{"id":13091,"date":"2014-06-16T10:11:12","date_gmt":"2014-06-16T03:11:12","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=13091"},"modified":"2014-06-16T10:14:55","modified_gmt":"2014-06-16T03:14:55","slug":"nghien-cuu-dac-diem-lam-hoc-mot-so-he-sinh-thai-rung-chu-yeu-o-viet-nam-2","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-dac-diem-lam-hoc-mot-so-he-sinh-thai-rung-chu-yeu-o-viet-nam-2\/","title":{"rendered":"Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc m\u1ed9t s\u1ed1 h\u1ec7 sinh th\u00e1i r\u1eebng ch\u1ee7 y\u1ebfu \u1edf vi\u1ec7t nam"},"content":{"rendered":"

Tr\u1ea7n V\u0103n Con<\/i><\/p>\n

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

\u00a0\u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/b><\/p>\n

S\u1ef1 th\u00e0nh c\u00f4ng trong qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh x\u1ea9y ra trong c\u00e1c h\u1ec7 sinh th\u00e1i r\u1eebng (HSTR) v\u00e0 c\u00e1c ph\u1ea3n \u1ee9ng c\u1ee7a ch\u00fang \u0111\u1ed1i v\u1edbi c\u00e1c t\u00e1c \u0111\u1ed9ng l\u00e2m sinh. R\u1eebng t\u1ef1 nhi\u00ean \u1edf Vi\u1ec7t Nam \u0111\u00e3 \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd t\u1eeb h\u01a1n 40 n\u0103m nay, nh\u01b0ng nh\u1eefng hi\u1ec3u bi\u1ebft v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh sinh th\u00e1i c\u1ee7a r\u1eebng v\u1eabn c\u00f2n r\u1ea5t h\u1ea1n ch\u1ebf do thi\u1ebfu c\u00e1c s\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp t\u1eeb h\u1ec7 th\u1ed1ng \u00f4 ti\u00eau chu\u1ea9n \u0111\u1ecbnh v\u1ecb (\u00d4TC\u0110V). H\u1ec7 th\u1ed1ng \u00d4TC\u0110V l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft cho vi\u1ec7c t\u00ecm hi\u1ec3u ba v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng l\u00e0m c\u01a1 s\u1edf cho qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng, \u0111\u00f3 l\u00e0: (i) quy lu\u1eadt t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng k\u00ednh khai th\u00e1c t\u1ed1i thi\u1ec3u v\u00e0 lu\u00e2n k\u1ef3 khai th\u00e1c h\u1ee3p l\u00fd; (ii) l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng s\u1ea3n l\u01b0\u1ee3ng r\u1eebng l\u00e0m c\u01a1 s\u1edf t\u00ednh to\u00e1n l\u01b0\u1ee3ng khai th\u00e1c cho ph\u00e9p h\u00e0ng n\u0103m v\u00e0 (iii) \u0111\u1ed9ng th\u00e1i c\u1ea5u tr\u00fac l\u00e2m ph\u1ea7n \u0111\u1ec3 d\u1ef1 b\u00e1o c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ee7a r\u1eebng trong t\u01b0\u01a1ng lai.<\/p>\n

C\u00e1c nghi\u00ean c\u01b0 d\u1ef1a tr\u00ean h\u1ec7 th\u1ed1ng \u00f4 ti\u00eau chu\u1ea9n t\u1ea1m th\u1eddi v\u00e0 gi\u1ea3i t\u00edch th\u00e2n c\u00e2y \u0111\u00e3 b\u1ed9c l\u1ed9 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p c\u00e1c s\u1ed1 li\u1ec7u \u0111\u00e1ng tin c\u1eady cho nghi\u00ean c\u1ee9u c\u00e1c qu\u00e1 tr\u00ecnh \u0111\u1ed9ng th\u00e1i c\u1ee7a c\u00e1c HSTR, v\u00ec v\u1eady vi\u1ec7c thi\u1ebft l\u1eadp h\u1ec7 th\u1ed1ng \u00f4 ti\u00eau chu\u1ea9n \u0111\u1ecbnh v\u1ecb (\u00d4TC\u0110V) kh\u00f4ng ch\u1ec9 l\u00e0 c\u1ea7n thi\u1ebft v\u00e0 c\u00f3 \u00fd ngh\u0129a l\u1edbn trong vi\u1ec7c x\u00e2y d\u1ef1ng c\u01a1 s\u1edf v\u1eadt ch\u1ea5t k\u1ef9 thu\u1eadt l\u00e2u d\u00e0i \u0111\u1ec3 nghi\u00ean c\u1ee9u v\u1ec1 r\u1eebng t\u1ef1 nhi\u00ean. T\u1eeb \u0111\u00f3 t\u1eebng b\u01b0\u1edbc ho\u00e0n thi\u1ec7n th\u00eam ki\u1ebfn th\u1ee9c l\u00e2m h\u1ecdc v\u1ec1 c\u00e1c HSTR t\u1ef1 nhi\u00ean v\u00e0 cung c\u1ea5p c\u01a1 s\u1edf khoa h\u1ecdc quan tr\u1ecdng cho vi\u1ec7c \u0111\u1ec1 xu\u1ea5t, x\u00e2y d\u1ef1ng c\u00e1c gi\u1ea3i ph\u00e1p l\u00e2m sinh nh\u1eb1m n\u00e2ng cao s\u1ea3n l\u01b0\u1ee3ng, ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng v\u00e0 ch\u1ee9c n\u0103ng \u0111a m\u1ee5c \u0111\u00edch c\u1ee7a r\u1eebng.<\/p>\n

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

M\u1ee4C TI\u00caU, N\u1ed8I DUNG V\u00c0 PH\u01af\u01a0NG PH\u00c1P NGHI\u00caN C\u1ee8U<\/b><\/p>\n

M\u1ee5c ti\u00eau, n\u1ed9i dung nghi\u00ean c\u1ee9u<\/b><\/p>\n

\u0110\u1ec1 t\u00e0i nh\u1eb1m m\u1ee5c ti\u00eau x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng \u00d4TC\u0110V \u0111\u1ec3:<\/p>\n

(i)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Nghi\u00ean c\u1ee9u ph\u00e2n t\u00edch th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng bao g\u1ed3m c\u1ea5u tr\u00fac, t\u1ed5 th\u00e0nh lo\u00e0i v\u00e0 \u0111a d\u1ea1ng sinh h\u1ecdc;<\/p>\n

(ii)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Nghi\u00ean c\u1ee9u c\u00e1c qu\u00e1 tr\u00ecnh \u0111\u1ed9ng th\u00e1i: sinh tr\u01b0\u1edfng, ch\u1ebft v\u00e0 t\u00e1i sinh b\u1ed5 sung;<\/p>\n

(iii)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Nghi\u00ean c\u1ee9u chu tr\u00ecnh dinh d\u01b0\u1ee1ng nh\u01b0 v\u1eadt r\u01a1i r\u1ee5ng, t\u00edch l\u0169y v\u00e0 ph\u00e2n h\u1ee7y, th\u00e0nh ph\u00e2n dinh d\u01b0\u1ee1ng c\u1ee7a \u0111\u1ea5t v\u00e0 \u0111\u1ed9ng th\u00e1i\u2026;<\/p>\n

(iv)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Sinh th\u00e1i lo\u00e0i; v\u00e0<\/p>\n

(v)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00e1c \u0111\u1eb7c t\u00ednh l\u00e2m h\u1ecdc kh\u00e1c<\/p>\n

C\u1ee7a 4 ki\u1ec3u r\u1eebng ch\u1ee7 y\u1ebfu \u1edf Vi\u1ec7t Nam l\u00e0 r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh, r\u1eebng kh\u1ed9p, r\u1eebng ng\u1eadp m\u1eb7n v\u00e0 r\u1eebng ng\u1eadp ph\u00e8n.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/b><\/p>\n

Con \u0111\u01b0\u1eddng t\u1ed1t nh\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 nghi\u00ean c\u1ee9u m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ef1c k\u1ef3 ph\u1ee9c t\u1ea1p v\u00e0 \u00edt \u0111\u01b0\u1ee3c hi\u1ec3u bi\u1ebft nh\u01b0 r\u1eebng v\u00e0 \u0111\u1eddi s\u1ed1ng c\u1ee7a n\u00f3, theo ch\u00fang t\u00f4i l\u00e0 ph\u1ea3i ph\u00e2n c\u1ea5p h\u1ec7 th\u1ed1ng t\u1eeb c\u00e1i \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn c\u00e1i ph\u1ee9c t\u1ea1p. Sau khi x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u0111\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u c\u1ee7a l\u00e2m h\u1ecdc l\u00e0 h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p t\u1eeb: C\u00e2y \u2013 L\u00e2m ph\u1ea7n – HST r\u1eebng- V\u1ed1n r\u1eebng t\u1ed5ng th\u1ec3. Theo quan \u0111i\u1ec3m c\u1ee7a nh\u1eadn th\u1ee9c lu\u1eadn th\u00ec c\u00e1c qui lu\u1eadt \u0111\u00fang v\u1edbi c\u00e1c c\u1ea5p th\u1ea5p c\u1ee7a h\u1ec7 th\u1ed1ng c\u0169ng \u0111\u00fang v\u1edbi c\u00e1c c\u1ea5p c\u00f3 t\u1ed5 ch\u1ee9c cao h\u01a1n. V\u00ed d\u1ee5: c\u00e1c qui lu\u1eadt sinh tr\u01b0\u1edfng, c\u00e1c t\u01b0\u01a1ng quan gi\u1eefa c\u00e2y v\u00e0 l\u1eadp \u0111\u1ecba… \u0111\u00fang v\u1edbi t\u1eebng c\u00e2y ri\u00eang l\u1ebb th\u00ec c\u0169ng \u0111\u00fang v\u1edbi l\u00e2m ph\u1ea7n. Tuy nhi\u00ean, trong l\u00e2m ph\u1ea7n, do \u1ea3nh h\u01b0\u1edfng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c c\u00e2y c\u00e1 th\u1ec3 v\u1edbi nhau m\u00e0 c\u00f3 th\u00eam c\u00e1c qui lu\u1eadt m\u1edbi ri\u00eang cho t\u1eebng l\u00e2m ph\u1ea7n. Th\u00f4ng qua k\u1ebft c\u1ea5u t\u1ed5 ch\u1ee9c kh\u00f4ng gian v\u00e0 th\u1eddi gian c\u1ee7a c\u00e1c l\u00e2m ph\u1ea7n, t\u1ee9c l\u00e0 s\u1ef1 s\u1eafp x\u1ebfp b\u00ean c\u1ea1nh nhau c\u1ee7a c\u00e1c l\u00e2m ph\u1ea7n trong kh\u00f4ng gian v\u00e0 s\u1ef1 k\u1ebf ti\u1ebfp nhau v\u1ec1 th\u1eddi gian m\u00e0 xu\u1ea5t hi\u1ec7n th\u00eam nh\u1eefng qui lu\u1eadt m\u1edbi c\u00f3 t\u1ed5 ch\u1ee9c cao h\u01a1n trong c\u00e1c HST r\u1eebng v\u00e0 v\u1ed1n r\u1eebng t\u1ed5ng th\u1ec3. \u0110\u00e2y ch\u00ednh l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 ch\u00fang ta x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng l\u00fd thuy\u1ebft c\u1ee7a khoa h\u1ecdc l\u00e2m nghi\u1ec7p n\u00f3i chung v\u00e0 l\u00e2m h\u1ecdc n\u00f3i ri\u00eang.<\/p>\n

C\u00e1c quan \u0111i\u1ec3m nghi\u00ean c\u1ee9u, c\u01a1 s\u1edf ph\u01b0\u01a1ng ph\u00e1p lu\u1eadn, ti\u1ebfp c\u1eadn HST, quan ni\u1ec7m v\u1ec1 r\u1eebng \u0111\u00e3 \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y kh\u00e1 chi ti\u1ebft trong m\u1ed9t chuy\u00ean \u0111\u1ec1 ri\u00eang (xem trong: Nghi\u00ean c\u1ee9u c\u00e1c HST r\u1eebng ch\u1ee7 y\u1ebfu c\u1ee7a Vi\u1ec7t Nam-T\u1ed5ng quan, quan \u0111i\u1ec3m, ph\u01b0\u01a1ng ph\u00e1p v\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u).<\/p>\n

T\u1eeb c\u00e1c c\u01a1 s\u1edf ph\u01b0\u01a1ng ph\u00e1p lu\u1eadn tr\u00ecnh b\u00e0y \u0111\u00f3, ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn nghi\u00ean c\u1ee9u trong \u0111\u1ec1 t\u00e0i n\u00e0y \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0: ti\u1ebfp c\u1eadn HST tr\u00ean c\u01a1 s\u1edf k\u1ebft h\u1ee3p c\u00e1c quan \u0111i\u1ec3m sinh th\u00e1i c\u00e1 th\u1ec3 v\u00e0 sinh th\u00e1i qu\u1ea7n th\u1ec3. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u \u0111\u1ecbnh v\u1ecb c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p: C\u00c2Y C\u00c1 TH\u1ec2 <\/b>\u00e0<\/b> L\u00c2M PH\u1ea6N (l\u00e2m h\u00ecnh) <\/b>\u00e0<\/b> H\u1ec6 SINH TH\u00c1I.<\/b><\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 l\u1ef1a ch\u1ecdn 4 ki\u1ec3u r\u1eebng ch\u1ee7 y\u1ebfu \u0111\u1ec3 nghi\u00ean c\u1ee9u \u1edf c\u00e1c \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u sau<\/p>\n

1. R\u1eebng k\u00edn l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh m\u01b0a \u1ea9m nhi\u1ec7t \u0111\u1edbi: \u0110am R\u00f4ng (L\u00e2m \u0110\u1ed3ng); Kon H\u00e0 N\u1eebng (Gia Lai); An Nh\u01a1n (B\u00ecnh \u0110\u1ecbnh); V\u0169 Quang (H\u00e0 T\u0129nh); Hang Kia-P\u00e0 C\u00f2 (H\u00f2a B\u00ecnh), Xu\u00e2n S\u01a1n (Ph\u00fa Th\u1ecd) v\u00e0 Ba B\u1ec3 (B\u1eafc C\u1ea1n).<\/p>\n

2. R\u1eebng th\u01b0a l\u00e1 r\u1ed9ng r\u1ee5ng l\u00e1 theo m\u00f9a (r\u1eebng kh\u1ed9p): Yok \u0110\u00f4n (\u0110ak Lak).<\/p>\n

3. R\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh ng\u1eadp m\u1eb7n: Xu\u00e2n Th\u1ee7y (Nam \u0110\u1ecbnh); \u0110\u1ea5t m\u0169i (C\u00e0 Mau).<\/p>\n

4. R\u1eebng\u00a0 l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh ng\u1eadp ph\u00e8n: U Minh H\u1ea1 (C\u00e0 Mau); U Minh Th\u01b0\u1ee3ng (Ki\u00ean Giang).<\/p>\n

\u00d4TC\u0110V \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp v\u1edbi k\u00edch th\u01b0\u1ee3c 1 ha (100 x100m) v\u00e0 chia l\u00e0m 3 c\u1ea5p: \u00f4 c\u1ea5p A l\u00e0 h\u00ecnh vu\u00f4ng 1 ha \u0111\u1ec3 \u0111o t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y c\u00f3 D1,3<\/sub> t\u1eeb 10 cm tr\u1edf l\u00ean; \u00f4 c\u1ea5p B l\u00e0 m\u1ed9t h\u00ecnh tr\u00f2n di\u1ec7n t\u00edch 707 m2<\/sup>, \u0111\u1ec3 \u0111o \u0111\u1ebfm c\u00e1c c\u00e2y c\u00f3 1cm \u2264D1,3<\/sub> \u226410cm; v\u00e0 \u00f4 c\u1ea5p C l\u00e0 12 h\u00ecnh vu\u00f4ng c\u00f3 di\u1ec7n t\u00edch 4 m2<\/sup> (t\u1ed5ng l\u00e0 48m2<\/sup>) \u0111\u1ec3 \u0111o \u0111\u1ebfm c\u00e2y t\u00e1i sinh c\u00f3 D1,3<\/sub> \u22641cm (Tr\u1ea7n V\u0103n Con v\u00e0 cs, 2010).<\/p>\n

 <\/p>\n

K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U V\u00c0 TH\u1ea2O LU\u1eacN<\/b><\/p>\n

C\u00e1c s\u1ed1 li\u1ec7u ph\u00e2n t\u00edch t\u1eadp h\u1ee3p \u1edf b\u1ea3ng 1 \u0111\u1ebfn 5 cho th\u1ea5y:<\/p>\n

1. HSTR LRTX<\/b> c\u00f3 ph\u00e2n b\u1ed1 r\u1ed9ng kh\u1eafp tr\u00ean ph\u1ea1m vi l\u00e3nh th\u1ed5 Vi\u1ec7t Nam. Trong 5 nh\u00f3m nh\u00e2n t\u1ed1 ph\u00e1t sinh, nh\u00e2n t\u1ed1 kh\u00ed h\u1eadu (l\u01b0\u1ee3ng m\u01b0a v\u00e0 ch\u1ebf \u0111\u1ed9 nhi\u1ec7t \u1ea9m) c\u00f3 vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn s\u1ef1 ph\u00e1t sinh v\u00e0 ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c HSTR LRTX. \u0110\u00e2y l\u00e0 HST c\u00f3 \u0110DSH cao nh\u1ea5t. S\u1ed1 lo\u00e0i c\u00e2y g\u1ed7\u00a0 c\u00f3 D1,3<\/sub>\u226510cm bi\u1ebfn \u0111\u1ed9ng t\u1eeb 17-72 lo\u00e0i\/ha v\u1edbi t\u1ef7 l\u1ec7 h\u1ed7n lo\u00e0i HL t\u1eeb 1\/35-1\/4 (t\u1ee9c l\u00e0 c\u1ee9 4-35 c\u00e2y c\u00e1 th\u1ec3 th\u00ec c\u00f3 1 lo\u00e0i). Tuy nhi\u00ean ch\u1ec9 c\u00f3 t\u1eeb 2-8 lo\u00e0i (kho\u1ea3ng 10-20%) tham gia v\u00e0o c\u1ea5u tr\u00fac t\u1ed5 th\u00e0nh v\u00e0 h\u00ecnh th\u00e0nh c\u00e1c \u01b0u h\u1ee3p ch\u00ednh. C\u1ea5u tr\u00fac t\u1ea7ng t\u00e1n trong r\u1eebng LRTX kh\u00e1 ph\u1ee9c t\u1ea1p. N\u1ebfu k\u1ec3 c\u1ea3 c\u00e2y TS th\u00ec b\u00ecnh qu\u00e2n c\u00f3 kho\u1ea3ng 150 ng\u00e0n c\u00e2y, tuy nhi\u00ean s\u1ed1 c\u00e2y \u0111\u1ea1t \u0111\u1ebfn chi\u1ec1u cao 6m ch\u1ec9 c\u00f2n l\u1ea1i 6,67%; \u0111\u1ea1t \u0111\u1ebfn chi\u1ec1u cao 12m l\u00e0 2,67%; \u0111\u1ea1t \u0111\u1ebfn chi\u1ec1u cao 24m c\u00f2n l\u1ea1i 0,4% v\u00e0 \u0111\u1ea1t t\u1ea7n tr\u00ean c\u1ee7a t\u00e1n r\u1eebng tr\u00ean 24 m ch\u1ec9 c\u00f2n l\u1ea1i 0,1% (t\u1ee9c l\u00e0 kho\u1ea3ng 150 c\u00e2y\/ha). Tuy nhi\u00ean, t\u1ef7 s\u1ed1 t\u1ed5 th\u00e0nh (IV%) c\u1ee7a t\u1ea7ng tr\u00ean l\u1ea1i chi\u1ebfm 40-50%; trong l\u00fac \u0111o t\u1ea7ng gi\u1eefa l\u00e0 32-38% v\u00e0 t\u1ea7ng d\u01b0\u1edbi ch\u1ec9 c\u00f3 12-22%. C\u1ea5u tr\u00fac N\/D c\u1ee7a r\u1eebng l\u00e0 c\u1ea5u tr\u00fac gi\u1ea3m c\u00f3 h\u00ecnh ch\u1eef J l\u1eadt ng\u01b0\u1ee3c c\u00f3 th\u1ec3 m\u00f4 ph\u1ecfng b\u1eb1ng c\u00e1c h\u00e0m Meyer, Weibull v\u00e0\/ho\u1eb7c Kho\u1ea3ng c\u00e1ch. T\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u00e2y r\u1eebng t\u1ef1 nhi\u00ean nh\u00ecn chung l\u00e0 r\u1ea5t ch\u1eadm b\u00ecnh qu\u00e2n kho\u1ea3ng 0,41 cm\/n\u0103m; t\u1ea7ng c\u00e2y \u01b0u th\u1ebf 0,62 cm\/n\u0103m; t\u1ea7ng gi\u1eefa 0,3 cm\/n\u0103m v\u00e0 t\u1ea7ng d\u01b0\u1edbi 0,25 cm\/n\u0103m. \u0110\u1eb7c bi\u1ec7t c\u00f3 r\u1ea5t nhi\u1ec1u lo\u00e0i t\u1ed3n t\u1ea1i h\u00e0ng ch\u1ee5c n\u0103m \u1edf t\u1ea7ng d\u01b0\u1edbi tr\u1ecdng v\u1ecb th\u1ebf b\u1ecb ch\u00e8n \u00e9p kh\u00f4ng sinh tr\u01b0\u1edfng \u0111\u01b0\u1ee3c, nh\u01b0ng c\u0169ng kh\u00f4ng ch\u1ebft \u0111\u1ec3 ch\u1edd c\u01a1 h\u1ed9i c\u00f3 \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng l\u00e0 ph\u00e1t tri\u1ec3n. Sinh tr\u01b0\u1edfng b\u00ecnh qu\u00e2n \u0111\u1ea1t kho\u1ea3ng 5\u00b13 m3<\/sup>\/ha\/n\u0103m. L\u01b0\u1ee3ng VRR t\u01b0\u01a1i b\u00ecnh qu\u00e2n 11,13\u00b13,95 t\/ha ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ec1u trong c\u00e1c th\u00e1ng. Trong c\u00e1c th\u00e1ng m\u00f9a m\u01b0a, nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed trong r\u1eebng v\u00e0 ngo\u00e0i tr\u1ed1ng ch\u00eanh l\u1ec7ch nhau kh\u00f4ng l\u1edbn (t\u1eeb 0,1-0,4o<\/sup>C), trong khi v\u00e0o c\u00e1c th\u00e1ng m\u00f9a kh\u00f4 th\u00ec nhi\u1ec7t \u0111\u1ed9 ngo\u00e0i tr\u1eddi th\u01b0\u1eddng cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 trong r\u1eebng t\u1eeb 1,2-1,5o<\/sup>C.<\/p>\n

2. HSTR r\u1eebng kh\u1ed9p<\/b> ch\u1ec9 ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu \u1edf cao nguy\u00ean Trung ph\u1ea7n t\u1eeb Kon Tum cho \u0111\u1ebfn T\u00e2y Ninh, t\u1eadp Trung \u1edf nam Gia Lai v\u00e0 \u0110ak Lak. Nh\u00e2n t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn s\u1ef1 ph\u00e1t sinh r\u1eebng kh\u1ed9p l\u00e0 ch\u1ebf \u0111\u1ed9 nhi\u1ec7t \u1ea9m kh\u1eafc nghi\u1ec7t v\u00e0 \u0111\u1ea5t \u0111ai c\u1eb1n c\u1ed5i, l\u01b0\u1ee3ng m\u01b0a th\u1ea5p, th\u1eddi gian kh\u00f4 h\u1ea1n k\u00e9o d\u00e0i t\u1eeb 5-6 th\u00e1ng. \u0110DSH th\u1ea5p h\u01a1n so v\u1edbi r\u1eebng LRTX. S\u1ed1 lo\u00e0i c\u00e2y g\u1ed7 c\u00f3 D1,3<\/sub>\u226510cm\u00a0 bi\u1ebfn \u0111\u1ed9ng t\u1eeb 12-27 lo\u00e0i v\u1edbi t\u1ef7 l\u1ec7 h\u1ed7n lo\u00e0i t\u1eeb 1\/137 \u0111\u1ebfn 1\/36. C\u1ea5u tr\u00fac t\u1ea7ng t\u00e1n \u0111\u01a1n gi\u1ea3n, r\u1eebng ch\u1ec9 c\u00f3 hai t\u1ea7ng, m\u1ed9t t\u1ea7ng c\u00e2y g\u1ed7 v\u00e0 m\u1ed9t t\u1ea7ng c\u00e2y b\u1ee5i. Sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng kh\u1ed9p ch\u1eadm h\u01a1n r\u1eebng LRTX, b\u00ecnh qu\u00e2n t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh l\u00e0 0,33 cm\/n\u0103m. T\u0103ng tr\u01b0\u1edfng c\u1ee7a r\u1eebng trung b\u00ecnh 4\u00b12 m3<\/sup>\/ha\/n\u0103m. L\u01b0\u1ee3ng v\u1eadt r\u01a1i rung trung b\u00ecnh l\u00e0 8,48\u00b11,23 t\/ha. Trong c\u00e1c th\u00e1ng m\u00f9a m\u01b0a, nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed ngo\u00e0i tr\u1eddi v\u00e0 trong r\u1eebng kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t (trong r\u1eebng th\u1ea5p h\u01a1n kho\u1ea3ng 0,1o<\/sup>C), nh\u01b0ng trong c\u00e1c th\u00e1ng m\u00f9a kh\u00f4 th\u00ec nhi\u1ec7t \u0111\u1ed9 trong r\u1eebng cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 ngo\u00e0i n\u01a1i tr\u1ed1ng t\u1eeb 0,7-1,7o<\/sup>C. R\u1eebng kh\u1ed9p l\u00e0 sinh c\u1ea3nh c\u1ee7a nhi\u1ec1u lo\u00e0i th\u00fa l\u1edbn c\u00f3 gi\u00e1 tr\u1ecb b\u1ea3o t\u1ed3n cao (\u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c lo\u00e0i \u0103n c\u1ecf). H\u1ec7 c\u00f4n tr\u00f9ng kh\u00f4ng phong ph\u00fa h\u01a1n trong r\u1eebng LRTX, nh\u01b0ng c\u0169ng r\u1ea5t phong ph\u00fa v\u00e0 \u0111a d\u1ea1ng.<\/p>\n

3. HSTR ng\u1eadp m\u1eb7n<\/b>, ph\u00e2n b\u1ed1 d\u1ecdc theo b\u1edd bi\u1ec3n t\u1eeb M\u00f3ng C\u00e1i \u0111\u1ebfn m\u0169i C\u00e0 Mau. Nh\u00e2n t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn s\u1ef1 h\u00ecnh th\u00e0nh v\u00e0 ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c HSTR ng\u1eadp m\u1eb7n l\u00e0 ch\u1ebf \u0111\u1ed9 ng\u1eadp tri\u1ec1u, \u0111\u1ed9 m\u1eb7n v\u00e0 \u0111\u1ed9 th\u00e0nh th\u1ee5c c\u1ee7a \u0111\u1ea5t. \u0110DSH r\u1eebng ng\u1eadp m\u1eb7n c\u0169ng r\u1ea5t phong ph\u00fa tuy kh\u00f4ng b\u1eb1ng r\u1eebng LRTX. C\u00e1c lo\u00e0i c\u00f3 D1,3<\/sub>\u226510cm t\u1eeb 1-12 lo\u00e0i v\u1edbi t\u1ef7 l\u1ec7 h\u1ed7n lo\u00e0i t\u1eeb 1\/530 \u0111\u1ebfn 1\/65. C\u1ea5u tr\u00fac h\u00ecnh th\u00e1i \u0111\u01a1n gi\u1ea3n. TS v\u00e0 ph\u1ee5c h\u1ed3i r\u1eebng ng\u1eadp m\u1eb7n d\u1ec5 h\u01a1n c\u00e1c ki\u1ec3u r\u1eebng tr\u00ean c\u1ea1n. L\u01b0\u1ee3ng VRR c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n\u00a0 7,14 \u00b11,48 t\/ha t\u1eadp trung v\u00e0o c\u00e1c th\u00e1ng 6,7,8 v\u00e0 9. Trong c\u00e1c th\u00e1ng m\u00f9a m\u01b0a, nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed trong r\u1eebng th\u1ea5p h\u01a1n ngo\u00e0i tr\u1eddi 0,1o<\/sup>C, trong c\u00e1c th\u00e1ng m\u00f9a kh\u00f4 t\u1eeb 0,4-0,8o<\/sup>C. R\u1eebng ng\u1eadp m\u1eb7n l\u00e0 sinh c\u1ea3nh c\u1ee7a c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt \u0111\u00e1y v\u00e0 chim. H\u1ec7 c\u00f4n tr\u00f9ng c\u1ee7a r\u1eebng ng\u1eadp m\u1eb7n h\u1ea1n ch\u1ebf h\u01a1n so v\u1edbi c\u00e1c ki\u1ec3u r\u1eebng kh\u00e1c.<\/p>\n

4. HSTR ng\u1eadp ph\u00e8n<\/b> ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu \u1edf v\u00f9ng t\u1ee9 gi\u00e1c Long Xuy\u00ean (\u0111\u00f4ng b\u1eb1ng s\u00f4ng C\u1eedu Long). Nh\u00e2n t\u1ed1 sinh th\u00e1i quy\u1ebft \u0111\u1ecbnh s\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a ki\u1ec3u r\u1eebng n\u00e0y l\u00e0 \u0111\u1ed9 ph\u00e8n trong \u0111\u1ea5t. Ch\u1ec9 c\u00f3 r\u1ea5t \u00edt lo\u00e0i th\u1ef1c v\u1eadt th\u00edch h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba c\u1ee7a v\u00f9ng ng\u1eadp ph\u00e8n, lo\u00e0i ch\u1ee7 y\u1ebfu l\u00e0 Tr\u00e0m. S\u1ed1 lo\u00e0i c\u00e2y g\u1ed7 c\u00f3 D1,3<\/sub>\u226510cm t\u1eeb 1-6 lo\u00e0i v\u1edbi t\u1ef7 l\u1ec7 h\u1ed7n lo\u00e0i t\u1eeb\u00a0 1\/360-1\/140.\u00a0 C\u1ea5u tr\u00fac h\u00ecnh th\u00e1i c\u1ee7a r\u1eebng \u0111\u01a1n gi\u1ea3n, r\u1eebng c\u00f3 hai t\u1ea7ng, h\u1ea7u nh\u01b0 thu\u1ea7n lo\u00e0i. L\u01b0\u1ee3ng VRR c\u1ee7a r\u1eebng ng\u1eadp ph\u00e8n \u0111\u1ea1t trung b\u00ecnh 7,67\u00b11,06 t\/ha. Nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed trong r\u1eebng th\u1ea5p h\u01a1n nhi\u1ec7t \u0111\u1ed9 ngo\u00e0i tr\u1eddi t\u1eeb 0,1 \u0111\u1ebfn 1,2o<\/sup>C. R\u1eebng ng\u1eadp ph\u00e8n l\u00e0 sinh c\u1ea3nh c\u1ee7a h\u1ec7 \u0111\u1ed9ng v\u1eadt v\u00e0 c\u00f4n tr\u00f9ng phong ph\u00fa v\u00e0 \u0111a d\u1ea1ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c lo\u00e0i l\u01b0\u1ee1ng c\u01b0.<\/p>\n

B\u1ea3ng 1. C\u00e1c nh\u00e2n t\u1ed1 ph\u00e1t sinh v\u00e0 v\u00f9ng ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c ki\u1ec3u r\u1eebng ch\u1ee7 y\u1ebfu<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\n

Nh\u00e2n t\u1ed1<\/p>\n<\/td>\n

\n

RLRTX<\/p>\n<\/td>\n

\n

RK<\/p>\n<\/td>\n

\n

RNM<\/p>\n<\/td>\n

\n

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

\n

\u0110\u1ed9 cao (m)<\/p>\n<\/td>\n

\n

<1300<\/p>\n<\/td>\n

\n

400-800<\/p>\n<\/td>\n

\n

<10<\/p>\n<\/td>\n

\n

<2<\/p>\n<\/td>\n<\/tr>\n

\n

Nhi\u1ec7t \u0111\u1ed9 TB: T(o<\/sup>C)<\/p>\n<\/td>\n

\n

20-25<\/p>\n<\/td>\n

\n

25-30<\/p>\n<\/td>\n

\n

15-30<\/p>\n<\/td>\n

\n

24-28<\/p>\n<\/td>\n<\/tr>\n

\n

Th\u1ea5p nh\u1ea5t Tmin(o<\/sup>C)<\/p>\n<\/td>\n

\n

15-20<\/p>\n<\/td>\n

\n

20-25<\/p>\n<\/td>\n

\n

10-15<\/p>\n<\/td>\n

\n

15-20<\/p>\n<\/td>\n<\/tr>\n

\n

L\u01b0\u1ee3ng m\u01b0a P(mm)<\/p>\n<\/td>\n

\n

1800-3000<\/p>\n<\/td>\n

\n

1200-1800<\/p>\n<\/td>\n

\n

1300-2500<\/p>\n<\/td>\n

\n

1500-2400<\/p>\n<\/td>\n<\/tr>\n

\n

S\u1ed1 th\u00e1ng kh\u00f4 h\u1ea1n (a)<\/p>\n<\/td>\n

\n

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

\n

4-6<\/p>\n<\/td>\n

\n

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

\n

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

\n

\u0110\u1ed9 \u1ea9m kh\u00f4ng kh\u00ed H(%)<\/p>\n<\/td>\n

\n

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

\n

80-85<\/p>\n<\/td>\n

\n

80-90<\/p>\n<\/td>\n

\n

75-85<\/p>\n<\/td>\n<\/tr>\n

\n

\u0110\u1ea5t<\/p>\n<\/td>\n

\n

\u0110\u1ea5t \u0111\u1ecba \u0111\u1edbi, feralit, s\u00e9t-c\u00e1t, t\u1ea7ng d\u00e0y, nhi\u1ec1u m\u00f9n, kh\u00f4ng c\u00f3 \u0111\u00e1 ong<\/p>\n<\/td>\n

\n

\u0110\u1ea5t x\u01b0\u01a1ng x\u1ea9u, t\u1ea7ng m\u1ecfng, c\u00f3 l\u1edbp \u0111\u00e1 ong, m\u00f9a kh\u00f4 chai c\u1ee9ng, m\u00f9a m\u01b0a ng\u1eadp \u00fang<\/p>\n<\/td>\n

\n

\u0110\u1ea5t b\u1ed3i t\u1ee5 v\u00e0 tr\u1ea7m t\u00edch b\u00e3i bi\u1ec3n, ng\u1eadp m\u1eb7n<\/p>\n<\/td>\n

\n

\u0110\u1ea5t ph\u00e8n v\u00e0 ph\u00e8n ti\u1ec1m t\u00e0ng, ng\u1eadp \u00fang.<\/p>\n<\/td>\n<\/tr>\n

\n

V\u00f9ng ph\u00e2n b\u1ed1<\/p>\n<\/td>\n

\n

To\u00e0n qu\u1ed1c<\/p>\n<\/td>\n

\n

Cao nguy\u00ean Trung ph\u1ea7n t\u1eeb Kon Tum \u0111\u1ebfn T\u00e2y Ninh, t\u1eadp trung \u1edf Nam Gia Lai v\u00e0 \u0110ak Lak<\/p>\n<\/td>\n

\n

D\u1ecdc theo b\u1edd bi\u1ec3n t\u1eeb M\u00f3ng C\u00e1i \u0111\u1ebfn M\u0169i C\u00e0 Mau<\/p>\n<\/td>\n

\n

\u0110\u1ed3ng b\u1eb1ng Th\u00e1p M\u01b0\u1eddi, T\u1ee9 gi\u00e1c Long Xuy\u00ean, U Minh (h\u1ea1 v\u00e0 th\u01b0\u1ee3ng)<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ea3ng 2. \u0110\u1eb7c tr\u01b0ng c\u1ea5u tr\u00fac c\u1ee7a 4 ki\u1ec3u r\u1eebng nghi\u00ean c\u1ee9u<\/p>\n\n\n\n\n\n\n\n\n\n\n
\n

Ch\u1ec9 ti\u00eau<\/p>\n<\/td>\n

\n

RLRTX<\/p>\n<\/td>\n

\n

RK<\/p>\n<\/td>\n

\n

RNM<\/p>\n<\/td>\n

\n

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

\n

S\u1ed1 lo\u00e0i\/ha<\/p>\n<\/td>\n

\n

17-72<\/p>\n<\/td>\n

\n

12-17<\/p>\n<\/td>\n

\n

1-12<\/p>\n<\/td>\n

\n

1-6<\/p>\n<\/td>\n<\/tr>\n

\n

S\u1ed1 c\u00e2y\/ha<\/p>\n<\/td>\n

\n

560\u00b1350<\/p>\n<\/td>\n

\n

378\u00b1125<\/p>\n<\/td>\n

\n

780\u00b1250<\/p>\n<\/td>\n

\n

640\u00b1300<\/p>\n<\/td>\n<\/tr>\n

\n

HL<\/p>\n<\/td>\n

\n

1\/35-1\/4<\/p>\n<\/td>\n

\n

1\/137-1\/38<\/p>\n<\/td>\n

\n

1\/530-1\/65<\/p>\n<\/td>\n

\n

1\/360-1\/140<\/p>\n<\/td>\n<\/tr>\n

\n

T\u1ed5 th\u00e0nh<\/p>\n<\/td>\n

\n

Ph\u1ee9c h\u1ee3p<\/p>\n<\/td>\n

\n

\u01afu h\u1ee3p h\u1ecd D\u1ea7u<\/p>\n<\/td>\n

\n

\u01afu h\u1ee3p (M\u1eafm, \u0110\u01b0\u1edbc, S\u00fa, V\u1eb9t)<\/p>\n<\/td>\n

\n

\u0110\u01a1n \u01b0u Tr\u00e0m<\/p>\n<\/td>\n<\/tr>\n

\n

T\u1ea7ng t\u00e1n<\/p>\n<\/td>\n

\n

Nhi\u1ec1u t\u1ea7ng<\/p>\n<\/td>\n

\n

1-2 t\u1ea7ng<\/p>\n<\/td>\n

\n

1-2 t\u1ea7ng<\/p>\n<\/td>\n

\n

1 t\u1ea7ng<\/p>\n<\/td>\n<\/tr>\n

\n

Chi\u1ec1u cao t\u00e1n (m)<\/p>\n<\/td>\n

\n

>36<\/p>\n<\/td>\n

\n

\u0110\u1ebfn 30<\/p>\n<\/td>\n

\n

\u0110\u1ebfn 25<\/p>\n<\/td>\n

\n

\u0110\u1ebfn 27<\/p>\n<\/td>\n<\/tr>\n

\n

Ph\u00e2n b\u1ed1 N-D<\/p>\n<\/td>\n

\n

H\u00ecnh ch\u1eef J<\/p>\n<\/td>\n

\n

M\u1ed9t \u0111\u1ec9nh l\u1ec7ch tr\u00e1i<\/p>\n<\/td>\n

\n

M\u1ed9t \u0111\u1ec9nh l\u1ec7ch tr\u00e1i<\/p>\n<\/td>\n

\n

M\u1ed9t \u0111\u1ec9nh l\u1ec7ch tr\u00e1i<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ea3ng 3. M\u1ed9t s\u1ed1 ch\u1ec9 ti\u00eau \u0111\u1ed9ng th\u00e1i t\u00e1i sinh di\u1ec5n th\u1ebf trong c\u00e1c ki\u1ec3u r\u1eebng<\/p>\n

\u0110\u01a1m v\u1ecb: c\u00e2y\/ha<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\n

L\u1edbp c\u00e2y<\/p>\n<\/td>\n

\n

Ch\u1ec9 ti\u00eau<\/p>\n<\/td>\n

\n

RLRTX<\/p>\n<\/td>\n

\n

RK<\/p>\n<\/td>\n

\n

RNM<\/p>\n<\/td>\n

\n

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

CTS<\/td>\nCh\u1ebft<\/td>\n\n

140000\u00b150000<\/p>\n<\/td>\n

\n

7926\u00b12280<\/p>\n<\/td>\n

\n

25000\u00b19500<\/p>\n<\/td>\n

\n

22800\u00b18900<\/p>\n<\/td>\n<\/tr>\n

B\u1ed5 sung<\/td>\n\n

139000\u00b178000<\/p>\n<\/td>\n

\n

8715\u00b11428<\/p>\n<\/td>\n

\n

25500\u00b112000<\/p>\n<\/td>\n

\n

22900\u00b111500<\/p>\n<\/td>\n<\/tr>\n

Chuy\u1ec3n ra<\/td>\n\n

165\u00b155<\/p>\n<\/td>\n

\n

134\u00b148<\/p>\n<\/td>\n

\n

159\u00b162<\/p>\n<\/td>\n

\n

148\u00b155<\/p>\n<\/td>\n<\/tr>\n

TCN<\/td>\nCh\u1ebft<\/td>\n\n

158\u00b176<\/p>\n<\/td>\n

\n

26\u00b129<\/p>\n<\/td>\n

\n

162\u00b175<\/p>\n<\/td>\n

\n

152\u00b156<\/p>\n<\/td>\n<\/tr>\n

B\u1ed5 sung<\/td>\n\n

165\u00b155<\/p>\n<\/td>\n

\n

134\u00b148<\/p>\n<\/td>\n

\n

159\u00b162<\/p>\n<\/td>\n

\n

148\u00b155<\/p>\n<\/td>\n<\/tr>\n

Chuy\u1ec3n ra<\/td>\n\n

22\u00b110<\/p>\n<\/td>\n

\n

11\u00b13<\/p>\n<\/td>\n

\n

24\u00b112<\/p>\n<\/td>\n

\n

22\u00b19<\/p>\n<\/td>\n<\/tr>\n

TCC<\/td>\nCh\u1ebft<\/td>\n\n

18\u00b19<\/p>\n<\/td>\n

\n

9\u00b14<\/p>\n<\/td>\n

\n

23\u00b114<\/p>\n<\/td>\n

\n

19\u00b111<\/p>\n<\/td>\n<\/tr>\n

B\u1ed5 sung<\/td>\n\n

22\u00b110<\/p>\n<\/td>\n

\n

11\u00b13<\/p>\n<\/td>\n

\n

24\u00b112<\/p>\n<\/td>\n

\n

22\u00b19<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ea3ng 4. C\u00e1c ch\u1ec9 ti\u00eau ph\u1ea3n \u00e1nh n\u0103ng su\u1ea5t sinh kh\u1ed1i c\u1ee7a r\u1eebng<\/p>\n\n\n\n\n\n\n\n\n
Ch\u1ec9 ti\u00eau<\/td>\n\n

RLRTX<\/p>\n<\/td>\n

\n

RK<\/p>\n<\/td>\n

\n

RNM<\/p>\n<\/td>\n

\n

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

ZD (cm\/n\u0103m)<\/td>\n\n

0,42\u00b10,20<\/p>\n<\/td>\n

\n

0,34\u00b10,15<\/p>\n<\/td>\n

\n

0,40\u00b10,22<\/p>\n<\/td>\n

\n

0,38\u00b10,15<\/p>\n<\/td>\n<\/tr>\n

G (m2<\/sup>\/ha)<\/td>\n\n

28\u00b119<\/p>\n<\/td>\n

\n

15,9\u00b12,7<\/p>\n<\/td>\n

\n

22\u00b110<\/p>\n<\/td>\n

\n

20\u00b18<\/p>\n<\/td>\n<\/tr>\n

M (m3<\/sup>\/ha)<\/td>\n\n

250\u00b1150<\/p>\n<\/td>\n

\n

100\u00b118<\/p>\n<\/td>\n

\n

150\u00b180<\/p>\n<\/td>\n

\n

145\u00b195<\/p>\n<\/td>\n<\/tr>\n

ZM (m3<\/sup>\/ha\/n\u0103m)<\/td>\n\n

5\u00b13<\/p>\n<\/td>\n

\n

3\u00b12<\/p>\n<\/td>\n

\n

4\u00b12<\/p>\n<\/td>\n

\n

4\u00b11,5<\/p>\n<\/td>\n<\/tr>\n

VRR (t\/ha\/n\u0103m)<\/td>\n\n

11,5\u00b14,0<\/p>\n<\/td>\n

\n

8,5\u00b11,2<\/p>\n<\/td>\n

\n

7,1\u00b11,5<\/p>\n<\/td>\n

\n

7,7\u00b11,1<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ea3ng 5. Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa ngo\u00e0i trong v\u00e0 trong r\u1eebng<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\n

Lo\u1ea1i r\u1eebng<\/p>\n<\/td>\n

\n

M\u00f9a<\/p>\n<\/td>\n

\n

Ch\u00eanh l\u1ec7ch<\/p>\n<\/td>\n<\/tr>\n

R\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh<\/td>\nM\u00f9a m\u01b0a<\/td>\n\n

0,1-0,4o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n

M\u00f9a kh\u00f4<\/td>\n\n

1,2-1,5o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n

R\u1eebng kh\u1ed9p<\/td>\nM\u00f9a m\u01b0a<\/td>\n\n

0,1o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n

M\u00f9a kh\u00f4<\/td>\n\n

-0,7 – -1,7o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n

R\u1eebng ng\u1eadp m\u1eb7n<\/td>\nM\u00f9a m\u01b0a<\/td>\n\n

0,1o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n

M\u00f9a kh\u00f4<\/td>\n\n

0,4-0,8o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n

R\u1eebng ng\u1eadp ph\u00e8n<\/td>\nM\u00f9a m\u01b0a<\/td>\n\n

0,1o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n

M\u00f9a kh\u00f4<\/td>\n\n

1,2o<\/sup>C<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

K\u1ebeT LU\u1eacN V\u00c0 KHUY\u1ebeN NGH\u1eca<\/b><\/p>\n

K\u1ebft lu\u1eadn<\/b><\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S\u1ed1 li\u1ec7u thu th\u1eadp t\u1eeb h\u1ec7 th\u1ed1ng \u00d4TC\u0110V cung c\u1ea5p nh\u1eefng ph\u00e1t hi\u1ec7n quan trong v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh \u0111\u1ed9ng th\u00e1i trong c\u00e1c h\u1ec7 sinh th\u00e1i r\u1eebng \u0111\u01b0\u1ee3c t\u1eadp h\u1ee3p \u1edf c\u00e1c b\u1ea3ng 1-5.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 D\u1eef li\u1ec7u thu th\u1eadp t\u1eeb h\u1ec7 th\u1ed1ng \u00d4TC\u0110V kh\u00f4ng nh\u1eefng quan trong \u0111\u1ec3 ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a h\u1ec7 sinh th\u00e1i r\u1eebng m\u00e0 c\u00f2n c\u00f3 vai tr\u00f2 quan trong trong t\u01b0\u01a1ng lai khi nghi\u00ean c\u1ee9u v\u00e0 ki\u1ec3m so\u00e1t c\u00e1c d\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng c\u1ee7a r\u1eebng nh\u01b0 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon \u1ee9ng ph\u00f3 v\u1edbi bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu,\u2026<\/p>\n

Khuy\u1ebfn ngh\u1ecb<\/b><\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0110\u1ea7u t\u01b0 ti\u1ebfp t\u1ee5c \u0111\u1ec3 duy tr\u00ec theo d\u00f5i s\u1ed1 li\u1ec7u tr\u00ean h\u1ec7 th\u1ed1ng \u00d4TC\u0110V \u0111\u00e3 c\u00f3 v\u00e0 m\u1edf r\u1ed9ng th\u00eam cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng kh\u00e1c;<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00f3 c\u01a1 ch\u1ebf chia s\u1ebd th\u00f4ng tin v\u00e0 h\u1ec7 th\u1ed1ng c\u00e1c \u00d4TC\u0110V \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1ec1 t\u00e0i, d\u1ef1 \u00e1n kh\u00e1c \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u1ec3 khai th\u00e1c th\u00f4ng tin hi\u1ec7u qu\u1ea3 cho nghi\u00ean c\u1ee9u khoa h\u1ecdc v\u00e0 qu\u1ea3n l\u00fd ng\u00e0nh.<\/p>\n

 <\/p>\n

T\u00c0I LI\u1ec6U THAM KH\u1ea2O<\/b><\/p>\n

1. Tr\u1ea7n V\u0103n Con v\u00e0 cs, 2006: Nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng c\u00e1c ti\u1ebfn b\u1ed9 khoa h\u1ecdc k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p nh\u1eb1m x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh qu\u1ea3n l\u00fd b\u1ec1n v\u1eefng r\u1eebng t\u1ef1 nhi\u00ean \u1edf T\u00e2y Nguy\u00ean. B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i. Vi\u1ec7n Khoa h\u1ecdc l\u00e2m nghi\u1ec7p, 2006.<\/p>\n

2. Tr\u1ea7n V\u0103n Con v\u00e0 cs, 2010: Nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc (di\u1ec5n th\u1ebf, c\u1ea5u tr\u00fac, t\u1ed5 th\u00e0nh, t\u00e1i sinh, t\u0103ng tr\u01b0\u1edfng, kh\u00ed h\u1eadu thu\u1ef7 v\u0103n, \u0111\u1ea5t,\u2026) c\u1ee7a m\u1ed9t s\u1ed1 h\u1ec7 sinh th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean ch\u1ee7 y\u1ebfu \u1edf Vi\u1ec7t Nam. B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i, 2010.<\/p>\n

3. V\u0169 Ti\u1ebfn Hinh v\u00e0 cs, 2006: Nghi\u00ean c\u1ee9u c\u00e1c gi\u1ea3i ph\u00e1p PHR b\u1eb1ng khoanh nu\u00f4i \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh trung du, mi\u1ec1n n\u00fai ph\u00eda b\u1eafc Vi\u1ec7t Nam. B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i. B\u1ed9 NN &PTNT, 2006.<\/b><\/p>\n

4. Lamprecht, H. 1989: Silviculture in Troppics. Eschborn, 1989<\/p>\n","protected":false},"excerpt":{"rendered":"

Tr\u1ea7n V\u0103n Con Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam \u00a0\u0110\u1eb6T V\u1ea4N \u0110\u1ec0 S\u1ef1 th\u00e0nh c\u00f4ng trong qu\u1ea3n l\u00fd r\u1eebng b\u1ec1n v\u1eefng ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh x\u1ea9y ra trong c\u00e1c h\u1ec7 sinh th\u00e1i r\u1eebng (HSTR) v\u00e0 c\u00e1c ph\u1ea3n \u1ee9ng c\u1ee7a ch\u00fang \u0111\u1ed1i v\u1edbi c\u00e1c t\u00e1c \u0111\u1ed9ng l\u00e2m sinh. R\u1eebng […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13091"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=13091"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13091\/revisions"}],"predecessor-version":[{"id":13095,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13091\/revisions\/13095"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=13091"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=13091"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=13091"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}