{"id":1607,"date":"2018-10-26T12:52:04","date_gmt":"2018-10-26T05:52:04","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1607"},"modified":"2023-11-23T12:25:29","modified_gmt":"2023-11-23T05:25:29","slug":"vietnam-journal-of-forest-science-number-3-2018","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2018\/10\/vietnam-journal-of-forest-science-number-3-2018\/","title":{"rendered":"Vietnam Journal of Forest Science Number 3-2018"},"content":{"rendered":"

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

\n

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 3<\/b> – <\/b>201<\/b>8<\/b><\/b><\/p>\n

\u00a0<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1<\/td>\n\n

Th\u00e0nh ph\u1ea7n lo\u00e0i v\u00e0 sinh c\u1ea3nh th\u1ef1c v\u1eadt Khu B\u1ea3o t\u1ed3n \u0111\u1ea5t ng\u1eadp n\u01b0\u1edbc L\u00e1ng Sen, t\u1ec9nh Long An<\/p>\n<\/td>\n

\n

Species composition and habitat of plants in Lang Sen wetland reserve,
\nLong An province<\/p>\n<\/td>\n

\n

\u0110\u1eb7ng V\u0103n S\u01a1n
\nL\u00ea Pha
\nPh\u1ea1m V\u0103n Ng\u1ecdt
\nNguy\u1ec5n Linh Em
\nNguy\u1ec5n Th\u1ecb Mai H\u01b0\u01a1ng
\nHo\u00e0ng Ngh\u0129a S\u01a1n<\/p>\n<\/td>\n

\n

3<\/p>\n<\/td>\n<\/tr>\n

2<\/td>\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a ch\u1ebf \u0111\u1ed9 ng\u1eadp \u0111\u1ebfn t\u00ednh \u0111a d\u1ea1ng th\u1ef1c v\u1eadt
\nth\u00e2n th\u1ea3o t\u1ea1i Ban Qu\u1ea3n l\u00fd r\u1eebng Tr\u00e0m G\u00e1o Gi\u1ed3ng
\nt\u1ec9nh \u0110\u1ed3ng Th\u00e1p<\/p>\n<\/td>\n

\n

Effect of inundation regime on herbaceous diversity at Gao Giong Melaleuca forest management board
\nDong Thap province<\/p>\n<\/td>\n

\n

L\u00ea H\u1eefu Ph\u00fa
\nNg\u00f4 \u0110\u00ecnh Qu\u1ebf
\nNguy\u1ec5n Ch\u00ed Th\u00e0nh<\/p>\n<\/td>\n

\n

13<\/p>\n<\/td>\n<\/tr>\n

3<\/td>\n\n

M\u1ed9t s\u1ed1 d\u1eabn li\u1ec7u v\u1ec1 th\u1ef1c v\u1eadt v\u00e0 th\u0103m d\u00f2 kh\u1ea3 n\u0103ng nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh lo\u00e0i Th\u00eca l\u00e0 h\u00f3a g\u1ed7 Leonid (Xyloselinum leonidii <\/i>Pimenov & Kljuykov) b\u1eb1ng hom<\/p>\n<\/td>\n

\n

Some botanical information and asexual propagation of (Xyloselinum leonidii <\/i>Pimenov & Kljuykov) from cuttings<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Ph\u01b0\u01a1ng H\u1ea1nh
\nNguy\u1ec5n Sinh Khang
\nL\u00ea Ng\u1ecdc Di\u1ec7p
\nNguy\u1ec5n Qu\u1ed1c B\u00ecnh
\nB\u00f9i Thu H\u00e0
\nV\u0169 Nguy\u1ec5n Huy\u1ec1n Trang<\/p>\n<\/td>\n

\n

22<\/p>\n<\/td>\n<\/tr>\n

4<\/td>\n\n

\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a m\u1ed9t s\u1ed1 gi\u1ed1ng b\u1ea1ch \u0111\u00e0n lai (Eucalyptus urophylla<\/i> \u00b4 Eucalyptus pellita<\/i>) m\u1edbi \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn t\u1ea1i m\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng<\/p>\n<\/td>\n

\n

Growth of recognized Eucalyptus hybrid (Eucalyptus urophylla<\/i> \u00b4 Eucalyptus pellita<\/i>) clones at some plantation models<\/p>\n<\/td>\n

\n

Nguy\u1ec5n H\u1eefu S\u1ef9
\nTr\u1ea7n Th\u1ecb Thanh Th\u00f9y
\nTri\u1ec7u Th\u1ecb Thu H\u00e0
\n\u0110\u1ed7 H\u1eefu S\u01a1n
\nNguy\u1ec5n \u0110\u1ee9c Ki\u00ean
\nv\u00e0 c\u00e1c c\u1ed9ng t\u00e1c vi\u00ean kh\u00e1c<\/p>\n<\/td>\n

\n

31<\/p>\n<\/td>\n<\/tr>\n

5<\/td>\n\n

Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh b\u1eb1ng c\u1ee7 Tam th\u1ea5t g\u1eebng (Stahlianthus thorelii<\/i> Gagnep)<\/p>\n<\/td>\n

\n

Research some techniques to propagate Stahlianthus thorelii<\/i> Gagnep by tubers<\/p>\n<\/td>\n

\n

L\u00ea V\u0103n Quang
\nPhan Th\u1ecb Luy\u1ebfn
\nB\u00f9i Ki\u1ec1u H\u01b0ng<\/p>\n<\/td>\n

\n

40<\/p>\n<\/td>\n<\/tr>\n

6<\/td>\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n t\u1edbi sinh tr\u01b0\u1edfng, h\u00ecnh d\u00e1ng th\u00e2n c\u00e2y c\u1ee7a m\u1ed9t s\u1ed1 d\u00f2ng keo lai \u0111ang \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn \u1edf khu v\u1ef1c \u0110\u00f4ng Nam b\u1ed9<\/p>\n<\/td>\n

\n

Effects of fertilizer on growth, stem form of some Acacia hybrid clones planted popularly in South Eastern region<\/p>\n<\/td>\n

\n

Ph\u1ea1m V\u0103n B\u1ed1n
\nH\u1ed3 T\u1ed1 Vi\u1ec7t<\/p>\n<\/td>\n

\n

49<\/p>\n<\/td>\n<\/tr>\n

7<\/td>\n\n

X\u00e1c \u0111\u1ecbnh l\u1eadp \u0111\u1ecba cho tr\u1ed3ng r\u1eebng kinh t\u1ebf tr\u00ean \u0111\u1ea5t b\u00e3i th\u1ea3i sau khai th\u00e1c than \u1edf
\nQu\u1ea3ng Ninh<\/p>\n<\/td>\n

\n

Determine the site of economic afforestation in waste land after coal mining in Quang Ninh<\/p>\n<\/td>\n

\n

Ng\u00f4 \u0110\u00ecnh Qu\u1ebf
\nL\u00ea \u0110\u1ee9c Th\u1eafng<\/p>\n<\/td>\n

\n

59<\/p>\n<\/td>\n<\/tr>\n

8<\/td>\n\n

S\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 vi\u1ec5n th\u00e1m \u0111\u1ec3 ph\u00e1t hi\u1ec7n suy tho\u00e1i r\u1eebng t\u1ea1i khu d\u1ef1 tr\u1eef sinh quy\u1ec3n th\u1ebf gi\u1edbi Langbiang, L\u00e2m \u0110\u1ed3ng<\/p>\n<\/td>\n

\n

Using remote sensing indices to detect forest degradation in Langbiang world biosphere reserve, Lam Dong province<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Qu\u1ed1c Hi\u1ec7u Ph\u00f9ng V\u0103n Khoa
\nNguy\u1ec5n H\u1ea3i H\u00f2a
\nL\u00ea V\u0103n H\u01b0\u01a1ng\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 L\u00ea V\u0103n S\u01a1n
\nT\u00f4n Th\u1ea5t Minh
\nTr\u01b0\u01a1ng Quang C\u01b0\u1eddng
\nTr\u1ea7n V\u0103n Nam<\/p>\n<\/td>\n

\n

67<\/p>\n<\/td>\n<\/tr>\n

9<\/td>\n\n

T\u00edch h\u1ee3p AHP v\u00e0o GIS \u0111\u1ec3 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 v\u00e0 ti\u1ec1m n\u0103ng ph\u00e1t tri\u1ec3n lo\u00e0i M\u00e2y n\u01b0\u1edbc m\u1ee1 v\u00e0 M\u00e2y n\u01b0\u1edbc ngh\u00e9
\n\u1edf huy\u1ec7n Nam \u0110\u00f4ng, t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf<\/p>\n<\/td>\n

\n

Integration of AHP into GIS to build maps of distribution and development potential for Daemonorops poilanei<\/i> Dransf and D.jenkinsiana<\/i> Mart in natural forests
\nin Nam Dong district,
\nThua Thien Hue province<\/p>\n<\/td>\n

\n

Nguy\u1ec5n V\u0103n L\u1ee3i
\nH\u1ed3 Thanh H\u00e0
\nD\u01b0\u01a1ng V\u0103n Th\u00e0nh<\/p>\n<\/td>\n

\n

83<\/p>\n<\/td>\n<\/tr>\n

10<\/td>\n\n

Nghi\u00ean c\u1ee9u chu\u1ed7i gi\u00e1 tr\u1ecb ng\u00e0nh c\u00f4ng nghi\u1ec7p tre lu\u1ed3ng t\u1ea1i t\u1ec9nh Thanh H\u00f3a<\/p>\n<\/td>\n

\n

Study value chains of luong bamboo industry sector in Thanh Hoa province<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Thanh S\u01a1n
\nTr\u1ea7n Ho\u00e0ng Qu\u00fd
\nHo\u00e0ng Th\u1ecb Nhung
\nTr\u00e2\u0300n H\u00f4\u0300ng V\u00e2n
\nNguy\u1ec5n Th\u1ecb V\u00e2n Anh
\nPh\u1ea1m V\u0103n Vi\u1ec7n
\nZhou Yan
\nYu Hui<\/p>\n<\/td>\n

\n

94<\/p>\n<\/td>\n<\/tr>\n

11<\/td>\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a chi\u1ec1u r\u1ed9ng b\u0103ng ch\u1eb7t, m\u1eadt \u0111\u1ed9 tr\u1ed3ng v\u00e0 ph\u00e2n b\u00f3n \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u00e2y Ch\u00f2 xanh (Terminalia myriocarpa)<\/i> t\u1ea1i v\u00f9ng T\u00e2y B\u1eafc<\/p>\n

\n<\/td>\n

\n

Effects of clearing belt, planting density and fertilizer on growth of Terminalia myriocarpa<\/i> species in the North-Western region<\/p>\n<\/td>\n

\n

\u0110inh C\u00f4ng Tr\u00ecnh,
\nL\u01b0\u01a1ng Th\u1ebf D\u0169ng
\nH\u00e0 V\u0103n Ti\u1ec7p
\nPh\u1ea1m \u0110\u1ee9c Chi\u1ebfn
\nTri\u1ec7u V\u0103n H\u00f9ng<\/p>\n

\n<\/td>\n

\n

105<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u00a0<\/b><\/p>\n

TH\u00c0NH PH\u1ea6N LO\u00c0I V\u00c0 SINH C\u1ea2NH TH\u1ef0C V\u1eacT KHU B\u1ea2O T\u1ed2N \u0110\u1ea4T NG\u1eacP N\u01af\u1edaC L\u00c1NG SEN, T\u1ec8NH LONG AN<\/p>\n

\u0110\u1eb7ng V\u0103n S\u01a1n1*<\/sup>, L\u00ea Pha2<\/sup>, Ph\u1ea1m V\u0103n Ng\u1ecdt2<\/sup>, Nguy\u1ec5n Linh Em3<\/sup>
\nNguy\u1ec5n Th\u1ecb Mai H\u01b0\u01a1ng1<\/sup>, Ho\u00e0ng Ngh\u0129a S\u01a1n1<\/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>Khu B\u1ea3o t\u1ed3n \u0111\u1ea5t ng\u1eadp n\u01b0\u1edbc L\u00e1ng Sen, t\u1ec9nh Long An<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u1edf Khu B\u1ea3o t\u1ed3n \u0111\u1ea5t ng\u1eadp n\u01b0\u1edbc L\u00e1ng Sen c\u00f3 220 lo\u00e0i, 174 chi, 74 h\u1ecd thu\u1ed9c 2 ng\u00e0nh th\u1ef1c v\u1eadt b\u1eadc cao c\u00f3 m\u1ea1ch l\u00e0 ng\u00e0nh D\u01b0\u01a1ng x\u1ec9 (Polypodiophyta) v\u00e0 ng\u00e0nh Ng\u1ecdc lan (Magnoliophyta). T\u00e0i nguy\u00ean th\u1ef1c v\u1eadt c\u00f3 \u00edch c\u0169ng \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea, c\u00f3 5 nh\u00f3m g\u1ed3m: l\u00e0m thu\u1ed1c c\u00f3 119 lo\u00e0i, th\u1ef1c ph\u1ea9m c\u00f3 30 lo\u00e0i, l\u00e0m c\u1ea3nh c\u00f3 11 lo\u00e0i, gia d\u1ee5ng c\u00f3 10 lo\u00e0i v\u00e0 cho g\u1ed7 c\u00f3 8 lo\u00e0i. \u0110\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 3 lo\u00e0i th\u1ef1c v\u1eadt c\u00f3 gi\u00e1 tr\u1ecb b\u1ea3o t\u1ed3n theo s\u00e1ch \u0110\u1ecf Vi\u1ec7t Nam (2007) l\u00e0 C\u00e0 na (Elaeocarpus\u00a0hygrophilus<\/i>), Lau v\u00f4 (Hemisorghum<\/i> mekongense<\/i>) v\u00e0 L\u00faa ma (Oryza\u00a0rufipogon<\/i>). D\u1ea1ng th\u00e2n c\u1ee7a th\u1ef1c v\u1eadt \u0111\u01b0\u1ee3c chia l\u00e0m 6 nh\u00f3m ch\u00ednh l\u00e0 c\u00e2y th\u00e2n th\u1ea3o c\u00f3 153 lo\u00e0i, d\u00e2y leo c\u00f3 19 lo\u00e0i, c\u00e2y b\u1ee5i\/b\u1ee5i tr\u01b0\u1eddn c\u00f3 16 lo\u00e0i, g\u1ed7 l\u1edbn c\u00f3 16 lo\u00e0i, g\u1ed7 nh\u1ecf c\u00f3 14 lo\u00e0i v\u00e0 b\u00e1n k\u00fd sinh c\u00f3 2 lo\u00e0i. \u0110\u1ed3ng th\u1eddi, ghi nh\u1eadn \u0111\u01b0\u1ee3c 4 ki\u1ec3u sinh c\u1ea3nh th\u1ef1c v\u1eadt trong Khu B\u1ea3o t\u1ed3n bao g\u1ed3m: Sinh c\u1ea3nh r\u1eebng Tr\u00e0m, Sinh c\u1ea3nh \u0111\u1ed3ng c\u1ecf ng\u1eadp n\u01b0\u1edbc theo m\u00f9a v\u1edbi 6 ki\u1ec3u qu\u1ea7n h\u1ee3p, Sinh c\u1ea3nh lung tr\u1ea5p v\u1edbi 3 ki\u1ec3u qu\u1ea7n h\u1ee3p v\u00e0 Sinh c\u1ea3nh th\u1ef1c v\u1eadt tr\u00ean k\u00eanh r\u1ea1ch v\u1edbi 8 ki\u1ec3u qu\u1ea7n h\u1ee3p.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>\u0110a d\u1ea1ng th\u1ef1c v\u1eadt, L\u00e1ng Sen, sinh c\u1ea3nh th\u1ef1c v\u1eadt, th\u00e0nh ph\u1ea7n lo\u00e0i th\u1ef1c v\u1eadt<\/p>\n

 <\/td>\n<\/tr>\n

Species composition and habitat of plants in Lang Sen wetland reserve, Long An province<\/strong><\/p>\n

The results of plant species composition and habitat of plants in Lang Sen wetland reserve recorded 220 species, 174 genera, 74 families that belonging to the two phyla of vascular plants including Lycopodiophyta<\/i> and Magnoliophyta<\/i>. The plant resources were divided into five groups as follows: (1) medicinal plants with 119 species, (2) vegetables plants with 30 species, (3) ornamental plants with 11 species, (4) household plants with 10 species, and (5) wood plants with 8 species. Besides, 3 species include Elaeocarpus<\/i> hygrophilus,<\/i> Hemisorghum\u00a0mekongense<\/i> and Oryza\u00a0rufipogon<\/i> were listed for conservation in the Vietnam Red Data Book (2007). Life forms of plants were divided into six groups including herbs with 153 species, lianas with 19 species, shrubs with 16 species, big trees with 16 species, small trees with 14 species, and hemiparasites with 2 species. Moreover, 4 habitat of plants were identified in wetland reserve including habitat with Melaleuca forest, habitat with seasonally inundated grasslands (with 6 plant communities), habitat with Lung-Trap (with 3 plant communities) and habitat with plants on canals (with 8 plant communities).<\/p>\n

Keywords: <\/i><\/b>Floral diversity, habitat of plants, Lang Sen, species composition<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ea2NH H\u01af\u1edeNG C\u1ee6A CH\u1ebe \u0110\u1ed8 NG\u1eacP \u0110\u1ebeN T\u00cdNH \u0110A D\u1ea0NG TH\u1ef0C V\u1eacT TH\u00c2N TH\u1ea2O\u00a0T\u1ea0I BAN QU\u1ea2N L\u00dd R\u1eeaNG TR\u00c0M G\u00c1O GI\u1ed2NG T\u1ec8NH \u0110\u1ed2NG TH\u00c1P<\/p>\n

L\u00ea H\u1eefu Ph\u00fa1<\/sup>, Ng\u00f4 \u0110\u00ecnh Qu\u1ebf2<\/sup>, Nguy\u1ec5n Ch\u00ed Th\u00e0nh1<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u r\u1eebng v\u00e0 \u0110\u1ea5t ng\u1eadp n\u01b0\u1edbc
\n<\/b>2<\/sup>H\u1ed9i khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/b><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb th\u00e1ng 12 n\u0103m 2014 \u0111\u1ebfn th\u00e1ng 10 n\u0103m 2015 (L\u1ea7n 1: Cu\u1ed1i m\u00f9a l\u0169 (th\u00e1ng 12 n\u0103m 2014); L\u1ea7n 2: Gi\u1eefa m\u00f9a kh\u00f4 (th\u00e1ng 4- 6 n\u0103m 2015); L\u1ea7n 3: \u0110\u1ea7u m\u00f9a l\u0169 (th\u00e1ng 9 – 10 n\u0103m 2015)) t\u1ea1i Ban qu\u1ea3n l\u00fd r\u1eebng tr\u00e0m G\u00e1o Gi\u1ed3ng nh\u1eb1m \u0111\u00e1nh gi\u00e1 t\u00ednh \u0111a d\u1ea1ng th\u1ef1c v\u1eadt th\u00e2n th\u1ea3o theo m\u00f9a v\u00e0 theo ch\u1ebf \u0111\u1ed9 ng\u1eadp. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y v\u00f9ng nghi\u00ean c\u1ee9u c\u00f3 6 ch\u1ebf \u0111\u1ed9 ng\u1eadp, c\u00e1c ch\u1ec9 s\u1ed1 \u0111a d\u1ea1ng sinh h\u1ecdc \u0111\u1ec1u c\u00f3 s\u1ef1 thay \u0111\u1ed5i theo m\u00f9a, \u1edf c\u00e1c ch\u1ebf \u0111\u1ed9 ng\u1eadp 1, 2, 3, 5 v\u00e0o m\u00f9a m\u01b0a c\u00f3 t\u00ednh \u0111a d\u1ea1ng cao h\u01a1n m\u00f9a kh\u00f4 v\u00e0 \u1edf ch\u1ebf \u0111\u1ed9 ng\u1eadp 4, 6 v\u00e0o m\u00f9a m\u01b0a l\u1ea1i th\u1ea5p h\u01a1n m\u00f9a kh\u00f4. Trong m\u00f9a kh\u00f4 \u1edf ch\u1ebf \u0111\u1ed9 ng\u1eadp 6 c\u00f3 t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc th\u1ea5p nh\u1ea5t v\u00e0 ch\u1ebf \u0111\u1ed9 ng\u1eadp 5 c\u00f3 t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc cao nh\u1ea5t, trong khi \u0111\u00f3 v\u00e0o m\u00f9a m\u01b0a \u1edf ch\u1ebf \u0111\u1ed9 ng\u1eadp 6 c\u00f3 t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc th\u1ea5p nh\u1ea5t v\u00e0 ch\u1ebf \u0111\u1ed9 ng\u1eadp 4 c\u00f3 t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc cao nh\u1ea5t. V\u00ec v\u1eady c\u1ea7n khoanh v\u00f9ng c\u00e1c \u0111\u1ed3ng c\u1ecf b\u1eb1ng h\u1ec7 th\u1ed1ng \u0111\u00ea bao \u0111\u1ec3 \u0111i\u1ec1u ti\u1ebft n\u01b0\u1edbc \u1edf ch\u1ebf \u0111\u1ed9 ng\u1eadp 5 v\u00e0o m\u00f9a kh\u00f4 v\u00e0 \u1edf ch\u1ebf \u0111\u1ed9 ng\u1eadp 4 v\u00e0o m\u00f9a m\u01b0a.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>Ch\u1ebf \u0111\u1ed9 ng\u1eadp, \u0111a d\u1ea1ng th\u1ef1c v\u1eadt, G\u00e1o Gi\u1ed3ng<\/p>\n

 <\/td>\n<\/tr>\n

Effect of inundation regime on herbaceous diversity at Gao Giong Melaleuca forest management board Dong Thap province<\/strong><\/p>\n

The study was carried out 3 field campaigns from December 2014 to October 2015, the first time in the end of the flooding season (December 2014), the second time in the mid-dry season (from April to June 2015) and the third at the beginning of the flooding season (from September to October 2015) to assess the influence of inundation regime and seasonal to herbaceous diversity. The results show that the study area has 6 inundation regimes. Biodiversity indexes varied with the seasonal, it was lower during the rainy season than during the dry season in the inundation regime 1, 2, 3, and 5. Conversely, in the inundation regime 4 and 6, biodiversity indexes were higher during the dry season than during the rainy season. During the dry season, the diversity was highest in the inundation regime 5 and lowest in the inundation 6, while the diversity was lowest in the inundation regime 6 and highest in the inundation 4 during rainy season. Therefore, it is necessary to localize the grasslands by dike system to regulate water in the inundation regime 5 in dry season and in the inundation regime 4 in rainy season.<\/p>\n

Keywords: <\/i><\/b>Gao Giong, inundation regime, plant diversity<\/p>\n

 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u1ed8T S\u1ed0 D\u1eaaN LI\u1ec6U V\u1ec0 TH\u1ef0C V\u1eacT V\u00c0 TH\u0102M D\u00d2 KH\u1ea2 N\u0102NG NH\u00c2N GI\u1ed0NG V\u00d4 T\u00cdNH LO\u00c0I TH\u00ccA L\u00c0 H\u00d3A G\u1ed6 LEONID (Xyloselinum leonidii<\/i> Pimenov & Kljuykov) B\u1eb0NG HOM<\/p>\n

Nguy\u1ec5n Ph\u01b0\u01a1ng H\u1ea1nh1<\/sup>, Nguy\u1ec5n Sinh Khang1<\/sup>, L\u00ea Ng\u1ecdc Di\u1ec7p1<\/sup>,
\nNguy\u1ec5n Qu\u1ed1c B\u00ecnh2<\/sup>, B\u00f9i Thu H\u00e03<\/sup>, V\u0169 Nguy\u1ec5n Huy\u1ec1n Trang3<\/sup><\/p>\n

1<\/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 (VAST)
\n2<\/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(VAST)
\n3<\/sup>\u0110\u1ea1i h\u1ecdc S\u01b0 ph\u1ea1m H\u00e0 N\u1ed9i<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Lo\u00e0i Th\u00eca l\u00e0 h\u00f3a g\u1ed7 leonid (Xyloselinum leonidii<\/i> Pimenov & Kljuykov) l\u00e0 lo\u00e0i m\u1edbi, \u0111\u1eb7c h\u1eefu c\u1ee7a Vi\u1ec7t Nam, \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 v\u00e0o n\u0103m 2006 b\u1edfi Pimenov & Kljuykov, ph\u00e2n b\u1ed1 \u1edf t\u1ec9nh H\u00e0 Giang. \u0110\u00e2y l\u00e0 lo\u00e0i th\u1ef1c v\u1eadt thu\u1ed9c h\u1ecd Hoa t\u00e1n (Apiaceae), c\u00e2y b\u1ee5i th\u00e2n g\u1ed7, s\u1ed1ng l\u00e2u n\u0103m, cao 0,5 – 1,8 m, l\u00e1 k\u00e9p l\u00f4ng chim 2-3 l\u1ea7n, t\u1eadp trung \u1edf ng\u1ecdn c\u00e2y, x\u1ebfp xen k\u1ebd, h\u00ecnh tam gi\u00e1c, cu\u1ed1ng b\u1eb9 d\u00e0i 1-2 cm; c\u1ee5m hoa \u1edf \u0111\u1ea7u c\u00e0nh, \u0111\u01b0\u1eddng k\u00ednh 10 – 11 cm; qu\u1ea3 nh\u1eb5n, d\u1eb9t, d\u00e0i 6,5 – 6,7 mm, r\u1ed9ng 2,7 – 2,9 mm; ph\u00e2n b\u1ed1 r\u1ea5t r\u1ea3i r\u00e1c d\u01b0\u1edbi t\u00e1n r\u1eebng n\u00fai \u0111\u00e1 v\u00f4i \u1edf \u0111\u1ed9 cao tr\u00ean 1200 m (a.s.l), <\/i>m\u1ecdc <\/i>trong c\u00e1c k\u1ebd \u0111\u00e1 c\u00f3 \u0111\u1ea5t, m\u00f9n. Hi\u1ec7n nay, lo\u00e0i Th\u00eca l\u00e0 h\u00f3a g\u1ed7 leonid \u0111ang b\u1ecb suy gi\u1ea3m v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng v\u00e0 thu h\u1eb9p v\u00f9ng ph\u00e2n b\u1ed1 do b\u1ecb khai th\u00e1c <\/i>m\u1ea1nh v\u00ec m\u1ee5c \u0111\u00edch th\u01b0\u01a1ng m\u1ea1i. K\u1ebft qu\u1ea3 gi\u00e2m hom cho th\u1ea5y, t\u1ef7 l\u1ec7 v\u1eeba n\u1ea3y m\u1ea7m v\u00e0 ra r\u1ec5 \u0111\u1ea1t cao nh\u1ea5t 6,7% khi x\u1eed l\u00fd hom gi\u00e2m v\u1edbi ch\u1ea5t IBA n\u1ed3ng \u0111\u1ed9 1500 ppm<\/i> sau 90 ng\u00e0y gi\u00e2m tr\u00ean gi\u00e1 th\u1ec3 100% c\u00e1t s\u1ea1ch. Trong khi \u0111\u00f3, sau 180 ng\u00e0y hom gi\u00e2m v\u1eeba n\u1ea3y m\u1ea7m v\u00e0 ra r\u1ec5 khi x\u1eed l\u00fd ch\u1ea5t IBA n\u1ed3ng \u0111\u1ed9 1000 ppm v\u00e0 1500 ppm tr\u00ean c\u1ea3 gi\u00e1 th\u1ec3 2 (GT2: <\/i>50% tro ch\u1ea5u + 30% \u0111\u1ea5t + 20% ph\u00e2n tr\u00e2u b\u00f2 hoai) v\u00e0 gi\u00e1 th\u1ec3 3 (GT3: <\/i>50% ch\u1ea5u t\u01b0\u01a1i + 30% \u0111\u1ea5t + 20% ph\u00e2n tr\u00e2u b\u00f2 hoai), nh\u01b0ng \u1edf gi\u00e1 th\u1ec3 3 <\/i>(GT3) s\u1eed d\u1ee5ng IBA (1500 ppm) t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t cao nh\u1ea5t l\u00e0 8,9 <\/i>chi\u1ec1u d\u00e0i r\u1ec5 \u0111\u1ea1t 5,5 cm, s\u1ed1 r\u1ec5 trung b\u00ecnh \u0111\u1ea1t 5,6 r\u1ec5\/hom. Lo\u1ea1i hom k\u1ec1 ng\u1ecdn cho t\u1ef7 l\u1ec7 ra r\u1ec5 v\u00e0 n\u1ea3y ch\u1ed3i cao nh\u1ea5t l\u00e0 10% v\u00e0 chi\u1ec1u cao c\u1ee7a ch\u1ed3i \u0111\u1ea1t 12,3% khi x\u1eed l\u00fd hom gi\u00e2m v\u1edbi ch\u1ea5t IBA n\u1ed3ng \u0111\u1ed9 1500 ppm gi\u00e2m tr\u00ean gi\u00e1 th\u1ec3 3 <\/i>(GT3: <\/i>50% ch\u1ea5u t\u01b0\u01a1i + 30% \u0111\u1ea5t + 20% ph\u00e2n tr\u00e2u b\u00f2 hoai).<\/i><\/p>\n

T\u1eeb kh\u00f3a: Gi\u00e2m c\u00e0nh, IBA, Th\u00eca l\u00e0 h\u00f3a g\u1ed7 leonid<\/p>\n

 <\/td>\n<\/tr>\n

Some botanical information and asexual propagation of (Xyloselinum leonidii<\/i> Pimenov & Kljuykov) from cuttings<\/strong><\/p>\n

Xyloselinum leonidii<\/i> Pimenov & Kljuykov, a new and endemic species for the flora of Vietnam belongs to Apiaceae family, described by Pimenov & Kljuykov in 2006: perennial woody shrub, 0.5-1.8 m tall; leaves densely crowded at the stem apices, 2-3-pin-natisect, basal segments petiolulate, with petiolules 1-2 cm long, alternate, tripinnate; upper branches, bearing umbels, 10 – 11 cm in diameter; fruits glabrous, 6.5-6.7 mm long, 2.8-3.0 mm wide, elongato-lanceolate in outline. The species has restricted distribution under forest canopy, on limestone mountains at an altitude over 1,200 m (a.s.l), grows in rocky niches with soil, humus. Now, over-exploition for commercial purposes so numbers of species decreased and distribution narrowed, their genetic resources have been seriously threatened. The results of cutting Xyloselinum leonidii<\/i> showed that the highest germination and rooting rates (6.7%) in combination with IBA concentration 1500 ppm after 90 days in the substrates 100% clean sand. Both germination and rooting rates occurrent in combination with IBA concentration 1000 ppm and 1500 ppm after 180 days in the substrates 2 (GT2: 50% rice husk ash + 30% soil + 20% cattle compost) and 3 (GT3: 50% rice husk + 30% soil + 20% cattle compost) but in substrates 3 (GT3): the highest root number of Xyloselinum leonidii<\/i> cutting (8.9%), root height (5.5 cm) and medium root number 5.6 root\/cutting. The results of cutting types (softwood, semi – hardwood, and hardwood) Xyloselinum leonidii<\/i> showed that: <\/i>the highest germination and rooting rates of semi – hardwood (10%) and shoot height (12.3%) in <\/i>combination with IBA concentration 1500 ppm in the substrates 3 (GT3: 50% rice husk + 30% soil + 20% cattle compost, while no rooted cuttings were found in the types softwood.<\/i><\/p>\n

Keywords: <\/i><\/b>Propagation, IBA, <\/i>Xyloselinum leonidii<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u00c1NH GI\u00c1 KH\u1ea2 N\u0102NG SINH TR\u01af\u1edeNG C\u1ee6A M\u1ed8T S\u1ed0 GI\u1ed0NG B\u1ea0CH \u0110\u00c0N LAI (Eucalyptus urophylla<\/i> \u00b4 Eucalyptus pellita<\/i>) M\u1edaI \u0110\u01af\u1ee2C C\u00d4NG NH\u1eacN T\u1ea0I M\u1ed8T S\u1ed0 M\u00d4 H\u00ccNH R\u1eeaNG TR\u1ed2NG<\/p>\n

Nguy\u1ec5n H\u1eefu S\u1ef9, Tr\u1ea7n Th\u1ecb Thanh Th\u00f9y, Tri\u1ec7u Th\u1ecb Thu H\u00e0, \u0110\u1ed7 H\u1eefu S\u01a1n, Nguy\u1ec5n \u0110\u1ee9c Ki\u00ean v\u00e0 c\u00e1c c\u1ed9ng t\u00e1c vi\u00ean kh\u00e1c<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n \u0111\u01b0\u1ee3c tr\u1ed3ng t\u1ea1i Y\u00ean B\u00e1i, H\u00e0 N\u1ed9i, B\u1eafc Giang v\u00e0 B\u00ecnh \u0110\u1ecbnh v\u00e0o n\u0103m 2014 \u0111\u00e3 s\u1eed d\u1ee5ng 5 d\u00f2ng b\u1ea1ch \u0111\u00e0n lai \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn gi\u1ed1ng TBKT l\u00e0 UP35, UP54, UP72, UP95 v\u00e0 UP99. T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng sau 36 th\u00e1ng \u0111\u1ea1t tr\u00ean 90%. N\u0103ng su\u1ea5t c\u00e1c gi\u1ed1ng b\u1ea1ch \u0111\u00e0n lai \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u01b0\u01a1ng \u0111\u1ed1i cao (UP35, UP54, UP72, UP95, UP99), dao \u0111\u1ed9ng t\u1eeb 20,5 \u0111\u1ebfn 28,6 m3<\/sup>\/ha\/n\u0103m trong khi c\u00e1c gi\u1ed1ng b\u1ea1ch \u0111\u00e0n ki\u1ec3m ch\u1ee9ng PN14, U6, U891 v\u00e0 h\u1ea1t s\u1ea3n xu\u1ea5t \u0111\u1ea1i tr\u00e0 ch\u1ec9 \u0111\u1ea1t 13 – 15,9 m3<\/sup>\/ha\/n\u0103m. Ch\u1ebf \u0111\u1ed9 b\u00f3n ph\u00e2n \u1ea3nh h\u01b0\u1edfng t\u1edbi sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n 3 tu\u1ed5i t\u1ea1i Ba V\u00ec, H\u00e0 N\u1ed9i, n\u0103ng su\u1ea5t cao nh\u1ea5t \u0111\u1ea1t 31,5 m3<\/sup>\/ha\/n\u0103m v\u1edbi c\u00f4ng th\u1ee9c b\u00f3n l\u00f3t 400 g ph\u00e2n l\u00e2n nung ch\u1ea3y c\u00f9ng 40 g ph\u00e2n kali v\u00e0 b\u00f3n th\u00fac 45 g \u0111\u1ea1m urea sau tr\u1ed3ng 1 th\u00e1ng; 90 g \u0111\u1ea1m urea \/h\u1ed1 \u1edf giai \u0111o\u1ea1n sau tr\u1ed3ng r\u1eebng 3 th\u00e1ng v\u00e0 130 g \u0111\u1ea1m urea \/h\u1ed1 \u1edf giai \u0111o\u1ea1n sau tr\u1ed3ng r\u1eebng 12 th\u00e1ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>B\u1ea1ch \u0111\u00e0n lai, m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng, n\u0103ng su\u1ea5t, ph\u00e2n b\u00f3n<\/p>\n

 <\/td>\n<\/tr>\n

Growth of recognized eucalyptus hybrid (Eucalyptus urophylla<\/i> \u00b4 Eucalyptus pellita<\/i>) clones at some plantation models<\/strong><\/p>\n

The four Eucalyptus <\/i>plantation models were planted in 2014 in Yen Bai, Ha Noi, Bac Giang and Binh Dinh provinces with five Eucalyptus hybrid <\/i>(E. urophylla<\/i> \u00b4 E. pellita<\/i>) clones recognized as technically advanced varieties: UP35, UP54, UP72, UP95, UP99. The survival rates of all plantation models were >90% after 36 months. At all models, there were significant differences in diameter at breast height and height between the UP clones and other clones. The productivity of UP35, UP54, UP72, UP95, UP99 clones ranged from 20.52 to 28.58 m3<\/sup>\/ha\/year while the productivity of PN14, U6, U891 clones and Eucalyptus <\/i>seeds achieved 13 to 15.87 m3<\/sup>\/ha\/year at age 3 years. At Ba Vi (Hanoi), fertilizer treatment had significant effects on diameter at breast height, height and the productivity of 3-year-old plantation. The fertilizer application with basal fertilizer of 400 g Fused Calcium Magnesium Phosphate + 40 g Potassium fertilizer; top – dressing fertilizer of 45 g Nitrogen Fertilizer Urea per tree (after planting 1 months), 90 g Nitrogen Fertilizer Urea per tree (after planting 3 months), 130 g Nitrogen Fertilizer Urea per tree (after planting 12 months) had the highest productivity (31.5 m3<\/sup>\/ha\/year); the common fertilizer application had the lowest productivity (23.4 m3<\/sup>\/ha\/year).<\/p>\n

Keywords: <\/i><\/b>Eucalyptus hybrid, plantation model, productivity, fertilizer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U M\u1ed8T S\u1ed0 BI\u1ec6N PH\u00c1P K\u1ef8 THU\u1eacT NH\u00c2N GI\u1ed0NG V\u00d4 T\u00cdNH B\u1eb0NG C\u1ee6 TAM TH\u1ea4T G\u1eeaNG (Stahlianthus thorelii<\/i> Gagnep)<\/p>\n

L\u00ea V\u0103n Quang, Phan Th\u1ecb Luy\u1ebfn, B\u00f9i Ki\u1ec1u H\u01b0ng<\/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<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i th\u00f4n H\u1ee3p S\u01a1n, x\u00e3 Ba V\u00ec, huy\u1ec7n Ba V\u00ec, th\u00e0nh ph\u1ed1 H\u00e0 N\u1ed9i. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ru\u1ed9t b\u1ea7u dao \u0111\u1ed9ng 77,8 – 95,6% \u1edf 1 th\u00e1ng tu\u1ed5i, v\u00e0 69,9 – 93,3% \u1edf 2 th\u00e1ng tu\u1ed5i. Sinh tr\u01b0\u1edfng c\u00e2y con trong c\u00e1c c\u00f4ng th\u1ee9c ru\u1ed9t b\u1ea7u dao \u0111\u1ed9ng 17,4 – 26,5 cm v\u1ec1 chi\u1ec1u cao, 2,5 – 4,3 v\u1ec1 s\u1ed1 l\u00e1\/nh\u00e1nh, 9,8 – 14,3 cm v\u1ec1 chi\u1ec1u d\u00e0i l\u00e1 v\u00e0 t\u1ef7 l\u1ec7 c\u00e2y ph\u1ea9m ch\u1ea5t x\u1ea5u dao \u0111\u1ed9ng 5,1 – 10,3%. T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng dao \u0111\u1ed9ng 75,6 – 98,9% \u1edf 1 th\u00e1ng tu\u1ed5i, v\u00e0 66,7 – 87,8% \u1edf 2 th\u00e1ng tu\u1ed5i. Sinh tr\u01b0\u1edfng c\u00e2y con trong c\u00e1c c\u00f4ng th\u1ee9c ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng dao \u0111\u1ed9ng 18,3 – 26,1 cm v\u1ec1 chi\u1ec1u cao, 2,7 – 3,7 v\u1ec1 s\u1ed1 l\u00e1\/nh\u00e1nh, 10,3 – 14,2 cm v\u1ec1 chi\u1ec1u d\u00e0i l\u00e1 v\u00e0 t\u1ef7 l\u1ec7 c\u00e2y ph\u1ea9m ch\u1ea5t x\u1ea5u dao \u0111\u1ed9ng 4,3 – 12,3%; h\u1ec7 s\u1ed1 nh\u00e2n gi\u1ed1ng \u0111\u1ea1t 0,99 – 2,0 l\u1ea7n. T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c che s\u00e1ng dao \u0111\u1ed9ng 77,8 – 95,6% \u1edf 1 th\u00e1ng tu\u1ed5i, v\u00e0 64,4 – 90,0% \u1edf 2 th\u00e1ng tu\u1ed5i. Sinh tr\u01b0\u1edfng c\u00e2y con trong c\u00e1c c\u00f4ng th\u1ee9c che s\u00e1ng dao \u0111\u1ed9ng 15,9 – 26,3 cm v\u1ec1 chi\u1ec1u cao, 2,5 – 3,7 v\u1ec1 s\u1ed1 l\u00e1\/nh\u00e1nh, 10,2 – 16,3 cm v\u1ec1 chi\u1ec1u d\u00e0i l\u00e1 v\u00e0 t\u1ef7 l\u1ec7 c\u00e2y ph\u1ea9m ch\u1ea5t x\u1ea5u dao \u0111\u1ed9ng 8,6 – 20,2%. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai cho th\u1ea5y, th\u00e0nh ph\u1ea7n h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u 90% \u0111\u1ea5t (t\u1ea7ng A + B) + 9% ph\u00e2n chu\u1ed3ng hoai + 1% NPK; ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng b\u1eb1ng c\u1eaft \u0111o\u1ea1n c\u1ee7 mang 2 – 3 m\u1eaft m\u1ea7m v\u00e0 che s\u00e1ng 50% l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ed1i v\u1edbi nh\u00e2n gi\u1ed1ng Tam th\u1ea5t g\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>Nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh b\u1eb1ng c\u1ee7, Tam th\u1ea5t g\u1eebng<\/td>\n<\/tr>\n

 <\/p>\n

Research some techniques to propagate Stahlianthus thorelii<\/i> Gagnep by tubers<\/strong><\/p>\n

The research was carried out in Hop Son village, Ba Vi commune, Ba Vi district, Ha Noi city. The results show that: Survival of potting medium formulas fluctuated between 77.8% and 95.6% in the first month, 69.9% and 93.3% in the second month. Growing seedlings in potting medium formulas fluctuated from 17.4 cm to 26.5 cm in height, 2.5 to 4.3 leaves\/branches, 9.8 to 14.3 cm in leaf length. Rate of poor quality plants fluctuated between 5.1% and 10.3%. Survival of multiplication methods fluctuated between 75.6% and 98.9% in the first month, 66.7% and 87.8% in the second month. Growing seedlings in potting medium formulas fluctuated from 18.3 cm to 26.1 cm in height, 2.7 to 3.7 leaves\/branches, 10.3 to 14.2 cm in leaf length; Rate of poor quality plants fluctuated between 4.3% and 12.3%; multiplication coefficient was from 0.99 to 2.0 times. Survival of the shading formula fluctuated between 77.8% and 95.6% in the first month, 64.4% and 90.0% in the second month. Growing seedlings in potting medium formulas fluctuated from 15.9 cm to 26.3 cm in height, 2.5 to 3.7 leaves\/branches, 10.2 to 16.3 cm in leaf length; Rate of poor quality plants fluctuated between 8.6% and 20.2%. The results of the analysis showed variance: 90% of soil mix (layer A + B) + 9% of decomposed manure + 1% of NPK; Propagation with 2 – 3 germination and 50% glaucoma is best suited for Stahlianthus thorelii<\/i> Gagnep propagation.<\/p>\n

Keywords: <\/i><\/b>Propagation by tubers, Stahlianthus thorelii Gagnep<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ea2NH H\u01af\u1edeNG C\u1ee6A PH\u00c2N B\u00d3N T\u1edaI SINH TR\u01af\u1edeNG, H\u00ccNH D\u00c1NG TH\u00c2N C\u00c2Y C\u1ee6A M\u1ed8T S\u1ed0 D\u00d2NG KEO LAI \u0110ANG \u0110\u01af\u1ee2C TR\u1ed2NG PH\u1ed4 BI\u1ebeN \u1ede KHU V\u1ef0C \u0110\u00d4NG NAM B\u1ed8<\/p>\n

Ph\u1ea1m V\u0103n B\u1ed1n, H\u1ed3 T\u1ed1 Vi\u1ec7t<\/p>\n

Trung t\u00e2m \u1ee8ng d\u1ee5ng Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Nam b\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Ph\u00e2n b\u00f3n v\u00e0 gi\u1ed1ng l\u00e0 2 trong s\u1ed1 nh\u1eefng nh\u00e2n t\u1ed1 quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng t\u1edbi sinh tr\u01b0\u1edfng, n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng. M\u1ed9t th\u00ed nghi\u1ec7m 2 nh\u00e2n t\u1ed1 (ph\u00e2n b\u00f3n v\u00e0 gi\u1ed1ng) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo ki\u1ec3u \u00f4 ch\u00ednh – ph\u1ee5, v\u1edbi 3 l\u1ea7n l\u1eb7p l\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp nh\u1eb1m \u0111\u00e1nh gi\u00e1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n t\u1edbi sinh tr\u01b0\u1edfng, h\u00ecnh d\u00e1ng th\u00e2n c\u00e2y c\u1ee7a m\u1ed9t s\u1ed1 d\u00f2ng keo lai \u0111ang \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn \u1edf khu v\u1ef1c \u0110\u00f4ng Nam b\u1ed9. Th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n g\u1ed3m 2 nghi\u1ec7m th\u1ee9c F-0 (kh\u00f4ng b\u00f3n), F-H (b\u00f3n 16 g N, 45 g P v\u00e0 8 g K\/c\u00e2y); th\u00ed nghi\u1ec7m v\u1ec1 gi\u1ed1ng g\u1ed3m 10 d\u00f2ng keo lai l\u00e0: BV10, BV16, BV32, BV33, TB1, TB6, TB11, TB12, AH1 v\u00e0 AH7. K\u1ebft qu\u1ea3 cho th\u1ea5y, ph\u00e2n b\u00f3n \u1ea3nh h\u01b0\u1edfng c\u00f3 \u00fd ngh\u0129a \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u00e2y keo lai, nh\u01b0ng s\u1ef1 \u1ea3nh h\u01b0\u1edfng gi\u1ea3m nhanh theo th\u1eddi gian (sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh D1.3<\/sub> \u1edf 12 th\u00e1ng tu\u1ed5i c\u1ee7a F-0 v\u00e0 F-H l\u1ea7n l\u01b0\u1ee3t l\u00e0 1,8 cm v\u00e0 2,6 cm, nh\u01b0ng \u1edf 36 th\u00e1ng tu\u1ed5i s\u1ef1 kh\u00e1c bi\u1ec7t kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c duy tr\u00ec, \u0111\u1ec1u b\u1eb1ng 11,2 cm). Ph\u00e2n b\u00f3n \u1ea3nh h\u01b0\u1edfng kh\u00f4ng c\u00f3 \u00fd ngh\u0129a t\u1edbi h\u00ecnh th\u00e2n c\u00e2y c\u0169ng nh\u01b0 t\u1ec9 l\u1ec7 c\u00e2y b\u1ecb b\u1ec7nh; Sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, h\u00ecnh d\u00e1ng th\u00e2n c\u00e2y v\u00e0 t\u1ec9 l\u1ec7 c\u00e2y b\u1ecb b\u1ec7nh gi\u1eefa c\u00e1c d\u00f2ng, \u1edf th\u1eddi \u0111i\u1ec3m 36 th\u00e1ng tu\u1ed5i l\u00e0 c\u00f3 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t, 5 d\u00f2ng sinh tr\u01b0\u1edfng nhanh l\u00e0 AH1, BV10, TB12, BV33 v\u00e0 TB6, sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh (l\u1ea7n l\u01b0\u1ee3t l\u00e0 12,1; 12,0; 11,7; 11,5; v\u00e0 11,4 cm). Trong \u0111\u00f3, AH1, BV33 v\u00e0 TB6 c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y t\u1ed1t h\u01a1n d\u00f2ng BV10 v\u00e0 TB12, d\u00f2ng c\u00f3 kh\u1ea3 n\u0103ng kh\u00e1ng b\u1ec7nh t\u1ed1t l\u00e0 BV10 v\u00e0 AH1 (t\u1ec9 l\u1ec7 c\u00e2y b\u1ecb b\u1ec7nh l\u1ea7n l\u01b0\u1ee3t l\u00e0 1,7 v\u00e0 3,3% so v\u1edbi 15 – 21,7% c\u1ee7a 3 d\u00f2ng c\u00f2n l\u1ea1i); sinh tr\u01b0\u1edfng c\u1ee7a d\u00f2ng AH7 trong th\u00ed nghi\u1ec7m n\u00e0y l\u00e0 ch\u1eadm, \u0111\u01b0\u1eddng k\u00ednh ch\u1ec9 \u0111\u1ea1t 9,9 cm \u1edf 36 th\u00e1ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>Keo lai, ph\u00e2n b\u00f3n, sinh tr\u01b0\u1edfng, h\u00ecnh d\u00e1ng th\u00e2n c\u00e2y<\/p>\n

 <\/td>\n<\/tr>\n

Effects of fertilizer on growth, stem form of some Acacia hybrid clones planted popularly in South Eastern region<\/strong><\/p>\n

Fertilizer and clone are two of important factors affecting productivity of Acacia<\/i> hybrid platation. A two-factor experiment disigned as sub-split plot with three replications aimed to understand effects of fertilizer on growth, stem form of acacia<\/i> hybrid clones planted popularly in Southeastern region. Fertilizer treatments include F-0 (no fertilizer) and F-H (16 g N, 45 g P v\u00e0 8 g K tree-1<\/sup>); clone treatments were ten acacia<\/i> hybrid: BV10, BV16, BV32, BV33, TB1, TB6, TB11, TB12, AH1 and AH7. Results indicated that fertilizer application at planting time significantly affected on tree growth but decreased over time (diameter growth at 12 months in fertilizer treatment F-H and no fertilizer treatment F-0 were 2.6 and 1.8 cm respectily but at 36 months were equal 11.2 cm). Fertilizer had no effect on stem form and rate of diseased trees. There were significant differences in growth, stem form and rate of diseased trees among clones. At 36 months, five faster growing clones were AH1, BV10, TB12, BV33 and TB6, diameter growth (12.1, 12.0, 11.7, 11.5 and 11.4 cm respectively). Of which, AH1, BV33 and TB6 had better stem form than that of BV10 and TB12; BV10 and AH1 tolerated disease well, rate of diseased trees (1.7 and 3.3% respectively comparing that of three other colones were 15 – 21.7%); growth of clone AH7 in this experiment was quite slowly, only reached 9.9 cm in diameter at 36 months.<\/p>\n

Keywords: <\/i><\/b>Acacia hybrid, fertilizer, growth, stem-form<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

X\u00c1C \u0110\u1ecaNH L\u1eacP \u0110\u1ecaA CHO TR\u1ed2NG R\u1eeaNG KINH T\u1ebe TR\u00caN \u0110\u1ea4T B\u00c3I TH\u1ea2I SAU KHAI TH\u00c1C THAN \u1ede QU\u1ea2NG NINH<\/p>\n

Ng\u00f4 \u0110\u00ecnh Qu\u1ebf1<\/sup>, L\u00ea \u0110\u1ee9c Th\u1eafng2<\/sup><\/p>\n

1<\/sup> H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2Vi\u1ec7n Nghi\u00ean c\u1ee9u v\u00e0 Ph\u00e1t tri\u1ec3n V\u00f9ng – B\u1ed9 KH&CN<\/b><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Tr\u00ean c\u01a1 s\u1edf \u0111\u1eb7c \u0111i\u1ec3m khu b\u00e3i th\u1ea3i sau khai th\u00e1c than, m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y c\u1ecf ph\u00e1t tri\u1ec3n t\u1ef1 nhi\u00ean tr\u00ean b\u1ec1 m\u1eb7t b\u00e3i th\u1ea3i, v\u00e0 c\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u00ednh cho v\u00f9ng \u0110\u00f4ng B\u1eafc… B\u00e0i b\u00e1o \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 5 y\u1ebfu t\u1ed1 c\u1ea5u th\u00e0nh nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba \u0111\u1ea5t b\u00e3i th\u1ea3i sau khai th\u00e1c than \u1edf Quang Ninh, bao b\u1ed3m: (i) Th\u1eddi gian sau \u0111\u1ed5 th\u1ea3i; (ii) T\u1ef7 l\u1ec7 \u0111\u1ea5t\/h\u1ed7n h\u1ee3p th\u1ea3i; (iii) \u0110\u1ed9 d\u1ed1c; (iv) \u0110\u1ed9 cao t\u01b0\u01a1ng \u0111\u1ed1i; v\u00e0 (v) Th\u1ea3m th\u1ef1c v\u1eadt ch\u1ec9 th\u1ecb. Qua \u0111\u00f3, \u0111\u1ec1 xu\u1ea5t \u0111\u01b0\u1ee3c c\u01a1 c\u1ea5u c\u00e2y tr\u1ed3ng r\u1eebng kinh t\u1ebf ch\u00ednh v\u00e0 c\u00e2y tr\u1ed3ng ph\u00f9 tr\u1ee3 theo m\u1ee9c \u0111\u1ed9 kh\u00f3 kh\u0103n c\u1ee7a c\u00e1c nh\u00f3m d\u1ea1ng l\u1eadp \u0111\u1ecba nh\u01b0: (a) \u00cdt kh\u00f3 kh\u0103n: Keo lai, Keo tai t\u01b0\u1ee3ng, Th\u00f4ng nh\u1ef1a, Th\u00f4ng m\u00e3 v\u0129, Tre lu\u1ed3ng…; (b) Kh\u00f3 kh\u0103n trung b\u00ecnh: Keo lai, Tre lu\u1ed3ng, Th\u00f4ng nh\u1ef1a, Th\u00f4ng m\u00e3 v\u0129…; v\u00e0 (c) R\u1ea5t kh\u00f3 kh\u0103n: S\u1eafn d\u00e2y d\u1ea1i, b\u00ecm b\u00ecm, le, c\u00e2y h\u1ecd \u0110\u1eadu, k\u1ebft h\u1ee3p c\u00e1c lo\u00e0i keo, \u0111\u1eadu d\u1ea7u, s\u1edf. C\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh \u00e1p d\u1ee5ng ch\u1ee7 y\u1ebfu nh\u01b0: Tr\u1ed3ng thu\u1ea7n lo\u00e0i ho\u1eb7c h\u1ed7n giao theo b\u0103ng, m\u1eadt \u0111\u1ed9 tr\u1ed3ng t\u1eeb 1.660 – 2.500 c\u00e2y\/ha, ti\u00eau chu\u1ea9n c\u00e2y con \u0111em tr\u1ed3ng: Dg\u1ed1c<\/sub> = 0,5 – 0,6 cm, Hvn<\/sub> = 45 – 50 cm; b\u00f3n l\u00f3t 100 – 200 g NPK\/h\u1ed1, k\u1ebft h\u1ee3p 100g ph\u00e2n h\u1eefu c\u01a1 vi sinh v\u00e0 10g ch\u1ea5t gi\u1eef \u1ea9m\/h\u1ed1; ch\u0103m s\u00f3c 2 l\u1ea7n\/n\u0103m, k\u1ebft h\u1ee3p b\u00f3n 100 g NPK\/c\u00e2y\/l\u1ea7n.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>L\u1eadp \u0111\u1ecba, tr\u1ed3ng r\u1eebng kinh t\u1ebf, b\u00e3i th\u1ea3i than, Qu\u1ea3ng Ninh<\/p>\n

 <\/td>\n<\/tr>\n

Determine the site of economic afforestation in waste land after coal mining in Quang Ninh<\/strong><\/p>\n

On the basis of the characteristics of the site after the coal mining, some species of grass grow naturally on the surface of the site, and the main plantation species for the Northeast… The article has identified 5 factors It is a group of landfill sites after coal mining in Quang Ninh, including: (i) Time after discharge; (ii) percentage of land\/mixed waste; (iii) slope; (iv) Relative height; and (v) vegetation indicator. Thereby, the proposed structure of major economic afforestation and auxiliary plant species according to the difficulty of the site type groups: (a) Little difficulty: Acacia hybrid<\/i>, Acacia mangium<\/i> Wild, Pinus merkussi<\/i> J, Pinus massoniana<\/i> Lamb, Bamboo thread<\/i>, etc; (b) Medium difficulty: Acacia hybrid<\/i>, bamboo<\/i>, Pinus merkussi<\/i> J, Pinus massoniana<\/i> Lamb, etc; and (c) Difficulties: Pueraria montana<\/i> (Lour) Merr, Impomaea mauritana<\/i> Jacp, Combination of Acacia, Pongamia pinnata<\/i>, Camellia sasanqua<\/i> Thunb. The main silvicultural techniques applied are as follows: Planting pure or mixed in ice, planting density from 1,660 – 2,500 trees\/ha, seedling standard: Dgoc<\/sub> = 0.5 – 0.6 cm, Hvn<\/sub> = 45 – 50 cm; Apply 100 \u2013 200 g NPK\/hole, combined 100 g microbial organic fertilizer and 10 g humectants\/hole; take care twice a year, combined NPK 100 g\/tree\/time.<\/p>\n

Keywords: <\/i><\/b>Coal discharge, economic afforestation, Site, Quang Ninh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u1eec D\u1ee4NG CH\u1ec8 S\u1ed0 VI\u1ec4N TH\u00c1M \u0110\u1ec2 PH\u00c1T HI\u1ec6N SUY THO\u00c1I R\u1eeaNG T\u1ea0I KHU D\u1ef0 TR\u1eee SINH QUY\u1ec2N TH\u1ebe GI\u1edaI LANGBIANG, L\u00c2M \u0110\u1ed2NG<\/p>\n

Nguy\u1ec5n Qu\u1ed1c Hi\u1ec7u1<\/sup>,Ph\u00f9ng V\u0103n Khoa2<\/sup>, Nguy\u1ec5n H\u1ea3i H\u00f2a2<\/sup>, L\u00ea V\u0103n H\u01b0\u01a1ng3<\/sup>, L\u00ea V\u0103n S\u01a1n3<\/sup>,
\nT\u00f4n Th\u1ea5t Minh3<\/sup>, Tr\u01b0\u01a1ng Quang C\u01b0\u1eddng3<\/sup>, Tr\u1ea7n V\u0103n Nam2<\/sup><\/p>\n

1<\/sup>T\u1ed5ng C\u1ee5c L\u00e2m nghi\u1ec7p, B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n N\u00f4ng th\u00f4n<\/p>\n

\u00a02<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n3<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u Qu\u1ed1c t\u1ebf R\u1eebng nhi\u1ec7t \u0111\u1edbi, L\u00e2m \u0110\u1ed3ng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1eed d\u1ee5ng c\u00f4ng ngh\u00ea\u0323 vi\u00ea\u0303n tha\u0301m va\u0300 GIS trong x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 hi\u1ec7n tr\u1ea1ng r\u1eebng c\u0169ng nh\u01b0 b\u1ea3n \u0111\u1ed3 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng \u0111ang tr\u1edf n\u00ean kh\u00e1 ph\u1ed5 bi\u1ebfn \u1edf Vi\u1ec7t Nam. Nghi\u00ean c\u1ee9u \u0111a\u0303 x\u00e2y d\u01b0\u0323ng tha\u0300nh d\u1ef1 tr\u1eef sinh quy\u1ec3n th\u1ebf gi\u1edbi (DTSQ TG) c\u00f4ng ba\u0309n \u0111\u00f4\u0300 hi\u00ea\u0323n tra\u0323ng r\u01b0\u0300ng n\u0103m 2017 v\u1edbi 5 \u0111\u1ed1i t\u01b0\u1ee3ng s\u1eed d\u1ee5ng \u0111\u1ea5t t\u1ea1i Khu DTSQ TG Langbiang, t\u1ec9nh L\u00e2m \u0110\u1ed3ng, v\u1edbi \u0111\u1ed9 tin c\u1eady 91,5%. Ba ch\u1ec9 s\u1ed1 ch\u1ecdn s\u1ed1 vi\u1ec5n th\u00e1m (NDVI, NBR v\u00e0 IRSI) \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn v\u00e0 t\u00ednh to\u00e1n t\u1ea1i c\u00e1c \u0111i\u1ec3m suy tho\u00e1i r\u1eebng, ng\u01b0\u1ee1ng gi\u00e1 tr\u1ecb c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n s\u1edbm suy tho\u00e1i r\u1eebng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh cho khu v\u1ef1c nghi\u00ean c\u1ee9u v\u1edbi \u0111\u1ed9 tin c\u1eady t\u1eeb 64,4 \u00f7 97,8%. \u0110\u1ed1i v\u1edbi ch\u1ec9 s\u1ed1 NDVI th\u00ec ng\u01b0\u1ee1ng gi\u00e1 tr\u1ecb c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n r\u1eebng b\u1ecb suy tho\u00e1i dao \u0111\u1ed9ng 0,015 \u00f7 0,25, \u0111\u1ed1i v\u1edbi NBR l\u00e0 0,023 \u00f7 0,384, v\u00e0 IRSI l\u00e0 0,038 \u00f7 0,635. K\u1ebft qu\u1ea3 ki\u1ec3m ch\u1ee9ng cho th\u1ea5y vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 vi\u1ec5n th\u00e1m \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1edbm suy tho\u00e1i r\u1eebng c\u00f3 \u0111\u1ed9 tin c\u1eady v\u00e0 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho Khu d\u1ef1 tr\u1eef Sinh quy\u1ec3n Th\u1ebf gi\u1edbi Langbiang, t\u1ec9nh L\u00e2m \u0110\u1ed3ng.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>Bi\u1ebfn \u0111\u1ed9ng, ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt, \u0111\u1ea5t l\u00e2m nghi\u1ec7p, Langbiang, GIS, vi\u1ec5n th\u00e1m, d\u1ef1 tr\u1eef sinh quy\u1ec3n, v\u00f9ng \u0111\u1ec7m<\/p>\n

 <\/td>\n<\/tr>\n

Using remote sensing indices to detect forest degradation in Langbiang world biosphere reserve, Lam Dong province<\/strong><\/p>\n

Using remote sensing and GIS technologies in constructing the status of forest maps as well as changes in extents of forest has become commonly in Vietnam. The study has successfully constructed forest status with five Land use\/Land cover types in 2017 in Langbiang Biosphere Reserve, Lam Dong province. In addition, three remote sesning indices, namely NDVI, NBR and IRSI, were selected and calculated for forest degradation sites; the threshods of early forest degradation detection in Langbiang Biosphere Reserve have determined at accuracy values ranging from 64.4 \u00f7 97.8%. For NDVI, threshold of early forest degradation detection is 0.015 \u00f7 0.25. Thresholds of NBR and IRSI are 0.023 \u00f7 0.384 and 0.038 \u00f7 0.635, respectively. As field-based accuracy assessments, using remote sensing indices (NDVI, NBR and IRSI) for early forest degradation detection is reliable and applicable in Langbiang World Biosphere Reserve, Lam Dong.<\/p>\n

Keywords: <\/i><\/b>Buffer zone, vegetation index, forest change, forest land, GIS, remote sensing, Langbiang, Biosphere Reserve<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u00cdCH H\u1ee2P AHP V\u00c0O GIS \u0110\u1ec2 X\u00c2Y D\u1ef0NG B\u1ea2N \u0110\u1ed2 PH\u00c2N B\u1ed0 V\u00c0 TI\u1ec0M N\u0102NG PH\u00c1T TRI\u1ec2N LO\u00c0I M\u00c2Y N\u01af\u1edaC M\u1ee0 V\u00c0 M\u00c2Y N\u01af\u1edaC NGH\u00c9 \u1ede HUY\u1ec6N NAM \u0110\u00d4NG, T\u1ec8NH TH\u1eeaA THI\u00caN HU\u1ebe<\/p>\n

Nguy\u1ec5n V\u0103n L\u1ee3i, H\u1ed3 Thanh H\u00e0, D\u01b0\u01a1ng V\u0103n Th\u00e0nh<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i H\u1ecdc N\u00f4ng L\u00e2m Hu\u1ebf<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

X\u00e1c \u0111\u1ecbnh v\u00f9ng ph\u00e2n b\u1ed1 v\u00e0 ti\u1ec1m n\u0103ng ph\u00e1t tri\u1ec3n lo\u00e0i M\u00e2y n\u01b0\u1edbc m\u1ee1 (D<\/i>aemonorops poilanei <\/i>J.Dransf) v\u00e0 M\u00e2y n\u01b0\u1edbc ngh\u00e9 (D<\/i>.jenkinsiana <\/i>Mart) nh\u1eb1m cung c\u1ea5p nh\u1eefng c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng hai lo\u00e0i c\u00e2y n\u00e0y trong r\u1eebng t\u1ef1 nhi\u00ean \u1edf huy\u1ec7n Nam \u0110\u00f4ng, t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf. Nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p AHP (Analytic Hierarchy Process) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh tr\u1ecdng s\u1ed1 c\u1ee7a c\u00e1c nh\u00e2n t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ph\u00e2n b\u1ed1 v\u00e0 ti\u1ec1m n\u0103ng ph\u00e1t tri\u1ec3n cho hai lo\u00e0i m\u00e2y l\u1ef1a ch\u1ecdn. C\u00e1c l\u1edbp nh\u00e2n t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch v\u00e0 t\u00edch h\u1ee3p th\u00f4ng qua m\u00f4 h\u00ecnh ph\u1ed1i h\u1ee3p tuy\u1ebfn t\u00ednh c\u00f3 tr\u1ecdng s\u1ed1 d\u1ef1a tr\u00ean c\u01a1 s\u1edf GIS \u0111\u1ec3 thi\u1ebft l\u1eadp b\u1ea3n \u0111\u1ed3 ph\u00e2n b\u1ed1 v\u00e0 ti\u1ec1m n\u0103ng ph\u00e1t tri\u1ec3n cho lo\u00e0i M\u00e2y n\u01b0\u1edbc m\u1ee1 v\u00e0 M\u00e2y n\u01b0\u1edbc ngh\u00e9. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y di\u1ec7n t\u00edch ph\u00f9 h\u1ee3p cho ph\u00e2n b\u1ed1 lo\u00e0i M\u00e2y n\u01b0\u1edbc m\u1ee1 v\u00e0 M\u00e2y n\u01b0\u1edbc ngh\u00e9 t\u01b0\u01a1ng \u1ee9ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 29.475,3 ha (chi\u1ebfm 45,5% t\u1ed5ng di\u1ec7n t\u00edch \u0111\u1ea5t t\u1ef1 nhi\u00ean c\u1ee7a huy\u1ec7n Nam \u0110\u00f4ng) v\u00e0 32.344,9 ha (chi\u1ebfm 50,0%). Di\u1ec7n t\u00edch ti\u1ec1m n\u0103ng ph\u00e1t tri\u1ec3n lo\u00e0i M\u00e2y n\u01b0\u1edbc m\u1ee1 l\u00e0 27476,1 ha (42,5%) v\u00e0 M\u00e2y n\u01b0\u1edbc ngh\u00e9 l\u00e0 28876,4 ha (44,5%).<\/p>\n

T\u1eeb kh\u00f3a: <\/b>AHP, GIS, ph\u00e2n b\u1ed1, ti\u1ec1m n\u0103ng, tr\u1ecdng s\u1ed1, M\u00e2y n\u01b0\u1edbc m\u1ee1, M\u00e2y n\u01b0\u1edbc ngh\u00e9<\/p>\n

 <\/td>\n<\/tr>\n

Integration of AHP into GIS to build maps of distribution and development potential for Daemonorops poilanei<\/i> Dransf and D.jenkinsiana<\/i> Mart in natural forests in Nam Dong district, Thua Thien Hue province<\/strong><\/p>\n

Identification of distribution and development potential zones for two rattan species (Daemonorops poilanei<\/i> Dransf <\/i>and D.jenkinsiana<\/i> Mart) aims to provide scientific bases of these two sustainable rattan development planning in natural forests of Nam Dong district, Thua Thien Hue province. The Analytic Hierarchy Process (AHP) method was used to determine the weight of factors that affected distribution and development potential zones of selected two rattan species (Daemonorops poilanei<\/i> <\/i>Dransf. and D.jenkinsiana<\/i> <\/i>Mart.). The influence layers were analyzed and integrated using GIS -based Weighted Linear Combination model to build maps of distribution and development potential for Daemonorops poilanei<\/i> <\/i>Dransf. <\/i>and D.jenkinsiana<\/i> <\/i>Mart.. The research results showed that the total distribution areas of Daemonorops poilanei<\/i> and D.jenkinsiana<\/i> is 29,475.3 ha (45.5% of total natural area of Nam Dong district) and 32,344.9 ha (50.0%), respectively. The areas of development potential for Daemonorops poilanei<\/i> is 27,476.1 ha (42.5%) and D.jenkinsiana<\/i> is 28,876.4 ha (44.5%).<\/p>\n

Keywords: <\/i><\/b>AHP, distribution, GIS, potential, weight, Daemonorops poilanei J. Dransf, D. jenkinsiana Mart<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U CHU\u1ed6I GI\u00c1 TR\u1eca NG\u00c0NH C\u00d4NG NGHI\u1ec6P TRE LU\u1ed2NG T\u1ea0I T\u1ec8NH THANH H\u00d3A<\/p>\n

Nguy\u1ec5n Thanh S\u01a1n1<\/sup>, Tr\u1ea7n Ho\u00e0ng Qu\u00fd1<\/sup>, Ho\u00e0ng Th\u1ecb Nhung1<\/sup>, Tr\u00e2\u0300n H\u00f4\u0300ng V\u00e2n1<\/sup>,
\nNguy\u1ec5n Th\u1ecb V\u00e2n Anh1<\/sup>, Ph\u1ea1m V\u0103n Vi\u1ec7n2<\/sup>, Zhou Yan3<\/sup>, Yu Hui3<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh, 2 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n3 <\/sup>China National Bambo o Research Center, PR. China<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n ng\u00e0nh c\u00f4ng nghi\u1ec7p tre Lu\u1ed3ng \u1edf t\u1ec9nh Thanh H\u00f3a. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra, ph\u1ecfng v\u1ea5n c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng li\u00ean quan (nh\u00e0 qu\u1ea3n l\u00fd, ch\u1ee7 r\u1eebng, nh\u1eefng ng\u01b0\u1eddi thu mua c\u00e2y v\u00e0 c\u00e1c c\u01a1 s\u1edf ch\u1ebf bi\u1ebfn Lu\u1ed3ng) k\u1ebft h\u1ee3p v\u1edbi vi\u1ec7c \u0111o \u0111\u1ebfm 60 \u00f4 ti\u00eau chu\u1ea9n h\u00ecnh tr\u00f2n v\u1edbi di\u1ec7n t\u00edch 500 m2<\/sup>\/\u00f4 t\u1ea1i r\u1eebng tr\u1ed3ng Lu\u1ed3ng t\u1ea1i 5 huy\u1ec7n g\u1ed3m Ng\u1ecdc L\u1eb7c, Lang Ch\u00e1nh, B\u00e1 Th\u01b0\u1edbc, Quan S\u01a1n v\u00e0 Quan H\u00f3a \u0111\u00e3 cho th\u1ea5y (i) Ngu\u1ed3n thu t\u1eeb b\u00e1n Lu\u1ed3ng c\u00e2y bi\u1ebfn \u0111\u1ed9ng t\u1eeb 5,68 \u0111\u1ebfn 15,38 tri\u1ec7u \u0111\u1ed3ng\/ha\/n\u0103m, (ii) Gia\u0301 tri\u0323 gia t\u0103ng (GTGT)<\/i> b\u1edfi c\u00e1c ho\u1ea1t \u0111\u1ed9ng thu gom mang la\u0323i t\u1eeb 1,25 – 1,66 l\u00e2\u0300n, (iii) C\u00e1c chu\u1ed7i s\u1ea3n ph\u1ea9m ch\u1ebf bi\u1ebfn t\u1eeb Lu\u1ed3ng c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng kh\u00e1c nhau: V\u1edbi c\u00e1c chu\u1ed7i s\u1ea3n ph\u1ea9m s\u1eed d\u1ee5ng nguy\u00ean li\u1ec7u Lu\u1ed3ng c\u00e2y v\u1edbi gi\u00e1 nguy\u00ean li\u1ec7u t\u1eeb 1.000 \u0111\/kg – 1.250 \u0111\/kg th\u00ec chu\u1ed7i s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m Lu\u1ed3ng \u00e9p kh\u1ed1i c\u00f3 GTGT cao nh\u1ea5t t\u1eeb 4,62 – 5,77 l\u1ea7n, ti\u1ebfp \u0111\u1ebfn chu\u1ed7i s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m than ho\u1ea1t t\u00ednh \u1ed1ng GTGT l\u00e0 2,40 – 3,00 l\u1ea7n, chu\u1ed7i s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m \u0111\u0169a tinh c\u00f3 GTGT l\u00e0 2,24 – 2,81 l\u1ea7n va\u0300 chu\u1ed7i s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m \u0111\u0169a th\u00f4 co\u0301 GTGT th\u1ea5p nh\u1ea5t ch\u1ec9 1,04 – 1,31 l\u1ea7n. V\u1edbi c\u00e1c chu\u1ed7i s\u1ea3n xu\u1ea5t s\u1eed d\u1ee5ng nguy\u00ean li\u1ec7u s\u01a1 ch\u1ebf th\u00ec chu\u1ed7i s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m than ho\u1ea1t t\u00ednh s\u1eed d\u1ee5ng m\u1ea5u m\u1eaft c\u00f3 GTGT cao nh\u1ea5t l\u00e0 2,50 – 3,39 l\u1ea7n, ti\u1ebfp \u0111\u1ebfn l\u00e0 chu\u1ed7i s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m b\u1ed9t gi\u1ea5y s\u1eed d\u1ee5ng ph\u00f4i b\u00e0o GTGT l\u00e0 3,24 l\u1ea7n v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 chu\u1ed7i s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m ch\u00e2n h\u01b0\u01a1ng s\u1eed d\u1ee5ng thanh tre kh\u00f4ng m\u1eaft c\u00f3 GTGT ch\u1ec9 1,26 -1,44 l\u1ea7n.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>Chu\u00f4\u0303i gia\u0301 tri\u0323, Lu\u1ed3ng, gia\u0301 tri\u0323 gia t\u0103ng, gia\u0301 tri\u0323 s\u1ea3n ph\u1ea9m, Thanh H\u00f3a<\/p>\n

 <\/td>\n<\/tr>\n

Study value chains of luong bamboo industry sector in Thanh Hoa province<\/strong><\/p>\n

This research was undertaken to promote Luong-bamboo industry sector in Thanh Hoa province.\u00a0The results of interviewing stakeholders (managers, forest owners, merchants and processors) and implementing measurement of 60 standard plots with an area of \u200b\u200b500 m2 <\/sup>\/plot in five districts Ngoc Lac, Lang Chanh, Ba Thuoc, Quan Son and Quan Hoa shown that: (i) The revenue from selling Luong trees ranges from 5.68 to 15.38 million VND per ha\/year, (ii) The added value from buying and selling Luong-bamboo cane is 1.25 – 1.66 times, (iii) The Luong-bamboo product chains have different added values. With the bamboo production chains which use Luong-bamboo cane (buying price from 1,000 – 1,250 VND\/kg), the production chain of the strand woven Luong-bamboo product chain has the highest added value (4.62 – 5.77 times), followed by bamboo charcoal (2.40 – 3.00 times), and the production chain of the completed bamboo chopstick (2.24 – 2.81 times). The production chain of raw chopsticks has the lowest added value (1.04 – 1.31 times). With the production chains which use processed bamboo material, bamboo charcoal using the node-cutting material has the highest added-value (2.50 – 3.39 times), followed by paper pulp using wood shaving by-products which has an added value as high as 3.24 times. The production chain of incense sticks using bamboo slats without cutting has the lowest added-value (1.26 – 1.44 times).<\/p>\n

Keywords: <\/i><\/b>Added-value, Luong-bamboo, product value, Thanh Hoa, Value chain<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ea2NH H\u01af\u1edeNG C\u1ee6A CHI\u1ec0U R\u1ed8NG B\u0102NG CH\u1eb6T, M\u1eacT \u0110\u1ed8 TR\u1ed2NG V\u00c0 PH\u00c2N B\u00d3N \u0110\u1ebeN SINH TR\u01af\u1edeNG C\u00c2Y CH\u00d2 XANH (Terminalia myriocarpa)<\/i> T\u1ea0I V\u00d9NG T\u00c2Y B\u1eaeC<\/p>\n

\u0110inh C\u00f4ng Tr\u00ecnh1<\/sup>, L\u01b0\u01a1ng Th\u1ebf D\u0169ng2<\/sup>, H\u00e0 V\u0103n Ti\u1ec7p1<\/sup>, Ph\u1ea1m \u0110\u1ee9c Chi\u1ebfn3<\/sup>, Tri\u1ec7u V\u0103n H\u00f9ng4<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p T\u00e2y B\u1eafc
\n2<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u L\u00e2m \u0111\u1eb7c s\u1ea3n
\n3<\/sup>Ban \u0110\u00e0o t\u1ea1o v\u00e0 H\u1ee3p t\u00e1c Qu\u1ed1c t\u1ebf, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n4<\/sup>H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1ec3 ph\u1ee5c h\u1ed3i r\u1eebng v\u00e0 tr\u1ed3ng th\u00e2m canh cung c\u1ea5p g\u1ed7 l\u1edbn l\u00e0 m\u1ed9t trong \u0111\u1ecbnh h\u01b0\u1edbng quan tr\u1ecdng trong chi\u1ebfn l\u01b0\u1ee3c ph\u00e1t tri\u1ec3n l\u00e2m nghi\u1ec7p c\u1ee7a Vi\u1ec7t Nam giai \u0111o\u1ea1n 2006-2020. Hi\u1ec7n nay, s\u1ed1 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng v\u00e0 tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t g\u1ed7 l\u1edbn t\u1ea1i Vi\u1ec7t Nam n\u00f3i chung v\u00e0 v\u00f9ng T\u00e2y B\u1eafc n\u00f3i ri\u00eang c\u00f2n r\u1ea5t \u00edt. \u0110\u1ed1i v\u1edbi v\u00f9ng T\u00e2y B\u1eafc 2 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba l\u00e0 Sa m\u1ed9c (Cunninghamia lanceolata<\/i>) v\u00e0 V\u1ed1i thu\u1ed1c (Schima wallichii<\/i>)\u00a0\u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 hai lo\u00e0i c\u00e2y ch\u1ee7 l\u1ef1c cho tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t v\u00e0 trong 23 lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 lo\u00e0i c\u00e2y ch\u1ee7 y\u1ebfu cho tr\u1ed3ng r\u1eebng th\u00ec ch\u1ec9 c\u00f3 10 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba. Do v\u1eady, nghi\u00ean c\u1ee9u b\u1ed5 sung th\u00eam c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u0111\u1ec3 tr\u1ed3ng r\u1eebng t\u1ea1i v\u00f9ng T\u00e2y B\u1eafc l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft g\u00f3p ph\u1ea7n n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u1ed3ng r\u1eebng cung c\u1ea5p g\u1ed7 l\u1edbn. Ch\u00f2 xanh (Terminalia myriocarpa<\/i>) l\u00e0 c\u00e2y g\u1ed7 l\u1edbn b\u1ea3n \u0111\u1ecba c\u00f3 gi\u00e1 tr\u1ecb t\u1ea1i v\u00f9ng T\u00e2y B\u1eafc, nh\u01b0ng ch\u01b0a c\u00f3 nghi\u00ean c\u1ee9u n\u00e0o v\u1ec1 k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng. Nghi\u00ean c\u1ee9u n\u00e0y ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ed9 r\u1ed9ng b\u0103ng ch\u1eb7t, m\u1eadt \u0111\u1ed9 tr\u1ed3ng v\u00e0 l\u01b0\u1ee3ng ph\u00e2n b\u00f3n l\u00f3t \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y Ch\u00f2 xanh. K\u1ebft qu\u1ea3 sau 4,5 n\u0103m tr\u1ed3ng cho th\u1ea5y \u0111\u1ed1i v\u1edbi m\u00f4 h\u00ecnh l\u00e0m gi\u00e0u r\u1eebng b\u1eb1ng Ch\u00f2 xanh, b\u0103ng ch\u1eb7t r\u1ed9ng 4,5m (b\u1eb1ng \u00bd chi\u1ec1u cao t\u00e1n r\u1eebng l\u00e0m gi\u00e0u) l\u00e0 ph\u00f9 h\u1ee3p, c\u00e2y c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 86%, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c 3,86 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn 3,56 m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n 1,87 m. <\/i>M\u1eadt \u0111\u1ed9 tr\u1ed3ng 1.111 c\u00e2y\/ha (c\u1ef1 ly tr\u1ed3ng 3 \u00d7 3 m) l\u00e0 ph\u00f9 h\u1ee3p cho r\u1eebng tr\u1ed3ng th\u00e2m canh, c\u00e2y c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 75%, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c 3,86 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn 3,55 m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n 1,89 m. K\u1ebft qu\u1ea3 sau 3,5 n\u0103m tr\u1ed3ng cho th\u1ea5y li\u1ec1u l\u01b0\u1ee3ng b\u00f3n l\u00f3t 300 g ph\u00e2n NPK (5:10:3)\/h\u1ed1 l\u00e0 ph\u00f9 h\u1ee3p cho tr\u1ed3ng th\u00e2m canh, c\u00e2y c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 81,66%, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c
\n2,42 cm, chi\u1ec1u cao v\u00fat ng\u1ecdn 2,49 m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n 1,53 m.<\/p>\n

T\u1eeb kh\u00f3a: <\/b>Ch\u00f2 xanh, c\u00e2y b\u1ea3n \u0111\u1ecba, T\u00e2y B\u1eafc, tr\u1ed3ng r\u1eebng th\u00e2m canh<\/p>\n

 <\/td>\n<\/tr>\n

\n

Effects of clearing belt, planting density and fertilizer on growth of Terminalia myriocarpa<\/i> species in the North-Western region<\/strong><\/p>\n

Study on using precious and indigenous tree species for enrichment of poor and degraded natural forest and for intensive forest plantation to supply sawlogs is one of important trends in Vietnam forestry development strategy 2006-2020. Currently, the number of indigenous tree species for forest plantation in Vietnam and in the North-Western region is still very limitted. In North-Western region, only two species of Cunninghamia lanceolata<\/i> and Schima wallichii<\/i> were recognized as main indegenous tree species for production forest, and only 10 indegenous tree species of total 23 species were identified for forest plantation. Therefore, study on using indegenous tree species for forest plantation in North-Western region is a very important task that helps to improve the quality of forest plantations and the biodiversify. Terminalia myriocarpa<\/i> is a big precious indigenous tree species in North-Western region, but to date there is no study on techniques to plant this species in the region.\u00a0 This study was conducted to do research on effects of clearing belt, planting density and fertilizer on growth of Terminalia myriocarpa<\/i> species. After 4.5 years planted for enriching degraded forest, the results revealed that the clearing belt of 4.5 m (equilevent 1\/2 of total height of forest) is the best with the survival rate reached 86%, ground diamenter 3.86 cm, total height 3.56 m and diameter canopy 1.87 m. For planting density, the desity of 1,111 trees\/per ha (3 m \u00b4 3 m) is most suitable for intensive forest plantation with the survival rate reached 75%, ground diamenter 3.86 cm, total height 3.55 m and diameter canopy 1.89 m. After 3.5 years planted, the results showed that fertilizing with 300 g of NPK (5:10:3) is the best for forest plantation with the survival rate reached 81.66%, ground diamenter 2.42 cm, total height 2.49 m and diameter canopy 1.53 m.<\/p>\n

Keywords: <\/i><\/b>Northwest, degareded forest, indigenous tree species, intensive forest plantation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n","protected":false},"excerpt":{"rendered":"

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 3 – 2018 \u00a0 1 Th\u00e0nh ph\u1ea7n lo\u00e0i v\u00e0 sinh c\u1ea3nh th\u1ef1c v\u1eadt Khu B\u1ea3o t\u1ed3n \u0111\u1ea5t ng\u1eadp n\u01b0\u1edbc L\u00e1ng Sen, t\u1ec9nh Long An Species composition and habitat of plants in Lang Sen wetland reserve, Long An province \u0110\u1eb7ng V\u0103n S\u01a1n L\u00ea Pha Ph\u1ea1m V\u0103n Ng\u1ecdt Nguy\u1ec5n Linh […]<\/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\/1607"}],"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=1607"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1607\/revisions"}],"predecessor-version":[{"id":1698,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1607\/revisions\/1698"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}