{"id":1618,"date":"2019-06-18T11:25:01","date_gmt":"2019-06-18T04:25:01","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1618"},"modified":"2023-11-23T12:25:29","modified_gmt":"2023-11-23T05:25:29","slug":"vietnam-journal-of-forest-science-number-1-2019","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2019\/06\/vietnam-journal-of-forest-science-number-1-2019\/","title":{"rendered":"Vietnam Journal of Forest Science Number 1-2019"},"content":{"rendered":"

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

<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 1<\/strong> – <\/strong>201<\/strong>9<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nNghi\u00ean c\u1ee9u \u0111a d\u1ea1ng c\u00e2y thu\u1ed1c\u00a0 thu\u1ed9c ng\u00e0nh M\u1ed9c lan (Magnoliophyta)\u00a0 t\u1ea1i v\u01b0\u1eddn qu\u1ed1c gia Phia O\u1eafc – Phia \u0110\u00e9n, t\u1ec9nh Cao B\u1eb1ng<\/td>\nStudy on diversity of medicinal plants of Magnoliophyta in Phia Oac – Phia Den National Park, Cao Bang province<\/td>\nTr\u1ea7n V\u0103n H\u1ea3i
\n\u0110\u1ed7 V\u0103n H\u00e0i
\nTr\u1ea7n Th\u1ebf B\u00e1ch<\/td>\n		5<\/td>\n<\/tr>\n
2.<\/td>\nC\u00e1c lo\u00e0i th\u1ef1c v\u1eadt b\u1ecb \u0111e d\u1ecda tuy\u1ec7t ch\u1ee7ng thu\u1ed9c\u00a0 ng\u00e0nh h\u1ea1t k\u00edn (Angiospermae) v\u00e0 gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng c\u1ee7a ch\u00fang \u1edf v\u01b0\u1eddn qu\u1ed1c gia phia O\u1eafc – Phia \u0110\u00e9n, t\u1ec9nh Cao B\u1eb1ng<\/td>\nThreatened species of the angiosperms and their use in Phia Oac – Phia Den National Park, Cao Bang province, Viet Nam<\/td>\nTr\u1ea7n V\u0103n H\u1ea3i
\nTr\u1ea7n Th\u1ebf B\u00e1ch
\n\u0110\u1ed7 V\u0103n H\u00e0i<\/td>\n		13<\/td>\n<\/tr>\n
3.<\/td>\nKhu v\u1ef1c ph\u00e2n b\u1ed1 v\u00e0 ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt\u00a0 c\u1ee7a T\u01a1m tr\u01a1ng (Urceola minutiflora<\/em> (Pierre) d.j.Middleton) \u1edf T\u00e2y Nguy\u00ean<\/td>\nDistribution area and vegetation type of Urceola minutiflora<\/em> (Pierre) D.J.Middleton) in the Central Highland<\/td>\nNguy\u1ec5n Thanh Nguy\u00ean
\nPh\u00f3 \u0110\u1ee9c \u0110\u1ec9nh
\nHo\u00e0ng Thanh Tr\u01b0\u1eddng
\nL\u01b0u Th\u1ebf Trung
\nNguy\u1ec5n Qu\u1ed1c Huy
\nNg\u00f4 B\u1ea3o Uy\u00ean
\nB\u00f9i Xu\u00e2n Ti\u1ebfn<\/td>\n		19<\/td>\n<\/tr>\n
4.<\/td>\nNghi\u00ean c\u1ee9u t\u00e1i sinh\u00a0 c\u00e2y b\u1ea1ch \u0111\u00e0n lai up (E. <\/em>urophylla<\/em> x E. pellita<\/em>)\u00a0 th\u00f4ng qua ph\u00f4i soma ph\u1ee5c v\u1ee5 cho chuy\u1ec3n gen<\/td>\nStudy of background reproductive plants through soma for gene transfer<\/td>\nNguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e0
\nNguy\u1ec5n Th\u1ecb Huy\u1ec1n
\nL\u00ea Th\u1ecb Th\u1ee7y
\nTr\u1ea7n Th\u1ecb Thu H\u00e0
\nL\u00ea S\u01a1n
\nTr\u1ea7n \u0110\u1ee9c V\u01b0\u1ee3ng
\nNguy\u1ec5n H\u1eefu S\u1ef9
\nNguy\u1ec5n \u0110\u1ee9c Ki\u00ean
\n\u0110\u00e0o Th\u1ecb Thu\u1ef3 Trang
\nPh\u00f9ng Th\u1ecb Kim Hu\u1ec7<\/td>\n		27<\/td>\n<\/tr>\n
5.<\/td>\nNghi\u00ean c\u1ee9u chuy\u1ec3n gen EcHB1\u00a0 l\u00e0m t\u0103ng chi\u1ec1u d\u00e0i s\u1ee3i g\u1ed7 cho d\u00f2ng b\u1ea1ch \u0111\u00e0n lai up th\u00f4ng qua Agrobacterium tumefaciens<\/em><\/td>\nIntrodution of the EcHB1 gene into E. urophylla <\/em>x E. pellita<\/em> hybrid via Agrobacterium tumefaciens<\/em><\/td>\nTr\u1ea7n Th\u1ecb Thu H\u00e0
\nL\u00ea Th\u1ecb Th\u1ee7y
\nNguy\u1ec5n Th\u1ecb Huy\u1ec1n
\nNguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e0
\nTr\u1ea7n \u0110\u1ee9c V\u01b0\u1ee3ng
\nL\u00ea S\u01a1n
\nNguy\u1ec5n \u0110\u1ee9c Ki\u00ean
\nNguy\u1ec5n H\u1eefu S\u1ef9
\nT\u00f4 Nh\u1eadt Minh
\n\u0110\u00e0o Th\u1ecb Thu\u1ef3 Trang
\nPh\u00f9ng Th\u1ecb Kim Hu\u1ec7<\/td>\n		37<\/td>\n<\/tr>\n
6.<\/td>\nT\u0103ng tr\u01b0\u1edfng sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t\u00a0 c\u1ee7a r\u1eebng th\u1ee9 sinh l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh\u00a0 t\u1ea1i Kon H\u00e0 N\u1eebng, Gia Lai<\/td>\nBelowground biomass increment of secondary evergreen broadleaf forests in Kon Ha Nung, Gia Lai province<\/td>\nTr\u1ea7n Ho\u00e0ng Qu\u00fd
\nNinh Vi\u1ec7t Kh\u01b0\u01a1ng
\nTr\u1ea7n Cao Nguy\u00ean<\/td>\n		48<\/td>\n<\/tr>\n
7.<\/td>\nM\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc\u00a0 lo\u00e0i M\u1ea1y ch\u00e2u (Carya tonkinensis\u00a0<\/em>Lecomte)\u00a0 \u1edf tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i\u00a0 t\u1ea1i th\u00e0nh ph\u1ed1 S\u01a1n La, t\u1ec9nh S\u01a1n La<\/td>\nSilvicultural characteristics of Carya tonkinensis<\/em> Lecomte in secondary forests in Son La city, Son La province<\/td>\nV\u0169 V\u0103n Thu\u1eadn; L\u00f2 Th\u1ecb H\u1ed3ng Xoan; Tr\u1ea7n Anh Tu\u1ea5n<\/td>\n60<\/td>\n<\/tr>\n
8.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a bi\u1ec7n ph\u00e1p x\u1eed l\u00fd th\u1ef1c b\u00ec\u00a0 \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng m\u1ed9t s\u1ed1 lo\u00e0i keo\u00a0 \u1edf Qu\u1ea3ng Ninh<\/td>\nEffects of vegetation treatment methods on the growth of various acacia species plantation forests in Quang Ninh province<\/td>\nNguy\u1ec5n Huy S\u01a1n
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nV\u0169 Ti\u1ebfn L\u00e2m
\nH\u1ed3 Trung L\u01b0\u01a1ng<\/td>\n		72<\/td>\n<\/tr>\n
9.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a m\u1eadt \u0111\u1ed9 \u0111\u1ebfn sinh tr\u01b0\u1edfng\u00a0 c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i keo 2 n\u0103m tu\u1ed5i tr\u1ed3ng\u00a0 \u1edf U\u00f4ng B\u00ed – Qu\u1ea3ng Ninh<\/td>\nThe effects of planting density to the growth of some acacia species 2 year old in quang ninh province<\/td>\nV\u0169 Ti\u1ebfn L\u00e2m
\nH\u1ed3 Trung L\u01b0\u01a1ng
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nNguy\u1ec5n Huy S\u01a1n
\nCao V\u0103n L\u1ea1ng<\/td>\n		80<\/td>\n<\/tr>\n
10.<\/td>\nThi\u1ebft l\u1eadp \u0111\u1ed3ng th\u1eddi h\u1ec7 th\u1ed1ng m\u00f4 h\u00ecnh \u0111\u1ec3\u00a0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 tin c\u1eady trong \u01b0\u1edbc t\u00ednh sinh kh\u1ed1i – carbon c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn c\u00e2y B\u1eddi l\u1eddi \u0111\u1ecf (Machilus odoratissimus<\/em> Nees) \u1edf T\u00e2y Nguy\u00ean<\/td>\nDeveloping simultaneously modeling systems for improving reliability of tree aboveground biomass – carbon and its components estimates for Machilus odoratissimus<\/em> Nees in the Central Highlands of
\nViet Nam<\/td>\n		Tri\u1ec7u Th\u1ecb L\u1eafng
\nB\u1ea3o Huy<\/td>\n		88<\/td>\n<\/tr>\n
11.<\/td>\nNghi\u00ean c\u1ee9u thi\u1ebft l\u1eadp b\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 r\u1eebng ng\u1eadp m\u1eb7n t\u1ea1i Vi\u1ec7t Nam s\u1eed d\u1ee5ng \u1ea3nh landsat 8 OLI v\u00e0 Sentinel 1 \u0111a th\u1eddi gian tr\u00ean n\u1ec1n t\u1ea3ng \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y c\u1ee7a google earth engine<\/td>\nReserch to establis mangrove forests map in viet nam using time series landsat 8 OLI and Sentinel 1 in google earth engine cloud computing platform<\/td>\nPh\u1ea1m V\u0103n Du\u1ea9n
\nL\u00ea S\u1ef9 Doanh
\nV\u0169 Th\u1ecb Th\u00ecn
\nHo\u00e0ng V\u0103n Khi\u00ean
\nPh\u1ea1m Th\u1ecb Qu\u1ef3nh<\/td>\n		100<\/td>\n<\/tr>\n
12.<\/td>\n\u0110\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 kinh t\u1ebf m\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00f4m t\u1ea1i v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung B\u1ed9<\/td>\nEconomic efficiency assessment from some\u00a0Trom (Sterculia foetida<\/em>\u00a0L.) plantation\u00a0experiment models in the dry zone at South of Central Viet Nam<\/td>\nPh\u00f9ng V\u0103n Khang
\nNg\u00f4 V\u0103n Ng\u1ecdc
\nPh\u00f9ng V\u0103n Khen
\nV\u00f5 Trung Ki\u00ean
\nPh\u00f9ng V\u0103n T\u1ec9nh
\nNguy\u1ec5n Tr\u1ecdng Nam<\/td>\n		111<\/td>\n<\/tr>\n
13.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m 3 lo\u00e0i tre\u00a0 l\u00e0m nguy\u00ean li\u1ec7u cho s\u1ea3n xu\u1ea5t tre \u00e9p kh\u1ed1i<\/td>\nThe properties of 3 bamboo species using as raw material for pressed bamboo products<\/td>\nNguy\u1ec5n Quang Trung
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nNguy\u1ec5n Th\u1ecb Mi\u1ec1n<\/td>\n		119<\/td>\n<\/tr>\n
14.<\/td>\n\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7 c\u00e2y B\u1eddi l\u1eddi v\u00e0ng (Litsea pierrei<\/em> Lecomte)<\/td>\nAssessment of the possibility in wood utilization of Litsea pierrei<\/em> Lecomte<\/td>\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nNguy\u1ec5n T\u1eed Kim
\nB\u00f9i H\u1eefu Th\u01b0\u1edfng
\nNguy\u1ec5n Th\u1ecb Tr\u1ecbnh
\nNguy\u1ec5n Tr\u1ecdng Ngh\u0129a<\/td>\n		125<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110A D\u1ea0NG C\u00c2Y THU\u1ed0C THU\u1ed8C NG\u00c0NH M\u1ed8C LAN (Magnoliophyta) T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA PHIA O\u1eaeC – PHIA \u0110\u00c9N, T\u1ec8NH CAO B\u1eb0NG<\/p>\n

<\/a>Tr\u1ea7n V\u0103n H\u1ea3i1,3<\/sup>, \u0110\u1ed7 V\u0103n H\u00e0i2,3<\/sup>, Tr\u1ea7n Th\u1ebf B\u00e1ch*2,3<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u v\u00e0 Chuy\u1ec3n giao c\u00f4ng ngh\u1ec7
\n2<\/sup>Vi\u1ec7n Sinh th\u00e1i v\u00e0 T\u00e0i nguy\u00ean sinh v\u1eadt
\n3<\/sup>H\u1ecdc vi\u1ec7n Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7
\n– Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Th\u1ef1c v\u1eadt l\u00e0m thu\u1ed1c ng\u00e0nh M\u1ed9c lan (Magnoliophyta) \u1edf V\u01b0\u1eddn Qu\u1ed1c gia Phia O\u1eafc – Phia \u0110\u00e9n g\u1ed3m c\u00f3 2 l\u1edbp, 143 h\u1ecd, 465 chi, 741 lo\u00e0i. L\u1edbp M\u1ed9c lan (Magnoliopsida) bao g\u1ed3m 119 h\u1ecd, 391 chi, 621 lo\u00e0i (83,81% c\u00e2y d\u01b0\u1ee3c li\u1ec7u); l\u1edbp H\u00e0nh (Liliopsida) bao g\u1ed3m 24 h\u1ecd, 74 chi, 120 lo\u00e0i (16,19% c\u00e2y thu\u1ed1c). H\u1ecd c\u00f3 s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u l\u1edbn nh\u1ea5t l\u00e0 Asteraceae (56 lo\u00e0i, 7,56% t\u1ed5ng s\u1ed1 c\u00e2y c\u00f3 hoa). Chi Ficus g\u1ed3m 15 lo\u00e0i (2,02% t\u1ed5ng s\u1ed1 c\u00e2y d\u01b0\u1ee3c li\u1ec7u). 63 lo\u00e0i \u0111\u01b0\u1ee3c ghi trong S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam (ph\u1ea7n 2. Th\u1ef1c v\u1eadt. 2007); 3 lo\u00e0i trong t\u00ecnh tr\u1ea1ng r\u1ea5t nguy c\u1ea5p (CR), 21 lo\u00e0i trong t\u00ecnh tr\u1ea1ng nguy c\u1ea5p (EN) v\u00e0 39 lo\u00e0i trong t\u00ecnh tr\u1ea1ng s\u1ebd nguy c\u1ea5p (VU).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110a d\u1ea1ng c\u00e2y thu\u1ed1c, th\u1ef1c v\u1eadt c\u00f3 hoa, V\u01b0\u1eddn Qu\u1ed1c gia Phia O\u1eafc – Phia \u0110\u00e9n<\/td>\n<\/tr>\n

\n

<\/a>Study on diversity of medicinal plants of Magnoliophyta in Phia Oac – Phia Den National Park, Cao Bang province<\/strong><\/p>\n

There are 2 classes, 143 families, 465 genera, 741 medicinal species of Magnoliophyta are distributed in the Phia Oac – Phia Den National Park. Magnoliopsida comprises 119 families, 391 genera, 621 species (83.81% medicinal flowering plants); Liliopsida comprises 24 families, 74 genera, 120 species (16.19% total medicinal flowering plants). The family comprises the maximum number of medicinal flowering species is Asteraceae (56 species, 7.56% total medicinal flowering plants). The genus Ficus <\/em>comprises 15 species (2.02% total medicinal flowering plants). 63 species are recorded in Vietnam Red Data Book (part 2. Plants. 2007); 3 species in critically endangered situation (CR), 21 species in endangered situation (EN) and 39 species in vulnerable situation (VU).<\/p>\n

Keywords:<\/em><\/strong> Diversity of medicinal plant, flowering plants, Phia Oac – Phia Den National Park<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>C\u00c1C LO\u00c0I TH\u1ef0C V\u1eacT B\u1eca \u0110E D\u1eccA TUY\u1ec6T CH\u1ee6NG THU\u1ed8C
\nNG\u00c0NH H\u1ea0T K\u00cdN (Angiospermae) V\u00c0 GI\u00c1 TR\u1eca S\u1eec D\u1ee4NG C\u1ee6A CH\u00daNG \u1ede V\u01af\u1edcN QU\u1ed0C GIA PHIA O\u1eaeC – PHIA \u0110\u00c9N, T\u1ec8NH CAO B\u1eb0NG<\/p>\n

<\/a>Tr\u1ea7n V\u0103n H\u1ea3i1<\/sup>, Tr\u1ea7n Th\u1ebf B\u00e1ch2<\/sup>, \u0110\u1ed7 V\u0103n H\u00e0i2<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u v\u00e0 Chuy\u1ec3n giao c\u00f4ng ngh\u1ec7 – Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n2<\/sup>Vi\u1ec7n Sinh th\u00e1i v\u00e0 T\u00e0i nguy\u00ean Sinh v\u1eadt – Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt c\u00f3 nguy c\u01a1 b\u1ecb tuy\u1ec7t ch\u1ee7ng \u1edf V\u01b0\u1eddn Qu\u1ed1c gia Phia O\u1eafc – Phia \u0110\u00e9n, t\u1ec9nh Cao B\u1eb1ng \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 78 lo\u00e0i thu\u1ed9c 34 h\u1ecd v\u00e0 60 chi th\u1ef1c v\u1eadt c\u1ea7n \u01b0u ti\u00ean b\u1ea3o t\u1ed3n. Theo S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam 2007 th\u00ec c\u00f3 61 lo\u00e0i (c\u1ea5p r\u1ea5t nguy c\u1ea5p CR c\u00f3 03 lo\u00e0i, c\u1ea5p \u0111\u1ed9 nguy c\u1ea5p EN c\u00f3 21 lo\u00e0i v\u00e0 s\u1ed1 lo\u00e0i s\u1ebd nguy c\u1ea5p l\u00e0 37 lo\u00e0i). Theo Ngh\u1ecb \u0111\u1ecbnh 32\/2006\/N\u0110-CP ghi nh\u1eadn 20 lo\u00e0i trong \u0111\u00f3 c\u00f3 04 lo\u00e0i thu\u1ed9c nh\u00f3m IA, 16 lo\u00e0i thu\u1ed9c nh\u00f3m IIA. V\u1edbi Danh l\u1ee5c \u0111\u1ecf IUCN ghi nh\u1eadn 16 lo\u00e0i (02 lo\u00e0i r\u1ea5t nguy c\u1ea5p, 02 lo\u00e0i nguy c\u1ea5p, 12 lo\u00e0i s\u1ebd nguy c\u1ea5p). V\u1ec1 gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng c\u1ee7a nh\u00f3m c\u00e2y c\u00f3 nguy c\u01a1 b\u1ecb tuy\u1ec7t ch\u1ee7ng c\u00f3 04 nh\u00f3m gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng ch\u00ednh l\u00e0 nh\u00f3m c\u00e2y l\u00e0m thu\u1ed1c (32 lo\u00e0i), nh\u00f3m c\u00e2y cho g\u1ed7 (15 lo\u00e0i), nh\u00f3m c\u00e2y l\u00e0m c\u1ea3nh (10 lo\u00e0i) v\u00e0 nh\u00f3m c\u00e2y d\u00f9ng l\u00e0m rau \u0103n (3 lo\u00e0i).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Th\u1ef1c v\u1eadt b\u1ecb \u0111e d\u1ecda, Th\u1ef1c v\u1eadt \u1edf V\u01b0\u1eddn Qu\u1ed1c gia Phia O\u1eafc – Phia \u0110\u00e9n<\/td>\n<\/tr>\n

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<\/a>Threatened species of the angiosperms and their use in Phia Oac – Phia Den National Park, Cao Bang province, Viet Nam<\/strong><\/p>\n

The study is an outcome of the surveys conducted to assess the status of threatened species in the Phia Oac – Phia Den National Park, Cao Bang province. 78 species belonging to 60 genera and 34 families were identified. Out of these, 61 species have been listed in the Red Data Book of Viet Nam (2007), 20 species in the Government Decree 32\/2006\/N\u0110-CP (2006) and 16 species listed in the IUCN Red List (2015). The number of useful plant species found in Phia Oac – Phia Den National Park is also categorized as follows: 32 medicinal plant species, 15 timber yielding species, 10 ornamental species and 3 species for vegetable.<\/p>\n

Keywords:<\/em><\/strong> Threatened species, Plants of Phia Oac – Phia Den National Park<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>KHU V\u1ef0C PH\u00c2N B\u1ed0 V\u00c0 KI\u1ec2U TH\u1ea2M TH\u1ef0C V\u1eacT
\nC\u1ee6A T\u01a0M TR\u01a0NG (Urceola minutiflora<\/em> (Pierre) D.J.Middleton) \u1ede T\u00c2Y NGUY\u00caN<\/p>\n

<\/a>Nguy\u1ec5n Thanh Nguy\u00ean1<\/sup>, Ph\u00f3 \u0110\u1ee9c \u0110\u1ec9nh2<\/sup>, Ho\u00e0ng Thanh Tr\u01b0\u1eddng1<\/sup>, L\u01b0u Th\u1ebf Trung1<\/sup>,
\nNguy\u1ec5n Qu\u1ed1c Huy1<\/sup>, Ng\u00f4 B\u1ea3o Uy\u00ean3<\/sup>, B\u00f9i Xu\u00e2n Ti\u1ebfn4<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean, 2<\/sup>Chi C\u1ee5c Ki\u1ec3m l\u00e2m L\u00e2m \u0110\u1ed3ng,
\n3 <\/sup>\u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t, 4 <\/sup>Tr\u01b0\u1eddng PT D\u00e2n t\u1ed9c B\u00e1n tr\u00fa S\u01a1n \u0110i\u1ec1n, Di Linh, L\u00e2m \u0110\u1ed3ng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

T\u01a1m tr\u01a1ng (Urceola minutiflora<\/em> (Pierre) D.J.Middleton) hay c\u00f2n g\u1ecdi l\u00e0 T\u01a1m tr\u01a1ng Atao Nenso l\u00e0 d\u00e2y leo th\u00e2n g\u1ed7 thu\u1ed9c h\u1ecd Tr\u00fac \u0110\u00e0o (Apocynaceae). \u0110\u00e2y l\u00e0 lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u, th\u00e0nh ph\u1ea7n ch\u00ednh trong b\u00e0i thu\u1ed1c d\u00e2n gian Amak\u00f4ng, l\u00e0m t\u0103ng c\u01b0\u1eddng th\u1ec3 l\u1ef1c v\u00e0 kh\u1ea3 n\u0103ng sinh l\u00fd \u1edf nam gi\u1edbi. Qua \u0111i\u1ec1u tra 5 t\u1ec9nh T\u00e2y Nguy\u00ean, \u0111\u1ec1 t\u00e0i \u0111\u00e3 b\u1eaft g\u1eb7p T\u01a1m tr\u01a1ng ph\u00e2n b\u1ed1 \u1edf ba t\u1ec9nh l\u00e0 Gia Lai (Kr\u00f4ng Pa), \u0110\u1eafk L\u1eafk (Ea H\u2019leo v\u00e0 V\u01b0\u1eddn Qu\u1ed1c gia Yok \u0110\u00f4n) v\u00e0 L\u00e2m \u0110\u1ed3ng (\u0110\u1ee9c Tr\u1ecdng). T\u01a1m tr\u01a1ng ph\u00e2n b\u1ed1 \u1edf \u0111\u1ed9 cao t\u1eeb 200 – 900 m, t\u1eadp trung t\u1eeb 300 – 500 m, tr\u00ean \u0111\u1ea5t sa th\u1ea1ch ho\u1eb7c \u0111\u1ea5t s\u00e9t pha c\u00e1t. V\u1ec1 ki\u1ec3u th\u1ea3m, T\u01a1m tr\u01a1ng ph\u00e2n b\u1ed1 trong 3 ki\u1ec3u th\u1ea3m ch\u00ednh theo ph\u00e2n lo\u1ea1i c\u1ee7a Th\u00e1i V\u0103n Tr\u1eebng (1975) l\u00e0: (1) V: R\u1eebng th\u01b0a c\u00e2y l\u00e1 r\u1ed9ng h\u01a1i kh\u00f4 nhi\u1ec7t \u0111\u1edbi; v\u1edbi 2 ki\u1ec3u ph\u1ee5 l\u00e0 R\u1eebng kh\u00f4 th\u01b0a tr\u00ean \u0111\u1ea5t c\u00e1t v\u00e0 s\u00e9t pha c\u00e1t (V.Mia.2) v\u00e0 Qu\u1ea7n th\u1ec3 tho\u00e1i h\u00f3a th\u00e0nh tr\u1ea3ng c\u1ecf, c\u00e2y b\u1ee5i (V.Mia.4.2) c\u1ee7a r\u1eebng th\u01b0a c\u00e2y l\u00e1 r\u1ed9ng h\u01a1i kh\u00f4 nhi\u1ec7t \u0111\u1edbi (V); (2) II: R\u1eebng k\u00edn n\u1eeda r\u1ee5ng l\u00e1 \u1ea9m nhi\u1ec7t \u0111\u1edbi (II.Mia); (3) R\u1eebng tr\u1ed3ng B\u1ea1ch \u0111\u00e0n microcorys (Eucalyptus microcorys<\/em>).<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00e2y T\u01a1m tr\u01a1ng, ki\u1ec3u th\u1ea3m, v\u00f9ng ph\u00e2n b\u1ed1<\/td>\n<\/tr>\n

\n

<\/a>Distribution area and vegetation type of Urceola minutiflora<\/em> (Pierre) D.J.Middleton in the Central Highland<\/strong><\/p>\n

Urceola minutiflora<\/em> or Tom trong Atao Nenso is a woody vine species of the family Apocynaceae. This medicinal plant is the main ingredient of Amakong folk remedies used to enhance strength and improve male sexual health. The survey showed that the distribution area of Urceola minutiflora<\/em> includes Gia Lai (Krong Pa), Dak Lak (Ea H\u2019leo district and Yok Don National Park) and Lam Dong (Duc Trong) province in the Central Highland. The Urceola minutiflora<\/em> grows at the altitude of 200 to 900 m but clusters at 300 to 500 m above sea level on sandstone soil or sandy clay. According to the classification of Thai Van Trung (1975), distribution of Urceola minutiflora<\/em> was in three types: (1) V: Tropical semi – drought broad – leaved sparse forest; with 2 extra subformation is dried – sparse forests on sandy soils and clays mixed sand (V. Mia. 2) and its degenerated population was grass and shrubs (V. Mia.4.2); (2) Tropical semi – deciduous closed forest (II.Mia); (3) Artificial forest of Eucalyptus (Eucalyptus microcorys<\/em>).<\/p>\n

Keywords:<\/em><\/strong> Urceola minutiflora <\/em>(Pierre) D.J.Middleton, <\/em>Vegetation type, Distribution area<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U T\u00c1I SINH C\u00c2Y B\u1ea0CH \u0110\u00c0N LAI UP (E. urophylla x E. pellita<\/em>) TH\u00d4NG QUA PH\u00d4I SOMA PH\u1ee4C V\u1ee4 CHO CHUY\u1ec2N GEN<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e01*<\/sup>, Nguy\u1ec5n Th\u1ecb Huy\u1ec1n1<\/sup>, L\u00ea Th\u1ecb Th\u1ee7y1<\/sup>,
\nTr\u1ea7n Th\u1ecb Thu H\u00e01<\/sup>, L\u00ea S\u01a1n1<\/sup>, Tr\u1ea7n \u0110\u1ee9c V\u01b0\u1ee3ng1<\/sup>, Nguy\u1ec5n H\u1eefu S\u1ef91<\/sup>,
\nNguy\u1ec5n \u0110\u1ee9c Ki\u00ean1<\/sup>, \u0110\u00e0o Th\u1ecb Thu\u1ef3 Trang2<\/sup>, Ph\u00f9ng Th\u1ecb Kim Hu\u1ec72<\/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
\nVi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2 <\/sup>Tr\u01b0\u1eddng PTTH chuy\u00ean H\u00f9ng V\u01b0\u01a1ng – Gia Lai<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u t\u00e1i sinh ch\u1ed3i th\u00f4ng qua ph\u00f4i soma l\u00e0 b\u01b0\u1edbc c\u1ea7n thi\u1ebft \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho c\u00f4ng t\u00e1c chuy\u1ec3n gen. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u t\u00e1i sinh B\u1ea1ch \u0111\u00e0n lai UP cho th\u1ea5y v\u1edbi v\u1eadt li\u1ec7u ban \u0111\u1ea7u l\u00e0 \u0111o\u1ea1n th\u00e2n v\u00e0 m\u1ea3nh l\u00e1 c\u1ee7a ch\u1ed3i in vitro <\/em>\u0111\u01b0\u1ee3c nu\u00f4i c\u1ea5y tr\u00ean m\u00f4i tr\u01b0\u1eddng MS gi\u1ea3m \u00bd Nit\u01a1 t\u1ed5ng s\u1ed1 (MS*) b\u1ed5 sung 3,0 mg\/l BAP, 0,5 mg\/l NAA, 20 g\/l Sucrose, 100 ml\/l n\u01b0\u1edbc d\u1eeba v\u00e0 2,4 g\/l Gelrite cho t\u1ef7 l\u1ec7 m\u1eabu t\u1ea1o m\u00f4 s\u1eb9o \u0111\u1ea1t 88,3% \u0111\u1ed1i v\u1edbi \u0111o\u1ea1n th\u00e2n v\u00e0 81,7% \u0111\u1ed1i v\u1edbi m\u1ea3nh l\u00e1. M\u00f4 s\u1eb9o sau \u0111\u00f3 \u0111\u01b0\u1ee3c k\u00edch th\u00edch nh\u00e2n sinh kh\u1ed1i v\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o ph\u00f4i soma tr\u00ean m\u00f4i tr\u01b0\u1eddng MS* b\u1ed5 sung 1,0 mg\/l BAP, 0,5 mg\/l NAA, 20 g\/l Sucrose, 100 ml\/l n\u01b0\u1edbc d\u1eeba v\u00e0 2,4 g\/l Gelrite cho t\u1ef7 l\u1ec7 t\u1ea1o m\u00f4 s\u1eb9o c\u1ea3m \u1ee9ng t\u1ea1o ph\u00f4i soma l\u00e0 65,6%. C\u1ee5m ph\u00f4i soma n\u1ea3y m\u1ea7m tr\u00ean m\u00f4i tr\u01b0\u1eddng MS* b\u1ed5 sung 0,5 mg\/l BAP, 0,2 mg\/l NAA, 20 g\/l Sucrose, 100 ml\/l n\u01b0\u1edbc d\u1eeba v\u00e0 2,4 g\/l Gelrite cho t\u1ef7 l\u1ec7 c\u1ee5m ph\u00f4i n\u1ea3y ch\u1ed3i \u0111\u1ea1t 69,3%, s\u1ed1 ch\u1ed3i trung b\u00ecnh \u0111\u1ea1t 6,1 ch\u1ed3i\/c\u1ee5m ph\u00f4i. M\u00f4i tr\u01b0\u1eddng MS b\u1ed5 sung 0,5 mg\/l BAP, 0,25 mg\/l NAA, 30 g\/l Sucrose, 15 mg\/l Riboflavin v\u00e0 6,5 g\/l Agar th\u00edch h\u1ee3p cho t\u1ea1o \u0111a ch\u1ed3i v\u1edbi h\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i \u0111\u1ea1t 6,5 ch\u1ed3i\/c\u1ee5m. M\u00f4i tr\u01b0\u1eddng \u00bd MS b\u1ed5 sung 2,0 mg\/l IBA, 1,0 mg\/l NAA, 15 g\/l Sucrose v\u00e0 7 g\/l Agar cho t\u1ef7 l\u1ec7 ch\u1ed3i ra r\u1ec5 \u0111\u1ea1t 90,0%, s\u1ed1 r\u1ec5 TB\/ch\u1ed3i 5,9 r\u1ec5 v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 trung b\u00ecnh l\u00e0 1,6 cm. Sau khi b\u00ecnh c\u00e2y \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n 7 – 10 ng\u00e0y, c\u00e2y con \u0111\u01b0\u1ee3c c\u1ea5y v\u00e0o c\u00e1t v\u00e0ng; sau 2 tu\u1ea7n, c\u00e2y con \u0111\u01b0\u1ee3c c\u1ea5y v\u00e0o b\u1ea7u v\u1edbi th\u00e0nh ph\u1ea7n gi\u00e1 th\u1ec3 l\u00e0 70% \u0111\u1ea5t \u0111\u1ed3i, 20% x\u01a1 d\u1eeba v\u00e0 10% ph\u00e2n vi sinh cho t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t tr\u00ean 90%. H\u1ec7 th\u1ed1ng t\u00e1i sinh c\u00e2y B\u1ea1ch \u0111\u00e0n lai UP th\u00f4ng qua t\u1ea1o ph\u00f4i soma c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng \u0111\u1ec3 chuy\u1ec3n gen c\u1ea3i thi\u1ec7n gi\u1ed1ng b\u1ea1ch \u0111\u00e0n n\u00e0y.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea1ch \u0111\u00e0n lai UP, in vitro, <\/em>m\u00f4 s\u1eb9o, ph\u00f4i soma, t\u00e1i sinh<\/td>\n<\/tr>\n

\n

<\/a>Study of background reproductive plants through soma for gene transfer<\/strong><\/p>\n

Leaf and stem of 15 days tissue culture shoots were used as explants to establish a regeneration protocol for Eucalyptus hybrid between\u00a0E. urophylla<\/em>\u00a0and\u00a0E. pellita<\/em>\u00a0(UP hybrid). The explants were cultured on modified MS medium (MS medium reduced half total nitrogen) supplemented with 3.0 mg\/l 6 – benzylaminopurine (BAP), 0.5 mg\/l naphthalene acetic acid (NAA), 2% sucrose, 100 ml\/l coconut water and 2.4 g\/l phytagel, the ratio of callus induction was 88.3% and 81.7% with the stem and in the leaf materials, respectively. Callus was cultured in MS medium (reduced half total nitrogen) supplemented with 0.5 mg\/l BAP, 0.2 mg\/l NAA, 2% sucrose, 15mg\/l riboflavin, 100 ml\/l coconut water and 2 g\/l phytage, showed a high frequency of adventitious buds formation (69.3%). Regenerated shoots were rooted in \u00bd MS medium supplemented with 2.0 mg\/l indole – 3 – butyric acid (IBA), 1.0 mg\/l NAA, 1.5% sucrose and 7g\/l Agar. Plantlets were then successfully transplanted to the greenhouse with 90% survival. Generally, Eucalyptus hybrid between\u00a0E. urophylla<\/em>\u00a0and\u00a0E. pellita<\/em>regeneration protocol via somatic embryogenesis induction\u00a0<\/strong>could be used for genetic transformation.<\/p>\n

Keywords:<\/em><\/strong> UP hybrid,\u00a0in vitro,<\/em> callus,\u00a0somatic embryo, regeneration<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U CHUY\u1ec2N GEN EcHB1<\/em>
\nL\u00c0M T\u0102NG CHI\u1ec0U D\u00c0I S\u1ee2I G\u1ed6 CHO D\u00d2NG B\u1ea0CH \u0110\u00c0N LAI UP TH\u00d4NG QUA Agrobacterium tumefaciens<\/em><\/p>\n

<\/a>Tr\u1ea7n Th\u1ecb Thu H\u00e01*<\/sup>, L\u00ea Th\u1ecb Th\u1ee7y1<\/sup>, Nguy\u1ec5n Th\u1ecb Huy\u1ec1n1<\/sup>, Nguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e01<\/sup>,
\nTr\u1ea7n \u0110\u1ee9c V\u01b0\u1ee3ng1<\/sup>, L\u00ea S\u01a1n1<\/sup>, Nguy\u1ec5n \u0110\u1ee9c Ki\u00ean1<\/sup>, Nguy\u1ec5n H\u1eefu S\u1ef91<\/sup>, T\u00f4 Nh\u1eadt Minh2<\/sup>,
\n\u0110\u00e0o Th\u1ecb Thu\u1ef3 Trang2<\/sup>, Ph\u00f9ng Th\u1ecb Kim Hu\u1ec72<\/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
\nVi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2 <\/sup>Tr\u01b0\u1eddng PTTH chuy\u00ean H\u00f9ng V\u01b0\u01a1ng – Gia Lai<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Gen EcHB<\/em>1 l\u00e0 gen gi\u00fap t\u0103ng chi\u1ec1u d\u00e0i s\u1ee3i g\u1ed7 cho b\u1ea1ch \u0111\u00e0n \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n l\u1eadp t\u1eeb b\u1ea1ch \u0111\u00e0n grandis (E. grandis<\/em>). Trong nghi\u00ean c\u1ee9u n\u00e0y, ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh chuy\u1ec3n gen EcHB<\/em>1 v\u00e0o b\u1ea1ch \u0111\u00e0n lai UP (E. urophylla <\/em>\u00b4 E. pellita<\/em>) th\u00f4ng qua vi khu\u1ea9n A. tumefaciens<\/em>. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh ng\u01b0\u1ee1ng n\u1ed3ng \u0111\u1ed9 ch\u1ea5t ch\u1ecdn l\u1ecdc kanamycin t\u1edbi kh\u1ea3 n\u0103ng s\u1ed1ng c\u1ee7a m\u1eabu l\u00e0 150 mg\/l v\u00e0 t\u1edbi kh\u1ea3 n\u0103ng ra r\u1ec5 c\u1ee7a ch\u1ed3i l\u00e0 50 mg\/l. S\u1eed d\u1ee5ng d\u1ecbch khu\u1ea9n A. tumefaciens<\/em> n\u1ed3ng \u0111\u1ed9 OD600<\/sub> = 0,5 \u0111\u1ec3 bi\u1ebfn n\u1ea1p gen EcHB<\/em>1 trong dung d\u1ecbch huy\u1ec1n ph\u00f9 c\u00f3 b\u1ed5 sung 100 \u00b5M Acetosyringone v\u00e0o b\u1ea1ch \u0111\u00e0n lai UP v\u1edbi th\u1eddi gian bi\u1ebfn n\u1ea1p 10 ph\u00fat. Sau 72 gi\u1edd \u0111\u1ed3ng nu\u00f4i c\u1ea5y, c\u00e1c \u0111o\u1ea1n th\u00e2n v\u00e0 l\u00e1 \u0111\u00e3 bi\u1ebfn n\u1ea1p gen \u0111\u01b0\u1ee3c t\u00e1i sinh tr\u00ean m\u00f4i tr\u01b0\u1eddng ch\u1ecdn l\u1ecdc MS* b\u1ed5 sung 0,5 mg\/l BAP, 0,2 mg\/l NAA, 400 mg\/l Cefotaxim v\u00e0 150 mg\/l Kanamycin. Sau ba l\u1ea7n ch\u1ecdn l\u1ecdc tr\u00ean m\u00f4i tr\u01b0\u1eddng t\u00e1i sinh, c\u00e1c ch\u1ed3i b\u1ea1ch \u0111\u00e0n lai UP chuy\u1ec3n gen \u0111\u01b0\u1ee3c c\u1ea5y tr\u00ean m\u00f4i tr\u01b0\u1eddng ra r\u1ec5 ch\u1ecdn l\u1ecdc c\u00f3 b\u1ed5 sung 50g\/l Kanamycin. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch c\u00e2y chuy\u1ec3n gen giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p PCR \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh s\u1ef1 c\u00f3 m\u1eb7t c\u1ee7a gen EcHB<\/em>1 trong c\u00e2y b\u1ea1ch \u0111\u00e0n lai UP.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea1ch \u0111\u00e0n lai UP, chuy\u1ec3n gen, chi\u1ec1u d\u00e0i s\u1ee3i g\u1ed7, gen EcHB<\/em>1<\/td>\n<\/tr>\n

\n

<\/a>Introdution of the EcHB1 gene into E. urophylla \u00b4 E. pellita hybrid via Agrobacterium tumefaciens<\/strong><\/p>\n

The gene EcHB1, is isolated from E. grandis, encoding for increasing the wood fiber length was transferred into superior clones of E. urophylla \u00b4 E. pellita (UP hybrid) via Agrobacterium tumefaciens. Use A. tumefaciens concentration of OD600 <\/sub>= 0.5 to transform the EcHB1 gene in the suspension solution with 100 \u00b5M Acetosyringone into UP hybrid for 10 mins. After 72 hours of co – culture, the transgenic stem and leaf segments were regenerated on MS* selective medium supplemented with 0.5 mg\/l BAP, 0.2 mg\/l NAA, 400 mg\/l Cefotaxim and 150 mg\/l Kanamycin. After three selections on the regenerative medium, transgenic UP hybrid shoots were transplanted on selective rooting medium supplemented with 50 g\/l Kanamycin. Results of the analysis of nursery plants by PCR method confirmed the presence of the EcHB1 gene in the UP hybrid tree.<\/p>\n

Keywords:<\/em><\/strong> UP hybrid, transgenic, wood fiber length, EcHB1 gene,<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>T\u0102NG TR\u01af\u1edeNG SINH KH\u1ed0I TR\u00caN M\u1eb6T \u0110\u1ea4T
\nC\u1ee6A R\u1eeaNG TH\u1ee8 SINH L\u00c1 R\u1ed8NG TH\u01af\u1edcNG XANH
\nT\u1ea0I KON H\u00c0 N\u1eeaNG, GIA LAI<\/p>\n

<\/a>Tr\u1ea7n Ho\u00e0ng Qu\u00fd, Ninh Vi\u1ec7t Kh\u01b0\u01a1ng, Tr\u1ea7n Cao Nguy\u00ean<\/p>\n

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

Vi\u1ec7c \u01b0\u1edbc l\u01b0\u1ee3ng sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c \u0111\u1ec3 d\u1ef1 b\u00e1o bi\u1ebfn \u0111\u1ed9ng c\u1ee7a tr\u1eef l\u01b0\u1ee3ng c\u00e1c bon l\u01b0u tr\u1eef trong h\u1ec7 sinh th\u00e1i r\u1eebng l\u00e0 r\u1ea5t quan tr\u1ecdng. Tr\u1eef l\u01b0\u1ee3ng c\u00e1c bon \u0111\u01b0\u1ee3c \u01b0\u1edbc l\u01b0\u1ee3ng l\u00e0 b\u1eb1ng 50% tr\u1eef l\u01b0\u1ee3ng sinh kh\u1ed1i. Nghi\u00ean c\u1ee9u n\u00e0y s\u1eed d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan sinh kh\u1ed1i \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t c\u1ee7a r\u1eebng th\u1ee9 sinh l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh t\u1ea1i Kon H\u00e0 N\u1eebng, Gia Lai. Nghi\u00ean c\u1ee9u k\u1ebf th\u1eeba s\u1ed1 li\u1ec7u c\u1ee7a 10 \u00f4 ti\u00eau chu\u1ea9n \u0111\u1ecbnh v\u1ecb 10.000 m2<\/sup>\/\u00f4 v\u00e0 6 \u00f4 th\u00ed nghi\u1ec7m cho hai tr\u1ea1ng th\u00e1i r\u1eebng c\u00f3 k\u00edch th\u01b0\u1edbc 900 m2<\/sup>\/\u00f4. K\u1ebf th\u1eeba s\u1ed1 li\u1ec7u gi\u1ea3i t\u00edch sinh kh\u1ed1i c\u1ee7a 36 c\u00e2y m\u1eabu \u0111\u1ec3 ki\u1ec3m tra c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan v\u00e0 l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng tr\u00ecnh t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t. K\u1ebft qu\u1ea3 \u0111\u00e3 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng tr\u00ecnh AGB = 0,0755*D1,3<\/sub>2,57<\/sup> (R = 0,995) l\u00e0 c\u00f3 sai s\u1ed1 nh\u1ecf nh\u1ea5t. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y \u0111\u00e3 \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u0103ng tr\u01b0\u1edfng sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t c\u1ee7a c\u00e1c \u00f4 ti\u00eau chu\u1ea9n \u0111\u1ecbnh v\u1ecb bi\u1ebfn thi\u00ean t\u1eeb 0,25 \u0111\u1ebfn 8,3 t\u1ea5n\/ha\/n\u0103m, \u0111\u1ea1t trung b\u00ecnh 5,8 \u00b1 2,3 t\u1ea5n\/ha\/n\u0103m. Sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng \u0111\u1ea1t b\u00ecnh qu\u00e2n 8,5 \u00b1 1,2 t\u1ea5n\/ha\/n\u0103m. K\u1ebft qu\u1ea3 t\u00ednh to\u00e1n t\u1eeb c\u00e1c \u00f4 th\u00ed nghi\u1ec7m cho th\u1ea5y, t\u0103ng tr\u01b0\u1edfng sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t bi\u1ebfn thi\u00ean t\u1eeb 12,6 \u0111\u1ebfn 14,8 t\u1ea5n\/ha\/n\u0103m, cao nh\u1ea5t \u1edf r\u1eebng ph\u1ee5c h\u1ed3i v\u00e0 th\u1ea5p nh\u1ea5t \u1edf r\u1eebng \u00edt b\u1ecb t\u00e1c \u0111\u1ed9ng. Trong \u0111\u00f3, t\u1ef7 l\u1ec7 sinh kh\u1ed1i s\u1ed1ng chi\u1ebfm t\u1eeb 40,6 \u0111\u1ebfn 52,3% v\u00e0 sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm t\u1eeb 47,7 \u0111\u1ebfn 59,4%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Kon H\u00e0 N\u1eebng, sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t, r\u1eebng th\u1ee9 sinh l\u00e1 r\u1ed9ng th\u01b0\u1eddng nhanh<\/td>\n<\/tr>\n

\n

<\/a>Belowground biomass increment of secondary evergreen broadleaf forests in Kon Ha Nung, Gia Lai province<\/strong><\/p>\n

Accurate estimates of aboveground biomass to monitoring carbon budget in forest ecosystems are very important. Carbon budget is estimated as 50% of biomass stock. This study used allometric models to estimate aboveground biomass of secondary evergreen broadleaf forests in Kon Ha Nung, Gia Lai. The result shown that the allometric equation AGB = 0,0755*D1,3<\/sub>2,57<\/sup> (R = 0,995) had least error and was selected to estimate aboveground biomass. Annual increment of biomass of forests from permanent sample plots varies from 0.25 to 8.3 ton\/ha\/year with an average of 5.8 \u00b1 2.3 ton\/ha\/year. Results from 6 experiment sample plots shown that increment of abovegrond biomass varies from 12.6 in low impacted forests to 14.8 ton\/ha\/year in restored forests. In which, the rate of living biomass account of from 40.6 to 52.3% and bimass of litterfall account from 47.7 to 59.4%.<\/p>\n

Keywords:<\/em><\/strong> Kon Ha Nung, Aboveground biomass, secondary evergreen broadleaf forests<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC LO\u00c0I M\u1ea0Y CH\u00c2U (<\/em>Carya tonkinensis<\/em>\u00a0Lecomte) \u1ede TR\u1ea0NG TH\u00c1I R\u1eeaNG T\u1ef0 NHI\u00caN PH\u1ee4C H\u1ed2I T\u1ea0I TH\u00c0NH PH\u1ed0 S\u01a0N LA, T\u1ec8NH S\u01a0N LA<\/p>\n

<\/a>V\u0169 V\u0103n Thu\u1eadn1<\/sup>, L\u00f2 Th\u1ecb H\u1ed3ng Xoan2<\/sup>, Tr\u1ea7n Anh Tu\u1ea5n3<\/sup><\/p>\n

1<\/sup> Trung t\u00e2m NC&CG k\u1ef9 thu\u1eadt L\u00e2m sinh, Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\n2<\/sup> Chi c\u1ee5c Ki\u1ec3m l\u00e2m S\u01a1n La
\n3<\/sup> Tr\u01b0\u1eddng \u0110H T\u00e2y B\u1eafc<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1ea1y ch\u00e2u l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba, g\u1ed7 l\u1edbn, \u0111a t\u00e1c d\u1ee5ng, c\u00f3 v\u00f9ng ph\u00e2n b\u1ed1 h\u1eb9p. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i c\u00f3 M\u1ea1y ch\u00e2u ph\u00e2n b\u1ed1 tr\u00ean \u0111\u1ecba b\u00e0n th\u00e0nh ph\u1ed1 S\u01a1n La, t\u1ec9nh S\u01a1n La. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, M\u1ea1y ch\u00e2u l\u00e0 lo\u00e0i c\u00e2y chi\u1ebfm \u01b0u th\u1ebf trong t\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y cao v\u1edbi h\u1ec7 s\u1ed1 t\u1ed5 th\u00e0nh IV% chi\u1ebfm t\u1eeb 8,45 – 10,9% v\u00e0 m\u1eadt \u0111\u1ed9 trung b\u00ecnh 20 c\u00e2y\/ha. Ph\u00e2n b\u1ed1 n\/D1.3<\/sub> v\u00e0 n\/Hvn<\/sub> c\u1ee7a t\u1ea7ng c\u00e2y cao trong c\u00e1c l\u00e2m ph\u1ea7n c\u00f3 M\u1ea1y ch\u00e2u ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu c\u00f3 d\u1ea1ng m\u1ed9t \u0111\u1ec9nh, l\u1ec7ch tr\u00e1i. M\u1ea1y ch\u00e2u c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1eeb h\u1ea1t v\u00e0 ch\u1ed3i t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t v\u1edbi h\u1ec7 s\u1ed1 t\u1ed5 th\u00e0nh t\u1eeb 0,70 – 0,94 v\u00e0 m\u1eadt \u0111\u1ed9 t\u1eeb 166 – 332 c\u00e2y\/ha. T\u1ef7 l\u1ec7 c\u00e2y M\u1ea1y ch\u00e2u t\u00e1i sinh c\u00f3 chi\u1ec1u cao tr\u00ean 1 m \u0111\u1ea1t 79,16% \u0111\u1ebfn 81,25%. T\u1ef7 l\u1ec7 c\u00e2y M\u1ea1y ch\u00e2u t\u00e1i sinh c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng trung b\u00ecnh v\u00e0 t\u1ed1t chi\u1ebfm t\u1ef7 l\u1ec7 cao t\u1eeb 81,3% \u0111\u1ebfn 91,7%. T\u1ea7n su\u1ea5t xu\u1ea5t hi\u1ec7n c\u00e2y t\u00e1i sinh M\u1ea1y ch\u00e2u \u1edf m\u1ee9c kh\u00e1 v\u00e0 \u0111\u1ec1u.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u0110\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc, M\u1ea1y ch\u00e2u, r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i, S\u01a1n La<\/td>\n<\/tr>\n

\n

<\/a>Silvicultural characteristics of Carya tonkinensis<\/em> Lecomte in secondary forests in Son La city, Son La province<\/strong><\/p>\n

Carya tonkinensis\u00a0<\/em>Lecomte is a indigenous, large – sized, multi – purposes, narrowly distributed tree species. The research was conducted in rehabilitated natural forests where Carya tonkinensis<\/em>\u00a0Lecomte distributed in Son La city, Son La province. The results showed that Carya tonkinensis<\/em>\u00a0Lecomte is the dominant tree species in this secondary ecosystem with the important value (IV% index) of 8.45 – 10.9 and the average density of 20 trees\/ha. The frequency distribution in diameter (n\/D1.3<\/sub>) and height (n\/Hvn<\/sub>) were mainly in the left – handed shape. Seedling of Carya tonkinensis<\/em>\u00a0Lecomte could regenrated from seed bank or by copicing with species composition index ranging from 0.70 – 0.94 and density from 166 – 332 trees\/ha. Proportion of promising Carya tonkinensis<\/em>\u00a0Lecomte seedling (> 1 m in height) ranged from 79.16% to 81.25%. The rate of regenerated trees of medium and good quality accounts for a high proportion, ranging from 88.4% to 89.43%. The distribution of Carya tonkinensis<\/em>\u00a0Lecomte seedling among the site was quite equal.<\/p>\n

Keywords:<\/em><\/strong> Silvicultural Characteristics, Carya tonkinensis<\/em>\u00a0Lecomte, natural rehabilitation forest, Son La province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A BI\u1ec6N PH\u00c1P X\u1eec L\u00dd TH\u1ef0C B\u00cc
\n\u0110\u1ebeN SINH TR\u01af\u1edeNG C\u1ee6A R\u1eeaNG TR\u1ed2NG M\u1ed8T S\u1ed0 LO\u00c0I KEO \u1ede QU\u1ea2NG NINH<\/p>\n

<\/a>Nguy\u1ec5n Huy S\u01a1n, Ph\u1ea1m \u0110\u00ecnh S\u00e2m, V\u0169 Ti\u1ebfn L\u00e2m, H\u1ed3 Trung L\u01b0\u01a1ng<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/em>), Keo l\u00e1 tr\u00e0m (A. auriculiformis<\/em>) v\u00e0 keo lai (Acacia hybrids) l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 l\u1ef1c \u1edf n\u01b0\u1edbc ta hi\u1ec7n nay. X\u1eed l\u00fd th\u1ef1c b\u00ec tr\u01b0\u1edbc khi tr\u1ed3ng r\u1eebng l\u00e0 m\u1ed9t trong nh\u1eefng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt quan tr\u1ecdng c\u1ea7n \u0111\u01b0\u1ee3c quan t\u00e2m nghi\u00ean c\u1ee9u. Trong ph\u1ea1m vi nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 b\u1ed1 tr\u00ed 3 c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m x\u1eed l\u00fd th\u1ef1c b\u00ec, g\u1ed3m: 1\/ Ph\u00e1t th\u1ef1c b\u00ec to\u00e0n di\u1ec7n v\u00e0 r\u1ea3i \u0111\u1ec1u v\u1eadt li\u1ec7u h\u1eefu c\u01a1 tr\u00ean di\u1ec7n t\u00edch; 2\/ Ph\u00e1t th\u1ef1c b\u00ec to\u00e0n di\u1ec7n v\u00e0 gom v\u1eadt li\u1ec7u h\u1eefu c\u01a1 th\u00e0nh lu\u1ed1ng theo \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c; 3\/ Ph\u00e1t th\u1ef1c b\u00ec c\u1ee5c b\u1ed9 theo r\u1ea1ch (b\u0103ng ch\u1eeba r\u1ed9ng 1 m, r\u1ea1ch ch\u1eb7t r\u1ed9ng 2m). Sau 2 n\u0103m tr\u1ed3ng kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a keo tai t\u01b0\u1ee3ng \u0111\u00e3 kh\u00e1c nhau r\u00f5 r\u1ec7t gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec kh\u00e1c nhau, \u1edf c\u00e1c c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n sinh tr\u01b0\u1edfng cao h\u01a1n, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c (D1,3<\/sub>) t\u1eeb 6,35 – 6,97 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn (Hvn<\/sub>) t\u1eeb 6,54 – 7,12 m; trong khi \u0111\u00f3 \u1edf c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec theo r\u1ea1ch ch\u1ec9 \u0111\u1ea1t c\u00e1c tr\u1ecb s\u1ed1 t\u01b0\u01a1ng \u1ee9ng l\u00e0 6,09 cm v\u00e0 6,30 m. Sau 2 n\u0103m tr\u1ed3ng, sinh tr\u01b0\u1edfng c\u1ee7a Keo l\u00e1 tr\u00e0m \u1edf c\u00e1c c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec ch\u01b0a kh\u00e1c nhau r\u00f5 r\u1ec7t, \u0111\u01b0\u1eddng k\u00ednh dao \u0111\u1ed9ng t\u1eeb 5,03 – 5,52 cm, chi\u1ec1u cao dao \u0111\u1ed9ng t\u1eeb 6,02 – 6,32 m. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, sau 2 n\u0103m tr\u1ed3ng, keo lai sinh tr\u01b0\u1edfng \u1edf c\u00e1c c\u00f4ng th\u1ee9c x\u1eed l\u00fd th\u1ef1c b\u00ec c\u0169ng ch\u01b0a kh\u00e1c nhau r\u00f5 r\u1ec7t, \u0111\u01b0\u1eddng k\u00ednh (D1,3<\/sub>) t\u1eeb 6,81 – 7,16 cm, chi\u1ec1u cao (Hvn<\/sub>) t\u1eeb 7,12 – 7,72 m. V\u00ec v\u1eady, v\u1edbi n\u1ec1n r\u1eebng t\u1ef1 nhi\u00ean ngh\u00e8o ki\u1ec7t c\u00f3 chi\u1ec1u cao th\u1ea3m th\u1ef1c v\u1eadt d\u01b0\u1edbi 7 m, \u0111\u1ec3 tr\u1ed3ng Keo tai t\u01b0\u1ee3ng c\u1ea7n ph\u1ea3i x\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n v\u00e0 r\u1ea3i \u0111\u1ec1u v\u1eadt li\u1ec7u h\u1eefu c\u01a1 tr\u00ean di\u1ec7n t\u00edch ho\u1eb7c gom th\u00e0nh lu\u1ed1ng theo \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c (kh\u00f4ng \u0111\u1ed1t) \u0111\u1ec3 tr\u1ed3ng r\u1eebng Keo l\u00e1 tr\u00e0m v\u00e0 keo lai c\u00f3 th\u1ec3 x\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n (kh\u00f4ng \u0111\u1ed1t), nh\u01b0ng n\u00ean x\u1eed l\u00fd theo r\u1ea1ch c\u00f3 nhi\u1ec1u l\u1ee3i \u00edch h\u01a1n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo tai t\u01b0\u1ee3ng, Keo l\u00e1 tr\u00e0m, keo lai, x\u1eed l\u00fd th\u1ef1c b\u00ec \u0111\u1ec3 tr\u1ed3ng r\u1eebng, Qu\u1ea3ng Ninh<\/td>\n<\/tr>\n

\n

<\/a>Effects of vegetation treatment methods on the growth of various acacia species plantation forests in Quang Ninh province<\/strong><\/p>\n

Vegetation treatment before planting forest is one of the important technical measures, if vegetation treatment is unreasonable, it will reduce productivity and quality of forests, reduce soil fertility and affect long – term and sustainable business. Within the scope of this study, three experimental vegetation treatment formulas were applied for Acacia mangium, Acacia auriculiformis<\/em> and Acacia hybrids, including: 1\/ Comprehensive clearance and even organic materials spread on the area; 2\/ Comprehensive clearance and collect organic materials into beds along contour lines; 3\/ Selective clearance in strips (1 m – wide un – cut strips, 2 m – wide cutting strips). After 2 years of planting, the growth ability of A. mangium<\/em> was significantly different with different vegetation treatment formulas, namely higher growth with comprehensive clearance treatments, diameter at breast height (D1,3) was from 6.35 – 6.97 cm, total height (Hvn<\/sub>) from 6.54 to 7.12 m; meanwhile, in the selective clearance treatment formula, the mentioned values \u200b\u200bwere only 6.09 cm and 6.30 m respectively. After 2 years of planting, the growth of Acacia auriculiformis<\/em> with various treatment formulas was not significantly different, the diameter ranges from 5.03 – 5.52 cm, the height ranges from 6.02 – 6.32 m. Similarly, after 2 years of planting, Acacia hybrid growth with treatment formulas did not differs much, diameter (D1.3<\/sub>) from 6.81 – 7.16 cm, height (Hvn<\/sub>) from 7.12 – 7.72 m. Therefore, with the current status of poor natural forests, the height of vegetation below 7 m, to plant Acacia mangium<\/em>, it is necessary to to apply comprehensive vegetation clearance and even organic materials spread on the area or collect organic materials into beds along contour lines (no burning), for afforestation of Acacia auriculiformis<\/em> and acacia hybrid, all three methods of vegetation treatment can be applied, but selective clearance in strips should be used because of greater benefits it brings.<\/p>\n

Keywords:<\/em><\/strong> Acacia mangium<\/em>, Acacia auriculiformis, <\/em>Acacia hybrids, vegetation treatment before planting forest, Quang Ninh province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A M\u1eacT \u0110\u1ed8 \u0110\u1ebeN SINH TR\u01af\u1edeNG
\nC\u1ee6A M\u1ed8T S\u1ed0 LO\u00c0I KEO 2 N\u0102M TU\u1ed4I TR\u1ed2NG
\n\u1ede U\u00d4NG B\u00cd – QU\u1ea2NG NINH<\/p>\n

<\/a>V\u0169 Ti\u1ebfn L\u00e2m, H\u1ed3 Trung L\u01b0\u01a1ng, Ph\u1ea1m \u0110\u00ecnh S\u00e2m, Nguy\u1ec5n Huy S\u01a1n, Cao V\u0103n L\u1ea1ng<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng l\u00e0 m\u1ed9t trong nh\u1eefng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh quan tr\u1ecdng trong tr\u1ed3ng r\u1eebng th\u00e2m canh n\u00f3i chung, g\u00f3p ph\u1ea7n n\u00e2ng cao n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng, nh\u1ea5t l\u00e0 r\u1eebng tr\u1ed3ng th\u00e2m canh c\u00e1c lo\u00e0i keo lai (Acacia hybrids), Keo tai t\u01b0\u1ee3ng (Acacia<\/em> mangium<\/em>) v\u00e0 Keo l\u00e1 tr\u00e0m (A. auriculiformis<\/em>) ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch kinh doanh g\u1ed7 l\u1edbn. Trong ph\u1ea1m vi nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 b\u1ed1 tr\u00ed 4 c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m m\u1eadt \u0111\u1ed9 tr\u1ed3ng, g\u1ed3m: i\/ 1.660 c\u00e2y\/ha (2 \u00b4 3 m); ii\/ 1.110 c\u00e2y\/ha (3 \u00b4 3 m); iii\/ 830 c\u00e2y\/ha (3 \u00b4 4 m); iv\/ 625 c\u00e2y\/ha (4 \u00b4 4 m). Sau 2 n\u0103m tr\u1ed3ng, kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a keo lai \u1edf c\u00e1c c\u00f4ng th\u1ee9c m\u1eadt \u0111\u1ed9 \u0111\u00e3 kh\u00e1c nhau r\u00f5 r\u1ec7t c\u1ea3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c (D1,3<\/sub>) v\u00e0 chi\u1ec1u cao v\u00fat ng\u1ecdn (Hvn<\/sub>): \u0111\u01b0\u1eddng k\u00ednh l\u1edbn nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 625 c\u00e2y\/ha \u0111\u1ea1t 8,25 cm, gi\u1ea3m d\u1ea7n theo chi\u1ec1u t\u0103ng c\u1ee7a m\u1eadt \u0111\u1ed9 v\u00e0 nh\u1ecf nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 1.660 c\u00e2y\/ha ch\u1ec9 \u0111\u1ea1t 7,08 cm; ng\u01b0\u1ee3c l\u1ea1i, chi\u1ec1u cao l\u1edbn nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 1.660 c\u00e2y\/ha \u0111\u1ea1t 7,96 m, gi\u1ea3m d\u1ea7n theo chi\u1ec1u gi\u1ea3m c\u1ee7a m\u1eadt \u0111\u1ed9 v\u00e0 nh\u1ecf nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 625 c\u00e2y\/ha ch\u1ec9 \u0111\u1ea1t 7,37 m. Sinh tr\u01b0\u1edfng c\u1ee7a Keo tai t\u01b0\u1ee3ng 2 n\u0103m tu\u1ed5i \u1edf c\u00e1c c\u00f4ng th\u1ee9c m\u1eadt \u0111\u1ed9 \u0111\u00e3 kh\u00e1c nhau r\u00f5 r\u1ec7t c\u1ea3 \u0111\u01b0\u1eddng k\u00ednh (D1,3<\/sub>) v\u00e0 chi\u1ec1u cao (Hvn<\/sub>): \u0111\u01b0\u1eddng k\u00ednh l\u1edbn nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 625 c\u00e2y\/ha \u0111\u1ea1t 7,27 cm, gi\u1ea3m d\u1ea7n theo chi\u1ec1u t\u0103ng c\u1ee7a m\u1eadt \u0111\u1ed9 v\u00e0 nh\u1ecf nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 1.660 c\u00e2y\/ha l\u00e0 6,39 cm; chi\u1ec1u cao l\u1edbn nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 1.660 c\u00e2y\/ha \u0111\u1ea1t 6,14 m, gi\u1ea3m d\u1ea7n theo chi\u1ec1u gi\u1ea3m c\u1ee7a m\u1eadt \u0111\u1ed9 v\u00e0 nh\u1ecf nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 625 c\u00e2y\/ha ch\u1ec9 \u0111\u1ea1t 5,99 m. Kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a Keo l\u00e1 tr\u00e0m 2 n\u0103m tu\u1ed5i \u1edf c\u00e1c c\u00f4ng th\u1ee9c m\u1eadt \u0111\u1ed9 \u0111\u00e3 kh\u00e1c nhau r\u00f5 r\u1ec7t v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh (D1,3<\/sub>), l\u1edbn \u1edf m\u1eadt \u0111\u1ed9 625 c\u00e2y\/ha \u0111\u1ea1t 6,86 cm v\u00e0 nh\u1ecf nh\u1ea5t \u1edf m\u1eadt \u0111\u1ed9 1.660 c\u00e2y\/ha ch\u1ec9 \u0111\u1ea1t 5,25 cm; nh\u01b0ng chi\u1ec1u cao (Hvn<\/sub>) l\u1ea1i ch\u01b0a kh\u00e1c nhau r\u00f5 r\u1ec7t v\u1ec1 m\u1eb7t th\u1ed1ng k\u00ea v\u1edbi c\u00e1c tr\u1ecb s\u1ed1 trung b\u00ecnh dao \u0111\u1ed9ng t\u1eeb 6,37 – 6,96 m, kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a chi\u1ec1u cao c\u0169ng c\u00f3 xu h\u01b0\u1edbng t\u0103ng d\u1ea7n t\u1eeb m\u1eadt \u0111\u1ed9 th\u1ea5p t\u1edbi m\u1eadt \u0111\u1ed9 cao. K\u1ebft qu\u1ea3 tr\u00ean \u0111\u00e2y m\u1edbi ch\u1ec9 l\u00e0 k\u1ebft qu\u1ea3 b\u01b0\u1edbc \u0111\u1ea7u trong giai \u0111o\u1ea1n r\u1eebng m\u1edbi kh\u00e9p t\u00e1n, c\u1ea7n ph\u1ea3i theo d\u00f5i th\u00eam t\u1eeb 1 n\u0103m \u0111\u1ebfn 2 n\u0103m ti\u1ebfp theo khi r\u1eebng \u0111\u00e3 giao t\u00e1n m\u1ea1nh \u0111\u1ec3 c\u00f3 nh\u1eefng k\u1ebft lu\u1eadn ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo tai t\u01b0\u1ee3ng, Keo l\u00e1 tr\u00e0m, keo lai, m\u1eadt \u0111\u1ed9 tr\u1ed3ng, Qu\u1ea3ng Ninh<\/td>\n<\/tr>\n

\n

<\/a>The effects of planting density to the growth of some acacia species 2 year old in Quang Ninh province<\/strong><\/p>\n

Density of plantation is an important silviculture treatment for intensive forest planting, that contributes improves productivity and quality of plantation, especially intensive plantation of Acacia hybrids, Acacia mangium<\/em>, and A. auriculiformis <\/em>for the large timber production purposes. In this study, four different density levels were used include: i\/ 1,660 trees\/ha (2 \u00b4 3m); ii\/ 1,110 trees\/ha (3 \u00b4 3 m); iii\/ 830 trees\/ha (3 \u00b4 4 m); iv\/ 625 trees\/ha (4 \u00b4 4 m). After 2 years, the growth of Acacia hybrids in four density levels are significant difference in both of Diameter at Breast Height (DBH) and Height (H): The highest average DBH reached 8.25 cm with the density of 625 trees\/ha, DBH gradually decreasing when density increasing and the smallest DBH is 7.08 cm with density of 1,660 trees\/ha; the highest average Height reached 7.96 m with the density of 1660 trees\/ha, average Height gradually decreasing when density decreasing and the smallest Height is 7.37 m with density of 625 trees\/ha. The growth of Acacia mangium<\/em> of four density levels are significant difference in both of average Diameter at Breast Height (DBH) and average Height (H): The highest average DBH reached 7.27 cm with the density of 625 trees\/ha, DBH gradually decreasing when density increasing and the smallest average DBH is 6.39 cm with density of 1,660 trees\/ha; the highest average Height reached 6.14 m with the density of 1660 trees\/ha, Height gradually decreasing when density decreasing and smallest average Height is 5.99 m with density of 625 trees\/ha. The growth of A. auriculiformis<\/em> of four density levels are significant difference about average Diameter at Breast Height (DBH): The highest average DBH reached 6.86 cm with the density of 625 trees\/ha, DBH gradually decreasing when density increasing and the smallest average DBH is 5.25 cm with density of 1,660 trees\/ha; Height are not significant different with the average Height from 6.37 – 6.96 m. However, average height also tends to increase from low density to high density. That results just an initial results in the period new forest closure canopy, further investigation is required in the next 1 – 2 years for more accurate conclusions.<\/p>\n

Keywords:<\/em><\/strong> Acacia mangium, Acacia auriculiformis, <\/em>Acacia hybrid, planting density, Quang Ninh province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>THI\u1ebeT L\u1eacP \u0110\u1ed2NG TH\u1edcI H\u1ec6 TH\u1ed0NG M\u00d4 H\u00ccNH \u0110\u1ec2
\nC\u1ea2I THI\u1ec6N \u0110\u1ed8 TIN C\u1eacY TRONG \u01af\u1edaC T\u00cdNH SINH KH\u1ed0I – CARBON C\u1ee6A C\u00c1C B\u1ed8 PH\u1eacN C\u00c2Y B\u1edcI L\u1edcI \u0110\u1ece (Machilus odoratissimus<\/em> Nees) \u1ede T\u00c2Y NGUY\u00caN<\/p>\n

<\/a>Tri\u1ec7u Th\u1ecb L\u1eafng, B\u1ea3o Huy<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u1eddi l\u1eddi \u0111\u1ecf (Machilus odoratissimus <\/em>Nees) <\/em>l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y \u0111a m\u1ee5c \u0111\u00edch v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf, b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng cao. Trong kinh doanh r\u1eebng tr\u1ed3ng B\u1eddi l\u1eddi \u0111\u1ecf, c\u1ea7n c\u00f3 h\u1ec7 th\u1ed1ng m\u00f4 h\u00ecnh \u01b0\u1edbc t\u00ednh ch\u00ednh x\u00e1c sinh kh\u1ed1i t\u1eebng b\u1ed9 ph\u1eadn c\u00e2y; \u0111\u1ed3ng th\u1eddi \u0111\u1ec3 t\u00ednh to\u00e1n carbon t\u00edch l\u0169y c\u1ee7a c\u00e2y r\u1eebng cho c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh gi\u1ea3m ph\u00e1t th\u1ea3i t\u1eeb m\u1ea5t v\u00e0 suy tho\u00e1i r\u1eebng. Nghi\u00ean c\u1ee9u n\u00e0y th\u1ef1c hi\u1ec7n \u1edf T\u00e2y Nguy\u00ean, 22 \u00f4 m\u1eabu 300 m2<\/sup> \u0111\u01b0\u1ee3c l\u1eadp \u1edf c\u00e1c tu\u1ed5i t\u1eeb 1 – 7. Ch\u1eb7t h\u1ea1 22 c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n l\u00e2m ph\u1ea7n \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u sinh kh\u1ed1i\/carbon c\u1ee7a b\u1ed1n b\u1ed9 ph\u1eadn c\u00e2y l\u00e0 th\u00e2n (Bst\/Cst), v\u1ecf (Bba\/Cba), c\u00e0nh (Bbr\/Cbr), l\u00e1 (Ble\/Cle) v\u00e0 t\u1ed5ng sinh kh\u1ed1i\/carbon c\u1ee7a c\u00e2y tr\u00ean m\u1eb7t \u0111\u1ea5t (AGB\/AGC). So s\u00e1nh hai ph\u01b0\u01a1ng ph\u00e1p thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh: Thi\u1ebft l\u1eadp \u0111\u1ed9c l\u1eadp c\u00e1c m\u00f4 h\u00ecnh b\u1ed9 ph\u1eadn theo phi tuy\u1ebfn c\u00f3 tr\u1ecdng s\u1ed1 Maximum Likelihood; v\u00e0 thi\u1ebft l\u1eadp \u0111\u1ed3ng th\u1eddi c\u00e1c m\u00f4 h\u00ecnh b\u1ed9 ph\u1eadn theo phi tuy\u1ebfn c\u00f3 tr\u1ecdng s\u1ed1 SUR (seemingly unrelated regression). K\u1ebft qu\u1ea3 cho th\u1ea5y thi\u1ebft l\u1eadp \u0111\u1ed3ng th\u1eddi h\u1ec7 th\u1ed1ng c\u00e1c m\u00f4 h\u00ecnh sinh kh\u1ed1i – carbon b\u1ed9 ph\u1eadn v\u00e0 to\u00e0n b\u1ed9 theo SUR \u0111\u1ea1t \u0111\u1ed9 tin c\u1eady cao h\u01a1n c\u00e1c m\u00f4 h\u00ecnh b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp. H\u1ec7 th\u1ed1ng m\u00f4 h\u00ecnh \u01b0\u1edbc t\u00ednh \u0111\u1ed3ng th\u1eddi sinh kh\u1ed1i v\u00e0 carbon c\u00e1c b\u1ed9 ph\u1eadn c\u00e2y B\u1eddi l\u1eddi \u0111\u1ecf v\u00e0 to\u00e0n b\u1ed9 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn c\u00f3 d\u1ea1ng t\u1ed5ng qu\u00e1t: AGB = Bst + Bba+ Bbr + Ble = a1<\/sub>\u00d7(D2<\/sup>H)b1<\/sup> + a2<\/sub>\u00d7(D2<\/sup>H)b2 <\/sup>+ a3<\/sub>\u00d7Db3<\/sup> + a4<\/sub>\u00d7(D2<\/sup>H)b4<\/sup> <\/em>v\u00e0 AGC = Cst + Cba+ Cbr + Cle = a1<\/sub>\u00d7(D2<\/sup>H)b1<\/sup> + a2<\/sub>\u00d7(D2<\/sup>H)b2 <\/sup>+ a3<\/sub>\u00d7Db3<\/sup> + a4<\/sub>\u00d7(D2<\/sup>H)b4<\/sup>.<\/em><\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1eddi l\u1eddi \u0111\u1ecf, carbon, sinh kh\u1ed1i, seemingly unrelated regression (SUR)<\/td>\n<\/tr>\n

\n

<\/a>Developing simultaneously modeling systems for improving reliability of tree aboveground biomass – carbon and its components estimates for Machilus odoratissimus <\/em>Nees in the Central Highlands of Viet Nam<\/strong><\/p>\n

Machilus odoratissimus <\/em>Nees is a species of multi – purposes, hight economic value and environmental protection. In plantation business, it demands modeling system that predicts accurately aboveground biomass and its components; At the same time, the developed models support to compute carbon accumulation of forest trees for program of reducing emissions from deforestation and forest degradation. Twenty – two 300 m2<\/sup> plots within the full range of 1 – 7 ages in the Central Highlands were measured. A total of 22 averaged – diameter trees were destructively sampled to obtain a dataset of the dry biomass\/carbon of the stem (Bst\/Cst), bark (Bba\/Cba), branches (Bbr\/Cbr), leaves (Ble\/Cle), and total aboveground biomass\/carbon (AGB\/AGC). The study compared two methods: developing independent equations was weighted nonlinear regression fit by maximum likelihood and building simultaneous modeling system was weighted nonlinear fit by seemingly unrelated regression (SUR). As a result, the modeling system devloped simultaneously using SUR produced higher reliability than the models established independently. The selected forms of modeling systems for estimating tree aboveground biomass\/carbon and its components were AGB = Bst + Bba+ Bbr + Ble = a1<\/sub>\u00d7(D2<\/sup>H)b1<\/sup> + a2<\/sub>\u00d7(D2<\/sup>H)b2 <\/sup>+ a3<\/sub>\u00d7Db3<\/sup> + a4<\/sub>\u00d7(D2<\/sup>H)b4<\/sup> <\/em>and AGC = Cst + Cba+ Cbr + Cle = a1<\/sub>\u00d7(D2<\/sup>H)b1<\/sup> + a2<\/sub>\u00d7(D2<\/sup>H)b2 <\/sup>+ a3<\/sub>\u00d7Db3<\/sup> + a4<\/sub>\u00d7(D2<\/sup>H)b4<\/sup>.<\/em><\/p>\n

Keywords:<\/em><\/strong> Machilus odoratissimus<\/em>, biomass, carbon, seemingly unrelated regression (SUR)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U THI\u1ebeT L\u1eacP B\u1ea2N \u0110\u1ed2 PH\u00c2N B\u1ed0 R\u1eeaNG NG\u1eacP M\u1eb6N T\u1ea0I VI\u1ec6T NAM S\u1eec D\u1ee4NG \u1ea2NH LANDSAT 8 OLI V\u00c0 SENTINEL 1 \u0110A TH\u1edcI GIAN TR\u00caN N\u1ec0N T\u1ea2NG \u0110I\u1ec6N TO\u00c1N \u0110\u00c1M M\u00c2Y\u00a0C\u1ee6A GOOGLE EARTH ENGINE<\/p>\n

<\/a>Ph\u1ea1m V\u0103n Du\u1ea9n1<\/sup>, L\u00ea S\u1ef9 Doanh1<\/sup>, V\u0169 Th\u1ecb Th\u00ecn1<\/sup>, Ho\u00e0ng V\u0103n Khi\u00ean1<\/sup>, Ph\u1ea1m Th\u1ecb Qu\u1ef3nh2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Sinh th\u00e1i r\u1eebng v\u00e0 M\u00f4i tr\u01b0\u1eddng – Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n2Khoa L\u00e2m h\u1ecdc – Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Do s\u1ef1 t\u00e1c \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi v\u00e0 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, b\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 r\u1eebng ng\u1eadp m\u1eb7n ch\u00ednh x\u00e1c v\u00e0 c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean r\u1ea5t c\u1ea7n thi\u1ebft ph\u1ee5c v\u1ee5 c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd, b\u1ea3o v\u1ec7 v\u00e0 x\u00e2y d\u1ef1ng c\u00e1c k\u1ebf ho\u1ea1ch qu\u1ea3n l\u00fd b\u1ec1n v\u1eefng. Trong nghi\u00ean c\u1ee9u n\u00e0y, m\u1ed9t thu\u1eadt to\u00e1n ph\u00e2n lo\u1ea1i \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c \u0111\u1eb7c t\u00ednh sinh th\u00e1i \u0111\u1ed9c \u0111\u00e1o c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n \u1edf Vi\u1ec7t Nam. C\u1ee5 th\u1ec3, b\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 r\u1eebng ng\u1eadp m\u1eb7n \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng th\u00f4ng qua: (1) t\u1ea7n s\u1ed1 \u0111\u1ed9 xanh; (2) t\u1ea7n s\u1ed1 \u0111\u1ed9 che ph\u1ee7 t\u00e1n; (3) t\u1ea7n s\u1ed1 \u0111\u1ed9 ng\u1eadp tri\u1ec1u x\u00e1c \u0111\u1ecbnh t\u1eeb t\u01b0 li\u1ec7u \u1ea3nh Landsat 8 OLI \u0111a th\u1eddi gian k\u1ebft h\u1ee3p v\u1edbi m\u1ed9t s\u1ed1 d\u1eef li\u1ec7u ph\u1ee5 tr\u1ee3 kh\u00e1c. Ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt kh\u00e1c bi\u1ec7t chu\u1ea9n ho\u00e1 (NDVI) trung b\u00ecnh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 m\u1ed9t bi\u1ebfn quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c ng\u01b0\u1ee1ng t\u1ea7n s\u1ed1 \u0111\u1ed9 xanh, t\u1ea7n s\u1ed1 \u0111\u1ed9 che ph\u1ee7 t\u00e1n, t\u1ea7n s\u1ed1 \u0111\u1ed9 ng\u1eadp tri\u1ec1u ph\u00f9 h\u1ee3p \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh khu v\u1ef1c c\u00f3 ph\u00e2n b\u1ed1 r\u1eebng ng\u1eadp m\u1eb7n. Ngo\u00e0i ra, s\u1ef1 t\u00edch h\u1ee3p c\u1ee7a k\u00eanh VH tr\u00ean \u1ea3nh Sentinel – 1 v\u00e0 ch\u1ec9 s\u1ed1 n\u01b0\u1edbc kh\u00e1c bi\u1ec7t bi\u1ebfn \u0111\u1ed5i (mNDWI) cho th\u1ea5y ti\u1ec1m n\u0103ng l\u1edbn trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c khu v\u1ef1c li\u00ean t\u1ee5c ng\u1eadp n\u01b0\u1edbc trong n\u0103m kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n b\u1ed1 r\u1eebng ng\u1eadp m\u1eb7n. B\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 r\u1eebng ng\u1eadp m\u1eb7n t\u1ea1o ra \u1edf \u0111\u1ed9 ph\u00e2n gi\u1ea3i kh\u00f4ng gian 30 m c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c t\u1ed5ng th\u1ec3 l\u1edbn h\u01a1n 93% khi ki\u1ec3m ch\u1ee9ng th\u1ef1c t\u1ebf. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 ch\u1ee9ng minh ti\u1ec1m n\u0103ng c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng t\u01b0 li\u1ec7u \u1ea3nh Landsat 8 OLI v\u00e0 Sentinel – 1 \u0111a th\u1eddi gian tr\u00ean n\u1ec1n t\u1ea3ng \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y c\u1ee7a GEE \u0111\u1ec3 x\u00e1c l\u1eadp b\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 r\u1eebng ng\u1eadp m\u1eb7n t\u1ea1i c\u00e1c v\u00f9ng ven bi\u1ec3n \u1edf Vi\u1ec7t Nam.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Google earth engine, r\u1eebng ng\u1eadp m\u1eb7n, t\u1ea7n s\u1ed1 \u0111\u1ed9 che ph\u1ee7 t\u00e1n, t\u1ea7n s\u1ed1 \u0111\u1ed9 ng\u1eadp tri\u1ec1u, t\u1ea7n s\u1ed1 \u0111\u1ed9 xanh<\/td>\n<\/tr>\n

\n

<\/a>Reserch to establis mangrove forests map in Viet Nam using time series Landsat 8 Oli and Sentinel – 1 in google earth engine cloud computing platform<\/strong><\/p>\n

Due to anthropogenis disturbances and climate change, accurate and contemporary maps of mangrove forests are needed to management, protection and establish plans for sustainable management. In this study, a classification algorithm was developed using the biophysical characteristics of mangrove forests in Viet Nam. Specifically, mangrove forests distribution maps were mapped by: (1) Greeness frequency; (2) Canopy frequency; (3) Inundation frequency from time series Landsat 8 OLI and some other datas: elevation, slop… The annual mean Normalized Difference Vegetation Index (NDVI) was found to be a key variable in determining the classification thresholds of Greeness frequency, Canopy frequency, Inundation frequency to determined areas mangrove forests distribution. In addition, the intergration of Sentinel 1 VH band and modified Normalized Difference Water Index (mNDWI) shows great potential in identifying yearlong tidal and fresth water bodies, which can not distribute of mangrove forests. Mangrove forests distribution maps were mapped at 30 m spatial resolution have accuracy greater than 93% when validated with ground reference data. This study has demonstrated the potential of using time series Landsat 8 OLI and Sentinel – 1 imagery in Google earth engine cloud computing platform to identify and map mangrove forests along the coastal zones in Viet Nam.<\/p>\n

Keywords:<\/em><\/strong> GEE, mangrove forests, canopy frequency, inundation frequency, greeness frequency<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 HI\u1ec6U QU\u1ea2 KINH T\u1ebe M\u1ed8T S\u1ed0 M\u00d4 H\u00ccNH TR\u1ed2NG TR\u00d4M T\u1ea0I V\u00d9NG KH\u00d4 H\u1ea0N NAM TRUNG B\u1ed8<\/p>\n

<\/a>Ph\u00f9ng V\u0103n Khang, Ng\u00f4 V\u0103n Ng\u1ecdc, Ph\u00f9ng V\u0103n Khen, V\u00f5 Trung Ki\u00ean,
\nPh\u00f9ng V\u0103n T\u1ec9nh, Nguy\u1ec5n Tr\u1ecdng Nam<\/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\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 kinh t\u1ebf m\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00f4m t\u1ea1i v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung b\u1ed9 l\u00e0 m\u1ed9t ph\u1ea7n m\u1ee5c trong \u0111\u1ec1 t\u00e0i \u201cNghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng, k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng v\u00e0 khai th\u00e1c m\u1ee7 Tr\u00f4m (Sterculia foetida<\/em> L.) \u1edf v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung b\u1ed9\u201d th\u1ef1c hi\u1ec7n t\u1eeb n\u0103m 2013 \u0111\u1ebfn n\u0103m 2018. S\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p t\u1eeb \u0111i\u1ec1u tra c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00f4m c\u1ee7a c\u00e1c h\u1ed9 gia \u0111\u00ecnh tr\u00ean \u0111\u1ecba b\u00e0n huy\u1ec7n Tuy Phong (B\u00ecnh Thu\u1eadn) v\u00e0 huy\u1ec7n Ninh Ph\u01b0\u1edbc, Thu\u1eadn Nam (Ninh Thu\u1eadn). K\u1ebft qu\u1ea3 v\u1ec1 t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u00e1c m\u00f4 h\u00ecnh dao \u0111\u1ed9ng t\u1eeb 1,48 cm\/n\u0103m (MH7) \u0111\u1ebfn 2,98 cm\/n\u0103m (MH4), t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao t\u1eeb 0,25 m\/n\u0103m (MH7) \u0111\u1ebfn 1,0 m\/n\u0103m (MH3), t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh t\u00e1n t\u1eeb 0,21 m\/n\u0103m (MH7) v\u00e0 cao nh\u1ea5t m\u00f4 h\u00ecnh MH3, MH5 (0,72 m\/n\u0103m), t\u1ef7 l\u1ec7 s\u1ed1ng t\u01b0\u01a1ng \u0111\u1ed1i cao t\u1eeb 74,9% (MH7) \u0111\u1ebfn 98% (MH4). Ph\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 kinh t\u1ebf c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00f4m \u0111\u1ebfn n\u0103m th\u1ee9 10 \u0111\u00e3 ch\u1ec9 ra: M\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00f4m th\u00e2m canh (MH4) \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao nh\u1ea5t v\u1edbi c\u00e1c ch\u1ec9 ti\u00eau kinh t\u1ebf nh\u01b0 NPV \u2248 153 tri\u1ec7u \u0111\u1ed3ng\/ha; IRR \u2248 40%; BCR \u2248 2 l\u1ea7n v\u00e0 hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng lao \u0111\u1ed9ng \u0111\u1ea1t 463.000 \u0111\u1ed3ng\/ng\u00e0y c\u00f4ng. C\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng xen c\u00e2y n\u00f4ng nghi\u1ec7p trong 02 n\u0103m \u0111\u1ea7u v\u1edbi m\u1eadt \u0111\u1ed9 tr\u1ed3ng 833 c\u00e2y\/ha (MH5) c\u0169ng cho hi\u1ec7u qu\u1ea3 kinh t\u1ebf kh\u00e1 cao v\u1edbi c\u00e1c ch\u1ec9 ti\u00eau NPV \u2248 96,7 – 99,8 tri\u1ec7u \u0111\u1ed3ng\/ha; IRR \u2248 43 – 53%; BCR \u2248 1,8 l\u1ea7n v\u00e0 hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng lao \u0111\u1ed9ng \u0111\u1ea1t 390.000 – 416.000 \u0111\u1ed3ng\/ng\u00e0y c\u00f4ng. Hi\u1ec7u qu\u1ea3 kinh t\u1ebf k\u00e9m nh\u1ea5t l\u00e0 m\u00f4 h\u00ecnh tr\u1ed3ng v\u1edbi m\u1eadt \u0111\u1ed9 2.500 c\u00e2y\/ha (MH1) v\u1edbi hi\u1ec7u qu\u1ea3 ng\u00e0y c\u00f4ng lao \u0111\u1ed9ng th\u1ea5p (269.000 \u0111\u1ed3ng\/ng\u00e0y) v\u00e0 doanh thu c\u0169ng s\u1ee5t gi\u1ea3m nhanh, \u0111\u1ebfn n\u0103m th\u1ee9 10 doanh thu ch\u1ec9 c\u00f2n 20 tri\u1ec7u\/ha\/n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> M\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00f4m, Tr\u00f4m, Sterculia foetida<\/em> L., Nam Trrung b\u1ed9, hi\u1ec7u qu\u1ea3 kinh t\u1ebf<\/td>\n<\/tr>\n

\n

<\/a>Economic efficiency assessment from some\u00a0Trom (Sterculia foetida\u00a0<\/em>L.) plantation\u00a0experiment models in the dry zone at South of Central Viet Na<\/strong><\/p>\n

Research in economic efficiency assessment from some\u00a0Trom (Sterculia foetida <\/em>L.) plantation\u00a0experiment models in the dry zone at South of Central Viet Nam was a sub – content in a whole batch research topic \u201cResearch in breed selection, plantation technical and harvesting\u00a0Sterculia foetida<\/em> L. latex in the dry zone at South of Central Viet Nam\u201d from 2013 to 2018. The data was collected from\u00a0Sterculia foetida <\/em>L. plantation experiment models in smallholders on Tuy Phong district, Binh Thuan province, and Ninh Phuoc, Thuan Nam district, Ninh Thuan province. The result on diameter growth has the range from 1,48 cm\/year in MH7 to 2.98 cm\/year in MH4. For height\u00a0growth has the range from 0,25 m\/year in MH7 to 1 m\/year in MH3. For canopy\u2019s diameter growth has the range from 0.21 m\/year (MH7) to 0.72 m\/year in MH3 and MH5. Survival rate was high from 74.9% in MH7 to 98% in MH4. Economic efficiency assessment\u00a0from Trom (Sterculia foetida <\/em>L.<\/em>) plantation\u00a0experiment models up to\u00a010 – year – old\u00a0show: the intensive Trom (Sterculia foetida <\/em>L.) plantation experiment model (MH4) has the highest efficiency\u00a0with economic indicators show NPV \u2248 153 million VND\/year,
\nIRR \u2248 40%, BCR \u2248 2 times and labor\u00a0efficiency got 463.000 VND\/day. In agricultural trees (corn, bean) intercropping with Trom (Sterculia foetida <\/em>L.) in the first 2 – year model,\u00a0the density was 833 trees\/hectare (MH5) also show the high economic efficiency with some indicators such as NPV \u2248 96.7 – 99.8 million VND\/year, IRR \u2248 43 – 53%,\u00a0BCR \u2248 1.8 times and labor\u00a0efficiency got 463.000 VND\/day. The plantation experiment model with the density 2.500 trees\/hectare (MH1) was less economic efficiency model with\u00a0labor\u00a0efficiency got only 269.000 VND\/day and the revenue also dropped rapidly, at the 10th year the revenue will get only 20 million \/ hectare\/year.<\/p>\n

Keywords:<\/em><\/strong> Trom plantation experiment models, Trom, Sterculia foetida<\/em> L., South of Central Viet Nam, economic efficiency<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M 3 LO\u00c0I TRE
\nL\u00c0M NGUY\u00caN LI\u1ec6U CHO S\u1ea2N XU\u1ea4T TRE \u00c9P KH\u1ed0I<\/p>\n

<\/a>Nguy\u1ec5n Quang Trung, Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, Nguy\u1ec5n Th\u1ecb Mi\u1ec1n<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u0110\u1eb7c \u0111i\u1ec3m ngo\u1ea1i quan, t\u00ednh ch\u1ea5t c\u01a1 l\u00fd, h\u00f3a h\u1ecdc c\u1ee7a Lu\u1ed3ng (Dendrocalamus barbatus<\/em> Hsueh et D.Z.Li), Tre ng\u1ecdt, V\u1ea7u (Idosasa angustata<\/em> McClure) xu\u1ea5t tre \u00e9p kh\u1ed1i cho th\u1ea5y: c\u1ea3 3 lo\u00e0i tre \u0111\u1ec1u l\u00e0 c\u00e1c lo\u00e0i tre th\u00e2n l\u1edbn, \u0111\u1ed9 tr\u00f2n \u0111\u1ec1u cao. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch t\u1eeb 0,586 g\/cm3<\/sup>~ 0,613 g\/cm3<\/sup>; \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh t\u1eeb 138,90 N\/mm2<\/sup>~158,88 N\/mm2<\/sup>; \u0111\u1ed9 pH c\u1ee7a 3 lo\u00e0i tre t\u1eeb 5,3 ~5,62 l\u00e0 nh\u1eefng lo\u00e0i tre c\u00f3 t\u00ednh axit nh\u1eb9, h\u00e0m l\u01b0\u1ee3ng xenlulo cao x\u1ea5p x\u1ec9 40% l\u00e0 y\u1ebfu t\u1ed1 t\u0103ng \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean c\u1ee7a tre, h\u00e0m l\u01b0\u1ee3ng lignin cao x\u1ea5p x\u1ec9 25% g\u00f3p ph\u1ea7n gi\u00fap tre ch\u1ecbu nhi\u1ec7t t\u1ed1t v\u00e0 t\u0103ng \u0111\u1ed9 c\u1ee9ng c\u1ee7a tre. C\u1ea3 3 lo\u00e0i tre \u0111\u1ec1u th\u00edch h\u1ee3p l\u00e0m nguy\u00ean li\u1ec7u cho s\u1ea3n xu\u1ea5t tre \u00e9p kh\u1ed1i.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Lu\u1ed3ng, Tre ng\u1ecdt, V\u1ea7u \u0111\u1eafng<\/td>\n<\/tr>\n

\n

<\/a>The properties of 3 bamboo species using as raw material for pressed bamboo products<\/strong><\/p>\n

The bonded characteristics, physical and chemical properties of Luong, Sweet Bamboo and Bitter Melon have been studied to assess the ability of materials to produce pressed bamboo. The results showed that all 3 bamboo species are big bamboo species with high roundness. Volumetric volume from 0.586 g\/cm3<\/sup> ~ 0.613 g\/cm3<\/sup>; static bending strength from 138.90 N\/mm2<\/sup> ~ 158.88 N\/mm2<\/sup>; pH of 3 bamboo species from 5.3 ~ 5.62 is mild acidic bamboo species, high cellulose content is approximately 40%, which is the element of increasing the mechanical strength and natural durability of bamboo, lignin content. Approximately 25% high contributes to good heat – resistant bamboo and increases the hardness of bamboo. All 3 species of bamboo are suitable as raw materials for the production of pressed bamboo.<\/p>\n

Keywords:<\/em><\/strong> Luong, Sweet bamboo, Indosasa angustata<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 KH\u1ea2 N\u0102NG S\u1eec D\u1ee4NG G\u1ed6 C\u00c2Y B\u1edcI L\u1edcI V\u00c0NG
\n(Litsea pierrei<\/em> Lecomte)<\/p>\n

<\/a>V\u00f5 \u0110\u1ea1i H\u1ea3i1<\/sup>, Nguy\u1ec5n T\u1eed Kim2<\/sup>, B\u00f9i H\u1eefu Th\u01b0\u1edfng2<\/sup>,
\nNguy\u1ec5n Th\u1ecb Tr\u1ecbnh2<\/sup>, Nguy\u1ec5n Tr\u1ecdng Ngh\u0129a2<\/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

B\u1eddi l\u1eddi v\u00e0ng (Litsea pierrei<\/em> Lecomte) l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn sinh tr\u01b0\u1edfng nhanh, th\u00edch \u1ee9ng v\u1edbi nhi\u1ec1u v\u00f9ng sinh th\u00e1i kh\u00e1c nhau \u1edf Vi\u1ec7t Nam. G\u1ed7 m\u1ec1m, m\u1ecbn v\u00e0 th\u1edb th\u1eb3ng, m\u1ea1ch g\u1ed7 ph\u00e2n t\u00e1n, s\u1ed1 l\u01b0\u1ee3ng m\u1ea1ch \u00edt (5 – 8 m\u1ea1ch\/mm2<\/sup>), \u0111\u01b0\u1eddng k\u00ednh m\u1ea1ch trung b\u00ecnh (148 \u00b5m); tia g\u1ed7 th\u01b0\u1eddng r\u1ed9ng t\u1eeb m\u1ed9t \u0111\u1ebfn hai t\u1ebf b\u00e0o. G\u1ed7 co r\u00fat \u00edt (t\u1ed5ng \u0111\u1ed9 co r\u00fat tuy\u1ebfn t\u00ednh ph\u01b0\u01a1ng ti\u1ebfp tuy\u1ebfn 7,6%, xuy\u00ean t\u00e2m 4,9% v\u00e0 th\u1ec3 t\u00edch 13,7%). G\u1ed7 B\u1eddi l\u1eddi v\u00e0ng c\u00f3 t\u00ednh c\u01a1 h\u1ecdc th\u1ea5p (\u0111\u1ed9 b\u1ec1n n\u00e9n d\u1ecdc th\u1edb 38,8 MPa, k\u00e9o d\u1ecdc th\u1edb 112,4 MPa, u\u1ed1n t\u0129nh 69,6 MPa, u\u1ed1n va \u0111\u1eadp 37,5 kJ\/m2<\/sup>, \u0111\u1ed9 b\u1ec1n t\u00e1ch d\u1ecdc th\u1edb 16,5 N\/mm, m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i u\u1ed1n t\u0129nh 5,2 Gpa). V\u1edbi nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 c\u01a1 h\u1ecdc, g\u1ed7 B\u1eddi l\u1eddi v\u00e0ng c\u00f3 kh\u1ea3 n\u0103ng \u00edt cong v\u00eanh, n\u1ee9t n\u1ebb trong qu\u00e1 tr\u00ecnh s\u1ea5y, d\u1ec5 gia c\u00f4ng, ph\u00f9 h\u1ee3p l\u00e0m v\u00e1n b\u00f3c v\u00e0 v\u00e1n l\u1ea1ng, v\u00e1n gh\u00e9p thanh v\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ed3 g\u1ed7 n\u1ed9i th\u1ea5t. G\u1ed7 kh\u00f4ng th\u00edch h\u1ee3p s\u1eed d\u1ee5ng trong x\u00e2y d\u1ef1ng v\u00e0 giao th\u00f4ng v\u1eadn t\u1ea3i c\u1ea7n ch\u1ecbu l\u1ef1c cao.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1eddi l\u1eddi v\u00e0ng, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, s\u1eed d\u1ee5ng g\u1ed7<\/td>\n<\/tr>\n

\n

<\/a>Assessment of the possibility in wood utilization of Litsea pierrei<\/em> Lecomte<\/strong><\/p>\n

Litsea pierrei<\/em> Lecomte is a large tree species growing fast, adapting to many different ecological regions in Vietnam. Soft wood, smooth and straight grain, Wood diffuse – porous, 5 – 8 Vessels per square millimeter with mean tangential diameter of 148 \u00b5m; ray width 1 to 3 cells. Small wood shrinkage (total shrinkage in tangential direstion 7.6%, in radial direction 4.9% and volume of 13.7%). Litsea pierrei<\/em> wood has low mechanical strength (compression parallel to grain: 38.8 MPa, tension parallel\u00a0to the\u00a0grain: 112.4 MPa, static bending: 69.6 MPa, impact strength: 37.5 kJ \/ m2<\/sup>, cleavage parallel to grain: 16.5 N \/ mm, modulus of elastic: 5.2 GPa). With structural features, physical and mechanical properties mention above, Litsea pierrei<\/em> wood has the ability to be less warped, cracked during drying process, easy to process, suitable for veneer, blockboards and wooden furniture. Wood is not suitable for use in construction and transportation needs a high load.<\/p>\n

Keywords:<\/em><\/strong> Litsea pierrei <\/em>Lecomte, wood physical properties, wood machenical properties, wood utilization<\/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 1 – 2019 1. Nghi\u00ean c\u1ee9u \u0111a d\u1ea1ng c\u00e2y thu\u1ed1c\u00a0 thu\u1ed9c ng\u00e0nh M\u1ed9c lan (Magnoliophyta)\u00a0 t\u1ea1i v\u01b0\u1eddn qu\u1ed1c gia Phia O\u1eafc – Phia \u0110\u00e9n, t\u1ec9nh Cao B\u1eb1ng Study on diversity of medicinal plants of Magnoliophyta in Phia Oac – Phia Den National Park, Cao Bang province Tr\u1ea7n V\u0103n […]<\/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\/1618"}],"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=1618"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1618\/revisions"}],"predecessor-version":[{"id":1700,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1618\/revisions\/1700"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}