{"id":1749,"date":"2020-03-09T15:24:40","date_gmt":"2020-03-09T08:24:40","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1749"},"modified":"2023-11-23T12:25:28","modified_gmt":"2023-11-23T05:25:28","slug":"vietnam-journal-of-forest-science-number-4-2019","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2020\/03\/vietnam-journal-of-forest-science-number-4-2019\/","title":{"rendered":"Vietnam Journal of Forest Science Number 4-2019"},"content":{"rendered":"

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

<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 4<\/strong> – <\/strong>201<\/strong>9<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\n\u0110a d\u1ea1ng lo\u00e0i trong chi Lasianthus Jack<\/em> (Rubiaceae) \u1edf Khu B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean H\u00f2n B\u00e0 v\u1edbi ghi nh\u1eadn m\u1edbi m\u1ed9t lo\u00e0i cho h\u1ec7 th\u1ef1c v\u1eadt Vi\u1ec7t Nam<\/td>\nDiversity of genus Lasianthus Jack<\/em> (Rubiaceae) from Hon Ba Nature Reserve with one new records for the flora of Vietnam<\/td>\n\u0110\u1eb7ng V\u0103n S\u01a1n
\nHo\u00e0ng Th\u1ecb B\u1ea3o Ng\u00e2n
\nPh\u1ea1m V\u0103n Ng\u1ecdt
\nNguy\u1ec5n Th\u1ecb Mai H\u01b0\u01a1ng
\nTr\u01b0\u01a1ng B\u00e1 V\u01b0\u01a1ng
\nNguy\u1ec5n V\u0103n T\u00fa
\nHo\u00e0ng Ngh\u0129a S\u01a1n
\nAkiyo Naiki<\/td>\n		3<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 m\u1eadt \u0111\u1ed9, s\u1ef1 bi\u1ebfn \u0111\u1ed9ng v\u00e0 m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng t\u1edbi s\u1ef1 ph\u00e2n b\u1ed1 \u0111\u1ebfn qu\u1ea7n th\u1ec3 chim C\u00f4ng (Pavo muticus<\/em> imperator<\/em>) t\u1ea1i V\u01b0\u1eddn Qu\u1ed1c gia C\u00e1t Ti\u00ean<\/td>\nAssessing density dynamics and efects of environmental factors on the Java green peafowl (Pavo muticus imperator<\/em>) populations at
\nCat Tien National Park<\/td>\n		B\u1ea1ch Thanh H\u1ea3i
\nPh\u1ea1m V\u0103n Thu\u1ea5n Nguy\u1ec5n Tr\u1ea7n V\u1ef9<\/td>\n		13<\/td>\n<\/tr>\n
3.<\/td>\nTh\u00e0nh ph\u1ea7n lo\u00e0i thu\u1ed9c chi B\u00ecnh v\u00f4i (Stephania<\/em> Lour.) (Menispermaceae) trong h\u1ec7 th\u1ef1c v\u1eadt Vi\u1ec7t Nam<\/td>\nThe species of the genus Stephania<\/em> Lour. (Menispermaceae) in flora
\nof Vietnam<\/td>\n		Tr\u1ecbnh Th\u1ecb Ph\u00fac
\nV\u0169 Ti\u1ebfn Ch\u00ednh
\nTr\u1ea7n V\u0103n Ti\u1ebfn
\nN\u00f4ng V\u0103n Duy<\/td>\n		22<\/td>\n<\/tr>\n
4.<\/td>\n\u0110\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a c\u00e2y Xoay (Dialium cochinchinensis<\/em> Pierre) t\u1ea1i m\u1ed9t s\u1ed1 qu\u1ea7n th\u1ec3 t\u1ef1 nhi\u00ean<\/td>\nEvaluation of genetic diversity of some Dialium cochinchinesnis<\/em> natural populations in Vietnam<\/td>\nNguy\u1ec5n Th\u1ecb Huy\u1ec1n
\nH\u00e0 Th\u1ecb Huy\u1ec1n Ng\u1ecdc
\nL\u00ea Th\u1ecb Th\u1ee7y
\nTr\u1ea7n Th\u1ecb Thu H\u00e0
\nNguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e0
\nNg\u00f4 V\u0103n C\u1ea7m
\nPh\u1ea1m Ti\u1ebfn B\u1eb1ng
\nNguy\u1ec5n Nh\u01b0 Hi\u1ebfn
\nL\u00ea S\u01a1n<\/td>\n		36<\/td>\n<\/tr>\n
5.<\/td>\nNh\u00e2n gi\u1ed1ng in vitro<\/em> lo\u00e0i Lan ng\u1ecdc th\u1ea1ch hai m\u00e0u (Dendrobium crystallinum<\/em> var. Alba) t\u1eeb nu\u00f4i c\u1ea5y \u0111\u1ed1t gi\u1ea3 h\u00e0nh<\/td>\nIn vitro<\/em> micropropagation of Dendrobium crystallinum<\/em> var. Alba, originated from nodes of pseudobulb culture<\/td>\nTr\u1ea7n Th\u1ecb Ng\u1ecdc Lan
\nB\u00f9i V\u0103n Tr\u1ecdng<\/td>\n		44<\/td>\n<\/tr>\n
6.<\/td>\n\u0110\u00e1nh gi\u00e1 k\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m m\u1edf r\u1ed9ng c\u00e1c gi\u1ed1ng keo lai, Keo l\u00e1 tr\u00e0m t\u1ea1i Qu\u1ea3ng Tr\u1ecb<\/td>\nEvaluation of intensive test results of acacia hybrid and Acacia auriculiformis<\/em> varieties<\/em> in Quang Tri<\/td>\nNguy\u1ec5n H\u1ea3i Th\u00e0nh
\nL\u00ea C\u00f4ng \u0110\u1ecbnh
\nV\u0169 \u0110\u1ee9c B\u00ecnh
\nH\u00e0 V\u0103n Thi\u1ec7n<\/td>\n		54<\/td>\n<\/tr>\n
7.<\/td>\n\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng c\u1ee7a m\u1ed9t s\u1ed1 gi\u1ed1ng keo \u0111ang \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn \u1edf v\u00f9ng \u0110\u00f4ng Nam B\u1ed9<\/td>\nEvaluation for the growth
\nof some acacia varieties common planted in the South Eastern Region<\/td>\n		Nguy\u1ec5n V\u0103n \u0110\u0103ng
\nV\u0169 \u0110\u00ecnh H\u01b0\u1edfng
\nNguy\u1ec5n Xu\u00e2n H\u1ea3i
\nKi\u1ec1u M\u1ea1nh H\u00e0
\nH\u1ed3 T\u1ed1 Vi\u1ec7t
\nTr\u1ea7n Thanh Tr\u0103ng<\/td>\n		61<\/td>\n<\/tr>\n
8.<\/td>\nNghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt
\ngi\u00e2m hom B\u1eddi l\u1eddi v\u00e0ng (Litsea pierrei<\/em> Lecomte)<\/td>\n		Propagation results of
\nLitsea pierrei<\/em> Lecomte
\nby cutting<\/td>\n		Nguy\u1ec5n Anh Tu\u1ea5n
\nPh\u00f9ng V\u0103n T\u1ec9nh
\nTr\u1ea7n V\u0103n S\u00e2m
\nV\u00f5 \u0110\u1ea1i H\u1ea3i<\/td>\n		69<\/td>\n<\/tr>\n
9.<\/td>\nNghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m h\u1ea1t gi\u1ed1ng, ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd v\u00e0 b\u1ea3o qu\u1ea3n h\u1ea1t Chi\u00eau li\u00eau n\u01b0\u1edbc (Terminalia calamansanai<\/em> Rolfe)<\/td>\nStudy on seed characteristics, treatment methods and storage methods of Terminalia calamansanai<\/em> Rolfe<\/td>\nNguy\u1ec5n Thanh Minh
\n\u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e0
\nPh\u00f9ng V\u0103n T\u1ec9nh<\/td>\n		78<\/td>\n<\/tr>\n
10.<\/td>\nK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e2y Xoan \u0111\u00e0o (Prunus arborea<\/em> Endle.) \u1edf c\u00e1c t\u1ec9nh ph\u00eda B\u1eafc<\/td>\nResearch result of some silvicultural charecteristics of Prunus arborea<\/em> Endle. Species in Northern provinces<\/td>\nNguy\u1ec5n Tr\u1ecdng \u0110i\u1ec3n
\nHo\u00e0ng V\u0103n Th\u1eafng
\nCao V\u0103n L\u1ea1ng<\/td>\n		86<\/td>\n<\/tr>\n
11.<\/td>\nTh\u1ef1c tr\u1ea1ng g\u00e2y tr\u1ed3ng B\u1ea7n kh\u00f4ng c\u00e1nh (Sonneratia apetala<\/em> Buch-Ham) \u1edf v\u00f9ng ven bi\u1ec3n B\u1eafc B\u1ed9 v\u00e0 B\u1eafc Trung B\u1ed9, Vi\u1ec7t Nam<\/td>\nCurrent situation of growing Sonneratia apetala<\/em>
\nBuch-Ham in Northern and North Central Coastal Regions in Vietnam<\/td>\n		L\u00ea V\u0103n Th\u00e0nh
\n\u0110\u1ed7 Th\u1ecb Kim Nhung
\nPh\u1ea1m Ng\u1ecdc Th\u00e0nh
\nTr\u1ea7n V\u0103n Cao
\nT\u1ea1 V\u0103n H\u00e2n
\nNguy\u1ec5n Kh\u1eafc Hi\u1ebfu
\nNguy\u1ec5n Xu\u00e2n \u0110\u00e0i<\/td>\n		96<\/td>\n<\/tr>\n
12.<\/td>\nNghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n t\u1edbi sinh tr\u01b0\u1edfng Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/em>) 4 n\u0103m tu\u1ed5i t\u1ea1i Tr\u1ea1m Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p T\u00e2n L\u1ea1c – H\u00f2a B\u00ecnh<\/td>\nResearch effect of fertilizer on the growth of Acacia mangium<\/em> in four years in
\nTan Lac forestry experience station, Hoa Binh province<\/td>\n		Ph\u1ea1m \u0110\u00f4n
\nL\u00ea V\u0103n Quang
\n\u0110\u00e0o Th\u1ecb Huy\u1ec1n<\/td>\n		105<\/td>\n<\/tr>\n
13.<\/td>\nNghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t l\u00fd, h\u00f3a h\u1ecdc \u0111\u1ea5t sau canh t\u00e1c n\u01b0\u01a1ng r\u1eaby t\u1ea1i x\u00e3 Chi\u1ec1ng S\u01a1n, huy\u1ec7n M\u1ed9c Ch\u00e2u, t\u1ec9nh S\u01a1n La<\/td>\nStudy on physical and chemical properties after shifting cultivation in Chieng Son commune, Moc Chau district, Son La province<\/td>\nNguy\u1ec5n Ho\u00e0ng H\u01b0\u01a1ng
\nTr\u1ea7n Th\u1ecb Nh\u00e2m
\nL\u00ea Th\u1ecb Khi\u1ebfu<\/td>\n		112<\/td>\n<\/tr>\n
14.<\/td>\nStructure and biodiversity in secondary forest, Central Kalimantan, Indonesia.<\/td>\nC\u1ea5u tr\u00fac v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc r\u1eebng th\u1ee9 sinh t\u1ea1i Trung t\u00e2m Kalimantan, Indonesia<\/td>\nNovelia Triana
\nBui Manh Hung
\nNisfiatul Hidayat<\/td>\n		119<\/td>\n<\/tr>\n
15.<\/td>\n\u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 \u0111\u1ed1i v\u1edbi d\u00f2ng keo lai BV10 v\u00e0 BV16 ph\u1ee5c v\u1ee5 cho y\u00eau c\u1ea7u g\u1ed7 x\u1ebb<\/td>\nEvaluation of the wood quality of acacia hybrid clones BV10 and BV16 used for wood joinery<\/td>\nNguy\u1ec5n B\u1ea3o Ng\u1ecdc
\nNguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng
\nNguy\u1ec5n V\u0103n \u0110\u1ecbnh
\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nHo\u00e0ng V\u0103n Phong
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/td>\n		134<\/td>\n<\/tr>\n
16.<\/td>\nD\u1ef1 b\u00e1o \u00e1p l\u1ef1c s\u1eed d\u1ee5ng \u0111\u1ea5t r\u1eebng c\u1ee7a c\u1ed9ng \u0111\u1ed3ng d\u00e2n c\u01b0 v\u00e0 gi\u1ea3i ph\u00e1p h\u00e0i h\u00f2a v\u1edbi ch\u1ee9c n\u0103ng r\u1eebng ph\u00f2ng h\u1ed9 Kr\u00f4ng N\u0103ng, T\u00e2y Nguy\u00ean<\/td>\nPressure forecast of forest land use from communities and solutions to harmonize with protection forest function in Krong Nang,
\nthe Central Highlands<\/td>\n		L\u00ea Minh Ti\u1ebfn
\nB\u1ea3o Huy<\/td>\n		141<\/td>\n<\/tr>\n
17.<\/td>\nNghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng t\u00edch l\u0169y carbon r\u1eebng V\u1ea7u \u0111\u1eafng (Indosasa angustata<\/em> Mc.Clure) t\u1ea1i t\u1ec9nh B\u1eafc K\u1ea1n<\/td>\nResearch on carbon sequestration of Indosasa angustata<\/em> Mc.Clure in Bac Kan province<\/td>\nNg\u00f4 Xu\u00e2n H\u1ea3i
\nV\u00f5 \u0110\u1ea1i H\u1ea3i<\/td>\n		153<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110A D\u1ea0NG LO\u00c0I TRONG CHI Lasianthus<\/em> Jack (Rubiaceae) \u1ede KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN H\u00d2N B\u00c0 V\u1edaI GHI NH\u1eacN M\u1edaI M\u1ed8T LO\u00c0I CHO H\u1ec6 TH\u1ef0C V\u1eacT VI\u1ec6T NAM<\/p>\n

<\/a>\u0110\u1eb7ng V\u0103n S\u01a1n1,3*<\/sup>, Ho\u00e0ng Th\u1ecb B\u1ea3o Ng\u00e2n2<\/sup>, Ph\u1ea1m V\u0103n Ng\u1ecdt2<\/sup>, Nguy\u1ec5n Th\u1ecb Mai H\u01b0\u01a1ng1<\/sup>, Tr\u01b0\u01a1ng B\u00e1 V\u01b0\u01a1ng1<\/sup>, Nguy\u1ec5n V\u0103n T\u00fa1<\/sup>, Ho\u00e0ng Ngh\u0129a S\u01a1n1<\/sup>, Akiyo Naiki3<\/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>Khoa Sinh h\u1ecdc, \u0110\u1ea1i h\u1ecdc S\u01b0 ph\u1ea1m Tp. H\u1ed3 Ch\u00ed Minh
\n3<\/sup>\u0110\u1ea1i h\u1ecdc Ryukyus, Nh\u1eadt B\u1ea3n<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Qua ph\u00e2n t\u00edch m\u1eabu ti\u00eau b\u1ea3n thu \u0111\u01b0\u1ee3c t\u1eeb n\u0103m 2013 – 2018 \u1edf Khu B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean H\u00f2n B\u00e0, t\u1ec9nh Kh\u00e1nh H\u00f2a \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c chi Lasianthus<\/em> Jack (X\u00fa h\u01b0\u01a1ng) c\u00f3 18 lo\u00e0i. Trong \u0111\u00f3, b\u1ed5 sung m\u1edbi m\u1ed9t lo\u00e0i
\nL. membranaceoideus<\/em> (X\u00fa h\u01b0\u01a1ng l\u00e1ng) v\u00e0 b\u1ed5 sung th\u00f4ng tin v\u1ec1 tr\u00e0ng hoa v\u00e0 qu\u1ea3 tr\u01b0\u1edfng th\u00e0nh m\u1ed9t lo\u00e0i L. stephanocalycinus<\/em> (X\u00fa h\u01b0\u01a1ng m\u1ecbn) cho h\u1ec7 th\u1ef1c v\u1eadt Vi\u1ec7t Nam. \u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i v\u00e0 \u1ea3nh ch\u1ee5p minh h\u1ecda v\u1ec1 hai lo\u00e0i n\u00e0y, c\u00f9ng v\u1edbi s\u1ef1 ph\u00e2n b\u1ed1 v\u00e0 kh\u00f3a ph\u00e2n lo\u1ea1i \u0111\u1ebfn lo\u00e0i trong chi Lasianthus<\/em> Jack \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u c\u0169ng \u0111\u01b0\u1ee3c cung c\u1ea5p.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ghi nh\u1eadn m\u1edbi, H\u00f2n B\u00e0, Kh\u00e1nh H\u00f2a, Lasianthus<\/em>, Rubiaceae<\/td>\n<\/tr>\n

\n

<\/a>Diversity of genus Lasianthus<\/em> Jack (Rubiaceae) from Hon Ba Nature Reserve with one new records for the flora of Vietnam<\/strong><\/p>\n

Based on the specimens collected from Hon Ba Nature Reseve of Khanh Hoa Province during 2013 – 2018, the total of eighteen species of genus Lasianthus<\/em> Jack were recorded. Among them, one new recorded species (L. membranaceoideus<\/em>) and corolla and mature fruit morphology of one species (L. stephanocalycinus<\/em>) were added for the flora of Vietnam. A detailed description and colour photographs of L. membranaceoideus<\/em> and L.<\/em> stephanocalycinus<\/em>, as well as the distribution and a key to the eighteen already known species are also provided.<\/p>\n

Keywords:<\/em><\/strong> Hon Ba, Khanh Hoa, Lasianthus<\/em>, new record, Rubiaceae<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u00c1NH GI\u00c1 M\u1eacT \u0110\u1ed8, S\u1ef0 BI\u1ebeN \u0110\u1ed8NG V\u00c0 M\u1ed8T S\u1ed0 Y\u1ebeU T\u1ed0 M\u00d4I TR\u01af\u1edcNG \u1ea2NH H\u01af\u1edeNG T\u1edaI S\u1ef0 PH\u00c2N B\u1ed0 \u0110\u1ebeN QU\u1ea6N TH\u1ec2 CHIM C\u00d4NG (Pavo muticus imperator<\/em>) T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA C\u00c1T TI\u00caN<\/p>\n

<\/a>B\u1ea1ch Thanh H\u1ea3i1<\/sup>, Ph\u1ea1m V\u0103n Thu\u1ea5n2<\/sup> Nguy\u1ec5n Tr\u1ea7n V\u1ef93<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m C\u1ee9u h\u1ed9 B\u1ea3o t\u1ed3n v\u00e0 Ph\u00e1t tri\u1ec3n sinh v\u1eadt – V\u01b0\u1eddn Qu\u1ed1c gia C\u00e1t Ti\u00ean
\n2<\/sup>Ph\u00f2ng Khoa h\u1ecdc v\u00e0 H\u1ee3p t\u00e1c qu\u1ed1c t\u1ebf – V\u01b0\u1eddn Qu\u1ed1c gia C\u00e1t Ti\u00ean
\n3<\/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<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u t\u1eadp trung \u1edf khu v\u1ef1c ph\u00eda Nam c\u1ee7a V\u01b0\u1eddn Qu\u1ed1c gia (VQG) C\u00e1t Ti\u00ean n\u01a1i \u0111\u01b0\u1ee3c xem l\u00e0 v\u00f9ng ph\u00e2n b\u1ed1 ch\u00ednh c\u1ee7a qu\u1ea7n th\u1ec3 lo\u00e0i chim C\u00f4ng. C\u00e1c khu v\u1ef1c ch\u00ednh \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u1ea3o s\u00e1t l\u00e0 sinh c\u1ea3nh tr\u1ea3ng c\u1ecf nh\u01b0 N\u00fai T\u01b0\u1ee3ng, C3 v\u00e0 B\u00e0u S\u1ea5u; v\u00e0 sinh c\u1ea3nh r\u1eebng th\u01b0\u1eddng xanh v\u00e0 b\u00e1n th\u01b0\u1eddng xanh. Ch\u00fang t\u00f4i s\u1eed d\u1ee5ng c\u00e1c tuy\u1ebfn, \u0111i\u1ec3m kh\u1ea3o s\u00e1t \u0111i\u1ec3n h\u00ecnh \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u v\u1ec1 m\u1eadt \u0111\u1ed9, sinh c\u1ea3nh s\u1eed d\u1ee5ng v\u00e0 s\u1ef1 \u1ea3nh h\u01b0\u1edfng c\u00e1c nh\u00e2n t\u1ed1 m\u00f4i tr\u01b0\u1eddng \u0111\u1ebfn qu\u1ea7n th\u1ec3 chim C\u00f4ng. K\u1ebft qu\u1ea3 kh\u1ea3o s\u00e1t cho th\u1ea5y chim C\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c ghi nh\u1eadn t\u1ea1i c\u00e1c sinh c\u1ea3nh tr\u1ea3ng c\u1ecf v\u1edbi m\u1eadt \u0111\u1ed9 trung b\u00ecnh l\u00e0 3,54 ti\u1ebfng k\u00eau\/km2<\/sup>. M\u1eadt \u0111\u1ed9 c\u1ee7a chim C\u00f4ng cao nh\u1ea5t l\u00e0 \u1edf tr\u1ea3ng c\u1ecf N\u00fai T\u01b0\u1ee3ng v\u00e0 tr\u1ea3ng c\u1ecf C3 v\u1edbi 3,86 ti\u1ebfng k\u00eau\/km2<\/sup>. M\u1eadt \u0111\u1ed9 qu\u1ea7n th\u1ec3 chim C\u00f4ng \u1edf VQG C\u00e1t Ti\u00ean hi\u1ec7n nay kh\u00e1 \u1ed5n \u0111\u1ecbnh v\u00e0 c\u00f3 xu h\u01b0\u1edbng t\u0103ng h\u01a1n so v\u1edbi th\u1eddi gian tr\u01b0\u1edbc \u0111\u00e2y. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch nhu c\u1ea7u sinh th\u00e1i v\u1ec1 m\u00f4i tr\u01b0\u1eddng s\u1ed1ng c\u1ee7a chim C\u00f4ng c\u0169ng cho th\u1ea5y r\u1eb1ng chim C\u00f4ng c\u00f3 xu h\u01b0\u1edbng ph\u00e2n b\u1ed1 \u1edf c\u00e1c sinh c\u1ea3nh tr\u1ea3ng c\u1ecf g\u1ea7n ngu\u1ed3n n\u01b0\u1edbc. Qua nghi\u00ean c\u1ee9u n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 cung c\u1ea5p m\u1ed9t k\u1ebft qu\u1ea3 mang t\u00ednh \u0111\u1ecbnh l\u01b0\u1ee3ng c\u00f3 \u00fd ngh\u0129a v\u1ec1 m\u1eb7t khoa h\u1ecdc nh\u1eb1m l\u00e0m c\u01a1 s\u1edf \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng c\u1ee7a qu\u1ea7n th\u1ec3 chim C\u00f4ng \u1edf VQG C\u00e1t Ti\u00ean c\u0169ng nh\u01b0 \u0111\u01b0a ra c\u00e1c k\u1ebf ho\u1ea1ch qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o t\u1ed3n qu\u1ea7n th\u1ec3 chim C\u00f4ng \u0111\u1ea1t hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t trong t\u01b0\u01a1ng lai.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Chim Tr\u0129, Pavo muticus imperator<\/em>, chim C\u00f4ng, V\u01b0\u1eddn Qu\u1ed1c gia C\u00e1t Ti\u00ean, b\u1ea3o t\u1ed3n<\/td>\n<\/tr>\n

Assessing density dynamics and efects of environmental factors on the Java green peafowl (Pavo muticus imperator<\/em>) populations at Cat Tien National Park<\/strong><\/p>\n

This study was conducted in Cat Tien National Park, focusing on the Southern part which is considered be the main distribution area of the Java Green Peafowl (Pavo muticus imperator)<\/em>. The main surveyed habitats were grassland in Nui Tuong, C3 and Bau Sau; and evergreen and semi-evergreen forest. We used line and point transects to investigate the density and analyze habitat selection and environmental factors effect their distribution. The results show that the Java Green Peafowl was recorded mainly in the grassland with an average density of 3.54 calls\/km2<\/sup>. The highest density was in Nui Tuong and C3 grassland 3.86 calls\/km2<\/sup>. The population of the Java Green Peafowl in Cat Tien National Park is currently quite stable and tends to increase compared to the past. The results of ecological habitat indicated that the Green Peafowl tends to be mainly distributed in grassland habitat near water sources. Through this study, we have provided a scientifical quantitative result as a basis for assessing the status of the Java Green Peafowl population in Cat Tien National Park as well as to help the Park\u2019s management board making the effective management plans and conservation strategy for the species in future.<\/p>\n

Keywords:<\/em><\/strong> Pheasant, Pavo muticus imperator, Java green peafowl<\/em>, Cat Tien National Park, conservation<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TH\u00c0NH PH\u1ea6N LO\u00c0I THU\u1ed8C CHI B\u00ccNH V\u00d4I (Stephania<\/em>\u00a0Lour.) (Menispermaceae) TRONG H\u1ec6 TH\u1ef0C V\u1eacT VI\u1ec6T NAM<\/p>\n

<\/a>Tr\u1ecbnh Th\u1ecb Ph\u00fac5<\/sup>, V\u0169 Ti\u1ebfn Ch\u00ednh1,2*<\/sup>, Tr\u1ea7n V\u0103n Ti\u1ebfn3<\/sup>, N\u00f4ng V\u0103n Duy4<\/sup><\/p>\n

1 <\/sup>B\u1ea3o T\u00e0ng Thi\u00ean Nhi\u00ean Vi\u1ec7t Nam, 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,
\n3 <\/sup>Khoa sinh h\u1ecdc, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t
\n4 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Khoa h\u1ecdc T\u00e2y Nguy\u00ean, Vi\u1ec7n H\u00e0n l\u00e2m Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 Vi\u1ec7t Nam
\n\u00a05<\/sup>Tr\u01b0\u1eddng trung h\u1ecdc ph\u1ed5 th\u00f4ng V\u0129nh L\u1ed9c, Thanh H\u00f3a<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Chi B\u00ecnh v\u00f4i (Stephania <\/em>Loureiro (598: 1790) l\u00e0 m\u1ed9t chi l\u1edbn trong h\u1ecd Ti\u1ebft d\u00ea (Menispermaceae) c\u00f3 kho\u1ea3ng 60 lo\u00e0i \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n tr\u00ean th\u1ebf gi\u1edbi. Chi n\u00e0y ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi v\u00e0 \u00e1 nhi\u1ec7t \u0111\u1edbi c\u1ee7a ch\u00e2u \u00c1 v\u00e0 ch\u00e2u Phi v\u1edbi trung t\u00e2m ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu \u1edf Nam Trung Qu\u1ed1c v\u00e0 Vi\u1ec7t Nam. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00f3 14 lo\u00e0i v\u00e0 1 th\u1ee9 \u0111\u01b0\u1ee3c ghi nh\u1eadn \u1edf Vi\u1ec7t Nam. Trong nghi\u00ean c\u1ee9u n\u00e0y, c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m d\u1ec5 nh\u1eadn bi\u1ebft cho c\u00e1c lo\u00e0i c\u0169ng \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 v\u00e0 h\u00ecnh \u1ea3nh c\u0169ng \u0111\u01b0\u1ee3c minh ho\u1ea1, \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc sinh th\u00e1i, m\u1eabu nghi\u00ean c\u1ee9u c\u0169ng \u0111\u01b0\u1ee3c ch\u1ec9 d\u1eabn.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Chi Stephania<\/em>, ph\u00e2n lo\u1ea1i, m\u00f4 t\u1ea3, Vi\u1ec7t Nam<\/td>\n<\/tr>\n

<\/a>The species of the genus Stephania<\/em>\u00a0Lour. (Menispermaceae) in flora of Vietnam<\/strong><\/p>\n

The genus Stephania <\/em>Loureiro (598: 1790) is the largest genus in the family Menispermaceae, with 60 species in the world. The genus mainly occurs in the tropical and subtropical regions of Asia and Africa with the center of diversity in Southern China and Vietnam (Nguyen 2003). Fourteen species of Stephania <\/em>have been recorded from Vietnam. In the course of carrying out a revision of Stephania <\/em>in Vietnam, we recognize fourteen species and one variety. In this paper, the morphological redescription and illustrations are provided along with notes on distribution, ecology, phenology and specimens examined of species.<\/p>\n

Keywords:<\/em><\/strong> Stephania<\/em>, taxonomy, description, Vietnam<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 \u0110A D\u1ea0NG DI TRUY\u1ec0N C\u1ee6A C\u00c2Y XOAY (Dialium cochinchinensis<\/em> Pierre) T\u1ea0I M\u1ed8T S\u1ed0 QU\u1ea6N TH\u1ec2 T\u1ef0 NHI\u00caN<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb Huy\u1ec1n1<\/sup>, H\u00e0 Th\u1ecb Huy\u1ec1n Ng\u1ecdc1<\/sup>, L\u00ea Th\u1ecb Th\u1ee7y1<\/sup>, Tr\u1ea7n Th\u1ecb Thu H\u00e01<\/sup>,
\nNguy\u1ec5n Th\u1ecb Vi\u1ec7t H\u00e01<\/sup>, Ng\u00f4 V\u0103n C\u1ea7m2<\/sup>, Ph\u1ea1m Ti\u1ebfn B\u1eb1ng2<\/sup>, Nguy\u1ec5n Nh\u01b0 Hi\u1ebfn2<\/sup>, L\u00ea S\u01a1n1*<\/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> Trung t\u00e2m L\u00e2m nghi\u1ec7p Nhi\u1ec7t \u0110\u1edbi – Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m nghi\u1ec7p Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nh\u1eb1m m\u1ee5c \u0111\u00edch nghi\u00ean c\u1ee9u b\u1ea3o t\u1ed3n, khai th\u00e1c v\u00e0 ph\u00e1t tri\u1ec3n ngu\u1ed3n gen lo\u00e0i c\u00e2y Xoay (Dialium cochinchinensis<\/em> Pierre), ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u nh\u1eb1m \u0111\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a m\u1ed9t s\u1ed1 qu\u1ea7n th\u1ec3 Xoay ph\u00e2n b\u1ed1 t\u1ea1i Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean. T\u1ed5ng c\u1ed9ng 75 m\u1eabu l\u00e1 thu\u1ed9c 5 qu\u1ea7n th\u1ec3 Xoay (Kbang, Kr\u00f4ng Pa, B\u00ecnh \u0110\u1ecbnh, Ninh Thu\u1eadn v\u00e0 Ph\u00fa Y\u00ean) \u0111\u00e3 \u0111\u01b0\u1ee3c thu th\u1eadp t\u00e1ch chi\u1ebft ADN v\u00e0 \u0111\u00e1nh gi\u00e1 \u0111a d\u1ea1ng di truy\u1ec1n b\u1eb1ng 10 ch\u1ec9 th\u1ecb ISSR. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch thu \u0111\u01b0\u1ee3c 86 ph\u00e2n \u0111o\u1ea1n ADN \u0111\u01b0\u1ee3c nh\u00e2n b\u1ea3n v\u1edbi k\u00edch th\u01b0\u1edbc t\u1eeb 110bp \u0111\u1ebfn 3.000bp, trong \u0111\u00f3 c\u00f3 56 ph\u00e2n \u0111o\u1ea1n \u0111a h\u00ecnh (65,83%) v\u00e0 30 ph\u00e2n \u0111o\u1ea1n \u0111\u1ed3ng h\u00ecnh (34,17%). Trong c\u00e1c qu\u1ea7n th\u1ec3 nghi\u00ean c\u1ee9u, qu\u1ea7n th\u1ec3 Kr\u00f4ng Pa c\u00f3 m\u1ee9c \u0111\u1ed9 \u0111a d\u1ea1ng di truy\u1ec1n cao nh\u1ea5t (h = 0,251), c\u00f2n qu\u1ea7n th\u1ec3 Ph\u00fa Y\u00ean c\u00f3 m\u1ee9c \u0111\u1ed9 \u0111a d\u1ea1ng di truy\u1ec1n th\u1ea5p nh\u1ea5t
\n(h = 0,189). Ph\u00e2n t\u00edch m\u1ed1i quan h\u1ec7 di truy\u1ec1n cho th\u1ea5y, 5 qu\u1ea7n th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh 2 nh\u00f3m l\u1edbn, t\u00e1ch bi\u1ec7t r\u00f5 r\u1ec7t nhau, trong \u0111\u00f3 to\u00e0n b\u1ed9 c\u00e1c m\u1eabu thu \u1edf qu\u1ea7n th\u1ec3 Kbang (T\u00e2y Nguy\u00ean) \u0111\u01b0\u1ee3c gh\u00e9p th\u00e0nh 1 nh\u00f3m ri\u00eang bi\u1ec7t v\u1edbi nh\u00f3m c\u00e1c m\u1eabu thu \u1edf c\u00e1c qu\u1ea7n th\u1ec3 c\u00f2n l\u1ea1i (Nam Trung B\u1ed9). \u0110\u00e1nh gi\u00e1 t\u00ednh \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a 5 xu\u1ea5t x\u1ee9 Xoay, k\u1ebft qu\u1ea3 cho th\u1ea5y Xoay l\u00e0 lo\u00e0i c\u00e2y c\u00f3 m\u1ee9c \u0111\u1ed9 \u0111a d\u1ea1ng di truy\u1ec1n t\u01b0\u01a1ng \u0111\u1ed1i cao (l\u00ean t\u1edbi 31%) nh\u01b0ng kho\u1ea3ng c\u00e1ch di truy\u1ec1n gi\u1eefa c\u00e1c qu\u1ea7n th\u1ec3 t\u1ef1 nhi\u00ean th\u1ea5p. T\u00ednh \u0111a d\u1ea1ng di truy\u1ec1n cao c\u00f9ng v\u1edbi s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 di truy\u1ec1n gi\u1eefa c\u00e1c qu\u1ea7n th\u1ec3 c\u00e1ch xa nhau v\u1ec1 \u0111\u1ecba l\u00fd cho th\u1ea5y c\u1ea7n ph\u1ea3i nghi\u00ean c\u1ee9u b\u1ea3o t\u1ed3n, khai th\u00e1c v\u00e0 ph\u00e1t tri\u1ec3n ngu\u1ed3n gen lo\u00e0i c\u00e2y n\u00e0y trong t\u01b0\u01a1ng lai.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea3o t\u1ed3n ngu\u1ed3n gen, c\u00e2y b\u1ea3n \u0111\u1ecba, Dialium cochinchinensis<\/em> Pierre, \u0111a d\u1ea1ng di truy\u1ec1n, ISSR<\/td>\n<\/tr>\n

<\/a>Evaluation of genetic diversity of some Dialium cochinchinesnis<\/em> natural populations in Vietnam<\/strong><\/p>\n

The main aim of this study is evaluating the genetic diversity of some Dialium cochinchinensis<\/em> Pierre populations are located in South Central and Highlands. A total of 75 individuals of D. cochinchinensis<\/em> were sampled from 5 different natural populations (Kbang, Kr\u00f4ng Pa, Binh Dinh, Ninh Thuan, and Phu Yen) for ADN extraction and genetic diversity examination by using 10 ISSR markers. Total of 86 ADN segments with size ranging from 110bp to 3,000bp, including 56 polymorphic segments (65.83%) and 20 monomorphic segments (34.17%). The ISSR data indicated moderate degree of genetic diversity for the species (h = 0.219). Five populations were classified into separated two groups, group one included all samples collected from Kbang population (in the Central Highland) and the other group containing the remaining populations (in South Central region). AMOVA result showed the high level of genetic different between populations (31%). Further investigations will be necessary to elucidate the required development and management strategies for this species.<\/p>\n

Keywords:<\/em><\/strong> Dialium cochinchinensis<\/em> Pierre, genetics conservation, genetic diversity, native species, ISSR<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NH\u00c2N GI\u1ed0NG in vitro<\/em> LO\u00c0I LAN NG\u1eccC TH\u1ea0CH HAI M\u00c0U (Dendrobium crystallinum<\/em> var. Alba) T\u1eea NU\u00d4I C\u1ea4Y \u0110\u1ed0T GI\u1ea2 H\u00c0NH<\/p>\n

<\/a>Tr\u1ea7n Th\u1ecb Ng\u1ecdc Lan, B\u00f9i V\u0103n Tr\u1ecdng<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc Nam Trung B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng in vitro<\/em> lan Ng\u1ecdc th\u1ea1ch hai m\u00e0u nh\u1eb1m b\u1ea3o t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n gi\u1ed1ng lan qu\u00fd n\u00e0y. K\u1ebft qu\u1ea3 cho th\u1ea5y protocorm-like body (PLB) h\u00ecnh th\u00e0nh t\u1eeb nu\u00f4i c\u1ea5y c\u00e1c \u0111\u1ed1t gi\u1ea3 h\u00e0nh tr\u00ean m\u00f4i tr\u01b0\u1eddng 3\/4 Murashige and Skoog (1962, 3\/4 MS) b\u1ed5 sung 1 mg\/l NAA sau 45 ng\u00e0y nu\u00f4i c\u1ea5y. C\u00e1c PLB th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh khi nu\u00f4i c\u1ea5y c\u00e1c l\u00e1t m\u1ecfng t\u1ebf b\u00e0o theo chi\u1ec1u d\u1ecdc (lTCL) c\u1ee7a PLB ban \u0111\u1ea7u tr\u00ean m\u00f4i tr\u01b0\u1eddng 3\/4 MS b\u1ed5 sung 1 mg\/l NAA v\u00e0 0,5 mg\/l BA. PLB th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c nh\u00e2n l\u00ean v\u1edbi 14,8 PLB\/PLB ban \u0111\u1ea7u khi ch\u00fang \u0111\u01b0\u1ee3c c\u1ea5y chuy\u1ec1n 45 ng\u00e0y m\u1ed9t l\u1ea7n tr\u00ean m\u00f4i tr\u01b0\u1eddng 3\/4 MS b\u1ed5 sung 30 g\/l sucrose, 0,5 mg\/l NAA, 1,5 mg\/l BA, 0,5 mg\/l than ho\u1ea1t t\u00ednh (AC), 10% n\u01b0\u1edbc d\u1eeba (v\/v) v\u00e0 8 g\/l agar. C\u00e1c PLB th\u1ee9 c\u1ea5p h\u00ecnh th\u00e0nh c\u00e2y v\u00e0 ph\u00e1t tri\u1ec3n t\u1ed1t tr\u00ean m\u00f4i tr\u01b0\u1eddng 3\/4 MS b\u1ed5 sung 0,5 mg\/l NAA,
\n0,5 mg\/l BA, 20 g\/l sucrose, 10% d\u1ecbch chi\u1ebft khoai t\u00e2y, 0,5 g\/l AC v\u00e0 8 g\/l agar sau 90 ng\u00e0y nu\u00f4i c\u1ea5y. Kh\u00f4ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i n\u00e0o v\u1ec1 h\u00ecnh th\u00e1i ghi nh\u1eadn \u0111\u01b0\u1ee3c \u1edf c\u00e1c c\u00e2y n\u00e0y qua ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng hi\u1ec7u qu\u1ea3 t\u1eeb nu\u00f4i c\u1ea5y \u0111\u1ed1t gi\u1ea3 h\u00e0nh.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> \u03b1-naphtaleneacetic acid (NAA), 6 – Benzylaminopurine (BA), Dendrobium crystallinum var. Alba<\/em>, \u0111\u1ed1t gi\u1ea3 h\u00e0nh, l\u1edbp m\u1ecfng t\u1ebf b\u00e0o<\/td>\n<\/tr>\n

<\/a>In vitro<\/em> micropropagation of Dendrobium crystallinum <\/em>var. Alba, originated from nodes of pseudobulb culture<\/strong><\/p>\n

Studies on micropropagation of Dendrobium crystallinum <\/em>var.Alba were conducted in order to conserve and develop this precious orchid species. The results showed that PLBs were formed from nodes of pseudobulb culture on the 3\/4 MS medium supplemented with 1 mg\/l NAA within 45 days. PLB longitudinal thin cell layer culture was used as a technique for PLBs micropropagation. The 3\/4 MS medium containing 1 mg\/l NAA and 0.5 mg\/l BA was optimal for secondary PLB formation. After 45 days of culture, secondary PLBs multiplied with 14,8 PLBs\/initial PLB when they were subcultured on the 3\/4 MS medium supplemented with 10% coconut water,
\n30 g\/l sucrose, 0.5 mg\/l NAA, 1.5 mg\/l BA, 0.5 g\/l activated charcoal (AC) and 8 g\/l agar. Secondary PLBs developed into plantlets with well-developed shoots and roots on the 3\/4 MS medium supplemented with 0.5 mg\/l NAA, 0.5 mg\/l BA, 20 g\/l sucrose, 10% potato extract, 0.5 g\/l AC, and 8 g\/l agar after 90 days. No abnormal morphological changes were found in Dendrobium <\/em>seedlings with the use of this effective propagation method.<\/p>\n

Keywords:<\/em><\/strong> \u03b1-naphtaleneacetic acid (NAA), 6 – Benzylaminopurine (BA), Dendrobium <\/em>crystallinum <\/em>var. Alba,<\/em> longitudinal thin cell layer, node of pseudobulb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 K\u1ebeT QU\u1ea2 KH\u1ea2O NGHI\u1ec6M M\u1ede R\u1ed8NG C\u00c1C GI\u1ed0NG KEO LAI, KEO L\u00c1 TR\u00c0M T\u1ea0I QU\u1ea2NG TR\u1eca<\/p>\n

<\/a>Nguy\u1ec5n H\u1ea3i Th\u00e0nh, L\u00ea C\u00f4ng \u0110\u1ecbnh, V\u0169 \u0110\u1ee9c B\u00ecnh, H\u00e0 V\u0103n Thi\u1ec7n<\/p>\n

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

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

Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n \u0111\u00e3 c\u00f4ng nh\u1eadn nhi\u1ec1u gi\u1ed1ng keo lai v\u00e0 Keo l\u00e1 tr\u00e0m c\u00f3 n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cao. \u0110\u1ec3 c\u00f3 c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c \u0111\u01b0a c\u00e1c gi\u1ed1ng m\u1edbi v\u00e0o s\u1ea3n xu\u1ea5t \u0111\u1ea1i tr\u00e0 c\u00f3 hi\u1ec7u qu\u1ea3 cao c\u1ea7n ti\u1ebfn h\u00e0nh kh\u1ea3o nghi\u1ec7m m\u1edf r\u1ed9ng. B\u00e0i b\u00e1o n\u00e0y gi\u1edbi thi\u1ec7u k\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m m\u1edf r\u1ed9ng m\u1ed9t s\u1ed1 gi\u1ed1ng keo lai v\u00e0 Keo l\u00e1 tr\u00e0m \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn t\u1ea1i t\u1ec9nh Qu\u1ea3ng Tr\u1ecb. Kh\u1ea3o nghi\u1ec7m \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng th\u00e1ng 12 n\u0103m 2015 t\u1ea1i huy\u1ec7n Cam L\u1ed9, t\u1ec9nh Qu\u1ea3ng Tr\u1ecb. Sau 42 th\u00e1ng tu\u1ed5i, c\u00e1c kh\u1ea3o nghi\u1ec7m c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh \u0111\u1ea1t r\u1ea5t cao t\u1eeb 85,7 \u0111\u1ebfn 86,7%. K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 kh\u1ea3o nghi\u1ec7m m\u1edf r\u1ed9ng c\u00e1c d\u00f2ng keo lai cho th\u1ea5y c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t v\u1ec1 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao; v\u1ec1 \u0111\u1ed9 th\u1eb3ng th\u00e2n ch\u01b0a c\u00f3 s\u1ef1 sai kh\u00e1c. N\u0103ng su\u1ea5t b\u00ecnh qu\u00e2n \u0111\u1ea1t 20,2 m3<\/sup>\/ha\/n\u0103m. N\u0103ng su\u1ea5t c\u1ee7a 4 d\u00f2ng keo lai (BV33, BV73, BV16, AH7) \u0111\u1ec1u \u0111\u1ea1t tr\u00ean 20 m3<\/sup>\/ha\/n\u0103m, 3 d\u00f2ng (BV16, BV73, AH7) c\u00f3 n\u0103ng su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi trung b\u00ecnh to\u00e0n kh\u1ea3o nghi\u1ec7m t\u1eeb 6 – 15%. \u0110\u1ed1i v\u1edbi kh\u1ea3o nghi\u1ec7m m\u1edf r\u1ed9ng Keo l\u00e1 tr\u00e0m sau 42 th\u00e1ng tu\u1ed5i \u0111\u00e3 c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh, th\u1ec3 t\u00edch th\u00e2n c\u00e2y v\u00e0 \u0111\u1ed9 th\u1eb3ng th\u00e2n. N\u0103ng su\u1ea5t c\u1ee7a c\u00e1c d\u00f2ng Keo l\u00e1 tr\u00e0m giai \u0111o\u1ea1n 42 th\u00e1ng tu\u1ed5i \u0111\u1ea1t 11,3 m3<\/sup>\/ha\/n\u0103m. Trong \u0111\u00f3, c\u00f3 3 d\u00f2ng Keo l\u00e1 tr\u00e0m (AA9, BVlt83, Clt98) c\u00f3 n\u0103ng su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i tr\u00ean 20% so v\u1edbi Keo l\u00e1 tr\u00e0m h\u1ea1t \u0111\u1ea1i tr\u00e0 l\u00e0m \u0111\u1ed1i ch\u1ee9ng. C\u00e1c d\u00f2ng keo lai (BV73, BV16, AH7) v\u00e0 Keo l\u00e1 tr\u00e0m (AA9, BVlt83, Clt98) \u0111\u00e3 ch\u1ee9ng t\u1ecf r\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ed1i v\u1edbi v\u00f9ng \u0111\u1ea5t \u0111\u1ed3i n\u00fai t\u1ec9nh Qu\u1ea3ng Tr\u1ecb.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo lai, Keo l\u00e1 tr\u00e0m, kh\u1ea3o nghi\u1ec7m, sinh tr\u01b0\u1edfng, Qu\u1ea3ng Tr\u1ecb<\/td>\n<\/tr>\n

<\/a>Evaluation of intensive test results of acacia hybrid and Acacia auriculiformis<\/em> varieties in Quang Tri<\/strong><\/p>\n

In recent years, the Ministry of Agriculture and Rural Development has recognized many varieties of Acacia hybrid and Acacia auriculiformis<\/em> that have high yield and quality. In order to have a scientific basis for bringing new varieties into mass production with high efficiency, it is necessary to conduct extensive tests. This article introduces intensive test results of some varieties of Acacia hybrid and Acacia auriculiformis<\/em> which have been recognized in Quang Tri province. The tests were developed in 12th December 2015 in Cam Lo, Quang Tri. After 42 months of age, the tests had very high average survival rate of from 85.7 to 86.7%. The evaluation results of intensive tests on Acacia hybrid clones showed significant differences in diameter growth, height growth; stem straigthness did not have a distinct difference. The average yield reached 20.2 m3<\/sup>\/ha\/year. The yield of 4 Acacia hybrid clones (BV33, BV73, BV16, AH7) reached over 20 m3<\/sup>\/ha\/year, 3 clones (BV16, BV73, AH7) had better yield than the average testing from 6 to 15%. As for intensive test of Acacia auriculiformis after 42 months of age, there were significant differences in diameter at breast height, tree-standing volume and stem straightness. The yield of Acacia auriculiformis<\/em> clones in 42 – month-period reached 11.3 m3<\/sup>\/ha\/year. In particular, there are 3 clones of Acacia auriculiformis (AA9, BVlt83, Clt98) with a remarkable yield of over 20% compared to that of Acacia auriculiformis<\/em> from seed in mass production as a control. Acacia hybrid clones (BV73, BV16, AH7) and Acacia auriculiformis<\/em> clones (AA9, BVlt83, Clt98) proved to have good prospect in term of growth and quality for mountainous areas in Quang Tri province.<\/p>\n

Keywords: <\/em>Acacia hybrid, Acacia auriculifomis<\/em>, trial, grown, Quang Tri province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG C\u1ee6A M\u1ed8T S\u1ed0 GI\u1ed0NG KEO \u0110ANG \u0110\u01af\u1ee2C TR\u1ed2NG PH\u1ed4 BI\u1ebeN \u1ede V\u00d9NG \u0110\u00d4NG NAM B\u1ed8<\/p>\n

<\/a>Nguy\u1ec5n V\u0103n \u0110\u0103ng1<\/sup>, V\u0169 \u0110\u00ecnh H\u01b0\u1edfng1<\/sup>, Nguy\u1ec5n Xu\u00e2n H\u1ea3i1
\n<\/sup>Ki\u1ec1u M\u1ea1nh H\u00e01<\/sup>, H\u1ed3 T\u1ed1 Vi\u1ec7t1<\/sup>, Tr\u1ea7n Thanh Tr\u0103ng2<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m \u1ee8ng d\u1ee5ng Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Nam B\u1ed9
\n2<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m \u0111\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng c\u1ee7a 12 gi\u1ed1ng keo \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn t\u1ea1i \u0110\u00f4ng Nam B\u1ed9 bao g\u1ed3m 2 d\u00f2ng Keo l\u00e1 tr\u00e0m, 10 d\u00f2ng keo lai v\u00e0 2 gi\u1ed1ng Keo tai t\u01b0\u1ee3ng. Ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng r\u1eebng l\u00e0 h\u1ed7n giao c\u00e1c gi\u1ed1ng v\u00e0 d\u00f2ng. M\u1eadt \u0111\u1ed9 tr\u1ed3ng 3.333 c\u00e2y\/ha. K\u1ebft qu\u1ea3 \u0111\u1ebfn giai \u0111o\u1ea1n 5 tu\u1ed5i th\u00ec t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c d\u00f2ng keo lai suy gi\u1ea3m m\u1ea1nh so v\u1edbi c\u00e1c d\u00f2ng Keo l\u00e1 tr\u00e0m v\u00e0 gi\u1ed1ng Keo tai t\u01b0\u1ee3ng. C\u00e1c ch\u1ec9 ti\u00eau v\u1ec1 sinh tr\u01b0\u1edfng keo lai v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi Keo l\u00e1 tr\u00e0m v\u00e0 Keo tai t\u01b0\u1ee3ng. Trong c\u00e1c d\u00f2ng keo lai th\u00ec d\u00f2ng AH1 l\u00e0 d\u00f2ng sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t. T\u1ea1i v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn lo\u00e0i keo lai d\u00f2ng AH1 \u0111\u1ec3 tr\u1ed3ng r\u1eebng, \u0111\u00e2y l\u00e0 d\u00f2ng c\u00f3 sinh tr\u01b0\u1edfng nhanh v\u00e0 c\u00f3 n\u0103ng su\u00e2\u0301t cao.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Sinh tr\u01b0\u01a1\u0309ng ca\u0301c do\u0300ng\/gi\u00f4\u0301ng Keo la\u0301 tra\u0300m, Keo tai t\u01b0\u01a1\u0323ng, keo lai<\/td>\n<\/tr>\n

<\/a>Evaluation for the growth of some acacia varieties common planted in the South Eastern Region<\/strong><\/p>\n

The research was conducted to evaluate the growth of 12 acacia varieties planting in the South Eastern Region including: two clones A. auriculiformis<\/em>, 10 clones Acacia hybrid and two varieties of Acacia mangium<\/em>. Planting method was applied for mixing varieties and clones. The planting density was 3,333 trees\/ha. The results showed that five years after planting the survival rate of Acacia hybrid clones decreased sharply compared to that of A. auriculiformis<\/em> and A.<\/em> mangium<\/em>. The growth of Acacia hybrid clones was greater than that of Acacia auriculiformis<\/em> and Acacia mangium<\/em>. In the Acacia hybrid, the clone AH1 is the fastest growth. In the Southern Region, clone AH1 is more suitable for afforestation because of fast growing and high productivity.<\/p>\n

Keywords: <\/em><\/strong>Growth of varieties Acacia<\/em> auriculiformis, A. mangium, A. hybrid<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U K\u1ef8 THU\u1eacT GI\u00c2M HOM B\u1edcI L\u1edcI V\u00c0NG (Litsea pierrei<\/em> Lecomte)<\/p>\n

<\/a>Nguy\u1ec5n Anh Tu\u1ea5n1<\/sup>, Ph\u00f9ng V\u0103n T\u1ec9nh1<\/sup>, Tr\u1ea7n V\u0103n S\u00e2m1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9
\n2<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c gi\u00e1 th\u1ec3, lo\u1ea1i ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng v\u00e0 n\u1ed3ng \u0111\u1ed9 ph\u00f9 h\u1ee3p, th\u1eddi gian x\u1eed l\u00fd thu\u1ed1c, tu\u1ed5i c\u00e2y m\u1eb9 l\u1ea5y hom, m\u00f9a v\u1ee5 gi\u00e2m hom t\u1ed1t nh\u1ea5t cho kh\u1ea3 n\u0103ng ra r\u1ec5 c\u1ee7a hom gi\u00e2m. \u1ea2nh h\u01b0\u1edfng c\u1ee7a gi\u00e1 th\u1ec3: CT1 C\u00e1t s\u1ea1ch; CT2 70% \u0111\u1ea5t t\u1ea7ng m\u1eb7t + 30% c\u00e1t s\u1ea1ch; CT3 70% \u0111\u1ea5t t\u1ea7ng m\u1eb7t + 30% x\u01a1 d\u1eeba cho th\u1ea5y gi\u00e1 th\u1ec3 c\u00e1t s\u1ea1ch cho t\u1ef7 l\u1ec7 ra r\u1ec5 32,5% v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 30,3 l\u00e0 t\u1ed1t nh\u1ea5t. \u1ea2nh h\u01b0\u1edfng c\u1ee7a ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng NAA, v\u00e0 IBA v\u1edbi n\u1ed3ng \u0111\u1ed9 t\u1eeb 1.000 ppm; 2.000 ppm; 3.000 ppm; 4.000 ppm \u1edf d\u1ea1ng n\u01b0\u1edbc cho th\u1ea5y IBA 2.000 ppm cho t\u1ef7 l\u1ec7 ra r\u1ec5 v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 cao nh\u1ea5t (t\u01b0\u01a1ng \u1ee9ng l\u00e0 30,0% v\u00e0 35,2). \u1ea2nh h\u01b0\u1edfng v\u1ec1 th\u1eddi gian x\u1eed l\u00fd thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t \u1edf nghi\u1ec7m th\u1ee9c c\u00f3 th\u1eddi gian x\u1eed l\u00fd 120 gi\u00e2y v\u1edbi t\u1ef7 l\u1ec7 ra r\u1ec5 39,2% v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 48,8. Tu\u1ed5i c\u00e2y m\u1eb9 l\u1ea5y hom c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ra r\u1ec5 c\u1ee7a hom gi\u00e2m, hom gi\u00e2m t\u1eeb c\u00e2y m\u1eb9 6 th\u00e1ng tu\u1ed5i cho t\u1ef7 l\u1ec7 ra r\u1ec5 t\u1ed1t nh\u1ea5t 38,3%, ch\u1ec9 s\u1ed1 ra r\u1ec5 50,3. V\u1ec1 m\u00f9a v\u1ee5 gi\u00e2m hom th\u00ec t\u1ef7 l\u1ec7 ra r\u1ec5 c\u1ee7a hom gi\u00e2m v\u00e0o m\u00f9a kh\u00f4 l\u00e0 35,8%, ch\u1ec9 s\u1ed1 ra r\u1ec5 l\u00e0 41,5 t\u1ed1t h\u01a1n so v\u1edbi gi\u00e2m hom v\u00e0o m\u00f9a m\u01b0a \u1edf khu v\u1ef1c \u0110\u00f4ng Nam B\u1ed9.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1eddi l\u1eddi v\u00e0ng, gi\u00e2m hom, t\u1ef7 l\u1ec7 ra r\u1ec5<\/td>\n<\/tr>\n

<\/a>Propagation results of Litsea pierrei <\/em>\u00a0Lecomte by cutting<\/strong><\/p>\n

The objective of the study was to determine the potting mixes, type and concentration of hormone, time of hormone treatment, mother age to get cuttings, suitable cuttings season in Litsea pierrei <\/em>Lecomte cutting. For potted mixing, three different treatments were used as follows: CT1: 100% clean sand, CT2: 70% topsoil + 30% clean sand; CT3: 70% topsoil + 30% coir. The results showed that treatment 100% clean sand has a rooting rate of 32.5% and a rooting index of 30.3 is the best. The effect of hormone NAA, and IBA with the concentration of 1,000 ppm; 2,000 ppm; 3,000 ppm; 4,000 ppm in solution on rooting percentage of cuttings was implemented. The results showed that 2,000 ppm IBA gave highest rooting percentage and rooting index, respectively 30.0% and 35.2. The best time for hormone treatment is 120 seconds, with 39.2% rooting percentage and 48.8 rooting index. Mother age to get cuttings affects the rooting ability of cuttings, cuttings from 6 – month-old mother trees give the best rooting rate 38,3%, the rooting index 50.3. For cuttings season, the rooting rate of cuttings in the dry season is 35.8%, the rooting index is 41.5, better than cuttings in the rainy season in the Southeast region.<\/p>\n

Keywords:<\/em><\/strong> Litsea pierrei<\/em> Lecomte, cutting propagation, rooting percentage<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M H\u1ea0T GI\u1ed0NG, PH\u01af\u01a0NG PH\u00c1P X\u1eec L\u00dd V\u00c0 B\u1ea2O QU\u1ea2N H\u1ea0T CHI\u00caU LI\u00caU N\u01af\u1edaC (Terminalia calamansanai<\/em> Rolfe)<\/p>\n

<\/a>Nguy\u1ec5n Thanh Minh, \u0110\u1ed7 Th\u1ecb Ng\u1ecdc H\u00e0, Ph\u00f9ng V\u0103n T\u1ec9nh<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

M\u1ee5c \u0111\u00edch c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m h\u1ea1t gi\u1ed1ng, ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd v\u00e0 b\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng Chi\u00eau li\u00eau n\u01b0\u1edbc. H\u1ea1t Chi\u00eau li\u00eau n\u01b0\u1edbc d\u00f9ng l\u00e0m th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c thu h\u00e1i tr\u00ean 10 c\u00e2y m\u1eb9 trong r\u1eebng t\u1ef1 nhi\u00ean thu\u1ed9c Khu BTTN V\u0103n h\u00f3a \u0110\u1ed3ng Nai. Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u x\u1eed l\u00fd h\u1ea1t c\u00f3 3 ph\u01b0\u01a1ng th\u1ee9c: XL1: Ng\u00e2m n\u01b0\u1edbc nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng (17 – 20o<\/sup>C); XL2: Ng\u00e2m n\u01b0\u1edbc 2 s\u00f4i 3 l\u1ea1nh (40 – 45o<\/sup>C) v\u00e0 XL3: Ng\u00e2m n\u01b0\u1edbc 3 s\u00f4i 2 l\u1ea1nh (55 – 60o<\/sup>C). Ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n h\u1ea1t gi\u1ed1ng c\u00f3 3 ph\u01b0\u01a1ng th\u1ee9c. BQ1: B\u1ea3o qu\u1ea3n l\u1ea1nh -10o<\/sup>C \u0111\u1ebfn -5o<\/sup>C; BQ2: B\u1ea3o qu\u1ea3n l\u1ea1nh 3o<\/sup>C \u0111\u1ebfn 5o<\/sup>C v\u00e0 BQ3: B\u1ea3o qu\u1ea3n kh\u00f4 th\u00f4ng th\u01b0\u1eddng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m h\u1ea1t gi\u1ed1ng cho th\u1ea5y h\u1ea1t nguy\u00ean c\u00e1nh d\u00e0i v\u00e0 r\u1ed9ng kho\u1ea3ng 5,9 cm v\u00e0 2,5 cm; h\u1ea1t \u0111\u00e3 lo\u1ea1i b\u1ecf c\u00e1nh (h\u1ea1t kh\u00f4ng c\u00e1nh): 1,3 cm v\u00e0 0,7 cm. Tr\u1ecdng l\u01b0\u1ee3ng 1.000 h\u1ea1t nguy\u00ean c\u00e1nh: 110,6 g, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 1 kg h\u1ea1t nguy\u00ean c\u00e1nh: c\u00f3 9.043 \u00b1 20 h\u1ea1t. Tr\u1ecdng l\u01b0\u1ee3ng 1.000 h\u1ea1t kh\u00f4ng c\u00e1nh: 84,3 g t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 1 kg h\u1ea1t kh\u00f4ng c\u00e1nh: c\u00f3 11.858 \u00b1 22 h\u1ea1t. T\u1ef7 l\u1ec7 n\u01b0\u1edbc trong h\u1ea1t Chi\u00eau li\u00eau kh\u00f4ng c\u00f3 c\u00e1nh m\u1edbi thu h\u00e1i l\u00e0 19,8% v\u00e0 tr\u01b0\u1edbc khi b\u1ea3o qu\u1ea3n l\u00e0 11,3%. V\u1ec1 ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd h\u1ea1t Chi\u00eau li\u00eau n\u01b0\u1edbc: Ng\u00e2m n\u01b0\u1edbc \u1edf nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng (17 – 20o<\/sup>C) cho t\u1ef7 l\u1ec7 n\u1ea3y n\u1ea7m: 83,0%, th\u1ebf n\u1ea3y m\u1ea7m: 43,3%. Ng\u00e2m n\u01b0\u1edbc \u1edf nhi\u1ec7t \u0111\u1ed9 (55 – 60o<\/sup>C) t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m ch\u1ec9 c\u00f2n 40,5%, th\u1ebf n\u1ea3y m\u1ea7m: 21,3%. H\u1ea1t Chi\u00eau li\u00eau n\u01b0\u1edbc b\u1ea3o qu\u1ea3n trong ng\u0103n m\u00e1t, ng\u0103n \u0111\u00e1 t\u1ee7 l\u1ea1nh \u0111\u1ebfn 24 th\u00e1ng t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m v\u1eabn \u0111\u1ea1t tr\u00ean 49%. B\u1ea3o qu\u1ea3n theo ph\u01b0\u01a1ng ph\u00e1p th\u00f4ng th\u01b0\u1eddng trong 6 th\u00e1ng t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u00f2n 11,5%, sau 8 th\u00e1ng h\u1ea1t m\u1ea5t s\u1ee9c n\u1ea3y m\u1ea7m ho\u00e0n to\u00e0n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Chi\u00eau li\u00eau n\u01b0\u1edbc, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m, ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n<\/td>\n<\/tr>\n

<\/a>Study on seed characteristics, treatment methods and storage methods of Terminalia calamansanai<\/em> Rolfe<\/strong><\/p>\n

Objective of the study was to determine seed characteristics, seed germination treatment and storage methods of Terminalia calamansanai<\/em> Rolfe. The seeds used for experiments were collected on 10 mother trees from natural forest of Dong Nai Nature and Culture Reserve. There are three methods of germination treatment the seed: XL1: Soak in normal temperature water: 17 – 20\u00b0C; XL2: Soak in water at a temperature of (40 – 45o<\/sup>C): (mixture of boiling water and normal temperature water with proportion of 2 to 3) and XL3: Soak in water at temperature water 55 – 60o<\/sup>C: (mixture of boiling water and normal temperature water with proportion of 3 to 2). The methods of seed storage were: BQ1: cold storage -10o<\/sup>C to -5o<\/sup>C; BQ2: cold storage 3o<\/sup>C to 5o<\/sup>C and BQ3: normal dry storage. Research results on seed characteristics show: winged seed has the length and width of 5.9 cm and 2.5 cm; Seed removed wing (wingless seed): 1.3 cm and 0.7 cm. Weight of 1,000 winged seeds: 110.6 g, equivalent to 1 kg of seeds: 9,043 \u00b1 20 seeds. Weight of 1,000 wingless seeds: 84.3 g, equivalent to 1 kg seeds without wings: 11,858 \u00b1 22 seeds. The ratio of water in wingless seeds was 11.3%. Seed germination treatment method: Soaked seeds in water at normal temperatures (17 – 20o<\/sup>C) had a germination percentage: 83.0%, germination energy: 43.3%; Soaked seeds in water at (55 – 60o<\/sup>C) reduced germination to 40,5%, with germination energy of 21.3%;. Seeds that were kept in -10 to 5o<\/sup>C maintained theirr germination percentage above 49% after 24 months of storage. In constrast, the seeds that were stored at room temperature reduced to 11,5% after 6 months and completely lost their germination after 8 months.<\/p>\n

Keywords: <\/em><\/strong>Terminalia calamansanai<\/em> Rolfe, germination percentage, storage method<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC C\u1ee6A C\u00c2Y XOAN \u0110\u00c0O (Prunus arborea<\/em> Endle.) \u1ede C\u00c1C T\u1ec8NH PH\u00cdA B\u1eaeC<\/p>\n

<\/a>Nguy\u1ec5n Tr\u1ecdng \u0110i\u1ec3n1<\/sup>, Ho\u00e0ng V\u0103n Th\u1eafng2<\/sup>, Cao V\u0103n L\u1ea1ng2<\/sup><\/p>\n

1<\/sup> Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u00f4ng B\u1eafc B\u1ed9
\n2 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e2y Xoan \u0111\u00e0o \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh ph\u00eda B\u1eafc cho th\u1ea5y, Xoan \u0111\u00e0o c\u00f3 ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean trong nhi\u1ec1u tr\u1ea1ng th\u00e1i r\u1eebng IIA, IIB \u0111\u1ebfn IIIA1, IIIA2 v\u00e0 IIIA3, tr\u00ean c\u1ea3 \u0111\u1ecba h\u00ecnh \u0111\u1ed3i n\u00fai th\u1ea5p \u0111\u1ebfn trung b\u00ecnh v\u00e0 cao, n\u01a1i c\u00f3 \u0111\u1ed9 cao so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n t\u1eeb 65 – 1.415 m. M\u1eadt \u0111\u1ed9 trung b\u00ecnh c\u1ee7a c\u00e2y tr\u01b0\u1edfng th\u00e0nh lo\u00e0i Xoan \u0111\u00e0o trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean dao \u0111\u1ed9ng t\u1eeb 5 \u0111\u1ebfn 56 c\u00e2y tr\u00ean 1 ha (trung b\u00ecnh l\u00e0 26 c\u00e2y\/ha). S\u1ed1 c\u00e2y Xoan \u0111\u00e0o chi\u1ebfm t\u1ef7 l\u1ec7 trung b\u00ecnh l\u00e0 3,6% trong c\u00e1c l\u00e2m ph\u1ea7n. Xoan \u0111\u00e0o th\u01b0\u1eddng ph\u00e2n b\u1ed1 tr\u00ean \u0111\u1ea5t c\u00f3 \u0111\u1ed9 pH < 4, tr\u00ean \u0111\u1ea5t c\u00f3 th\u00e0nh ph\u1ea7n c\u01a1 gi\u1edbi g\u1ed3m \u0111\u1ea5t pha c\u00e1t, \u0111\u1ea5t th\u1ecbt nh\u1eb9, \u0111\u1ea5t th\u1ecbt n\u1eb7ng v\u00e0 \u0111\u1ea5t s\u00e9t trung b\u00ecnh, n\u01a1i \u0111\u1ea5t ngh\u00e8o dinh d\u01b0\u1ee1ng, c\u00f3 h\u00e0m l\u01b0\u1ee3ng m\u00f9n \u1edf m\u1ee9c ngh\u00e8o ho\u1eb7c trung b\u00ecnh, h\u00e0m l\u01b0\u1ee3ng l\u00e2n, kali d\u1ec5 ti\u00eau \u0111\u1ea1t m\u1ee9c r\u1ea5t ngh\u00e8o ho\u1eb7c ngh\u00e8o, h\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m t\u1ed5ng s\u1ed1 \u0111\u1ea1t m\u1ee9c trung b\u00ecnh \u0111\u1ebfn gi\u00e0u. Trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean c\u00f3 Xoan \u0111\u00e0o ph\u00e2n b\u1ed1 \u1edf 4 t\u1ec9nh \u0111i\u1ec1u tra th\u00ec Xoan \u0111\u00e0o c\u00f3 \u00fd ngh\u0129a v\u1ec1 m\u1eb7t sinh th\u00e1i trong c\u00e1c tr\u1ea1ng th\u00e1i IIB, IIIA2 v\u00e0 IIIA3 v\u1edbi ch\u1ec9 s\u1ed1 IVI = 6,1 – 7,8%. Ch\u1ec9 duy nh\u1ea5t trong tr\u1ea1ng th\u00e1i IIA Xoan \u0111\u00e0o ch\u01b0a th\u1ec3 hi\u1ec7n r\u00f5 vai tr\u00f2 sinh th\u00e1i trong l\u00e2m ph\u1ea7n (ch\u1ec9 s\u1ed1 IVI<5%). Trong 4 \u01b0u h\u1ee3p th\u1ef1c v\u1eadt trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng th\u00ec c\u00f3 03 \u01b0u h\u1ee3p c\u00f3 m\u1eb7t c\u1ee7a lo\u00e0i Xoan \u0111\u00e0o. Xoan \u0111\u00e0o t\u00e1i sinh tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh c\u00e2y t\u00e1i sinh v\u1edbi h\u1ec7 s\u1ed1 t\u1ed5 th\u00e0nh t\u1eeb 5,56 – 6,12%.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> L\u00e2m h\u1ecdc, ph\u00eda B\u1eafc, Xoan \u0111\u00e0o<\/td>\n<\/tr>\n

<\/a>Research result of some silvicultural charecteristics of Prunus arborea<\/em> Endle. Species in Northern provinces<\/strong><\/p>\n

Research on silvicultual characteristics of Prunus arborea<\/em> was conducted in some Northern provinces, Vietnam showed that, P. arborea<\/em> has natural distributions in the forest status of IIA, IIB, IIIA1, IIIA2, and IIIA3. It can be found in large range of elevation zones from 65 m to 1,415 m above sea level. The tree (stems with diameter at breast height > 6 cm) density of P. arborea<\/em> ranged from 5 to 56 stems ha-1<\/sup> (mean of 26 stems ha-1<\/sup>).
\nP. arborea<\/em> trees accounted for an average of 3.6% in the stands. The species prefers growing in poor acidic soil with pH <4 and soil texture of loam to silt, where the soil is poor in nutrients and has a humus content poor or average, phosphorus and potassium content are very poor or poor, and total protein content is moderate to rich. In four surveyed provinces, P. arborea<\/em> has Importance Value Index (IVI) of 6.1 – 7.8%. Only in the forest status IIA P. arborea<\/em> does not clearly show the ecological role in the forest stand (IVI index < 5%), there are 03 dominant species present in
\nP. arborea<\/em> species of four dominant. P. arborea<\/em> regenerates to participate in the formula of regeneration tree with a nest coefficient of 5.56 – 6.12%.<\/p>\n

Keywords: <\/em><\/strong>Silvicultural characteristics, Northern provinces, Prunus arborea <\/em>Endle.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>TH\u1ef0C TR\u1ea0NG G\u00c2Y TR\u1ed2NG B\u1ea6N KH\u00d4NG C\u00c1NH (Sonneratia apetala <\/em>Buch-Ham)<\/em> \u1ede V\u00d9NG VEN BI\u1ec2N B\u1eaeC B\u1ed8 V\u00c0 B\u1eaeC TRUNG B\u1ed8, VI\u1ec6T NAM<\/p>\n

<\/a>L\u00ea V\u0103n Th\u00e0nh, \u0110\u1ed7 Th\u1ecb Kim Nhung, Ph\u1ea1m Ng\u1ecdc Th\u00e0nh,
\nTr\u1ea7n V\u0103n Cao, T\u1ea1 V\u0103n H\u00e2n, Nguy\u1ec5n Kh\u1eafc Hi\u1ebfu, Nguy\u1ec5n Xu\u00e2n \u0110\u00e0i<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

B\u1ea7n kh\u00f4ng c\u00e1nh l\u00e0 lo\u00e0i c\u00e2y ng\u1eadp m\u1eb7n sinh tr\u01b0\u1edfng nhanh, ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean \u1edf Bangladesh, \u1ea4n \u0110\u1ed9 v\u00e0 Myanma, \u0111\u00e3 d\u1eabn gi\u1ed1ng tr\u1ed3ng r\u1eebng ng\u1eadp m\u1eb7n th\u00e0nh c\u00f4ng \u1edf Trung Qu\u1ed1c. Hi\u1ec7n nay \u1edf Vi\u1ec7t Nam, B\u1ea7n kh\u00f4ng c\u00e1nh \u0111\u00e3 \u0111\u01b0\u1ee3c d\u1eabn gi\u1ed1ng v\u1ec1 g\u00e2y tr\u1ed3ng \u1edf v\u00f9ng ven bi\u1ec3n B\u1eafc B\u1ed9 v\u00e0 B\u1eafc Trung B\u1ed9, \u0111i\u1ec1u ki\u1ec7n g\u00e2y tr\u1ed3ng t\u1eeb thu\u1eadn l\u1ee3i \u0111\u1ebfn kh\u00f3 kh\u0103n, th\u1ec3 n\u1ec1n t\u1eeb b\u00f9n m\u1ec1m \u0111\u1ebfn c\u00e1t pha, \u0111\u1ed9 m\u1eb7n n\u01b0\u1edbc bi\u1ec3n t\u1eeb th\u1ea5p \u0111\u1ebfn t\u01b0\u01a1ng \u0111\u1ed1i cao (6,5 -19\u2030). M\u1ee9c \u0111\u1ed9 ng\u1eadp tri\u1ec1u t\u1eeb n\u00f4ng \u0111\u1ebfn s\u00e2u. Sau 7 – 8 n\u0103m tr\u1ed3ng h\u1ed7n giao gi\u1eefa B\u1ea7n kh\u00f4ng c\u00e1nh v\u00e0 B\u1ea7n chua \u1edf Th\u00e1i B\u00ecnh cho k\u1ebft qu\u1ea3 h\u1ea7u h\u1ebft c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng c\u1ee7a B\u1ea7n kh\u00f4ng c\u00e1nh \u0111\u1ec1u cao h\u01a1n B\u1ea7n chua. B\u1ea7n kh\u00f4ng c\u00e1nh c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ea1nh r\u1ea5t t\u1ed1t, t\u1ea1i Thanh H\u00f3a sau tr\u1ed3ng g\u1eb7p \u0111\u1ee3t r\u00e9t h\u1ea1i k\u1ef7 l\u1ee5c v\u00e0o \u0111\u1ea7u n\u0103m 2016 B\u1ea7n kh\u00f4ng c\u00e1nh kh\u00f4ng b\u1ecb ch\u1ebft nh\u01b0 B\u1ea7n chua. T\u1ea1i Th\u1eeba Thi\u00ean Hu\u1ebf sau 2,5 n\u0103m tr\u1ed3ng h\u1ed7n giao gi\u1eefa B\u1ea7n kh\u00f4ng c\u00e1nh, B\u1ea7n chua v\u00e0 \u0110\u01b0\u1edbc \u0111\u00f4i c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng cao (> 90%), B\u1ea7n kh\u00f4ng c\u00e1nh cho sinh tr\u01b0\u1edfng D00<\/sub>, Hvn<\/sub>,
\nDt \u00a0<\/sub>cao nh\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u1ea7n kh\u00f4ng c\u00e1nh (Sonneratia apetala<\/em> Buch-Ham), c\u00e2y ng\u1eadp m\u1eb7n, \u0111i\u1ec1u ki\u1ec7n g\u00e2y tr\u1ed3ng, sinh tr\u01b0\u1edfng<\/td>\n<\/tr>\n

<\/a>Current situation of growing Sonneratia apetala<\/em> Buch-Ham in Northern and North Central Coastal Regions in Vietnam<\/strong><\/p>\n

Sonneratia apetala<\/em> is a fast – growing mangrove tree species, naturally distributed in Bangladesh, India and Myanmar, and used for successful mangrove afforestation in China. In Vietnam, Sonneratia apetala<\/em> is currently being cultivated in the Northern and North Central Coastal regions with growing conditions ranging from favorable to unfavorable: substrate from soft mud to arenaceous; salinity of seawater from low to relatively high (6.5 -19\u2030); and the extent of tidal inundation from shallow to deep. After 7 – 8 years of mixed planting of Sonneratia apetala <\/em>and Sonneratia caseolaris<\/em> in Thai Binh, most of the growth parameters of Sonneratia apetala<\/em> were higher than those of Sonneratia caseolaris<\/em>. Sonneratia apetala<\/em> had very good cold tolerance. In Thanh Hoa, experiencing a record cold spell after planting in early 2016, Sonneratia apetala<\/em> was not as dead as Sonneratia caseolaris<\/em>. In Thua Thien Hue, after 2.5 years of mixed planting Sonneratia apetala<\/em>, Sonneratia caseolaris<\/em> and Rhizophora apiculata<\/em> had a high survival rate (> 90%), Sonneratia apetala <\/em>were with the highest growth of D00<\/sub>, Hvn<\/sub>, Dt<\/sub>.<\/p>\n

Keywords: <\/em><\/strong>Sonneratia apetala<\/em> Buch-Ham, mangrove tree, growing conditions, growth<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A PH\u00c2N B\u00d3N T\u1edaI SINH TR\u01af\u1edeNG KEO TAI T\u01af\u1ee2NG (Acacia mangium<\/em>) 4 N\u0102M TU\u1ed4I T\u1ea0I TR\u1ea0M TH\u1ef0C NGHI\u1ec6M L\u00c2M NGHI\u1ec6P T\u00c2N L\u1ea0C – H\u00d2A B\u00ccNH<\/p>\n

<\/a>Ph\u1ea1m \u0110\u00f4n, L\u00ea V\u0103n Quang, \u0110\u00e0o Th\u1ecb Huy\u1ec1n<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u v\u00e0 Chuy\u1ec3n giao k\u1ef9 thu\u1eadt l\u00e2m sinh<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i Tr\u1ea1m th\u1ef1c nghi\u1ec7m l\u00e2m nghi\u1ec7p T\u00e2n L\u1ea1c, huy\u1ec7n T\u00e2n L\u1ea1c, t\u1ec9nh H\u00f2a B\u00ecnh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y vi\u1ec7c gi\u1eef l\u1ea1i v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c \u0111\u1ec3 hoai m\u1ee5c t\u1ef1 nhi\u00ean k\u1ebft h\u1ee3p v\u1edbi b\u00f3n ph\u00e2n c\u00f3 t\u00e1c \u0111\u1ed9ng t\u00edch c\u1ef1c t\u1edbi sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng \u1edf giai \u0111o\u1ea1n 4 tu\u1ed5i. Sau 4 n\u0103m tr\u1ed3ng, c\u00f4ng th\u1ee9c F2 – b\u00f3n l\u00f3t 150g ph\u00e2n NPK + 300g ph\u00e2n vi sinh\/h\u00f4\u0301 v\u00e0 b\u00f3n l\u1eb7p l\u1ea1i \u1edf n\u0103m th\u1ee9 2 v\u00e0 n\u0103m th\u1ee9 3 l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ed1i v\u1edbi tr\u1ed3ng r\u1eebng Keo tai t\u01b0\u1ee3ng v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh \u0111\u1ea1t 85,2%, \u0111\u01b0\u1eddng k\u00ednh D1,3<\/sub> (cm) \u0111\u1ea1t 12,9 cm, chi\u1ec1u cao Hvn<\/sub> (m) \u0111\u1ea1t 11,5 m, c\u00e2y sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n t\u1ed1t (t\u1ef7 l\u1ec7 c\u00e2y ph\u1ea9m ch\u1ea5t x\u1ea5u ch\u1ec9 chi\u1ebfm 7,6%), l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n v\u1ec1 tr\u1eef l\u01b0\u1ee3ng \u0111\u1ea1t 21,3 m3<\/sup>\/ha\/n\u0103m. C\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n kh\u00e1c (F1 – Bo\u0301n 100g ph\u00e2n NPK + 100g ph\u00e2n vi sinh\/h\u00f4\u0301; F3: B\u00f3n 200g ph\u00e2n NPK\/h\u1ed1; v\u00e0 c\u00f4ng th\u1ee9c \u0111\u1ed1i ch\u1ee9ng kh\u00f4ng b\u00f3n ph\u00e2n) \u0111\u1ea1t t\u1ef7 l\u1ec7 s\u1ed1ng dao \u0111\u1ed9ng 79,6 – 84,3%, \u0111\u01b0\u1eddng k\u00ednh D1,3<\/sub> (cm) dao \u0111\u1ed9ng t\u1eeb 10,1 – 12,0 cm, chi\u1ec1u cao Hvn<\/sub> (m) dao \u0111\u1ed9ng 9,5 – 10,8 m, t\u1ef7 l\u1ec7 c\u00e2y ph\u1ea9m ch\u1ea5t x\u1ea5u dao \u0111\u1ed9ng 9,1 – 22,1%, l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n v\u1ec1 tr\u1eef l\u01b0\u1ee3ng dao \u0111\u1ed9ng t\u1eeb 10,1 – 17,1 m3<\/sup>\/ha\/n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo tai t\u01b0\u1ee3ng, ph\u00e2n b\u00f3n, huy\u1ec7n T\u00e2n L\u1ea1c -t\u1ec9nh H\u00f2a B\u00ecnh<\/td>\n<\/tr>\n

<\/a>Research effect of fertilizer on the growth of Acacia mangium<\/em> in four years in Tan Lac forestry experience station, Hoa Binh province<\/strong><\/p>\n

The research was carried out in Tan Lac forest experience Station, Tan Lac district, Hoa Binh province. The results show that: Keeping organic materials after wood exploiting and using fertilizer have good effect on the growth of Acacia mangium<\/em> in four years. After 4 years, experimental formula F2 (100g NPK + 300g microbiological fertilizer) has best effect on the growth and productivity of Acacia mangium<\/em> with 82.5 percent about survival rate, 12.9 cm about Diameter at breast height, 11.5 m about souring height, the ratio of bad quality trees is 7,6 percent, average amount of growth in reserves is 21.3 m3<\/sup>\/hectare\/year. Other experimental formulas (F1 – 100g NPK + 100g microbiological fertilizer; F3: 200g NPK; and non fertilizer) have their survival rates fluctuate between 79.6 and 84.3 percent; Diameter at breast height fluctuate between 10.1 and 12.0 cm; souring height fluctuate between 9.5 and 10.8 m; the the ratio of bad quality trees fluctuate between 9.1 and 22.1 percent; average amount of growth in reserves fluctuate from 10.1 to 17.1 m3<\/sup>\/hectare\/year.<\/p>\n

Keywords: <\/em><\/strong>Acacia mangium<\/em>, fertilizer, Tan Lac district – Hoa Binh province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U T\u00cdNH CH\u1ea4T L\u00dd, H\u00d3A H\u1eccC \u0110\u1ea4T SAU CANH T\u00c1C N\u01af\u01a0NG R\u1eaaY T\u1ea0I X\u00c3 CHI\u1ec0NG S\u01a0N, HUY\u1ec6N M\u1ed8C CH\u00c2U, T\u1ec8NH S\u01a0N LA<\/p>\n

<\/a>Nguy\u1ec5n Ho\u00e0ng H\u01b0\u01a1ng, Tr\u1ea7n Th\u1ecb Nh\u00e2m, L\u00ea Th\u1ecb Khi\u1ebfu<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/strong><\/p>\n

Canh t\u00e1c n\u01b0\u01a1ng r\u1eaby l\u00e0 m\u1ed9t trong c\u00e1c lo\u1ea1i h\u00ecnh s\u1ea3n xu\u1ea5t n\u00f4ng nghi\u1ec7p kh\u00e1 ph\u1ed5 bi\u1ebfn \u1edf c\u00e1c v\u00f9ng mi\u1ec1n n\u00fai Vi\u1ec7t Nam. M\u1ed9c Ch\u00e2u l\u00e0 m\u1ed9t huy\u1ec7n thu\u1ed9c v\u00f9ng n\u00fai T\u00e2y T\u00e2y B\u1eafc c\u00f3 t\u1eadp qu\u00e1n canh t\u00e1c n\u01b0\u01a1ng r\u1eaby t\u1eeb l\u00e2u \u0111\u1eddi, l\u00e0 nguy\u00ean nh\u00e2n tr\u1ef1c ti\u1ebfp l\u00e0m m\u1ea5t r\u1eebng v\u00e0 suy tho\u00e1i \u0111\u1ea5t. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t l\u00fd, h\u00f3a h\u1ecdc \u0111\u1ea5t sau canh t\u00e1c sau n\u01b0\u01a1ng r\u1eaby t\u1ea1i x\u00e3 Chi\u1ec1ng S\u01a1n, huy\u1ec7n M\u1ed9c Ch\u00e2u, t\u1ec9nh S\u01a1n La cho th\u1ea5y: Dung tr\u1ecdng \u0111\u1ea5t dao \u0111\u1ed9ng t\u1eeb 0,80 – 1,38 g\/cm3<\/sup>, trung b\u00ecnh l\u00e0 1,14 g\/cm3<\/sup>; T\u1ef7 tr\u1ecdng \u0111\u1ea5t bi\u1ebfn \u0111\u1ed9ng t\u1eeb 2,42 – 2,93 g\/cm3<\/sup>, trung b\u00ecnh l\u00e0 2,62 g\/cm3<\/sup>; \u0110\u1ed9 x\u1ed1p t\u01b0\u01a1ng \u1ee9ng c\u1ee7a \u0111\u1ea5t l\u00e0 47,64 – 69,36% v\u1edbi tr\u1ecb trung b\u00ecnh \u0111\u1ea1t 56,64% \u0111\u1ea1t y\u00eau c\u1ea7u c\u1ee7a t\u1ea7ng canh t\u00e1c. \u0110\u1ea5t c\u00f3 ph\u1ea3n \u1ee9ng chua m\u1ea1nh \u0111\u1ebfn trung t\u00ednh (pHKCl<\/sub> t\u1eeb 3,4 – 5,6). H\u1eefu c\u01a1 t\u1ed5ng s\u1ed1 t\u1eeb m\u1ee9c ngh\u00e8o \u0111\u1ebfn gi\u00e0u. H\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng d\u1ec5 ti\u00eau trong \u0111\u1ea5t ph\u1ed5 bi\u1ebfn \u1edf m\u1ee9c r\u1ea5t ngh\u00e8o \u0111\u1ebfn ngh\u00e8o v\u00e0 c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch kh\u00f4ng \u0111\u00e1ng k\u1ec3 gi\u1eefa c\u00e1c th\u1eddi gian b\u1ecf h\u00f3a nghi\u00ean c\u1ee9u: H\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m d\u1ec5 ti\u00eau bi\u1ebfn \u0111\u1ed9ng t\u1eeb 0,76 – 2,05 mg\/100g \u0111\u1ea5t; l\u00e2n d\u1ec5 ti\u00eau \u0111\u1ea1t 0,25 – 0,53 mg\/100g \u0111\u1ea5t; kali d\u1ec5 ti\u00eau l\u00e0 2,52 – 5,15 mg\/100g \u0111\u1ea5t.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Canh t\u00e1c n\u01b0\u01a1ng r\u1eaby, t\u00ednh ch\u1ea5t l\u00fd – h\u00f3a h\u1ecdc \u0111\u1ea5t, x\u00e3 Chi\u1ec1ng S\u01a1n, huy\u1ec7n M\u1ed9c Ch\u00e2u<\/td>\n<\/tr>\n

<\/a>Study on physical and chemical properties after shifting cultivation in Chieng Son commune, Moc Chau district, Son La province<\/strong><\/p>\n

Shifting cultivation is one of the main types of agricultural in the mountain areas of Vietnam. Moc Chau is a district in the Northwestern mountainous region in which shifting cultivation custom has happened regularly. These are direct reasons leading to deforestation and degradation of forest land. The study results of physical and chemical properties of arable land after shifting cultivation in Chieng Son commune, Moc Chau district, Son La province has shown that bulk density is ranging from 0.80 – 1.38 g\/cm3<\/sup> and reaching average at 1.14 g\/cm3<\/sup>. The soil density is from 2.42 – 2.93 g\/cm3<\/sup> with an average value of 2.62 g\/cm3<\/sup>. The soil porosity is 47.64 – 69.36% with an average percentage of 56.64% which is suitable for cultivation. The soil has reaction from strongly acidic to neutral (pHKCl<\/sub> from 3.4 to 5.6). The amount of humus is from the poor to the rich level. The amount of available nutrients in the soil is from very poor to poor and there is no significant difference between the fallow land periods. The amount of available nitrogen is from 0.76 to 2.05 mg\/100g of soil; available phosphorus 0.25 – 0.53 mg\/100g soil; available potassium is from 2.52 – 5.15 mg\/100g of soil.<\/p>\n

Keywords: <\/em><\/strong>Shifting cultivation, physical and chemical properties, Chieng Son commune, Moc Chau province<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>STRUCTURE AND BIODIVERSITY IN SECONDARY FOREST,\u00a0CENTRAL KALIMANTAN, INDONESIA<\/p>\n

<\/a>Novelia Triana1<\/sup>, Bui Manh Hung1<\/sup>, Nisfiatul Hidayat2<\/sup><\/p>\n

1<\/sup>Vietnam National University of Forestry, Xuan Mai, Hanoi, Vietnam.
\n2<\/sup>University of Palangka Raya, Kalimantan Tengah 74874, Indonesia.<\/p>\n\n\n\n\n
SUMMARY<\/strong><\/p>\n

Forest structure plays a very important role in forest management. To understand structure and sustainability of biodiversity in secondary forests, the study used 2 transect plots per location with 20 m width and 500 m length and the distance between transect is 200 m. Each transect line contained 25 subplots (total area per location: 20 \u00b4 500 \u00b4 2 transect = 2 ha). Results showed that fluctuation growth and tree distribution would change due to time after harvesting activity. The density and basal area of forest declined after harvesting but the potential volume of tree production would probably increase after. Overstory has declined up to 31% on average of the remaining forest. Potential standing stock before and after harvesting still contains many Shorea group as the dominant species group which is also the most popular group in timber trading. Adequately standing stock for sustainability forest management has been classified to \u201cGood\u201d criteria based on the regulation of nucleus tree\/ha that must be left in the forest. This research show that the activity of harvesting have been considered to sustainability and effect to forest degradation in terms of the number of trees left.<\/p>\n

Keywords:<\/em><\/strong> Forestry structure, forest sustainability, biodiversity, secondary forest, Kalimantan<\/td>\n<\/tr>\n

<\/a>C\u1ea5u tr\u00fac v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc r\u1eebng th\u1ee9 sinh t\u1ea1i Trung t\u00e2m Kalimantan, Indonesia<\/strong><\/p>\n

C\u1ea5u tr\u00fac r\u1eebng \u0111\u00f3ng m\u1ed9t vai trong r\u1ea5t quan tr\u1ecdng trong c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd r\u1eebng. \u0110\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc t\u1ea1i r\u1eebng th\u1ee9 sinh, nghi\u00ean c\u1ee9u \u0111\u00e3 thi\u1ebft l\u1eadp 2 d\u1ea3i \u00f4, m\u1ed7i d\u1ea3i r\u1ed9ng 20 m, d\u00e0i 500 m, kho\u1ea3ng c\u00e1ch gi\u1eefa hai d\u1ea3i \u00f4 l\u00e0 200 m. M\u1ed7i d\u1ea3i bao g\u1ed3m 25 \u00f4 (20 \u00b4 500 \u00b4 2 d\u1ea3i = 2 ha). K\u1ebft qu\u1ea3 cho th\u1ea5y r\u1eb1ng bi\u1ebfn \u0111\u1ed9ng sinh tr\u01b0\u1edfng v\u00e0 ph\u00e2n b\u1ed1 c\u00e2y b\u1ecb thay \u0111\u1ed5i sau khi khai th\u00e1c. M\u1eadt \u0111\u1ed9 c\u00e2y v\u00e0 ti\u1ebft di\u1ec7n ngang \u0111\u00e3 b\u1ecb gi\u1ea3m sau khai th\u00e1c, nh\u01b0ng th\u1ec3 t\u00edch g\u1ed7 ti\u1ec1m n\u0103ng l\u1ea1i t\u0103ng. T\u1ea7ng c\u00e2y cao \u0111\u00e3 b\u1ecb gi\u1ea3m t\u1edbi 31% so v\u1edbi trung b\u00ecnh c\u1ee7a r\u1eebng c\u00f2n l\u1ea1i. Tr\u1eef l\u01b0\u1ee3ng c\u00e2y \u0111\u1ee9ng ti\u1ec1m n\u0103ng tr\u01b0\u1edbc v\u00e0 sau khai th\u00e1c bao g\u1ed3m nh\u00f3m c\u00e2y Shorea \u0111\u00e2y l\u00e0 lo\u00e0i c\u00e2y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c d\u00f9ng cho th\u01b0\u01a1ng m\u1ea1i g\u1ed7. Tr\u1eef l\u01b0\u1ee3ng c\u00e2y \u0111\u1ee9ng c\u1ea7n thi\u1ebft cho qu\u1ea3n l\u00fd b\u1ec1n v\u1eefng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 t\u1ed1t d\u1ef1a tr\u00ean quy \u0111\u1ecbnh v\u1ec1 s\u1ed1 c\u00e2y trung t\u00e2m c\u1ea7n \u0111\u1ec3 l\u1ea1i trong r\u1eebng. Nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng c\u00e1c ho\u1ea1t \u0111\u1ed9ng khai th\u00e1c \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng t\u1edbi t\u00ednh b\u1ec1n v\u1eefng v\u00e0 suy tho\u00e1i r\u1eebng v\u1ec1 m\u1eb7t s\u1ed1 c\u00e2y ch\u1eeba l\u1ea1i trong r\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>C\u1ea5u tr\u00fac r\u1eebng, b\u1ec1n v\u1eefng r\u1eebng, r\u1eebng th\u1ee9 sinh, Kalimantan<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 CH\u1ea4T L\u01af\u1ee2NG G\u1ed6 \u0110\u1ed0I V\u1edaI D\u00d2NG KEO LAI BV10 V\u00c0 BV16 PH\u1ee4C V\u1ee4 CHO Y\u00caU C\u1ea6U G\u1ed6 X\u1eba<\/p>\n

<\/a>Nguy\u1ec5n B\u1ea3o Ng\u1ecdc, Nguy\u1ec5n Th\u1ecb Ph\u01b0\u1ee3ng, Nguy\u1ec5n V\u0103n \u0110\u1ecbnh, Nguy\u1ec5n \u0110\u1ee9c Th\u00e0nh,
\nHo\u00e0ng V\u0103n Phong, T\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/p>\n

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

keo lai BV10, BV16 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn v\u00e0o n\u0103m 2000 l\u00e0 gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt d\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m t\u1ea1i Ba V\u00ec, H\u00e0 N\u1ed9i. Tuy nhi\u00ean, c\u00e1c d\u00f2ng keo lai n\u00e0y m\u1edbi ch\u1ec9 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc trong g\u1ed7 \u1edf c\u1ea5p \u0111\u1ed9 nh\u1ecf. Cho t\u1edbi nay c\u00e1c d\u00f2ng n\u00e0y v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u00e0 \u0111\u00e1nh gi\u00e1 c\u00e1c \u0111\u1eb7c t\u00ednh v\u1edbi m\u1ee5c \u0111\u00edch ph\u1ee5c v\u1ee5 cho nhu c\u1ea7u g\u1ed7 x\u1ebb. Trong nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 \u0111\u1ed1i v\u1edbi d\u00f2ng keo lai BV10 v\u00e0 BV16 (\u1edf \u0111\u1ed9 tu\u1ed5i 11) ph\u1ee5c v\u1ee5 y\u00eau c\u1ea7u g\u1ed7 x\u1ebb l\u00e0m nguy\u00ean li\u1ec7u cho s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c \u1edf 3 n\u1ed9i dung: (1) \u0110\u00e1nh gi\u00e1 ph\u00e2n h\u1ea1ng ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 tr\u00f2n v\u00e0 g\u1ed7 x\u1ebb; (2) X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch v\u00e0 \u0111\u1ed9 co r\u00fat; (3) \u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng gia c\u00f4ng c\u1ee7a g\u1ed7 keo lai BV10 v\u00e0 BV16. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y g\u1ed7 keo lai BV10 v\u00e0 BV16 kh\u00e1 th\u1eb3ng v\u00e0 \u0111\u1ed9 thon theo chi\u1ec1u d\u00e0i kh\u00fac g\u1ed7 nh\u1ecf. Ph\u1ea7n l\u1edbn g\u1ed7 tr\u00f2n v\u00e0 g\u1ed7 x\u1ebb \u0111\u1ea1t ti\u00eau chu\u1ea9n c\u1ea5p ch\u1ea5t l\u01b0\u1ee3ng A v\u00e0 B. keo lai BV10 v\u00e0 BV16 c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch \u0111\u1ea1t ch\u1ec9 ti\u00eau x\u1ebfp nh\u00f3m III (nh\u00f3m c\u00f3 KLTT trung b\u00ecnh) v\u00e0 c\u00f3 \u0111\u1ed9 co r\u00fat trung b\u00ecnh (n\u1eb1m trong kho\u1ea3ng 10 – 15%). K\u1ebft qu\u1ea3 v\u1ec1 kh\u1ea3 n\u0103ng gia c\u00f4ng cho th\u1ea5y ch\u1ea5t l\u01b0\u1ee3ng gia c\u00f4ng c\u1ee7a 2 lo\u00e0i t\u1ed1t v\u00e0 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u nguy\u00ean li\u1ec7u trong s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> D\u00f2ng keo lai BV10, BV16, ph\u00e2n h\u1ea1ng ch\u1ea5t l\u01b0\u1ee3ng, \u0111\u1ed3 m\u1ed9c<\/td>\n<\/tr>\n

<\/a>Evaluation of the wood quality of acacia hybrid clones BV10 and BV16 used for wood joinery<\/strong><\/p>\n

Acacia hybrids BV10 and BV16 were recognized in 2000 as the advanced-technological varieties based on the test results in Ba Vi, Ha Noi. However, the species have only been assessed at wood physical properties and chemical composition. To date, these Acacia hybrids have not been studied for the aim of sawn timber uses. In this study, the wood qualities of the Acacia hybrid clones BV10 and BV16 (at the age of 11 years olds) were assessed for the use of sawn timber as raw materials for joinery production at three aspects: (1) Classification of the logs and sawn timber; (2) Determination of wood density and shrinkage; (3) Evaluation of the machinability of the Acacia hybrids BV10 and BV16. Results showed that the logs\/billets of Acacia hybrids BV10 and BV16 were relatively straight and the diference between ends of the logs in relation to diameter was small. The majority of the logs and sawn timber of the species was dominated by A and B-grade. The wood density of Acacia hybrids BV10 and BV16 was classified as Group III (the group of medium densites) and as medium shrinkage (within 10 – 15%). The machinability indicated that the two species met the requirements of raw materials for the joinery production.<\/p>\n

Keywords: <\/em><\/strong>Acacia hybrid clones (BV10 and BV16): Acacia mangium<\/em> \u00b4 Acacia auriculiformis<\/em>, quality assessment, wood joinery<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

D\u1ef0 B\u00c1O \u00c1P L\u1ef0C S\u1eec D\u1ee4NG \u0110\u1ea4T R\u1eeaNG C\u1ee6A C\u1ed8NG \u0110\u1ed2NG D\u00c2N C\u01af V\u00c0 GI\u1ea2I PH\u00c1P H\u00c0I H\u00d2A V\u1edaI CH\u1ee8C N\u0102NG R\u1eeaNG PH\u00d2NG H\u1ed8 KR\u00d4NG N\u0102NG, T\u00c2Y NGUY\u00caN<\/p>\n

L\u00ea Minh Ti\u1ebfn1<\/sup>, B\u1ea3o Huy2<\/sup><\/p>\n

1<\/sup><\/em>Ban Qu\u1ea3n l\u00fd r\u1eebng ph\u00f2ng h\u1ed9 Kr\u00f4ng N\u0103ng, t\u1ec9nh \u0110\u1eafk L\u1eafk, 2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/em><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m d\u1ef1 b\u00e1o \u00e1p l\u1ef1c l\u00ean \u0111\u1ea5t r\u1eebng ph\u00f2ng h\u1ed9 v\u00e0 \u0111\u1ec1 xu\u1ea5t gi\u1ea3i ph\u00e1p c\u1ea3 v\u1ec1 ch\u00ednh s\u00e1ch v\u00e0 k\u1ef9 thu\u1eadt canh t\u00e1c \u0111\u1ec3 h\u00e0i h\u00f2a nhu c\u1ea7u s\u1eed d\u1ee5ng \u0111\u1ea5t r\u1eebng v\u1edbi ch\u1ee9c n\u0103ng r\u1eebng ph\u00f2ng h\u1ed9 \u1edf Kr\u00f4ng N\u0103ng. Ti\u1ebfp c\u1eadn c\u00f3 s\u1ef1 tham gia \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ed3ng th\u1eddi thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb 110 h\u1ed9 \u0111\u1ec3 thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh to\u00e1n d\u1ef1 b\u00e1o \u00e1p l\u1ef1c s\u1eed d\u1ee5ng \u0111\u1ea5t r\u1eebng ph\u00f2ng h\u1ed9 c\u1ee7a h\u1ed9 theo c\u00e1c bi\u1ebfn \u1ea3nh h\u01b0\u1edfng trong 10 n\u0103m t\u1edbi. K\u1ebft qu\u1ea3 cho th\u1ea5y: i) Ph\u00e1 r\u1eebng ph\u00f2ng h\u1ed9 \u0111\u1ec3 \u0111\u1ed9c canh d\u1eabn \u0111\u1ebfn \u0111\u00f3i ngh\u00e8o v\u00e0 suy tho\u00e1i m\u00f4i tr\u01b0\u1eddng r\u1eebng l\u00e0 song h\u00e0nh nhau; ii) M\u00f4 h\u00ecnh d\u1ef1 b\u00e1o \u00e1p l\u1ef1c gia t\u0103ng di\u1ec7n t\u00edch canh t\u00e1c l\u00ean \u0111\u1ea5t r\u1eebng ph\u00f2ng h\u1ed9 c\u1ee7a h\u1ed9 trong 10 n\u0103m \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp theo 4 bi\u1ebfn \u1ea3nh h\u01b0\u1edfng cho th\u1ea5y khi Sh1<\/sub>\/Sh11<\/sub> (t\u1ed5ng di\u1ec7n t\u00edch \u0111\u1ea5t c\u1ee7a h\u1ed9 v\u00e0 kh\u1ea9u) c\u00e0ng \u00edt do thi\u1ebfu \u0111\u1ea5t th\u00ec \u00e1p l\u1ef1c c\u00e0ng cao; v\u00e0 khi Sh2\/<\/sub>Sh22<\/sub> (di\u1ec7n t\u00edch \u0111\u1ea5t canh t\u00e1c trong r\u1eebng ph\u00f2ng h\u1ed9 c\u1ee7a h\u1ed9 v\u00e0 kh\u1ea9u) c\u00e0ng nh\u1ecf th\u00ec \u00e1p l\u1ef1c c\u00e0ng nh\u1ecf; iii) Ch\u1ec9 c\u1ea7n \u0111\u01b0a th\u00eam m\u1ed9t s\u1ed1 c\u00e2y th\u00e2n g\u1ed7 l\u00e0 c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n h\u1ec7 th\u1ed1ng canh t\u00e1c \u0111\u1ea5t d\u1ed1c \u1edf l\u01b0u v\u1ef1c ph\u00f2ng h\u1ed9 hi\u1ec7n nay; iv) C\u1ea7n \u0111\u01b0a di\u1ec7n t\u00edch n\u00f4ng l\u00e2m k\u1ebft h\u1ee3p (NLKH) v\u00e0o h\u1ec7 th\u1ed1ng chi tr\u1ea3 ph\u00ed d\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng r\u1eebng \u0111\u1ea7u ngu\u1ed3n v\u00e0 h\u01b0\u1edbng \u0111\u1ebfn chi tr\u1ea3 d\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng t\u00edch l\u0169y carbon \u0111\u1ec3 th\u00fac \u0111\u1ea9y NLKH tr\u00ean \u0111\u1ea5t r\u1eebng ph\u00f2ng h\u1ed9.<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>Canh t\u00e1c \u0111\u1ea5t d\u1ed1c, di d\u00e2n t\u1ef1 do, r\u1eebng ph\u00f2ng h\u1ed9, x\u00e2m canh \u0111\u1ea5t r\u1eebng<\/td>\n<\/tr>\n

Pressure forecast of forest land use from communities and solutions to harmonize with protection forest function in Krong Nang, the Central Highlands<\/strong><\/p>\n

This study aims to predict the pressure on protection forest land and propose solutions both in terms of policies and farming techniques to harmonize the need of forest land use with the protection forest function. The participatory approach was applied at the same time collecting data from 110 households to set up a model to forecast pressure on the use of protection forest land from households in the next 10 years according to the independent variables. As the results: i) Deforestation of protection forests for monoculture leads to poverty and degradation of the forest environment; ii) The model for forecasting the pressure to increase the use of protection forest land from households is established according to four variables, showing that the lower Sh1<\/sub>\/Sh11<\/sub> (the total land area of \u200b\u200ba household and a person), the higher the pressure; and the smaller Sh2<\/sub>\/Sh22<\/sub> (the land area on \u200b\u200bprotection forest land of a households and a person), the lower the pressure; iii) Just adding a few more woody trees to be able to improve the slope farming system in the current protection basin; iv) Agroforestry should be included in payment for forest environmental services and forest carbon sequestration services in the near future to promote practices of agroforestry on protection forest land.<\/p>\n

Keywords: <\/em><\/strong>Cultivation on sloping land, illegal migration, protection forest, and forest land invasion<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U KH\u1ea2 N\u0102NG T\u00cdCH L\u0168Y CARBON R\u1eeaNG V\u1ea6U \u0110\u1eaeNG (Indosasa angustata <\/em>Mc.Clure) T\u1ea0I T\u1ec8NH B\u1eaeC K\u1ea0N<\/p>\n

Ng\u00f4 Xu\u00e2n H\u1ea3i 1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2<\/sup><\/p>\n

\u00a01 <\/sup>Huy\u1ec7n \u1ee7y \u0110\u1ed3ng H\u1ef7, t\u1ec9nh Th\u00e1i Nguy\u00ean
\n\u00a02 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i 3 huy\u1ec7n Ch\u01a1 \u0110\u1ed3n, Na R\u00ec v\u00e0 B\u1ea1ch Th\u00f4ng, t\u1ec9nh B\u1eafc K\u1ea1n. Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u \u00e1p d\u1ee5ng l\u00e0 l\u1eadp \u00f4 ti\u00eau chu\u1ea9n (OTC), gi\u1ea3i t\u00edch c\u00e2y ti\u00eau chu\u1ea9n, ph\u00e2n t\u00edch h\u00e0m l\u01b0\u1ee3ng carbon v\u00e0 x\u1eed l\u00fd s\u1ed1 li\u1ec7u b\u1eb1ng to\u00e1n th\u1ed1ng k\u00ea trong sinh h\u1ecdc. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y h\u00e0m l\u01b0\u1ee3ng carbon trong th\u00e2n kh\u00ed sinh V\u1ea7u \u0111\u1eafng l\u00e0 52,89%, trong th\u00e2n ng\u1ea7m l\u00e0 49,91%, trong c\u00e0nh l\u00e0 49,86% v\u00e0 trong l\u00e1 l\u00e0 47,75%. T\u1ef7 l\u1ec7 quy \u0111\u1ed5i chung t\u1eeb sinh kh\u1ed1i ra carbon c\u00e2y c\u00e1 l\u1ebb V\u1ea7u \u0111\u1eafng l\u00e0 51,9%. L\u01b0\u1ee3ng carbon trong c\u00e2y c\u00e1 l\u1ebb V\u1ea7u \u0111\u1eafng dao \u0111\u1ed9ng t\u1eeb 3,85 kg\/c\u00e2y \u0111\u1ebfn 4,83 kg\/c\u00e2y, trung b\u00ecnh \u0111\u1ea1t 4,05 kg\/c\u00e2y \u1edf c\u1ea5p tu\u1ed5i I; 4,30 kg\/c\u00e2y \u1edf c\u1ea5p tu\u1ed5i II v\u00e0 4,50 kg\/c\u00e2y \u1edf c\u1ea5p tu\u1ed5i III.\u00a0 L\u01b0\u1ee3ng carbon t\u00edch l\u0169y trong l\u00e2m ph\u1ea7n V\u1ea7u \u0111\u1eafng dao \u0111\u1ed9ng t\u1eeb 15,17 t\u1ea5n\/ha \u0111\u1ebfn 32,45 t\u1ea5n\/ha v\u00e0 ph\u1ee5 thu\u1ed9c l\u1edbn v\u00e0o m\u1eadt \u0111\u1ed9 r\u1eebng v\u00e0 \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u. Trung b\u00ecnh 1 ha r\u1eebng V\u1ea7u \u0111\u1eafng \u1edf t\u1ec9nh B\u1eafc K\u1ea1n t\u00edch l\u0169y 23,22 t\u1ea5n carbon, trong \u0111\u00f3 72,2% t\u1eadp trung \u1edf t\u1ea7ng c\u00e2y v\u1ea7u \u0111\u1eafng; 6,6% \u1edf c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i v\u00e0 21,2% \u1edf v\u1eadt r\u01a1i r\u1ee5ng d\u01b0\u1edbi t\u00e1n r\u1eebng. Nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c c\u00e1c m\u00f4 h\u00ecnh d\u1ef1 b\u00e1o l\u01b0\u1ee3ng carbon t\u00edch l\u0169y trong c\u00e2y c\u00e1 l\u1ebb v\u00e0 l\u00e2m ph\u1ea7n V\u1ea7u \u0111\u1eafng d\u1ef1a tr\u00ean c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra r\u1eebng .<\/p>\n

T\u1eeb kh\u00f3a: <\/em><\/strong>L\u01b0\u1ee3ng carbon t\u00edch l\u0169y, V\u1ea7u \u0111\u1eafng, t\u1ec9nh B\u1eafc K\u1ea1n<\/td>\n<\/tr>\n

Research on carbon sequestration\u00a0 of Indosasa angustata <\/em>Mc.Clure in Bac Kan province<\/strong><\/p>\n

Research was carried out in 3 districts: Cho Don, Na Ri and Bach Thong, Bac Kan province. Research methods are temporary sample plots, analytic sample individual trees, carbon content analysis and data analysis by statistical mathematics. Research results show that carbon content of Indosasa angustata<\/em> is 52.89% in above-ground stem, 49.91% in underground stem, 49.86% in branches and 47.75% in leaves. Converted rate from biomass to carbon of Indosasa angustata <\/em>is 51.9%. Total carbon amount of individual tree is from 3.85 kg\/tree to 4.83 kg\/tree, evarage is 4.05 kg\/tree in age class I; 4.30 kg\/tree in age class II and 4.50 kg\/tree in age class III.\u00a0 Total carbon amount of stand veries from 15.17 t\/ha to 32.45 t\/ha and depends greatly on forest density and research location. On everage, 1 ha of Indosasa angustata<\/em> in Bac Kan province accumulates 23.22 tons carbon, of which 72.2% concentrate in Indosasa angustata<\/em> layer; 6.6% in shrub layer and 21.2% in litter layer. A number of models have been established to predict accumulated carbon in indivudual tree and stand of Indosasa angustata<\/em> based on forest inventory parameters.<\/p>\n

Keywords: <\/em><\/strong>Carbon sequestration, Indosasa angustata<\/em> Mc.Clure, Bac Kan province<\/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 4 – 2019 1. \u0110a d\u1ea1ng lo\u00e0i trong chi Lasianthus Jack (Rubiaceae) \u1edf Khu B\u1ea3o t\u1ed3n Thi\u00ean nhi\u00ean H\u00f2n B\u00e0 v\u1edbi ghi nh\u1eadn m\u1edbi m\u1ed9t lo\u00e0i cho h\u1ec7 th\u1ef1c v\u1eadt Vi\u1ec7t Nam Diversity of genus Lasianthus Jack (Rubiaceae) from Hon Ba Nature Reserve with one new records for […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24,45],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1749"}],"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=1749"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1749\/revisions"}],"predecessor-version":[{"id":2400,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1749\/revisions\/2400"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}