{"id":1573,"date":"2017-11-23T09:58:11","date_gmt":"2017-11-23T02:58:11","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1573"},"modified":"2023-11-23T12:25:30","modified_gmt":"2023-11-23T05:25:30","slug":"vietnam-journal-of-forest-science-number-3-2017","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2017\/11\/vietnam-journal-of-forest-science-number-3-2017\/","title":{"rendered":"Vietnam Journal of Forest Science Number 3-2017"},"content":{"rendered":"

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

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 3 – 201<\/b>7<\/b><\/p>\n

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

\u0110a d\u1ea1ng lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u t\u1ea1i Khu B\u1ea3o t\u1ed3n
\nthi\u00ean nhi\u00ean N\u00e0 H\u1ea9u
\nt\u1ec9nh Y\u00ean B\u00e1i<\/p>\n<\/td>\n

\n

H\u1ed3 Ng\u1ecdc S\u01a1n
\nNguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n
\nNguy\u1ec5n V\u0103n Huy<\/p>\n<\/td>\n

\n

Biodiversity survey of medicinal plants in Na Hau nature reserve, Yen Bai province<\/p>\n<\/td>\n

\n

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

2<\/td>\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c th\u1eddi \u0111i\u1ec3m tr\u1ed3ng trong v\u1ee5 xu\u00e2n 2017 \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 n\u0103ng su\u1ea5t c\u00e2y Gi\u1ea3o c\u1ed5 lam t\u1ea1i huy\u1ec7n V\u0103n Ch\u1ea5n, t\u1ec9nh Y\u00ean B\u00e1i<\/p>\n<\/td>\n

\n

Tr\u1ea7n Trung Ki\u00ean
\nTr\u1ea7n \u0110\u00ecnh H\u00e0
\nPhan Th\u1ecb Thu H\u1eb1ng
\nD\u01b0\u01a1ng Trung D\u0169ng<\/p>\n<\/td>\n

\n

Effect of planting time in spring season, 2017 on the growth and yield of Giao co lam (Gynostemma<\/i> sp.) in Van Chan district, Yen Bai province<\/p>\n<\/td>\n

\n

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

3<\/td>\n\n

Nghi\u00ean c\u1ee9u \u0111a d\u1ea1ng th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng, x\u00e3 h\u1ee3p th\u1ef1c v\u1eadt v\u00e0 c\u00e1c khu r\u1eebng c\u00f3 gi\u00e1 tr\u1ecb b\u1ea3o t\u1ed3n cao (HCVFS) \u1edf t\u1ec9nh \u0110\u1eafk L\u1eafk<\/p>\n<\/td>\n

\n

B\u1ea3o Huy<\/p>\n<\/td>\n

\n

Diversity of forest vegetation types, plant components and high conservation value forests (HCVFS) in Dak Lak province<\/p>\n<\/td>\n

\n

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

4<\/td>\n\n

M\u1ee9c \u0111\u1ed9 an to\u00e0n trong xung \u0111\u1ed9t voi – ng\u01b0\u1eddi v\u00e0 can thi\u1ec7p gi\u1ea3m nh\u1eb9 xung \u0111\u1ed9t \u1edf \u0110\u1eafk L\u1eafk v\u00e0
\n\u0110\u1ed3ng Nai<\/p>\n<\/td>\n

\n

Cao Th\u1ecb L\u00fd<\/p>\n<\/td>\n

\n

Safety levels in human elephant conflict and mitigative interventions for conflict in Dak Lak and Dong Nai provinces<\/p>\n<\/td>\n

\n

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

5<\/td>\n\n

\u0110\u1eb7c \u0111i\u1ec3m bi\u1ebfn d\u1ecb v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y Keo tai t\u01b0\u1ee3ng (Acacia mangium<\/i> Wild) t\u1ea1i kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 2<\/p>\n<\/td>\n

\n

Tr\u1ea7n H\u1eefu Bi\u1ec3n
\nNguy\u1ec5n H\u1eefu S\u1ef9
\nL\u00ea H\u1ed3ng H\u1eadu
\nNguy\u1ec5n H\u1ea1nh T\u00e2m
\nL\u00ea H\u1ed3ng Vi\u1ec7t<\/p>\n<\/td>\n

\n

The growth and stem form variation of Acacia mangium<\/i> Wild in 2nd generation progeny trial<\/p>\n<\/td>\n

\n

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

6<\/td>\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p v\u00e0 lo\u1ea1i c\u00e0nh gh\u00e9p t\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y gh\u00e9p S\u01a1n tra (Docynia indica<\/i> Wall.) giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m<\/p>\n<\/td>\n

\n

V\u0169 \u0110\u1ee9c To\u00e0n
\n\u0110\u1ed7 Anh Tu\u00e2n<\/p>\n<\/td>\n

\n

Effects of types of grafting scion and grafting methods on the survival and growth of grafting unions of Docynia indica<\/i> (Wall.) in nursery stage<\/p>\n<\/td>\n

\n

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

7<\/td>\n\n

Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh
\nth\u1eddi \u0111i\u1ec3m thu h\u00e1i qu\u1ea3, ki\u1ec3m nghi\u1ec7m ch\u1ea5t l\u01b0\u1ee3ng h\u1ea1t gi\u1ed1ng, b\u1ea3o qu\u1ea3n h\u1ea1t v\u00e0 k\u1ef9 thu\u1eadt t\u1ea1o c\u00e2y con D\u1ebb xanh (Lithocarpus pseudosundaicus<\/i> (Hickel et A.Camus) Camus)<\/p>\n<\/td>\n

\n

B\u00f9i Tr\u1ecdng Th\u1ee7y<\/p>\n<\/td>\n

\n

Research on determination of seed collection time, seed quality test, seed preservation and techniques to produce seedlings of De xanh\u00a0(Lithocarpus pseudosundaicus<\/i> (Hickel et A.Camus) Camus)<\/p>\n<\/td>\n

\n

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

8<\/td>\n\n

M\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc lo\u00e0i V\u00e0ng t\u00e2m (Manglietia fordiana<\/i>) t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Xu\u00e2n S\u01a1n t\u1ec9nh Ph\u00fa Th\u1ecd<\/p>\n<\/td>\n

\n

H\u1ed3 Ng\u1ecdc S\u01a1n
\nHo\u00e0ng Anh Ngh\u0129a
\nNguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n<\/p>\n<\/td>\n

\n

Some biological characteristics of Manglietia fordiana<\/i> in Xuan Son National Park, Phu Tho province<\/p>\n<\/td>\n

\n

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

9<\/td>\n\n

K\u1ebft qu\u1ea3 b\u01b0\u1edbc \u0111\u1ea7u nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc c\u1ee7a m\u1ed9t s\u1ed1 d\u00f2ng M\u1eafc ca (Macadamia integrifolia<\/i> Maiden & Betche) t\u1ea1i huy\u1ec7n Tam \u0110\u01b0\u1eddng, t\u1ec9nh Lai Ch\u00e2u<\/p>\n<\/td>\n

\n

\u0110\u00e0o Thanh V\u00e2n
\nNguy\u1ec5n V\u0103n Bi\u1ec3n<\/p>\n<\/td>\n

\n

Initial results in reseach of biological characters of some macadamin (Macadamia integrifolia<\/i>) cultivars in Tam Duong district, Lai Chau province<\/p>\n<\/td>\n

\n

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

10<\/td>\n\n

Bi\u1ebfn \u0111\u1ed9ng c\u1ea5u tr\u00fac v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng t\u1ea7ng c\u00e2y cao r\u1eebng t\u1ef1 nhi\u00ean t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Kon Ka Kinh, Gia Lai<\/p>\n<\/td>\n

\n

B\u00f9i M\u1ea1nh H\u01b0ng
\nL\u00ea Xu\u00e2n Tr\u01b0\u1eddng<\/p>\n<\/td>\n

\n

Changes in structure and quality of natural forest overstorey in National Park Kon Ka Kinh, Gia Lai<\/p>\n<\/td>\n

\n

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

11<\/td>\n\n

Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 m\u1ed1i quan h\u1ec7 c\u1ee7a lo\u00e0i c\u00e2y S\u1ebfn trung (Homalium ceylanicum<\/i> (Gardner) Benth) v\u1edbi c\u00e1c lo\u00e0i kh\u00e1c trong r\u1eebng t\u1ef1 nhi\u00ean \u1edf huy\u1ec7n Nam \u0110\u00f4ng v\u00e0 Ph\u00fa L\u1ed9c, t\u1ec9nh Th\u1eeba Thi\u00ean Hu\u1ebf<\/p>\n<\/td>\n

\n

V\u0169 \u0110\u1ee9c B\u00ecnh
\nNguy\u1ec5n V\u0103n L\u1ee3i
\nL\u00ea Xu\u00e2n Tr\u01b0\u1eddng<\/p>\n<\/td>\n

\n

Research on structural characteristics and relationship between Hainan homalium (Homalium ceylanicum<\/i> (Gardner) Benth) and other species in natural forests of Nam Dong and Phu Loc districts, Thua Thien Hue province<\/p>\n<\/td>\n

\n

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

12<\/td>\n\n

Spatial distribution of overstorey trees analyzed by replicated point patter method in R<\/p>\n<\/td>\n

\n

B\u00f9i M\u1ea1nh H\u01b0ng
\nV\u00f5 \u0110\u1ea1i H\u1ea3i<\/p>\n<\/td>\n

\n

Ph\u00e2n b\u1ed1 kh\u00f4ng gian c\u1ee7a c\u00e2y t\u1ea7ng cao ph\u00e2n t\u00edch b\u1edfi ph\u01b0\u01a1ng ph\u00e1p l\u1eb7p \u0111i\u1ec3m trong R<\/p>\n<\/td>\n

\n

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

13<\/td>\n\n

Nghi\u00ean c\u1ee9u \u0111\u1ecbnh l\u01b0\u1ee3ng cacbon c\u1ee7a r\u1eebng tr\u1ed3ng thu\u1ea7n lo\u00e0i B\u1ea7n chua (Sonneratia caseolaris<\/i>) \u1edf ven bi\u1ec3n huy\u1ec7n H\u1eadu L\u1ed9c, t\u1ec9nh Thanh H\u00f3a<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Th\u1ecb H\u1ed3ng H\u1ea1nh,
\nTr\u1ea7n Ho\u00e0ng \u00c1nh Ng\u1ecdc<\/p>\n<\/td>\n

\n

Study on carbon quatification of the plantation Sonneratia caseolaris<\/i> in the coastal area of Hau Loc district, Thanh Hoa province<\/p>\n<\/td>\n

\n

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

14<\/td>\n\n

S\u1eed d\u1ee5ng \u1ea3nh landsat x\u00e1c \u0111\u1ecbnh ch\u1ec9 s\u1ed1 kh\u00f4 h\u1ea1n nhi\u1ec7t \u0111\u1ed9 th\u1ef1c v\u1eadt v\u00e0 m\u1ed1i t\u01b0\u01a1ng quan v\u1edbi NDVI t\u1ea1i VQG C\u00e1t B\u00e0, Tp. H\u1ea3i Ph\u00f2ng giai \u0111o\u1ea1n 2006 – 2013<\/p>\n<\/td>\n

\n

Nguy\u1ec5n H\u1ea3i H\u00f2a<\/p>\n<\/td>\n

\n

Using landsat to determine Temperature Dryness Vegetation Index (TVDI) and relationships with NDVI in Cat Ba National Park, Hai Phong city during 2006 – 2013<\/p>\n<\/td>\n

\n

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

15<\/td>\n\n

S\u1eed d\u1ee5ng \u1ea3nh landsat x\u00e1c \u0111\u1ecbnh ch\u1ec9 s\u1ed1 di\u1ec7n t\u00edch l\u00e1 (LAI) v\u00e0 m\u1ed1i t\u01b0\u01a1ng quan v\u1edbi l\u01b0\u1ee3ng m\u01b0a t\u1ea1i VQG C\u00e1t B\u00e0, th\u00e0nh ph\u1ed1
\nH\u1ea3i Ph\u00f2ng giai \u0111o\u1ea1n 1996 – 2016<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n
\nNguy\u1ec5n H\u1ea3i H\u00f2a<\/p>\n<\/td>\n

\n

Using landsat to determine leaf area index (LAI) and relationships with rainfall in Cat Ba National Park, Hai Phong city during 1996 – 2016<\/p>\n<\/td>\n

\n

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

16<\/td>\n\n

V\u1eadn d\u1ee5ng ma tr\u1eadn SWOT v\u00e0 QSPM \u0111\u1ec3 x\u00e2y d\u1ef1ng v\u00e0 l\u1ef1a ch\u1ecdn chi\u1ebfn l\u01b0\u1ee3c ph\u00e1t tri\u1ec3n c\u00f4ng ty TNHH TMV L\u00e2m nghi\u1ec7p V\u01b0\u1eddn qu\u1ed1c gia U Minh H\u1ea1 t\u1ec9nh C\u00e0 Mau \u0111\u1ebfn 2025<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Ph\u01b0\u1edbc Ho\u00e0ng<\/p>\n<\/td>\n

\n

Application matrix SWOT and QSPM for construction and choices strategic development One member limited liability Company forest Natoinal Park U Minh Ha Ca Mau province to 2025<\/p>\n<\/td>\n

\n

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

17<\/td>\n\n

Hi\u1ec7n tr\u1ea1ng r\u1eebng ng\u1eadp m\u1eb7n t\u1ea1i Qu\u1ea3ng Ninh<\/p>\n<\/td>\n

\n

H\u00e0 Th\u1ecb M\u1eebng
\n\u0110\u1ed7 Th\u1ecb Kim Nhung<\/p>\n<\/td>\n

\n

Current status of mangrove forests in Quang Ninh<\/p>\n<\/td>\n

\n

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

18<\/td>\n\n

\u0110\u1ed9 b\u1ec1n kh\u00e1ng n\u1ea5m m\u1ee5c tr\u1eafng c\u1ee7a g\u1ed7 Gi\u1ed5i ford – S\u1ef1 ph\u00e1 hu\u1ef7 c\u1ea5u tr\u00fac g\u1ed7 b\u1edfi c\u00e1c lo\u1ea1i n\u1ea5m m\u1ee5c tr\u1eafng<\/p>\n<\/td>\n

\n

Ho\u00e0ng Trung Hi\u1ebfu
\nNguy\u1ec5n \u0110\u1ee9c Th\u00e0nh
\nNguy\u1ec5n T\u1eed Kim
\nNguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc<\/p>\n<\/td>\n

\n

Natural resistance of Manglietia fordiana<\/i> Oliv. to white-rot fungi- the wood structure deterioration by different white-rot fungus<\/p>\n<\/td>\n

\n

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

\u0110A D\u1ea0NG LO\u00c0I C\u00c2Y D\u01af\u1ee2C LI\u1ec6U <\/strong>T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN N\u00c0 H\u1ea8U T\u1ec8NH Y\u00caN B\u00c1I<\/strong><\/p>\n

H\u1ed3 Ng\u1ecdc S\u01a1n1<\/sup>*<\/sup>, Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n1<\/sup>,Nguy\u1ec5n V\u0103n Huy2
\n<\/sup>1<\/sup><\/i>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng <\/i>L<\/i>\u00e2m Th\u00e1i Nguy\u00ean<\/i>
\n2<\/sup>Tr\u01b0\u1eddng Trung c\u1ea5p ngh\u1ec1 D\u00e2n t\u1ed9c n\u1ed9i tr\u00fa Ph\u00fa Th\u1ecd<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u t\u1ea1i Khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean N\u00e0 H\u1ea9u t\u1ec9nh Y\u00ean B\u00e1i cho th\u1ea5y c\u00f3 110 lo\u00e0i c\u00e2y thu\u1ed1c thu\u1ed9c 4 ng\u00e0nh th\u1ef1c v\u1eadt v\u00e0 62 h\u1ecd th\u1ef1c v\u1eadt b\u1eadc cao c\u00f3 m\u1ea1ch, trong \u0111\u00f3: 38,18% lo\u00e0i c\u00e2y thu\u1ed1c th\u00e2n c\u1ecf; 26,36% d\u1ea1ng d\u00e2y leo; 22,73% d\u1ea1ng c\u00e2y b\u1ee5i; 10,91% c\u00e2y g\u1ed7 v\u00e0 1,82% th\u00e2n d\u1ea1ng c\u00e2y g\u1ed7. B\u00ean c\u1ea1nh \u0111\u00f3 c\u00f2n x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c 25 lo\u00e0i c\u00f3 t\u00ean trong S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam (2007): c\u1ea5p CR (C\u1ef1c k\u1ef3 nguy c\u1ea5p) 1 lo\u00e0i, c\u1ea5p EN (Nguy c\u1ea5p) 13 lo\u00e0i, c\u1ea5p VU (S\u1eafp nguy c\u1ea5p) 11 lo\u00e0i; S\u1ed1 lo\u00e0i c\u00f3 t\u00ean trong Ngh\u1ecb \u0111\u1ecbnh s\u1ed1 32\/2006\/N\u0110-CP l\u00e0 7 lo\u00e0i: c\u00f3 1 lo\u00e0i thu\u1ed9c nh\u00f3m IA – nh\u00f3m c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt nghi\u00eam c\u1ea5m khai th\u00e1c, s\u1eed d\u1ee5ng v\u00ec m\u1ee5c \u0111\u00edch th\u01b0\u01a1ng m\u1ea1i, v\u00e0 c\u00f3 6 lo\u00e0i thu\u1ed9c nh\u00f3m IIA- nh\u00f3m c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt h\u1ea1n ch\u1ebf khai th\u00e1c, s\u1eed d\u1ee5ng v\u00ec m\u1ee5c \u0111\u00edch th\u01b0\u01a1ng m\u1ea1i; S\u1ed1 lo\u00e0i trong danh l\u1ee5c \u0111\u1ecf IUCN (2013) l\u00e0: 2 lo\u00e0i thu\u1ed9c c\u1ea5p Lc (\u00edt quan t\u00e2m), 1 lo\u00e0i thu\u1ed9c c\u1ea5p DD (thi\u1ebfu d\u1eabn li\u1ec7u).<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>D\u01b0\u1ee3c li\u1ec7u, nguy c\u1ea5p, b\u1ecb \u0111e d\u1ecda, b\u1ea3o t\u1ed3n, Khu BTTN N\u00e0 H\u1ea9u<\/td>\n<\/tr>\n

Biodiversity survey of medicinal plants in Na Hau nature reserve, Yen Bai province<\/strong><\/p>\n

After intensive investigation into medicinal plants in nature reserve Na Hau, 110 species of medicinal plants are recognized and identified characteristics of identification, belong to 4 phyla and 62 vascular plants: 38.18% grass medicinal plants; 26.36% vines form; Shrubby 22.73%; 10.91% stem wood and 1.82% wood tree. The section also identified 25 species listed in the Vietnam Red Book (2007): CR (Critically Endangered) 1 species, EN (Endangered) 13 species, VU (Vulnerable), 11 species; Number of species listed in Decree No. 32\/2006\/ND-CP of 7 species: 1 species of group IA – groups of plant species banned from exploitation or use for commercial purposes, and there are 6 species of group IIA – groups of plant species limited exploitation or use for commercial purposes; Some species in the IUCN Red List (2013) are: 2 species on the level Lc (Least Concern), 1 species level DD (Data Deficient).<\/p>\n

Keywords: <\/i><\/b>Medicinal plant, critical endangered, endangered, conservation, Na Hau Nature Reserves<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ea2NH H\u01af\u1edeNG C\u1ee6A C\u00c1C TH\u1edcI \u0110I\u1ec2M TR\u1ed2NG TRONG V\u1ee4 XU\u00c2N 2017 \u0110\u1ebeN SINH TR\u01af\u1edeNG V\u00c0 N\u0102NG SU\u1ea4T C\u00c2Y GI\u1ea2O C\u1ed4 LAM <\/strong>T\u1ea0I HUY\u1ec6N V\u0102N CH\u1ea4N, T\u1ec8NH Y\u00caN B\u00c1I<\/strong><\/p>\n

Tr\u1ea7n Trung Ki\u00ean, Tr\u1ea7n \u0110\u00ecnh H\u00e0, Phan Th\u1ecb Thu H\u1eb1ng, D\u01b0\u01a1ng Trung D\u0169ng
\nTr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Th\u00e1i Nguy\u00ean<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u0110\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u 3 th\u1eddi \u0111i\u1ec3m tr\u1ed3ng kh\u00e1c nhau trong v\u1ee5 Xu\u00e2n n\u0103m 2017 (ng\u00e0y 01\/01, 01\/02 v\u00e0 01\/3) cho hai lo\u00e0i Gi\u1ea3o c\u1ed5 lam (GCL): 5 l\u00e1 ch\u00e9t v\u00e0 7 l\u00e1 ch\u00e9t tr\u1ed3ng b\u1eb1ng hom c\u00e0nh t\u1ea1i huy\u1ec7n V\u0103n Ch\u1ea5n, t\u1ec9nh Y\u00ean B\u00e1i. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo ki\u1ec3u kh\u1ed1i ng\u1eabu nhi\u00ean ho\u00e0n ch\u1ec9nh (RCBD) v\u1edbi 3 l\u1ea7n nh\u1eafc l\u1ea1i. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: Tr\u1ed3ng t\u1ea1i th\u1eddi \u0111i\u1ec3m ng\u00e0y 01\/01, hai lo\u00e0i GCL \u0111\u1ec1u cho kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng t\u1ed1t v\u00e0 n\u0103ng su\u1ea5t sinh kh\u1ed1i cao h\u01a1n tr\u1ed3ng v\u00e0o hai th\u1eddi \u0111i\u1ec3m sau \u0111\u00f3. Tr\u1ed3ng t\u1ea1i th\u1eddi \u0111i\u1ec3m ng\u00e0y 01\/01, sau 105 ng\u00e0y, lo\u00e0i GCL 5 v\u00e0 7 l\u00e1 ch\u00e9t c\u00f3 chi\u1ec1u d\u00e0i t\u01b0\u01a1ng \u1ee9ng: 111,23 v\u00e0 114,19cm, s\u1ed1 c\u00e0nh\/c\u00e2y: 9,97 v\u00e0 13,67 c\u00e0nh, cao h\u01a1n 2 th\u1eddi \u0111i\u1ec3m tr\u1ed3ng ng\u00e0y 01\/02 v\u00e0 01\/3. S\u1ed1 l\u00e1\/c\u00e2y \u0111\u1ea1t t\u01b0\u01a1ng \u1ee9ng 39,43 v\u00e0 41,73 l\u00e1\/c\u00e2y, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ho\u1eb7c cao h\u01a1n tr\u1ed3ng ng\u00e0y 01\/02 v\u00e0 01\/3. N\u0103ng su\u00e2\u0301t sinh kh\u1ed1i t\u01b0\u01a1i tr\u00ean m\u1eb7t \u0111\u1ea5t khai th\u00e1c l\u1ea7n 1 sau 105 ng\u00e0y c\u1ee7a lo\u00e0i 5 l\u00e1 ch\u00e9t \u1edf c\u00e1c th\u1eddi \u0111i\u1ec3m tr\u1ed3ng kh\u00e1c nhau t\u1eeb 1,00 – 1,51 t\u1ea5n\/ha, c\u1ee7a lo\u00e0i 7 l\u00e1 ch\u00e9t dao \u0111\u1ed9ng t\u1eeb 1,10 – 1,63 t\u1ea5n\/ha, trong khi n\u0103ng su\u1ea5t sinh kh\u1ed1i kh\u00f4 t\u01b0\u01a1ng \u1ee9ng t\u1eeb 0,19 – 0,30 t\u1ea5n\/ha v\u00e0 0,22 – 0,35 t\u1ea5n\/ha. C\u1ea3 2 lo\u00e0i tr\u1ed3ng v\u00e0o th\u00e1ng 1 cho n\u0103ng su\u1ea5t t\u01b0\u01a1i v\u00e0 kh\u00f4 cao h\u01a1n tr\u1ed3ng v\u00e0o th\u00e1ng 2 v\u00e0 th\u00e1ng 3. Loa\u0300i GCL 7 la\u0301 ch\u00e9t th\u1ec3 hi\u1ec7n sinh tr\u01b0\u1edfng m\u1ea1nh, cho sinh kh\u1ed1i l\u1edbn v\u00e0 n\u0103ng su\u00e2\u0301t cao h\u01a1n loa\u0300i GCL 5 l\u00e1 ch\u00e9t \u1edf c\u00e1c th\u1eddi \u0111i\u1ec3m tr\u1ed3ng kh\u00e1c nhau.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> Gi\u1ea3o c\u1ed5 lam 5 l\u00e1 ch\u00e9t, Gi\u1ea3o c\u1ed5 lam 7 l\u00e1 ch\u00e9t, n\u0103ng su\u1ea5t, sinh tr\u01b0\u1edfng, th\u1eddi \u0111i\u1ec3m tr\u1ed3ng, v\u1ee5 xu\u00e2n, Y\u00ean B\u00e1i<\/p>\n

 <\/td>\n<\/tr>\n

Effect of planting time in spring season, 2017 on the growth and yield of Giao co lam (Gynostemma <\/i>sp.) in Van Chan district, Yen Bai province<\/strong><\/p>\n

The research on three different planting times in Spring season, 2017 (the 1th<\/sup>-Jan., the 1th<\/sup>-Feb. and the 1th<\/sup>-Mar.) was conducted in two Giao co lam (GCL) species: five-leaflets (Gynostemma pentaphyllum <\/i>(Thunb.) Makino) and seven-leaflets (Gynostemma pubescens <\/i>(Gagnep) C.Y.Wu) planted by cuttings in Van Chan district, Yen Bai province. The experiment was arranged in a randomised complete block design with three replications. Results showed that planting on the 1th<\/sup>-Jan. gave better growth and up-land vegetative yield than planting on other times in both two GCL species. Planting on the1th<\/sup>-Jan., after 105 days, five-leaflet GCL and seven-leaflet GCL reached 111.23cm and 114.19cm in the vine length; 9.97 and 13.67 branches\/plant, respectively, significantly higher than planting on other planting times. The number of leaves\/plant planted on the1th<\/sup>-Jan. achieved respective values with 39.43 and 41.73 leaves, which was equal or higher than being planted on other times. The weight of up-land fresh vegetative plant at the first harvest (at 105 days affer planting) of the five-leaflet GCL and the seven-leaflet GCL gained 1.00 – 1.51 tons\/ha and 1.10 – 1.63 tons\/ha, repectively, while the weight of up-land dried vegetative plant obtained from 0.19 – 0.30 tons\/ha and 0.22 – 0.35 tons\/ha, respectively. Both two GCL species produced higher yield of vegetative plant when planting on 1th<\/sup>-Jan, compared to planting other times. Seven-leaflet GCL exhibited larger plant size and produced higher yield of vegetative plant than five-leaflet GCL in all three planting times.<\/p>\n

Keywords<\/i><\/b>:<\/i> Five-leaflet Giao co lam, seven-leaflet Giao co lam, yield, growth, planting time, Spring season, Yen Bai.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u0110A D\u1ea0NG TH\u1ea2M TH\u1ef0C V\u1eacT R\u1eeaNG, <\/strong>X\u00c3 H\u1ee2P TH\u1ef0C V\u1eacT V\u00c0 C\u00c1C KHU R\u1eeaNG <\/strong>C\u00d3 GI\u00c1 TR\u1eca B\u1ea2O T\u1ed2N CAO (HCVFs) \u1ede T\u1ec8NH \u0110\u1eaeK L\u1eaeK<\/strong><\/p>\n

B\u1ea3o Huy
\nTr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u n\u00e0y nh\u1eb1m ch\u1ec9 ra s\u1ef1 \u0111a d\u1ea1ng v\u1ec1 ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng, x\u00e3 h\u1ee3p th\u1ef1c v\u1eadt v\u00e0 c\u00e1c khu r\u1eebng c\u00f3 gi\u00e1 tr\u1ecb b\u1ea3o t\u1ed3n cao (High Conservation Value Forests HCVFs) \u1edf t\u1ec9nh \u0110\u1eafk L\u1eafk \u0111\u1ec3 h\u1ed7 tr\u1ee3 cho c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n \u0111a d\u1ea1ng sinh h\u1ecdc. \u0110\u00e3 ti\u1ebfn h\u00e0nh kh\u1ea3o s\u00e1t \u1edf n\u0103m khu r\u1eebng \u0111\u1eb7c d\u1ee5ng, bao g\u1ed3m V\u01b0\u1eddn qu\u1ed1c gia (VQG) Yok \u0110\u00f4n, VQG Ch\u01b0 Yang Sin, khu ba\u0309o t\u00f4\u0300n thi\u00ean nhi\u00ean Ea S\u00f4, khu d\u1ef1 tr\u1eef thi\u00ean nhi\u00ean Nam Ka v\u00e0 khu r\u01b0\u0300ng b\u1ea3o v\u1ec7 c\u1ea3nh quan h\u00f4\u0300 L\u1eafk trong giai \u0111o\u1ea1n 2014 – 2016. Ph\u00e2n lo\u1ea1i ki\u00ea\u0309u tha\u0309m th\u01b0\u0323c v\u00e2\u0323t (Tha\u0301i V\u0103n Tr\u01b0\u0300ng, 1978); ph\u00e2n chia xa\u0303 h\u01a1\u0323p th\u01b0\u0323c v\u00e2\u0323t theo \u0111\u01a1n vi\u0323 sinh tha\u0301i nh\u01b0 ph\u01b0\u0301c h\u01a1\u0323p, \u01b0u h\u01a1\u0323p, qu\u00e2\u0300n h\u01a1\u0323p (Walter, 1962 d\u1eabn theo Th\u00e1i V\u0103n Tr\u1eebng, 1978); s\u1eed d\u1ee5ng b\u1ed9 c\u00f4ng c\u1ee5 x\u00e1c \u0111\u1ecbnh r\u1eebng c\u00f3 gi\u00e1 tr\u1ecb b\u1ea3o t\u1ed3n cao (WWF, 2008). K\u1ebft qu\u1ea3 cho th\u1ea5y \u1edf t\u1ec9nh \u0110\u1eafk L\u1eafk c\u00f3 11 ki\u00ea\u0309u tha\u0309m trong 16 ki\u00ea\u0309u tha\u0309m th\u01b0\u0323c r\u01b0\u0300ng cu\u0309a ca\u0309 n\u01b0\u01a1\u0301c; c\u00f3 10 loa\u0323i xa\u0303 h\u01a1\u0323p th\u01b0\u0323c v\u00e2\u0323t g\u1ed3m 1 ph\u1ee9c h\u1ee3p, 5 qu\u1ea7n h\u1ee3p v\u00e0 4 \u01b0u h\u1ee3p th\u1ef1c v\u1eadt, c\u00e1c \u01b0u h\u1ee3p v\u00e0 qu\u1ea7n h\u1ee3p bao g\u1ed3m c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 qu\u00fd hi\u1ebfm; c\u00f3 \u0111\u1ebfn 5\/6 loa\u0323i HCVFs theo ph\u00e2n lo\u1ea1i c\u1ee7a FSC (2011).<\/p>\n

T<\/strong><\/em>\u1eeb kh\u00f3a:<\/i><\/b> <\/i>\u0110a d\u1ea1ng sinh h\u1ecdc, ki\u1ec3u r\u1eebng, c\u1ea5u tr\u00fac lo\u00e0i, HCVF<\/p>\n

 <\/td>\n<\/tr>\n

Diversity of forest vegetation types, plant components and high conservation value forests (HCVFS) in Dak Lak province<\/strong><\/p>\n

This study aims to show the diversity of forest vegetation types, plant components and high conservation value forests (HCVFs) in Dak Lak province to support biodiversity conservation activities. The survey was conducted in five special-use forests, including Yok Don National Park, Chu Yang Sin National Park, Ea So Nature Reserve, Nam Ka Nature Reserve, and protected landscape Lake Lak in the period 2014 – 2016. Classification of forest vegetation type (Thai Van Trung, 1978); division of plant components into diferent plant communities (Walter, 1962 refer to Thai Van Trung, 1978); used the toolkit identifying high conservation value forests (WWF, 2008). The results showed that in Dak Lak province there are 11 types of forest vegetation in 16 types of the country; there are 10 types of plant communities consisting of rare species; there are up to 5\/6 types of HCVFs classified by FSC (2011).<\/p>\n

Keywords:<\/i><\/b> <\/i>Biodiversity, forest vegetation type, HCVF, plant component,<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u1ee8C \u0110\u1ed8 AN TO\u00c0N TRONG XUNG \u0110\u1ed8T VOI – NG\u01af\u1edcI V\u00c0 CAN THI\u1ec6P GI\u1ea2M NH\u1eb8 XUNG \u0110\u1ed8T \u1ede \u0110\u1eaeK L\u1eaeK V\u00c0 \u0110\u1ed2NG NAI<\/strong><\/p>\n

Cao Th\u1ecb L\u00fd
\nKhoa N\u00f4ng L\u00e2m nghi\u1ec7p, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean <\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

V\u1edbi b\u1ed1i c\u1ea3nh th\u1ef1c t\u1ebf \u1edf hai t\u1ec9nh c\u00f3 xung \u0111\u1ed9t Voi – Ng\u01b0\u1eddi (Human Elephant Conflict – HEC) l\u00e0 \u0110\u1eafk L\u1eafk v\u00e0 \u0110\u1ed3ng Nai, nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn h\u1ec7 th\u1ed1ng an to\u00e0n trong HEC (ph\u1ecfng theo Ashley Brooks, 2015) \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 \u0111\u00e1nh gi\u00e1. K\u1ebft qu\u1ea3 \u0111\u00e3 ch\u1ec9 ra m\u1ee9c \u0111\u1ed9 an to\u00e0n c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n trong h\u1ec7 th\u1ed1ng HEC g\u1ed3m ng\u01b0\u1eddi, t\u00e0i s\u1ea3n, voi v\u00e0 sinh c\u1ea3nh c\u1ee7a voi; \u0111\u1ed3ng th\u1eddi gi\u00fap ph\u00e1t hi\u1ec7n nh\u1eefng thi\u1ebfu h\u1ee5t v\u1ec1 c\u00e1c y\u1ebfu t\u1ed1 li\u00ean quan \u0111\u1ebfn qu\u1ea3n l\u00fd HEC g\u1ed3m ch\u00ednh s\u00e1ch, hi\u1ec3u bi\u1ebft v\u1ec1 xung \u0111\u1ed9t, ph\u00f2ng ng\u1eeba, \u1ee9ng ph\u00f3, gi\u1ea3m nh\u1eb9 v\u00e0 gi\u00e1m s\u00e1t. \u0110\u00e2y l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 m\u1ed7i \u0111\u1ecba ph\u01b0\u01a1ng c\u1ea7n ch\u00fa tr\u1ecdng khi x\u00e1c \u0111\u1ecbnh c\u00e1c gi\u1ea3i ph\u00e1p c\u1ee5 th\u1ec3 trong chi\u1ebfn l\u01b0\u1ee3c qu\u1ea3n l\u00fd HEC an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n

T\u1eeb kh\u00f3a<\/b>: \u0110\u1eafk L\u1eafk, \u0110\u1ed3ng Nai, can thi\u1ec7p, gi\u1ea3m nh\u1eb9, Xung \u0111\u1ed9t Voi – Ng\u01b0\u1eddi<\/p>\n

 <\/td>\n<\/tr>\n

Safety levels in human elephant conflict and mitigative interventions for conflict in Dak Lak and Dong Nai provinces<\/strong><\/p>\n

This research used the SAFE approach to Human Elephant Conflict – HEC (adapted from Ashley Brooks, 2015) for analysis and rapid assessment, based on the actual situation in the two HEC provinces, namely Dak Lak and Dong Nai. The results not only showed safe rates of parts of HEC system consist of person, asset, elephant and habitat, but also indicated gaps of activities related to the elements of the currently HEC management, such as policy, prevention, mitigation, understanding the conflict, response and monitoring. These are bases to focus on identifying specific solutions in a more efficient and effective HEC management strategy for each locality.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1eb6C \u0110I\u1ec2M BI\u1ebeN D\u1eca V\u1ec0 SINH TR\u01af\u1edeNG V\u00c0 CH\u1ea4T L\u01af\u1ee2NG<\/strong>
\n TH\u00c2N C\u00c2Y KEO TAI T\u01af\u1ee2NG (Acacia mangium<\/i> Wild)<\/strong>
\n T\u1ea0I KH\u1ea2O NGHI\u1ec6M H\u1eacU TH\u1ebe TH\u1ebe H\u1ec6 2<\/strong><\/p>\n

Tr\u1ea7n H\u1eefu Bi\u1ec3n1<\/sup>, Nguy\u1ec5n H\u1eefu S\u1ef92<\/sup>, L\u00ea H\u1ed3ng H\u1eadu3<\/sup>,
\nNguy\u1ec5n H\u1ea1nh T\u00e2m3<\/sup>, L\u00ea H\u1ed3ng Vi\u1ec7t3<\/sup>
\n<\/sup>1<\/sup><\/i>Trung t\u00e2m Nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p \u0110\u00f4ng Nam B\u1ed9
\n2<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p
\n3<\/sup>Ph\u00e2n hi\u1ec7u Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Keo tai t\u01b0\u1ee3ng l\u00e0 c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 l\u1ef1c t\u1ea1i Vi\u1ec7t Nam, nghi\u00ean c\u1ee9u c\u1ea3i thi\u1ec7n gi\u1ed1ng lo\u00e0i n\u00e0y nh\u1eb1m cung c\u1ea5p ngu\u1ed3n gi\u1ed1ng n\u0103ng su\u1ea5t cao, ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t g\u00f3p ph\u1ea7n t\u00e1i c\u01a1 c\u1ea5u ng\u00e0nh l\u00e2m nghi\u1ec7p. M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m \u0111\u00e1nh gi\u00e1 bi\u1ebfn d\u1ecb di truy\u1ec1n v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y c\u1ee7a 100 gia \u0111\u00ecnh Keo tai t\u01b0\u1ee3ng 20 th\u00e1ng tu\u1ed5i c\u1ee7a kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 hai tr\u1ed3ng t\u1ea1i Tr\u1ea1m Nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p S\u00f4ng M\u00e2y – \u0110\u1ed3ng Nai, t\u1eeb \u0111\u00f3 s\u1ebd \u0111\u01b0a ra c\u00e1c gi\u1ea3i ph\u00e1p nh\u1eb1m chuy\u1ec3n h\u00f3a kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u00e0nh v\u01b0\u1eddn gi\u1ed1ng th\u1ebf h\u1ec7 hai Keo tai t\u01b0\u1ee3ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m bi\u1ebfn d\u1ecb sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y c\u1ee7a c\u00e1c gia \u0111\u00ecnh trong kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf th\u1ebf h\u1ec7 2 \u0111\u00e3 cho th\u1ea5y \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, th\u1ec3 t\u00edch, ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y c\u00f3 sai kh\u00e1c r\u00f5 r\u1ec7t gi\u1eefa c\u00e1c gia \u0111\u00ecnh trong kh\u1ea3o nghi\u1ec7m, nh\u00f3m 10 gia \u0111\u00ecnh t\u1ed1t nh\u1ea5t (71, 40, 74, 45, 83, 59, 58, 51, 42, 46) c\u00f3 th\u1ec3 t\u00edch th\u00e2n c\u00e2y trung b\u00ecnh v\u01b0\u1ee3t 50% so v\u1edbi trung b\u00ecnh kh\u1ea3o nghi\u1ec7m v\u00e0 v\u01b0\u1ee3t 130% so v\u1edbi nh\u00f3m 10 gia \u0111\u00ecnh c\u00f3 sinh tr\u01b0\u1edfng k\u00e9m nh\u1ea5t. H\u1ec7 s\u1ed1 di truy\u1ec1n theo ngh\u0129a h\u1eb9p c\u1ee7a c\u00e1c ch\u1ec9 ti\u00eau \u0111\u01b0\u1eddng k\u00ednh, th\u1ec3 t\u00edch, \u0111\u1ed9 th\u1eb3ng th\u00e2n \u1edf m\u1ee9c trung b\u00ecnh (0,17 – 0,20) trong khi h\u1ec7 s\u1ed1 di truy\u1ec1n c\u1ee7a ch\u1ec9 ti\u00eau chi\u1ec1u cao v\u00e0 \u0111\u1ed9 nh\u1ecf c\u00e0nh l\u00e0 th\u1ea5p (0,05 – 0,10). Trong m\u1ed9t s\u1ed1 gia \u0111\u00ecnh sinh tr\u01b0\u1edfng \u1edf nh\u00f3m trung b\u00ecnh v\u1eabn t\u1ed3n t\u1ea1i c\u00e1 th\u1ec3 sinh tr\u01b0\u1edfng t\u1ed1t, do \u0111\u00f3 ch\u1ecdn l\u1ecdc c\u00e1 th\u1ec3 t\u1ed1t c\u00f3 \u00fd ngh\u0129a thi\u1ebft th\u1ef1c trong c\u00f4ng t\u00e1c c\u1ea3i thi\u1ec7n gi\u1ed1ng c\u00e2y r\u1eebng. \u1ede 20 th\u00e1ng tu\u1ed5i, kh\u1ea3o nghi\u1ec7m \u0111\u00e3 xu\u1ea5t hi\u1ec7n s\u1ef1 c\u1ea1nh tranh v\u1ec1 sinh tr\u01b0\u1edfng gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong gia \u0111\u00ecnh; do \u0111\u00f3, kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf c\u1ea7n \u0111\u01b0\u1ee3c t\u1ec9a th\u01b0a di truy\u1ec1n l\u1ea7n 1 (c\u1eaft 1 trong 3 c\u00e2y) d\u1ea7n chuy\u1ec3n ho\u00e1 sang v\u01b0\u1eddn gi\u1ed1ng th\u1ebf h\u1ec7 2 \u0111\u1ec3 cung c\u1ea5p h\u1ea1t gi\u1ed1ng trong t\u01b0\u01a1ng lai.<\/p>\n

T\u1eeb kho\u00e1<\/i><\/b>: Bi\u1ebfn d\u1ecb, h\u1ec7 s\u1ed1 di truy\u1ec1n, Keo tai t\u01b0\u1ee3ng.<\/p>\n

 <\/td>\n<\/tr>\n

The growth and stem form variation of Acacia mangium<\/i> Wild in 2nd<\/sup> generation progeny trial<\/strong><\/p>\n

Acacia mangium<\/i> is the main commerce plantation species in Vietnam, research on this species improvement should provide seed resource with high volumn tree, good stem form and suitable in forestry restructural. The research results of growth and stem form variance between families of 2nd<\/sup> generation progeny trial in Song May – Vinh Cuu – Dong Nai showed that the diameter, height, volumn, stem form of tree were significant difference; the best growth of 10 families (71, 40, 74, 45, 83, 59, 58, 51, 42, 46) were volumn average of stem exceed 50% the volumn average of stem in progeny trial and exceed 130% the worse growth of 10 families. In the some families that belong to moderate growth group still include good individuals with high volumn and good stem form; therefor, selecting good individuals is the real value in tree improvement. Narrow sense hertitability for diameter, stem straightness was moderate (0.17 – 0.20) while it was low for height and branch size. At 20 months old, the progeny trial requires the thinning (cut 1 in 3 tree\/family) to subsequently convert to the 2nd<\/sup> generation seedling seed orchard, that provide improved seed in the future.<\/p>\n

Keywords<\/i><\/b>: Acacia mangium<\/i>, genetic variation, heritability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ea2NH H\u01af\u1edeNG C\u1ee6A PH\u01af\u01a0NG PH\u00c1P GH\u00c9P <\/strong>V\u00c0 LO\u1ea0I C\u00c0NH GH\u00c9P T\u1edaI T\u1ef6 L\u1ec6 S\u1ed0NG V\u00c0 SINH TR\u01af\u1edeNG <\/strong>C\u1ee6A C\u00c2Y GH\u00c9P S\u01a0N TRA (Docynia indica<\/i> Wall.) <\/strong>GIAI \u0110O\u1ea0N V\u01af\u1edcN \u01af\u01a0M<\/strong><\/p>\n

V\u0169 \u0110\u1ee9c To\u00e0n1<\/sup>, \u0110\u1ed7 Anh Tu\u00e2n2
\n<\/sup>[1]<\/sup><\/b><\/sup><\/i> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y B\u1eafc
\n2<\/sup> Tr\u01b0\u1eddng C\u00e1n b\u1ed9 qu\u1ea3n l\u00fd N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n I<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p v\u00e0 lo\u1ea1i c\u00e0nh gh\u00e9p t\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y gh\u00e9p S\u01a1n tra giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed 6 c\u00f4ng th\u1ee9c theo ph\u01b0\u01a1ng ph\u00e1p kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7 2 nh\u00e2n t\u1ed1 (2 ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p l\u00e0 gh\u00e9p \u00e1p, gh\u00e9p n\u00eam, v\u00e0 3 lo\u1ea1i c\u00e0nh gh\u00e9p l\u00e0 c\u00e0nh b\u00e1nh t\u1ebb, c\u00e0nh mang ch\u1ed3i, c\u00e0nh h\u00f3a g\u1ed7 ho\u00e0n to\u00e0n). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, t\u00e1c \u0111\u1ed9ng t\u1ed5ng h\u1ee3p c\u1ee7a 2 nh\u00e2n t\u1ed1 ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p v\u00e0 lo\u1ea1i c\u00e0nh gh\u00e9p, c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng, nh\u01b0ng kh\u00f4ng \u1ea3nh h\u01b0\u1edfng r\u00f5 \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y gh\u00e9p. T\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y gh\u00e9p ch\u1ecbu \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t theo t\u1eebng nh\u00e2n t\u1ed1 trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m. T\u1ef7 l\u1ec7 s\u1ed1ng cao nh\u1ea5t \u1edf ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p \u00e1p c\u00e0nh h\u00f3a g\u1ed7 ho\u00e0n to\u00e0n \u0111\u1ea1t 72%. \u0110\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n ch\u1ed3i cao nh\u1ea5t \u1edf ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p n\u00eam v\u00e0 lo\u1ea1i c\u00e0nh gh\u00e9p mang ch\u1ed3i.<\/p>\n

T\u1eeb kh\u00f3a: <\/i><\/b>C\u00e0nh gh\u00e9p, ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p, S\u01a1n tra, v\u01b0\u1eddn \u01b0\u01a1m<\/p>\n

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Effects of types of grafting scion and grafting methods on the survival and growth of grafting unions of Docynia indica<\/i> (Wall.) in nursery stage<\/strong><\/p>\n

This article presents the results of studying the effects of types of grafting scion and grafting methods on the survival and growth of grafting unions of Docynia indica<\/i>. The experiment were arranged by 2 factor and ramdomized approach with 6 grafting formulas (2 methods of grafting (side veneer grafting, cleft grafting) and 3 types of grafting scion (semi-wooded scion, scion with bud, wooded scion)). The research results show that the combined effect of two grafting factors does significantly affect the survival. However, does not significantly affect the growth of the grafting unions. The individual grafting factor has signifcant effects on the survival and growth of the grafting unions. The highest survival rate is 72% by appying method of side veneer grafting with type of wooded scion. The average diameter and height of the buds of the grafting unions are achieved by applying method of cleft grafting and scion with bud.<\/p>\n

Keywords:<\/i><\/b> Grafting method, grafting scion, Docynia indica<\/i>, nursery<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U X\u00c1C \u0110\u1ecaNH TH\u1edcI \u0110I\u1ec2M THU H\u00c1I QU\u1ea2, <\/strong>KI\u1ec2M NGHI\u1ec6M CH\u1ea4T L\u01af\u1ee2NG H\u1ea0T GI\u1ed0NG, B\u1ea2O QU\u1ea2N H\u1ea0T <\/strong>V\u00c0 K\u1ef8 THU\u1eacT T\u1ea0O C\u00c2Y CON D\u1eba XANH <\/strong>(Lithocarpus pseudosundaicus<\/i> (Hickel et A.Camus) Camus)<\/strong><\/p>\n

B\u00f9i Tr\u1ecdng Th\u1ee7y
\nTrung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u00f4ng B\u1eafc b\u1ed9<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m thu h\u00e1i qu\u1ea3, ki\u1ec3m nghi\u1ec7m ch\u1ea5t l\u01b0\u1ee3ng h\u1ea1t gi\u1ed1ng v\u00e0 k\u1ef9 thu\u1eadt t\u1ea1o c\u00e2y con D\u1ebb xanh t\u1eeb h\u1ea1t. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, D\u1ebb xanh ra hoa th\u00e1ng 4 – 5 d\u01b0\u01a1ng l\u1ecbch, qu\u1ea3 ch\u00edn th\u00e1ng 10 – 11. Thu h\u00e1i qu\u1ea3 l\u00e0m gi\u1ed1ng khi v\u1ecf qu\u1ea3 chuy\u1ec3n t\u1eeb m\u00e0u xanh sang m\u00e0u n\u00e2u ho\u1eb7c n\u00e2u s\u1eabm. Kh\u1ed1i l\u01b0\u1ee3ng 1.000 h\u1ea1t khi ch\u00edn trung b\u00ecnh \u0111\u1ea1t kho\u1ea3ng 5,7kg, \u0111\u1ed9 thu\u1ea7n \u0111\u1ea1t kho\u1ea3ng 90,4%, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m \u0111\u1ea1t 84,8 – 85,0%. H\u1ea1t gi\u1ed1ng sau khi thu h\u00e1i n\u00ean gieo ngay, n\u1ebfu ch\u01b0a gieo \u0111\u01b0\u1ee3c th\u00ec c\u00f3 th\u1ec3 b\u1ea3o qu\u1ea3n trong c\u00e1t \u1ea9m theo t\u1ef7 l\u1ec7 2 ph\u1ea7n c\u00e1t: 1 ph\u1ea7n h\u1ea1t v\u1ec1 th\u1ec3 t\u00edch ho\u1eb7c \u0111\u1ec3 trong t\u1ee7 l\u1ea1nh ng\u0103n m\u00e1t nhi\u1ec7t \u0111\u1ed9 8 – 9o<\/sup>C c\u00f3 th\u1ec3 duy tr\u00ec \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m 77,1 – 79,9% sau 3 th\u00e1ng b\u1ea3o qu\u1ea3n. T\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t gi\u1ea3m m\u1ea1nh xu\u1ed1ng d\u01b0\u1edbi 50% sau 6 – 9 th\u00e1ng b\u1ea3o qu\u1ea3n. X\u1eed l\u00fd h\u1ea1t gi\u1ed1ng t\u1ed1t nh\u1ea5t l\u00e0 ng\u00e2m h\u1ea1t trong n\u01b0\u1edbc c\u00f3 nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u l\u00e0 75o<\/sup>C trong th\u1eddi gian 8 gi\u1edd, sau \u0111\u00f3 v\u1edbt ra r\u1eeda s\u1ea1ch v\u00e0 \u1ee7 trong c\u00e1t \u1ea9m. Sau 20 ng\u00e0y h\u1ea1t D\u1ebb xanh b\u1eaft \u0111\u1ea7u n\u1ea3y m\u1ea7m. T\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m \u0111\u1ea1t 84,67%. \u1ede giai \u0111o\u1ea1n 3 th\u00e1ng tu\u1ed5i c\u00f4ng th\u1ee9c che s\u00e1ng t\u1ed1t nh\u1ea5t l\u00e0 75%, giai \u0111o\u1ea1n 6 – 9 th\u00e1ng tu\u1ed5i che s\u00e1ng 50% v\u00e0 t\u1ef7 l\u1ec7 n\u00e0y ti\u1ebfp t\u1ee5c gi\u1ea3m xu\u1ed1ng c\u00f2n 25% khi c\u00e2y \u0111\u1ea1t 12 th\u00e1ng tu\u1ed5i. C\u00f4ng th\u1ee9c h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ed1i v\u1edbi t\u1ea1o c\u00e2y con D\u1ebb xanh l\u00e0 88% \u0111\u1ea5t \u0111\u00f3ng b\u1ea7u + 10% ph\u00e2n chu\u1ed3ng hoai + 2% supe l\u00e2n.<\/p>\n

T\u1eeb kh\u00f3a<\/i><\/b>: <\/i>B\u1ea3o qu\u1ea3n h\u1ea1t, ch\u1ea5t l\u01b0\u1ee3ng h\u1ea1t gi\u1ed1ng, D\u1ebb xanh<\/p>\n

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Research on determination of seed collection time, seed quality test, seed preservation and techniques to produce seedlings of De xanh\u00a0(Lithocarpus pseudosundaicus<\/i> (Hickel et A.Camus) Camus)<\/strong><\/p>\n

The study was conducted to determine the time of seed collection, seed quality test and techniques to produce seedlings of De xanh (Lithocarpus pseudosundaicus) from seeds<\/i>. The results showed that Lithocarpus pseudosundaicus <\/i>flowers from April to May, fruits ripen from October to November. One should collect seeds when fruit shells change the colour from green to brown or dark brown. The average weight of 1,000 ripe seeds is 5.7kg, the purity of seeds is about 90.4%, and the germination percentage is between 84.8% to 85.0%. After collection, seeds should be sown immediately or to be stored in moist sand at a ratio of 2 sand parts: 1 seed part in volume or kept in fridge at 8o<\/sup>C to 9 o<\/sup>C, which can maintain the germination percentage of 77.1 – 79.9% after 3 months of preservation. The germination ratio drops strongly to below 50% after 6 – 9 months of storing. The best treatment is to soak seeds in water at an initial temperature of 75o<\/sup>C in 8 hours, then picking seeds out to clean and store in moist sand. After 20 days, seeds begin to germinate. The germination percentage is 84.67%. During the first 3 months after planting, the formula of 75% of light shading is the best for seedling growth; 50% of light shading is the best for seedling growth at the stage of 6 – 9 months old and this rate should decrease to 25% when seedlings reach 12 months old. The most suitable potting mix formula for seedling production of Lithocarpus pseudosundaicus <\/i>is 88% of soil + 10% of muck and 2% of super phosphate.<\/p>\n

Keywords:<\/i><\/b> Seed maintenance, seed quality, <\/i>De xanh (Lithocarpus pseudosundaicus)<\/i><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC <\/strong>LO\u00c0I V\u00c0NG T\u00c2M (<\/i>Manglietia fordiana<\/i>) <\/i>T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA XU\u00c2N S\u01a0N T\u1ec8NH PH\u00da TH\u1ecc<\/strong><\/p>\n

H\u1ed3 Ng\u1ecdc S\u01a1n1<\/sup>, Ho\u00e0ng Anh Ngh\u0129a2<\/sup>, Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n1
\n<\/sup>1<\/sup><\/i>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Th\u00e1i Nguy\u00ean
\n<\/i>2 <\/sup><\/i>Ban D\u00e2n t\u1ed9c t\u1ec9nh Ph\u00fa Th\u1ecd<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

V\u00e0ng t\u00e2m (Manglietia fordiana<\/i>) l\u00e0 m\u1ed9t trong s\u1ed1 nh\u1eefng lo\u00e0i mang nhi\u1ec1u \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng cho khoa h\u1ecdc v\u00e0 l\u00e0 lo\u00e0i c\u00e2y ti\u1ec1m n\u0103ng c\u00f3 th\u1ec3 \u1ee9ng d\u1ee5ng trong l\u00e2m nghi\u1ec7p \u0111\u00f4 th\u1ecb, tr\u1ed3ng r\u1eebng. Hi\u1ec7n nay V\u00e0ng t\u00e2m thu\u1ed9c nh\u00f3m s\u1ebd nguy c\u1ea5p (V) trong s\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam. Nghi\u00ean c\u1ee9u n\u00e0y x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a V\u00e0ng t\u00e2m t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Xu\u00e2n S\u01a1n. Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra l\u00e2m h\u1ecdc. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y r\u1eb1ng V\u00e0ng t\u00e2m ph\u00e2n b\u1ed1 h\u1eb9p \u1edf \u0111\u1ed9 cao tr\u00ean 600m. Th\u00e2n th\u1eb3ng h\u00ecnh tr\u1ee5 v\u1ecf nh\u1eb5n m\u00e0u v\u00e0ng nh\u1ea1t hay xa\u0301m ba\u0323c, c\u00e0nh non va\u0300 ch\u00f4\u0300i ph\u1ee7 l\u00f4ng t\u01a1 m\u00e0u n\u00e2u \u00f3ng \u00e1nh. La\u0301 \u0111\u01a1n, mo\u0323c ca\u0301ch. La\u0301 da\u0300y, hi\u0300nh tr\u01b0\u0301ng ng\u01b0\u01a1\u0323c, me\u0301p nguy\u00ean, \u0111\u00e2\u0300u la\u0301 nho\u0323n g\u00e2\u0301p, \u0111u\u00f4i hi\u0300nh n\u00eam, m\u0103\u0323t tr\u00ean xanh bo\u0301ng m\u0103\u0323t d\u01b0\u01a1\u0301i tr\u0103\u0301ng ba\u0323c. Qu\u1ea3 \u0111\u1ea1i k\u00e9p h\u00ecnh tr\u1ee9ng hay h\u00ecnh tr\u00f2n d\u00e0i, g\u1ed3m r\u1ea5t nhi\u1ec1u \u0111\u1ea1i, \u0111a\u0323i co\u0301 mu\u0303i tu\u0300 vo\u0309 \u0111a\u0323i co\u0301 nhi\u00ea\u0300u n\u00f4\u0301t s\u00e2\u0300n. S\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 hi\u1ec7n nay c\u00f2n kh\u00e1 \u00edt do b\u1ecb khai th\u00e1c nhi\u1ec1u v\u00e0 kh\u1ea3 n\u0103ng t\u00e1i sinh k\u00e9m. C\u1ea7n \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o t\u1ed3n t\u1ed5ng h\u1ee3p \u0111\u1ec3 ph\u1ee5c h\u1ed3i qu\u1ea7n th\u1ec3 V\u00e0ng t\u00e2m t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Xu\u00e2n S\u01a1n.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> B\u1ea3o t\u1ed3n, sinh th\u00e1i, sinh h\u1ecdc, t\u00e1i sinh, V\u00e0ng t\u00e2m<\/p>\n

\n<\/td>\n<\/tr>\n

Some biological characteristics of Manglietia fordiana<\/i> in Xuan Son National Park, Phu Tho province<\/strong><\/p>\n

Vang tam (Manglietia fordiana<\/i>) is one of species with high scientific value, having good potential to use in plantation or lanscape. It is classified as vulnerable in Red book of Vietnam. This study examined some key bilogical characteristics of the species in Xuan Son National park. This study used common forestry examination methods. Study showed that Manglietia fordian<\/i>a<\/i> distributed at elevation above 600m. Stem is tube shape with light yellow or light grey skin. Young branch and bud have shining yellow hair. Leaves have egg shape, single leave with pointed head, green top side and light down side. Fruits are egg shaped or long rounded consisting of smaller seed parts. Number of species found in Xuan Son National park was limited due to heavy exploitation and limited regeneration capacity. It is recommended to apply comprehensive technical methods to regenerate Vang tam population in Xuan Son National Park.<\/p>\n

Key words:<\/i><\/b> M<\/i>anglietia \u00a0fordiana<\/i>, biological, ecological, conservation, regeneration<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

K\u1ebeT QU\u1ea2 B\u01af\u1edaC \u0110\u1ea6U NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M SINH H\u1eccC<\/strong>
\n C\u1ee6A M\u1ed8T S\u1ed0 D\u00d2NG M\u1eaeC CA (Macadamia integrifolia<\/i> Maiden & Betche) T\u1ea0I HUY\u1ec6N TAM \u0110\u01af\u1edcNG, T\u1ec8NH LAI CH\u00c2U<\/strong><\/p>\n

\u0110\u00e0o Thanh V\u00e2n1*<\/sup>, Nguy\u1ec5n V\u0103n Bi\u1ec3n2
\n<\/sup>1<\/sup><\/i>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Th\u00e1i Nguy\u00ean
\n2<\/sup>Chi c\u1ee5c Ki\u1ec3m l\u00e2m t\u1ec9nh Lai Ch\u00e2u<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

N\u0103m d\u00f2ng M\u1eafc ca (Macadamia integrifolia <\/i>Maiden & Betche): d\u00f2ng 246, d\u00f2ng 849, d\u00f2ng OC, d\u00f2ng 816, v\u00e0 d\u00f2ng 842 tr\u1ed3ng \u1edf huy\u1ec7n Tam \u0110\u01b0\u1eddng, t\u1ec9nh Lai Ch\u00e2u c\u00e2y sinh tr\u01b0\u1edfng t\u1ed1t, h\u1eb1ng n\u0103m c\u00e2y c\u00f3 3 \u0111\u1ee3t ch\u1ed3i ch\u00ednh l\u00e0 v\u1ee5 Xu\u00e2n, v\u1ee5 H\u00e8 v\u00e0 v\u1ee5 Thu. Sau 3 n\u0103m tr\u1ed3ng, d\u00f2ng OC v\u00e0 d\u00f2ng 816 cho t\u1ef7 l\u1ec7 \u0111\u1eadu qu\u1ea3 cao (3,73% v\u00e0 2,62%), s\u1ed1 l\u01b0\u1ee3ng qu\u1ea3 c\u1ee7a d\u00f2ng OC \u0111\u1ea1t 246 qu\u1ea3\/c\u00e2y v\u00e0 d\u00f2ng 816 \u0111\u1ea1t 162,3 qu\u1ea3\/c\u00e2y. N\u0103ng su\u1ea5t qu\u1ea3 d\u00f2ng OC \u0111\u1ea1t 4,54 kg\/c\u00e2y v\u00e0 d\u00f2ng 816 \u0111\u1ea1t 3,08 kg\/c\u00e2y. D\u00f2ng OC v\u00e0 d\u00f2ng 816 c\u00f3 kh\u1ea3 n\u0103ng th\u00edch nghi v\u00e0 ph\u00e1t tri\u1ec3n t\u1ed1t t\u1ea1i huy\u1ec7n Tam \u0110\u01b0\u1eddng, t\u1ec9nh Lai Ch\u00e2u.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> D\u00f2ng 246, d\u00f2ng 849, d\u00f2ng OC, d\u00f2ng 816, d\u00f2ng 842, M\u1eafc ca<\/p>\n

 <\/td>\n<\/tr>\n

Initial results in reseach of biological characters of some macadamin (<\/strong>Macadamia integrifolia<\/strong><\/i>) cultivars in Tam Duong district, Lai Chau province<\/strong><\/p>\n

Several cultivars of Macadamia (Macadamia integrifolia <\/i>Maiden & Betche) including 246, 849, OC, 816 and 842 well adapted to growing conditions in Tam Duong district, Lai Chau province. Trees grew and well developed with three main budding seasons (spring, summer and autumn). After 3 years planting, OC and 816 cultivars performed highest fruiting rates (3.37% and 2.62%, respectively). The number of fruits were 246.0 fruits\/tree in OC cultivar and 162.3 fruits\/tree in 816 cultivar. The yield of OC and 816 cultivars were 4.54 kg\/tree and 3.08 kg\/tree, respectively. These are good cultivars which can be able to grow successfully in Tam Duong district, Lai Chau province.<\/p>\n

Key words:<\/i><\/b> <\/b>246 cultivar, 849 cultivar, OC cultivar, 816 cultivar, 842 cultiv, Macadamia<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

BI\u1ebeN \u0110\u1ed8NG C\u1ea4U TR\u00daC V\u00c0 CH\u1ea4T L\u01af\u1ee2NG T\u1ea6NG C\u00c2Y CAO R\u1eeaNG T\u1ef0 NHI\u00caN T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA KON KA KINH, GIA LAI<\/strong><\/p>\n

B\u00f9i M\u1ea1nh H\u01b0ng, L\u00ea Xu\u00e2n Tr\u01b0\u1eddng
\nTr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u1ea5u tr\u00fac r\u1eebng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c h\u1ec7 sinh th\u00e1i r\u1eebng. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra cho th\u1ea5y \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh c\u1ee7a c\u00e1c tr\u1ea1ng th\u00e1i l\u00e0 14,6cm (r\u1eebng IIb) v\u00e0 24,4cm (r\u1eebng IV). M\u1ee9c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng l\u1edbn h\u01a1n \u1edf tr\u1ea1ng th\u00e1i r\u1eebng IV v\u00e0 nh\u1ecf h\u01a1n \u1edf tr\u1ea1ng th\u00e1i r\u1eebng IIb. M\u00f4 h\u00ecnh tuy\u1ebfn t\u00ednh h\u1ed7n h\u1ee3p kh\u1eb3ng \u0111\u1ecbnh s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao gi\u1eefa hai lo\u1ea1i r\u1eebng l\u00e0 r\u1ea5t r\u00f5 r\u1ec7t, \u1ea3nh h\u01b0\u1edfng ng\u1eabu nhi\u00ean l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3 v\u1edbi \u0111\u01b0\u1eddng k\u00ednh, nh\u01b0ng t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn v\u1edbi chi\u1ec1u cao. K\u1ebft qu\u1ea3 ch\u1ec9 s\u1ed1 AIC cho th\u1ea5y r\u1eb1ng: \u0111\u1ed1i v\u1edbi c\u1ea3 ph\u00e2n b\u1ed1 s\u1ed1 c\u00e2y theo \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao th\u00ec ph\u00e2n b\u1ed1 Lognormal c\u00f3 kh\u1ea3 n\u0103ng m\u00f4 ph\u1ecfng t\u1ed1t nh\u1ea5t. \u0110\u1ed9 d\u1ed1c c\u1ee7a \u0111\u01b0\u1eddng t\u01b0\u01a1ng quan r\u1eebng IV nh\u1ecf h\u01a1n r\u1eebng IIb. \u0110\u1ed9 d\u00e0i c\u1ee7a \u0111o\u1ea1n t\u01b0\u01a1ng quan c\u0169ng l\u1edbn h\u01a1n. T\u1ea1i r\u1eebng IIb, chi\u1ec1u cao d\u01b0\u1edbi c\u1ea3nh c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn nh\u1ea5t \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y r\u1eebng, sau \u0111\u00f3 \u0111\u1ebfn chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh. C\u0169ng v\u1edbi lo\u1ea1i r\u1eebng n\u00e0y th\u00ec h\u1ec7 s\u1ed1 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp (AHTT) nh\u1ecf h\u01a1n h\u1ec7 s\u1ed1 \u1ea3nh h\u01b0\u1edfng gi\u00e1n ti\u1ebfp (AHGT). V\u00ec v\u1eady ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y r\u1eebng c\u00f2n ch\u1ecbu \u1ea3nh h\u01b0\u1edfng r\u1ea5t nhi\u1ec1u b\u1edfi c\u00e1c nh\u00e2n t\u1ed1 kh\u00e1c nh\u01b0 l\u01b0\u1ee3ng m\u01b0a, \u0111\u1ea5t \u0111ai, kh\u00ed h\u1eadu… Ng\u01b0\u1ee3c l\u1ea1i, t\u1ea1i r\u1eebng IV, h\u1ec7 s\u1ed1 AHTT l\u1edbn h\u01a1n r\u1ea5t nhi\u1ec1u h\u1ec7 s\u1ed1 gi\u00e1n ti\u1ebfp. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y r\u1eebng \u0111\u00e3 \u0111i v\u00e0o \u1ed5n \u0111\u1ecbnh, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y r\u1eebng \u00edt b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c nh\u00e2n t\u1ed1 b\u00ean ngo\u00e0i. T\u1ef7 l\u1ec7 c\u00e2y c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t v\u00e0 trung b\u00ecnh (A v\u00e0 B) c\u1ee7a r\u1eebng IV l\u00e0 87,60%, trong khi \u0111\u00f3 t\u1ef7 l\u1ec7 n\u00e0y c\u1ee7a r\u1eebng th\u1ee9 sinh ngh\u00e8o ki\u1ec7t IIb l\u00e0 83,65%. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y r\u1eebng gi\u1eefa hai tr\u1ea1ng th\u00e1i l\u00e0 th\u1ef1c s\u1ef1 r\u00f5 r\u1ec7t, do gi\u00e1 tr\u1ecb p-value c\u1ee7a ti\u00eau chu\u1ea9n Chi-squared nh\u1ecf h\u01a1n 0,05.<\/p>\n

T\u1eeb kh\u00f3a:<\/i> <\/b>C\u1ea5u tr\u00fac r\u1eebng, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y r\u1eebng, ph\u00e2n b\u1ed1 t\u1ea7n s\u1ed1, m\u00f4 h\u00ecnh tuy\u1ebfn t\u00ednh h\u1ed7n h\u1ee3p<\/p>\n

 <\/td>\n<\/tr>\n

Changes in structure and quality of natural forest overstorey in National park Kon Ka Kinh, Gia Lai<\/strong><\/p>\n

Forest structure plays a very important role in forest ecosystem management. Analysis results show that the average diameters of stages are 14.67cm (type IIb) and 24.4cm (type IV). The variability of the growth indicators is also greater in type IV and smaller in type IIb. The mixed linear model confirms the difference in diameter and height between the two types is very significant, random effects are negligible with diameter, but relatively important to height. The AIC results indicate that for diameter and height frequency distribution, the Lognormal distribution is best simulated. Slope of correlation line of IV forests is smaller than II forests. The length of the correlation line is also greater. In type IIb, the commercial height has the greatest effect on the tree quality, then the height and diameter. In this type of forest, direct impact is less than the indirect effect coefficient, so the quality of forest trees is greatly influenced by other factors such as rainfall, climate, soil condition and so on. In contrast, IV forest, the direct effect coefficient is much greater than the indirect coefficient. This shows that the forest has been stable and the quality of forest trees is less influenced by outside factors. The percentage of good and average trees (A and B) of forest IV is 87.60%. While this rate of poor secondary forest IIb is 83.65%. The difference in the quality of the trees between the two states is really significant, as the p-value of the Chi-squared test is less than 0.05.<\/p>\n

Keywords:<\/i><\/b> Forest structure, forest tree quality, frequency distribution, linear mixed model<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC V\u00c0 M\u1ed0I QUAN H\u1ec6 C\u1ee6A LO\u00c0I C\u00c2Y S\u1ebeN TRUNG (Homalium ceylanicum<\/i> (Gardner) Benth) V\u1edaI C\u00c1C LO\u00c0I KH\u00c1C TRONG R\u1eeaNG T\u1ef0 NHI\u00caN <\/strong>\u1ede HUY\u1ec6N NAM \u0110\u00d4NG V\u00c0 PH\u00da L\u1ed8C, T\u1ec8NH TH\u1eeaA THI\u00caN HU\u1ebe<\/strong><\/p>\n

V\u0169 \u0110\u1ee9c B\u00ecnh1<\/sup>, Nguy\u1ec5n V\u0103n L\u1ee3i2<\/sup>, L\u00ea Xu\u00e2n Tr\u01b0\u1eddng3
\n<\/sup>1 <\/sup><\/i>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p B\u1eafc Trung b\u1ed9
\n2 <\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Hu\u1ebf; 3 <\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/b><\/p>\n

S\u1ebfn trung (Homalium ceylanicum<\/i> (Gardner) Benth) l\u00e0 c\u00e2y g\u1ed7 l\u1edbn thu\u1ed9c h\u1ecd M\u00f9ng qu\u00e2n (Flacourtiaceae). K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean t\u1ea1i huy\u1ec7n Nam \u0110\u00f4ng v\u00e0 Ph\u00fa L\u1ed9c cho th\u1ea5y, S\u1ebfn trung c\u00f3 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n l\u1edbn h\u01a1n so v\u1edbi \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao b\u00ecnh qu\u00e2n c\u1ee7a l\u00e2m ph\u1ea7n. T\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y cao dao \u0111\u1ed9ng t\u1eeb 29 \u0111\u1ebfn 56 lo\u00e0i. C\u00e1c lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf nh\u01b0 D\u1ebb gai sapa, Tr\u00e2m m\u1ed1c, Tr\u00e1m tr\u1eafng, M\u00edt n\u00e0i, Ng\u00e1t, Ch\u00f2 \u0111en, Tr\u00e2m t\u00e1n, M\u00e1u ch\u00f3 v\u00e0 Tr\u01b0\u1eddng v\u1ea3i. S\u1ebfn trung kh\u00f4ng ph\u1ea3i l\u00e0 lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf sinh th\u00e1i v\u00e0 \u00edt c\u00f3 vai tr\u00f2 trong vi\u1ec7c ki\u1ebfn t\u1ea1o ho\u00e0n c\u1ea3nh r\u1eebng. C\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng trong khu v\u1ef1c nghi\u00ean c\u1ee9u \u0111\u1ec1u c\u00f3 3 t\u1ea7ng t\u00e1n (A1, A2, A3), trong \u0111\u00f3 S\u1ebfn trung t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf t\u1ea7ng A2. S\u1ef1 ch\u00eanh l\u1ec7ch v\u1ec1 chi\u1ec1u cao b\u00ecnh qu\u00e2n c\u1ee7a S\u1ebfn trung so v\u1edbi l\u00e2m ph\u1ea7n l\u00e0 \u0111\u00e1ng k\u1ec3. Nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra \u00f4 6 c\u00e2y v\u00e0 c\u0103n c\u1ee9 v\u00e0o ch\u1ec9 s\u1ed1 t\u1ea7n su\u1ea5t xu\u1ea5t hi\u1ec7n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ed1i quan h\u1ec7 gi\u1eefa S\u1ebfn trung v\u00e0 c\u00e1c lo\u00e0i kh\u00e1c trong r\u1eebng t\u1ef1 nhi\u00ean. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u0169ng cho th\u1ea5y, S\u1ebfn trung th\u01b0\u1eddng ph\u00e2n b\u1ed1 r\u1ea3i r\u00e1c \u1edf c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean h\u1ed7n lo\u00e0i l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh v\u1edbi t\u00ednh qu\u1ea7n th\u1ee5 c\u1ee7a S\u1ebfn trung r\u1ea5t th\u1ea5p. C\u00f3 25 lo\u00e0i c\u00e2y xu\u1ea5t hi\u1ec7n c\u00f9ng lo\u00e0i S\u1ebfn trung v\u00e0 lo\u00e0i c\u00e2y b\u1ea1n r\u1ea5t hay g\u1eb7p v\u1edbi S\u1ebfn trung l\u00e0 D\u1ebb gai Sapa, Tr\u00e1m tr\u1eafng, Ch\u00f2 \u0111en; Tr\u00e1m tr\u1eafng v\u00e0 D\u1ebb gai Sapa. \u0110\u00e2y l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y b\u1ea1n c\u00f3 th\u1ec3 tr\u1ed3ng r\u1eebng h\u1ed7n giao v\u1edbi S\u1ebfn trung.<\/p>\n

T\u1eeb kh\u00f3a:<\/i> <\/b>C\u1ea5u tr\u00fac r\u1eebng, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y r\u1eebng, ph\u00e2n b\u1ed1 t\u1ea7n s\u1ed1, m\u00f4 h\u00ecnh tuy\u1ebfn t\u00ednh h\u1ed7n h\u1ee3p<\/p>\n

 <\/td>\n<\/tr>\n

Research on structural characteristics and relationship between Hainan homalium (Homalium ceylanicum <\/i>(Gardner) Benth)<\/i> and other species in natural forests of Nam Dong and Phu Loc districts, Thua Thien Hue province<\/strong><\/p>\n

Hainan homalium (Homalium ceylanicum<\/i> (Gardner) Benth) is a large tree species of the Flacourtiaceae family. Research results in Nam Dong and Phu Loc districts show that Hainan homalium has mean diameter and especially mean height higher than that of the forest stand. The fomulation of tall trees ranges from 29 to 56 species including some dominant species such as Castanopsis chapaensis, Syzygium cuminii<\/i>, Canarium album, Artocarpus asperula, Gironniera subaequalis, Parashorea <\/i>stellata,<\/i> Memecylon umbellatum<\/i>, Knema globularia <\/i>and Paranephelium spirei<\/i>. Hainan homalium is not an ecologically dominant species and have little role in the creation of forest situation. The forest floor structure consists of 3 layers (A1, A2, A3), in which Hainan homalium concentrated mainly in A2 layer. Difference in mean height of its compared to the forest stand is significant. Research on relationship between Hainan homalium and other species in natural forests, used survey methods are \u201c6 tree plot<\/i>\u201d and appearing frequency index. The results also show that Hainan homalium has low population density, often distributed scattered of mixed evergreen broadleaf forest; Number of species appearing with Hainan homalium are 25 species. This species often appears three other native tree species with very high frequence, including Canarium album<\/i>, Parashorea chinensis<\/i>, Castanopsis chapaensis<\/i>. Hainan homalium can plant mixed forests with Canarium album <\/i>and Castanopsis chapaensis<\/i>.<\/p>\n

Keywords:<\/i><\/b> Forest structure, forest tree quality, frequency distribution, linear mixed model<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

SPATIAL DISTRIBUTION OF OVERSTOREY TREES<\/strong>
\n ANALYZED BY REPLICATED POINT PATTER METHOD IN R<\/strong><\/p>\n

B\u00f9i M\u1ea1nh H\u01b0ng1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i2
\n<\/sup>1<\/sup><\/i> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n2<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/i><\/p>\n\n\n\n\n
SUMMARY<\/p>\n

In the forest structure, the spatial distribution of forest trees plays a very important role. The importance of the spatial distribution is to influence the sampling design of forest inventory, timber production, and the need for silvicultural treatments in a stand. The analysis results show that the difference between the two types is significant. Spatial distribution pattern of trees on the ground is more homogeneous in the secondary forest, whereas it is very diverse in the old-growth forest. The G-test and the pair correlation function results show that the spatial distribution of forest trees is random in the regenerating forest. Conversely, the tree distributes more regularly in the old-growth forest. Up to 80% of plots in the old forest show this trend. The Envelope function demonstrates that the spatial distribution variation in young forests is much lower than in the primary forest. In addition, the plants with the same diameter also distribute randomly in stage IIb and regularly in stage IV. The replicated point pattern analysis is very new. It is very useful for small investigated plots with repetitions. It should be applied in Vietnam with the support of R.Keywords:<\/i> <\/b>Forestry data, forest structure, replicated point pattern, R language, spatial distribution<\/p>\n

 <\/td>\n<\/tr>\n

Ph\u00e2n b\u1ed1 kh\u00f4ng gian c\u1ee7a c\u00e2y t\u1ea7ng cao ph\u00e2n t\u00edch b\u1edfi ph\u01b0\u01a1ng ph\u00e1p l\u1eb7p \u0111i\u1ec3m trong R<\/strong><\/p>\n

Trong ph\u00e2n t\u00edch c\u1ea5u tr\u00fac r\u1eebng, th\u00ec ph\u00e2n b\u1ed1 kh\u00f4ng gian \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng. T\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 th\u1ec3 hi\u1ec7n \u1edf vi\u1ec7c ph\u00e2n b\u1ed1 kh\u00f4ng gian s\u1ebd \u1ea3nh h\u01b0\u1edfng t\u1edbi c\u00f4ng t\u00e1c thi\u1ebft k\u1ebf r\u00fat m\u1eabu trong \u0111i\u1ec1u tra r\u1eebng, n\u0103ng su\u1ea5t g\u1ed7 v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p l\u00e2m sinh t\u00e1c \u0111\u1ed9ng v\u00e0o r\u1eebng. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch \u0111\u00e3 cho th\u1ea5y r\u1eb1ng ph\u00e2n b\u1ed1 kh\u00f4ng gian r\u1ea5t kh\u00e1c bi\u1ec7t gi\u1eefa hai tr\u1ea1ng th\u00e1i r\u1eebng. Ph\u00e2n b\u1ed1 kh\u00f4ng gian kh\u00e1 \u0111\u1ed3ng nh\u1ea5t gi\u1eefa c\u00e1c \u00f4 t\u1ea1i r\u1eebng th\u1ee9 sinh, v\u00e0 bi\u1ebfn \u0111\u1ed9ng m\u1ea1nh \u1edf r\u1eebng gi\u00e0. K\u1ebft qu\u1ea3 h\u00e0m G v\u00e0 h\u00e0m t\u01b0\u01a1ng quan c\u1eb7p cho th\u1ea5y ph\u00e2n b\u1ed1 l\u00e0 ng\u1eabu nhi\u00ean t\u1ea1i r\u1eebng IIb. Ng\u01b0\u1ee3c l\u1ea1i, ph\u00e2n b\u1ed1 c\u00f3 xu h\u01b0\u1edbng \u0111\u1ec1u h\u01a1n \u1edf r\u1eebng gi\u00e0. C\u00f3 t\u1edbi 80% s\u1ed1 \u00f4 \u1edf r\u1eebng gi\u00e0 th\u1ec3 hi\u1ec7n xu h\u01b0\u1edbng n\u00e0y. K\u1ebft qu\u1ea3 c\u1ee7a h\u00e0m Envelop \u0111\u00e3 ch\u1ee9ng minh r\u1eb1ng bi\u1ebfn \u0111\u1ed9ng ph\u00e2n b\u1ed1 \u1edf r\u1eebng th\u1ee9 sinh l\u00e0 r\u1ea5t th\u1ea5p so v\u1edbi r\u1eebng nguy\u00ean sinh. H\u01a1n n\u1eefa, c\u00e1c c\u00e2y r\u1eebng c\u00f3 c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh th\u01b0\u1eddng ph\u00e2n b\u1ed1 m\u1ed9t c\u00e1ch ng\u1eabu nhi\u00ean \u1edf r\u1eebng th\u1ee9 sinh v\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ec1u h\u01a1n \u1edf r\u1eebng gi\u00e0. Ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch \u0111\u1eb7c \u0111i\u1ec3m ph\u00e2n b\u1ed1 c\u00f3 l\u1eb7p l\u00e0 ph\u01b0\u01a1ng ph\u00e1p r\u1ea5t m\u1edbi. N\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p tr\u01b0\u1eddng h\u1ee3p m\u00e0 c\u00e1c \u00f4 m\u1eabu \u0111i\u1ec1u tra nh\u1ecf, c\u00f3 l\u1eb7p. V\u00e0 ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u1ef1c s\u1ef1 n\u00ean \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong nghi\u00ean c\u1ee9u \u1edf Vi\u1ec7t Nam v\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 b\u1edfi ng\u00f4n ng\u1eef R.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> C\u1ea5u tr\u00fac r\u1eebng, ng\u00f4n ng\u1eef R, ph\u00e2n t\u00edch \u0111i\u1ec3m l\u1eb7p, ph\u00e2n b\u1ed1 kh\u00f4ng gian, s\u1ed1 li\u1ec7u l\u00e2m nghi\u1ec7p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u0110\u1ecaNH L\u01af\u1ee2NG CACBON C\u1ee6A R\u1eeaNG TR\u1ed2NG THU\u1ea6N LO\u00c0I B\u1ea6N CHUA (Sonneratia caseolaris)<\/i> \u1ede VEN BI\u1ec2N HUY\u1ec6N H\u1eacU L\u1ed8C, T\u1ec8NH THANH H\u00d3A<\/strong><\/p>\n

Nguy\u1ec5n Th\u1ecb H\u1ed3ng H\u1ea1nh1*<\/sup>, Tr\u1ea7n Ho\u00e0ng \u00c1nh Ng\u1ecdc2
\n<\/sup>1<\/sup><\/i>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e0i nguy\u00ean v\u00e0 M\u00f4i tr\u01b0\u1eddng H\u00e0 N\u1ed9i
\n2<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u S\u00e0nh s\u1ee9 Th\u1ee7y tinh C\u00f4ng nghi\u1ec7p H\u00e0 N\u1ed9i<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nh\u1eb1m ph\u1ee5c v\u1ee5 qu\u1ea3n l\u00fd Nh\u00e0 n\u01b0\u1edbc v\u1ec1 gi\u1ea3m ph\u00e1t th\u1ea3i kh\u00ed nh\u00e0 k\u00ednh, cung c\u1ea5p c\u01a1 s\u1edf khoa h\u1ecdc v\u00e0 c\u00e1c th\u00f4ng tin cho vi\u1ec7c \u0111\u00e0m ph\u00e1n qu\u1ed1c t\u1ebf trong c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh th\u1ef1c hi\u1ec7n c\u1eaft gi\u1ea3m kh\u00ed nh\u00e0 k\u00ednh t\u1ea1i d\u1ea3i ven bi\u1ec3n B\u1eafc Trung b\u1ed9 Vi\u1ec7t Nam, ch\u00fang t\u00f4i \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng t\u1ea1o b\u1ec3 ch\u1ee9a cacbon c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n tr\u1ed3ng thu\u1ea7n lo\u00e0i B\u1ea7n chua (Sonneratia caseolaris<\/i>) <\/b>7, 6, 5 tu\u1ed5i <\/b>ven bi\u1ec3n huy\u1ec7n H\u1eadu L\u1ed9c, t\u1ec9nh Thanh H\u00f3a th\u00f4ng qua 3 b\u1ec3 ch\u1ee9a cacbon trong r\u1eebng: (1) B\u1ec3 ch\u1ee9a cacbon trong th\u1ef1c v\u1eadt \u1edf tr\u00ean m\u1eb7t \u0111\u1ea5t; (2) B\u1ec3 ch\u1ee9a cacbon trong th\u1ef1c v\u1eadt \u1edf d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t; (3) B\u1ec3 ch\u1ee9a cacbon trong \u0111\u1ea5t, d\u01b0\u1edbi d\u1ea1ng cacbon h\u1eefu c\u01a1 (IPCC, 2006). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, kh\u1ea3 n\u0103ng t\u1ea1o b\u1ec3 ch\u1ee9a cacbon c\u1ee7a r\u1eebng t\u0103ng d\u1ea7n theo tu\u1ed5i r\u1eebng. R\u1eebng 7 tu\u1ed5i c\u00f3 kh\u1ea3 n\u0103ng t\u00edch l\u0169y 21,10 t\u1ea5n\/ha\/n\u0103m – t\u01b0\u01a1ng \u1ee9ng v\u1edbi l\u01b0\u1ee3ng CO2 <\/sub>l\u00e0 77,43 t\u1ea5n\/ha\/n\u0103m, th\u1ee9 2 l\u00e0 r\u1eebng 6 tu\u1ed5i v\u1edbi 16,86 t\u1ea5n\/ha\/n\u0103m – t\u01b0\u01a1ng \u1ee9ng v\u1edbi l\u01b0\u1ee3ng CO2<\/sub>l\u00e0 61,87 t\u1ea5n \/ha\/n\u0103m, th\u1ea5p nh\u1ea5t l\u00e0 r\u1eebng 5 tu\u1ed5i v\u1edbi 10,70 t\u1ea5n\/ha\/n\u0103m – t\u01b0\u01a1ng \u1ee9ng l\u01b0\u1ee3ng CO2<\/sub> l\u00e0 39,27 t\u1ea5n\/ha\/n\u0103m. Nh\u01b0 v\u1eady, sau m\u1ed9t n\u0103m \u1edf c\u00e1c tu\u1ed5i r\u1eebng nghi\u00ean c\u1ee9u, l\u01b0\u1ee3ng cacbon t\u00edch l\u0169y c\u1ee7a r\u1eebng \u0111\u1ec1u t\u0103ng, \u0111i\u1ec1u \u0111\u00f3 ch\u1ee9ng t\u1ecf r\u1eebng \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o v\u1ec7 t\u1ed1t, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c th\u1ef1c hi\u1ec7n c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh c\u1eaft gi\u1ea3m kh\u00ed nh\u00e0 k\u00ednh \u1edf d\u1ea3i ven bi\u1ec3n B\u1eafc Trung b\u1ed9 Vi\u1ec7t Nam.<\/p>\n

T\u1eeb kh\u00f3a<\/i>: B\u1ec3 ch\u1ee9a cacbon, kh\u00ed nh\u00e0 k\u00ednh, lo\u00e0i trang, r\u1eebng ng\u1eadp m\u1eb7n, REDD+<\/sup><\/p>\n

 <\/td>\n<\/tr>\n

Study on carbon quatification of the plantation Sonneratia caseolaris<\/i> in the coastal area of Hau Loc district, Thanh Hoa province<\/strong><\/p>\n

To improve the state management of greenhouse gas emissions, provide scientific basis and information for international negotiations in programs of greenhouse gas reductions in the North Central Coast of Vietnam, we assessed carbon sink formation of mangrove plantation Sonneratia caseolaris<\/i> of 7, 6, 5 years old in the coastal areas of Hau Loc district, Thanh Hoa province through 3 carbon pools: (1) aboveground biomass pool, (2) underground biomass pool and (3) organic carbon in soil (IPCC, 2006). The results show that carbon sink of Sonneratia caseolaris<\/i> increases with age. The 7 – year-old mangrovres accumulate 21.10 tons C\/ha \/year – corresponding to 77.43 tons CO2<\/sub>\/ha\/year, the 6 – year-old mangroves with 16.86 tons C\/ha\/year corresponding to 61.87 tons CO2<\/sub>\/ha\/year, the 5 – year-old forest with 10.70 tons C\/ha\/year – equivalent to 39.27 tons CO2<\/sub>\/ha\/year. Thus, after one year the mangrove plantation Sonneratia caseolaris<\/i>, the C cumulation increases, indicating that the forest is well managed and protected. This result is the scientific basis for the implementation of greenhouse gas reduction program in the North Central Coast of Vietnam.<\/p>\n

Keywords:<\/i><\/b> Carbon sink, greenhouse gas, Sonneratia caseolaris, <\/i>mangroves, REDD+<\/sup><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u1eec D\u1ee4NG \u1ea2NH LANDSAT X\u00c1C \u0110\u1ecaNH CH\u1ec8 S\u1ed0 KH\u00d4 H\u1ea0N<\/strong>
\n NHI\u1ec6T \u0110\u1ed8 TH\u1ef0C V\u1eacT V\u00c0 M\u1ed0I T\u01af\u01a0NG QUAN V\u1edaI NDVI<\/strong>
\n T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA C\u00c1T B\u00c0, TH\u00c0NH PH\u1ed0 H\u1ea2I PH\u00d2NG<\/strong>
\n GIAI \u0110O\u1ea0N 2006 – 2013<\/strong><\/p>\n

Nguy\u1ec5n H\u1ea3i H\u00f2a
\nB\u1ed9 m\u00f4n K\u1ef9 thu\u1eadt M\u00f4i tr\u01b0\u1eddng, T<\/i>r\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Vi\u1ec7c \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 vi\u1ec5n th\u00e1m v\u00e0 GIS \u0111ang di\u1ec5n ra r\u1ea5t m\u1ea1nh m\u1ebd trong nghi\u00ean c\u1ee9u t\u00e0i nguy\u00ean v\u00e0 m\u00f4i tr\u01b0\u1eddng, \u0111\u1eb7c bi\u1ec7t x\u00e1c \u0111\u1ecbnh c\u00e1c m\u1ed1i t\u01b0\u01a1ng quan gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 sinh th\u00e1i v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 kh\u00ed t\u01b0\u1ee3ng trong b\u1ed1i c\u1ea3nh bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu. Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh ch\u1ec9 s\u1ed1 kh\u00f4 h\u1ea1n nhi\u1ec7t \u0111\u1ed9 th\u1ef1c v\u1eadt th\u00f4ng qua t\u01b0 li\u1ec7u vi\u1ec5n th\u00e1m khu v\u1ef1c VQG C\u00e1t B\u00e0, Th\u00e0nh ph\u1ed1 H\u1ea3i Ph\u00f2ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u00e0 \u0111\u00e3 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 th\u1ea3m ph\u1ee7 th\u00f4ng qua ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt NDVI, b\u1ea3n \u0111\u1ed3 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t \u0111\u1ea5t v\u00e0 gi\u00e1 tr\u1ecb ch\u1ec9 s\u1ed1 kh\u00f4 h\u1ea1n nhi\u1ec7t \u0111\u1ed9 th\u1ef1c v\u1eadt. K\u1ebft qu\u1ea3 cho th\u1ea5y gi\u00e1 tr\u1ecb ch\u1ec9 s\u1ed1 NDVI dao \u0111\u1ed9ng t\u1eeb -0,32 \u00f7 0,46, gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t dao \u0111\u1ed9ng t\u1eeb 20,61 \u00f7 28,44o<\/sup>C v\u00e0 ch\u1ec9 s\u1ed1 TVDI dao \u0111\u1ed9ng t\u1eeb -1,23 e-6<\/sup> \u00f7 1,0. Nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u00e2n c\u1ea5p m\u1ee9c \u0111\u1ed9 kh\u00f4 h\u1ea1n theo nh\u00f3m t\u00e1c gi\u1ea3 Han v\u00e0 \u0111\u1ed3ng t\u00e1c gi\u1ea3 (2010), tr\u00ean c\u01a1 s\u1edf c\u1ea5p m\u1ee9c \u0111\u1ed9 kh\u00f4 h\u1ea1n nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh t\u01b0\u01a1ng quan gi\u1eefa gi\u00e1 tr\u1ecb NDVI v\u00e0 TVDI cho hai n\u0103m 2006 v\u00e0 2013. K\u1ebft qu\u1ea3 t\u1eeb hai m\u00f4 h\u00ecnh cho th\u1ea5y m\u1ed1i t\u01b0\u01a1ng quan gi\u1eefa hai ch\u1ec9 s\u1ed1 r\u1ea5t ch\u1eb7t v\u1edbi h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan R2<\/sup>> 0,95 v\u1edbi P value <0,0001. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u l\u00e0 c\u01a1 s\u1edf khoa h\u1ecdc ban \u0111\u1ea7u cho vi\u1ec7c nghi\u00ean c\u1ee9u m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 kh\u00ed t\u01b0\u1ee3ng v\u00e0 y\u1ebfu t\u1ed1 sinh th\u00e1i d\u1ef1a tr\u00ean t\u01b0 li\u1ec7u \u1ea3nh vi\u1ec5n th\u00e1m trong b\u1ed1i c\u1ea3nh bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu khu v\u1ef1c VQG C\u00e1t B\u00e0, Th\u00e0nh ph\u1ed1 H\u1ea3i Ph\u00f2ng.<\/p>\n

T\u1eeb kh\u00f3a<\/b>: Bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt, Landsat, nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t, VQG C\u00e1t B\u00e0<\/p>\n

 <\/td>\n<\/tr>\n

Using landsat to determine Temperature Dryness Vegetation Index (TVDI) and relationships with NDVI in Cat Ba National Park, Hai Phong city during 2006 – 2013<\/strong><\/p>\n

Remote sensing and GIS have been applying intensively and extensively in resources and environmental management, in particular determination of the relationships between the ecolgical and meteorological factors in a changing climate. Study has identified the values of Temperature Vegetation Dryness Index (TVDI) through using Landsat data in Cat Ba National Park, Hai Phong city; constructed land covers through Normalised Difference Vegetation Index (NDVI), Land Surface Temperature (LST) and TVDI maps. The findings showed that NDVI values \u200b\u200branged from -0.32 \u00f7 12:46, 20.61 \u00f7 28.44o<\/sup>C for LST and -1.23e-6<\/sup> \u00f7 1.0 for TVDI. In addition, study has classified TVDI values into five dryness conditions, which was adapted from Han et al., (2010) and constructed the models of the relationship between NDVI values \u200b\u200band TVDI for 2006 and 2013 successfully. As a result of model construction, two models showed that there were strong correlations between the two indices with very high R2<\/sup> coefficient > 0.95 and P value <0.0001. The research results have provided a scientific base forfurther study of the relationship between meteorological and ecological factors using remote sensing data in Cat Ba National Park, Hai Phong city under the context of climate change.<\/p>\n

Keywords<\/i><\/b>:<\/i> Climate change, vegetation index, Landsat, surface temperature, Cat Ba National Park<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u1eec D\u1ee4NG \u1ea2NH LANDSAT X\u00c1C \u0110\u1ecaNH CH\u1ec8 S\u1ed0 DI\u1ec6N T\u00cdCH L\u00c1 (LAI) V\u00c0 M\u1ed0I T\u01af\u01a0NG QUAN V\u1edaI L\u01af\u1ee2NG M\u01afA <\/strong>T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA C\u00c1T B\u00c0, TP H\u1ea2I PH\u00d2NG <\/strong>GIAI \u0110O\u1ea0N 1996 – 2016<\/strong><\/p>\n

Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n1<\/sup>, Nguy\u1ec5n H\u1ea3i H\u00f2a2<\/sup>
\n1<\/sup><\/i>Khoa L\u00e2m nghi\u1ec7p, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng <\/i>L<\/i>\u00e2m Th\u00e1i Nguy\u00ean<\/i>
\n2<\/sup>B\u1ed9 m\u00f4n K\u1ef9 thu\u1eadt M\u00f4i tr\u01b0\u1eddng, T<\/i>r\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Vi\u1ec7c \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 vi\u1ec5n th\u00e1m v\u00e0 GIS \u0111ang di\u1ec5n ra r\u1ea5t m\u1ea1nh m\u1ebd trong nghi\u00ean c\u1ee9u t\u00e0i nguy\u00ean v\u00e0 m\u00f4i tr\u01b0\u1eddng, \u0111\u1eb7c bi\u1ec7t x\u00e1c \u0111\u1ecbnh c\u00e1c m\u00f4 h\u00ecnh t\u01b0\u01a1ng quan gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 sinh th\u00e1i v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y r\u1eebng trong b\u1ed1i c\u1ea3nh bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu. Nghi\u00ean c\u1ee9u n\u00e0y x\u00e1c \u0111\u1ecbnh c\u00e1c ch\u1ec9 s\u1ed1 v\u1ec1 di\u1ec7n t\u00edch l\u00e1 c\u00e2y (LAI), ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt chu\u1ea9n h\u00f3a (NDVI), ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt c\u1ea3i thi\u1ec7n (EVI) v\u00e0 gi\u00e1 tr\u1ecb l\u01b0\u1ee3ng m\u01b0a th\u00f4ng qua t\u01b0 li\u1ec7u vi\u1ec5n th\u00e1m khu v\u1ef1c VQG C\u00e1t B\u00e0, th\u00e0nh ph\u1ed1 H\u1ea3i Ph\u00f2ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, gi\u00e1 tr\u1ecb ch\u1ec9 s\u1ed1 NDVI t\u00ecm \u0111\u01b0\u1ee3c dao \u0111\u1ed9ng t\u1eeb -0,84 \u00f7 0,85, gi\u00e1 tr\u1ecb ch\u1ec9 s\u1ed1 LAI dao \u0111\u1ed9ng t\u1eeb -4,70 \u00f7 3,30, gi\u00e1 tr\u1ecb ch\u1ec9 s\u1ed1 EVI dao \u0111\u1ed9ng t\u1eeb -1,27 \u00f7 0,94. K\u1ebft qu\u1ea3 t\u00ednh to\u00e1n l\u01b0\u1ee3ng m\u01b0a d\u1ef1a v\u00e0o t\u01b0 li\u1ec7u vi\u1ec5n th\u00e1m cho th\u1ea5y dao \u0111\u1ed9ng t\u1eeb 1325,8 \u00f7 2057,8mm. Qua vi\u1ec7c x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh t\u01b0\u01a1ng quan trong ph\u1ea7n m\u1ec1m R cho th\u1ea5y, c\u00f3 5 m\u00f4 h\u00ecnh c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00f4 ph\u1ecfng m\u1ed1i quan h\u1ec7 gi\u1eefa LAI v\u1edbi l\u01b0\u1ee3ng m\u01b0a v\u00e0 c\u00e1c ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt kh\u00e1c v\u1edbi h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan R2<\/sup>>0,97 v\u00e0 Pvalue <\/sub><0,0001. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u l\u00e0 c\u01a1 s\u1edf khoa h\u1ecdc ban \u0111\u1ea7u cho vi\u1ec7c nghi\u00ean c\u1ee9u m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 kh\u00ed t\u01b0\u1ee3ng v\u00e0 ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt li\u00ean quan trong khu v\u1ef1c VQG C\u00e1t B\u00e0, th\u00e0nh ph\u1ed1 H\u1ea3i Ph\u00f2ng.<\/p>\n

T\u1eeb kh\u00f3a<\/i><\/b>:<\/i> Ch\u1ec9 s\u1ed1 th\u1ef1c v\u1eadt, l\u1edbp ph\u1ee7, Landsat, t\u01b0\u01a1ng quan, VQG
\nC\u00e1t B\u00e0<\/p>\n

 <\/td>\n<\/tr>\n

Using landsat to determine leaf area index (LAI) and relationships with rainfall in Cat Ba National Park, Hai Phong city during 1996 – 2016<\/strong><\/p>\n

Remote sensing and GIS have been applying intensively and extensively in resources and environmental management, in particular determination of the relationships between the vegetation growth and meteorological factors in a changing climate. Study has identified the values of Leaf Area Index (LAI), Normalised Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI) and rainfallthrough using Landsat data in Cat Ba National Park, Hai Phong city. As a result defined, NDVI values \u200b\u200branged from -0.84 \u00f7 0.85, LAI values from -4.70 \u00f7 3.30 and EVI from -1.27 \u00f7 0.94. In addition, study has estimated the rainfall from 1996 –<\/b> 2016 at a range of 1325.8 \u00f7 2057.8mm. As a result of model construction, 5 defined models have showed that there were strong correlations between LAI and rainfall and other vegetation indices with very high R2<\/sup> coefficient > 0.97and Pvalue<\/sub><0.0001. The research results have provided a scientific base for further study of the relationship between meteorological and vegetation factors using remote sensing data in Cat Ba National Park, Hai Phong city.<\/p>\n

Keywords<\/i><\/b>:<\/i> Cat Ba National Park, correlation, vegetation index, land cover, Landsat<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

V\u1eacN D\u1ee4NG MA TR\u1eacN SWOT V\u00c0 QSPM \u0110\u1ec2 X\u00c2Y D\u1ef0NG <\/strong>V\u00c0 L\u1ef0A CH\u1eccN CHI\u1ebeN L\u01af\u1ee2C PH\u00c1T TRI\u1ec2N <\/strong>C\u00d4NG TY TNHH TMV L\u00c2M NGHI\u1ec6P V\u01af\u1edcN QU\u1ed0C GIA <\/strong>U MINH H\u1ea0 T\u1ec8NH C\u00c0 MAU \u0110\u1ebeN 2025<\/strong><\/p>\n

Nguy\u1ec5n Ph\u01b0\u1edbc Ho\u00e0ng
\nBan QLDA Khu \u0111\u00f4 th\u1ecb \u0110\u00f4ng B\u1eafc – S\u1edf X\u00e2y d\u1ef1ng t\u1ec9nh C\u00e0 Mau<\/i> <\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1ee5c ti\u00eau nghi\u00ean c\u1ee9u t\u1eadp trung ph\u00e2n t\u00edch th\u1ef1c tr\u1ea1ng m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng kinh doanh c\u1ee7a C\u00f4ng ty TNHH MTV L\u00e2m nghi\u1ec7p U Minh H\u1ea1 t\u1ec9nh C\u00e0 Mau v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng ph\u00e1t tri\u1ec3n chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ebfn 2025. Tr\u00ean c\u01a1 s\u1edf \u0111\u00f3, b\u00e0i vi\u1ebft t\u1eadp trung ph\u00e2n t\u00edch m\u00f4i tr\u01b0\u1eddng b\u00ean trong, b\u00ean ngo\u00e0i c\u00f4ng ty t\u00ecm ra nh\u1eefng \u0111i\u1ec3m m\u1ea1nh, \u0111i\u1ec3m y\u1ebfu b\u00ean trong c\u00f4ng ty v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c c\u01a1 h\u1ed9i, th\u00e1ch th\u1ee9c t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng kinh doanh c\u1ee7a c\u00f4ng ty. T\u1eeb c\u00e1c s\u1ed1 li\u1ec7u s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p k\u1ebft h\u1ee3p v\u1edbi k\u1ef9 thu\u1eadt ph\u00e2n t\u00edch \u0111i\u1ec3m m\u1ea1nh, \u0111i\u1ec3m y\u1ebfu, c\u01a1 h\u1ed9i v\u00e0 th\u00e1ch th\u1ee9c (SWOT) \u0111\u1ec3 h\u00ecnh th\u00e0nh c\u00e1c nh\u00f3m chi\u1ebfn l\u01b0\u1ee3c SO, ST, WO, WT. Th\u00f4ng qua ma tr\u1eadn ho\u1ea1ch \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c c\u00f3 th\u1ec3 \u0111\u1ecbnh l\u01b0\u1ee3ng (QSPM) \u0111\u00e3 h\u00ecnh th\u00e0nh nh\u1eefng chi\u1ebfn l\u01b0\u1ee3c c\u1ea7n th\u1ef1c hi\u1ec7n cho C\u00f4ng ty TNHH MTV L\u00e2m nghi\u1ec7p U Minh H\u1ea1 t\u1ec9nh C\u00e0 Mau \u0111\u1ebfn n\u0103m 2025, nh\u1eb1m m\u1ee5c \u0111\u00edch m\u1edf r\u1ed9ng, ph\u00e1t tri\u1ec3n v\u00e0 t\u1ea1o th\u1ebf ch\u1ee7 \u0111\u1ed9ng tr\u00ean th\u1ecb tr\u01b0\u1eddng ng\u00e0y c\u00e0ng c\u1ea1nh tranh kh\u1ed1c li\u1ec7t nh\u01b0 hi\u1ec7n nay.<\/p>\n

T\u1eeb kh\u00f3a<\/i><\/b>: <\/i>Chi\u1ebfn l\u01b0\u1ee3c, C\u00e0 Mau, V\u01b0\u1eddn qu\u1ed1c gia U Minh H\u1ea1<\/p>\n

 <\/td>\n<\/tr>\n

Application matrix SWOT and QSPM for construction and choices strategic development One member limited liability Company forest National Park U Minh Ha Ca Mau province to 2025<\/strong><\/p>\n

The research is focused on analysis situation environmental business activities of the Company Limited U Minh Ha Forest Ca Mau and strategic development orientations to 2025. It first was an analysis of the company\u2019s inside and outside environments in order to find out its strengths (S) and weaknesses (W) and to identify opportunities (O) and threats (T) affecting its business operations. The primary and secondary data together with the analytical method of SWOT were used toform strategic groups SO, ST, WO, and WT. Through the quantitative strategic planning matrix (QSPM), some strategies toward 2025 were formulated for Company Limited U Minh Ha Forest Ca Mau to reach the aims of expansion, development and becoming proactive in the market with increasingly severe competitions.<\/p>\n

Keywords:<\/b> Strategy, Ca Mau, U Minh Ha National Park<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

HI\u1ec6N TR\u1ea0NG R\u1eeaNG NG\u1eacP M\u1eb6N T\u1ea0I QU\u1ea2NG NINH<\/strong><\/p>\n

H\u00e0 Th\u1ecb M\u1eebng, \u0110\u1ed7 Th\u1ecb Kim Nhung
\nVi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/i><\/i><\/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 \u0111\u00e1nh gi\u00e1 th\u1ef1c tr\u1ea1ng c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n \u1edf Qu\u1ea3ng Ninh th\u00f4ng qua \u0111i\u1ec1u tra c\u00e1c \u00f4 ti\u00eau chu\u1ea9n \u0111\u1ea1i di\u1ec7n t\u1ea1i huy\u1ec7n Ti\u00ean Y\u00ean v\u00e0 th\u1ecb x\u00e3 Qu\u1ea3ng Y\u00ean. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra kh\u1ea3o s\u00e1t cho th\u1ea5y: t\u1ec9nh Qu\u1ea3ng Ninh c\u00f3 t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng v\u00e0 \u0111\u1ea5t ng\u1eadp m\u1eb7n l\u00e0 23.260,25ha, trong \u0111\u00f3 c\u00f3 19.820ha r\u1eebng ng\u1eadp m\u1eb7n c\u00f3 tr\u1eef l\u01b0\u1ee3ng. T\u1ea1i \u0111\u00e2y c\u00f3 2 tr\u1ea1ng th\u00e1i th\u1ef1c b\u00ec ch\u1ee7 y\u1ebfu: (i) R\u1eebng t\u1ef1 nhi\u00ean, ph\u00e2n b\u1ed1 \u1edf nh\u1eefng n\u01a1i ng\u1eadp tri\u1ec1u trung b\u00ecnh, th\u1ec3 n\u1ec1n s\u00e9t c\u1ee9ng, \u0111\u1ed9 l\u00fan 10cm, c\u1ea5u tr\u00fac t\u1ed5 th\u00e0nh t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n, c\u00e1c lo\u00e0i c\u00e2y ch\u1ee7 y\u1ebfu bao g\u1ed3m \u0110\u01b0\u1edbc v\u00f2i (Rhizophora stylosa<\/i>), V\u1eb9t d\u00f9 (Bruguiera selangular<\/i>), M\u1ea5m bi\u1ec3n (Avicennia marina)<\/i>. R\u1eebng t\u1ef1 nhi\u00ean \u0111ang b\u1ecb suy gi\u1ea3m do r\u1eebng t\u00e1i sinh tr\u00ean c\u00e1c \u0111\u1ea7m b\u1ecf hoang, n\u1ea1o v\u00e9t \u0111\u1eafp b\u1edd d\u1eabn \u0111\u1ebfn h\u1ec7 th\u1ed1ng l\u01b0u th\u00f4ng d\u00f2ng ch\u1ea3y c\u1ee7a th\u1ee7y tri\u1ec1u kh\u00f4ng \u1ed5n \u0111\u1ecbnh. ii) \u0110\u1ed1i v\u1edbi r\u1eebng tr\u1ed3ng, m\u1ee9c \u0111\u1ed9 suy gi\u1ea3m th\u1ea5p h\u01a1n ch\u1ee7 y\u1ebfu do \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba b\u1ecb thay \u0111\u1ed5i, n\u1ec1n \u0111\u1ea5t b\u1ecb b\u1ed3i l\u1eafng cao, lo\u00e0i c\u00e2y ch\u1ee7 y\u1ebfu g\u1ed3m: \u0110\u01b0\u1edbc V\u00f2i, V\u1eb9t d\u00f9, ph\u00e2n b\u1ed1 tr\u00ean c\u00e1c l\u1eadp \u0111\u1ecba s\u00e9t ch\u1eb7t, \u0111\u1ed9 l\u00fan 5 – 10cm. M\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p ph\u1ee5c h\u1ed3i r\u1eebng ng\u1eadp m\u1eb7n nh\u01b0: Tr\u1ed3ng b\u1ed5 sung c\u00e1c lo\u00e0i c\u00e2y ph\u00f9 v\u1edbi \u0111i\u1ec1u ki\u1ec7n sinh th\u00e1i v\u00e0 l\u1eadp \u0111\u1ecba \u0111\u1ec3 t\u1ea1o th\u00e0nh r\u1eebng c\u00f3 nhi\u1ec1u t\u1ea7ng t\u00e1n; C\u00f3 ch\u00ednh s\u00e1ch ph\u00f9 h\u1ee3p, thu h\u00fat v\u1edbi ng\u01b0\u1eddi d\u00e2n \u0111\u1ecba ph\u01b0\u01a1ng v\u1ec1 vi\u1ec7c qu\u1ea3n l\u00fd, b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng ng\u1eadp m\u1eb7n.<\/p>\n

T\u1eeb kh\u00f3a<\/b>: R\u1eebng ng\u1eadp m\u1eb7n, r\u1eebng t\u1ef1 nhi\u00ean, r\u1eebng tr\u1ed3ng,
\nQu\u1ea3ng Ninh<\/p>\n

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Current status of mangrove forests in Quang Ninh<\/strong><\/p>\n

This study was conducted to assess the status of mangrove forests in Quang Ninh Province through surveys of representative standard plots in Tien Yen and Quang Yen districts. The results show that Quang Ninh province has a total area of \u200b\u200b23.260,25ha of mangrove forest and land, of which 19.820ha of mangrove forests have reserves. There are two main vegetation states: (i) For natural forests, distributed in medium tidal areas with hard clay soil media, subsidence of 10cm, the forest structure is relatively simple, the main species include Rhizophora stylosa, Bruguiera selangular, Avicennia marina.<\/i> Natural forest is degrading due to regenerated forest infallowmarshes, dredging operation lead to the unstable flow circulation system of tides. (ii) For planted forests, the degree of degradation is low, mainly due to altered site conditions and high sedimentation. The main species are Rhizophora stylosa, Bruguiera selangular <\/i>distributed on tight clay sites, subsidence of 5 – 10cm. Some measures for mangrove rehabilitation such as: plant supplementary species suitable with ecological and site conditions to form forests with many canopy layers; Develop appropriate policies and attract local people on management, protection and development of mangrove forests.<\/p>\n

Keywords<\/i><\/b>:<\/i> Mangrove forest, natural forest, planted forest,
\nQuang Ninh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1ed8 B\u1ec0N KH\u00c1NG N\u1ea4M M\u1ee4C TR\u1eaeNG C\u1ee6A G\u1ed6 GI\u1ed4I FORD –<\/strong>
\n S\u1ef0 PH\u00c1 HU\u1ef6 C\u1ea4U TR\u00daC G\u1ed6 B\u1edeI C\u00c1C LO\u1ea0I N\u1ea4M M\u1ee4C TR\u1eaeNG<\/strong><\/p>\n

Ho\u00e0ng Trung Hi\u1ebfu1<\/sup>, Nguy\u1ec5n \u0110\u1ee9c Th\u00e0nh1<\/sup>, Nguy\u1ec5n T\u1eed Kim1<\/sup>, Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc2
\n<\/sup>1<\/sup><\/i> Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/i><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

\u0110\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean c\u1ee7a g\u1ed7 l\u00e0 m\u1ed9t trong nh\u1eefng ti\u00eau ch\u00ed quan tr\u1ecdng trong vi\u1ec7c \u0111\u1ecbnh h\u01b0\u1edbng m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng g\u1ed7. D\u1ed5i ford l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao, g\u1ed7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i t\u1ea1i Vi\u1ec7t Nam. Tuy nhi\u00ean, ch\u01b0a c\u00f3 nghi\u00ean c\u1ee9u n\u00e0o v\u1ec1 \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean c\u1ee7a g\u1ed7, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi n\u1ea5m m\u1ee5c h\u1ea1i g\u1ed7. B\u00e0i b\u00e1o tr\u00ecnh b\u00e0y kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu c\u1ee7a g\u1ed7 D\u1ed5i ford v\u1edbi 6 lo\u1ea1i n\u1ea5m m\u1ee5c tr\u1eafng h\u1ea1i g\u1ed7. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y g\u1ed7 D\u1ed5i ford c\u00f3 \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean \u1edf m\u1ee9c k\u00e9m b\u1ec1n. T\u1ed5n hao kh\u1ed1i l\u01b0\u1ee3ng g\u1ed7 D\u1ed5i ford sau 2 th\u00e1ng kh\u1ea3o nghi\u1ec7m dao \u0111\u1ed9ng t\u1eeb 11,18% \u0111\u1ebfn 27,48%. G\u1ed7 b\u1ecb ph\u00e1 hu\u1ef7 nhi\u1ec1u b\u1edfi lo\u00e0i n\u1ea5m Phanerochaete sordida<\/i> (27,48%) v\u00e0 \u00edt b\u1ecb ph\u00e1 hu\u1ef7 nh\u1ea5t b\u1edfi n\u1ea5m Dichomitus squalens <\/i>(11,18%). Nghi\u00ean c\u1ee9u c\u1ea5u t\u1ea1o hi\u1ec3n vi cho th\u1ea5y, s\u1ee3i n\u1ea5m ph\u00e1t tri\u1ec3n v\u00e0 ph\u00e2n b\u1ed1 to\u00e0n b\u1ed9 c\u1ea5u tr\u00fac b\u00ean trong g\u1ed7. Lo\u00e0i n\u1ea5m m\u1ee5c tr\u1eafng P. sordida<\/i>th\u1ec3 hi\u1ec7n r\u00f5 ph\u00e1 hu\u1ef7 c\u1ea3 lignin, xenlulo v\u00e0 hemixenlulo.<\/p>\n

T\u1eeb kho\u00e1: D\u1ed5i ford, \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean, n\u1ea5m m\u1ee5c tr\u1eafng, k\u00ednh hi\u1ec3n vi quang h\u1ecdc, k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed qu\u00e9t<\/p>\n

 <\/td>\n<\/tr>\n

Natural resistance of Manglietia fordiana<\/i> Oliv. to white-rot fungi the wood structure deterioration by different white-rot fungus<\/strong><\/p>\n

Natural durability is the most important quality of wood in use. Manglietia fordiana <\/i>Oliv. is an indigenous species of high commercial value. Its wood is used as construction material for housing and fine indoor furniture manufacturing in Vietnam. However, there is few information on M. fordiana <\/i>wood resistance to fungi. In this study, natural resistance of M. fordiana<\/i> wood against six white-rot fungi was investigated. The results showed that M. fordiana<\/i> has weak natural durability. The weight loss was from 11.18% to 27.48% after 2 months of exposure. The highest value was caused by Phanerochaete sordida <\/i>(27.48%) while the least deterioration level was decayed by Dichomitus squalens <\/i>(11.18%). Microscopic investigation showed the hyphae were extended over whole wood tissues. It also revealed that P. sordida <\/i>destroyed lignin, cellulose and hemicellulose.<\/p>\n

Keywords: Manglietia fordiana <\/i>Oliv., Natural durability, Optical microscope, Scanning electron microscope, White-rot fungi<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/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 3 – 2017 \u00a0 1 \u0110a d\u1ea1ng lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u t\u1ea1i Khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean N\u00e0 H\u1ea9u t\u1ec9nh Y\u00ean B\u00e1i H\u1ed3 Ng\u1ecdc S\u01a1n Nguy\u1ec5n Th\u1ecb Thu Hi\u1ec1n Nguy\u1ec5n V\u0103n Huy Biodiversity survey of medicinal plants in Na Hau nature reserve, Yen Bai province 5 2 \u1ea2nh […]<\/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\/1573"}],"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=1573"}],"version-history":[{"count":6,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1573\/revisions"}],"predecessor-version":[{"id":1693,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1573\/revisions\/1693"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}