{"id":1566,"date":"2017-08-29T14:06:56","date_gmt":"2017-08-29T07:06:56","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1566"},"modified":"2023-11-23T12:25:30","modified_gmt":"2023-11-23T05:25:30","slug":"vietnam-journal-of-forest-science-number-2-2017","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2017\/08\/vietnam-journal-of-forest-science-number-2-2017\/","title":{"rendered":"Vietnam Journal of Forest Science Number 2-2017"},"content":{"rendered":"

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

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 2 – 2017<\/b><\/p>\n

\u00a0<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00a01.<\/td>\n\n

Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh\u00a0 c\u00e2y \u01af\u01a1i (Scaphium macropodum<\/i> (Miq))\u00a0 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p chi\u1ebft c\u00e0nh<\/p>\n<\/td>\n

\n

\u0110o\u00e0n \u0110\u00ecnh Tam
\nL\u00ea Qu\u1ed1c Huy
\nV\u0169 Qu\u00fd \u0110\u00f4ng<\/p>\n<\/td>\n

\n

Research on clonal propagation of Scaphium macropodum<\/i> (Miq) using marcotting method<\/p>\n<\/td>\n

\n

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

2.<\/td>\n\n

Ki\u1ec3m nghi\u1ec7m ph\u1ea9m ch\u1ea5t gieo \u01b0\u01a1m\u00a0 h\u1ea1t Nghi\u1ebfn (Burretiodendron hsienmu<\/i> Chun et How)\u00a0 v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u00e1nh s\u00e1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u00e2y con<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc<\/p>\n<\/td>\n

\n

Quality testing germination pelletizing of Nghien (Burretiodendron hsienmu<\/i> Chun et How) and the effect of light intensity to survival rate and growth of knema pierrei warb<\/p>\n<\/td>\n

\n

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

3.<\/td>\n\n

Ph\u00e2n lo\u1ea1i th\u1ea3m th\u1ef1c v\u1eadt\u00a0 r\u1eebng V\u01b0\u1eddn Qu\u1ed1c gia Bidoup – N\u00fai B\u00e0, t\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/p>\n<\/td>\n

\n

Tr\u1ea7n Th\u1ecb Thanh H\u01b0\u01a1ng
\nNguy\u1ec5n \u0110\u0103ng H\u1ed9i
\nKuznetsov A.N
\n\u0110\u1eb7ng H\u00f9ng C\u01b0\u1eddng<\/p>\n<\/td>\n

\n

Classification of forests in Bidoup – Nuiba National Park, Lamdong province<\/p>\n<\/td>\n

\n

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

4.<\/td>\n\n

\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac l\u00e2m ph\u1ea7n c\u00f3 D\u1ebb xanh ph\u00e2n b\u1ed1 v\u00e0 t\u00e1i sinh lo\u00e0i D\u1ebb xanh (Lithocarpus pseudosundaicus<\/i> (Hickel et A. camus<\/i>) Camus) t\u1ea1i m\u1ed9t s\u1ed1 t\u1ec9nh mi\u1ec1n n\u00fai ph\u00eda B\u1eafc<\/p>\n<\/td>\n

\n

B\u00f9i Tr\u1ecdng Th\u1ee7y
\nL\u01b0\u01a1ng Th\u1ebf D\u0169ng
\nL\u00ea V\u0103n Quang<\/p>\n<\/td>\n

\n

Characterictic of stand structure and regeneration of Lithocarpus pseudosundaicus<\/i> (Hickel et A.camus)<\/i> Camus in some Northern Moutainous provinces<\/p>\n<\/td>\n

\n

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

5.<\/td>\n\n

Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 t\u00e1i sinh r\u1eebng t\u1ef1 nhi\u00ean n\u01a1i c\u00f3 lo\u00e0i Nghi\u1ebfn (Burretiodendron hsienmu<\/i> Chun et How) ph\u00e2n b\u1ed1 t\u1ea1i \u0110i\u1ec7n Bi\u00ean v\u00e0 S\u01a1n La<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc<\/p>\n<\/td>\n

\n

Structural characteristics of natural forest place that Nghien (Burretiodendron hsienmu<\/i> Chun et How) distribution in Dien Bien and Son La<\/p>\n<\/td>\n

\n

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

6.<\/td>\n\n

Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac h\u00ecnh th\u00e1i v\u00e0 ph\u00e2n b\u1ed1 c\u1ee7a lo\u00e0i V\u1ea7u \u0111\u1eafng (Indosasa angustata<\/i>\u00a0MC.Clure)\u00a0 \u1edf huy\u1ec7n Na R\u00ec – t\u1ec9nh B\u1eafc K\u1ea1n<\/p>\n<\/td>\n

\n

Ng\u00f4 Xu\u00e2n H\u1ea3i
\nTr\u1ea7n C\u00f4ng Qu\u00e2n<\/p>\n<\/td>\n

\n

Research on morphological characteristics and distribution of Indosasa<\/i> sinica<\/i> C.D. Chu & C.S in Nari District, Bac Kan province<\/p>\n<\/td>\n

\n

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

7.<\/td>\n\n

\u0110\u00e1nh gi\u00e1 sinh tr\u01b0\u1edfng m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba trong m\u00f4 h\u00ecnh tr\u1ed3ng v\u00e0 l\u00e0m gi\u00e0u r\u1eebng \u1edf v\u00f9ng cao\u00a0 m\u1ed9t s\u1ed1 t\u1ec9nh mi\u1ec1n n\u00fai ph\u00eda B\u1eafc<\/p>\n<\/td>\n

\n

B\u00f9i Tr\u1ecdng Th\u1ee7y
\nHo\u00e0ng Xu\u00e2n Di\u1ec7u
\nPh\u1ea1m Minh To\u1ea1i<\/p>\n<\/td>\n

\n

Growth assessment of native species in planting and enrichment models in high areas of northern mountainous provinces<\/p>\n<\/td>\n

\n

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

8.<\/td>\n\n

\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac\u00a0 c\u1ee7a m\u1ed9t s\u1ed1 tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i\u00a0 t\u1ea1i X\u0103m Kh\u00f2e, Mai Ch\u00e2u, H\u00f2a B\u00ecnh<\/p>\n<\/td>\n

\n

Ho\u00e0ng V\u0103n Th\u1eafng
\nC\u00f9 Th\u1ecb L\u1ed9c
\nPh\u00f9ng \u0110\u00ecnh Trung
\nHo\u00e0ng V\u0103n Th\u00e0nh<\/p>\n<\/td>\n

\n

Structural characteristics of natural forest types in Xam Khoe, Mai Chau, Hoa Binh province<\/p>\n<\/td>\n

\n

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

9.<\/td>\n\n

X\u00e1c \u0111\u1ecbnh m\u1ee9c th\u00edch nghi c\u1ee7a l\u00e0m gi\u00e0u r\u1eebng kh\u1ed9p b\u1eb1ng c\u00e2y T\u1ebfch (Tectona grandis<\/i> L.F.) Theo c\u00e1c nh\u00e2n t\u1ed1 quan tr\u1eafc tr\u1ef1c ti\u1ebfp v\u00e0 th\u1ef1c v\u1eadt ch\u1ec9 th\u1ecb<\/p>\n<\/td>\n

\n

Ph\u1ea1m C\u00f4ng Tr\u00ed
\nB\u1ea3o Huy<\/p>\n<\/td>\n

\n

Determination of suitability level of enrichment planting of teak (Tectona grandis<\/i> L.F.) in the degraded dry deciduous dipterocarp forest by direct observed factors and indicator plants<\/p>\n<\/td>\n

\n

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

\u00a010.<\/td>\n\n

Quan h\u1ec7 gi\u1eefa \u0111\u1eb7c \u0111i\u1ec3m l\u01b0u v\u1ef1c v\u1edbi ch\u1ebf \u0111\u1ed9 d\u00f2ng ch\u1ea3y c\u1ee7a m\u1ed9t s\u1ed1 l\u01b0u v\u1ef1c \u0111i\u1ec3n h\u00ecnh \u1edf Vi\u1ec7t Nam<\/p>\n<\/td>\n

\n

Tr\u1ea7n Quang B\u1ea3o
\nNguy\u1ec5n V\u0103n \u0110o\u00e0n<\/p>\n<\/td>\n

\n

Relationship between watershed characteristics and flow rate of typical watersheds in Vietnam<\/p>\n<\/td>\n

\n

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

\u00a011.<\/td>\n\n

S\u1eed d\u1ee5ng \u1ea3nh Landsat \u0111a th\u1eddi gian\u00a0 \u0111\u00e1nh gi\u00e1 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng\u00a0 d\u01b0\u1edbi \u1ea3nh h\u01b0\u1edfng c\u1ee7a x\u00e2y d\u1ef1ng \u0111\u1eadp th\u1ee7y \u0111i\u1ec7n Tuy\u00ean Quang,\u00a0 t\u1ec9nh Tuy\u00ean Quang giai \u0111o\u1ea1n 2000 – 2016<\/p>\n<\/td>\n

\n

\u0110\u1ed7 Th\u1ecb Ho\u00e0i Thu
\nNguy\u1ec5n H\u1ea3i H\u00f2a<\/p>\n<\/td>\n

\n

Using multi-temporal landsat data to monitor forest cover changes under construction of Tuyen Quang hydropower dam, Tuyen Quang province during 2000 – 2016<\/p>\n<\/td>\n

\n

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

\u00a012.<\/td>\n\n

\u1ee8ng d\u1ee5ng GIS v\u00e0 vi\u1ec5n th\u00e1m\u00a0 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 ph\u00e2n v\u00f9ng th\u00edch nghi\u00a0 lo\u00e0i s\u00e2u r\u00f3m Th\u00f4ng (Dendrolimus punctatus<\/i>) t\u1ea1i huy\u1ec7n T\u0129nh Gia, Thanh H\u00f3a<\/p>\n<\/td>\n

\n

Nguy\u1ec5n H\u1ea3i H\u00f2a
\nPh\u1ea1m Vi\u1ec7t B\u1eafc<\/p>\n<\/td>\n

\n

Application of gis and remote sensing to regionalise the pinus caterpillar (Dendrolimus punctatus<\/i>) in Tinh Gia district, Thanh Hoa province<\/p>\n<\/td>\n

\n

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

\u00a013.<\/td>\n\n

C\u00e1c nh\u00e2n t\u1ed1 \u1ea3nh h\u01b0\u1edfng v\u00e0 gi\u1ea3i ph\u00e1p ho\u00e0n thi\u1ec7n m\u00f4 h\u00ecnh li\u00ean k\u1ebft theo nh\u00f3m h\u1ed9 tr\u1ed3ng r\u1eebng\u00a0 t\u1ea1i Vi\u1ec7t Nam<\/p>\n<\/td>\n

\n

Ho\u00e0ng Li\u00ean S\u01a1n
\nPh\u1ea1m Th\u1ecb Luy\u1ec7n
\nNguy\u1ec5n Gia Ki\u00eam<\/p>\n<\/td>\n

\n

Affecting factors and solutions to complete the partnership model of the household groups in tree planting of Vietnam<\/p>\n<\/td>\n

\n

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

\u00a014.<\/td>\n\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u thi\u1ebft k\u1ebf, ch\u1ebf t\u1ea1o thi\u1ebft b\u1ecb ch\u01b0ng c\u1ea5t tinh d\u1ea7u h\u1ed3i t\u1eeb c\u00e0nh l\u00e1<\/p>\n<\/td>\n

\n

V\u0169 Th\u1ecb Ho\u00e0ng Ph\u01b0\u01a1ng
\nNguy\u1ec5n V\u0103n D\u01b0\u1ee1ng<\/p>\n<\/td>\n

\n

An attemp in design and assembly of star anise distillation equipment<\/p>\n<\/td>\n

\n

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

 <\/p>\n

NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG V\u00d4 T\u00cdNH C\u00c2Y \u01af\u01a0I (Scaphium<\/i> macropodum<\/i> <\/i>(Miq)) B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P CHI\u1ebeT C\u00c0NH<\/p>\n

\u0110o\u00e0n \u0110\u00ecnh Tam, L\u00ea Qu\u1ed1c Huy, V\u0169 Qu\u00fd \u0110\u00f4ng<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 m\u00f4i tr\u01b0\u1eddng r\u1eebng <\/b><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh c\u00e2y \u01af\u01a1i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p chi\u1ebft c\u00e0nh s\u1ebd gi\u00fap ch\u1ee7 \u0111\u1ed9ng ngu\u1ed3n gi\u1ed1ng v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y khi s\u1eed d\u1ee5ng ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5 v\u1edbi n\u1ed3ng \u0111\u1ed9 1.000ppm cho t\u1ef7 l\u1ec7 ra r\u1ec5 t\u1ed1t nh\u1ea5t (59%), ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 r\u1ec5 c\u0169ng t\u1ed1t nh\u1ea5t (4 r\u1ec5\/c\u00e2y v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 trung b\u00ecnh \u0111\u1ea1t 14cm); C\u00f4ng th\u1ee9c cho t\u1ef7 l\u1ec7 ra r\u1ec5 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 r\u1ec5 th\u1ea5p nh\u1ea5t l\u00e0 250ppm khi ch\u1ec9 \u0111\u1ea1t 11,2% s\u1ed1 c\u00e2y ra r\u1ec5, trung b\u00ecnh 2 r\u1ec5\/c\u00e2y v\u1edbi chi\u1ec1u d\u00e0i trung b\u00ecnh 6cm. Kh\u00f4ng s\u1eed d\u1ee5ng ch\u1ea5t k\u00edch th\u00edch, c\u00e0nh chi\u1ebft kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ra r\u1ec5. C\u00e2y chi\u1ebft \u1edf v\u01b0\u1eddn \u01b0\u01a1m t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh 0,06 cm\/th\u00e1ng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao \u0111\u1ea1t 5,5 cm\/th\u00e1ng. Sau 12 th\u00e1ng hu\u1ea5n luy\u1ec7n, ch\u0103m s\u00f3c t\u1ea1i v\u01b0\u1eddn \u01b0\u01a1m khi c\u00e2y c\u00f3 chi\u1ec1u cao tr\u00ean 60cm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 0,6cm tr\u1edf l\u00ean, th\u00e2n \u0111\u00e3 h\u00f3a g\u1ed7 th\u00ec c\u00f3 th\u1ec3 mang \u0111i tr\u1ed3ng r\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>\u01af\u01a1i, nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh, chi\u1ebft c\u00e0nh<\/td>\n<\/tr>\n

\n

Research on clonal propagation of Scaphium macropodum<\/i> (Miq) using marcotting method<\/strong><\/p>\n

Research on clonal propagation of Scaphium macropodum<\/i> using marcotting method helps to actively provide breeds and improve plantation quality. Research results showed that using rooting stimulant of 1,000ppm concentration resulted the best rooting ratio of 59% and the best rooting quality of 4 roots\/tree and average root length of 14cm. Using rooting stimulant of 250 ppm resulted the worse rooting ratio of 11.2%, 2 roots\/tree and average root length of 6cm. Whithout using rooting stimulant, cuttings are inability rooted. In nursery, marcotted trees have average diameter and heigh increment of 0.06 cm\/month and 5.5 cm\/month respectively. After taking care for 12 months in the nursery, marcotted trees can be planted when they reached 60cm in height and 0.6cm in diameter and their stems turn to wood.<\/p>\n

Keywords:<\/i><\/b> Scaphium macropodum<\/i>, clonal propagation, marcotting<\/p>\n

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

KI\u1ec2M NGHI\u1ec6M PH\u1ea8M CH\u1ea4T GIEO \u01af\u01a0M H\u1ea0T NGHI\u00caN (Burretiodendron hsienmu <\/i>Chun et How) V\u00c0 \u1ea2NH H\u01af\u1edeNG C\u1ee6A \u00c1NH S\u00c1NG \u0110\u1ebeN SINH TR\u01af\u1edeNG C\u00c2Y CON<\/p>\n

Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y B\u1eafc<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTNghi\u1ebfn (Burretiodendron hsienmu <\/i>Chun et How) l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. Tuy nhi\u00ean, hi\u1ec7n nay ngu\u1ed3n c\u00e2y m\u1eb9 c\u00f3 kh\u1ea3 n\u0103ng gieo gi\u1ed1ng trong t\u1ef1 nhi\u00ean \u0111\u00e3 t\u01b0\u01a1ng \u0111\u1ed1i khan hi\u1ebfm n\u00ean c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 nh\u00e2n gi\u1ed1ng l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft nh\u1eb1m g\u00f3p ph\u1ea7n ph\u1ee5c v\u1ee5 c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n, g\u00e2y tr\u1ed3ng v\u00e0 ph\u00e1t tri\u1ec3n lo\u00e0i. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ph\u1ea9m ch\u1ea5t gieo \u01b0\u01a1m h\u1ea1t Nghi\u1ebfn v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u00e1nh s\u00e1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u00e2y Nghi\u1ebfn trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m tr\u00ean 04 l\u00f4 h\u1ea1t thu h\u00e1i t\u1eeb c\u00e1c c\u00e2y m\u1eb9 ph\u00e2n b\u1ed1 t\u1ea1i hai t\u1ec9nh S\u01a1n La, \u0110i\u1ec7n Bi\u00ean cho th\u1ea5y: \u0110\u1ed9 thu\u1ea7n l\u00f4 h\u1ea1t dao \u0111\u1ed9ng t\u1eeb 82,00 – 93,93%, tr\u1ecdng l\u01b0\u1ee3ng 1000 h\u1ea1t thu\u1ea7n dao \u0111\u1ed9ng t\u1eeb 198,5g – 208,6g, s\u1ed1 h\u1ea1t trong 1kg dao \u0111\u1ed9ng t\u1eeb 4795 – 5037 h\u1ea1t v\u00e0 b\u00ecnh qu\u00e2n chung l\u00e0 4943 h\u1ea1t; T\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m dao \u0111\u1ed9ng t\u1eeb 70 – 81% v\u00e0 trung b\u00ecnh l\u00e0 75,5%, th\u1eddi gian \u0111\u1ec3 h\u1ea1t n\u1ee9t nanh dao \u0111\u00f4\u0323ng t\u01b0\u0300 12,4 – 13,44 nga\u0300y; nhi\u1ec7t \u0111\u1ed9 t\u1ed1t nh\u1ea5t \u0111\u1ec3 x\u1eed l\u00fd h\u1ea1t n\u00ean l\u00e0 2 s\u00f4i 3 l\u1ea1nh, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u00e0 83,33%; C\u01b0\u1eddng \u0111\u1ed9 che s\u00e1ng th\u00edch h\u1ee3p nh\u1ea5t l\u00e0 50%, sau 12 th\u00e1ng th\u00ed nghi\u1ec7m, t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u00e0 79,17%, chi\u1ec1u cao trung b\u00ecnh c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u00e0 45,13cm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c trung b\u00ecnh l\u00e0 4,13mm.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>C\u01b0\u1eddng \u0111\u1ed9 che s\u00e1ng, ki\u1ec3m nghi\u1ec7m ph\u1ea9m ch\u1ea5t, Nghi\u1ebfn, t\u1ef7 l\u1ec7 s\u1ed1ng, sinh tr\u01b0\u1edfng<\/p>\n

 <\/td>\n<\/tr>\n

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Quality testing germination pelletizing of Nghien (Burretiodendron hsienmu<\/i> Chun et How) and the effect of light intensity to survival rate and growth of knema pierrei warb<\/strong><\/p>\n

Nghien (Burretiodendron hsienmu <\/i>Chun et How) is a species of indigenous tree of high economic value. However, currently the source of seedlings that are capable of sowing in the wild is relatively scarce so research in breeding is essential to contribute to the conservation, plantation and species development. The results of the study on the quality of grafting and the effect of light on the growth of durian at nursery stage on 04 seedlings collected from mother trees distributed in two provinces of Son La and Dien Bien showed that: Net weight varies from 82.00% to 93.93%, net weight 1000 seeds ranges from 27,210 – 30,010g, the average number of seeds per kilogram can be rounded from about 33,000 seeds to 37,000 seeds and the overall average is 34,000 seeds – 35,000 seeds; The germination rate ranges from 70 – 81% and the average is 75.5%, the time to crack can be from 12.4 to 13.44 days; The best temperature for seed treatment should be 2 boiling 3 cold; the rate of germination can be attained 83.33%; The most appropriate shade intensity was 50%. After 12 months of experiment, the average survival rate was 79.17%, average height was 45.13cm and average diameter average is 4.13mm.<\/p>\n

Keywords:<\/i><\/b> Burretiodendron hsienmu <\/i>Chun et How, growth, light shading, seed quality testing, survival rate<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PH\u00c2N LO\u1ea0I TH\u1ea2M TH\u1ef0C V\u1eacT R\u1eeaNG V\u01af\u1edcN QU\u1ed0C GIA BIDOUP – N\u00daI B\u00c0, T\u1ec8NH L\u00c2M \u0110\u1ed2NG<\/p>\n

Tr\u1ea7n Th\u1ecb Thanh H\u01b0\u01a1ng, Nguy\u1ec5n \u0110\u0103ng H\u1ed9i, Kuznetsov A.N, \u0110\u1eb7ng H\u00f9ng C\u01b0\u1eddng<\/p>\n

Trung t\u00e2m Nhi\u1ec7t \u0111\u1edbi Vi\u1ec7t – Nga<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTH\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng V\u01b0\u1eddn Qu\u1ed1c gia (VQG) Bidoup – N\u00fai B\u00e0 \u0111\u00e3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u01b0a th\u1ec3 hi\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 \u0111\u1eb7c \u0111i\u1ec3m th\u1ea3m th\u1ef1c v\u1eadt c\u1ee7a V\u01b0\u1eddn. Nhi\u1ec1u b\u00e1o c\u00e1o, c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u ch\u01b0a th\u1ed1ng nh\u1ea5t, r\u00f5 r\u00e0ng v\u1ec1 t\u00ean g\u1ecdi v\u1edbi c\u00f9ng m\u1ed9t ki\u1ec3u r\u1eebng. Do v\u1eady, b\u00e0i b\u00e1o t\u1eadp trung x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i, b\u1ea3n \u0111\u1ed3 v\u00e0 m\u00f4 t\u1ea3 \u0111\u1eb7c \u0111i\u1ec3m th\u1ea3m th\u1ef1c v\u1eadt V\u01b0\u1eddn Qu\u1ed1c gia Bidoup – N\u00fai B\u00e0. D\u1ef1a tr\u00ean quan \u0111i\u1ec3m sinh th\u00e1i ph\u00e1t sinh qu\u1ea7n th\u1ec3 th\u1ef1c v\u1eadt c\u1ee7a Th\u00e1i V\u0103n Tr\u1eebng (1999) v\u00e0 s\u1ef1 ph\u00e2n h\u00f3a \u0111\u1ecba h\u00ecnh VQG Bidoup – N\u00fai B\u00e0 (Nguy\u1ec5n \u0110\u0103ng H\u1ed9i, 2009), b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p k\u1ebf th\u1eeba, ph\u01b0\u01a1ng ph\u00e1p b\u1ea3n \u0111\u1ed3 v\u00e0 m\u00f4 t\u1ea3 th\u1ea3m th\u1ef1c v\u1eadt, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, Bidoup – N\u00fai B\u00e0 c\u00f3 th\u1ea3m th\u1ef1c v\u1eadt da d\u1ea1ng v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 ph\u00e2n b\u1ed1 kh\u00f4ng gian, v\u1edbi 7 ki\u1ec3u th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng ch\u00ednh g\u1ed3m: (1) Ki\u1ec3u r\u1eebng k\u00edn th\u01b0\u1eddng xanh m\u01b0a \u1ea9m \u00e1 nhi\u1ec7t \u0111\u1edbi n\u00fai th\u1ea5p, trung b\u00ecnh; (2) Ki\u1ec3u r\u1eebng k\u00edn th\u01b0\u1eddng xanh m\u01b0a \u1ea9m \u00e1 nhi\u1ec7t \u0111\u1edbi n\u00fai cao, \u00f4n \u0111\u1edbi \u1ea5m n\u00fai th\u1ea5p; (3) Ki\u1ec3u r\u1eebng k\u00edn th\u01b0\u1eddng xanh h\u1ed7n giao l\u00e1 r\u1ed9ng, l\u00e1 kim \u1ea9m \u00e1 nhi\u1ec7t \u0111\u1edbi n\u00fai th\u1ea5p, trung b\u00ecnh; (4) Ki\u1ec3u r\u1eebng k\u00edn th\u01b0\u1eddng xanh h\u1ed7n giao l\u00e1 r\u1ed9ng, l\u00e1 kim \u1ea9m \u00e1 nhi\u1ec7t \u0111\u1edbi n\u00fai cao, \u00f4n \u0111\u1edbi \u1ea5m n\u00fai th\u1ea5p; (5) R\u1eebng th\u01b0a c\u00e2y l\u00e1 kim h\u01a1i kh\u00f4 \u00e1 nhi\u1ec7t \u0111\u1edbi n\u00fai th\u1ea5p, trung b\u00ecnh; (6) R\u1eebng tre n\u1ee9a h\u1ed7n giao c\u00e2y l\u00e1 r\u1ed9ng, tre n\u1ee9a thu\u1ea7n lo\u00e0i v\u00e0 (7) R\u1eebng tr\u1ed3ng. Trong \u0111\u00f3, c\u00e1c ki\u1ec3u r\u1eebng k\u00edn th\u01b0\u1eddng xanh h\u1ed7n giao l\u00e1 r\u1ed9ng, l\u00e1 kim \u1ea9m \u00e1 nhi\u1ec7t \u0111\u1edbi; ki\u1ec3u ph\u1ee5 r\u1eebng r\u00eau, ki\u1ec3u ph\u1ee5 r\u1eebng l\u00f9n \u1edf \u0111\u1ed9 cao h\u01a1n 1.700m l\u00e0 nh\u1eefng \u0111\u1eb7c tr\u01b0ng cho th\u1ea3m th\u1ef1c v\u1eadt v\u00f9ng n\u00fai Bidoup m\u00e0 hi\u1ebfm n\u01a1i n\u00e0o c\u00f3 \u0111\u01b0\u1ee3c.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>Bidoup – N\u00fai B\u00e0, \u00e1 nhi\u1ec7t \u0111\u1edbi, k\u00edn th\u01b0\u1eddng xanh, th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng<\/p>\n

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Classification of forests in Bidoup – Nuiba National Park, Lamdong province<\/strong><\/p>\n

Forests in Bidoup – Nuiba Bational Park have been classified by using several classification systems which dit not characterize all forest types of the park. The article focused on developing a classification system, with mapping and description of forest types of Bidoup – Nuiba National Park. Based on the ecological view of plant population of Thai Van Trung (1999) and topography of Bidoup – Nuiba National Park (Nguyen Dang Hoi, 2009), by inheritance the current forest status maps, using satellite image interpretation, field survey and inventory methods to identify the forest type, the study results showed that the Bidoup – Nuiba forests are diverse in structure characteristics and spatial distribution, with 7 main forest types, include: (1) Forest type of closed evergreen moisture subtropical low, medium mountain; (2) Forest type of closed evergreen moisture subtropical high mountain and warm temperate low mountain; (3) Evergreen mixed broad, needle leaf moisture subtropical low, medium mountain forest type; (4) Evergreen mixed broad, needle leaf moisture subtropical high mountain and warm temperate low mountain forest type; (5) Sparse needle – leave rather dry subtropical low, medium mountain forest type; (6) Bamboo forest mixed species of broadleaf trees, pure bamboo forest type and (7) Plantation forest. In particular, the evergreen mixed broad, needle leaf moisture subtropical low, medium mountain forest type, mossy forest subtype and dwarf – forest subtype at altitudes above 1,700 meters are characteristics of Bidoup mountain vegetation that are rarely found.<\/p>\n

Keywords:<\/i><\/b> <\/i>Bidoup – Nuiba, evergreen, forest, subtropical<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC L\u00c2M PH\u1ea6N C\u00d3 D\u1eba XANH PH\u00c2N B\u1ed0 V\u00c0 T\u00c1I SINH LO\u00c0I D\u1eba XANH (Lithocarpus pseudosundaicus <\/i>(Hickel et A.Camus) Camus) T\u1ea0I M\u1ed8T S\u1ed0 T\u1ec8NH MI\u1ec0N N\u00daI PH\u00cdA B\u1eaeC<\/p>\n

B\u00f9i Tr\u1ecdng Th\u1ee7y1<\/sup>, L\u01b0\u01a1ng Th\u1ebf D\u0169ng2<\/sup>, L\u00ea V\u0103n Quang3<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u00f4ng B\u1eafc B\u1ed9
\n2<\/sup>Trung t\u00e2m Nghi\u00ean c\u1ee9u L\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7
\n3<\/sup>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\u1eaeTNghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i 8 t\u1ec9nh g\u1ed3m: B\u0103\u0301c Giang, Ha\u0300 Giang, Ha\u0300 N\u00f4\u0323i, Cao B\u0103\u0300ng, Hoa\u0300 Bi\u0300nh, La\u0300o Cai, Tuy\u00ean Quang, Vi\u0303nh Phu\u0301c, trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean co\u0301 loa\u0300i De\u0309 xanh ph\u00e2n b\u00f4\u0301. K\u1ebft qu\u1ea3 cho th\u1ea5y: De\u0309 xanh co\u0301 ph\u00e2n b\u00f4\u0301 \u01a1\u0309 4 tra\u0323ng tha\u0301i r\u01b0\u0300ng IIA, IIB, IIIA1 va\u0300 IIIA3, \u01a1\u0309 \u0111ai cao 100 – 700m, t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf tr\u1ea1ng th\u00e1i IIA va\u0300 IIB va\u0300 \u0111ai cao d\u01b0\u01a1\u0301i 500m. \u0110\u1eb7c \u0111i\u1ec3m chung c\u1ee7a t\u1ea7ng c\u00e2y cao: m\u00e2\u0323t \u0111\u00f4\u0323 dao \u0111\u00f4\u0323ng 468 – 1.044 c\u00e2y\/ha; v\u1edbi 15 – 34 loa\u0300i, trong \u0111o\u0301 co\u0301 3 – 13 loa\u0300i tham gia chi\u0301nh va\u0300o c\u00f4ng th\u01b0\u0301c t\u00f4\u0309 tha\u0300nh v\u01a1\u0301i h\u00ea\u0323 s\u00f4\u0301 t\u00f4\u0309 tha\u0300nh 5,0 – 29,3%; r\u01b0\u0300ng c\u00f3 3 t\u00e2\u0300ng ta\u0301n ch\u00ednh v\u1edbi \u0111\u00f4\u0323 ta\u0300n che 0,5 – 0,7. M\u00e2\u0323t \u0111\u00f4\u0323 c\u1ee7a lo\u00e0i De\u0309 xanh kha\u0301 th\u00e2\u0301p, dao \u0111\u00f4\u0323ng 4 – 84 c\u00e2y\/ha va\u0300 th\u01b0\u01a1\u0300ng mo\u0323c tha\u0300nh cu\u0323m 2 – 5 c\u00e2y, trong \u0111o\u0301 ph\u00e2n b\u00f4\u0301 t\u00e2\u0323p trung nh\u00e2\u0301t \u01a1\u0309 \u0111ai cao 100 – 300m v\u01a1\u0301i s\u00f4\u0301 l\u01b0\u01a1\u0323ng 44 – 84 c\u00e2y\/ha. T\u1ea7ng c\u00e2y t\u00e1i sinh c\u00f3 m\u00e2\u0323t \u0111\u00f4\u0323 dao \u0111\u00f4\u0323ng t\u1eeb 1.680 – 4.000 c\u00e2y\/ha; v\u01a1\u0301i 14 – 25 loa\u0300i, trong \u0111o\u0301 co\u0301 4 – 9 loa\u0300i tham gia chi\u0301nh va\u0300o c\u00f4ng th\u01b0\u0301c t\u00f4\u0309 tha\u0300nh; 79,7% c\u00e2y ta\u0301i sinh co\u0301 ngu\u00f4\u0300n g\u00f4\u0301c t\u01b0\u0300 ha\u0323t v\u00e0 20,1% c\u00f3 ngu\u00f4\u0300n g\u00f4\u0301c t\u01b0\u0300 ch\u00f4\u0300i. Ty\u0309 l\u00ea\u0323 c\u00e2y ta\u0301i sinh co\u0301 ph\u00e2\u0309m ch\u00e2\u0301t x\u00e2\u0301u l\u00e0 9,3%; ty\u0309 l\u00ea\u0323 c\u00e2y ta\u0301i sinh co\u0301 tri\u00ea\u0309n vo\u0323ng c\u00f3 chi\u00ea\u0300u cao l\u01a1\u0301n h\u01a1n 2m la\u0300 12,2%. M\u00e2\u0323t \u0111\u00f4\u0323 De\u0309 xanh ta\u0301i sinh dao \u0111\u00f4\u0323ng 80 – 400 c\u00e2y\/ha, trong \u0111o\u0301 82,7% De\u0309 xanh ta\u0301i sinh t\u01b0\u0300 ha\u0323t v\u00e0 t\u1eeb ch\u00f4\u0300i l\u00e0 17,3%; ty\u0309 l\u00ea\u0323 c\u00e2y ta\u0301i sinh cu\u0309a De\u0309 xanh co\u0301 ph\u00e2\u0309m ch\u00e2\u0301t x\u00e2\u0301u la\u0300 6,6%; ty\u0309 l\u00ea\u0323 c\u00e2y t\u00e1i sinh D\u1ebb xanh co\u0301 tri\u00ea\u0309n vo\u0323ng chi\u0309 chi\u00ea\u0301m 6,1%. C\u00e2\u0300n \u00e1p d\u1ee5ng ca\u0301c bi\u00ea\u0323n pha\u0301p l\u00e2m sinh ph\u00f9 h\u1ee3p nh\u01b0 \u0111\u1ec3 l\u1ea1i c\u00e1c lo\u00e0i c\u00e2y m\u1eb9 c\u00f3 gi\u00e1 tr\u1ecb cao \u0111\u1ec3 gieo gi\u00f4\u0301ng, ch\u0103\u0323t b\u01a1\u0301t c\u00e2y phi mu\u0323c \u0111i\u0301ch \u01a1\u0309 t\u00e2\u0300ng c\u00e2y cao va\u0300 t\u00e2\u0300ng c\u00e2y ta\u0301i sinh,… nh\u0103\u0300m ca\u0309i thi\u00ea\u0323n t\u00f4\u0309 tha\u0300nh t\u00e2\u0300ng c\u00e2y cao v\u00e0 t\u00e2\u0300ng c\u00e2y ta\u0301i sinh, g\u00f3p ph\u1ea7n n\u00e2ng cao n\u0103ng su\u1ea5t ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng t\u1ef1 nhi\u00ean trong khu v\u1ef1c nghi\u00ean c\u1ee9u.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>C\u1ea5u tr\u00fac v\u00e0 t\u00e1i sinh, D\u1ebb xanh, mi\u1ec1n n\u00fai ph\u00eda B\u1eafc<\/td>\n<\/tr>\n

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Characterictic of stand structure and regeneration of Lithocarpus pseudosundaicus<\/i> (Hickel et A.Camus) Camus in some Northern moutainous provinces<\/strong><\/p>\n

The study has been carried out in natural forests in 8 provinces of Bac Giang, Ha Giang, Ha Noi, Cao Bang, Hoa Binh, Lao Cai, Tuyen Quang, and Vinh Phuc, where De xanh naturally occurs. The result shows that Lithocarpus pseudosundaicus<\/i> (Hickel et A.Camus) Camus generally distributes at the altitude of 100 – 700m of 4 natural forests of IIA, IIB, IIIA1 and IIIA3, but focuses mainly in the IIA and IIB, at the altitude lower than 500m. The forest canopy has 3 main layers with the shading level is 0.5 – 0.7. The general characteristic of the high plant layer: the density is 468 – 1,044 trees\/ha; 15 – 34 species, of which 3 – 13 species join mainly the species structure fomular with the species structure index is 5.0 – 29.3%. Lithocarpus pseudosundaicus <\/i>density is rather low, from 4 – 84 tree\/ha, and normally occurs in a group of 2 – 5 trees. They distributes strongly at the altitude of 100 – 300m, with the density of 44 – 84 trees\/ha. The regeneration density of the natural forests, where Lithocarpus pseudosundaicus <\/i>occurs, is from 1,680 – 4,000 seedlings\/ha; with 14 – 25 species, of which 4 – 9 speices join mainly the species structure formula; 79.7% regeneration seedlings were born by seed, 20.1% by buds. The rate of bad regeneration seedlings is 9.3%; the rate of potential seedlings having height to be higher than 2m is 12.2%. The density of Lithocarpus pseudosundaicus <\/i>seedlings is 80 – 400 seedlings\/ha, of which 82.7% were born by seeds, 17.3% were by buds; the rate of bad seedling of Lithocarpus pseudosundaicus <\/i>is 6.6%; the rate of potential seedlings of Lithocarpus pseudosundaicus <\/i>is only 6.1%. It is, therfore, necessary to apply appropriate silvicultural methods such as to remain good Lithocarpus pseudosundaicus <\/i>parent trees to produce seeds, to thin un – valuable trees and seedlings… to improve the quality of forest, contributing to the improvement of quality and productivity of natural forests in the study area.<\/p>\n

Keywords:<\/i><\/b> <\/i>Structure and regeneration, Lithocarpus pseudosundaicus<\/i> (Hickel et A.Camus) Camus, the Northern moutainous area<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC V\u00c0 T\u00c1I SINH R\u1eeaNG T\u1ef0 NHI\u00caN N\u01a0I C\u00d3 LO\u00c0I NGHI\u1ebeN (Burretiodendron hsienmu <\/i>Chun et How) PH\u00c2N B\u1ed0 T\u1ea0I \u0110I\u1ec6N BI\u00caN V\u00c0 S\u01a0N LA<\/p>\n

Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y B\u1eafc<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTNghi\u1ebfn (Burretiodendron hsienmu <\/i>Chun et How) l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, ph\u00e2n b\u1ed1 v\u00e0 m\u1ecdc t\u1ef1 nhi\u00ean tr\u00ean c\u00e1c khu v\u1ef1c n\u00fai \u0111\u00e1 v\u00f4i c\u00f3 \u0111\u1ed9 cao d\u01b0\u1edbi 1000m thu\u1ed9c ph\u00eda B\u1eafc Vi\u1ec7t Nam v\u00e0 t\u1ec9nh Qu\u1ea3ng T\u00e2y, V\u00e2n Nam (Trung Qu\u1ed1c). Nghi\u1ebfn l\u00e0 lo\u00e0i qu\u00fd hi\u1ebfm thu\u1ed9c nh\u00f3m IIA c\u1ee7a Ngh\u1ecb \u0111\u1ecbnh s\u1ed1 32\/2006\/N\u0110-CP c\u1ee7a ch\u00ednh ph\u1ee7 Vi\u1ec7t Nam v\u00e0 nh\u00f3m UV – s\u1ebd nguy c\u1ea5p trong s\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam 2007. Trong c\u1ea5u tr\u00fac t\u1ea7ng c\u00e2y cao r\u1eebng t\u1ef1 nhi\u00ean c\u00f3 Nghi\u1ebfn ph\u00e2n b\u1ed1 t\u1ea1i S\u01a1n La v\u00e0 \u0110i\u1ec7n Bi\u00ean th\u00ec Nghi\u1ebfn thu\u1ed9c nh\u00f3m lo\u00e0i \u01b0u th\u1ebf sinh th\u00e1i v\u00e0 c\u00f3 s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 l\u1edbn nh\u1ea5t so v\u1edbi c\u00e1c lo\u00e0i kh\u00e1c trong l\u00e2m ph\u1ea7n v\u1edbi IV% dao \u0111\u1ed9ng t\u1eeb 13,86 – 36,62% v\u00e0 h\u1ec7 s\u1ed1 (Ki%) t\u1eeb 9,33 – 21,74%; \u0110\u01b0\u1eddng k\u00ednh D1.3<\/sub> c\u1ee7a Nghi\u1ebfn dao \u0111\u1ed9ng t\u1eeb 13,8 – 54cm, chi\u1ec1u cao Hvn<\/sub> dao \u0111\u1ed9ng t\u1eeb 8,6 – 22,6m; Lo\u00e0i c\u00f3 x\u00e1c su\u1ea5t xu\u1ea5t hi\u1ec7n c\u00f9ng Nghi\u1ebfn nhi\u1ec1u nh\u1ea5t ph\u1ea3i k\u1ec3 \u0111\u1ebfn l\u00e0 L\u00e1t hoa (Nghi\u1ebfn (1) v\u00e0 L\u00e1t hoa (0,77)). L\u1edbp c\u00e2y t\u00e1i sinh c\u00f3 m\u1eadt \u0111\u1ed9 dao \u0111\u1ed9ng t\u1eeb 5.900 – 7.300 c\u00e2y\/ha, c\u00e2y t\u00e1i sinh c\u00f3 tri\u1ec3n v\u1ecdng chi\u1ebfm t\u1ef7 l\u1ec7 t\u1eeb 73 – 88% s\u1ed1 c\u00e2y t\u00e1i sinh trong l\u00e2m ph\u1ea7n, trong \u0111\u00f3 Nghi\u1ebfn t\u00e1i sinh v\u1eabn l\u00e0 m\u1ed9t lo\u00e0i ch\u00ednh trong t\u1ed5 th\u00e0nh v\u1edbi h\u1ec7 s\u1ed1 (Ki%) dao \u0111\u1ed9ng t\u1eeb 6,06 – 36,36%.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac, \u0110i\u1ec7n Bi\u00ean, Nghi\u1ebfn, r\u1eebng t\u1ef1 nhi\u00ean, <\/b>S\u01a1n La<\/p>\n

 <\/td>\n<\/tr>\n

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Structural characteristics of natural forest place that Nghien (Burretiodendron hsienmu Chun et How) distribution in Dien Bien and Son La<\/strong><\/p>\n

Nghien (Burretiodendron hsienmu <\/i>Chun et How) is a large tree species, distributed and naturally growing in limestone karst areas below 1000m in Northern of Viet Nam and Guangxi province, Yunnan province, China. Merchus is a rare species of Group IIA of Decree 32\/2006\/ ND\/CP of the Government of Vietnam and the UV group – will be endangered in the Vietnam Red Book 2007. In the structure of highland forest, In Son La and Dien Bien, Nghien belonged to the group of dominant ecological species and had the largest number of individuals compared with other species in the stand with IV% ranged from 13.86% to 36.62% and coefficient (Ki%) from 9.33% to 21.75%; The diameter of D1.3<\/sub> is from 13.8 to 54 cm, the height of Hvn<\/sub> ranges from 8.6 to 22.6m. Species with the highest probability of occurrence are Shrimp (0.83) and Flowering (0.77). The regeneration layer density ranges from 5,900 to 7,300 trees per hectare, with the potential regeneration of 73 to 88% of the regenerated trees in the stands, of which regeneration remains the dominant species. The composition of the coefficient (Ki) ranged from 6.06% to 36.36%.<\/p>\n

Keywords:<\/i><\/b> Burretiodendron hsienmu <\/i>Chun et How, Dien Bien, nature forest, Son La, structure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC H\u00ccNH TH\u00c1I V\u00c0 PH\u00c2N B\u1ed0 C\u1ee6A LO\u00c0I V\u1ea6U \u0110\u1eaeNG (Indosasa angustata<\/i>\u00a0Mc.Clure)
\n\u1ede HUY\u1ec6N NA R\u00cc – T\u1ec8NH B\u1eaeC K\u1ea0N<\/p>\n

\u00a0\u00a0\u00a0 Ng\u00f4 Xu\u00e2n H\u1ea3i 1*<\/sup>, Tr\u1ea7n C\u00f4ng Qu\u00e2n2<\/sup><\/p>\n

1<\/sup>S\u1edf N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n t\u1ec9nh Th\u00e1i Nguy\u00ean
\n2<\/sup> Khoa L\u00e2m nghi\u1ec7p, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m Th\u00e1i Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTV\u1ea7u \u0111\u1eafng (Indosasa angustata<\/i>\u00a0Mc.Clure) l\u00e0 lo\u00e0i tre c\u00f3 th\u00e2n ng\u1ea7m m\u1ecdc t\u1ea3n, th\u00e2n kh\u00ed sinh m\u1ecdc ph\u00e2n t\u00e1n, \u0111\u00e2y l\u00e0 lo\u00e0i c\u00e2y \u0111a t\u00e1c d\u1ee5ng ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean \u1edf nhi\u1ec1u t\u1ec9nh v\u00f9ng trung du mi\u1ec1n n\u00fai ph\u00eda B\u1eafc n\u01b0\u1edbc ta. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u1eefng n\u1ed9i dung sau: (1) \u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac h\u00ecnh th\u00e1i: Th\u00e2n kh\u00ed sinh (\u0111\u01b0\u1eddng k\u00ednh D00<\/sub> t\u1eeb 5 – 8,5cm, chi\u1ec1u cao Hvn<\/sub> 14,65m; V\u00e1ch th\u00e2n kh\u00ed sinh \u1edf c\u00e1ch g\u1ed1c 1,3m d\u00e0y 1,13cm, l\u00ean \u0111\u1ebfn \u0111o\u1ea1n 5m v\u00e1ch d\u00e0y 0,89cm v\u00e0 \u1edf \u0111o\u1ea1n cao 10m v\u00e1ch th\u00e2n d\u00e0y 0,63m); C\u1ea5u tr\u00fac th\u00e2n ng\u1ea7m (Th\u00e2n ng\u1ea7m ph\u00e2n th\u00e0nh 10 – 12 \u0111\u1ed1t, c\u00e1c \u0111\u1ed1t d\u00e0i t\u1eeb 2,3- 2,5cm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 1,8 – 2,4cm, Th\u00e2n ng\u1ea7m m\u1ecdc \u1edf \u0111\u1ed9 s\u00e2u 30 – 40cm, khi nh\u00f4 l\u00ean kh\u1ecfi m\u1eb7t \u0111\u1ea5t m\u00e0u xanh l\u00e1 c\u00e2y); C\u00e0nh v\u00e0 c\u00e1ch ph\u00e2n c\u00e0nh (kho\u1ea3ng 1\/3 th\u00e2n c\u00e2y tr\u1edf l\u00ean th\u00e2n c\u00e2y m\u1edbi xu\u1ea5t hi\u1ec7n c\u00e0nh \u0111\u00f9i g\u00e0, c\u00e1c c\u00e0nh t\u1ea1o m\u1ed9t g\u00f3c t\u1eeb 30 – 450 <\/sup>so v\u1edbi th\u00e2n kh\u00ed sinh, c\u00e0nh \u0111\u00f9i g\u00e0 to 1,14 – 1,6 cm); C\u1ea5u tr\u00fac l\u00e1 V\u1ea7u \u0111\u1eafng; (2) Ph\u00e2n b\u1ed1 lo\u00e0i V\u1ea7u \u0111\u1eafng: Ph\u00e2n b\u1ed1 r\u1eebng V\u1ea7u \u0111\u1eafng thu\u1ea7n lo\u00e0i theo v\u1ecb tr\u00ed \u0111\u1ecba h\u00ecnh; Ph\u00e2n b\u1ed1 r\u1eebng V\u1ea7u \u0111\u1eafng thu\u1ea7n lo\u00e0i theo tr\u1ea1ng th\u00e1i r\u1eebng; (3) \u0110\u1ec1 xu\u1ea5t m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh cho t\u1ed5 ch\u1ee9c kinh doanh r\u1eebng V\u1ea7u \u0111\u1eafng thu\u1ea7n lo\u00e0i \u1edf huy\u1ec7n Na R\u00ec, t\u1ec9nh B\u1eafc K\u1ea1n theo h\u01b0\u1edbng ph\u00e1t tri\u1ec3n r\u1eebng b\u1ec1n v\u1eefng.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>B\u1eafc K\u1ea1n, c\u1ea5u tr\u00fac, h\u00ecnh th\u00e1i, Na R\u00ec, ph\u00e2n b\u1ed1, V\u1ea7u \u0111\u1eafng<\/td>\n<\/tr>\n

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Research on morphological characteristics and distribution of Indosasa sinica C.D. Chu & C.S in Nari District, Bac Kan province<\/strong><\/p>\n

Indosasa angustata\u00a0(Indosasa angustata<\/i>\u00a0Mc.Clure) is bamboo species trunk grows underground dispersed, gas trunk grows dispersed, This is multi – purpose tree species natural distribution Midlands provinces in the Northern mountainous country. Research results achieved the following: (1) Structural morphological characteristics: Gas trunk (stem diameter D00<\/sub> t\u1eeb 5 – 8.5cm, tree height Hvn<\/sub> 14.65m; walls of gas trunk in the original way 1.3m thick 1.13cm, up to paragraph 5.0m walls of gas trunk thick 0.89cm and up to paragraph 10m walls of gas trunk thick 0.63m; Underground stems divided into 10 – 12 burning, the long burning bamboo 2.3 – 2.5cm, diameter reached from 1.8 – 2.4cm, underground trunk located at depths 30 – 40cm, rising out of the ground when the green; bough and branch (about 1\/3 of the trunk and older branches trunk emerging chicken thighs, branches create an angle from 30 – 450 versus gas trunk, Chicken thighs spike to around 1.14 – 1.60cm); There is in addition the research results: structure leaf, cataphyll, fruit…(2) Species distribution Indosasa angustata<\/i>: Monoculture Indosasa sinica forests topographic location; monoculture Indosasa angustata<\/i>\u00a0forests by forest conditions; (3) A number of measures proposed silvicultural for business organization pure Indosasa angustata\u00a0<\/i>Forest in Na Ri district, Bac Kan province towards sustainable forest development.<\/p>\n

Keywords:<\/i><\/b> <\/i>Bac Kan, structure, morphology,
\nNa Ri, distribution, Indosasa angustata<\/i><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u00c1NH GI\u00c1 SINH TR\u01af\u1edeNG M\u1ed8T S\u1ed0 LO\u00c0I C\u00c2Y B\u1ea2N \u0110\u1ecaA TRONG M\u00d4 H\u00ccNH TR\u1ed2NG V\u00c0 L\u00c0M GI\u00c0U R\u1eeaNG \u1ede V\u00d9NG CAO\u00a0 M\u1ed8T S\u1ed0 T\u1ec8NH MI\u1ec0N N\u00daI PH\u00cdA B\u1eaeC<\/p>\n

B\u00f9i Tr\u1ecdng Th\u1ee7y1<\/sup>, Ho\u00e0ng Xu\u00e2n Di\u1ec7u1<\/sup>, Ph\u1ea1m Minh To\u1ea1i2<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Khoa h\u1ecdc L\u00e2m nghi\u1ec7p \u0110\u00f4ng B\u1eafc B\u1ed9
\n2<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTNghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf v\u00f9ng cao t\u1eeb 700 – 1,200m \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh mi\u1ec1n n\u00fai ph\u00eda B\u1eafc (Cao B\u1eb1ng, Y\u00ean B\u00e1i, S\u01a1n La). K\u1ebft qu\u1ea3 cho th\u1ea5y, c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba nh\u01b0 C\u00e1ng l\u00f2, Xoan nh\u1eeb, S\u1ed3i ph\u1ea3ng, T\u1ed1ng qu\u00e1 s\u1ee7, T\u00f4 h\u1ea1p \u0111i\u1ec7n bi\u00ean tr\u1ed3ng h\u1ed7n giao v\u1edbi c\u00e2y nh\u1eadp n\u1ed9i g\u1ed3m B\u1ea1ch \u0111\u00e0n urophylla, <\/i>Keo melanoxylon <\/i>sau 38 th\u00e1ng tr\u1ed3ng t\u1ecf ra c\u00f3 tri\u1ec3n v\u1ecdng, t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t 80 – 90%, v\u1edbi c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh (D1.3<\/sub>) \u0111\u1ea1t t\u1eeb 3,3 – 5,3cm, chi\u1ec1u cao (Hvn<\/sub>) 2,6 – 4,6m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n (Dt<\/sub>) 1,3 – 2,3m, n\u0103ng su\u1ea5t (NS) 0,36 – 1,56 m3<\/sup>\/ha\/n\u0103m. Trong m\u00f4 h\u00ecnh tr\u1ed3ng h\u1ed7n giao c\u00e2y b\u1ea3n \u0111\u1ecba v\u1edbi keo, c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba b\u01b0\u1edbc \u0111\u1ea7u sinh tr\u01b0\u1edfng nhanh h\u01a1n so v\u1edbi khi tr\u1ed3ng h\u1ed7n giao v\u1edbi b\u1ea1ch \u0111\u00e0n. K\u1ef9 thu\u1eadt x\u1eed l\u00fd t\u1ea7ng c\u00e2y cao trong m\u00f4 h\u00ecnh l\u00e0m gi\u00e0u r\u1eebng (b\u0103ng ch\u1eb7t, b\u0103ng ch\u1eeba) v\u1edbi chi\u1ec1u r\u1ed9ng b\u0103ng ch\u1eb7t b\u1eb1ng 1\/3 chi\u1ec1u cao t\u1ea7ng c\u00e2y cao (r\u1ed9ng 4m) cho c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba cao h\u01a1n so v\u1edbi c\u00f4ng th\u1ee9c c\u00f3 chi\u1ec1u r\u1ed9ng b\u0103ng ch\u1eb7t b\u1eb1ng 1\/2 chi\u1ec1u cao c\u1ee7a t\u1ea7ng c\u00e2y cao (r\u1ed9ng 6m). Ti\u00eau chu\u1ea9n c\u00e2y con \u0111em tr\u1ed3ng l\u00e0m gi\u1ea7u r\u1eebng c\u00f3 chi\u1ec1u cao l\u1edbn h\u01a1n 1m sau 38 th\u00e1ng tu\u1ed5i cho n\u0103ng su\u1ea5t (0,28 – 1,22 m3<\/sup>\/ha\/n\u0103m) v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n c\u00e2y con c\u00f3 chi\u1ec1u cao t\u1eeb 0,4 – 0,6m (0,12 – 0,66m3<\/sup>\/ha\/n\u0103m) ho\u1eb7c 0,6 – 1m (0,18 – 0,99m3<\/sup>\/ha\/n\u0103m).<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>C\u00e2y b\u1ea3n \u0111\u1ecba, mi\u1ec1n n\u00fai ph\u00eda B\u1eafc, sinh tr\u01b0\u1edfng, v\u00f9ng cao<\/td>\n<\/tr>\n

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Growth assessment of native species in planting and enrichment models in high areas of Northern mountainous provinces<\/strong><\/p>\n

The study was carried out in high areas (700 – 1.200m above sea level) of the Northern mountainous provinces of Cao Bang, Yen Bai and Son La. The results show that the native species (Betula alnoides<\/i> Buch. -Ham., Choerospondias axillaris<\/i> (Roxb.) Burttet Hill, Lithocarpus fissus <\/i>Champ. ex Benth, Alnus nepalensis<\/i> D, Altingia siamensis<\/i> Craib) planted with exotic species (Eucalyptus urophylla, Acacia melanoxylon<\/i>) are potential, as the survival rate is 80 – 90%; 38 months after planting, diameter (D1.3<\/sub>) is 3.3 – 5.3cm, height (Hvn<\/sub>) is 2.6 – 4.6m, crown diameter (Dt<\/sub>) is 1.3 – 2.3m, productivity is 0.36 – 1.56 m3<\/sup>\/ha\/year. Regarding the planting mixture of native species with Acacia<\/i>, native species grow faster than those mixed with Eucalyptus<\/i>. Growth of native species in models planted in enrichment models with width of clear band and remained band are 1\/3 tree height (width 4m) is better than that of native speces planted in width of clear band and remained band are \u00bd tree height (width 6m). 38 moths after planting, productivity of native species in enrichment models planted by big seedlings (height is more than 1m) is 0.28 – 1.22 m3<\/sup>\/ha\/year, higher than that of smaller seedlings (0.4 – 0.6m in height) with the productivity is 0.12 – 0.66m3<\/sup>\/ha\/year or seedlings (0.6 – 1m in height) with the productivity is 0.18 – 0.99m3<\/sup>\/ha\/year.<\/p>\n

Keywords:<\/i><\/b> <\/i>High areas, native species, Northern mountainous areas, growth<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC C\u1ee6A M\u1ed8T S\u1ed0 TR\u1ea0NG TH\u00c1I R\u1eeaNG T\u1ef0 NHI\u00caN PH\u1ee4C H\u1ed2I T\u1ea0I X\u0102M KH\u00d2E, MAI CH\u00c2U, H\u00d2A B\u00ccNH<\/p>\n

Ho\u00e0ng V\u0103n Th\u1eafng1<\/sup>, C\u00f9 Th\u1ecb L\u1ed9c2<\/sup>, Ph\u00f9ng \u0110\u00ecnh Trung1<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh1<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup> Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTK\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac c\u1ee7a 3 tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean IIA, IIB, IIIA do c\u1ed9ng \u0111\u1ed3ng qu\u1ea3n l\u00fd t\u1ea1i X\u0103m Kh\u00f2e, Mai Ch\u00e2u, H\u00f2a B\u00ecnh cho th\u1ea5y, c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i trong khu v\u1ef1c nghi\u00ean c\u1ee9u l\u00e0 lo\u1ea1i r\u1eebng ngh\u00e8o v\u00e0 r\u1eebng trung b\u00ecnh v\u1edbi c\u00e1c ch\u1ec9 ti\u00eau b\u00ecnh qu\u00e2n c\u1ee7a t\u1ea7ng c\u00e2y cao l\u00e0: M\u1eadt \u0111\u1ed9 t\u1eeb 811 – 955 c\u00e2y\/ha, sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 12,4 – 19,5cm; chi\u1ec1u cao t\u1eeb 9,8 – 12,4m; ti\u1ebft di\u1ec7n ngang t\u1eeb 13,1 – 18,8 m2<\/sup>\/ha v\u00e0 tr\u1eef l\u01b0\u1ee3ng \u0111\u1ea1t t\u1eeb 74,4 – 130,8 m3<\/sup>\/ha. S\u1ed1 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn xu\u1ea5t hi\u1ec7n trong tr\u1ea1ng th\u00e1i IIA l\u00e0 61 lo\u00e0i, tr\u1ea1ng th\u00e1i IIB l\u00e0 62 lo\u00e0i v\u00e0 tr\u1ea1ng th\u00e1i IIIA l\u00e0 57 lo\u00e0i, trong \u0111\u00f3 t\u00f9y theo c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng c\u00f3 4 – 9 lo\u00e0i chi\u1ebfm \u01b0u th\u1ebf v\u00e0 tham gia v\u00e0o c\u00e1c c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh (CTTT). C\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u \u0111\u00e3 h\u00ecnh th\u00e0nh 6 \u01b0u h\u1ee3p th\u1ef1c v\u1eadt. V\u1edbi \u0111\u1ed9 tin c\u1eady 95% c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng quy lu\u1eadt ph\u00e2n b\u1ed1 th\u1ef1c nghi\u1ec7m N\/D1.3<\/sub> c\u1ee7a \u0111a s\u1ed1 c\u00e1c \u00f4 ti\u00eau chu\u1ea9n (OTC) trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u tu\u00e2n theo ph\u00e2n b\u1ed1 Kho\u1ea3ng c\u00e1ch v\u00e0 \u0111a s\u1ed1 c\u00f3 ki\u1ec3u ph\u00e2n b\u1ed1 l\u00e0 d\u1ea1ng c\u1ee5m. M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh (c\u00e2y c\u00f3 D1.3<\/sub> < 6cm) trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng ph\u1ee5c h\u1ed3i dao \u0111\u1ed9ng t\u1eeb 5.844 – 7.700 c\u00e2y\/ha, trong \u0111\u00f3 ch\u1ee7 y\u1ebfu l\u00e0 c\u00e2y t\u00e1i sinh c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf h\u01a1n 1,0cm (56,0 – 71,5%). T\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh tri\u1ec3n v\u1ecdng kh\u00e1 cao (43,0 – 67,5%). S\u1ed1 l\u01b0\u1ee3ng lo\u00e0i c\u00e2y t\u00e1i sinh chi\u1ebfm \u01b0u th\u1ebf tham gia c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn gi\u1eefa c\u00e1c OTC (3 – 15 lo\u00e0i) v\u00e0 gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng (3 – 7 lo\u00e0i). C\u00e2y t\u00e1i sinh trong t\u1ea5t c\u1ea3 c\u00e1c \u00f4 ti\u00eau chu\u1ea9n c\u1ee7a c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng \u0111\u1ec1u c\u00f3 ph\u00e2n b\u1ed1 c\u1ee5m.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>\u0110\u1eb7c \u0111i\u1ec3m, c\u1ea5u tr\u00fac, H\u00f2a B\u00ecnh, ph\u1ee5c h\u1ed3i, r\u1eebng t\u1ef1 nhi\u00ean<\/td>\n<\/tr>\n

\n

Structural characteristics of natural forest types in Xam Khoe, Mai Chau, Hoa Binh province<\/strong><\/p>\n

The results of the study on the structural characteristics of three forest types of IIA, IIB, IIIA managed by local community in Xam Khoe, Mai Chau, Hoa Binh show that, the natural forest types in the study area is poor and medium forest with the average criteria of stands are: density 811 – 955 trees ha, diameter from 12.4 – 19.5cm; height from 9.8 – 12.4m; the basal area is 13.1 – 18.8m2 <\/sup>ha – 1<\/sup> and the yield is 74.4 – 130.8m3 <\/sup>ha – 1<\/sup>. There are 61 species in IIA type, 62 species in IIB and 57 species in IIIA type, of which 4 to 9 dominate species appear in the species formation. The restoration natural forest types in the study area has formed 6 plant dominions. With 95% confidence it can be concluded that the N\/D1.3<\/sub> distribution of the standards in the study area were fitted the Distance Distribution and most of them are distributed in cluster distributions. The regeneration of regenerated trees (trees with D1.3<\/sub> < 6cm) in regenerated forest types in the study area is relatively good, ranged from 5,844 – 7,700 trees\/ha. A large proportion (56.0 – 71.5%) is a regeneration tree with a diameter less than 1cm. The number of dominant regenerated tree species are present in the species formula varies considerably between sample plots (3 to 15 species) and between forest types (3 – 7 species). Regenerated trees in all plots of forest types have cluster distribution.<\/p>\n

Keywords:<\/i><\/b> <\/i>Characteristics, Hoa Binh, natural forest, structure, restoration<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

X\u00c1C \u0110\u1ecaNH M\u1ee8C TH\u00cdCH NGHI C\u1ee6A L\u00c0M GI\u00c0U R\u1eeaNG KH\u1ed8P B\u1eb0NG C\u00c2Y T\u1ebeCH (Tectona grandis<\/i> L.f.) THEO C\u00c1C NH\u00c2N T\u1ed0 QUAN TR\u1eaeC TR\u1ef0C TI\u1ebeP V\u00c0 TH\u1ef0C V\u1eacT CH\u1ec8 TH\u1eca<\/p>\n

Ph\u1ea1m C\u00f4ng Tr\u00ed1<\/sup>, B\u1ea3o Huy2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc K\u1ef9 thu\u1eadt N\u00f4ng L\u00e2m nghi\u1ec7p T\u00e2y Nguy\u00ean
\n2<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTSau nhi\u1ec1u n\u0103m khai th\u00e1c g\u1ed7 kh\u00f4ng b\u1ec1n v\u1eefng, r\u1eebng kh\u1ed9p (r\u1eebng kh\u00f4 r\u1ee5ng l\u00e1 c\u00e2y h\u1ecd D\u1ea7u \u01b0u th\u1ebf) \u0111\u00e3 tr\u1edf n\u00ean ngh\u00e8o v\u1ec1 g\u1ed7 v\u00e0 t\u1eeb \u0111\u00f3 nhi\u1ec1u di\u1ec7n t\u00edch \u0111\u00e3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00e1c lo\u1ea1i c\u00e2y c\u00f4ng nghi\u1ec7p nh\u01b0 cao su. M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 \u0111\u00e1nh gi\u00e1 vi\u1ec7c tr\u1ed3ng c\u00e2y g\u1ed7 T\u1ebfch (Tectona grandis<\/i> L.f.) trong \u0111i\u1ec1u ki\u1ec7n r\u1eebng kh\u1ed9p suy tho\u00e1i v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c nh\u00e2n t\u1ed1 quan s\u00e1t tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 th\u00edch nghi c\u1ee7a c\u00e2y T\u1ebfch trong l\u00e0m gi\u00e0u r\u1eebng kh\u1ed9p. 42 \u00f4 th\u00ed nghi\u1ec7m v\u1edbi di\u1ec7n t\u00edch 4.900m2<\/sup> (bao g\u1ed3m 64 \u00f4 sinh th\u00e1i) \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp v\u00e0 \u0111\u01b0\u1ee3c quan s\u00e1t trong 4 \u0111\u1ebfn 5 n\u0103m \u0111\u1ec3 th\u1eed nghi\u1ec7m vi\u1ec7c l\u00e0m gi\u00e0u r\u1eebng kh\u1ed9p b\u1eb1ng c\u00e2y T\u1ebfch theo c\u00e1c t\u1ed5 h\u1ee3p c\u00e1c nh\u00e2n t\u1ed1 kh\u00e1c nhau. M\u00f4 h\u00ecnh h\u1ed3i quy \u0111a bi\u1ebfn, phi tuy\u1ebfn, c\u00f3 tr\u1ecdng s\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c nh\u00e2n t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee5 th\u00edch nghi c\u1ee7a c\u00e2y T\u1ebfch. K\u1ebft qu\u1ea3 l\u00e0 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i kh\u1eafc nghi\u1ec7t c\u1ee7a r\u1eebng kh\u1ed9p, tr\u1ed3ng b\u1ed5 sung b\u1eb1ng c\u00e2y g\u1ed7 T\u1ebfch \u0111\u00e3 cho k\u1ebft qu\u1ea3 \u0111\u1ea7y h\u1ee9a h\u1eb9n v\u1edbi b\u1ed1n m\u1ee9c \u0111\u1ed9 th\u00edch nghi; v\u00e0 k\u1ebft qu\u1ea3 c\u0169ng cho th\u1ea5y r\u1eb1ng b\u1ed1n nh\u00e2n t\u1ed1 quan s\u00e1t tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ee9c th\u00edch nghi c\u1ee7a c\u00e2y T\u1ebfch l\u00e0 ng\u1eadp \u00fang trong m\u00f9a m\u01b0a; s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a lo\u00e0i C\u1ecf l\u00e0o (Eupatorium odoratum<\/i> L.) ch\u1ec9 th\u1ecb cho ti\u1ec1m n\u0103ng t\u0103ng tr\u01b0\u1edfng c\u1ee7a g\u1ed7 T\u1ebfch; t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m k\u1ebft von tr\u00ean m\u1eb7t \u0111\u1ea5t r\u1eebng v\u00e0 c\u00e1c lo\u00e0i c\u00e2y r\u1eebng kh\u1ed9p \u01b0u th\u1ebf.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>C\u00e2y t\u1ebfch, l\u00e0m gi\u00e0u r\u1eebng, m\u1ee9c th\u00edch nghi, r\u1eebng kh\u1ed9p, th\u1ef1c v\u1eadt ch\u1ec9 th\u1ecb<\/p>\n

 <\/td>\n<\/tr>\n

\n

Determination of suitability level of enrichment planting of teak (Tectona grandis<\/i> L.F.) in the degraded dry deciduous dipterocarp forest by direct observed factors and indicator plants<\/strong><\/p>\n

After years of unsustainable logging, the dry deciduous dipterocarp forest (DDDF) has become poor in timber stocks and it has been converted to industrial crops such as rubber. The objectives of this study were to assess teak (Tectona grandis<\/i> L.f.) tree establishment under degraded DDDF conditions and to determine direct observed factors that influence the suitability of teak as a forest enrichment tree species. A set of 42 experimental plots of 4,900 m2<\/sup> each (including 64 ecological plots) was set up and observed for 4 – 5 years for testing enrichment planting with teak under various combinations of factors. Weighted, nonlinear, multivariate regression models were used to detect key factors that influenced the suitability of teak. As a result, under extreme ecological and environmental conditions of the DDDF, enrichment planting with teak gave promising results with four suitability levels; and the results also showed that four direct observed factors that affected the suitability of teak were waterlogging during the rainy season; the presence of Eupatorium odoratum<\/i> L., which indicated good growth potential for teak; percentage of small stone coverage and dominant tree species.<\/p>\n

Keywords:<\/i><\/b> <\/i>Dipterocarp forest, enrichment planting, indicator plant, teak suitability level<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

QUAN H\u1ec6 GI\u1eeeA \u0110\u1eb6C \u0110I\u1ec2M L\u01afU V\u1ef0C V\u1edaI CH\u1ebe \u0110\u1ed8 D\u00d2NG CH\u1ea2Y C\u1ee6A M\u1ed8T S\u1ed0 L\u01afU V\u1ef0C \u0110I\u1ec2N H\u00ccNH \u1ede VI\u1ec6T NAM<\/p>\n

Tr\u1ea7n Quang B\u1ea3o1<\/sup>, Nguy\u1ec5n V\u0103n \u0110o\u00e0n2<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n2<\/sup>T\u1ed5ng c\u1ee5c L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTB\u00e0i b\u00e1o tr\u00ecnh b\u00e0y t\u00f3m t\u1eaft k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1eb7c \u0111i\u1ec3m l\u01b0u v\u1ef1c (di\u1ec7n t\u00edch, chu vi, h\u00ecnh d\u1ea1ng, \u0111\u1ed9 d\u1ed1c) \u0111\u1ebfn \u0111\u1eb7c \u0111i\u1ec3m bi\u1ebfn \u0111\u1ed9ng d\u00f2ng ch\u1ea3y (h\u1ec7 s\u1ed1 t\u0103ng l\u0169, h\u1ec7 s\u1ed1 gi\u1ea3m l\u0169, h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng d\u00f2ng ch\u1ea3y, \u0111\u1ed9 mu\u1ed9n l\u0169) c\u1ee7a 17 l\u01b0u v\u1ef1c \u0111i\u1ec3n h\u00ecnh \u1edf Vi\u1ec7t Nam. C\u00e1c ch\u1ec9 s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u01b0u v\u1ef1c \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n t\u1eeb m\u00f4 h\u00ecnh s\u1ed1 h\u00f3a \u0111\u1ed9 cao (DEM), c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m d\u00f2ng ch\u1ea3y \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n d\u1ef1a tr\u00ean s\u1ed1 li\u1ec7u quan tr\u1eafc d\u00f2ng ch\u1ea3y t\u1ea1i \u0111i\u1ec3m \u0111\u1ea7u ra l\u01b0u v\u1ef1c trong n\u0103m 2010. C\u00e1c l\u01b0u v\u1ef1c nghi\u00ean c\u1ee9u c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed9ng l\u1edbn v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m l\u01b0u v\u1ef1c v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m d\u00f2ng ch\u1ea3y. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1eb7c \u0111i\u1ec3m l\u01b0u v\u1ef1c t\u1edbi \u0111\u1eb7c \u0111i\u1ec3m d\u00f2ng ch\u1ea3y nh\u01b0 sau: Di\u1ec7n t\u00edch l\u01b0u v\u1ef1c, chu vi l\u01b0u v\u1ef1c, ch\u1ec9 s\u1ed1 h\u00ecnh d\u1ea1ng l\u01b0u v\u1ef1c c\u00f3 li\u00ean h\u1ec7 \u0111\u1ed3ng bi\u1ebfn v\u1edbi h\u1ec7 s\u1ed1 t\u0103ng l\u0169, h\u1ec7 s\u1ed1 gi\u1ea3m l\u0169, h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng d\u00f2ng ch\u1ea3y (r > 0,5). \u0110\u1ed9 mu\u1ed9n l\u0169 li\u00ean h\u1ec7 kh\u00f4ng ch\u1eb7t v\u1edbi chu vi v\u00e0 ch\u1ec9 s\u1ed1 h\u00ecnh d\u1ea1ng l\u01b0u v\u1ef1c. \u0110\u1ed9 d\u1ed1c v\u00e0 \u0111\u1ed9 cao trung b\u00ecnh c\u1ee7a l\u01b0u v\u1ef1c \u00edt li\u00ean h\u1ec7 v\u1edbi c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m d\u00f2ng ch\u1ea3y.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>T\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y, \u0111\u1ec9nh l\u0169, l\u01b0u v\u1ef1c, \u0111\u1eb7c \u0111i\u1ec3m l\u01b0u v\u1ef1c<\/td>\n<\/tr>\n

\n

Relationship between watershed characteristics and flow rate of typical watersheds in Vietnam<\/strong><\/p>\n

This paper presents summary results of a study of relationship between watershed characteristics (size, perimeter, slope, shape) and flow regime (increasing and decreasing flow rates; flow coefficient of variation, time lag to peak flow) in 17 typical watersheds in Vietnam. The watershed characteristics are calculated from the DEM, the flow indices are calculated based on flow monitoring data at the outlet of the watersheds in 2010. The study watersheds are varying in both basin characteristics and flow indices. The results of statistical analysis on the effect of catchment characteristics on flow characteristics are as follows: watershed size, perimeter, shape index are directly significant with increasing and decreasing flow rate, flow coefficient of variation (r > 0.5). The time lag to peak flow is not significant with watershed perimeter and shape. Average slope and shape of watersheds are not significant related to any runoff indices.<\/p>\n

Keywords:<\/i><\/b> <\/i>Flow rate, peak flow, watershed, watershed characteristics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u1eec D\u1ee4NG \u1ea2NH LANDSAT \u0110A TH\u1edcI GIAN \u0110\u00c1NH GI\u00c1 BI\u1ebeN \u0110\u1ed8NG DI\u1ec6N T\u00cdCH R\u1eeaNG D\u01af\u1edaI \u1ea2NH H\u01af\u1edeNG C\u1ee6A X\u00c2Y D\u1ef0NG \u0110\u1eacP TH\u1ee6Y \u0110I\u1ec6N TUY\u00caN QUANG, T\u1ec8NH TUY\u00caN QUANG GIAI \u0110O\u1ea0N 2000 – 2016<\/p>\n

\u0110\u1ed7 Th\u1ecb Ho\u00e0i Thu, Nguy\u1ec5n H\u1ea3i H\u00f2a<\/p>\n

B\u1ed9 m\u00f4n K\u1ef9 thu\u1eadt M\u00f4i tr\u01b0\u1eddng, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTVi\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 gi\u00e1m s\u00e1t v\u00e0 \u0111\u00e1nh gi\u00e1 s\u1ef1 thay \u0111\u1ed5i t\u00e0i nguy\u00ean v\u00e0 m\u00f4i tr\u01b0\u1eddng, \u0111\u1eb7c bi\u1ec7t trong x\u00e1c \u0111\u1ecbnh bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng d\u01b0\u1edbi \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c nh\u00e2n t\u1ed1 kinh t\u1ebf x\u00e3 h\u1ed9i. Qua vi\u1ec7c \u1ee9ng d\u1ee5ng GIS v\u00e0 \u1ea3nh Landsat trong \u0111\u00e1nh gi\u00e1 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng, nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e2y d\u1ef1ng b\u1ea3n \u0111\u1ed3 hi\u1ec7n tr\u1ea1ng r\u1eebng v\u00e0 b\u1ea3n \u0111\u1ed3 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng khu v\u1ef1c Th\u1ee7y \u0111i\u1ec7n Tuy\u00ean Quang, t\u1ec9nh Tuy\u00ean Quang giai \u0111o\u1ea1n 2000 – 2016. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y di\u1ec7n t\u00edch r\u1eebng khu v\u1ef1c \u0111\u1eadp th\u1ee7y \u0111i\u1ec7n Tuy\u00ean Quang b\u1ecb bi\u1ebfn \u0111\u1ed9ng m\u1ea1nh, c\u1ee5 th\u1ec3 di\u1ec7n t\u00edch r\u1eebng suy gi\u1ea3m l\u00e0 946.54ha. \u0110\u1eb7c bi\u1ec7t l\u00e0 giai \u0111o\u1ea1n 2002 – 2007, di\u1ec7n t\u00edch r\u1eebng gi\u1ea3m 883.44ha m\u00e0 nguy\u00ean nh\u00e2n ch\u00ednh l\u00e0 do \u1ea3nh h\u01b0\u1edfng c\u1ee7a qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng th\u1ee7y \u0111i\u1ec7n Tuy\u00ean Quang.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>Bi\u1ebfn \u0111\u1ed9ng, di\u1ec7n t\u00edch r\u1eebng, \u0111\u1eadp th\u1ee7y \u0111i\u1ec7n, Landsat, Tuy\u00ean Quang<\/td>\n<\/tr>\n

\n

Using multi-temporal landsat data to monitor forest cover changes under construction of Tuyen Quang hydropower dam, Tuyen Quang province during 2000 – 2016<\/strong><\/p>\n

Remote sensing technology and GIS has been intensively and extensively applied in the field of monitoring and evaluating the natural resources and environment, in particular in quantifying the changes in forest covers driven by the social and economic factors. By using GIS technology together with the use of Landsat images, the study has quantified and assessed the changes in forest extents under the construction of Tuyen Quang hydropower dam in the period of 2000 – 2016. The study indicated that forest extents in Tuyen Quang hydropower dam area have significantly changed, forest areas decreased by 946.54 ha during the period of 2000- 2016. In particular, in the period 2002 – 2007, forest areas lost about 883.44ha, mainly due to the construction of Tuyen Quang hydropower dam.<\/p>\n

Keywords:<\/i><\/b> <\/i>Changes, forest extents, Landsat, hydropower dam,
\nTuyen Quang<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ee8NG D\u1ee4NG GIS V\u00c0 VI\u1ec4N TH\u00c1M X\u00c2Y D\u1ef0NG B\u1ea2N \u0110\u1ed2 PH\u00c2N V\u00d9NG TH\u00cdCH NGHI LO\u00c0I S\u00c2U R\u00d3M TH\u00d4NG (Dendrolimus <\/i>punctatus<\/i>) T\u1ea0I HUY\u1ec6N T\u0128NH GIA, THANH H\u00d3A<\/p>\n

Nguy\u1ec5n H\u1ea3i H\u00f2a1<\/sup>, Ph\u1ea1m Vi\u1ec7t B\u1eafc2<\/sup><\/p>\n

1<\/sup>B\u1ed9 m\u00f4n K\u1ef9 thu\u1eadt M\u00f4i tr\u01b0\u1eddng, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup>Chi c\u1ee5c Ph\u00e1t tri\u1ec3n L\u00e2m nghi\u1ec7p, Thanh H\u00f3a<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTTh\u00f4ng l\u00e0 m\u1ed9t trong nh\u1eefng lo\u00e0i c\u00e2y tr\u1ed3ng c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao, nh\u1ef1a Th\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p. Vi\u1ec7c tr\u1ed3ng th\u00f4ng thu\u1ea7n lo\u00e0i tr\u00ean quy m\u00f4 l\u1edbn c\u00f3 nguy c\u01a1 r\u1ea5t cao v\u1ec1 s\u00e2u b\u1ec7nh h\u1ea1i \u1edf Vi\u1ec7t Nam, \u0111\u1eb7c bi\u1ec7t t\u1ea1i huy\u1ec7n T\u0129nh Gia, t\u1ec9nh Thanh H\u00f3a. V\u00ec v\u1eady, c\u00f4ng t\u00e1c ph\u00f2ng tr\u1eeb s\u00e2u b\u1ec7nh h\u1ea1i r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi khu v\u1ef1c nghi\u00ean c\u1ee9u. S\u00e2u r\u00f3m th\u00f4ng ch\u1ee7 y\u1ebfu g\u00e2y h\u1ea1i c\u00e1c lo\u00e0i th\u00f4ng, \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c tr\u1ed3ng thu\u1ea7n lo\u00e0i, ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng sinh s\u1ea3n nhanh, ch\u1ec9 trong m\u1ed9t th\u1eddi gian ng\u1eafn c\u00f3 th\u1ec3 t\u0103ng l\u00ean th\u00e0nh m\u1ed9t qu\u1ea7n th\u1ec3 g\u00e2y h\u1ea1i v\u00f4 c\u00f9ng l\u1edbn. Vi\u1ec7c \u1ee9ng d\u1ee5ng GIS v\u00e0 vi\u1ec5n th\u00e1m \u0111\u1ec3 ph\u00e2n v\u00f9ng th\u00edch nghi v\u1edbi kh\u1ea3 n\u0103ng ph\u00e1t tri\u1ec3n c\u1ee7a lo\u00e0i S\u00e2u r\u00f3m th\u00f4ng l\u00e0m c\u01a1 s\u1edf \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng tr\u00e1nh k\u1ecbp th\u1eddi c\u00f3 \u00fd ngh\u0129a r\u1ea5t quan tr\u1ecdng cho huy\u1ec7n T\u0129nh Gia. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra cho th\u1ea5y nh\u00f3m y\u1ebfu t\u1ed1 c\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp t\u1edbi sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a S\u00e2u r\u00f3m th\u00f4ng g\u1ed3m c\u00e1c y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed9 \u1ea9m, th\u1ee9c \u0103n, h\u01b0\u1edbng ph\u01a1i v\u00e0 \u0111\u1ed9 cao. Y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1ed9 l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t v\u00ec n\u00f3 thay \u0111\u1ed5i qua c\u00e1c th\u00e1ng trong n\u0103m v\u00e0 qua c\u00e1c n\u0103m, c\u00e1c y\u1ebfu t\u1ed1 c\u00f2n l\u1ea1i kh\u00f4ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i l\u1edbn. V\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ArcGIS 10.2 th\u00f4ng qua vi\u1ec7c ch\u1ed3ng x\u1ebfp l\u1edbp b\u1ea3n \u0111\u1ed3, nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e1c \u0111\u1ecbnh v\u00f9ng c\u00f3 m\u1eadt \u0111\u1ed9 S\u00e2u r\u00f3m th\u00f4ng cao t\u1ea1i khu v\u1ef1c nghi\u00ean c\u1ee9u. K\u1ebft qu\u1ea3 cho th\u1ea5y t\u00ecnh h\u00ecnh ph\u00e1t sinh ph\u00e1t tri\u1ec3n c\u1ee7a S\u00e2u r\u00f3m th\u00f4ng \u0111ang \u1edf ng\u01b0\u1ee1ng an to\u00e0n kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng b\u00f9ng ph\u00e1t th\u00e0nh d\u1ecbch. Di\u1ec7n t\u00edch c\u00f3 m\u1eadt \u0111\u1ed9 S\u00e2u r\u00f3m th\u00f4ng cao ch\u1ec9 chi\u1ebfm t\u1ef7 l\u1ec7 nh\u1ecf v\u1edbi 2,7%, di\u1ec7n t\u00edch kh\u00f4ng c\u00f3 S\u00e2u r\u00f3m th\u00f4ng c\u00f3 t\u1ef7 l\u1ec7 cao v\u1edbi 70,4%. K\u1ebft qu\u1ea3 n\u00e0y l\u00e0 c\u01a1 s\u1edf cho vi\u1ec7c d\u1ef1 b\u00e1o kh\u1ea3 n\u0103ng x\u1ea3y ra d\u1ecbch S\u00e2u r\u00f3m th\u00f4ng n\u0103m k\u1ebf ti\u1ebfp trong b\u1ed1i c\u1ea3nh nhi\u1ec7t \u0111\u1ed9 Tr\u00e1i \u0111\u1ea5t \u0111ang \u1ea5m d\u1ea7n l\u00ean, \u0111\u00f3 l\u00e0 \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 S\u00e2u r\u00f3m th\u00f4ng ph\u00e1t tri\u1ec3n m\u1ea1nh.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>B\u1ea3n \u0111\u1ed3 ph\u00e2n v\u00f9ng, d\u1ecbch s\u00e2u r\u00f3m th\u00f4ng, GIS, huy\u1ec7n T\u0129nh Gia, vi\u1ec5n th\u00e1m, Thanh H\u00f3a<\/p>\n

 <\/td>\n<\/tr>\n

\n

Application of gis and remote sensing to regionalise the pinus caterpillar (Dendrolimus punctatus<\/i>) in Tinh Gia district, Thanh Hoa province<\/strong><\/p>\n

Pinus merkusii<\/i> is one of highly economic value species and its resin is used in many industries. A large-scale plantation of single pine species poses a high risk of epidemic outbreak of pest and disease in Tinh Gia, Thanh Hoa province. Therefore, pest and disease control is essential in the study site. Caterpillars mostly harm pine species, their ability to rapid reproduction and short time growth may lead to extremely destructive consequences of pine forests. Using GIS and remote sensing technologies to regionalize favourable zones of pine caterpillar development is crucial to drive timely prevention measures of widespread epidemics for Tinh Gia district. The results show that a group of factors which directly affect the growth and development of pine caterpillars include temperature, humidity, food, sunlight and elevation. In particular, the temperature factor is one of the most important and influential factors as it changes monthly and yearly, while other remaining factors are less influential and unlikely to change over the time. Moreover, the study has identified the location with a high-density caterpillar in Tinh Gia district by using overlaying approaches in ArcGIS 10.2. More importantly, findings show that the state of pine caterpillar development is at a safe level and is unlikely to be a widespread occurrence of any outbreak in 2015. The highly dense populated areas account for only a small percentage of 2.7% of total of studied areas, while there is largely 70.4% of the area without facing a risk of widespread occurrence of pine epidemic outbreak. This result provides a scientific basis for forecasting the possible occurrence of epidemic pine caterpillar in coming years under the context of global warming, which temperature factor is influential to a epidemic breakout of pine caterpillar.<\/p>\n

Keywords:<\/i><\/b> <\/i>Caterpillar, epidemic outbreak, GIS, pine, remote sensing, Tinh Gia district, Thanh Hoa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00c1C NH\u00c2N T\u1ed0 \u1ea2NH H\u01af\u1edeNG V\u00c0 GI\u1ea2I PH\u00c1P HO\u00c0N THI\u1ec6N M\u00d4 H\u00ccNH LI\u00caN K\u1ebeT THEO NH\u00d3M H\u1ed8 TR\u1ed2NG R\u1eeaNG T\u1ea0I VI\u1ec6T NAM<\/p>\n

Ho\u00e0ng Li\u00ean S\u01a1n, Ph\u1ea1m Th\u1ecb Luy\u1ec7n, Nguy\u1ec5n Gia Ki\u00eam<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u Kinh t\u1ebf L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTM\u00f4 h\u00ecnh li\u00ean k\u1ebft theo nh\u00f3m h\u1ed9 tr\u1ed3ng r\u1eebng \u0111\u01b0\u1ee3c \u0111i\u1ec1u tra t\u1ea1i c\u00e1c t\u1ec9nh Ph\u00fa Th\u1ecd, Qu\u1ea3ng Tr\u1ecb, Qu\u1ea3ng Nam v\u00e0 B\u00ecnh \u0110\u1ecbnh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng, m\u00f4 h\u00ecnh li\u00ean k\u1ebft theo nh\u00f3m h\u1ed9 tr\u1ed3ng r\u1eebng l\u00e0 kh\u00e1 \u0111a d\u1ea1ng, v\u1edbi c\u00e1c c\u1ea5p \u0111\u1ed9 kh\u00e1c nhau t\u1eeb \u0111\u01a1n gi\u1ea3n, l\u1ecfng l\u1ebbo, nh\u01b0 m\u00f4 h\u00ecnh li\u00ean k\u1ebft t\u1ea1i Ph\u00fa Th\u1ecd, \u0111\u1ebfn c\u1ea5p \u0111\u1ed9 cao h\u01a1n v\u00e0 ch\u1eb7t ch\u1ebd h\u01a1n nh\u01b0 m\u00f4 h\u00ecnh li\u00ean k\u1ebft nh\u00f3m h\u1ed9 tr\u1ed3ng r\u1eebng FSC t\u1ea1i c\u00e1c t\u1ec9nh Qu\u1ea3ng Tr\u1ecb, Qu\u1ea3ng Nam v\u00e0 B\u00ecnh \u0110\u1ecbnh. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch, \u0111\u00e1nh gi\u00e1 c\u00e1c nh\u00e2n t\u1ed1 b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u00f4 h\u00ecnh li\u00ean k\u1ebft theo nh\u00f3m h\u1ed9 tr\u1ed3ng r\u1eebng \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng, \u0111\u1ec3 c\u00e1c nh\u00f3m h\u1ed9 n\u00e0y c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i v\u00e0 ph\u00e1t tri\u1ec3n \u0111\u01b0\u1ee3c, tr\u01b0\u1edbc h\u1ebft c\u1ea7n c\u00f3 h\u1ec7 th\u1ed1ng ch\u00ednh s\u00e1ch \u0111\u1ed3ng b\u1ed9, s\u1ef1 quan t\u00e2m v\u00e0 v\u00e0o cu\u1ed9c c\u1ee7a ch\u00ednh quy\u1ec1n \u0111\u1ecba ph\u01b0\u01a1ng, c\u1ee7a c\u00e1c t\u1ed5 ch\u1ee9c x\u00e3 h\u1ed9i trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng cho s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a nh\u00f3m h\u1ed9 ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u c\u1ee7a th\u1ef1c ti\u1ec5n. \u0110\u1ed3ng th\u1eddi, b\u1ea3n th\u00e2n n\u1ed9i l\u1ef1c c\u1ee7a nh\u00f3m h\u1ed9 ph\u1ea3i bi\u1ebft v\u01b0\u01a1n l\u00ean. \u0110\u00e2y ch\u00ednh l\u00e0 s\u1ef1 nh\u1eadn th\u1ee9c c\u1ee7a c\u00e1 nh\u00e2n HG\u0110 v\u1ec1 l\u1ee3i \u00edch c\u1ee7a nh\u00f3m h\u1ed9 tr\u1ed3ng r\u1eebng \u0111\u1ec3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c m\u1ed1i li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd trong nh\u00f3m h\u1ed9 th\u00f4ng qua nh\u1eefng r\u00e0ng bu\u1ed9c ch\u1eb7t ch\u1ebd (quy ch\u1ebf c\u1ee7a nh\u00f3m); \u0111\u00f3ng qu\u1ef9 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nh\u00f3m, t\u1ed5 ch\u1ee9c qu\u1ea3n l\u00fd trong nh\u00f3m hi\u1ec7u qu\u1ea3.<\/td>\n<\/tr>\n
\n

Affecting factors and solutions to complete the partnership model of the household groups in tree planting of Vietnam<\/strong><\/p>\n

Partnership model based on household group in tree planting was surveyed in Phu Tho, Quang Tri, Quang Nam and Binh Dinh. The research results show that the model is quite diversified, with different association levels ranging from simple, loose as the model in Phu Tho to the higher level and stricter performance of the FSC partnership model in Quang Tri, Quang Nam and Binh Dinh. The results of the analysis and assessment of internal and external factors is affecting the model. It has shown that these household groups could be formed and developed by supporting of the system of policy, the interest and the participation of local authorities and social organizations at local and international level to orient the development of household groups in accordance with the requirements of reality. At the same time, the internal strength of the household group itself must be very important to raiseawareness of the household on the benefits of the partnership model to build strong linkages within the household groups through strong rules; fund raising to maintain the activities of the model and organize in effective way of the partnership model.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U THI\u1ebeT K\u1ebe, CH\u1ebe T\u1ea0O THI\u1ebeT B\u1eca CH\u01afNG C\u1ea4T TINH D\u1ea6U H\u1ed2I T\u1eea C\u00c0NH L\u00c1<\/p>\n

V\u0169 Th\u1ecb Ho\u00e0ng Ph\u01b0\u01a1ng, Nguy\u1ec5n V\u0103n D\u01b0\u1ee1ng<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u L\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7 – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeTThi\u1ebft b\u1ecb ch\u01b0ng c\u1ea5t tinh d\u1ea7u H\u1ed3i t\u1eeb c\u00e0nh l\u00e1 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf, ch\u1ebf t\u1ea1o v\u1edbi nguy\u00ean l\u00fd l\u00e0m vi\u1ec7c v\u00e0 k\u1ebft c\u1ea5u ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m nguy\u00ean li\u1ec7u v\u00e0 \u0111i\u1ec1u ki\u1ec7n s\u1ea3n xu\u1ea5t t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng. Thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng theo ph\u01b0\u01a1ng ph\u00e1p ch\u01b0ng c\u1ea5t b\u1eb1ng h\u01a1i n\u01b0\u1edbc c\u00f3 h\u1ed3i l\u01b0u d\u1ecbch ng\u01b0ng. B\u1ed9 ph\u1eadn l\u00e0m l\u1ea1nh theo ki\u1ec3u \u1ed1ng ch\u00f9m, g\u1ed3m 37 \u1ed1ng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 21mm, thi\u1ebft di\u1ec7n b\u1ec1 m\u1eb7t trao \u0111\u1ed5i nhi\u1ec7t 5,5m2<\/sup>, v\u1eeba c\u00f3 k\u1ebft c\u1ea7u g\u1ecdn nh\u1eb9, t\u0103ng t\u1ed1i \u0111a kh\u1ea3 n\u0103ng t\u00e1ch pha d\u1ea7u\/n\u01b0\u1edbc, \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u n\u00e2ng cao hi\u1ec7u su\u1ea5t ch\u01b0ng c\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m tinh d\u1ea7u. K\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m trong \u0111i\u1ec1u ki\u1ec7n s\u1ea3n xu\u1ea5t cho th\u1ea5y thi\u1ebft b\u1ecb l\u00e0m vi\u1ec7c \u1ed5n \u0111\u1ecbnh, hi\u1ec7u su\u1ea5t ch\u01b0ng c\u1ea5t 1,04%, h\u00e0m l\u01b0\u1ee3ng trans – anethol t\u1ed1i \u0111a 78%, c\u00e1c ch\u1ec9 ti\u00eau n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m \u0111\u1ea1t so v\u1edbi y\u00eau c\u1ea7u. M\u1eabu thi\u1ebft b\u1ecb g\u00f3p ph\u1ea7n n\u00e2ng cao hi\u1ec7u qu\u1ea3 ch\u1ebf bi\u1ebfn s\u1ea3n ph\u1ea9m l\u00e2m s\u1ea3n ngo\u00e0i g\u1ed7.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/i>Thi\u1ebft b\u1ecb ch\u01b0ng c\u1ea5t tinh d\u1ea7u H\u1ed3i t\u1eeb l\u00e1, trans – anethol, h\u1ed3i l\u01b0u d\u1ecbch ng\u01b0ng<\/td>\n<\/tr>\n

\n

An attemp in design and assembly of star anise distillation equipment<\/strong><\/p>\n

The distillation equipment for branches, leaves of Star anised was designed and manufactured to match the material and working practices in mountainous region. The operation principle was water distillation with reflux of condensate. Cooling unit was shell and tubes heat exchange type, consisted of 37 tubes, total cooling surface area 5.5m2<\/sup>. Its had both compact construction and good efficiency of water\/oil phase separation, assuring high distillation capacity and essential oil quality. In the preliminary test, the equipment operated effectively, the average output was 1.04%, trans – anethol content in essential oil reached 78%. The equipment could contribute increasing the usage of non – timber forest products manufacture.<\/p>\n

Keywords:<\/i><\/b> <\/i>Distillation equipment for branches, leaves of star anise, trans – anethol, reflux condensate<\/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 2 – 2017 \u00a0 \u00a01. Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh\u00a0 c\u00e2y \u01af\u01a1i (Scaphium macropodum (Miq))\u00a0 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p chi\u1ebft c\u00e0nh \u0110o\u00e0n \u0110\u00ecnh Tam L\u00ea Qu\u1ed1c Huy V\u0169 Qu\u00fd \u0110\u00f4ng Research on clonal propagation of Scaphium macropodum (Miq) using marcotting method 3 2. Ki\u1ec3m nghi\u1ec7m ph\u1ea9m ch\u1ea5t gieo […]<\/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\/1566"}],"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=1566"}],"version-history":[{"count":4,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1566\/revisions"}],"predecessor-version":[{"id":1692,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1566\/revisions\/1692"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}