{"id":2486,"date":"2023-11-20T20:47:42","date_gmt":"2023-11-20T13:47:42","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2486"},"modified":"2023-11-24T15:02:45","modified_gmt":"2023-11-24T08:02:45","slug":"vietnam-journal-of-forest-science-number-5-2023","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2023\/11\/vietnam-journal-of-forest-science-number-5-2023\/","title":{"rendered":"Vietnam Journal of Forest Science Number 5-2023"},"content":{"rendered":"

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

<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 <\/strong>5<\/strong> – <\/strong>20<\/strong>2<\/strong>3<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nTh\u1ef1c tr\u1ea1ng ngu\u1ed3n t\u00e0i nguy\u00ean c\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm
\n\u1edf m\u1ed9t s\u1ed1 \u0111\u1ea3o v\u00f9ng Nam B\u1ed9,
\nVi\u1ec7t Nam<\/td>\n		Status of rare medical plant resources in some Southern Islands of Vietnam<\/td>\n\u0110\u1eb7ng V\u0103n S\u01a1n
\nNguy\u1ec5n Qu\u1ed1c B\u1ea3o
\nTr\u01b0\u01a1ng B\u00e1 V\u01b0\u01a1ng
\nPh\u1ea1m Qu\u1ed1c Tr\u1ecdng
\nH\u1ed3 Nguy\u1ec5n Qu\u1ef3nh Chi
\nL\u00ea V\u0103n Th\u1ecd
\nNguy\u1ec5n Th\u1ecb Mai H\u01b0\u01a1ng<\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng
\nin vitro<\/em> c\u00e1c d\u00f2ng T\u1ebfch nh\u1eadp n\u1ed9i K05 v\u00e0 PKU13<\/td>\n		Research on in vitro<\/em> propagation of introduced Tectona grandis<\/em> clones K05 and PKU13<\/td>\nL\u00ea S\u01a1n
\nMai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay
\n\u0110\u1ed7 Huy\u1ec1n Anh
\nN\u00f4ng Th\u1ecb Hu\u1ec7
\nNguy\u1ec5n Anh D\u0169ng
\nV\u0103n Thu Huy\u1ec1n
\nNguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc<\/td>\n		14<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng h\u1eefu t\u00ednh c\u00e2y Ba la m\u00edt (Artocarpus<\/em> chama<\/em> Buchanan-Hamilton)<\/td>\nResearch on the propagation
\nof Aartocarpus chama<\/em> Buchanan-Hamilton<\/td>\n		Nguy\u1ec5n Th\u1ecb Loan
\nV\u0169 V\u0103n \u0110\u1ecbnh
\nNguy\u1ec5n Qu\u1ed1c Th\u1ed1ng<\/td>\n		25<\/td>\n<\/tr>\n
4.<\/td>\nK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt tr\u1ed3ng c\u00e2y Ho\u00e0ng \u0111\u1eb1ng<\/td>\nCultivation techniques of Fibraurea tinctoria<\/em> Lour<\/td>\nD\u01b0\u01a1ng V\u0103n Th\u1ea3o
\nPh\u1ea1m Th\u1ecb Thu Th\u1ee7y<\/td>\n		33<\/td>\n<\/tr>\n
5.<\/td>\nHi\u1ec7n tr\u1ea1ng ph\u00e2n b\u1ed1 v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc lo\u00e0i G\u00f5 \u0111\u1ecf (Afzelia xylocarpa<\/em> (Kurz) Craib) t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Kon Ka Kinh, Gia Lai<\/td>\nThe distribution status and silvicultural characteristics of Afzelia xylocarpa<\/em> (Kurz) Craib in Kon Ka Kinh National\u00a0Park, Gia Lai province<\/td>\nLa \u00c1nh D\u01b0\u01a1ng
\nDo\u00e3n Ho\u00e0ng S\u01a1n
\nTr\u1ecbnh V\u0103n Hi\u1ec7u
\nH\u00e0 Huy Nh\u1eadt
\nHo\u00e0ng Thanh S\u01a1n<\/td>\n		40<\/td>\n<\/tr>\n
6.<\/td>\nX\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh sinh tr\u01b0\u1edfng v\u00e0 t\u0103ng tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng T\u1ebfch (Tectona grandis<\/em> Linn. f.) thu\u1ea7n lo\u00e0i t\u1ea1i Y\u00ean Ch\u00e2u, S\u01a1n La<\/td>\nBuilding models of growth
\nand incremental growth of Tectona grandis<\/em> Linn. f. plantation at Yen Chau,
\nSon La<\/td>\n		D\u01b0\u01a1ng V\u0103n \u0110o\u00e0n
\nNguy\u1ec5n C\u00f4ng Hoan<\/td>\n		50<\/td>\n<\/tr>\n
7.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng v\u00e0
\nn\u0103ng su\u1ea5t c\u1ee7a m\u1ed9t s\u1ed1 d\u00f2ng keo lai (acacia hybrid) tr\u1ed3ng tr\u00ean b\u1edd k\u00eanh t\u1ea1i Th\u1ea1nh H\u00f3a – Long An<\/td>\n		Growth and yield of acacia hybrid clones on embankment in Long An province<\/td>\nPh\u00f9ng V\u0103n Khang
\nTr\u1ea7n T\u00edn H\u1eadu
\nTr\u1ea7n Thanh Cao
\n\u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i
\nPh\u00f9ng H\u1ed3ng Ph\u00fac<\/td>\n		61<\/td>\n<\/tr>\n
8.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 th\u1eddi gian t\u1ec9a th\u01b0a t\u1edbi sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng keo lai t\u1ea1i Ph\u00fa Gi\u00e1o – B\u00ecnh D\u01b0\u01a1ng<\/td>\nEffect of thinning time
\nand intensity to the growth
\nand quality of the acacia hybrid plantation in Phu Giao,
\nBinh Duong<\/td>\n		Nguy\u1ec5n Xu\u00e2n H\u1ea3i
\nV\u0169 \u0110\u00ecnh H\u01b0\u1edfng
\nKi\u1ec1u M\u1ea1nh H\u00e0
\nNguy\u1ec5n V\u0103n \u0110\u0103ng<\/td>\n		67<\/td>\n<\/tr>\n
9.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e2y gi\u1eef l\u1ea1i sau khai th\u00e1c \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i (M. leucadendra<\/em>) chu k\u1ef3 2 tr\u00ean \u0111\u1ea5t ph\u00e8n t\u1ea1i huy\u1ec7n Th\u1ea1nh Ho\u00e1, t\u1ec9nh Long An<\/td>\nStudy on the effects of keeping trees after harvesting to the growth of Melaleuca lecadendra<\/em> plantations in the second cycle on acid sulphate soil, Long An province.<\/td>\nNg\u00f4 V\u0103n Ng\u1ecdc
\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t
\nTr\u1ea7n Kh\u00e1nh Hi\u1ec7u
\nTr\u1ea7n V\u0103n Nho<\/td>\n		77<\/td>\n<\/tr>\n
10.<\/td>\n\u1ed4 sinh th\u00e1i v\u00e0 m\u1ed1i quan h\u1ec7 c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y trong r\u1eebng
\nl\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh \u1edf Khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean v\u0103n h\u00f3a \u0110\u1ed3ng Nai<\/td>\n		Niche and interspecific association of tree species
\nin an evergreen broadleaved forest in Dong Nai Culture
\nand Nature Reserve<\/td>\n		Nguy\u1ec5n V\u0103n Qu\u00fd
\nV\u0169 M\u1ea1nh
\nNguy\u1ec5n V\u0103n H\u1ee3p
\nNguy\u1ec5n V\u0103n L\u00e2m
\nNguy\u1ec5n V\u0103n Th\u00e0nh
\nL\u00ea V\u0103n C\u01b0\u1eddng
\nNguy\u1ec5n H\u1ed3ng H\u1ea3i<\/td>\n		84<\/td>\n<\/tr>\n
11.<\/td>\nC\u1ea5u tr\u00fac v\u00e0 sinh kh\u1ed1i r\u1eebng t\u1ef1 nhi\u00ean t\u1ea1i huy\u1ec7n Ba Ch\u1ebd, t\u1ec9nh Qu\u1ea3ng Ninh<\/td>\nStructure and aboveground biomass of natural forests
\nin Ba Che district,
\nQuang Ninh province<\/td>\n		Tr\u1ea7n V\u0103n \u0110\u00f4
\nNguy\u1ec5n To\u00e0n Th\u1eafng
\nV\u0169 Ti\u1ebfn L\u00e2m
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nHo\u00e0ng Thanh S\u01a1n
\nNguy\u1ec5n Tr\u1ecdng Minh
\nTr\u1ea7n Anh H\u1ea3i
\nD\u01b0\u01a1ng Quang Trung
\nNguy\u1ec5n V\u0103n Tu\u1ea5n
\nNguy\u1ec5n Huy Ho\u00e0ng
\nPh\u1ea1m Ti\u1ebfn D\u0169ng
\n\u0110\u00e0o Trung \u0110\u1ee9c
\nTr\u01b0\u01a1ng Tr\u1ecdng Kh\u00f4i<\/td>\n		102<\/td>\n<\/tr>\n
12.<\/td>\nTh\u1ef1c tr\u1ea1ng v\u00e0 \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba g\u00e2y tr\u1ed3ng M\u1eafm tr\u1eafng (Avicennia alba<\/em> Blume) \u1edf v\u00f9ng ven bi\u1ec3n T\u00e2y Nam B\u1ed9<\/td>\nStatus and site conditions
\nfor planting Avicennia alba<\/em> Blume in the Southwest
\ncoastal region<\/td>\n		L\u00ea V\u0103n Th\u00e0nh
\nH\u00e0 \u0110\u00ecnh Long
\nPh\u1ea1m Ng\u1ecdc Th\u00e0nh
\nT\u1ea1 V\u0103n H\u00e2n
\n\u0110o\u00e0n Thanh T\u00f9ng
\nTr\u01b0\u01a1ng Quang Tr\u00ed
\nNguy\u1ec5n Xu\u00e2n \u0110\u00e0i
\nH\u00e0 V\u0103n N\u0103m
\nNguy\u1ec5n \u00dat Nh\u1ecf<\/td>\n		109<\/td>\n<\/tr>\n
13.<\/td>\nK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ph\u00f2ng ch\u1ed1ng S\u00e2u \u0103n l\u00e1 b\u1ed3 \u0111\u1ec1 (Syntypistis<\/em> sp.) \u1edf Ph\u00fa Th\u1ecd<\/td>\nReseacch on the control of Syntypistis<\/em> sp. leaf eating Styrax tonkinensis<\/em> in
\nPhu Tho province<\/td>\n		B\u00f9i Quang Ti\u1ebfp
\nTr\u1ea7n Thanh Tr\u0103ng<\/td>\n		120<\/td>\n<\/tr>\n
14.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a th\u1eddi gian
\nv\u00e0 nhi\u1ec7t \u0111\u1ed9 s\u1ea5y c\u1ee7a qu\u00e1 tr\u00ecnh s\u1ea5y \u0111\u00f3ng r\u1eafn keo \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, v\u1eadt l\u00fd c\u1ee7a s\u1ea3n ph\u1ea9m tre \u00e9p kh\u1ed1i<\/td>\n		Effects of duration and temperature of the heating process for resin curing on several mechanical and physical properties
\nof bamboo scrimber<\/td>\n		Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nNguy\u1ec5n Thanh T\u00f9ng
\nNguy\u1ec5n V\u0103n \u0110\u1ecbnh
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/td>\n		128<\/td>\n<\/tr>\n
15.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a th\u00f4ng s\u1ed1 ch\u1ebf \u0111\u1ed9 \u00e9p \u0111\u1ebfn m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 c\u01a1 h\u1ecdc c\u1ee7a v\u00e1n d\u00e1n s\u1eed d\u1ee5ng keo d\u1ea7u v\u1ecf h\u1ea1t \u0111i\u1ec1u<\/td>\nThe effect of the pressing parameters\u00a0on physical and mechanical properties of plywood using cashew nutshell oil adhesive as a good glue<\/td>\nNguy\u1ec5n Th\u1ecb Tr\u1ecbnh
\nNguy\u1ec5n Th\u1ecb H\u1eb1ng
\nNguy\u1ec5n B\u1ea3o Ng\u1ecdc<\/td>\n		136<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

<\/a>TH\u1ef0C TR\u1ea0NG NGU\u1ed2N T\u00c0I NGUY\u00caN C\u00c2Y D\u01af\u1ee2C LI\u1ec6U QU\u00dd HI\u1ebeM
\n\u1ede M\u1ed8T S\u1ed0 \u0110\u1ea2O V\u00d9NG NAM B\u1ed8, VI\u1ec6T NAM<\/p>\n

<\/a>\u0110\u1eb7ng V\u0103n S\u01a1n1,2*<\/sup>, Nguy\u1ec5n Qu\u1ed1c B\u1ea3o1<\/sup>, Tr\u01b0\u01a1ng B\u00e1 V\u01b0\u01a1ng1,2<\/sup>, Ph\u1ea1m Qu\u1ed1c Tr\u1ecdng1<\/sup>,
\nH\u1ed3 Nguy\u1ec5n Qu\u1ef3nh Chi1<\/sup>, L\u00ea V\u0103n Th\u1ecd1<\/sup>, Nguy\u1ec5n Th\u1ecb Mai H\u01b0\u01a1ng1<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Sinh h\u1ecdc nhi\u1ec7t \u0111\u1edbi, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n2<\/sup>H\u1ecdc vi\u1ec7n Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam<\/p>\n

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

M\u1ed9t nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m \u0111\u00e1nh gi\u00e1 t\u00ednh \u0111a d\u1ea1ng ngu\u1ed3n t\u00e0i nguy\u00ean c\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm tr\u00ean m\u1ed9t s\u1ed1 \u0111\u1ea3o v\u00f9ng Nam B\u1ed9, Vi\u1ec7t Nam. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 94 lo\u00e0i qu\u00fd hi\u1ebfm thu\u1ed9c 61 chi c\u1ee7a 35 h\u1ecd n\u1eb1m trong 3 ng\u00e0nh l\u00e0 D\u01b0\u01a1ng x\u1ec9, Th\u00f4ng v\u00e0 Ng\u1ecdc lan c\u00f3 gi\u00e1 tr\u1ecb d\u01b0\u1ee3c li\u1ec7u. Theo S\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007) th\u00ec c\u00e2y d\u01b0\u1ee3c li\u1ec7u \u1edf v\u00f9ng nghi\u00ean c\u1ee9u c\u00f3 21 lo\u00e0i Nguy c\u1ea5p (EN) v\u00e0 39 S\u1ebd nguy c\u1ea5p (VU); v\u00e0 theo Danh l\u1ee5c \u0110\u1ecf c\u00e2y thu\u1ed1c Vi\u1ec7t Nam (2019) th\u00ec c\u00f3 6 lo\u00e0i Nguy c\u1ea5p (EN) v\u00e0 7 S\u1ebd nguy c\u1ea5p (VU), c\u00f2n theo Ngh\u1ecb \u0111\u1ecbnh 84\/2021\/N\u0110-CP c\u1ee7a Ch\u00ednh ph\u1ee7 th\u00ec c\u00f3 4 lo\u00e0i thu\u1ed9c nh\u00f3m IA v\u00e0 44 lo\u00e0i thu\u1ed9c nh\u00f3m IIA. C\u00f3 8 h\u1ecd th\u1ef1c v\u1eadt nhi\u1ec1u lo\u00e0i nh\u1ea5t \u0111\u01b0\u1ee3c ghi nh\u1eadn v\u1edbi 64 lo\u00e0i chi\u1ebfm 68% t\u1ed5ng s\u1ed1 lo\u00e0i, trong \u0111\u00f3 h\u1ecd Lan (Orchidaceae) c\u00f3 nhi\u1ec1u lo\u00e0i nh\u1ea5t v\u1edbi 27 lo\u00e0i v\u00e0 \u00edt nh\u1ea5t l\u00e0 h\u1ecd Xoan (Meliaceae) v\u1edbi 4 lo\u00e0i. Nghi\u00ean c\u1ee9u c\u0169ng \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c nh\u00f3m d\u1ea1ng s\u1ed1ng c\u1ee7a c\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm, bao g\u1ed3m: c\u00e2y ph\u1ee5 sinh (27 lo\u00e0i), g\u1ed7 l\u1edbn (18 lo\u00e0i), c\u00e2y b\u1ee5i\/b\u1ee5i tr\u01b0\u1eddn (17 lo\u00e0i), g\u1ed7 nh\u1ecf (13 lo\u00e0i), th\u00e2n th\u1ea3o (12 lo\u00e0i) v\u00e0 d\u00e2y leo (7 lo\u00e0i). R\u1eebng k\u00edn th\u01b0\u1eddng xanh m\u01b0a \u1ea9m nhi\u1ec7t \u0111\u1edbi, r\u1eebng ng\u1eadp m\u1eb7n v\u00e0 r\u1eebng t\u1ef1 nhi\u00ean \u0111\u1ed3i n\u00fai th\u1ea5p l\u00e0 n\u01a1i ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm \u1edf v\u00f9ng nghi\u00ean c\u1ee9u.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm, \u0111a d\u1ea1ng, c\u00e1c \u0111\u1ea3o Nam B\u1ed9, Vi\u1ec7t Nam.<\/p>\n

<\/a>STATUS OF RARE MEDICAL PLANT RESOURCES IN SOME SOUTHERN ISLANDS
\nOF VIETNAM<\/p>\n

Dang Van Son1,2*<\/sup>, Nguyen Quoc Bao1<\/sup>, Truong Ba Vuong1,2<\/sup>, Pham Quoc Trong1<\/sup>,
\nHo Nguyen Quynh Chi1<\/sup>, Le Van Tho1<\/sup>, Nguyen Thi Mai Huong1<\/sup>
\n<\/sup>1<\/sup><\/em>Institute of Tropical Biology, Vietnam Academy of Science and Technology<\/em>
\n<\/sup><\/em>2<\/sup><\/em>Graduate University of Science and Technology, Vietnam Academy of Science and Technology<\/em><\/p>\n

SUMMARY<\/p>\n

A study of the diversity of rare medicinal plants from the Southern islands of Vietnam was carried out. The study results identified 94 species of rare medicinal plants belonging to 61 genera, and 35 families of three phyla of vascular plants (Polypodiophyta, Pinophyta, and Magnoliophyta). There are 21 species at Endangered and 39 species at Vulnerable according to Vietnam Red Data Book (Part II, Plants, 2007), and 6 species at Endangered and 7 species at Vulnerable according to The Red List of Medicinal Plants in Vietnam (2019), and 4 species in group IA and 44 species in group IIA of Decree No. 84\/2021\/ND-CP. There are 8 plant families with the most species recorded with 64 species, accounting for 68% of the total species, of which Orchidaceae is the most with 27 species and Meliaceae is the least with 4 species. Life forms of rare medicinal plants were divided into six groups including epiphytes (27 species), big trees (18 species), shrubs (17 species), small trees (13 species), grasses (12 species), and lianas (7 species). The rare medicinal plants are mainly distributed in evergreen forests, mangrove forests and low mountains natural forests.<\/p>\n

Keywords:<\/em><\/strong> Rare medicinal plants, diversity, Southern islands, Vietnam.<\/p>\n

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

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG in vitro<\/em>
\nC\u00c1C D\u00d2NG T\u1ebeCH NH\u1eacP N\u1ed8I K05 V\u00c0 PKU13<\/p>\n

<\/a>L\u00ea S\u01a1n1<\/sup>, Mai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay1<\/sup>, \u0110\u1ed7 Huy\u1ec1n Anh2<\/sup>, N\u00f4ng Th\u1ecb Hu\u1ec72<\/sup>,
\nNguy\u1ec5n Anh D\u0169ng1<\/sup>, V\u0103n Thu Huy\u1ec1n1<\/sup>, Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc3<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n2 <\/sup>H\u1ecdc vi\u1ec7n N\u00f4ng nghi\u1ec7p Vi\u1ec7t Nam
\n3<\/sup> Khoa N\u00f4ng L\u00e2m, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y B\u1eafc<\/p>\n

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

T\u1ebfch l\u00e0 lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao v\u1edbi di\u1ec7n t\u00ednh r\u1eebng tr\u1ed3ng \u01b0\u1edbc t\u00ednh \u0111\u1ea1t 6 tri\u1ec7u ha tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. T\u1ebfch \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o n\u01b0\u1edbc ta kho\u1ea3ng 100 n\u0103m tr\u01b0\u1edbc v\u00e0 hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c ghi nh\u1eadn l\u00e0 m\u1ed9t trong nh\u1eefng lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 l\u1ef1c. Tuy nhi\u00ean, nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng v\u00e0 ph\u00e1t tri\u1ec3n gi\u1ed1ng T\u1ebfch c\u00f3 n\u0103ng su\u1ea5t ch\u1ea5t l\u01b0\u1ee3ng cao cho s\u1ea3n xu\u1ea5t c\u00f2n g\u1eb7p m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 gi\u1edbi h\u1ea1n. G\u1ea7n \u0111\u00e2y m\u1ed9t s\u1ed1 d\u00f2ng T\u1ebfch c\u00f3 n\u0103ng su\u1ea5t cao \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u1eadp v\u00e0o n\u01b0\u1edbc ta \u0111\u1ec3 tr\u1ed3ng th\u1eed nghi\u1ec7m, vi\u1ec7c nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng in vitro<\/em> cho c\u00e1c d\u00f2ng n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft v\u00e0 c\u00f3 \u00fd ngh\u0129a. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, s\u1eed d\u1ee5ng ch\u1ea5t kh\u1eed tr\u00f9ng HgCl2<\/sub> 0,05% trong kho\u1ea3ng th\u1eddi gian 10 ph\u00fat l\u00e0 hi\u1ec7u qu\u1ea3 nh\u1ea5t cho c\u1ea3 2 d\u00f2ng T\u1ebfch nghi\u00ean c\u1ee9u v\u1edbi t\u1ef7 l\u1ec7 m\u1eabu b\u1eadt ch\u1ed3i \u0111\u1ea1t tr\u00ean 20%. M\u00f4i tr\u01b0\u1eddng MS c\u1ea3i ti\u1ebfn (MS*) c\u00f3 b\u1ed5 sung BAP n\u1ed3ng \u0111\u1ed9 0,5 mg\/l v\u00e0 0,05 mg\/l \u03b1-NAA v\u00e0o m\u00f4i tr\u01b0\u1eddng nu\u00f4i c\u1ea5y cho k\u1ebft qu\u1ea3 nh\u00e2n ch\u1ed3i t\u1ed1t nh\u1ea5t v\u1edbi d\u00f2ng K05 trong khi m\u00f4i tr\u01b0\u1eddng MS* + 0,5 mg\/l BAP v\u00e0 0,01 mg\/l \u03b1-NAA l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t cho d\u00f2ng PKU13. M\u00f4i tr\u01b0\u1eddng t\u1ed1i \u01b0u \u0111\u1ec3 t\u1ea1o r\u1ec5 cho c\u00e2y in vitro<\/em> ho\u00e0n ch\u1ec9nh l\u00e0 1\/2MS + 4 g\/l agar + 30 g\/l \u0111\u01b0\u1eddng + 0,75 mg\/l IBA cho t\u1ef7 l\u1ec7 ch\u1ed3i ra r\u1ec5 \u0111\u1ea1t kho\u1ea3ng 80%, hi\u1ec7u qu\u1ea3 nh\u1ea5t trong c\u00e1c c\u00f4ng th\u1ee9c nghi\u00ean c\u1ee9u.<\/p>\n

T\u1eeb kho\u00e1:<\/em> D\u00f2ng K05, d\u00f2ng PKU13, nu\u00f4i c\u1ea5y m\u00f4, <\/em>T\u1ebfch.<\/p>\n

<\/a>Research on in vitro<\/em> propagation of introduced Tectona grandis<\/em> <\/strong>
\nclones K05 and PKU13<\/strong><\/p>\n

Le Son1<\/sup>, Mai Thi Phuong Thuy1<\/sup>, Do Huyen Anh2<\/sup>, Nong Thi Hue2<\/sup>, Nguyen Anh Dung1<\/sup>,
\nVan Thu Huyen1<\/sup>, Nguyen Thi Bich Ngoc3<\/sup><\/p>\n

1<\/sup> Research Institute of Forest Tree Improvement and Biotechnology
\n2 <\/sup>Vietnam national University of Agriculture
\n3<\/sup> Faculty of Agriculture and Forestry, Tay Bac University<\/p>\n

<\/a>Summary<\/p>\n

Tectona grandis<\/em> L.f. is the most valuable tropical hardwood species with an estimate of approximately 6 million ha plantation worldwide. Teak was introduced to Vietnam about hundred years ago and now considered as one of main forest planting species. However, teak development program in the country faced some limitation due to long span rotation and narrow genetic bases. Recently, some fast-growing teak clones were imported to enrich genetic variation of breeding population. The propagation by tissue culture is considered as the most efficient tool for mass proliferation. In this study, the protocol for in vitro<\/em> propagation was conducted. The results showed that the suitable sterilization is using HgCl2<\/sub> 0.05% for 10 minutes with the success rate reaching 20%. The suitable medium for shoot multiplication of clone K05 is MS* + BAP 0.5 mg\/l + 0.05 mg\/l \u03b1-NAA, whilethe best multiplication medium for clone PKU13 is MS* + BAP 0.5 mg\/l + 0.01 mg\/l \u03b1-NAA. The rooting mediu m for both clones is 1\/2MS + IBA 0.75 mg\/l with the percentage of rooted explant reaching approximately 80%.<\/p>\n

Keywords:<\/em><\/strong> Clone K05, clone PKU13, in vitro<\/em> propagation, Tectona grandis <\/em>L.f.<\/p>\n

 <\/p>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG H\u1eeeU T\u00cdNH C\u00c2Y BA LA M\u00cdT
\n(Artocarpus chama <\/em>Buchanan-Hamilton)<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Loan, V\u0169 V\u0103n \u0110\u1ecbnh, Nguy\u1ec5n Qu\u1ed1c Th\u1ed1ng<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng<\/p>\n

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

Ba la m\u00edt (Artocarpus chama <\/em>Buchanan-Hamilton)<\/em> thu\u1ed9c h\u1ecd D\u00e2u t\u1eb1m (Moraceae), l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u0111a t\u00e1c d\u1ee5ng c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao, sinh tr\u01b0\u1edfng nhanh. G\u1ed7 Ba la m\u00edt n\u1eb7ng, c\u1ee9ng, b\u1ec1n, c\u00f3 \u0111\u1eb7c t\u00ednh c\u01a1 l\u00fd t\u1ed1t, \u00edt b\u1ecb m\u1ed1i m\u1ecdt, g\u1ed7 d\u00f9ng \u0111\u1ec3 \u0111\u00f3ng \u0111\u1ed3 n\u1ed9i th\u1ea5t cao c\u1ea5p, \u0111\u1ed3 gia d\u1ee5ng. Ba la m\u00edt l\u00e0 c\u00e2y g\u1ed7 l\u1edbn, trong \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean c\u00e2y c\u00f3 th\u1ec3 cao t\u1eeb 15 – 30 m, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 40 – 50 cm (th\u1eadm ch\u00ed c\u00f3 nh\u1eefng c\u00e2y \u0111\u01b0\u1eddng k\u00ednh l\u00ean \u0111\u1ebfn h\u01a1n 1 m), th\u00e2n c\u00e2y h\u00ecnh tr\u1ee5, th\u1eb3ng, chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh l\u1edbn. Ba la m\u00edt l\u00e0 lo\u00e0i c\u00e2y tr\u1ed3ng c\u00f3 ti\u1ec1m n\u0103ng \u0111\u1ec3 ph\u00e1t tri\u1ec3n tr\u1ed3ng r\u1eebng kinh doanh g\u1ed7 l\u1edbn. Tuy nhi\u00ean, c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 nh\u00e2n gi\u1ed1ng lo\u00e0i c\u00e2y n\u00e0y c\u00f2n r\u1ea5t h\u1ea1n ch\u1ebf. Ch\u00ednh v\u00ec v\u1eady, vi\u1ec7c nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng lo\u00e0i c\u00e2y n\u00e0y r\u1ea5t c\u00f3 \u00fd ngh\u0129a trong c\u00f4ng t\u00e1c cung c\u1ea5p ngu\u1ed3n gi\u1ed1ng ph\u1ee5c v\u1ee5 v\u00e0 ph\u00e1t tri\u1ec3n tr\u1ed3ng r\u1eebng kinh doanh g\u1ed7 l\u1edbn t\u1ea1i Vi\u1ec7t Nam. H\u1ea1t Ba la m\u00edt khi ng\u00e2m trong dung d\u1ecbch thu\u1ed1c t\u00edm (KMnO4<\/sub>) v\u1edbi nhi\u1ec7t \u0111\u1ed9 dung d\u1ecbch 40o<\/sup>C n\u1ed3ng \u0111\u1ed9 0,05% trong th\u1eddi gian 2 gi\u1edd cho t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m cao nh\u1ea5t (92,7%). Trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m, khi che s\u00e1ng 50% c\u00e2y con c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng cao nh\u1ea5t (77,8%) v\u00e0 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t (chi\u1ec1u cao \u0111\u1ea1t 52,3 cm, \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea1t 0,62 cm). C\u00f4ng th\u1ee9c ru\u1ed9t b\u1ea7u (\u0111\u1ea5t m\u1eb7t 98% + 1% ph\u00e2n l\u00e2n v\u00e0 1% kali) c\u00e2y con sinh tr\u01b0\u1edfng t\u1ed1t v\u1edbi chi\u1ec1u cao trung b\u00ecnh \u0111\u1ea1t 52,1 cm v\u00e0 \u0111\u01b0\u1eddng trung b\u00ecnh \u0111\u1ea1t 0,61 cm.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ba la m\u00edt, chi\u1ec1u cao v\u00fat ng\u1ecdn, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c, gieo h\u1ea1t, nh\u00e2n gi\u1ed1ng, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m.<\/p>\n

<\/a>Research on the propagation of Aartocarpus chama <\/em>Buchanan-Hamilton<\/strong><\/p>\n

Nguyen Thi Loan, Vu Van Dinh, Nguyen Quoc Thong<\/p>\n

\u00a0<\/strong>Forest Protection Research Center<\/p>\n

SUMMARY<\/p>\n

Artocarpus chama<\/em> Buchanan-Hamilton belongs to the Moraceae family and is a multi-purpose native tree with high economic value and fast growth. Artocarpus chama<\/em> wood is heavy, hard, durable, has good mechanical properties, is less susceptible to termites, and is used to make high-end furniture and household appliances. Artocarpus chama<\/em> is a large tree, under natural conditions the tree can be 15 – 30 m in height, 40 – 50 cm in diameter at breast height (there are even trees with a diameter of more than 1 m), the trunk is cylindrical and straight, height below large branches. Artocarpus chama <\/em>Buchanan-Hamilton is a plant species with potential to develop large timber forests and businesses. However, researches on the propagation of this plant are very limited. Therefore, research into breeding this tree species is very meaningful in providing seed sources to serve and develop large timber plantations and businesses in Vietnam. Artocarpus chama<\/em> seeds soaked in potassium permanganate (KMnO4<\/sub>) solution at 0.05% concentration for 2 hours gave the highest germination rate (92.7%). During the nursery stage, when 50% of the light was covered, the seedlings had the highest survival rate (77.8%) and best growth (height reached 52.3 cm, diameter reached 0.62 cm). With the potting formula (98% topsoil + 1% phosphate and 1% potassium), the seedlings grow well with an average height of 52.1 cm and an average diameter of 0.61 cm.<\/p>\n

Keywords:<\/em><\/strong> Artocarpus chama <\/em>Buchanan-Hamilton, total height, root diameter, seeding, propagation, germination rate.<\/p>\n

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

<\/a><\/a>K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT TR\u1ed2NG C\u00c2Y HO\u00c0NG \u0110\u1eb0NG<\/p>\n

<\/a>D\u01b0\u01a1ng V\u0103n Th\u1ea3o1<\/sup>, Ph\u1ea1m Th\u1ecb Thu Th\u1ee7y2<\/sup><\/p>\n

1<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean
\n2<\/sup> Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng<\/p>\n

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

C\u00e2y Ho\u00e0ng \u0111\u1eb1ng (Fibraurea tinctoria <\/em>Lour) \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng l\u00e0m d\u01b0\u1ee3c li\u1ec7u \u1edf m\u1ed9t s\u1ed1 n\u01a1i do nh\u1eefng \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 d\u01b0\u1ee3c t\u00ednh v\u00e0 kh\u1ea3 n\u0103ng th\u00edch nghi t\u1ed1t. Tuy nhi\u00ean, ch\u01b0a c\u00f3 nhi\u1ec1u k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 k\u1ef9 thu\u1eadt tr\u1ed3ng lo\u00e0i c\u00e2y n\u00e0y. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m x\u00e1c \u0111\u1ecbnh m\u1eadt \u0111\u1ed9 tr\u1ed3ng, \u0111\u1ed9 t\u00e0n che v\u00e0 ph\u00e2n b\u00f3n th\u00edch h\u1ee3p cho c\u00e2y Ho\u00e0ng \u0111\u1eb1ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u t\u1ea1i Ngh\u1ec7 An cho th\u1ea5y m\u1eadt \u0111\u1ed9 tr\u1ed3ng kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y Ho\u00e0ng \u0111\u1eb1ng. \u0110\u1ed9 t\u00e0n che c\u0169ng kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh nh\u01b0ng c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng chi\u1ec1u d\u00e0i th\u00e2n. Hai c\u00f4ng th\u1ee9c b\u00f3n th\u00fac ph\u00e2n 0,2 kg NPK + 1 kg ph\u00e2n chu\u1ed3ng hoai ho\u1eb7c 0,3 kg ph\u00e2n vi sinh S\u00f4ng Gianh\/c\u00e2y\/n\u0103m cho sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t. Qua \u0111\u00f3 cho th\u1ea5y, c\u00f3 th\u1ec3 tr\u1ed3ng c\u00e2y Ho\u00e0ng \u0111\u1eb1ng d\u01b0\u1edbi t\u00e1n r\u1eebng c\u00f3 \u0111\u1ed9 t\u00e0n che 0,4 – 0,6, m\u1eadt \u0111\u1ed9 4.400 c\u00e2y\/ha v\u00e0 b\u00f3n 0,2 kg NPK + 1 kg ph\u00e2n chu\u1ed3ng hoai\/c\u00e2y\/n\u0103m ho\u1eb7c 0,2 kg NPK + 0,3 kg ph\u00e2n vi sinh S\u00f4ng Gianh\/c\u00e2y\/n\u0103m. \u0110\u1ec3 ph\u00e1t tri\u1ec3n th\u00e0nh c\u00f4ng lo\u00e0i c\u00e2y n\u00e0y c\u1ea7n ho\u00e0n thi\u1ec7n k\u1ef9 thu\u1eadt tr\u1ed3ng th\u00e2m canh \u0111\u1ed3ng th\u1eddi ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng, nh\u00e2n gi\u1ed1ng v\u00e0 ph\u00f2ng tr\u1eeb s\u00e2u b\u1ec7nh h\u1ea1i c\u00e2y Ho\u00e0ng \u0111\u1eb1ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>C\u00e2y thu\u1ed1c, Fibraurea tinctoria <\/em>Lour,<\/em> g\u00e2y tr\u1ed3ng, Ho\u00e0ng \u0111\u1eb1ng<\/p>\n

<\/a>Cultivation techniques of Fibraurea tinctoria <\/em>Lour<\/strong><\/p>\n

Duong Van Thao1<\/sup>, Pham Thi Thu Thuy2<\/sup><\/p>\n

1<\/sup> Thai Nguyen University of Agriculture and Forestry
\n2<\/sup> Forest Protection Research Center<\/p>\n

SUMMARY<\/p>\n

Fibraurea tinctoria<\/em> Lour has been cultivated in many places due to its outstanding advantages in medicinal properties and good adaptability. However, there are not many research results on the cultivation technique of this plant. This study was carried out to determine the appropriate planting density, canopy and fertilizer for Fibraurea tinctoria <\/em>Lour. Research results in Nghe An showed that planting density did not affect the growth of Fibraurea tinctoria <\/em>Lour. Canopy also did not affect growth in diameter but had a clear effect on growth in height. Two fertilizer treatments of 0.2 kg NPK + 1 kg of manure or 0.2 kg NPK + 0.3 kg of Song Gianh microbiological fertilizer\/plant\/year resulted the best growth. Thereby, it is possible to cultivate Fibraurea tinctoria<\/em> Lour under the forest canopy with canopy cover 0.4 – 0.6, density 4,400 seedlings\/ha and apply 0.2 kg NPK +1 kg manure\/plant\/year or 0.2 kg NPK + 0.3 kg of Song Gianh microbial fertilizer\/plant\/year. In order to successfully cultivate this species, it is necessary to continue improving intensive cultivation techniques and conduct research on selection, propagation and pest control of Fibraurea tinctoria <\/em>Lour.<\/p>\n

Keywords:<\/em><\/strong> Cultivation, <\/em>Fibraurea tinctoria <\/em>Lour, medicinal plant<\/p>\n

 <\/p>\n

<\/a>HI\u1ec6N TR\u1ea0NG PH\u00c2N B\u1ed0 V\u00c0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC\u00a0LO\u00c0I G\u00d5 \u0110\u1ece (Afzelia xylocarpa <\/em>(Kurz) Craib)
\nT\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA KON KA KINH, GIA LAI<\/p>\n

<\/a>La \u00c1nh D\u01b0\u01a1ng1<\/sup>, Do\u00e3n Ho\u00e0ng S\u01a1n1<\/sup>, Tr\u1ecbnh V\u0103n Hi\u1ec7u1<\/sup>, H\u00e0 Huy Nh\u1eadt1<\/sup>, Ho\u00e0ng Thanh S\u01a1n2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh<\/p>\n

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

C\u00e2y G\u00f5 \u0111\u1ecf hay c\u00f2n g\u1ecdi l\u00e0 C\u00e0 te (Afzelia xylocarpa <\/em>(Kurz) Craib) thu\u1ed9c h\u1ecd \u0110\u1eadu (Fabaceae), \u0111\u00e2y l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 qu\u00fd hi\u1ebfm, g\u1ed7 c\u00f3 t\u00ednh ch\u1ea5t t\u1ed1t, m\u1ecbn, th\u1edb th\u1eb3ng, \u0111\u1eb9p, n\u1eb7ng v\u00e0 n\u1eb1m trong nh\u00f3m I theo TCVN 12919-2 n\u0103m 2019. B\u00e0i vi\u1ebft nh\u1eb1m m\u1ee5c \u0111\u00edch cung c\u1ea5p th\u00f4ng tin khoa h\u1ecdc v\u1ec1 hi\u1ec7n tr\u1ea1ng ph\u00e2n b\u1ed1, m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e2y G\u00f5 \u0111\u1ecf t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Kon Ka Kinh, t\u1ec9nh Gia Lai. C\u00e2y G\u00f5 \u0111\u1ecf ph\u00e2n b\u1ed1 \u1edf nh\u1eefng v\u00f9ng c\u00f3 \u0111\u1ed9 cao t\u1eeb 400 \u0111\u1ebfn 700 m. Qua \u0111i\u1ec1u tra c\u00e1c tuy\u1ebfn t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia Kon Ka Kinh \u0111\u00e3 thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c 03 \u00f4 ti\u00eau chu\u1ea9n (OTC) ghi nh\u1eadn s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e2y G\u00f5 \u0111\u1ecf trong t\u1ef1 nhi\u00ean. M\u1eadt \u0111\u1ed9 t\u1ea7ng c\u00e2y cao c\u1ee7a l\u00e2m ph\u1ea7n dao \u0111\u1ed9ng t\u1eeb 235 – 275 c\u00e2y\/ha, \u0111\u01b0\u1eddng k\u00ednh D1,3<\/sub> trung b\u00ecnh c\u00f3 s\u1ef1 thay \u0111\u1ed5i kh\u00f4ng l\u1edbn t\u1eeb 24,3 – 26,8 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh t\u1eeb 15,7 – 17,0 m. C\u00e2y G\u00f5 \u0111\u1ecf c\u00f3 m\u1eadt \u0111\u1ed9 \u0111\u1ea1t t\u1eeb 25 – 60 c\u00e2y\/ha v\u00e0 tham gia v\u00e0o 03 c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y cao. M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh c\u1ee7a l\u00e2m ph\u1ea7n t\u1eeb 2.800 – 2.960 c\u00e2y\/ha. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh c\u1ee7a l\u00e2m ph\u1ea7n h\u1ea7u h\u1ebft t\u1ed1t v\u1edbi t\u1ef7 l\u1ec7 cao nh\u1ea5t t\u1ea1i OTC GL2 v\u1edbi 77,8%. G\u00f5 \u0111\u1ecf ch\u1ee7 y\u1ebfu l\u00e0 t\u00e1i sinh h\u1ea1t, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u1ed1t v\u00e0 t\u00e1i sinh ch\u1ee7 y\u1ebfu l\u00e0 \u1edf c\u1ea5p chi\u1ec1u cao l\u1edbn h\u01a1n 100 cm. Do c\u00e2y G\u00f5 \u0111\u1ecf t\u1ea1i Gia Lai c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ed1t nh\u01b0ng do l\u00e0 lo\u00e0i c\u00e2y sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n ch\u1eadm n\u00ean th\u1eddi gian tham gia v\u00e0o t\u1ea7ng t\u00e1n l\u00e2u v\u00ec v\u1eady c\u1ea7n c\u00f3 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 ngay t\u1eeb c\u00e2y con. V\u00ec v\u1eady, c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o t\u1ed3n v\u00e0 x\u00fac ti\u1ebfn t\u00e1i sinh c\u00e2y G\u00f5 \u0111\u1ecf l\u00e0 c\u1ea7n thi\u1ebft \u1edf V\u01b0\u1eddn Qu\u1ed1c gia Kon Ka Kinh.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n, V\u01b0\u1eddn Qu\u1ed1c gia Kon Ka Kinh, G\u00f5 \u0111\u1ecf, <\/em>ph\u00e2n b\u1ed1, \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc<\/p>\n

<\/a>The distribution status and silvicultural characteristics <\/strong>
\nof Afzelia xylocarpa <\/em>(Kurz) Craib in Kon Ka Kinh National\u00a0Park, Gia Lai province<\/strong><\/p>\n

La Anh Duong1<\/sup>, Doan Hoang Son1<\/sup>, Trinh Van Hieu1<\/sup>, Ha Huy Nhat1<\/sup>, Hoang Thanh Son2<\/sup><\/p>\n

1<\/sup> Research Institute of Forest Tree Improvement and Biotechnology
\n2<\/sup> Silvicultural Research Insititute<\/p>\n

summary<\/p>\n

Afzelia xylocarpa <\/em>(Kurz) Craib belongs to Fabaceae family, this is a rare species of wood, the wood has good properties, smooth, straight grain, beautiful, weight and in group I according to TCVN 12919-2 in 2019. The article aims to provide scientific information on the distribution status and some silvicultural of A. xylocarpa <\/em>in Kon Ka Kinh National\u00a0Park, Gia Lai province. A. xylocarpa <\/em>is distributed in areas with altitude from 400 to 700 m. Through investigation of routes in Kon Ka Kinh National\u00a0Park, 03 OTCs have been established to record the occurrence of A. xylocarpa <\/em>in nature. The density of the tall tree layer of the forest stand ranges from 235 trees\/ha to 275 trees\/ha, the average D1,3<\/sub> diameter does not change much from 24.3 cm to 26.8 cm, the average crown height ranges from 15.7 m to 17.0 m. A. xylocarpa <\/em>had a density of 25 trees\/ha to 60 trees\/ha and participate in 03 formulas to form high tree layers. The density of regenerated trees in the forest stand is from 2,800 to 2,960 trees\/ha. The quality of regenerated trees in the forest stands is mostly good with the highest rate at OTC GL2 at 77.8%. A. xylocarpa <\/em>was mainly regenerated by seeds, had good quality, and regenerates mainly at the height of more than 100 cm. Due to A. xylocarpa <\/em>in Gia Lai has good regeneration ability, but because it is a slow-growing and developing tree species, it takes a long time to participate in the canopy layer, so protection measures are needed right from the seedlings. Therefore, solutions to preserve and promote the regeneration of A. xylocarpa <\/em>are necessary in Kon Ka Kinh National\u00a0Park.<\/p>\n

Keywords:<\/em><\/strong> Conservation, Kon Ka Kinh National\u00a0Park, Afzelia xylocarpa <\/em>(Kurz) Craib, distribution, silvicultural characteristics<\/p>\n

 <\/p>\n

<\/a>X\u00c2Y D\u1ef0NG M\u00d4 H\u00ccNH SINH TR\u01af\u1edeNG V\u00c0 T\u0102NG TR\u01af\u1edeNG
\nR\u1eeaNG TR\u1ed2NG T\u1ebeCH (Tectona grandis <\/em>Linn. f.) THU\u1ea6N LO\u00c0I
\nT\u1ea0I Y\u00caN CH\u00c2U, S\u01a0N LA<\/p>\n

<\/a>D\u01b0\u01a1ng V\u0103n \u0110o\u00e0n, Nguy\u1ec5n C\u00f4ng Hoan<\/p>\n

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

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

Trong nghi\u00ean c\u1ee9u c\u0169ng nh\u01b0 th\u1ef1c ti\u1ec5n s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p, vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng theo th\u1eddi gian lu\u00f4n \u0111\u01b0\u1ee3c xem l\u00e0 nhi\u1ec7m v\u1ee5 quan tr\u1ecdng, l\u00e0m c\u01a1 s\u1edf x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m khai th\u00e1c ch\u00ednh. V\u00ec v\u1eady, vi\u1ec7c x\u00e2y d\u1ef1ng nh\u1eefng m\u00f4 h\u00ecnh sinh tr\u01b0\u1edfng (\u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, th\u1ec3 t\u00edch th\u00e2n c\u00e2y, tr\u1eef l\u01b0\u1ee3ng r\u1eebng,… theo tu\u1ed5i) tr\u00ean c\u00e2y c\u00e1 th\u1ec3 v\u00e0 l\u00e2m ph\u1ea7n r\u1eebng tr\u1ed3ng b\u1eb1ng nh\u1eefng ph\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc l\u00e0 c\u1ea7n thi\u1ebft. B\u00e0i vi\u1ebft n\u00e0y ph\u00e2n t\u00edch v\u00e0 d\u1ef1 b\u00e1o qu\u00e1 tr\u00ecnh sinh tr\u01b0\u1edfng, t\u0103ng tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng T\u1ebfch b\u1eb1ng c\u00e2y ti\u00eau chu\u1ea9n t\u1ea1i huy\u1ec7n Y\u00ean Ch\u00e2u, t\u1ec9nh S\u01a1n La nh\u1eb1m x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng th\u01b0\u1eddng xuy\u00ean, t\u0103ng tr\u01b0\u1edfng \u0111\u1ecbnh k\u1ef3 theo tu\u1ed5i l\u00e0m c\u01a1 s\u1edf d\u1ef1 b\u00e1o tu\u1ed5i khai th\u00e1c ch\u00ednh cho l\u00e2m ph\u1ea7n. N\u0103m h\u00e0m sinh tr\u01b0\u1edfng \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00f4 t\u1ea3 qu\u00e1 tr\u00ecnh sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh th\u00e2n (D1,3<\/sub>), chi\u1ec1u cao (Hvn<\/sub>) v\u00e0 th\u1ec3 t\u00edch (V) cho \u0111\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u nh\u01b0 h\u00e0m: Schumacher, Koller, Korf, Terazaki v\u00e0 h\u00e0m Gompertz, trong \u0111\u00f3 ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1ee3c ch\u1ecdn l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 c\u00e1c tham s\u1ed1 t\u1ed3n t\u1ea1i trong t\u1ed5ng th\u1ec3, h\u1ec7 s\u1ed1 x\u00e1c \u0111\u1ecbnh l\u1edbn nh\u1ea5t (R2<\/sup>max<\/sub>). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, sinh tr\u01b0\u1edfng v\u00e0 t\u0103ng tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh th\u00e2n (D1,3<\/sub>), chi\u1ec1u cao (Hvn<\/sub>) v\u00e0 th\u1ec3 t\u00edch (V) \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 r\u1ea5t t\u1ed1t b\u1eb1ng h\u00e0m Schumacher v\u1edbi h\u1ec7 s\u1ed1 x\u00e1c \u0111\u1ecbnh t\u1eeb R2<\/sup> t\u1eeb 0,994 – 0,998, c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh sinh tr\u01b0\u1edfng c\u00f3 d\u1ea1ng: D = 49,261*exp (-3,871\/A**0,450); H = 54,238*exp (-5.011\/A**0,480); V = 2,167*exp (-10,468\/A** 0,529).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Sinh tr\u01b0\u1edfng, t\u0103ng tr\u01b0\u1edfng, r\u1eebng tr\u1ed3ng T\u1ebfch, kinh doanh r\u1eebng, S\u01a1n La.<\/p>\n

<\/a>BUILDING MODELS OF GROWTH AND INCREMENTAL GROWTH OF Tectona grandis<\/em> Linn. f PLANTATION AT YEN CHAU, SON LA<\/p>\n

Duong Van Doan, Nguyen Cong Hoan<\/p>\n

Thai Nguyen University of Agriculture and Forestry – Thai Nguyen University<\/p>\n

SUMMARY<\/p>\n

In research as well as practice in forestry production, modeling the growth of planted forests over time is always considered an important task, as a basis for determining the main harvesting time. Therefore, it is necessary to build growth models (diameter, height, trunk volume, forest volume, etc. by age) on individual trees and planted forest stands by mathematical equations. This research analyzes and predicts the growth and incremental growth of Tectona grandis<\/em> plantations with standard trees in Yen Chau district, Son La province in order to determine the amount of regular growth and periodic growth according to age as a basis for forecasting of main exploitation age for forest stand. Five growth functions were used to describe the growth process in terms of stem diameter (D1,3<\/sub>), height (Hvn<\/sub>) and volume (V) for research subjects such as: Schumacher, Koller, Korf, Terazaki, and Gompertz, where the selected equation is the one with the parameters that exist in the population and has the maximum coefficient of determination (R2<\/sup>max<\/sub>). Research results showed that growth and incremental growth in stem diameter (D1,3<\/sub>), height (Hvn<\/sub>) and volume (V) are very well described by Schumacher function with R2<\/sup> from 0,994 to 0,998, the growth equations as below: D = 49,261*exp (-3,871\/A**0,450); H = 54,238*exp (-5,011\/A**0,480); V = 2,167*exp (-10,468\/A** 0,529).<\/p>\n

Keywords:<\/em><\/strong> Growth, incremental growth, Tectona grandis<\/em> plantation, forest business, Son La.<\/p>\n

 <\/p>\n

<\/a><\/a>\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG V\u00c0 N\u0102NG SU\u1ea4T
\nC\u1ee6A M\u1ed8T S\u1ed0 D\u00d2NG KEO LAI (acacia hybrid) TR\u1ed2NG TR\u00caN B\u1edc K\u00caNH T\u1ea0I TH\u1ea0NH H\u00d3A – LONG AN<\/p>\n

<\/a>Ph\u00f9ng V\u0103n Khang1<\/sup>, Tr\u1ea7n T\u00edn H\u1eadu2<\/sup>, Tr\u1ea7n Thanh Cao1<\/sup>,
\n\u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i1<\/sup>, Ph\u00f9ng H\u1ed3ng Ph\u00fac2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9
\n2<\/sup>C\u00f4ng ty TNHH Vina Eco Board<\/p>\n

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

C\u00e2y keo lai \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o tr\u1ed3ng r\u1eebng t\u1ea1i t\u1ec9nh Long An mu\u1ed9n h\u01a1n so v\u1edbi c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng kh\u00e1c \u1edf \u0110\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long, do \u0111\u1eb7c \u0111i\u1ec3m th\u1ee7y v\u0103n khi ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u00f9a l\u0169 n\u00ean keo lai ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c tr\u1ed3ng tr\u00ean b\u1edd bao, b\u1edd k\u00eanh v\u00e0 m\u1ed9t s\u1ed1 di\u1ec7n t\u00edch kh\u00f4ng b\u1ecb ng\u1eadp n\u01b0\u1edbc. Nh\u1eb1m \u0111\u01b0a ra nh\u1eefng khuy\u1ebfn c\u00e1o ph\u00f9 h\u1ee3p cho vi\u1ec7c l\u1ef1a ch\u1ecdn c\u00e1c d\u00f2ng keo lai c\u00f3 sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t cao, nghi\u00ean c\u1ee9u n\u00e0y ti\u1ebfn h\u00e0nh tr\u1ed3ng th\u1eed nghi\u1ec7m m\u1ed9t s\u1ed1 d\u00f2ng keo lai \u0111\u00e3 \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn, k\u1ebft h\u1ee3p so s\u00e1nh v\u1edbi gi\u1ed1ng \u0111\u1ea1i tr\u00e0 t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u cho th\u1ea5y, sau 2 n\u0103m tr\u1ed3ng, t\u1ef7 l\u1ec7 s\u1ed1ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a gi\u1eefa \u0111\u1ed1i ch\u1ee9ng v\u00e0 c\u00e1c d\u00f2ng keo c\u00f2n l\u1ea1i, th\u1ea5p nh\u1ea5t \u1edf \u0111\u1ed1i ch\u1ee9ng (81,5%), c\u00e1c d\u00f2ng c\u00f2n l\u1ea1i t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ec1u l\u1edbn h\u01a1n 95%. C\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng D1,3<\/sub>, Hvn<\/sub> ,V v\u00e0 n\u0103ng su\u1ea5t r\u1eebng c\u1ee7a c\u00e1c d\u00f2ng keo lai trong th\u1eed nghi\u1ec7m c\u00f3 s\u1ef1 ph\u00e2n h\u00f3a v\u00e0 chia th\u00e0nh 3 nh\u00f3m ri\u00eang bi\u1ec7t: Th\u1ea5p nh\u1ea5t l\u00e0 \u1edf \u0111\u1ed1i ch\u1ee9ng, k\u1ebf \u0111\u1ebfn l\u00e0 nh\u00f3m g\u1ed3m 4 d\u00f2ng VC01, VC02, VC03, AH1 v\u00e0 cao nh\u1ea5t l\u00e0 d\u00f2ng VC04 v\u00e0 AH7. V\u1edbi nh\u1eefng k\u1ebft qu\u1ea3 tr\u00ean, khi tr\u1ed3ng r\u1eebng keo lai tr\u00ean c\u00e1c di\u1ec7n t\u00edch b\u1edd k\u00eanh, b\u1edd bao ho\u1eb7c tr\u1ed3ng ph\u00e2n t\u00e1n t\u1ea1i Long An v\u00e0 c\u00e1c khu v\u1ef1c c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng t\u1ef1 n\u00ean s\u1eed d\u1ee5ng gi\u1ed1ng AH7 v\u00e0 c\u00e1c gi\u1ed1ng c\u00f3 n\u0103ng su\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng \u0111\u1ec3 n\u00e2ng cao n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/strong>Keo lai, b\u1edd k\u00eanh, sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t r\u1eebng.<\/p>\n

<\/a>GROWTH AND YIELD OF acacia hybrid CLONES ON EMBANKMENT
\nIN LONG AN PROVINCE<\/p>\n

Phung Van Khang1<\/sup>, Tran Tin Hau2<\/sup>, Tran Thanh Cao1<\/sup>, Dang Phuoc Dai1<\/sup>, Phung Hoang Phuc2<\/sup><\/p>\n

1<\/sup>Forest Science Institute of South Viet Nam
\n2<\/sup>Vina Eco Board Company Limited<\/p>\n

SUMMARY<\/p>\n

Acacia hybrid was introduced to plant in Long An province later than other provinces in the Mekong Delta. Due to hydrological characteristics affected by flood season, this species is mainly grown on the embankment, canal banks and some areas is not affected by flood. In order to give appropriate recommendations by choosing of acacia hybrid clones with high growth and yield for plantation, this study conducted a trial of selected acacia hybrids, combined with comparison with mass varieties practising in the local. The results showed that, after 2 years of planting, the survival rate was significantly different between the control and the remaining treatments, the lowest was the control treatment (81.5%) while the remaining clones were all greater than 95%. The growth parameters D1,3<\/sub>, Hvn<\/sub> ,V and yield of the trial clones were significal differences and divided into 3 separate groups: The lowest was in the control, followed by the group of 4 clones: VC01, VC02, VC03, AH1 and the best are the clones of VC04 and AH7. With the above results, planting acacia hybrid on canal banks, embankments or scattered planting in Long An and in the other areas with similar conditions, and it is recommended to use AH7 clone or others which is equivalent growing characterictics to improve productivity and quality.<\/p>\n

Keyword<\/em><\/strong>:<\/em> Acacia hybrid, embankment, canal bank, forest yield<\/p>\n

 <\/p>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A C\u01af\u1edcNG \u0110\u1ed8 V\u00c0 TH\u1edcI GIAN T\u1ec8A TH\u01afA
\nT\u1edaI SINH TR\u01af\u1edeNG V\u00c0 CH\u1ea4T L\u01af\u1ee2NG R\u1eeaNG TR\u1ed2NG KEO LAI
\nT\u1ea0I PH\u00da GI\u00c1O – B\u00ccNH D\u01af\u01a0NG<\/p>\n

<\/a>Nguy\u1ec5n Xu\u00e2n H\u1ea3i, V\u0169 \u0110\u00ecnh H\u01b0\u1edfng, Ki\u1ec1u M\u1ea1nh H\u00e0 v\u00e0 Nguy\u1ec5n V\u0103n \u0110\u0103ng<\/p>\n

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

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

Keo lai l\u00e0 lo\u00e0i sinh tr\u01b0\u1edfng nhanh, ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 t\u1ed1t \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn \u1edf n\u01b0\u1edbc ta. R\u1eebng tr\u1ed3ng keo lai c\u00f3 ti\u1ec1m n\u0103ng chuy\u1ec3n h\u00f3a t\u1eeb r\u1eebng tr\u1ed3ng g\u1ed7 nh\u1ecf sang r\u1eebng tr\u1ed3ng g\u1ed7 l\u1edbn b\u1eb1ng bi\u1ec7n ph\u00e1p t\u1ec9a th\u01b0a, g\u00f3p ph\u1ea7n ph\u00e1t tri\u1ec3n ngu\u1ed3n nguy\u00ean li\u1ec7u ph\u1ee5c v\u1ee5 ch\u1ebf bi\u1ebfn v\u00e0 xu\u1ea5t kh\u1ea9u. Th\u00ed nghi\u1ec7m t\u1ec9a th\u01b0a g\u1ed3m 6 nghi\u1ec7m th\u1ee9c: T1 (kh\u00f4ng t\u1ec9a th\u01b0a, m\u1eadt \u0111\u1ed9 tr\u1ed3ng 1.111 c\u00e2y\/ha), T2 (t\u1ec9a th\u01b0a tu\u1ed5i 2 v\u00e0 5, m\u1eadt \u0111\u1ed9 600 c\u00e2y\/ha), T3 (t\u1ec9a th\u01b0a tu\u1ed5i 2, m\u1eadt \u0111\u1ed9 600 c\u00e2y\/ha), T4 (t\u1ec9a th\u01b0a tu\u1ed5i 2, 3 v\u00e0 5, m\u1eadt \u0111\u1ed9 450 c\u00e2y\/ha), T5 (t\u1ec9a th\u01b0a tu\u1ed5i 3, m\u1eadt \u0111\u1ed9 833 c\u00e2y\/ha) v\u00e0 T6 (t\u1ec9a th\u01b0a tu\u1ed5i 3, m\u1eadt \u0111\u1ed9 600 c\u00e2y\/ha) nh\u1eb1m x\u00e1c \u0111\u1ecbnh c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 th\u1eddi gian t\u1ec9a th\u01b0a th\u00edch h\u1ee3p \u0111\u1ec3 th\u00fac \u0111\u1ea9y sinh tr\u01b0\u1edfng v\u00e0 t\u0103ng gi\u00e1 tr\u1ecb r\u1eebng tr\u1ed3ng keo lai. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u t\u1ea1i th\u1eddi \u0111i\u1ec3m 11,5 n\u0103m tu\u1ed5i cho th\u1ea5y: T\u1ec9a th\u01b0a l\u00e0m t\u0103ng \u0111\u01b0\u1eddng k\u00ednh (D1,3<\/sub>) c\u00e2y c\u00e1 th\u1ec3 t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 ch\u1eb7t. Nghi\u1ec7m th\u1ee9c T4 c\u00f3 D1,3<\/sub> l\u1edbn nh\u1ea5t (24,1 cm), c\u00e1c nghi\u1ec7m th\u1ee9c T2, T3 v\u00e0 T6 c\u00f3 D1,3<\/sub> bi\u1ebfn \u0111\u1ed9ng t\u1eeb 21,8 – 22,7 cm, nghi\u1ec7m th\u1ee9c T5 c\u00f3 D1,3<\/sub> \u0111\u1ea1t 20,5 cm, th\u1ea5p nh\u1ea5t l\u00e0 T1 v\u1edbi D1,3<\/sub> ch\u1ec9 \u0111\u1ea1t 18,1 cm; T\u1ec9a th\u01b0a \u1edf tu\u1ed5i 2 gi\u00fap t\u0103ng tr\u01b0\u1edfng D1,3<\/sub> t\u1ed1t h\u01a1n so v\u1edbi t\u1ec9a th\u01b0a \u1edf tu\u1ed5i 3 khi r\u1eebng tr\u1ed3ng \u1edf 7 tu\u1ed5i. Giai \u0111o\u1ea1n 11,5 tu\u1ed5i t\u1ec9a th\u01b0a \u1edf tu\u1ed5i 3 s\u1ebd th\u00fac \u0111\u1ea9y sinh tr\u01b0\u1edfng D1,3<\/sub> t\u1ed1t nh\u1ea5t. C\u01b0\u1eddng \u0111\u1ed9 t\u1ec9a th\u01b0a c\u00e0ng cao th\u00ec t\u1ef7 l\u1ec7 g\u1ed7 l\u1edbn (D \u2265 18 cm) c\u00e0ng cao. R\u1eebng c\u00f3 t\u1ec9a th\u01b0a \u0111\u1ec1u \u0111\u1ea1t ti\u00eau chu\u1ea9n r\u1eebng tr\u1ed3ng g\u1ed7 l\u1edbn v\u1edbi t\u1ef7 l\u1ec7 g\u1ed7 c\u00f3 D \u2265 15 cm chi\u1ebfm t\u1eeb 73,8% – 84,9% trong khi r\u1eebng kh\u00f4ng t\u1ec9a th\u01b0a 11,5 n\u0103m tu\u1ed5i v\u1eabn ch\u01b0a \u0111\u1ea1t ti\u00eau chu\u1ea9n r\u1eebng tr\u1ed3ng g\u1ed7 l\u1edbn. Do \u0111\u00f3, khi chuy\u1ec3n h\u00f3a r\u1eebng tr\u1ed3ng keo lai g\u1ed7 nh\u1ecf sang g\u1ed7 l\u1edbn n\u00ean t\u1ec9a th\u01b0a khi r\u1eebng 3 tu\u1ed5i, m\u1eadt \u0111\u1ed9 gi\u1eef l\u1ea1i 600 c\u00e2y\/ha v\u1edbi chu k\u1ef3 kinh doanh 12 n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em> Keo lai, t\u1ec9a th\u01b0a, ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng<\/p>\n

<\/a>Effect of thinning time and intensity to the growth and quality of the acacia hybrid plantation<\/strong><\/p>\n

in Phu Giao, Binh Duong<\/strong><\/p>\n

Nguyen Xuan Hai, Vu Dinh Huong, Kieu Manh Ha and Nguyen Van Dang<\/p>\n

Southern Center of Application for Forest Technology and Science<\/p>\n

SUMMARY<\/p>\n

Acacia hybrid is a fast-growing tree species with good quality of wood that is widely planted in Vietnam. Acacia hybrid plantations have potential to be transformed from plantations for wood-chip to saw-log plantations by thinning methods, contributing to the development of raw materials for wood processing and export. A thinning trial has 6 treatments including: T1 (no thinning, planting density 1,111 trees\/ha), T2 (thinned at 2 and 5, 600 trees\/ha), T3 (thinned at 2, 600 trees\/ha), T4 (thinned at aged 2, 3 and 5, 450 trees\/ha), T5 (thinned at aged 3, 833 trees\/ha) and T6 (thinned at aged 3, 600 trees\/ha) to determine the suitable intensity and time of thinning to improve tree growth and to increase the value of acacia hybrid plantations. The research results at 11.5 years of stand age showed that: Thining increased diameter growth of individual trees and proportional to the thining intensity. Treatment T4 had the highest in diaemter (24.1 cm), treatemnets T2, T3 v\u00e0 T6 have D1,3<\/sub> ranged from 21.8 to 22.7 cm, treatment T5 had D1,3<\/sub> reached 20.5 cm, and the lowest diameter of T was 18.1 cm; Thinned at aged 2 years significantly increased D1,3<\/sub> that compared to thinned at age 3 years when 7 year-old plantations thinned at age 3 improved tree diameter when 11.5 year-old plantations.\u00a0The higher thinning intensity leads to the higher the percentage of large saw-log wood (D \u2265 18 cm). Thinned plantations could be met the standards of large saw-log plantations with the proportion of wood with D \u2265 15 cm, accounting for 73.8% – 84.9%, while unthinned plantations of 11.5- year-old still did not get the standards of large timber plantations. Therefore, converting from acacia hybrid plantations are planted for wood chip to large saw-log plantations that should be thinned at age 3- year-old, the remained tree density is about 600 trees\/ha with 12- year-planting rotation.<\/p>\n

Keywords: <\/em><\/strong>Acacia hybrid, thinning, stand quality<\/p>\n

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

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A C\u00c2Y GI\u1eee L\u1ea0I SAU KHAI TH\u00c1C \u0110\u1ebeN SINH TR\u01af\u1edeNG
\nV\u00c0 N\u0102NG SU\u1ea4T R\u1eeaNG TR\u1ed2NG TR\u00c0M L\u00c1 D\u00c0I (M. leucadendra)<\/em>
\nCHU K\u1ef2 2 TR\u00caN \u0110\u1ea4T PH\u00c8N T\u1ea0I HUY\u1ec6N TH\u1ea0NH H\u00d3A, T\u1ec8NH LONG AN<\/p>\n

<\/a>Ng\u00f4 V\u0103n Ng\u1ecdc, Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t, Tr\u1ea7n Kh\u00e1nh Hi\u1ec7u, Tr\u1ea7n V\u0103n Nho<\/p>\n

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

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

Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e2y gi\u1eef l\u1ea1i sau khai th\u00e1c \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i chu k\u1ef3 2 tr\u00ean v\u00f9ng \u0111\u1ea5t ph\u00e8n, t\u1ea1i huy\u1ec7n Th\u1ea1nh H\u00f3a, t\u1ec9nh Long An l\u00e0 m\u1ed9t ph\u1ea7n k\u1ebft qu\u1ea3 c\u1ee7a \u0111\u1ec1 t\u00e0i c\u1ea5p c\u01a1 s\u1edf \u201cNghi\u00ean c\u1ee9u ho\u00e0n thi\u1ec7n quy tr\u00ecnh k\u1ef9 thu\u1eadt tr\u1ed3ng, t\u1ec9a th\u01b0a Tr\u00e0m \u00fac cung c\u1ea5p g\u1ed7 x\u1ebb t\u1ea1i huy\u1ec7n Th\u1ea1nh H\u00f3a, t\u1ec9nh Long An\u201d, th\u1ef1c hi\u1ec7n giai \u0111o\u1ea1n t\u1eeb 2020 \u0111\u1ebfn 2025. Nghi\u00ean c\u1ee9u \u0111\u00e3 k\u1ebf th\u1eeba m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i 6 n\u0103m tu\u1ed5i, khi khai th\u00e1c b\u1ed1 tr\u00ed gi\u1eef l\u1ea1i c\u00e2y chu k\u1ef3 1 v\u1edbi 4 c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m (M0: khai th\u00e1c tr\u1eafng; M1: gi\u1eef l\u1ea1i 100 c\u00e2y\/ha; M2: gi\u1eef l\u1ea1i 200 c\u00e2y\/ha v\u00e0 M3: gi\u1eef l\u1ea1i 300 c\u00e2y\/ha), di\u1ec7n t\u00edch m\u1ed7i m\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m l\u00e0 1.500 m2 <\/sup>v\u1edbi 3 l\u1ea7n l\u1eb7p l\u1ea1i. Tr\u00ean di\u1ec7n t\u00edch c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh ti\u1ebfp t\u1ee5c tr\u1ed3ng l\u1ea1i Tr\u00e0m l\u00e1 d\u00e0i chu k\u1ef3 2 v\u1edbi c\u1ef1 ly tr\u1ed3ng 1 \u00b4 1 m. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c thu th\u1eadp s\u1ed1 li\u1ec7u sinh tr\u01b0\u1edfng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p b\u1ed1 tr\u00ed \u00f4 \u0111\u1ecbnh v\u1ecb (100 m2<\/sup>\/\u00f4) v\u1edbi 4 c\u00f4ng th\u1ee9c (CT0: kh\u00f4ng gi\u1eef l\u1ea1i c\u00e2y tr\u1ed3ng chu k\u1ef3 1; CT1: gi\u1eef l\u1ea1i 100 c\u00e2y\/ha; CT2: gi\u1eef l\u1ea1i 200 c\u00e2y\/ha v\u00e0 CT3: gi\u1eef l\u1ea1i 300 c\u00e2y\/ha) v\u00e0 3 l\u1ea7n l\u1eb7p l\u1ea1i. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u sau 02 n\u0103m tu\u1ed5i cho th\u1ea5y, v\u1ec1 sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i chu k\u1ef3 2 c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau \u0111\u01b0\u1eddng k\u00ednh (D1,3<\/sub>) chi\u1ec1u cao (Hvn<\/sub>) v\u00e0 tr\u1eef l\u01b0\u1ee3ng sau 2 n\u0103m tu\u1ed5i c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a th\u1ed1ng k\u00ea (P > 0,05). T\u1ed5ng tr\u1eef l\u01b0\u1ee3ng c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh sau 2 n\u0103m tu\u1ed5i CT0: 37,4 m3<\/sup>\/ha; CT1: 42,7 m3<\/sup>\/ha; CT2: 49,0 m3<\/sup>\/ha v\u00e0 CT3: 50,7 m3<\/sup>\/ha. M\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng khi khai th\u00e1c gi\u1eef l\u1ea1i 200 c\u00e2y\/ha v\u00e0 300 c\u00e2y\/ha l\u00e0 02 m\u00f4 h\u00ecnh c\u00f3 tri\u1ec3n v\u1ecdng cho tr\u1ed3ng r\u1eebng kinh doanh r\u1eebng tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i tr\u00ean \u0111\u1ea5t ph\u00e8n t\u1ea1i t\u1ec9nh Long An.<\/p>\n

T\u1eeb kh\u00f3a: <\/strong>Tr\u00e0m l\u00e1 d\u00e0i, sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t, \u0111\u1ea5t ph\u00e8n, t\u1ec9nh Long An<\/p>\n

<\/a>Study on the effects of keeping trees after harvesting to the growth <\/strong>
\nof Melaleuca lecadendra<\/em> plantations in the second cycle on Acid sulphate soil in thanh hoa district, Long An province<\/strong><\/p>\n

Ngo Van Ngoc, Kieu Tuan Dat, Tran Khanh Hieu, Tran Van Nho<\/p>\n

Forest Science Institute of South Viet Nam<\/p>\n

SUMMARY<\/p>\n

Studying the effects of trees retained after harvesting on growth and productivity of the second-rotation Melaleuca plantations on acid sulphate soils, in Thanh Hoa district, Long An province is a part of the results of the study \u201cResearch to complete the technical process of planting and thinning M. leucadendra<\/em> provides sawn timber in Thanh Hoa district, Long An province\u201d. Conducted from 2020 to 2025. The study has inherited the model of 6-year-old Melaleuca plantations. When harvesting, the tree is retained in cycle 1 with 4 experimental formulas (M0: Clear harvesting – control); M1: retain 100 trees\/ha; M2: retain 200 treets\/ha and M3: retain 300 trees\/ha), the area of each experimental model is 1,500 m2<\/sup> with 3 replicates. On the area of the models, continue to set-up new planting of Melaleuca leucadendra with spare 1 mx1 m. The experiment was collected growth data by the method of positioning plots (100 m2<\/sup>\/plot) with 4 formulas (CT0: No keep trees in fist rotation; CT1: retain 100 trees\/ha; CT2: retain 200 trees\/ha and CT3: retain 300 trees\/ha) with 3 replicates. Research results after two years showed that: Regarding the growth of Melaleuca leucadendra<\/em> plantations in the second rotation, there are parameters of diameter (D1<\/sub>.3<\/sub>), height (Hvn<\/sub>) and reserve after 2 years of age of the formulas. There was no statistically significant difference (P > 0.05). Total yield of models after 2 years of age CT0: 37.4 m3<\/sup>\/ha; CT1: 42.7 m3<\/sup>\/ha; CT2: 49.0 m3<\/sup>\/ha and CT3: 50.7 m3<\/sup>\/ha. The model of afforestation, when exploiting and keeping 200 trees\/ha and 300 trees\/ha, are two promising models for commercial plantation of Melaleuca leucadendra<\/em> on acid sulphate soil, Long An province.<\/p>\n

Keywords<\/em><\/strong>:<\/em> Melaleuca leucadendra<\/em>, growth, productivity, acid sulphate soil, Long An province<\/p>\n

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

<\/a>\u1ed4 SINH TH\u00c1I V\u00c0 M\u1ed0I QUAN H\u1ec6
\nC\u1ee6A C\u00c1C LO\u00c0I C\u00c2Y TRONG R\u1eeaNG L\u00c1 R\u1ed8NG TH\u01af\u1edcNG XANH
\n\u1ede KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN V\u0102N H\u00d3A \u0110\u1ed2NG NAI<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n Qu\u00fd1<\/sup>, V\u0169 M\u1ea1nh1<\/sup>, Nguy\u1ec5n V\u0103n H\u1ee3p2<\/sup>, Nguy\u1ec5n V\u0103n L\u00e2m2<\/sup>,
\nNguy\u1ec5n V\u0103n Th\u00e0nh3<\/sup>, L\u00ea V\u0103n C\u01b0\u1eddng2<\/sup>, Nguy\u1ec5n H\u1ed3ng H\u1ea3i4<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nhi\u1ec7t \u0111\u1edbi Vi\u1ec7t – Nga, Chi nh\u00e1nh Ph\u00eda Nam
\n2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p – Ph\u00e2n hi\u1ec7u \u0110\u1ed3ng Nai
\n3<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n4<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n

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

S\u1ef1 chung s\u1ed1ng c\u1ee7a c\u00e1c lo\u00e0i l\u00e0 ch\u1ee7 \u0111\u1ec1 tr\u1ecdng t\u00e2m trong sinh th\u00e1i h\u1ecdc. Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m \u1ed5 sinh th\u00e1i v\u00e0 m\u1ed1i quan h\u1ec7 c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y c\u00f3 th\u1ec3 ph\u1ea3n \u00e1nh m\u1ed9t c\u00e1ch kh\u00e1ch quan s\u1ef1 ph\u00e2n b\u1ed1 v\u00e0 m\u1ee9c \u0111\u1ed9 th\u00edch \u1ee9ng c\u1ee7a c\u00e1c lo\u00e0i v\u1edbi m\u00f4i tr\u01b0\u1eddng, \u0111\u1ed3ng th\u1eddi ti\u1ebft l\u1ed9 c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c qu\u1ea7n th\u1ec3 v\u00e0 c\u01a1 ch\u1ebf duy tr\u00ec t\u00ednh \u0111a d\u1ea1ng trong qu\u1ea7n x\u00e3. \u1ede nghi\u00ean c\u1ee9u n\u00e0y, \u0111\u1eb7c \u0111i\u1ec3m \u1ed5 sinh th\u00e1i v\u00e0 m\u1ed1i quan h\u1ec7 c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 \u01b0u th\u1ebf v\u00e0 \u0111\u1ed3ng \u01b0u th\u1ebf trong ki\u1ec3u r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh \u1edf Khu b\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean V\u0103n h\u00f3a \u0110\u1ed3ng Nai, t\u1ec9nh \u0110\u1ed3ng Nai \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch \u0111\u1ecbnh l\u01b0\u1ee3ng. V\u00e0o cu\u1ed1i n\u0103m 2022, m\u1ed9t \u00f4 nghi\u00ean c\u1ee9u r\u1ed9ng 4 ha \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp trong ph\u00e2n khu b\u1ea3o v\u1ec7 nghi\u00eam ng\u1eb7t c\u1ee7a Khu b\u1ea3o t\u1ed3n, ph\u1ee5c v\u1ee5 cho vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u. T\u1ea5t c\u1ea3 c\u00e1c c\u00e2y g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c (dbh) \u2265 5 cm \u0111\u01b0\u1ee3c \u0111\u1ecbnh danh v\u00e0 \u0111o dbh. K\u1ebft qu\u1ea3 cho th\u1ea5y, 5 trong s\u1ed1 11 lo\u00e0i c\u00e2y thu\u1ed9c nh\u00f3m lo\u00e0i \u01b0u th\u1ebf c\u1ee7a l\u00e2m ph\u1ea7n l\u00e0 th\u1ef1c s\u1ef1 c\u00f3 \u00fd ngh\u0129a v\u1ec1 m\u1eb7t sinh th\u00e1i t\u1ea1i th\u1eddi \u0111i\u1ec3m nghi\u00ean c\u1ee9u. S\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng, \u0111\u1ed9 r\u1ed9ng v\u00e0 m\u1ee9c \u0111\u1ed9 ch\u1ed3ng ch\u00e9o \u1ed5 sinh th\u00e1i c\u1ee7a c\u00e1c lo\u00e0i \u01b0u th\u1ebf v\u00e0 \u0111\u1ed3ng \u01b0u th\u1ebf ch\u1ec9 ra r\u1eb1ng, h\u1ea7u h\u1ebft ch\u00fang l\u00e0 c\u00e1c lo\u00e0i chuy\u00ean bi\u1ec7t, c\u00f3 y\u00eau c\u1ea7u v\u1ec1 m\u00f4i tr\u01b0\u1eddng s\u1ed1ng kh\u00e1c nhau. Ph\u00e2n t\u00edch m\u1ed1i quan h\u1ec7 t\u1ed5ng th\u1ec3 c\u1ee7a c\u00e1c lo\u00e0i cho th\u1ea5y, l\u00e2m ph\u1ea7n \u1edf tr\u1ea1ng th\u00e1i t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh v\u1edbi t\u1ef7 l\u1ec7 ph\u01b0\u01a1ng sai VR =1,31. Trong s\u1ed1 55 c\u1eb7p c\u1ee7a 11 lo\u00e0i c\u00e2y \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch, 5 c\u1eb7p lo\u00e0i v\u01b0\u1ee3t qua c\u1ea3 ba lo\u1ea1i ki\u1ec3m \u0111\u1ecbnh Chi b\u00ecnh ph\u01b0\u01a1ng, h\u1ec7 s\u1ed1 li\u00ean k\u1ebft AC v\u00e0 t\u01b0\u01a1ng quan Pearson; c\u1ee5 th\u1ec3, 2 c\u1eb7p c\u00f3 m\u1ed1i quan h\u1ec7 c\u1ea1nh tranh v\u00e0 3 c\u1eb7p c\u00f3 m\u1ed1i quan h\u1ec7 t\u1ea1o thu\u1eadn l\u1ee3i. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u1ed5 sinh th\u00e1i v\u00e0 m\u1ed1i quan h\u1ec7 c\u1ee7a c\u00e1c lo\u00e0i trong nghi\u00ean c\u1ee9u n\u00e0y c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c ch\u00fa \u00fd khi l\u1eadp k\u1ebf ho\u1ea1ch qu\u1ea3n l\u00fd r\u1eebng v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ph\u1ee5c h\u1ed3i th\u1ea3m th\u1ef1c v\u1eadt \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Chi b\u00ecnh ph\u01b0\u01a1ng, l\u00fd thuy\u1ebft \u1ed5 sinh th\u00e1i, r\u1eebng nhi\u1ec7t \u0111\u1edbi, sinh th\u00e1i qu\u1ea7n x\u00e3, t\u01b0\u01a1ng t\u00e1c lo\u00e0i<\/p>\n

<\/a>NICHE AND INTERSPECIFIC ASSOCIATION OF TREE SPECIES IN AN EVERGREEN BROADLEAVED FOREST IN DONG NAI CULTURE AND NATURE RESERVE<\/p>\n

Nguyen Van Quy1<\/sup>, Vu Manh1<\/sup>, Nguyen Van Hop2<\/sup>, Nguyen Van Lam2<\/sup>, Nguyen Van Thanh3<\/sup>, Le Van Cuong2<\/sup>, Nguyen Hong Hai4<\/sup><\/p>\n

1<\/sup>Southern Branch of Joint Vietnam-Russia Tropical Science and Technology Research Center
\n2<\/sup>Vietnam National University of Forestry – Southern Campus
\n3<\/sup>Vietnamese Academy of Forest Sciences
\n4<\/sup>Vietnam National University of Forestry<\/p>\n

The coexistence of species is a fundamental aspect of community ecology, and understanding niche characteristics and interspecific associations provides valuable insights into species distribution patterns, environmental adaptation, community structure, and mechanisms that sustain diversity. This study aims to conduct a quantitative analysis of niches and interspecific associations among dominant and co-dominant tree species in an evergreen broadleaved forest located within the Dong Nai Culture and Nature Reserve. In 2022, a 4 ha study plot was established in the strictly protected zone of the reserve for data collection. The study identified and measured woody trees with a diameter at breast height of \u2265 5 cm. The results of this study highlight the ecological significance of five out of the eleven dominant species. The analysis of ecological similarity, niche breadth, and niche overlap among the dominant and co-dominant species showed that many of them are specialized species with distinct habitat requirements. Furthermore, the analysis of overall interspecific associations indicated the relative stability of the stand, as evidenced by a variance ratio of 1.31. Out of the 55 pairs of analyzed dominant and co-dominant tree species, five pairs exhibited statistically significant associations across all three indices: the Chi-square test, association coefficient, and Pearson correlation coefficient. Specifically, two pairs showed negative associations, while three pairs displayed positive associations. Understanding the variations in niches and interspecific associations, as delineated by the present study, is paramount for effective forest management planning and the development of ecological restoration strategies in the study area. These insights provide essential guidance for preserving the delicate balance of the ecosystem, ensuring sustainable coexistence, and promoting plant diversity conservation efforts.<\/p>\n

Keywords:<\/em><\/strong> Chi-square, niche theory, tropical forest, community ecology, interspecific interaction<\/p>\n

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

\u00a0<\/strong><\/a>C\u1ea4U TR\u00daC V\u00c0 SINH KH\u1ed0I R\u1eeaNG T\u1ef0 NHI\u00caN
\nT\u1ea0I HUY\u1ec6N BA CH\u1ebc, T\u1ec8NH QU\u1ea2NG NINH<\/p>\n

<\/a>Tr\u1ea7n V\u0103n \u0110\u00f41<\/sup>, Nguy\u1ec5n To\u00e0n Th\u1eafng1<\/sup>, V\u0169 Ti\u1ebfn L\u00e2m1<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh1<\/sup>,
\nHo\u00e0ng Thanh S\u01a1n1<\/sup>, Nguy\u1ec5n Tr\u1ecdng Minh2<\/sup>, Tr\u1ea7n Anh H\u1ea3i1<\/sup>, D\u01b0\u01a1ng Quang Trung1<\/sup>,
\nNguy\u1ec5n V\u0103n Tu\u1ea5n1<\/sup>, Nguy\u1ec5n Huy Ho\u00e0ng1<\/sup>, Ph\u1ea1m Ti\u1ebfn D\u0169ng1<\/sup>,
\n\u0110\u00e0o Trung \u0110\u1ee9c1<\/sup>, Tr\u01b0\u01a1ng Tr\u1ecdng Kh\u00f4i1<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n<\/sup>2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n

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

Theo k\u1ebft qu\u1ea3 di\u1ec5n bi\u1ebfn r\u1eebng, huy\u1ec7n Ba Ch\u1ebd, t\u1ec9nh Qu\u1ea3ng Ninh c\u00f3 kho\u1ea3ng 12.383 ha r\u1eebng t\u1ef1 nhi\u00ean thu\u1ed9c 4 ch\u1ee7 qu\u1ea3n l\u00fd ch\u00ednh l\u00e0 H\u1ed9 gia \u0111\u00ecnh, c\u00e1 nh\u00e2n trong n\u01b0\u1edbc (HG\u0110), C\u1ed9ng \u0111\u1ed3ng d\u00e2n c\u01b0 (C\u0110DC), \u1ee6y ban nh\u00e2n d\u00e2n c\u1ea5p x\u00e3 (UBND), Ban qu\u1ea3n l\u00fd r\u1eebng ph\u00f2ng h\u1ed9 (BQLRPH). \u0110\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c th\u1ef1c tr\u1ea1ng t\u00e0i nguy\u00ean r\u1eebng t\u1ea1i 4 nh\u00f3m ch\u1ee7 qu\u1ea3n l\u00fd n\u00e0y s\u1ebd g\u00f3p ph\u1ea7n v\u00e0o c\u00f4ng t\u00e1c b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n t\u00e0i nguy\u00ean r\u1eebng t\u1ea1i Ba Ch\u1ebd. Ph\u01b0\u01a1ng ph\u00e1p \u00f4 ti\u00eau chu\u1ea9n (1.000 m2<\/sup>; 33,3 \u00b4 30,0 m) ng\u1eabu nhi\u00ean t\u1ea1m th\u1eddi \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 thu th\u1eadp s\u1ed1 li\u1ec7u hi\u1ec7n tr\u01b0\u1eddng. K\u1ebft qu\u1ea3 cho th\u1ea5y, c\u00e1c ch\u1ec9 s\u1ed1 l\u00e2m ph\u1ea7n v\u1ec1 s\u1ed1 c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c (D1,3<\/sub>), ti\u1ebft di\u1ec7n ngang, tr\u1eef l\u01b0\u1ee3ng c\u00e2y \u0111\u1ee9ng v\u00e0 sinh kh\u1ed1i kh\u00f4 tr\u00ean m\u1eb7t \u0111\u1ea5t (AGB) \u0111\u1ec1u c\u00f3 s\u1ef1 kh\u00e1c nhau r\u00f5 r\u00e0ng gi\u1eefa 4 \u0111\u1ed1i t\u01b0\u1ee3ng. R\u1eebng thu\u1ed9c UBND (63 c\u00e2y\/1.000 m2<\/sup>) c\u00f3 s\u1ed1 c\u00e2y nhi\u1ec1u nh\u1ea5t v\u00e0 \u00edt nh\u1ea5t t\u1ea1i r\u1eebng thu\u1ed9c C\u0110DC (46 c\u00e2y\/1.000 m2<\/sup>). R\u1eebng thu\u1ed9c C\u0110DC (15,36 cm) c\u00f3 D1,3<\/sub> l\u1edbn nh\u1ea5t v\u00e0 nh\u1ecf nh\u1ea5t t\u1ea1i r\u1eebng thu\u1ed9c UBND (12,76 cm). R\u1eebng thu\u1ed9c BQLRPH c\u00f3 tr\u1eef l\u01b0\u1ee3ng c\u00e2y \u0111\u1ee9ng l\u1edbn nh\u1ea5t (6,04 m3<\/sup>\/1.000 m2<\/sup>) v\u00e0 nh\u1ecf nh\u1ea5t t\u1ea1i r\u1eebng thu\u1ed9c C\u0110DC (4,88 m3<\/sup>\/1.000 m2<\/sup>). R\u1eebng thu\u1ed9c BQLRPH c\u00f3 AGB l\u1edbn nh\u1ea5t (6,15 t\u1ea5n\/1.000 m2<\/sup>) v\u00e0 nh\u1ecf nh\u1ea5t t\u1ea1i r\u1eebng thu\u1ed9c C\u0110DC (4,96 t\u1ea5n\/1.000 m2<\/sup>). Ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng gi\u1eefa \u0111ai cao < 200 m v\u00e0 \u2265 200 m so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n t\u1ea1i m\u1ed7i nh\u00f3m ch\u1ee7 qu\u1ea3n l\u00fd c\u0169ng c\u00f3 s\u1ef1 kh\u00e1c nhau. Ph\u00e2n b\u1ed1 N\/D l\u00e2m ph\u1ea7n t\u1ea1i 4 nh\u00f3m ch\u1ee7 qu\u1ea3n l\u00fd v\u00e0 2 \u0111ai cao \u0111\u1ec1u c\u00f3 d\u1ea1ng ph\u00e2n b\u1ed1 gi\u1ea3m. C\u00e1ch th\u1ee9c v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd r\u1eebng b\u1edfi m\u1ed7i nh\u00f3m ch\u1ee7 qu\u1ea3n l\u00fd l\u00e0 t\u00e1c \u0111\u1ed9ng ch\u00ednh d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00e1c nhau v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m ph\u1ea7n r\u1eebng t\u1ea1i Ba Ch\u1ebd. T\u1eeb th\u1ef1c t\u1ebf \u0111\u00f3 c\u1ea7n t\u0103ng c\u01b0\u1eddng c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd, c\u00e1ch th\u1ee9c b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean r\u1eebng nh\u01b0 \u0111\u1ed1i v\u1edbi r\u1eebng c\u1ed9ng \u0111\u1ed3ng \u0111\u1ec3 r\u1eebng ph\u00e1t huy t\u1ed1t h\u01a1n ch\u1ee9c n\u0103ng, vai tr\u00f2 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i, g\u00f3p ph\u1ea7n x\u00f3a \u0111\u00f3i gi\u1ea3m ngh\u00e8o t\u1ea1i Ba Ch\u1ebd.<\/p>\n

T\u1eeb kh\u00f3a<\/em><\/strong>:<\/em> Ch\u1ee7 qu\u1ea3n l\u00fd, \u0111ai cao, \u0111\u1eb7c tr\u01b0ng l\u00e2m ph\u1ea7n, sinh kh\u1ed1i, tr\u1eef l\u01b0\u1ee3ng c\u00e2y \u0111\u1ee9ng<\/p>\n

<\/a>STRUCTURE AND ABOVEGROUND BIOMASS OF NATURAL FORESTS
\nIN BA CHE DISTRICT, QUANG NINH PROVINCE<\/p>\n

Tran Van Do1<\/sup>, Nguyen Toan Thang1<\/sup>, Vu Tien Lam1<\/sup>, Hoang Van Thanh1<\/sup>, Hoang Thanh Son1<\/sup>,
\nNguyen Trong Minh2<\/sup>, Tran Anh Hai1<\/sup>, Duong Quang Trung1<\/sup>, Nguyen Van Tuan1<\/sup>, Nguyen Huy Hoang1<\/sup>,
\nPham Tien Dung1<\/sup>, Dao Trung Duc1<\/sup>, Truong Trong Khoi1<\/sup><\/p>\n

[1]Silvicultural Research Insititute
\n2 <\/sup>Vietnam National University of Forestry<\/p>\n

SUMMARY<\/p>\n

Ba Che district belonging to Quang Ninh Province had 12,383 ha of natural forest area, which was managed by four main owners including including Individuals and householders (TH), Local community (LC), People\u2019s committee at communal level (PC) and Protection forest management board (PFMB). Understudying current status of natural forests of these four owners will contribute to sustainable forest development and management in Ba Che district. Random sampling plots of 1,000 m2<\/sup> each (33.3 \u00b4 30 m) were used to collect field data. The results indicated that all stand parameters including tree number, diameter at breast height (D1,3<\/sub>), basal area, standing volume, and aboveground biomass (AGB) were significantly different among four owners. PC forest had highest tree number of 63 trees\/1,000 m2<\/sup> and the lowest (46 trees\/1,000 m2<\/sup>) belonged to LC forests. LC forest had the largest D1,3<\/sub> of 15.36 cm and it was smallest in PC forest (12.76 cm). PFMB forest had highest standing volume of 6.04 m3<\/sup>\/1,000 m2<\/sup> and AGB of 6.15 tons\/1,000 m2<\/sup>, the lowest belonged to PC forest with standing volume of 4.88 m3<\/sup>\/1,000 m2<\/sup> and AGB of 4.96 tons\/1,000 m2<\/sup>. Stand parameters between < 200 m elevation zone and \u2265 200 m elevation zone were also different in each of four owners. Diameter and stem number distributions in four owners and two elevation zones had exponential shape by reducing tree number in higher D1,3<\/sub> classes. Management approaches applied by each owner played a central role on the differences of stand parameters in Ba Che district. It is recommended that applying forest management approaches practiced by local communities will enhance the development of forest, contributing to poverty reduction, environment protection, and reducing the impact of climate change in Ba Che district.<\/p>\n

Keywords<\/em><\/strong>: Forest owner, elevation zone, stand parameter, aboveground biomass, standing volume<\/p>\n

 <\/p>\n

<\/a>TH\u1ef0C TR\u1ea0NG V\u00c0 \u0110I\u1ec0U KI\u1ec6N L\u1eacP \u0110\u1ecaA G\u00c2Y TR\u1ed2NG
\nM\u1eaeM TR\u1eaeNG (Avicennia alba<\/em> Blume) \u1ede V\u00d9NG VEN BI\u1ec2N T\u00c2Y NAM B\u1ed8<\/p>\n

<\/a>L\u00ea V\u0103n Th\u00e0nh1<\/sup>, H\u00e0 \u0110\u00ecnh Long1<\/sup>, Ph\u1ea1m Ng\u1ecdc Th\u00e0nh1<\/sup>, T\u1ea1 V\u0103n H\u00e2n1<\/sup>, \u0110o\u00e0n Thanh T\u00f9ng1<\/sup>, Tr\u01b0\u01a1ng Quang Tr\u00ed1<\/sup>, Nguy\u1ec5n Xu\u00e2n \u0110\u00e0i1<\/sup>, H\u00e0 V\u0103n N\u0103m1<\/sup>, Nguy\u1ec5n \u00dat Nh\u1ecf2<\/sup><\/p>\n

[1]Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng
\n2Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p T\u00e2y Nam B\u1ed9<\/p>\n

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

R\u1eebng ng\u1eadp m\u1eb7n c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong ph\u00f2ng ch\u1ed1ng thi\u00ean tai, b\u1ea3o v\u1ec7 b\u1edd bi\u1ec3n, l\u00e0 b\u1ec3 ch\u1ee9a carbon, h\u1ea1n ch\u1ebf t\u00e1c h\u1ea1i c\u1ee7a bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu. T\u1ea1i v\u00f9ng ven bi\u1ec3n T\u00e2y Nam B\u1ed9, M\u1eafm tr\u1eafng l\u00e0 m\u1ed9t trong nh\u1eefng lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng ch\u00ednh. Hi\u1ec7n nay, M\u1eafm tr\u1eafng \u0111\u01b0\u1ee3c tr\u1ed3ng nhi\u1ec1u nh\u1ea5t \u1edf t\u1ec9nh Tr\u00e0 Vinh (3.003,74 ha), \u00edt nh\u1ea5t \u1edf t\u1ec9nh Ti\u1ec1n Giang (62,0 ha). M\u1eafm tr\u1eafng sau 15 n\u0103m tr\u1ed3ng \u1edf x\u00e3 V\u0129nh H\u1ea3i, th\u1ecb x\u00e3 V\u0129nh Ch\u00e2u, t\u1ec9nh S\u00f3c Tr\u0103ng v\u00e0 \u1edf x\u00e3 T\u00e2n \u00c2n, huy\u1ec7n Ng\u1ecdc Hi\u1ec3n; x\u00e3 Nguy\u1ec5n Vi\u1ec7t Kh\u00e1i, huy\u1ec7n Ph\u00fa T\u00e2n, t\u1ec9nh C\u00e0 Mau cho sinh tr\u01b0\u1edfng nhanh, \u0111\u00e1p \u1ee9ng m\u1ee5c ti\u00eau ph\u00f2ng h\u1ed9 t\u1ed1t nh\u1ea5t. \u0110i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba g\u00e2y tr\u1ed3ng M\u1eafm tr\u1eafng t\u1eeb thu\u1eadn l\u1ee3i \u0111\u1ebfn kh\u00f3 kh\u0103n. \u0110\u1ea5t n\u01a1i tr\u1ed3ng M\u1eafm tr\u1eafng hi\u1ec7n nay \u00edt chua; M\u1eafm tr\u1eafng c\u00f3 th\u1ec3 tr\u1ed3ng v\u00e0 cho sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n t\u1ed1t tr\u00ean \u0111\u1ea5t c\u00f3 h\u00e0m l\u01b0\u1ee3ng m\u00f9n t\u1ed5ng s\u1ed1 t\u1eeb r\u1ea5t ngh\u00e8o \u0111\u1ebfn gi\u00e0u, h\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m t\u1ed5ng s\u1ed1 t\u1eeb m\u1ee9c ngh\u00e8o \u0111\u1ebfn gi\u00e0u, h\u00e0m l\u01b0\u1ee3ng l\u00e2n t\u1ed5ng s\u1ed1 v\u00e0 kali t\u1ed5ng s\u1ed1 \u1edf m\u1ee9c gi\u00e0u, \u0111\u1ea5t c\u00f3 \u0111\u1ed9 m\u1eb7n nhi\u1ec1u \u0111\u1ebfn m\u1eb7n mu\u1ed1i; \u0111\u1ed9 th\u00e0nh th\u1ee5c c\u1ee7a \u0111\u1ea5t t\u1eeb b\u00f9n ch\u1eb7t \u0111\u1ebfn \u0111\u1ea5t c\u00e1t pha, nh\u01b0ng t\u1ed1t nh\u1ea5t l\u00e0 tr\u1ed3ng tr\u00ean \u0111\u1ea5t b\u00f9n c\u1ee9ng \u0111\u1ebfn s\u00e9t c\u1ee9ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> M\u1eafm tr\u1eafng, c\u00e2y ng\u1eadp m\u1eb7n, \u0111i\u1ec1u ki\u1ec7n g\u00e2y tr\u1ed3ng, sinh tr\u01b0\u1edfng<\/p>\n

\u00a0<\/em><\/p>\n

STATUS AND SITE CONDITIONS FOR PLANTING Avicennia <\/em>a<\/em>lba<\/em> Blume
\nIN THE SOUTHWEST COASTAL REGION<\/p>\n

Le Van Thanh1<\/sup>, Ha Dinh Long1<\/sup>, Pham Ngoc Thanh1<\/sup>, Ta Van Han1<\/sup>, Doan Thanh Tung1<\/sup>,
\nTruong Quang Tri1<\/sup>, Nguyen Xuan Dai1<\/sup>, Ha Van Nam1<\/sup>, Nguyen Ut Nho2<\/sup><\/p>\n

1<\/sup>Research Institute for Forest Ecology and Environment
\n2<\/sup>South Western forest Research and Experimental Center<\/p>\n

Summary<\/p>\n

Mangrove forests play an important role in disaster prevention, coastal protection and act as carbon storages mitigating the impacts of climate change. In the Southwest coastal region, Avicennia alba<\/em> is one of the main mangrove species being planted. Currently, Avicennia alba<\/em> is mostly grown in Tra Vinh province (3,003.74 ha) and the least in Tien Giang province (62.0 ha). After 15 years of plantation in Vinh Hai commune, Vinh Chau town, Soc Trang province and Tan An commune, Ngoc Hien district, Nguyen Viet Khai commune, Phu Tan district, Ca Mau province, Avicennia alba<\/em> grows quickly and meets the best protection target. The conditions for establishing Avicennia alba<\/em> plantations vary from favorable to difficult. The soil for planting Avicennia alba<\/em> is currently less acidic; it can be grown and well-developed on soils with total organic matter content from very poor to rich, total nitrogen content from poor to rich, total phosphorus and potassium content at rich levels, and salinity levels ranging from high to very high. The soil texture ranges from clay to sandy loam, but the best soil for planting is hard silt to hard clay.<\/p>\n

Keywords:<\/em><\/strong> Avicennia alba<\/em> Blume, mangroves, planting conditions, growth<\/p>\n

\u00a0<\/em><\/p>\n

<\/a>K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U PH\u00d2NG CH\u1ed0NG S\u00c2U \u0102N L\u00c1 B\u1ed2 \u0110\u1ec0 (Syntypistis <\/em>sp.) \u1ede PH\u00da TH\u1ecc<\/p>\n

<\/a>B\u00f9i Quang Ti\u1ebfp, Tr\u1ea7n Thanh Tr\u0103ng<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng<\/p>\n

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

Nghi\u00ean c\u1ee9u ph\u00f2ng ch\u1ed1ng S\u00e2u \u0103n l\u00e1 b\u1ed3 \u0111\u1ec1 (Syntypistis <\/em>sp.) \u1edf giai \u0111o\u1ea1n s\u00e2u non tu\u1ed5i 2 – 4 trong \u0111i\u1ec1u ki\u1ec7n nh\u00e0 l\u01b0\u1edbi (nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh t = 27,8 – 29,7o<\/sup>C, \u0111\u1ed9 \u1ea9m trung b\u00ecnh RH = 65,9 – 77,3%) \u0111\u01b0\u1ee3c th\u00ed nghi\u1ec7m v\u1edbi 3 lo\u1ea1i ch\u1ebf ph\u1ea9m vi sinh v\u1eadt g\u1ed3m: Beauveria <\/em>spp. 1 \u00b4 107<\/sup> b\u00e0o t\u1eed\/g (Be); Metarhizium <\/em>spp. 1 \u00b4 107<\/sup> b\u00e0o t\u1eed\/g (Me); h\u1ed7n h\u1ee3p Beauveria <\/em>sp. 1 \u00b4 106<\/sup> b\u00e0o t\u1eed\/g + Metarhizium <\/em>sp. 1 x 106<\/sup> b\u00e0o t\u1eed\/g + Bacillus thuringiensis<\/em> 1 \u00b4 108<\/sup> CFU\/g (BeMeBt) v\u00e0 3 lo\u1ea1i ho\u1ea1t ch\u1ea5t h\u00f3a h\u1ecdc g\u1ed3m: Dimethoate+ Cypemethrin (DC); Profenfos (Pr); Spirotetramat (Sp). K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y kh\u1ea3 n\u0103ng ti\u00eau di\u1ec7t S\u00e2u \u0103n l\u00e1 b\u1ed3 \u0111\u1ec1 c\u1ee7a c\u00e1c ch\u1ebf ph\u1ea9m vi sinh v\u1eadt c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t (p <\/em>< 0,001). Sau 14 ng\u00e0y phun, ch\u1ebf ph\u1ea9m BeMeBt c\u00f3 hi\u1ec7u qu\u1ea3 cao nh\u1ea5t 90,23%, theo sau l\u00e0 Be v\u00e0 Me \u1edf m\u1ee9c l\u1ea7n l\u01b0\u1ee3t l\u00e0 83,40% v\u00e0 80,98%. Bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng b\u1eb1ng ho\u1ea1t ch\u1ea5t h\u00f3a h\u1ecdc cho t\u1ef7 l\u1ec7 s\u00e2u ch\u1ebft \u0111\u1ea1t 100% sau 4 ng\u00e0y phun DC v\u00e0 sau 5 ng\u00e0y phun Sp v\u00e0 Pr. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m n\u00e0y l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c th\u00ed nghi\u1ec7m ph\u00f2ng ch\u1ed1ng S\u00e2u \u0103n l\u00e1 b\u1ed3 \u0111\u1ec1 ngo\u00e0i hi\u1ec7n tr\u01b0\u1eddng.<\/p>\n

T\u1eeb kh\u00f3a<\/em><\/strong>: Ch\u1ebf ph\u1ea9m vi sinh: Bacillus thuringiensis<\/em>, Beauveria <\/em>spp., Metarhizium <\/em>spp.,<\/em> ho\u1ea1t ch\u1ea5t h\u00f3a h\u1ecdc: Dimethoate+ Cypemethrin, Profenfos, Spirotetramat, s\u00e2u \u0103n l\u00e1 b\u1ed3 \u0111\u1ec1<\/p>\n

<\/a>Reseacch on the control of Syntypistis <\/em>sp. leaf eating Styrax tonkinensis<\/em> <\/strong>
\nin Phu Tho Province<\/strong><\/p>\n

Bui Quang Tiep, Tran Thanh Trang<\/p>\n

Forest Protection Research Center<\/p>\n

summary<\/p>\n

Research on the control of Syntypistis <\/em>sp.<\/em> a leaf eating Styrax tonkinensis<\/em> at the 2nd<\/sup> – <\/sub>4th<\/sup> larvae under the net house condition (average temperature was 27.8- 29.7o<\/sup>C, average humidity was 65.9 – 77.3%) was conducted with three types of microbial products: Beauveria <\/em>spp. 1 \u00b4 107<\/sup> spores\/g (Be); Metarhizium <\/em>spp. 1 \u00b4 107<\/sup> spores\/g (Me); the mixed microbial products of Beauveria<\/em> sp. 1 \u00b4 106 <\/sup>spores\/g + Metarhizium <\/em>sp. 1 \u00b4 106<\/sup> spores\/g + Bacillus thuringiensis<\/em> 1 \u00b4 108<\/sup> CFU\/g (BeMeBt) and three types of chemical ingredients: Dimethoate+ Cypemethrin (DC); Profenfos (Pr); Spirotetramat (Sp). After 14 days of spraying, the results showed that the ability of killing Syntypistis <\/em>sp. of microbial products were significantly different (p <\/em>< 0,001). The mixed microbial products of BeMeBt had the highest efficiency in killing Syntypistis <\/em>sp. at 90.23%, followed by Be and Me at 83.40% and 80.98%, respectively. The chemical experiment rusulted in 100% death rate of Syntypistis <\/em>sp. after 4 days of spraying DC and after 5 days of spraying Sp and Pr. The results of this experiment are the scientific basis for conducting field experiments to control Syntypistis <\/em>sp.<\/em><\/p>\n

Keywords<\/em><\/strong>: <\/em><\/strong>Myrobial products: Bacillus thuringiensis, Beauveria <\/em>spp., Metarhizium <\/em>spp.; Chemical ingredients: Dimethoate + Cypemethrin, Profenfos, Spirotetramat; Syntypistis <\/em>sp.<\/p>\n


\n<\/strong> <\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A TH\u1edcI GIAN V\u00c0 NHI\u1ec6T \u0110\u1ed8 S\u1ea4Y
\nC\u1ee6A QU\u00c1 TR\u00ccNH S\u1ea4Y \u0110\u00d3NG R\u1eaeN KEO \u0110\u1ebeN T\u00cdNH CH\u1ea4T C\u01a0 H\u1eccC,
\nV\u1eacT L\u00dd C\u1ee6A S\u1ea2N PH\u1ea8M TRE \u00c9P KH\u1ed0I<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, Nguy\u1ec5n Thanh T\u00f9ng, Nguy\u1ec5n V\u0103n \u0110\u1ecbnh, T\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/p>\n

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

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

S\u1ea5y \u0111\u00f3ng r\u1eafn keo l\u00e0 b\u01b0\u1edbc c\u00f4ng ngh\u1ec7 cu\u1ed1i c\u00f9ng trong quy tr\u00ecnh c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t tre \u00e9p kh\u1ed1i. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng b\u01b0\u1edbc c\u00f4ng ngh\u1ec7 quan tr\u1ecdng nh\u1ea5t v\u00e0 c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ea7u h\u1ebft c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, v\u1eadt l\u00fd c\u1ee7a s\u1ea3n ph\u1ea9n tre \u00e9p kh\u1ed1i. B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a th\u1eddi gian v\u00e0 nhi\u1ec7t \u0111\u1ed9 s\u1ea5y \u0111\u00f3ng r\u1eafn keo c\u1ee7a khu\u00f4n tre \u00e9p kh\u1ed1i sau khi \u0111\u01b0\u1ee3c \u00e9p ngu\u1ed9i s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb s\u1ea5y tre \u00e9p kh\u1ed1i b\u0103ng chuy\u1ec1n CFGH-3000 v\u1edbi 3 c\u1ea5p th\u1eddi gian (10h, 11h, v\u00e0 12h) v\u00e0 3 d\u1ea3i nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau tr\u00ean 6 v\u00f9ng c\u1ee7a b\u0103ng chuy\u1ec1n s\u1ea5y \u0111\u1ebfn m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, v\u1eadt l\u00fd c\u1ee7a s\u1ea3n ph\u1ea9n tre \u00e9p kh\u1ed1i. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 ra ch\u1ebf \u0111\u1ed9 s\u1ea5y v\u1edbi th\u00f4ng s\u1ed1 c\u00f4ng ngh\u1ec7 s\u1ea5y: th\u1eddi gian s\u1ea5y l\u00e0 11h, nhi\u1ec7t \u0111\u1ed9 s\u1ea5y \u1edf c\u00e1c v\u00f9ng s\u1ea5y, v\u00f9ng 1: 3 m \u0111\u1ea7u nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng, v\u00f9ng 2: 3 m ti\u1ebfp nhi\u1ec7t \u0111\u1ed9 80 – 110o<\/sup>C, v\u00f9ng 3: 3 m ti\u1ebfp nhi\u1ec7t \u0111\u1ed9 110 – 120o<\/sup>C, v\u00f9ng 4: 21 m ti\u1ebfp nhi\u1ec7t \u0111\u1ed9 120 – 130o<\/sup>C, v\u00f9ng 5: 10 m ti\u1ebfp nhi\u1ec7t \u0111\u1ed9 130 – 80o<\/sup>C, v\u00f9ng 6: 5 m c\u00f2n l\u1ea1i nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng cho s\u1ea3n ph\u1ea9n tre \u00e9p kh\u1ed1i \u0111\u1ea1t ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t nh\u1ea5t v\u1edbi \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh (MOR): 149,38 MPa, m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i khi u\u1ed7n t\u0129nh (MOE): 18,256.82 MPa, \u0111\u1ed9 b\u1ec1n tr\u01b0\u1ee3t d\u1ecdc: 14,21 MPa, \u0111\u1ed9 b\u1ec1n n\u00e9n d\u1ecdc: 100,25 MPa, \u0111\u1ed9 tr\u01b0\u01a1ng n\u1edf chi\u1ec1u d\u00e0y (TS): 1,45%<\/p>\n

T\u1eeb kh\u00f3a<\/em>:<\/strong> Tre \u00e9p kh\u1ed1i, s\u1ea5y \u0111\u00f3ng r\u1eafn keo, nhi\u1ec7t \u0111\u1ed9 s\u1ea5y, th\u1eddi gian s\u1ea5y<\/p>\n

<\/a>EFFECTS OF DURATION AND TEMPERATURE OF THE HEATING PROCESS
\nFOR RESIN CURING ON SEVERAL MECHANICAL AND PHYSICAL PROPERTIES
\nOF BAMBOO SCRIMBER<\/p>\n

Nguyen Thi Phuong, Nguyen Thanh Tung, Nguyen Van Dinh, Ta Thi Thanh Huong<\/p>\n

Research Institute of Forest Industry<\/p>\n

summary<\/p>\n

The heating process for resin curing is the final stage of the technology procedure for manufacturing bamboo scrimber. This stage is one of the most important stages of the manufacture of bamboo scrimber and has effects on almost all mechanical and physical properties of bamboo scrimber. This article demonstrated the research results of the effects of the duration and temperature during the heating process for resin curing of bamboo scrimber after cold pressing using the curing channel CFGH – 3000. Three levels of duration (10h, 11h, 12h) and three different ranges of temperature in the six zones of the curing channel were applied for resin curing. The results indicated that the duration and temperature of the heating process: duration of 11h, temperature at different zones; zone 1: first 3 m room temperature, zone 2: next 3 m 80 – 110o<\/sup>C, zone 3: next 3 m 110 – 120o<\/sup>C, zone 4: next 21 m 120 – 130o<\/sup>C, zone 5: next 10 m 130 – 80o<\/sup>C, zone 6: the final 5 m room temperature created the bamboo scrimber with the best performance: modulus of rupture (MOR) of 149.38 MPa, modulus of elastic (MOE) of 18,256.82 MPa, tensile parallel to grain of 14.21 MPa, compression parallel to grain of 100.25 MPa, thickness swelling (TS) of 1.45%<\/p>\n

Keywords:<\/em><\/strong> Bamboo scrimber, resin curing, heating duration, heating temperature<\/p>\n

 <\/p>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A TH\u00d4NG S\u1ed0 CH\u1ebe \u0110\u1ed8 \u00c9P \u0110\u1ebeN M\u1ed8T S\u1ed0 T\u00cdNH CH\u1ea4T V\u1eacT L\u00dd V\u00c0 C\u01a0 H\u1eccC C\u1ee6A V\u00c1N D\u00c1N S\u1eec D\u1ee4NG KEO D\u1ea6U V\u1ece H\u1ea0T \u0110I\u1ec0U<\/p>\n

Nguy\u1ec5n Th\u1ecb Tr\u1ecbnh, Nguy\u1ec5n Th\u1ecb H\u1eb1ng, Nguy\u1ec5n B\u1ea3o Ng\u1ecdc<\/p>\n

\u00a0<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n

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

B\u00e0i vi\u1ebft tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 th\u1eddi gian \u00e9p v\u00e1n \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u01a1 v\u1eadt l\u00fd ch\u1ee7 y\u1ebfu c\u1ee7a v\u00e1n d\u00e1n g\u1ed7 Keo tai t\u01b0\u1ee3ng s\u1eed d\u1ee5ng keo d\u00e1n g\u1ed7 t\u1eeb d\u1ea7u v\u1ecf h\u1ea1t \u0111i\u1ec1u. V\u00e1n d\u00e1n \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb v\u00e1n b\u00f3c g\u1ed7 Keo tai t\u01b0\u1ee3ng v\u00e0 keo d\u1ea7u v\u1ecf h\u1ea1t \u0111i\u1ec1u v\u1edbi l\u01b0\u1ee3ng keo tr\u00e1ng 120 g\/m2<\/sup>. Th\u00f4ng s\u1ed1 ch\u1ebf \u0111\u1ed9 \u00e9p g\u1ed3m 3 c\u1ea5p nhi\u1ec7t \u0111\u1ed9 \u00e9p: 110o<\/sup>C, 120o<\/sup>C, 125o<\/sup>C v\u00e0 3 c\u1ea5p th\u1eddi gian \u00e9p: 13,15, 17 ph\u00fat. \u00c1p su\u1ea5t \u00e9p c\u1ed1 \u0111\u1ecbnh l\u00e0 1,1 MPa. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3 v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a v\u00e1n \u1edf c\u00e1c ch\u1ebf \u0111\u1ed9 \u00e9p v\u00e1n kh\u00e1c nhau. \u0110\u1ed9 tr\u01b0\u01a1ng n\u1edf chi\u1ec1u d\u00e0y, \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh (MOR); m\u00f4\u0111un \u0111\u00e0n h\u1ed3i khi u\u1ed1n t\u0129nh (MOE) v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng d\u00e1n d\u00ednh c\u00f3 s\u1ef1 kh\u00e1c nhau r\u00f5 r\u1ec7t gi\u1eefa c\u00e1c ch\u1ebf \u0111\u1ed9 \u00e9p t\u1ea1o v\u00e1n. T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd \u0111\u1ea1t gi\u00e1 tr\u1ecb t\u1ed1t nh\u1ea5t \u1edf ch\u1ebf \u0111\u1ed9 \u00e9p: Nhi\u1ec7t \u0111\u1ed9 \u00e9p 125o<\/sup>C; th\u1eddi gian \u00e9p: 15 ph\u00fat; \u00e1p su\u1ea5t \u00e9p: 1,1 MPa. T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd c\u1ee7a v\u00e1n d\u00e1n \u1edf ch\u1ebf \u0111\u1ed9 \u00e9p n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u00e1n d\u00e1n \u0111\u1ed1i ch\u1ee9ng s\u1eed d\u1ee5ng keo UF thu\u1ed9c s\u1eed d\u1ee5ng lo\u1ea1i 3 (v\u00e1n d\u00e1n s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n \u0111\u1ed9 \u1ea9m cao\/ngo\u00e0i tr\u1eddi), v\u00e1n \u0111\u1ea1t ti\u00eau chu\u1ea9n theo ASTM D3043-17 v\u00e0 TCVN 8328-2.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo d\u1ea7u v\u1ecf h\u1ea1t \u0111i\u1ec1u, v\u00e1n d\u00e1n, keo d\u00e1n g\u1ed7, t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd<\/p>\n

<\/a>THE EFFECT OF THE PRESSING PARAMETERS\u00a0ON PHYSICAL AND MECHANICAL PROPERTIES OF PLYWOOD USING CASHEW NUTSHELL OIL ADHESIVE AS A GOOD GLUE<\/p>\n

Nguyen Thi Trinh, Nguyen Thi Hang, Nguyen Bao Ngoc<\/p>\n

Research Institute of Forest Industry, Vietnamese Academy of Forest Sciences<\/p>\n

SUMMARY<\/p>\n

This article presents the results of a study on the effects of the pressing temperatures and times on the main physical and mechanical properties of Acacia mangium<\/em> plywood using cashew nutshell oil glue as a binder. The plywood was made of Acacia mangium <\/em>peeled veneers and cashew nut shell oil glue with a glue spread rate of 120 g\/m2<\/sup>. The pressing temperatures of 110o<\/sup>C, 120o<\/sup>C and 125o<\/sup>C, and the pressing times of 13, 15 and 17 minutes were used in the experiments. The pressure of 1.1 MPa was consistent for all the experiments. Results showed that there was an insignificant difference in the densities of the plywood samples, while thickness swelling, MOR, MOE and bonding quality had a significant difference between the pressing parameters. The mechanical and physical properties of the plywood was best at the following parameters: the pressing temperature: 125o<\/sup>C; the pressing time: 15 minutes; the pressure: 1.1 MPa. The properties of the plywood were similar to the controlled plywood using UF adhesive of class 3 (plywood used in high humidity\/exterior conditions), the plywood met the requirements of the standard ASTM D3043-17 and TCVN 8328-2.<\/p>\n

Keywords:<\/em><\/strong> Cashew nutshell oil adhesive, plywood, adhesive, mechanical and physical properties<\/p>\n

 <\/p>\n

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

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

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 5 – 2023 1. Th\u1ef1c tr\u1ea1ng ngu\u1ed3n t\u00e0i nguy\u00ean c\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm \u1edf m\u1ed9t s\u1ed1 \u0111\u1ea3o v\u00f9ng Nam B\u1ed9, Vi\u1ec7t Nam Status of rare medical plant resources in some Southern Islands of Vietnam \u0110\u1eb7ng V\u0103n S\u01a1n Nguy\u1ec5n Qu\u1ed1c B\u1ea3o Tr\u01b0\u01a1ng B\u00e1 V\u01b0\u01a1ng Ph\u1ea1m Qu\u1ed1c Tr\u1ecdng H\u1ed3 […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[24,45],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2486"}],"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=2486"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2486\/revisions"}],"predecessor-version":[{"id":2489,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2486\/revisions\/2489"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}