{"id":13119,"date":"2014-06-19T10:55:14","date_gmt":"2014-06-19T03:55:14","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=13119"},"modified":"2014-06-16T10:59:19","modified_gmt":"2014-06-16T03:59:19","slug":"ky-thuat-trong-keo-tai-tuong","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ky-thuat-trong-keo-tai-tuong\/","title":{"rendered":"K\u1ef9 thu\u1eadt tr\u1ed3ng Keo tai t\u01b0\u1ee3ng"},"content":{"rendered":"

T\u00ean kh\u00e1c: Keo l\u00e1 to, Keo m\u1ee1<\/p>\n

T\u00ean khoa h\u1ecdc: Acacia mangium <\/i>Wild<\/p>\n

H\u1ecd th\u1ef1c v\u1eadt: Trinh n\u1eef (Mimosaceae)<\/p>\n

1. \u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i<\/b><\/p>\n

C\u00e2y g\u1ed7 trung b\u00ecnh, chi\u1ec1u cao bi\u1ebfn \u0111\u1ed9ng t\u1eeb 7 \u0111\u1ebfn 30 m, \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 25-35cm, \u0111\u00f4i khi tr\u00ean 50 cm. Th\u00e2n th\u1eb3ng, v\u1ecf c\u00f3 m\u00e0u n\u00e2u x\u00e1m \u0111\u1ebfn n\u00e2u, x\u00f9 x\u00ec, c\u00f3 v\u1ebft n\u1ee9t d\u1ecdc. T\u00e1n l\u00e1 xanh quanh n\u0103m, h\u00ecnh tr\u1ee9ng ho\u1eb7c h\u00ecnh th\u00e1p, th\u01b0\u1eddng ph\u00e2n c\u00e0nh cao. C\u00e2y m\u1ea7m giai \u0111o\u1ea1n v\u00e0i th\u00e1ng tu\u1ed5i c\u00f3 l\u00e1 k\u00e9p l\u00f4ng chim 2 l\u1ea7n, cu\u1ed1ng l\u00e1 th\u01b0\u1eddng d\u1eb9t g\u1ecdi l\u00e0 l\u00e1 th\u1eadt, c\u00e1c l\u00e1 ra sau l\u00e0 l\u00e1 \u0111\u01a1n, m\u1ecdc c\u00e1ch, g\u1ecdi l\u00e0 l\u00e1 gi\u1ea3, phi\u1ebfn l\u00e1 h\u00ecnh tr\u1ee9ng ho\u1eb7c tr\u00e1i xoan d\u00e0i, \u0111\u1ea7u c\u00f3 m\u0169i l\u1ed3i t\u00f9. L\u00e1 gi\u1ea3 c\u00f3 4 g\u00e2n d\u1ecdc song song n\u1ed5i r\u00f5 v\u00e0 c\u0169ng l\u00e0 lo\u1ea1i l\u00e1 tr\u01b0\u1edfng th\u00e0nh t\u1ed3n t\u1ea1i \u0111\u1ebfn h\u1ebft \u0111\u1eddi c\u1ee7a c\u00e2y.<\/p>\n

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

Hoa t\u1ef1 h\u00ecnh b\u00f4ng d\u00e0i g\u1ea7n b\u1eb1ng l\u00e1, m\u1ecdc l\u1ebb ho\u1eb7c t\u1eadp trung 2-4 hoa t\u1ef1 \u1edf n\u00e1ch l\u00e1. Hoa \u0111\u1ec1u l\u01b0\u1ee1ng t\u00ednh c\u00f3 m\u00e0u tr\u1eafng nh\u1ea1t ho\u1eb7c m\u00e0u kem, c\u00e2y 18-24 th\u00e1ng tu\u1ed5i \u0111\u00e3 c\u00f3 th\u1ec3 ra hoa nh\u01b0ng ra hoa nhi\u1ec1u nh\u1ea5t v\u00e0o tu\u1ed5i 4-5, m\u00f9a hoa ch\u00ednh th\u01b0\u1eddng v\u00e0o th\u00e1ng 6-7.<\/p>\n

Qu\u1ea3 \u0111\u1eadu, d\u1eb9t, m\u1ecfng, khi gi\u00e0 kh\u00f4 v\u1ecf qu\u1ea3 cong xo\u1eafn l\u1ea1i. H\u1ea1t h\u00ecnh tr\u00e1i xoan h\u01a1i d\u1eb9t, m\u00e0u \u0111en v\u00e0 b\u00f3ng, v\u1ecf d\u00e0y, c\u1ee9ng, c\u00f3 d\u00ednh gi\u1ea3i m\u00e0u \u0111\u1ecf v\u00e0ng, khi ch\u00edn v\u00e0 kh\u00f4 v\u1ecf n\u1ee9t h\u1ea1t r\u01a1i ra mang theo gi\u1ea3i \u0111\u00f3 h\u1ea5p d\u1eabn ki\u1ebfn v\u00e0 chim gi\u00fap ph\u00e1t t\u00e1n h\u1ea1t \u0111i xa h\u01a1n. M\u1ed9t kg h\u1ea1t c\u00f3 t\u1eeb 52000-95000 h\u1ea1t.<\/p>\n

R\u1ec5 ph\u00e1t tri\u1ec3n m\u1ea1nh c\u1ea3 r\u1ec5 c\u1ecdc v\u00e0 r\u1ec5 b\u00e0ng, \u0111\u1ea7u r\u1ec5 c\u00e1m c\u00f3 nhi\u1ec1u n\u1ed1t s\u1ea7n ch\u1ee9a vi khu\u1ea9n c\u1ed9ng sinh c\u00f3 kh\u1ea3 n\u0103ng c\u1ed1 \u0111\u1ecbnh \u0111\u1ea1m.<\/p>\n

3. \u0110\u1eb7c t\u00ednh sinh th\u00e1i<\/b><\/p>\n

Keo tai t\u01b0\u1ee3ng m\u1ecdc t\u1ef1 nhi\u00ean \u1edf \u0110\u00f4ng B\u1eafc \u00d4xtr\u00e2ylia t\u1ea1i c\u00e1c v\u00f9ng Queensland, Jar\u0111in – Claudie River, Ayton – Nam Ingham. Ngo\u00e0i ra c\u00f2n th\u1ea5y xu\u1ea5t hi\u1ec7n \u1edf ph\u00eda \u0110\u00f4ng c\u1ee7a In\u0111\u00f4n\u00eaxia v\u00e0 ph\u00eda T\u00e2y Papua Niu Ghin\u00ea. To\u1ea1 \u0111\u1ed9 \u0111\u1ecba l\u00fd t\u1eeb 1 \u0111\u1ebfn 19o<\/sup> v\u0129 Nam v\u00e0 125o<\/sup>22′-146o<\/sup>17‘ <\/sup>kinh \u0110\u00f4ng, \u1edf \u0111\u1ed9 cao d\u01b0\u1edbi 800m so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n.<\/p>\n

Keo tai t\u01b0\u1ee3ng th\u01b0\u1eddng m\u1ecdc th\u00e0nh c\u00e1c qu\u1ea7n th\u1ee5 l\u1edbn kh\u00f4ng li\u00ean t\u1ee5c d\u1ecdc theo b\u1edd bi\u1ec3n, g\u1ea7n nh\u1eefng khu r\u1eebng ng\u1eadp m\u1eb7n, c\u0169ng g\u1eb7p m\u1ecdc xen l\u1eabn \u0111\u1ed3ng c\u1ecf \u1edf ven s\u00f4ng thu\u1ed9c v\u00f9ng nhi\u1ec7t \u0111\u1edbi \u1ea9m c\u00f3 4 \u0111\u00e9n 6 th\u00e1ng m\u00f9a kh\u00f4. L\u01b0\u1ee3ng m\u01b0a trung b\u00ecnh 1446-2970 mm, nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh th\u00e1ng th\u1ea5p nh\u1ea5t l\u00e0 13-21o<\/sup>C, th\u00e1ng cao nh\u1ea5t t\u1eeb 25-32o<\/sup>C. L\u00e0 lo\u00e0i c\u00e2y \u01b0a s\u00e1ng m\u1ea1nh v\u00e0 c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u1eadp tr\u1ed3ng th\u00e0nh c\u00f4ng \u1edf nhi\u1ec1u n\u01b0\u1edbc nh\u01b0 Trung Qu\u1ed1c, Malaixia, Philippin, Th\u00e1i Lan, L\u00e0o,…, sinh tr\u01b0\u1edfng m\u1ea1nh nh\u1ea5t \u1edf n\u01a1i c\u00f3 \u0111\u1ed9 cao d\u01b0\u1edbi 300m so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n.<\/p>\n

V\u00e0o \u0111\u1ea7u nh\u1eefng n\u0103m 80 c\u1ee7a th\u1ebf k\u1ef7 tr\u1ee9\u01a1c \u0111\u01b0\u1ee3c s\u1ef1 t\u00e0i tr\u1ee3 c\u1ee7a m\u1ed9t s\u1ed1 t\u1ed5 ch\u1ee9c qu\u1ed1c t\u1ebf, c\u00f9ng v\u1edbi m\u1ed9t s\u1ed1 lo\u00e0i keo v\u00f9ng th\u1ea5p kh\u00e1c, keo tai t\u01b0\u1ee3ng \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o g\u00e2y tr\u1ed3ng kh\u1ea3o nghi\u1ec7m \u1edf m\u1ed9t s\u1ed1 v\u00f9ng sinh th\u00e1i ch\u00ednh c\u1ee7a n\u01b0\u1edbc ta. Ng\u00e0y nay, b\u00ean c\u1ea1nh vi\u1ec7c ngu\u1ed3n gi\u1ed1ng ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng m\u1ed9t ph\u1ea7n th\u00ec di\u1ec7n t\u00edch tr\u1ed3ng keo tai t\u01b0\u1ee3ng c\u0169ng \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng \u1edf h\u1ea7u h\u1ebft c\u00e1c t\u1ec9nh trong c\u1ea3 n\u01b0\u1edbc v\u1edbi kho\u1ea3ng 200000 ha t\u00ednh \u0111\u1ebfn n\u0103m 2006.<\/p>\n

\u0110\u00e2y l\u00e0 lo\u00e0i c\u00f3 bi\u00ean \u0111\u1ed9 sinh th\u00e1i r\u1ed9ng, th\u00edch nghi \u0111\u01b0\u1ee3c v\u1edbi nhi\u1ec1u v\u00f9ng l\u1eadp \u0111\u1ecba kh\u00e1c nhau, c\u00f3 th\u1ec3 tr\u1ed3ng tr\u00ean \u0111\u1ea5t b\u1ecb x\u00f3i m\u00f2n, ngh\u00e8o dinh d\u01b0\u1ee1ng, \u0111\u1ea5t chua, b\u1ed3i t\u1ee5, \u0111\u1ea5t ph\u00f9 sa, v\u1edbi \u0111\u1ed9 pH t\u1eeb 4-4,5. C\u0169ng c\u00f3 th\u1ec3 s\u1ed1ng \u0111\u01b0\u1ee3c \u1edf nh\u1eefng v\u00f9ng ng\u1eadp \u00fang, tho\u00e1t n\u01b0\u1edbc k\u00e9m. Tuy nhi\u00ean \u1edf nh\u1eefng n\u01a1i n\u00e0y ch\u00fang sinh tr\u01b0\u1edfng k\u00e9m v\u00e0 th\u01b0\u1eddng ph\u00e2n c\u00e0nh s\u1edbm, chi\u1ec1u cao kh\u00f4ng qu\u00e1 10m. Sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t l\u00e0 tr\u00ean \u0111\u1ea5t s\u00e2u, \u1ea9m v\u00e0 gi\u1ea7u dinh d\u01b0\u1ee1ng, tho\u00e1ng kh\u00ed v\u00e0 tho\u00e1t n\u01b0\u1edbc t\u1ed1t, c\u00f9ng v\u1edbi \u0111\u1ed9 pH trung t\u00ednh ho\u1eb7c h\u01a1i chua.<\/p>\n

4. Gi\u1ed1ng v\u00e0 t\u1ea1o c\u00e2y con<\/b><\/p>\n

H\u1ea1t gi\u1ed1ng Keo tai t\u01b0\u1ee3ng ph\u1ea3i \u0111\u01b0\u1ee3c thu h\u00e1i t\u1eeb c\u00e1c c\u00e2y m\u1eb9 trong c\u00e1c r\u1eebng gi\u1ed1ng ho\u1eb7c r\u1eebng gi\u1ed1ng chuy\u1ec3n ho\u00e1 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn. \u01afu ti\u00ean l\u1ea5y gi\u1ed1ng c\u1ee7a c\u00e1c xu\u1ea5t x\u1ee9 Pongaki, Cardwell, Iron range v\u00e0 m\u1ed9t s\u1ed1 xu\u1ea5t x\u1ee9 t\u1ed1t c\u00f3 ngu\u1ed3n g\u1ed1c \u00a0Papua Niu Ghin\u00ea \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn l\u00e0 gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt \u0111\u1ec3 tr\u1ed3ng r\u1eebng.<\/p>\n

L\u00e0 nh\u00f3m lo\u00e0i c\u00e2y c\u00f3 h\u1ec7 s\u1ed1 nh\u00e2n gi\u1ed1ng cao, c\u00f3 th\u1ec3 t\u1ea1o gi\u1ed1ng b\u1eb1ng gieo h\u1ea1t nh\u01b0ng d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng cho k\u1ebft qu\u1ea3 c\u00f2n h\u1ea1n ch\u1ebf.<\/p>\n

C\u00e2y 2 tu\u1ed5i c\u00f3 th\u1ec3 ra hoa k\u1ebft qu\u1ea3, tuy nhi\u00ean \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00f3 \u0111\u01b0\u1ee3c ngu\u1ed3n gi\u1ed1ng t\u1ed1t cho tr\u1ed3ng r\u1eebng ch\u1ec9 thu h\u1ea1t c\u1ee7a nh\u1eefng c\u00e2y m\u1eb9 t\u1eeb 6 tu\u1ed5i tr\u1edf l\u00ean \u1edf r\u1eebng gi\u1ed1ng ho\u1eb7c r\u1eebng gi\u1ed1ng chuy\u1ec3n ho\u00e1 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn. Ch\u1ecdn c\u00e2y m\u1eb9 c\u00f3 h\u00ecnh d\u00e1ng th\u00e2n \u0111\u1eb9p, sinh tr\u01b0\u1edfng t\u1ed1t, kh\u00f4ng b\u1ecb s\u00e2u b\u1ec7nh. Khi qu\u1ea3 chuy\u1ec3n t\u1eeb m\u00e0u xanh sang m\u00e0u n\u00e2u th\u00ec thu h\u00e1i r\u1ed3i ph\u01a1i tr\u00ean n\u1ec1n g\u1ea1ch cho v\u1ecf qu\u1ea3 kh\u00f4 \u0111\u1ec1u. Sau \u0111\u00f3 cho v\u00e0o bao t\u1ea3i v\u00e0 \u0111\u1eadp \u0111\u1ec3 t\u00e1ch h\u1ea1t ra. L\u00e0m s\u1ea1ch h\u1ea1t v\u00e0 ph\u01a1i trong n\u1eafng nh\u1eb9 cho \u0111\u1ebfn khi \u0111\u1ed9 \u1ea9m c\u1ee7a h\u1ea1t c\u00f2n kho\u1ea3ng 6-8%. Trong \u0111i\u1ec1u ki\u1ec7n c\u1ea5t tr\u1eef th\u00f4ng th\u01b0\u1eddng sau 2 n\u0103m v\u1eabn \u0111\u1ea3m b\u1ea3o s\u1ee9c n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t kho\u1ea3ng 60%. N\u1ebfu \u0111\u01b0\u1ee3c x\u1eed l\u00fd t\u1ed1t, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m ban \u0111\u1ea7u c\u1ee7a h\u1ea1t c\u00f3 th\u1ec3 \u0111\u1ea1t tr\u00ean 80% v\u00e0 1kg h\u1ea1t cho 30000-35000 c\u00e2y con ti\u00eau chu\u1ea9n.<\/p>\n

X\u1eed l\u00fd h\u1ea1t tr\u01b0\u1edbc khi gieo b\u1eb1ng c\u00e1ch cho h\u1ea1t v\u00e0o ch\u1eadu r\u1ed3i \u0111\u1ed5 n\u01b0\u1edbc s\u00f4i v\u00e0o v\u1edbi t\u1ef7 l\u1ec7 1\/10 v\u00e0 ng\u00e2m trong kho\u1ea3ng 30 ph\u00fat, sau \u0111\u00f3 v\u1edbt ra \u0111em ng\u00e2m v\u00e0o n\u01b0\u1edbc l\u00e3 kho\u1ea3ng 1 gi\u1edd v\u00e0 r\u1eeda s\u1ea1ch. C\u00f3 th\u1ec3 \u0111em gieo ngay ho\u1eb7c \u1ee7 trong t\u00fai v\u1ea3i 2-3 ng\u00e0y th\u00ec h\u1ea1t n\u1ee9t nanh v\u00e0 \u0111em c\u1ea5y v\u00e0o b\u1ea7u ho\u1eb7c gieo tr\u00ean lu\u1ed1ng. C\u1ea7n l\u01b0u \u00fd trong qu\u00e1 tr\u00ecnh \u1ee7 h\u1ea1t ph\u1ea3i r\u1eeda chua v\u00e0 thay t\u00fai h\u00e0ng ng\u00e0y.<\/p>\n

K\u1ef9 thu\u1eadt t\u1ea1o b\u1ea7u, gieo c\u00e2y, ch\u0103m s\u00f3c c\u00e2y con t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u0111\u1ed1i v\u1edbi Keo l\u00e1 tr\u00e0m.<\/p>\n

Ti\u00eau chu\u1ea9n c\u00e2y con \u0111em tr\u1ed3ng: Kho\u1ebb m\u1ea1nh, kh\u00f4ng b\u1ecb s\u00e2u b\u1ec7nh, chi\u1ec1u cao t\u1ed1i thi\u1ec3u 50cm, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c t\u1ed1i thi\u1ec3u 0,5cm.<\/p>\n

5. Tr\u1ed3ng v\u00e0 ch\u0103m s\u00f3c r\u1eebng<\/b><\/p>\n

\u1ede n\u01b0\u1edbc ta Keo tai t\u01b0\u1ee3ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c tr\u1ed3ng thu\u1ea7n lo\u00e0i ho\u1eb7c c\u0169ng c\u00f3 m\u1ed9t s\u1ed1 n\u01a1i \u0111\u01b0\u1ee3c tr\u1ed3ng h\u1ed7n giao v\u1edbi b\u1ea1ch \u0111\u00e0n, phi lao, tr\u00e1m,… nh\u01b0ng ch\u01b0a m\u1ea5y th\u00e0nh c\u00f4ng.<\/p>\n

\u0110\u1ec3 t\u1eadn d\u1ee5ng kh\u1ea3 n\u0103ng c\u1ea3i t\u1ea1o \u0111\u1ea5t c\u1ee7a nh\u1eefng lo\u00e0i c\u00e2y c\u00f3 n\u1ed1t s\u1ea7n c\u1ed1 \u0111\u1ecbnh \u0111\u1ea1m t\u1ef1 nhi\u00ean, qua \u0111\u00f3 cung c\u1ea5p dinh d\u01b0\u1ee1ng cho c\u00e2y, g\u00f3p ph\u1ea7n c\u1ea3i t\u1ea1o \u0111\u1ea5t, n\u00ean keo tai t\u01b0\u1ee3ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf nh\u1eefng n\u01a1i \u0111\u1ea5t tr\u1ed1ng \u0111\u1ed3i n\u00fai tr\u1ecdc.<\/p>\n

Th\u00edch h\u1ee3p g\u00e2y tr\u1ed3ng \u1edf nh\u1eefng n\u01a1i c\u00f3 l\u01b0\u1ee3ng m\u01b0a b\u00ecnh qu\u00e2n n\u0103m 1500-2200mm, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n n\u0103m 22-27o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n th\u00e1ng n\u00f3ng nh\u1ea5t <30o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n th\u00e1ng l\u1ea1nh nh\u1ea5t >22o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i cao tuy\u1ec7t \u0111\u1ed1i <32o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i th\u1ea5p tuy\u1ec7t \u0111\u1ed1i >15o<\/sup>C, c\u00f3 0-3 th\u00e1ng m\u01b0a \u00edt h\u01a1n 50mm, \u0111\u1ed9 cao 1-500m so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n, \u0111\u1ecba h\u00ecnh d\u1ed1c <15o<\/sup>; lo\u1ea1i \u0111\u1ea5t \u0111\u1ecf tr\u00ean m\u1eafc ma baz\u01a1 v\u00e0 trung t\u00ednh, \u0111\u1ea5t \u0111\u1ecf v\u00e0ng tr\u00ean \u0111\u00e1 kh\u00e1c, \u0111\u1ea5t ph\u00f9 sa, \u0111\u1ea5t x\u00e1m, \u0111\u1ed9 d\u00e0y t\u1ea7ng \u0111\u1ea5t tr\u00ean 100cm.<\/p>\n

C\u00f3 th\u1ec3 m\u1edf r\u1ed9ng g\u00e2y tr\u1ed3ng \u1edf nh\u1eefng n\u01a1i c\u00f3 l\u01b0\u1ee3ng m\u01b0a b\u00ecnh qu\u00e2n n\u0103m 1300-1500mm, 2200-2400mm, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n n\u0103m 19-22 ho\u1eb7c 27-30o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n th\u00e1ng n\u00f3ng nh\u1ea5t 30-32o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n th\u00e1ng l\u1ea1nh nh\u1ea5t 15-22o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i cao tuy\u1ec7t \u0111\u1ed1i 32-34o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i th\u1ea5p tuy\u1ec7t \u0111\u1ed1i 10-15o<\/sup>C, c\u00f3 3-5 th\u00e1ng m\u01b0a \u00edt h\u01a1n 50mm, \u0111\u1ed9 cao tr\u00ean 500-700m so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n, \u0111\u1ecba h\u00ecnh d\u1ed1c 15-25o<\/sup>; lo\u1ea1i \u0111\u1ea5t thung l\u0169ng d\u1ed1c t\u1ee5, \u0111\u1ea5t \u0111\u1ecf v\u00e0ng v\u00e0 \u0111\u1ea5t m\u00f9n tr\u00ean n\u00fai, \u0111\u1ed9 d\u00e0y t\u1ea7ng \u0111\u1ea5t tr\u00ean 50-100cm.<\/p>\n

H\u1ea1n ch\u1ebf g\u00e2y tr\u1ed3ng \u1edf nh\u1eefng n\u01a1i c\u00f3 l\u01b0\u1ee3ng m\u01b0a b\u00ecnh qu\u00e2n n\u0103m <1300 ho\u1eb7c >2400mm, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n n\u0103m <19o<\/sup>C ho\u1eb7c >30o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n th\u00e1ng n\u00f3ng nh\u1ea5t >32o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n th\u00e1ng l\u1ea1nh nh\u1ea5t <15o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i cao tuy\u1ec7t \u0111\u1ed1i >34o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i th\u1ea5p tuy\u1ec7t \u0111\u1ed1i 10<o<\/sup>C, c\u00f3 5 th\u00e1ng m\u01b0a <50mm, \u0111\u1ed9 cao tr\u00ean >750m so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n, \u0111\u1ecba h\u00ecnh d\u1ed1c >25o<\/sup>; lo\u1ea1i \u0111\u1ea5t x\u00f3i m\u00f2n tr\u01a1 s\u1ecfi \u0111\u00e1; \u0111\u1ea5t \u0111en v\u00e0 \u0111\u1ea5t than b\u00f9n; \u0111\u1ea5t m\u1eb7n m\u00f9a kh\u00f4, \u0111\u1ea5t m\u1eb7n th\u01b0\u1eddng xuy\u00ean; \u0111\u1ea5t ph\u00e8n n\u1eb7ng, \u0111\u1ea5t ph\u00e8n trung b\u00ecnh v\u00e0 nh\u1eb9; \u0111\u1ea5t c\u00e1t, \u0111\u1ea5t c\u00f3 \u0111\u1ed9 d\u00e0y <50cm.<\/p>\n

Di\u1ec7n t\u00edch \u0111\u1ea5t t\u1ef1 nhi\u00ean to\u00e0n qu\u1ed1c th\u00edch h\u1ee3p \u0111\u1ec3 tr\u1ed3ng Keo tai t\u01b0\u1ee3ng chi\u1ebfm\u00a0 23,3%, c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng 27,2%, \u00edt th\u00edch h\u1ee3p 49,6%.<\/p>\n

X\u1eed l\u00fd th\u1ef1c b\u00ec to\u00e0n di\u1ec7n \u1edf n\u01a1i c\u00f3 th\u1ef1c b\u00ec m\u1ecdc t\u1ed1t. Tr\u1ed3ng v\u1edbi m\u1eadt \u0111\u1ed9 2500-3300 c\u00e2y\/ha v\u1edbi m\u1ee5c ti\u00eau ph\u00f2ng h\u1ed9, 1600-2000 c\u00e2y\/ha v\u1edbi m\u1ee5c ti\u00eau s\u1ea3n su\u1ea5t.<\/p>\n

C\u00e1c t\u1ec9nh B\u1eafc b\u1ed9 v\u00e0 Thanh Ho\u00e1 tr\u1ed3ng v\u1ee5 Xu\u00e2n H\u00e8 (th\u00e1ng 3-5), c\u00f3 th\u1ec3 tr\u1ed3ng v\u1ee5 Thu (th\u00e1ng 7-8). C\u00e1c t\u1ec9nh ven bi\u1ec3n mi\u1ec1n Trung tr\u1ed3ng v\u1ee5 Thu \u0110\u00f4ng (th\u00e1ng 9-11). C\u00e1c t\u1ec9nh T\u00e2y Nguy\u00ean v\u00e0 Nam b\u1ed9 tr\u1ed3ng \u0111\u1ea7u m\u00f9a m\u01b0a (th\u00e1ng 4-6).<\/p>\n

N\u1ebfu tr\u1ed3ng r\u1eebng nguy\u00ean li\u1ec7u ph\u1ee5c v\u1ee5 cho ng\u00e0nh gi\u1ea5y, ch\u1ec9 c\u1ea7n t\u1ec9a th\u01b0a 1 l\u1ea7n v\u00e0o tu\u1ed5i 6-7 v\u00e0 c\u00f3 th\u1ec3 khai th\u00e1c \u1edf tu\u1ed5i 9-10. Khi m\u1ee5c \u0111\u00edch tr\u1ed3ng r\u1eebng l\u00e0 \u0111\u1ec3 l\u1ea5y g\u1ed7 x\u1ebb ph\u1ea3i ti\u1ebfn h\u00e0nh t\u1ec9a th\u01b0a l\u1ea7n 2 v\u00e0o tu\u1ed5i 9-10, c\u01b0\u1eddng \u0111\u1ed9 t\u1ec9a th\u01b0a l\u00e0 30% s\u1ed1 c\u00e2y hi\u1ec7n c\u00f3 trong l\u00e2m ph\u1ea7n. Khi r\u1eebng \u0111\u1ebfn tu\u1ed5i 15-18 ti\u1ebfn h\u00e0nh khai th\u00e1c ch\u00ednh theo ph\u01b0\u01a1ng th\u1ee9c ch\u1eb7t\u00a0 tr\u1eafng. Keo tai t\u01b0\u1ee3ng c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh h\u1ea1t r\u1ea5t t\u1ed1t, c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng kh\u1ea3 n\u0103ng \u0111\u00f3 sau khai th\u00e1c lu\u00e2n k\u1ef3 1 \u0111\u1ec3 ph\u1ee5c h\u1ed3i r\u1eebng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i tr\u1ed3ng l\u1ea1i.<\/p>\n

6. Khai th\u00e1c, s\u1eed d\u1ee5ng<\/b><\/p>\n

C\u0169ng gi\u1ed1ng nh\u01b0 Keo l\u00e1 tr\u00e0m, Keo tai t\u01b0\u1ee3ng l\u00e0 c\u00e2y \u0111a t\u00e1c d\u1ee5ng, g\u1ed7 c\u00f3 gi\u00e1c l\u00f5i ph\u00e2n bi\u1ec7t, v\u1edbi t\u1ef7 tr\u1ecdng t\u1eeb 0,5-0,6, s\u1ee3i d\u00e0i 1-1,2 mm; d\u00f9ng l\u00e0m g\u1ed7 gi\u1ea5y, g\u1ed7 d\u0103m, g\u1ed7 x\u1ebb, \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c cao c\u1ea5p, l\u00e0m v\u00e1n gh\u00e9p thanh, bao b\u00ec,…. G\u1ed7 c\u00f3 nhi\u1ec7t l\u01b0\u1ee3ng kh\u00e1 cao 4800 kcal\/kg do \u0111\u00f3 c\u0169ng c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 \u0111\u1ed1t than, l\u00e0m c\u1ee7i \u0111un r\u1ea5t t\u1ed1t.<\/p>\n

L\u00e0 lo\u00e0i c\u00e2y m\u1ecdc nhanh, t\u00e1n l\u00e1 d\u00e0y, th\u01b0\u1eddng xanh n\u00ean c\u00f2n \u0111\u01b0\u1ee3c tr\u1ed3ng l\u00e0m c\u00e2y b\u00f3ng m\u00e1t \u1edf c\u00f4ng vi\u00ean, \u0111\u01b0\u1eddng ph\u1ed1. Hoa c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 nu\u00f4i ong, v\u1ecf ch\u1ee9a ta nin d\u00f9ng cho c\u00f4ng ngh\u1ec7 thu\u1ed9c da, l\u00e1 c\u00e2y c\u00f3 th\u1ec3 l\u00e0m th\u1ee9c \u0103n cho gia s\u00fac.<\/p>\n

R\u1ec5 c\u00f3 nhi\u1ec1u n\u1ed1t s\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng c\u1ed1 \u0111\u1ecbnh \u0111\u1ea1m r\u1ea5t t\u1ed1t, n\u00ean Keo tai t\u01b0\u1ee3ng n\u00f3i ri\u00eang v\u00e0 c\u00e1c lo\u00e0i keo n\u00f3i chung, ngo\u00e0i vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t, r\u1eebng ph\u00f2ng h\u1ed9, c\u00f2n \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf nh\u1eefng n\u01a1i c\u00f3 \u0111\u1ea5t kh\u00f4 c\u1eb1n, b\u1ecb tho\u00e1i ho\u00e1 \u0111\u1ec3 t\u1eadn d\u1ee5ng kh\u1ea3 n\u0103ng c\u1ea3i t\u1ea1o \u0111\u1ea5t c\u1ee7a ch\u00fang.<\/p>\n

R\u1eebng keo tai t\u01b0\u1ee3ng tr\u1ed3ng 10 tu\u1ed5i \u1edf n\u01a1i \u0111\u1ea5t trung b\u00ecnh c\u00f3 th\u1ec3 cho 12 \u0111\u1ebfn 15 m3<\/sup>\/ha\/n\u0103m, n\u01a1i \u0111\u1ea5t t\u1ed1t v\u1edbi xu\u1ea5t x\u1ee9 ph\u00f9 h\u1ee3p v\u00e0 tr\u1ed3ng th\u00e2m canh c\u00f3 th\u1ec3 cho 18 \u0111\u1ebfn 20, th\u1eadm ch\u00ed \u0111\u1ea1t 25 m3<\/sup>\/ha\/n\u0103m. T\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n \u1edf giai \u0111o\u1ea1n 10-13 tu\u1ed5i \u0111\u1ea1t t\u1edbi 24m3<\/sup>\/ha\/n\u0103m, \u1edf Nam Phi r\u1eebng tr\u1ed3ng b\u1eb1ng c\u00e2y con t\u1eeb h\u1ea1t \u0111\u1ea1t 21,9 m3<\/sup>\/ha\/n\u0103m v\u00e0 t\u1eeb c\u00e1c d\u00f2ng v\u00f4 t\u00ednh \u0111\u1ea1t 30 m3<\/sup>\/ha\/n\u0103m.<\/p>\n

N\u1ebfu k\u1ebft h\u1ee3p kinh doanh g\u1ed7 x\u1ebb sau 15-18 n\u0103m khai th\u00e1c g\u1ed7 d\u00f9ng \u0111\u1ec3 \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c cao c\u1ea5p nh\u1ea5t l\u00e0 cho xu\u1ea5t kh\u1ea9u th\u00ec c\u00e0ng c\u00f3 gi\u00e1 tr\u1ecb cao, c\u0169ng v\u00ec v\u1eady m\u00e0 nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y nhi\u1ec1u n\u01a1i \u0111\u00e3 r\u1ea5t ch\u00fa tr\u1ecdng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng nh\u1ea5t l\u00e0 \u1edf c\u00e1c t\u1ec9nh ph\u00eda B\u1eafc nh\u01b0 Tuy\u00ean Quang, Y\u00ean B\u00e1i, Ph\u00fa Th\u1ecd, Qu\u1ea3ng Ninh,….<\/p>\n

\u1ede m\u1ed9t s\u1ed1 l\u1eadp \u0111\u1ecba ho\u1eb7c m\u1ed9t s\u1ed1 xu\u1ea5t x\u1ee9 th\u01b0\u1eddng g\u1eb7p c\u00f3 c\u00e2y b\u1ecb r\u1ed7ng ru\u1ed9t l\u00e0m gi\u1ea3m gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng c\u1ee7a g\u1ed7 nh\u01b0ng ch\u01b0a x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n m\u1ed9t c\u00e1ch ch\u1eafc ch\u1eafn v\u00e0 c\u0169ng ch\u01b0a t\u00ecm \u0111\u01b0\u1ee3c bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c c\u00f3 hi\u1ec7u qu\u1ea3.<\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

T\u00ean kh\u00e1c: Keo l\u00e1 to, Keo m\u1ee1 T\u00ean khoa h\u1ecdc: Acacia mangium Wild H\u1ecd th\u1ef1c v\u1eadt: Trinh n\u1eef (Mimosaceae) 1. \u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i C\u00e2y g\u1ed7 trung b\u00ecnh, chi\u1ec1u cao bi\u1ebfn \u0111\u1ed9ng t\u1eeb 7 \u0111\u1ebfn 30 m, \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 25-35cm, \u0111\u00f4i khi tr\u00ean 50 cm. Th\u00e2n th\u1eb3ng, v\u1ecf c\u00f3 m\u00e0u n\u00e2u x\u00e1m \u0111\u1ebfn n\u00e2u, […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13119"}],"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=13119"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13119\/revisions"}],"predecessor-version":[{"id":13122,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13119\/revisions\/13122"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=13119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=13119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=13119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}