia crassicarpa <\/em>in Central Vietnam<\/strong><\/p>\n

200 trees of 50 families were randomly selected from 81 families at the age of 9 in and Acacia crassicarpa<\/em> progeny test at Nam Dan (Nghe An) for evaluating variation and inheritability of wood basic density and dynamic elastic modulus and then applicating these results to breeding improvement programs in the North Central. The results showed that there was significant differences in basic density, but non-significant differences in modulus of elasticity between both provenances and families. Provenance of Cape Melville v\u00e0 Luncida (QLD) showed high potential to develop high-quality timber plantations. Heritability and coefficient of additive genetic variation were a very high level for basic density (h2 <\/sup>= 0.78; CVa<\/sub> = 16.8%), but low for dynamic modulus of elasticity (h2<\/sup> = 0.17; CVa <\/sub>= 8.0%). Therefore, it could be confirmed that basic density will be a potential trait to improve, while the dynamic modulus of elasticity will be more difficult to improve wood quality in the studied species in Central Vietnam. Genetic correlation between growth traits and wood properties also indicates that growth traits were independent traits with both basic density and dynamic modulus of elasticity. Development of seed orchards or clonal seed orchards as nuclear breeding populations would be suggested to provide significant benefits in A. crassicarpa<\/em> breeding.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG V\u00d4 T\u00cdNH\u00a0C\u00c2Y M\u00d9 U (Calophyllum inophyllum <\/em>L.) B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P GH\u00c9P<\/p>\n

<\/a>Tr\u1ea7n H\u1eefu Bi\u1ec3n1<\/sup>, Nguy\u1ec5n Tr\u1ecdng T\u00e0i1<\/sup>, Ph\u00f9ng V\u0103n T\u1ec9nh1<\/sup>, Nguy\u1ec5n Th\u1ecb Hi\u1ebfu2<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9
\n2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Ph\u00e2n hi\u1ec7u t\u1ea1i t\u1ec9nh \u0110\u1ed3ng Nai<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u00f9 u l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y nhi\u1ec7t \u0111\u1edbi \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf 38 qu\u1ed1c gia tr\u1ea3i d\u00e0i t\u1eeb \u0110\u00f4ng Phi \u0111\u1ebfn \u0110\u00f4ng Nam \u00c1, ch\u00e2u \u0110\u1ea1i D\u01b0\u01a1ng v\u00e0 Nam Th\u00e1i B\u00ecnh D\u01b0\u01a1ng. M\u00f9 u l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2y \u0111a m\u1ee5c \u0111\u00edch v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf v\u1edbi v\u00f9ng ven bi\u1ec3n nhi\u1ec7t \u0111\u1edbi. Lo\u00e0i n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c tr\u1ed3ng l\u00e0m c\u00e2y ven \u0111\u01b0\u1eddng \u0111\u1ec3 l\u1ea5y b\u00f3ng m\u00e1t v\u00e0 ch\u1eafn gi\u00f3 nh\u1edd t\u00e1n r\u1ed9ng; b\u00ean c\u1ea1nh \u0111\u00f3 g\u1ed7 lo\u00e0i n\u00e0y c\u00f2n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng trong \u0111\u00f3ng t\u00e0u thuy\u1ec1n. M\u1ed9t gi\u00e1 tr\u1ecb quan tr\u1ecdng kh\u00e1c c\u1ee7a c\u00e2y M\u00f9 u l\u00e0 cung c\u1ea5p d\u1ea7u \u00e9p t\u1eeb qu\u1ea3 s\u1eed d\u1ee5ng trong y h\u1ecdc. Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh cho c\u00e1c ki\u1ec3u gen t\u1ed1t l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 \u00fd ngh\u0129a trong vi\u1ec7c ph\u00e1t tri\u1ec3n lo\u00e0i c\u00e2y \u0111a m\u1ee5c \u0111\u00edch n\u00e0y. Tuy nhi\u00ean, cho \u0111\u1ebfn nay ch\u01b0a c\u00f3 nghi\u00ean c\u1ee9u c\u1ee5 th\u1ec3 n\u00e0o v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng \u1edf n\u01b0\u1edbc ta. M\u1ee5c ti\u00eau nghi\u00ean c\u1ee9u nh\u1eb1m x\u00e1c \u0111\u1ecbnh ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p v\u00e0 th\u1eddi v\u1ee5 t\u1ed1t nh\u1ea5t trong nh\u00e2n gi\u1ed1ng M\u00f9 u. V\u1edbi 3 ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p n\u00eam, \u00e1p v\u00e0 m\u1eaft cho th\u1ea5y, ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p m\u1eaft l\u00e0 ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t \u0111\u1ec3 gh\u00e9p M\u00f9 u v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 57%, t\u1ef7 l\u1ec7 b\u1eadt ch\u1ed3i \u0111\u1ea1t 54% v\u00e0 chi\u1ec1u cao ch\u1ed3i gh\u00e9p \u0111\u1ea1t 10,8 cm sau 60 ng\u00e0y gh\u00e9p. M\u00f9a v\u1ee5 gh\u00e9p c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 t\u1ef7 l\u1ec7 b\u1eadt ch\u1ed3i c\u1ee7a ch\u1ed3i gh\u00e9p M\u00f9 u (P-value<\/em> < 0,001). Gh\u00e9p c\u00e2y v\u00e0o m\u00f9a kh\u00f4 cho k\u1ebft qu\u1ea3 t\u1ed1t h\u01a1n v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 63,8%, t\u1ef7 l\u1ec7 b\u1eadt ch\u1ed3i \u0111\u1ea1t 60,5% v\u00e0 chi\u1ec1u cao ch\u1ed3i gh\u00e9p \u0111\u1ea1t 11,2 cm.<\/td>\n<\/tr>\n

<\/a>Research on propagation of Calophyllum inophyllum <\/em>L. utilizing grafting techniques<\/strong><\/p>\n

Calophyllum inophyllum<\/em>\u00a0is a pantropical species tree found in 38 countries stretching from East Africa to Southeast Asia, Oceania and the South Pacific. Calophyllum inophyllum<\/em> is one of the multi-purposes and economically valuable trees in tropical coastal areas, C. inophyllum<\/em> is often planted as a roadside tree to provide shade and as wind breaks with its large canopy; besides, this wood can also be used in shipbuilding. Another important value of the C. inophyllum<\/em> is the supply of oil pressed from the fruit used in medicine. Research on asexual propagation for good genotypes is significant in the development of this multi-purpose plant. However, so far there has not been any specific research on breeding methods in our country. The objective of the study was to determine the best grafting and seasoning method in the propagation of C. inophyllum<\/em>. Research on 3 methods of grafting cleft, splice and budding showed that budding grafting method is the best method for grafting C. inophyllum<\/em> with survival rate of 57%, budding rate of 54% and grafted buds height reaches 4.5 cm after 60 days of grafting. Grafting season had a significant effect on survival rate and budding rate of C. inophyllum<\/em> L.<\/strong> grafted shoots (P-value<\/em> < 0.001). Grafting in the dry season gave better results with a survival rate of 63.8%, budding rate of 60.5% and grafted buds height reaches 11.2 cm.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG V\u00d4 T\u00cdNH\u00a0C\u00c2Y B\u00c1CH V\u00c0NG (Xanthocyparis vietnamensis<\/em> Farjon & N.T.Hiep) PH\u1ee4C V\u1ee4 C\u00d4NG T\u00c1C B\u1ea2O T\u1ed2N<\/p>\n

<\/a>B\u00f9i Tr\u1ecdng Th\u1ee7y1<\/sup>, \u0110\u1eb7ng Th\u1ecb Tuy\u1ebft1<\/sup>, Nguy\u1ec5n C\u00f4ng Ph\u01b0\u01a1ng1<\/sup>,
\nTr\u01b0\u01a1ng Ng\u1ecdc Long2<\/sup>, V\u0169 Qu\u00fd \u0110\u00f4ng3<\/sup><\/p>\n

1Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u00f4ng B\u1eafc B\u1ed9
\n2Ban Qu\u1ea3n l\u00fd r\u1eebng \u0111\u1eb7c d\u1ee5ng Phia O\u1eafc – Phia \u0110\u00e9n, huy\u1ec7n Nguy\u00ean B\u00ecnh, t\u1ec9nh Cao B\u1eb1ng
\n3Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Hi\u1ec7n nay, ngu\u1ed3n h\u1ea1t gi\u1ed1ng c\u00e2y B\u00e1ch v\u00e0ng (Xanthocyparis vietnamensis<\/em> Farjon & N.T.Hiep) thu th\u1eadp \u0111\u01b0\u1ee3c r\u1ea5t \u00edt, \u0111\u1ed3ng th\u1eddi kh\u1ea3 n\u0103ng gieo \u01b0\u01a1m th\u00e0nh c\u00f4ng h\u1ea1n ch\u1ebf. Do \u0111\u00f3, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh c\u00e2y B\u00e1ch v\u00e0ng \u0111\u1ec3 ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng l\u00e0 b\u01b0\u1edbc ti\u1ebfn l\u1edbn trong c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n \u1edf Vi\u1ec7t Nam. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, hom B\u00e1ch v\u00e0ng c\u00f3 kh\u1ea3 n\u0103ng ra r\u1ec5 kh\u00e1 t\u1ed1t. Ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng IBA (Indole – 3 – Butiric Acid) v\u00e0 NAA \u1edf n\u1ed3ng \u0111\u1ed9 1.500 ppm l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t cho gi\u00e2m hom B\u00e1ch v\u00e0ng (t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t t\u1eeb 82,41 – 94,44%), b\u1ed9 r\u1ec5 kh\u1ecfe. Lo\u1ea1i hom c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn kh\u1ea3 n\u0103ng ra r\u1ec5 c\u0169ng nh\u01b0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 r\u1ec5 c\u1ee7a c\u00e2y hom. Hom l\u00e1 h\u00ecnh m\u0169i m\u00e1c tr\u00ean c\u00e2y m\u1eb9 ch\u01b0a tr\u01b0\u1edfng th\u00e0nh cho t\u1ef7 l\u1ec7 ra r\u1ec5 cao nh\u1ea5t 94,44%; hom l\u00e1 h\u00ecnh d\u1ea3i non kh\u00f4ng ph\u00f9 h\u1ee3p \u0111\u1ec3 l\u1ea5y c\u00e0nh hom; hom l\u00e1 h\u00ecnh v\u1ea3y l\u00e0 hom l\u00e1 gi\u00e0 n\u00ean ra r\u1ec5 r\u1ea5t ch\u1eadm, t\u1ef7 l\u1ec7 ra r\u1ec5 th\u1ea5p (cao nh\u1ea5t l\u00e0 34,26%). M\u1eb7t kh\u00e1c, m\u00f9a v\u1ee5 c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn kh\u1ea3 n\u0103ng ra r\u1ec5 c\u1ee7a B\u00e1ch v\u00e0ng, v\u1ee5 Xu\u00e2n v\u00e0 v\u1ee5 H\u00e8 cho t\u1ef7 l\u1ec7 ra r\u1ec5 th\u1ea5p h\u01a1n v\u1ee5 Thu v\u00e0 v\u1ee5 \u0110\u00f4ng.<\/td>\n<\/tr>\n

<\/a>Research on clonal propagation of Golden Cypress (Xanthocyparis vietnamensis <\/em>Farjon & N.T.Hiep) for conservation<\/strong><\/p>\n

Currently, the seed source of Golden Cypress (Xanthocyparis vietnamensis<\/em> Farjon & N.T.Hiep) collected is very limited, and the possibility of successful seedling production is very low. Therefore, the research on clonal propagation of Golden Cypress for afforestation is a great step forwards in conservation of this species in Vietnam. Research results show that the Golden Cypress cuttings had good rooting ability. The growth regulator IBA and NAA at a concentration of 1.500 ppm is the most suitable for Golden Cypress (rooting rate from 82.41 – 94.44%), strong roots. The type of cuttings has a great influence on the rooting ability as well as the quality of the roots of the cuttings. The lance-shaped leaf cuttings on the immature mother tree gave the highest rooting rate of 94.44%, the strip-shaped leaf cuttings were too young to be suitable for cuttings, the scale-shaped leaf cuttings were old leaf cuttings, so the cuttings took root very slowly, the rooting rate was not high, reaching 34.26% at the highest. On the other hand, the season has a great influence on the rooting ability of Golden Cypress, as the spring and summer give a much lower rooting rate than the autumn and winter.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TH\u1ef0C TR\u1ea0NG TR\u1ed2NG V\u00c0 KHAI TH\u00c1C RE G\u1eeaNG\u00a0T\u1ea0I M\u1ed8T S\u1ed0 T\u1ec8NH PH\u00cdA B\u1eaeC<\/p>\n

<\/a>L\u1ea1i Thanh H\u1ea3i, Nguy\u1ec5n H\u1eefu Th\u1ecbnh, Ph\u1ea1m \u0110\u00ecnh S\u00e2m,
\nH\u1ed3 Trung L\u01b0\u01a1ng, Ho\u00e0ng V\u0103n Th\u00e0nh, Nguy\u1ec5n Thanh S\u01a1n,
\nH\u00e0 Th\u1ecb Mai, Tr\u1ea7n H\u1ed3ng V\u00e2n, V\u0169 Ti\u1ebfn L\u00e2m, Nguy\u1ec5n Th\u00f9y D\u01b0\u01a1ng<\/p>\n

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

Trong th\u1ef1c ti\u1ec5n s\u1ea3n xu\u1ea5t hi\u1ec7n nay \u0111ang c\u00f3 3 lo\u1ea1i m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng Re g\u1eebng l\u00e0: m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng thu\u1ea7n lo\u00e0i Re g\u1eebng, m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng h\u1ed7n giao Re g\u1eebng v\u1edbi c\u00e1c lo\u00e0i c\u00e2y l\u00e2m nghi\u1ec7p kh\u00e1c v\u00e0 m\u00f4 h\u00ecnh l\u00e0m gi\u00e0u r\u1eebng b\u1eb1ng c\u00e2y Re g\u1eebng. C\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Re g\u1eebng \u0111\u01b0\u1ee3c tr\u1ed3ng theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau nh\u01b0ng v\u1ec1 c\u01a1 b\u1ea3n c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt nh\u01b0 ngu\u1ed3n g\u1ed1c c\u00e2y gi\u1ed1ng, l\u00e0m \u0111\u1ea5t, b\u00f3n ph\u00e2n v\u00e0 ch\u0103m s\u00f3c r\u1eebng l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i gi\u1ed1ng nhau. T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a Re g\u1eebng trong c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng h\u1ed7n giao th\u01b0\u1eddng cao h\u01a1n so v\u1edbi khi tr\u1ed3ng thu\u1ea7n lo\u00e0i v\u00e0 tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng. Re g\u1eebng c\u00f3 sinh tr\u01b0\u1edfng \u1edf m\u1ee9c trung b\u00ecnh, t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n ch\u1ec9 \u0111\u1ea1t t\u1eeb 0,54 cm\/n\u0103m \u0111\u1ebfn 1,6 cm\/n\u0103m. T\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao b\u00ecnh qu\u00e2n dao \u0111\u1ed9ng t\u1eeb 0,52 m\/n\u0103m \u0111\u1ebfn 1,23 m\/n\u0103m. Trong c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng h\u1ed7n lo\u00e0i Re g\u1eebng v\u1edbi c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba, Re g\u1eebng \u0111\u1ec1u cho sinh tr\u01b0\u1edfng nhanh h\u01a1n c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba kh\u00e1c l\u00e0 Sao \u0111en, Tr\u1ea7m h\u01b0\u01a1ng, Ch\u00f2 ch\u1ec9, Lim x\u1eb9t, M\u1ee1 v\u00e0 S\u1ed3i ph\u1ea3ng. N\u0103ng su\u1ea5t c\u1ee7a Re g\u1eebng \u0111\u1ea1t cao nh\u1ea5t \u1edf m\u00f4 h\u00ecnh h\u1ed7n giao t\u1ea1i Ph\u00fa Th\u1ecd v\u1edbi l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n \u0111\u1ea1t 9,14 m3<\/sup>\/ha\/n\u0103m. Khai th\u00e1c g\u1ed7 Re g\u1eebng di\u1ec5n ra r\u1ea5t \u00edt v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng l\u00e1 Re g\u1eebng \u0111\u1ec3 ch\u01b0ng c\u1ea5t tinh d\u1ea7u h\u1ea7u nh\u01b0 ch\u01b0a \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong th\u1ef1c ti\u1ec5n, m\u00e0 m\u1edbi ch\u1ec9 d\u1eebng l\u1ea1i \u1edf h\u00ecnh th\u1ee9c th\u1eed nghi\u1ec7m.<\/td>\n<\/tr>\n

<\/a>Afforestation and exploitation status of Cinnamomum bejolghota <\/em>(Buch-Ham) in some northern provinces<\/strong><\/p>\n

Currently, there are 3 types of Cinnamomum bejolghota<\/em> (Buch-Ham) afforestation models, including: monoculture afforestation, mixed-species afforestation with other forestry tree species, and forest enrichment by
\nC. bejolghota<\/em>. Its afforestation models are planted in different methods. However, the basic technical measures such as seedling origin, tillage, fertilization and tending are similar. The survival rate of mixed-species models was higher than that of monoculture and enrichment planting.
\nC. bejolghota<\/em> had a median growth rate, with average diameter growth of only from 0.54 to 1.6 cm\/year. The average height growth ranged from 0.52 to 1.23 m\/year. In the mixed-species afforestation with other forestry tree species models, C. bejolghota<\/em> grew faster than other native species such as Hopea odorata<\/em>, Aquilaria crassna<\/em>, Parashorea chinensis<\/em>, Peltophorum pterocarpum<\/em>, Manglietia conifera<\/em>, Lithocapus fisus<\/em>. The highest yield of
\nC. bejolghota<\/em> was found in the mixed-species model in Phu Tho with an average yield growth of 9.14 m3<\/sup>\/ha\/year. Exploitation of C. bejolghota<\/em> was highly limited and the use of C. bejolghota<\/em> leaves for producing essential oils has only reached experimental stage and has almost never been applied at wider scale.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a><\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A PH\u00c2N B\u00d3N V\u00c0 N\u01af\u1edaC T\u01af\u1edaI \u0110\u1ebeN SINH TR\u01af\u1edeNG\u00a0V\u00c0 N\u0102NG SU\u1ea4T M\u1ee6 C\u1ee6A R\u1eeaNG TR\u1ed2NG TR\u00d4M (Sterculia foetida<\/em> L.)\u00a0T\u1ea0I V\u00d9NG KH\u00d4 H\u1ea0N NAM TRUNG B\u1ed8<\/p>\n

<\/a>Ph\u00f9ng V\u0103n Khang, Ph\u00f9ng V\u0103n Khen, Nguy\u1ec5n Tr\u1ecdng Nam,
\nNguy\u1ec5n Qu\u1ed1c \u0110\u1ea1t, L\u00ea Tri\u1ec7u Duy, Tr\u1ea7n V\u0103n Nho<\/p>\n

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

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n v\u00e0 ch\u1ebf \u0111\u1ed9 t\u01b0\u1edbi n\u01b0\u1edbc t\u1edbi sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t m\u1ee7 c\u1ee7a r\u1eebng tr\u1ed3ng Tr\u00f4m 4 n\u0103m tu\u1ed5i t\u1ea1i v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung B\u1ed9 cho th\u1ea5y, m\u1eb7c d\u00f9 Tr\u00f4m (Sterculia foetida<\/em> L.) l\u00e0 lo\u00e0i c\u00e2y c\u00f3 bi\u00ean \u0111\u1ed9 sinh th\u00e1i r\u1ed9ng, th\u00edch nghi t\u1ed1t v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t nh\u01b0 l\u01b0\u1ee3ng m\u01b0a th\u1ea5p, nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ea5t ngh\u00e8o ch\u1ea5t dinh d\u01b0\u1ee1ng… Tuy nhi\u00ean, khi tr\u1ed3ng r\u1eebng Tr\u00f4m th\u00e2m canh l\u1ea5y m\u1ee7 c\u1ea7n thi\u1ebft ph\u1ea3i b\u00f3n ph\u00e2n v\u00e0 t\u01b0\u1edbi n\u01b0\u1edbc \u0111\u1ec3 r\u00fat ng\u1eafn th\u1eddi k\u1ef3 ki\u1ebfn thi\u1ebft v\u00e0 t\u0103ng s\u1ea3n l\u01b0\u1ee3ng m\u1ee7. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, khi b\u00f3n l\u00f3t m\u1ed7i h\u1ed1 2,0 kg ph\u00e2n chu\u1ed3ng + 0,2 kg ph\u00e2n NPK ho\u1eb7c 0,5 kg ph\u00e2n vi sinh sau \u0111\u00f3 t\u1ee7 r\u01a1m s\u1ebd gi\u00fap c\u00e2y sinh tr\u01b0\u1edfng nhanh h\u01a1n, s\u1ed1 l\u01b0\u1ee3ng c\u00e2y \u0111\u1ea1t k\u00edch th\u01b0\u1edbc khai th\u00e1c m\u1ee7 trung b\u00ecnh l\u00e0 24,0 c\u00e2y, t\u1ed5ng l\u01b0\u1ee3ng m\u1ee7 thu \u0111\u01b0\u1ee3c l\u00e0 1.532,6 g, nhi\u1ec1u g\u1ea5p 2,5 l\u1ea7n so v\u1edbi \u0111\u1ed1i ch\u1ee9ng kh\u00f4ng b\u00f3n. Trong n\u0103m \u0111\u1ea7u ti\u00ean, c\u1ea7n t\u01b0\u1edbi n\u01b0\u1edbc v\u1edbi li\u1ec1u l\u01b0\u1ee3ng 40 l\u00edt n\u01b0\u1edbc\/c\u00e2y, t\u01b0\u1edbi 2 tu\u1ea7n\/l\u1ea7n, trong kho\u1ea3ng 7 th\u00e1ng m\u00f9a kh\u00f4 s\u1ebd gi\u00fap n\u00e2ng cao t\u1ef7 l\u1ec7 s\u1ed1ng l\u00ean 96,8% so v\u1edbi 63,5% khi kh\u00f4ng t\u01b0\u1edbi n\u01b0\u1edbc; s\u1ed1 l\u01b0\u1ee3ng c\u00e2y \u0111\u1ea1t k\u00edch th\u01b0\u1edbc l\u1ea5y m\u1ee7 trung b\u00ecnh l\u00e0 17,3 c\u00e2y v\u00e0 t\u1ed5ng l\u01b0\u1ee3ng m\u1ee7 thu \u0111\u01b0\u1ee3c l\u00e0 1.506,8 g, nhi\u1ec1u h\u01a1n 4 v\u00e0 6 l\u1ea7n so v\u1edbi \u0111\u1ed1i ch\u1ee9ng kh\u00f4ng t\u01b0\u1edbi.<\/td>\n<\/tr>\n

<\/a>Effects of fertilizers and irrigation water on the growth and yield\u00a0of gum plantations (Sterculia foetida<\/em> L.) in the South Central arid region<\/strong><\/p>\n

Research results on the research of fertilizers and irrigation water on growth and gum yield of 4-year-old Sterculia foetida<\/em> L. plantations in the arid South Central region show that although Sterculia foetida<\/em> L. is a plant with a wide ecological range, well adapted to harsh conditions such as low rainfall, high temperature, nutrient-poor soil… However, when planting Sterculia foetida<\/em> L. forest intensively for gum, it is necessary to fertilize and water to shorten the construction period and increase gum production. The results showed that when priming each hole with 2.0 kg of manure + 0.2 kg of NPK fertilizer or 0.5 kg of microbial fertilizer, then was covered by straw that helped plants growed more quickly, the number of trees reaching the size of to harvest gum were 24 trees, the total amount of gum collected were 1.532,7 g, 2,5 times more than the control without appilication. In the first year, it is necessary to water with a dose of 40 liters\/per plant, every 2 weeks during, 7 months in the dry season, the survival rates reached to 96.8% as compared to 63.5% survival rate in the without irrigation treatment; the number of trees reaching size to collect gum were 17,3 trees and total gum harvested were 1.506,8 g; 4 times and 6 times as compared to the without irrigation treatment.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC C\u1ee6A LO\u00c0I NGHI\u1ebeN G\u00c2N BA\u00a0T\u1ea0I T\u1ec8NH TH\u00c1I NGUY\u00caN<\/p>\n

<\/a>D\u01b0\u01a1ng V\u0103n Th\u1ea3o, V\u0169 V\u0103n Th\u00f4ng<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u1ebfn g\u00e2n ba (Excentrodendron tonkinensis<\/em>) \u0111\u00e3 t\u1eebng b\u1ecb khai th\u00e1c t\u1eadn di\u1ec7t n\u00ean ch\u1ec9 c\u00f2n m\u1ed9t s\u1ed1 c\u00e1 th\u1ec3 trong v\u01b0\u1eddn h\u1ed9 gia \u0111\u00ecnh v\u00e0 r\u1ea3i r\u00e1c trong r\u1eebng t\u1ef1 nhi\u00ean. Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m ph\u00e2n b\u1ed1 v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e2y Nghi\u1ebfn g\u00e2n ba t\u1ea1i Th\u00e1i Nguy\u00ean l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c b\u1ea3o t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n ngu\u1ed3n gen. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, c\u00e2y Nghi\u1ebfn g\u00e2n ba c\u00f2n r\u1ea5t \u00edt \u1edf Th\u00e1i Nguy\u00ean, t\u1eadp trung \u1edf huy\u1ec7n V\u00f5 Nhai. T\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y g\u1ed7 n\u01a1i c\u00f3 lo\u00e0i Nghi\u1ebfn g\u00e2n ba ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean g\u1ed3m c\u00f3 c\u00e1c lo\u00e0i c\u00e2y nh\u01b0 Chay b\u1eafc b\u1ed9, D\u01b0\u1edbng, M\u00f3c b\u1eafc s\u01a1n, M\u1ea1y t\u00e8o, D\u1ebb gai, Kh\u00e1o l\u00e1 to, M\u1ea1y pu\u00f4n, \u0110\u1eb9n 3 l\u00e1, Th\u00edch n\u0103m th\u00f9y, Han voi, S\u1ed3i gai, Th\u00f4i ba l\u00f4ng. T\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y t\u00e1i sinh trong khu v\u1ef1c c\u00f3 c\u00e2y Nghi\u1ebfn g\u00e2n ba ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean c\u00f3 c\u00e1c lo\u00e0i nh\u01b0: D\u01b0\u1edbng, Th\u00edch n\u0103m th\u00f9y, D\u1ebb gai, T\u00e1u mu\u1ed1i, L\u00f2ng mang c\u1ee5t, Kh\u00e1o l\u00e1 nh\u1ecf, Nh\u00e3n r\u1eebng, M\u1ea1y pu\u00f4n, S\u1ed3i gai, Mu\u1ed3ng, H\u01b0\u01a1ng vi\u00ean n\u00fai, D\u00e2u da xoan. \u0110\u1ed9 t\u00e0n che trung b\u00ecnh trong c\u00e1c \u00f4 ti\u00eau chu\u1ea9n c\u00f3 Nghi\u1ebfn g\u00e2n ba ph\u00e2n b\u1ed1 kho\u1ea3ng 0,56. C\u00e2y t\u00e1i sinh \u0111\u1ec1u c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb h\u1ea1t v\u1edbi m\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh tri\u1ec3n v\u1ecdng trung b\u00ecnh \u0111\u1ea1t 420 c\u00e2y\/ha.<\/td>\n<\/tr>\n

<\/a>Silvicultural chracteristics of Excentrodendron tonkinensis<\/em> in\u00a0Thai Nguyen province, Vietnam<\/strong><\/p>\n

Excentrodendron tonkinensis<\/em> has been excessivelly exploited, so there are only a few individuals left in the household garden and scattered in the natural forest. This study aims to determine the distributional and silvicultural characteristics of the species in Thai Nguyen province as a basis for the conservation and unilization of genetic resources. Research results show that there are very few trees left in Thai Nguyen province, mainly concentrated in Vo Nhai district. The tree species composition where there is a natural distribution of Excentrodendron tonkinensis<\/em>, includes: Artocarpus tonkinensis<\/em>, Broussonetia papyrifera, Caryota bacsonensis, Streblus macrophyllus, Fagus sylvatica, Castanopsis indica, Machilus bonii, Clerodendron cyrtophyllum, Vitex trifolia, Acer carpinifolium, Laportea violacea, Alangium chinense<\/em>. The regenerative species composition in the area where the tree is naturally distributed are as follows: Broussonetia papyrifera, Acer carpinifolium, Castanopsis indica, Vatica odorata, Pterospermum diversifolium<\/em>, Machilus bonii, Nephelium cuspidatum, Clerodendron cyrtophyllum, Fagus sylvatica, Senna siamea, Osmanthus fragrans, Spondias lakonensis.<\/em>The average tree canopy cover in the sampling plots with nutural distribution of Excentrodendron tonkinensis<\/em> is about 0.56. The regenerated seedlings were all derived from seeds with an average density of 420 seedlings\/ha.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M V\u00c0 PH\u00c2N CHIA L\u1eacP \u0110\u1ecaA C\u00c1T VEN BI\u1ec2N\u00a0L\u00c0M C\u01a0 S\u1ede TR\u1ed2NG R\u1eeaNG PH\u00d2NG H\u1ed8 T\u1ea0I T\u1ec8NH TR\u00c0 VINH<\/p>\n

<\/a>Ho\u00e0ng V\u0103n Th\u01a1i, \u0110inh Thi\u0323 Ph\u01b0\u01a1ng Vy, L\u00ea Thanh Quang,
\nNguy\u1ec5n Kh\u1eafc \u0110i\u1ec7u, \u0110inh Duy Tu\u00e2\u0301n<\/p>\n

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

Nghi\u00ean c\u1ee9u \u0111\u0103\u0323c \u0111i\u00ea\u0309m va\u0300 ph\u00e2n chia l\u00e2\u0323p \u0111i\u0323a vu\u0300ng \u0111\u00e2\u0301t ca\u0301t ven bi\u00ea\u0309n la\u0300m c\u01a1 s\u01a1\u0309 tr\u00f4\u0300ng r\u01b0\u0300ng pho\u0300ng h\u00f4\u0323, \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i khu v\u01b0\u0323c ven bi\u00ea\u0309n ti\u0309nh Tra\u0300 Vinh, nh\u1eb1m xa\u0301c \u0111i\u0323nh \u0111\u01b0\u01a1\u0323c ca\u0301c d\u1ea1ng l\u00e2\u0323p \u0111i\u0323a chi\u0301nh t\u01b0\u0300 \u0111o\u0301 la\u0300m c\u01a1 s\u01a1\u0309 b\u00f4\u0301 tri\u0301 loa\u0300i c\u00e2y tr\u00f4\u0300ng phu\u0300 h\u01a1\u0323p tr\u00ean vu\u0300ng \u0111\u00e2\u0301t ca\u0301t ven bi\u00ea\u0309n. Kha\u0309o sa\u0301t \u0111\u0103\u0323c \u0111i\u00ea\u0309m \u0111i\u0323a hi\u0300nh, \u0111\u00e2\u0301t \u0111ai, th\u01b0\u0323c v\u00e2\u0323t che phu\u0309 b\u0103\u0300ng ph\u01b0\u01a1ng pha\u0301p \u0111i\u00ea\u0300u tra theo tuy\u00ea\u0301n, m\u00f4\u0303i xa\u0303 b\u00f4\u0301 tri\u0301 3 tuy\u00ea\u0301n theo h\u01b0\u01a1\u0301ng vu\u00f4ng go\u0301c v\u01a1\u0301i \u0111\u01b0\u01a1\u0300ng b\u01a1\u0300 bi\u00ea\u0309n, chi\u00ea\u0300u da\u0300i tuy\u00ea\u0301n bi\u00ea\u0301n \u0111\u00f4\u0323ng t\u01b0\u0300 200 – 1.000 m. Ph\u00e2n chia l\u00e2\u0323p \u0111i\u0323a d\u01b0\u0323a tr\u00ean ca\u0301c y\u00ea\u0301u t\u00f4\u0301 \u0111i\u0323a hi\u0300nh, lo\u1ea1i \u0111\u00e2\u0301t, th\u01b0\u0323c v\u00e2\u0323t che phu\u0309 va\u0300 ch\u00ea\u0301 \u0111\u00f4\u0323 \u00e2\u0309m. K\u1ebft qu\u1ea3 \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c (i) co\u0301 4 loa\u0323i \u0111i\u0323a hi\u0300nh \u0111i\u0323a ma\u0323o ven bi\u00ea\u0309n, bao g\u00f4\u0300m b\u00e3i c\u00e1t, thoa\u0301t n\u01b0\u01a1\u0301c; b\u00e3i c\u00e1t g\u00f2 l\u01b0\u00ad\u1ee3n s\u00f3ng xen k\u1ebd l\u00e0 c\u00e1c d\u1ea3i \u0111\u1ea5t th\u1ea5p ng\u1eadp tri\u1ec1u; d\u1ea1ng c\u00f4\u0300n \u0111\u00ea ch\u0103\u0301n cao trung b\u00ecnh, h\u1eb9p nh\u01b0\u00adng k\u00e9o d\u00e0i, d\u1ed1c m\u1ea1nh c\u1ea3 hai ph\u00eda va\u0300; b\u00e3i c\u00e1t th\u1ea5p, b\u00e1n ng\u1eadp, t\u00ad\u01b0\u01a1ng \u0111\u1ed1i r\u1ed9ng v\u00e0 b\u1eb1ng ph\u1eb3ng, ng\u1eadp n\u00ad\u01b0\u1edbc v\u00e0o m\u00f9a m\u01b0a; (ii) co\u0301 3 lo\u1ea1i \u0111\u1ea5t ch\u00ednh, \u0111o\u0301 la\u0300 c\u00e1t m\u1eb7n, \u00edt chua; c\u00e1t m\u1eb7n, trung t\u00ednh va\u0300 c\u00e1t m\u1eb7n, ki\u1ec1m; (iii) tha\u0300nh ph\u00e2\u0300n th\u01b0\u0323c v\u00e2\u0323t g\u00f4\u0300m nh\u00f3m c\u00e2y b\u1ee5i, c\u00e2y th\u00e2n th\u1ea3o bao g\u1ed3m 15 lo\u00e0i thu\u1ed9c 8 h\u1ecd th\u1ef1c v\u1eadt, \u0111\u1ed9 che ph\u1ee7 70 – 100%; (iv) vu\u0300ng ca\u0301t ven bi\u00ea\u0309n \u0111\u01b0\u01a1\u0323c ph\u00e2n chia tha\u0300nh 4 nho\u0301m l\u1eadp \u0111\u1ecba A, B, C v\u00e0 D v\u1edbi 12 d\u1ea1ng l\u1eadp \u0111\u1ecba ch\u00ednh. Nh\u00f3m A g\u00f4\u0300m da\u0323ng \u0111\u00e2\u0301t ca\u0301t, m\u0103\u0323n, i\u0301t chua (I1c); da\u0323ng \u0111\u00e2\u0301t ca\u0301t, m\u0103\u0323n, trung ti\u0301nh (I2c); da\u0323ng \u0111\u00e2\u0301t ca\u0301t, m\u0103\u0323n, ki\u00ea\u0300m (I3c) nh\u00f3m n\u00e0y thu\u1eadn l\u1ee3i trong canh t\u00e1c c\u00e2y hoa m\u00e0u v\u00e0 tr\u1ed3ng r\u1eebng. Nh\u00f3m C g\u00f4\u0300m \u0111\u1ee5n ho\u1eb7c \u0111\u00ea c\u00e1t, m\u0103\u0323n, i\u0301t chua (III1b); ca\u0301t, m\u0103\u0323n, trung ti\u0301nh (III2b) va\u0300 da\u0323ng ca\u0301t, m\u0103\u0323n, ki\u00ea\u0300m (III3a) la\u0300 da\u0323ng ca\u0301t c\u1ed1 \u0111\u1ecbnh g\u1ea7n nh\u00ad\u01b0 kh\u00f4ng bao gi\u1edd ng\u1eadp n\u01b0\u00ad\u1edbc, l\u1ea1i c\u00f3 m\u1ef1c n\u00ad\u01b0\u1edbc ng\u1ea7m s\u00e2u n\u00ean r\u1ea5t kh\u00f3 kh\u0103n cho s\u1ea3n xu\u1ea5t. Nh\u00f3m l\u1eadp \u0111\u1ecba B g\u00f4\u0300m ca\u0301c da\u0323ng \u0111\u00e2\u0301t ca\u0301t, m\u0103\u0323n, trung ti\u0301nh (II2c, II2e) \u0111\u00ea\u0301n \u0111\u00e2\u0301t ca\u0301t, m\u0103\u0323n, ki\u00ea\u0300m (II3c va\u0300 II3e) nho\u0301m na\u0300y th\u01b0\u01a1\u0300ng ng\u1eadp n\u01b0\u1edbc m\u1eb7n do th\u1ee7y tri\u1ec1u n\u00ean cu\u0303ng g\u0103\u0323p kho\u0301 kh\u0103n khi tr\u00f4\u0300ng r\u01b0\u0300ng. Nho\u0301m D g\u00f4\u0300m ca\u0301c da\u0323ng \u0111\u00e2\u0301t ca\u0301t, m\u0103\u0323n, i\u0301t chua (IV1d) va\u0300 \u0111\u00e2\u0301t ca\u0301t, m\u0103\u0323n, trung ti\u0301nh (IV2d) da\u0323ng na\u0300y b\u1ecb ng\u1eadp \u00fang theo m\u00f9a n\u00ean c\u0169ng g\u00e2y kho\u0301 cho cho\u0323n loa\u0300i c\u00e2y tr\u00f4\u0300ng r\u01b0\u0300ng.<\/td>\n<\/tr>\n

<\/a>Studying the characteristics and site division of coastal sandy soils as a basis for planting protection forests in Tra Vinh province<\/strong><\/p>\n

Study on characteristics and site division of coastal sandy soil as a basis for planting protection forests, carried out in the coastal area of Tra Vinh province, in order to identify types of site, as a basis for arranging suitable plant species on sandy coastal areas. Surveying topographical characteristics, land and vegetation cover by line survey method, each commune arranges 3 routes in the direction perpendicular to the coastline, the length of the route varies from 200 – 1,000 m. Site division is based on topographical factors, soil, vegetation cover and moisture regime. As a result, it was determined that (i) there are 4 types of topography and geomorphology of coastal sandy, including: well-drained sandy beaches; undulating sandbanks interspersed with tidally flooded lowlands; form of barrier dune of medium height, narrow but long, steeply sloping on both sides and low sandy beach, semi-flooded, relatively wide and flat, flooded in rainy season; (ii) there are 3 main types of soil, which are salty, less acidic sand; salty, neutral sand and salty, alkaline sand; (iii) plant composition including shrubs, herbaceous plants including 15 species of 8 plant families, coverage 70 – 100%; (iv) coastal sandy soil is divided into 4 site groups A, B, C and D with 12 types of sites. Group A includes sandy, saline, slightly acidic soil (I1c); sandy, saline, neutral soil form (I2c); sandy, saline, alkaline soil (I3c) this group is favorable in crop cultivation and afforestation. Group C includes sand dunes or dikes, saline, less acidic (III1b); sand, saline, neutral (III2b) and sandy, saline, alkaline soil (IV3a) is a fixed type of sand that almost never gets flooded, and has a deep groundwater level, so it is very difficult for plantation. Site group B includes sandy, saline, neutral soil (II2c, II2e), sandy, saline, alkaline soil (II3c, II3e) that are flooded with salt water due to tides, so they are also not favorable for plantation. Group D includes sandy, saline, slightly acidic soil (IV1d); sandy, saline, neutral soil form (IV2d) that are seasonally flooded, so they are also not favorable for plantation.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>\u0110\u1eb6C \u0110I\u1ec2M SINH S\u1ea2N C\u1ee6A LO\u00c0I S\u00c2U \u0102N L\u00c1 (Antheraea frithi <\/em>Moore) G\u00c2Y H\u1ea0I C\u00c2Y D\u1ea6U R\u00c1I V\u00c0 SAO \u0110EN T\u1ea0I TH\u00c0NH PH\u1ed0 H\u1ed2 CH\u00cd MINH<\/strong><\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb H\u1ea3i H\u1ed3ng1<\/sup>, Nguy\u1ec5n V\u0103n Th\u00e0nh2<\/sup>, Tr\u01b0\u01a1ng C\u00f4ng L\u1ef1c3<\/sup>,
\nL\u00ea Th\u1ecb Nghi\u00eam3<\/sup>, B\u00f9i Th\u1ecb Gia H\u00e2n1<\/sup>, Tr\u1ea7n Th\u1ecb M\u1ef9 Duy\u00ean1<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9
\n2<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng
\n3<\/sup>Chi c\u1ee5c Tr\u1ed3ng tr\u1ecdt v\u00e0 B\u1ea3o v\u1ec7 Th\u1ef1c v\u1eadt TP. H\u1ed3 Ch\u00ed Minh<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u00e2u \u0103n l\u00e1 (Antheraea frithi <\/em>Moore) \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 c\u00f4n tr\u00f9ng g\u00e2y h\u1ea1i nghi\u00eam tr\u1ecdng \u0111\u1ed1i v\u1edbi hai lo\u00e0i c\u00e2y Sao \u0111en v\u00e0 D\u1ea7u r\u00e1i tr\u00ean r\u1eebng tr\u1ed3ng, c\u00e2y \u0111\u01b0\u1eddng ph\u1ed1 t\u1ea1i TP. H\u1ed3 Ch\u00ed Minh v\u00e0 v\u00f9ng l\u00e2n c\u1eadn trong nh\u1eefng n\u0103m qua. \u0110\u00e2y l\u00e0 lo\u00e0i c\u00f4n tr\u00f9ng c\u00f3 ki\u1ec3u bi\u1ebfn th\u00e1i ho\u00e0n to\u00e0n bao g\u1ed3m c\u00e1c pha tr\u1ee9ng, s\u00e2u non, nh\u1ed9ng v\u00e0 tr\u01b0\u1edfng th\u00e0nh. Trong \u0111i\u1ec1u ki\u1ec7n th\u00ed nghi\u1ec7m \u1edf nhi\u1ec7t \u0111\u1ed9 25o<\/sup>C, \u0111\u1ed9 \u1ea9m 56%, th\u1ee9c \u0103n l\u00e0 l\u00e1 t\u01b0\u01a1i D\u1ea7u r\u00e1i v\u00e0 Sao \u0111en cho th\u1ea5y, c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t \u00fd ngh\u0129a v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng gi\u1eefa k\u00e9n \u0111\u1ef1c v\u00e0 k\u00e9n c\u00e1i, tr\u01b0\u1edfng th\u00e0nh \u0111\u1ef1c v\u00e0 tr\u01b0\u1edfng th\u00e0nh c\u00e1i. Tr\u1ecdng l\u01b0\u1ee3ng trung b\u00ecnh c\u1ee7a k\u00e9n \u0111\u1ef1c l\u00e0 4,13 g, k\u00e9n c\u00e1i l\u00e0 6,28 g; Tr\u01b0\u1edfng th\u00e0nh c\u00e1i c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 3,79 g, l\u1edbn h\u01a1n tr\u01b0\u1edfng th\u00e0nh \u0111\u1ef1c c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng 1,61 g. Th\u1eddi gian s\u1ed1ng c\u1ee7a tr\u01b0\u1edfng th\u00e0nh 6 – 8 ng\u00e0y. Sau khi v\u0169 h\u00f3a 1 – 3 ng\u00e0y, tr\u01b0\u1edfng th\u00e0nh b\u1eaft c\u1eb7p v\u00e0 \u0111\u1ebb tr\u1ee9ng. S\u1ed1 l\u01b0\u1ee3ng tr\u1ee9ng \u0111\u1ebb trung b\u00ecnh l\u00e0 220 tr\u1ee9ng\/c\u00e1i v\u00e0 t\u1ef7 l\u1ec7 n\u1edf s\u00e2u trung b\u00ecnh \u0111\u1ea1t 46,21%. Th\u1eddi gian tr\u1ee9ng n\u1edf dao \u0111\u1ed9ng 4 – 9 ng\u00e0y. H\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan gi\u1eefa tr\u1ecdng l\u01b0\u1ee3ng k\u00e9n c\u00e1i v\u00e0 s\u1ed1 l\u01b0\u1ee3ng tr\u1ee9ng l\u00e0 0,59, cao h\u01a1n so v\u1edbi h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan gi\u1eefa tr\u1ecdng l\u01b0\u1ee3ng tr\u01b0\u1edfng th\u00e0nh c\u00e1i v\u00e0 s\u1ed1 l\u01b0\u1ee3ng tr\u1ee9ng (0,48).<\/td>\n<\/tr>\n

<\/a>Fertility characteristics of Antheraea frithi <\/em>Moore damaging Dipterocarpus<\/em> alatus <\/em>and Hopea odorata <\/em>in Ho Chi Minh City<\/strong><\/p>\n

Antheraea frithi <\/em>Moore, tasar moth, have been identified as serious pests of Dipterocarpus alatus<\/em> and Hopea odorata<\/em> plantations and street trees of in Ho Chi Minh City and neighboring provinces in recent years. This is an insect with a complete metamorphosis consisting of egg, larva, pupa and adult phases. In laboratory conditions at 25o<\/sup>C, 56% humidity, the diet was D. alatus<\/em> and H. odorata<\/em> fresh leaves, there were significant differences in weight between male and female cocoons, male and female moths. The average weight of male and female cocoons were 4.13 g and 6.28 g; male and female moth weighs 3.79 g and 1.61 g. The life time of moths is 6 – 8 days. After breaking out of the cocoon 1 – 3 days, butterflies would pair up and lay eggs. The fecundity is 220 eggs and the hatching is 46.21%. The egg hatch varies 4 – 9 days. The correlation coefficient between weight of female cocoon and number of eggs is 0.59, higher than the correlation coefficient between weight of female moth and number of eggs (0.48).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>Pham Duy Long1*<\/sup>, Nguyen Dinh Chung2,3<\/sup>, Bui Van Bac3<\/sup>,
\nVu Van Loi1<\/sup>, Pham Thi Thu Thuy1<\/sup>, Nguyen Minh Chi1<\/sup><\/p>\n

1 <\/sup>Forest Protection Research Centre
\n2<\/sup> Sub-Department of Forest Ranger I
\n3 <\/sup>Vietnam National University of Forestry<\/p>\n\n\n\n\n
ABSTRACT<\/p>\n

Achaea serva<\/em> is a serious insect pest of Pouteria obovata<\/em> trees in CoTo island, Quang Ninh province, Vietnam. Its caterpillars feed on the host foliage and sometimes heavy damage results in complete defoliation and tree mortality. Biological control is an effective approach to suppress the population of A. serva<\/em>. The present study provides information on a parasitoid wasp, which was found in A. serva <\/em>larvae and pupae. Based on the morphological characteristics, our study preliminarily concluded that this parasitoid wasp belongs to the genus Glyptapanteles<\/em>. The parasitism was more frequently observed in pupae than larvae, and the parasitism rate was higest in Mom Quan Y, followed by Hong Hai and Nam Dong. This finding would be helpful in the biological control programs of A. serva<\/em> in CoTo island and other coastal provinces of Vietnam.<\/td>\n<\/tr>\n

<\/a>B\u01b0\u1edbc \u0111\u1ea7u ghi nh\u1eadn ong k\u00fd sinh Glyptapanteles<\/em> sp. (Hymenoptera: Braconidae) tr\u00ean s\u00e2u \u0103n l\u00e1 Ch\u00f5i t\u1ea1i C\u00f4 T\u00f4, Qu\u1ea3ng Ninh<\/strong><\/p>\n

S\u00e2u \u0103n l\u00e1 (Achaea serva<\/em>) l\u00e0 sinh v\u1eadt g\u00e2y h\u1ea1i nguy hi\u1ec3m cho c\u00e2y Ch\u00f5i \u1edf \u0111\u1ea3o C\u00f4 T\u00f4, t\u1ec9nh Qu\u1ea3ng Ninh. S\u00e2u non th\u01b0\u1eddng \u0103n tr\u1ee5i t\u00e1n l\u00e1 v\u00e0 \u0111\u00f4i khi l\u00e0m ch\u1ebft c\u00e2y. Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m x\u00e1c \u0111\u1ecbnh lo\u00e0i ong k\u00fd sinh tr\u00ean s\u00e2u non v\u00e0 nh\u1ed9ng c\u1ee7a s\u00e2u \u0103n l\u00e1 Ch\u00f5i. D\u1ef1a tr\u00ean \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i, lo\u00e0i ong k\u00fd sinh n\u00e0y \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh thu\u1ed9c gi\u1ed1ng Glyptapanteles <\/em>(Hymenoptera: Braconidae). Ch\u00fang k\u00fd sinh \u1edf giai \u0111o\u1ea1n nh\u1ed9ng nhi\u1ec1u h\u01a1n so v\u1edbi s\u00e2u non v\u00e0 trong s\u1ed1 ba \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u, t\u1ef7 l\u1ec7 k\u00fd sinh cao nh\u1ea5t l\u1ea7n l\u01b0\u1ee3t l\u00e0 Mom Qu\u00e2n Y, H\u1ed3ng H\u1ea3i v\u00e0 Nam \u0110\u00f4ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd g\u00f3p ph\u1ea7n ph\u00e1t tri\u1ec3n lo\u00e0i ong k\u00fd sinh Glyptapanteles<\/em> sp. trong ph\u00f2ng tr\u1eeb s\u00e2u \u0103n l\u00e1 Ch\u00f5i \u1edf C\u00f4 T\u00f4 v\u00e0 c\u00e1c v\u00f9ng duy\u00ean h\u1ea3i t\u1ea1i Vi\u1ec7t Nam.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 TH\u1ef0C HI\u1ec6N D\u1ef0 \u00c1N\u00a0T\u0102NG C\u01af\u1edcNG N\u0102NG L\u1ef0C GI\u00c1M \u0110\u1ecaNH G\u1ed6 CHO VI\u1ec6T NAM<\/p>\n

<\/a>V\u00f5 \u0110\u1ea1i H\u1ea3i1<\/sup>, Ph\u1ea1m \u0110\u1ee9c Chi\u1ebfn1<\/sup>, Ho\u00e0ng Nguy\u1ec5n Vi\u1ec7t Hoa1<\/sup>, B\u00f9i Duy Ng\u1ecdc2<\/sup>,
\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh2<\/sup>, Nguy\u1ec5n B\u1ea3o Ng\u1ecdc2<\/sup>, Nguy\u1ec5n T\u1eed Kim2<\/sup>, V\u0169 Th\u1ecb H\u1ed3ng Th\u1eafm2<\/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<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Vi\u1ec7t Nam l\u00e0 n\u01b0\u1edbc c\u00f3 ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7 c\u00f3 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng cao. S\u1ea3n ph\u1ea9m g\u1ed7 c\u1ee7a Vi\u1ec7t Nam xu\u1ea5t kh\u1ea9u \u0111\u1ebfn tr\u00ean 160 qu\u1ed1c gia v\u00e0 v\u00f9ng l\u00e3nh th\u1ed5, \u0111\u1ee9ng \u0111\u1ea7u khu v\u1ef1c \u0110\u00f4ng Nam \u00c1, th\u1ee9 2 ch\u00e2u \u00c1 v\u00e0 th\u1ee9 5 tr\u00ean th\u1ebf gi\u1edbi v\u00e0 chi\u1ebfm kho\u1ea3ng 6% th\u1ecb ph\u1ea7n s\u1ea3n ph\u1ea9m g\u1ed7 to\u00e0n c\u1ea7u. M\u1eb7c d\u00f9 \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u1eefng th\u00e0nh t\u1ef1u quan tr\u1ecdng, nh\u01b0ng ng\u00e0nh ch\u1ebf bi\u1ebfn g\u1ed7 \u0111ang \u0111\u1ed1i m\u1eb7t v\u1edbi kh\u00f4ng \u00edt kh\u00f3 kh\u0103n, th\u00e1ch th\u1ee9c v\u1ec1 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c v\u00e0 qu\u1ea3n l\u00fd g\u1ed7 h\u1ee3p ph\u00e1p cho to\u00e0n b\u1ed9 chu\u1ed7i cung, ch\u1ea5t l\u01b0\u1ee3ng nguy\u00ean li\u1ec7u. Hi\u1ec7n nay, ph\u01b0\u01a1ng ph\u00e1p gi\u00e1m \u0111\u1ecbnh g\u1ed7 t\u1ea1i Vi\u1ec7t Nam c\u0103n c\u1ee9 v\u00e0o so s\u00e1nh c\u1ea5u t\u1ea1o g\u1ed7 c\u1ee7a m\u1eabu g\u1ed7 gi\u00e1m \u0111\u1ecbnh v\u00e0 m\u1eabu g\u1ed7 tham chi\u1ebfu, t\u00e0i li\u1ec7u, c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1ec1 c\u00e1c lo\u00e0i g\u1ed7. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u1ea7n nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 th\u1ef1c hi\u1ec7n v\u00e0 \u0111\u00f2i h\u1ecfi c\u00e1n b\u1ed9 chuy\u00ean gia. B\u00ean c\u1ea1nh \u0111\u00f3, m\u1ed9t s\u1ed1 lo\u00e0i g\u1ed7 nh\u1eadp kh\u1ea9u v\u00e0o Vi\u1ec7t Nam nh\u01b0ng ph\u00f2ng th\u00ed nghi\u1ec7m ch\u01b0a trao \u0111\u1ed5i \u0111\u01b0\u1ee3c m\u1eabu g\u1ed7 chu\u1ea9n n\u00ean ch\u1ec9 s\u1eed d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u0169ng ti\u1ec1m \u1ea9n nh\u1eefng r\u1ee7i ro. C\u1ee5c L\u00e2m nghi\u1ec7p Hoa K\u1ef3 \u0111\u00e3 h\u1ed7 tr\u1ee3 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p tri\u1ec3n khai th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n \u201cT\u0103ng c\u01b0\u1eddng n\u0103ng l\u1ef1c gi\u00e1m \u0111\u1ecbnh g\u1ed7 cho Vi\u1ec7t Nam\u201d nh\u1eb1m t\u0103ng c\u01b0\u1eddng ki\u1ec3m so\u00e1t g\u1ed7 b\u1ea5t h\u1ee3p ph\u00e1p \u1edf trong n\u01b0\u1edbc v\u00e0 th\u01b0\u01a1ng m\u1ea1i g\u1ed7 qu\u1ed1c t\u1ebf. Trong khu\u00f4n kh\u1ed5 d\u1ef1 \u00e1n, C\u1ee5c L\u00e2m nghi\u1ec7p Hoa K\u1ef3 \u0111\u00e3 cung c\u1ea5p v\u00e0 l\u1eafp \u0111\u1eb7t h\u1ec7 th\u1ed1ng ph\u00e2n t\u00edch gi\u00e1m \u0111\u1ecbnh ch\u1ee7ng lo\u1ea1i g\u1ed7 AccuTOF t\u1ea1i Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng, \u0111\u00e0o t\u1ea1o c\u00e1n b\u1ed9 k\u1ef9 thu\u1eadt, hi\u1ec7n t\u1ea1i \u0111\u00e3 h\u1ed7 tr\u1ee3 x\u00e2y d\u1ef1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u cho 460 lo\u00e0i c\u00e2y,… C\u00f3 th\u1ec3 n\u00f3i D\u1ef1 \u00e1n \u0111\u00e3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ed1t, \u0111\u00fang ti\u1ebfn \u0111\u1ed9, \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng.<\/td>\n<\/tr>\n

<\/a>Results of the implementation of the Project enhancing capacity of wood identification and screening for Vietnam<\/strong><\/p>\n

Vietnam has a high growth rate of wood processing industry. Vietnam’s wood products are exported to over 140 countries and territories. Vietnam is currently ranked the first in Southeast Asia in terms of wood products and furniture production, second in exports in the Asia Pacific region, and fourth in the world, and accounts for about 6% of the global wood product market share. Despite important achievements, the wood processing industry is facing many difficulties and challenges in terms of traceability and legal wood management for the entire supply chain, quality of raw materials… At the moment, the method of wood ID in Vietnam is based on comparing the wood structure of the inspected wood sample and the reference wood sample, documents and databases of wood species. This method takes a long time to implement and expert staffs. In addition, laboratory lacks of some imported wood sample, so using only the image database has potential risks. The US Forest Service and the Vietnamese Academy of Forest Sciences are implementing the project “Enhancing capacity of Wood Identification and Screening for Vietnam” to control illegal timber in the country and international timber trade. Within the framework of the project, the USFS has donated to VAFS one mass spectrometry equipment (AccuTOF mass spectrometer) for the identification of wood, trained technical staff, and supported database preaparation for 460 tree species,… It can be said that the project has been implemented well, on schedule and with quality assurance.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A TH\u00d4NG S\u1ed0 C\u00d4NG NGH\u1ec6 \u00c9P PH\u1eb2NG \u0110\u1ebeN M\u1ed8T S\u1ed0 T\u00cdNH CH\u1ea4T C\u01a0 H\u1eccC V\u00c0 V\u1eacT L\u00dd C\u1ee6A V\u1eacT LI\u1ec6U COMPOSITE G\u1ed6 – NH\u1ef0A T\u1eea PH\u1ebe PH\u1ee4 PH\u1ea8M SAU CH\u1ebe BI\u1ebeN G\u1ed6\u00a0K\u1ebeT H\u1ee2P V\u1edaI R\u00c1C TH\u1ea2I NH\u1ef0A HDPE<\/p>\n

<\/a>Nguy\u1ec5n Tr\u1ecdng Ngh\u0129a, Nguy\u1ec5n V\u0103n \u0110\u1ecbnh, \u0110o\u00e0n Th\u1ecb B\u00edch Ng\u1ecdc<\/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

V\u1eadt li\u1ec7u composite g\u1ed7 – nh\u1ef1a (WPC) l\u00e0 lo\u1ea1i v\u1eadt li\u1ec7u composite \u0111\u01b0\u1ee3c t\u1ed5 h\u1ee3p ch\u1ee7 y\u1ebfu t\u1eeb c\u00e1c lo\u1ea1i nh\u1ef1a nhi\u1ec7t d\u1ebbo PE, HDPE, PP, PVC…, c\u00f3 th\u1ec3 t\u1eeb nh\u1ef1a t\u00e1i sinh ho\u1eb7c nguy\u00ean sinh c\u00f9ng v\u1edbi c\u1ed1t l\u00e0 c\u00e1c lo\u1ea1i b\u1ed9t g\u1ed7, s\u1ee3i g\u1ed7 hay c\u00e1c lo\u1ea1i s\u1ee3i th\u1ef1c v\u1eadt kh\u00e1c. S\u1ea3n ph\u1ea9m WPC c\u00f3 th\u1ec3 s\u1ea3n xu\u1ea5t b\u1eb1ng c\u00f4ng ngh\u1ec7 \u00e9p \u0111\u00f9n, \u00e9p phun hay \u00e9p ph\u1eb3ng s\u1eed d\u1ee5ng khu\u00f4n \u00e9p \u0111\u1ecbnh h\u00ecnh. Ngo\u00e0i ra, c\u00f3 th\u1ec3 c\u00f3 th\u00eam m\u1ed9t s\u1ed1 ch\u1ea5t ph\u1ee5 gia tr\u1ee3 li\u00ean k\u1ebft kh\u00e1c. B\u1ed9t g\u1ed7 \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb ph\u1ebf ph\u1ee5 ph\u1ea9m sau ch\u1ebf bi\u1ebfn g\u1ed7 k\u1ebft h\u1ee3p v\u1edbi r\u00e1c th\u1ea3i nh\u1ef1a HDPE t\u1eeb sinh ho\u1ea1t. K\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m cho th\u1ea5y: (1) Khi \u00e1p su\u1ea5t \u00e9p t\u0103ng\u00a0 t\u1eeb 0,8 MPa l\u00ean 1,2 MPa th\u00ec \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh t\u0103ng t\u1eeb 6,82 MPa\u00a0 l\u00ean 11,54 MPa, c\u0169ng t\u01b0\u01a1ng t\u1ef1 \u0111\u1ed1i v\u1edbi \u0111\u1ed9 b\u1ec1n k\u00e9o t\u0103ng t\u1eeb 8,83 MPa l\u00ean 10,91 MPa. (2) Th\u1eddi gian t\u0103ng 20 ph\u00fat l\u00ean 25 ph\u00fat th\u00ec \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o t\u0103ng, t\u0103ng ti\u1ebfp th\u1eddi gian l\u00ean 30 ph\u00fat th\u00ec \u0111\u1ed9 b\u1ec1n u\u1ed1n v\u00e0 \u0111\u1ed3 b\u1ec1n k\u00e9o \u0111\u1ec1u gi\u1ea3m. (3) \u0110i\u1ec1u n\u00e0y c\u0169ng t\u01b0\u01a1ng t\u1ef1 \u0111\u1ed1i v\u1edbi nhi\u1ec7t \u0111\u1ed9 \u00e9p, khi nhi\u1ec7t \u0111\u1ed9 \u00e9p t\u0103ng t\u1eeb 160 – 180o<\/sup>C th\u00ec \u0111\u1ed9 b\u1ec1n k\u00e9o, \u0111\u1ed9 b\u1ec1n u\u1ed1n, \u0111\u1ec1u t\u0103ng. Ng\u01b0\u1ee3c l\u1ea1i, khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean 200o<\/sup>C th\u00ec \u0111\u1ed9 b\u1ec1n c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c th\u00f4ng s\u1ed1 ch\u1ebf \u0111\u1ed9 \u00e9p ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u1ea1o ra v\u1eadt li\u1ec7u composite g\u1ed7 – nh\u1ef1a t\u1eeb ph\u1ebf ph\u1ee5 ph\u1ea9m g\u1ed7 sau ch\u1ebf bi\u1ebfn k\u1ebft h\u1ee3p v\u1edbi r\u00e1c th\u1ea3i nh\u1ef1a c\u00f3 ngu\u1ed3n g\u1ed1c HDPE v\u1edbi ph\u01b0\u01a1ng ph\u00e1p \u00e9p ph\u1eb3ng c\u00f3 khu\u00f4n l\u00e0: \u00c1p su\u1ea5t \u00e9p: 1,2 MPa; Th\u1eddi gian \u00e9p: 25 ph\u00fat; Nhi\u1ec7t \u0111\u1ed9 \u00e9p: 180o<\/sup>C.<\/td>\n<\/tr>\n

<\/a>Researching the effect of technology parameter of press on some mechanical and physical characteristics of wooden – plastic composite materials from wood processing waste combined with HDPE plastic waste<\/strong><\/p>\n

Wood-plastic composite material (WPC) is a composite material that is mainly composed of thermoplastics PE, HDPE, PP, PVC…, can be from recycled or primary plastic together with cores of other materials. aggregates of wood pulp, wood fibers or other actual fibers. WPC products can be manufactured by extrusion, injection molding or flat molding using a profiled mold. In addition, some other bonding aids may be added. Wood pulp is obtained from wood processing by-products combined with HDPE plastic waste from daily life. Experimental results show that: (1) When the pressing pressure increases from 0,8 MPa to 1,2 MPa, the static bending strength increases from 6,82 MPa to 11,54 MPa, the same is true for the increased tensile strength. from 8,83 MPa to 10,91 MPa, (2) The time increased from 20 minutes to 25 minutes, the static bending strength and tensile strength increased, then increasing the time to 30 minutes, the flexural strength and tensile strength both decreased. (3) This is also the same for pressing temperature, when pressing temperature increases from 160 – 180o<\/sup>C, the tensile strength, flexural strength, both increase. In contrast, when the temperature is increased to 200o<\/sup>C, the strength tends to increase reduce flat press. The research results have determined the suitable pressing mode parameters to create wood-plastic composite materials from wood waste after processing combined with plastic waste of HDPE origin with the flat pressing method with a mold of: Pressing pressure: 1,2 MPa; Pressing time: 25 minutes; Pressing temperature: 180o<\/sup>C.<\/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 2 – 2023 1. Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u00f3 ph\u1ea3i l\u00e0 t\u00ednh tr\u1ea1ng ti\u1ec1m n\u0103ng trong c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 Keo l\u00e1 li\u1ec1m \u1edf mi\u1ec1n Trung Basic density and modulus of elasticity as potential traits in improvement of wood quality of Acacia crassicarpa […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2470"}],"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=2470"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2470\/revisions"}],"predecessor-version":[{"id":2473,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2470\/revisions\/2473"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

<\/a>PRELIMINARY REPORT OF A PARASITOID WASP ON Achaea serva\u00a0<\/em>IN COTO ISLAND, QUANG NINH PROVINCE<\/p>\n