{"id":13271,"date":"2014-05-29T16:36:39","date_gmt":"2014-05-29T09:36:39","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=13271"},"modified":"2020-05-15T06:24:36","modified_gmt":"2020-05-14T23:24:36","slug":"ky-thuat-trong-samu","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ky-thuat-trong-samu\/","title":{"rendered":"K\u1ef9 thu\u1eadt tr\u1ed3ng Samu"},"content":{"rendered":"

SA MU<\/b><\/p>\n

T\u00ean kh\u00e1c: Sa m\u00f4\u0323c<\/p>\n

T\u00ean khoa h\u1ecdc: Cunninghamia lanceolata <\/i>(Lamb.) Hook. <\/i><\/p>\n

H\u1ecd th\u1ef1c v\u1eadt: B\u1ee5t m\u1ecdc (Taxodiaceae)<\/p>\n

1. \u0110\u0103\u0323c \u0111i\u00ea\u0309m hi\u0300nh tha\u0301i<\/b><\/p>\n

C\u00e2y g\u1ed7 l\u1edbn, cao tr\u00ean 30 m, \u0111\u01b0\u1eddng k\u00ednh c\u00f3 th\u1ec3 t\u1edbi tr\u00ean 200 cm. Th\u00e2n tr\u00f2n v\u00e0 r\u1ea5t th\u1eb3ng. V\u1ecf n\u00e2u ho\u1eb7c x\u00e1m n\u00e2u, n\u1ee9t d\u1ecdc. Ph\u00e2n c\u00e0nh th\u1ea5p, c\u00e0nh m\u1ecdc v\u00f2ng, th\u1eb3ng g\u00f3c v\u1edbi th\u00e2n, x\u1ebfp th\u00e0nh nhi\u1ec1u t\u1ea7ng. T\u00e1n l\u00e1 h\u1eb9p h\u00ecnh tr\u1ee5.<\/p>\n

L\u00e1 h\u00ecnh ng\u1ecdn gi\u00e1o, d\u00e0i 3-6 cm, r\u1ed9ng 3-5 mm; \u0111\u1ea7u nh\u1ecdn, c\u1ee9ng; m\u00e9p l\u00e1 c\u00f3 r\u0103ng c\u01b0a s\u1eafc. D\u1ecdc 2 b\u00ean g\u00e2n gi\u1eefa ph\u00eda m\u1eb7t d\u01b0\u1edbi l\u00e1 c\u00f3 2 d\u1ea3i ph\u1ea5n tr\u1eafng, m\u1eb7t tr\u00ean c\u00f3 2 r\u00e3nh song song m\u00e9p l\u00e1. L\u00e1 x\u1ebfp xo\u1eafn \u1ed1c nh\u01b0ng v\u1eb7n \u1edf cu\u1ed1ng v\u00e0 c\u00f9ng v\u1edbi c\u00e0nh l\u00e0m th\u00e0nh m\u1eb7t ph\u1eb3ng.<\/p>\n

N\u00f3n \u0111\u01a1n t\u00ednh c\u00f9ng g\u1ed1c. N\u00f3n \u0111\u1ef1c m\u1ecdc c\u1ee5m \u0111\u1ea7u c\u00e0nh. N\u00f3n c\u00e1i m\u1ecdc l\u1ebb ho\u1eb7c g\u1ed3m 2-3 chi\u1ebfc m\u1ecdc c\u1ee5m \u0111\u1ea7u c\u00e0nh. Qu\u1ea3 n\u00f3n h\u00ecnh tr\u1ee9ng tr\u00f2n, cao 2,5-5 cm, \u0111\u01b0\u1eddng k\u00ednh 3-5 cm. L\u00e1 b\u1eafc d\u1ea1ng v\u1ea9y, ho\u00e1 g\u1ed7, bao ph\u00eda ngo\u00e0i v\u1ea3y n\u00f3n (l\u00e1 no\u00e3n); m\u1ed7i v\u1ea3y n\u00f3n mang 3 h\u1ea1t. H\u1ea1t d\u1eb9t, c\u00f3 c\u00e1nh m\u1ecfng bao quanh. N\u00f3n h\u00ecnh th\u00e0nh v\u00e0o th\u00e1ng 3, ch\u00edn\u00a0 va\u0300o th\u00e1ng 10-11.<\/p>\n

R\u1ec5 ch\u00ednh \u00edt ph\u00e1t tri\u1ec3n, r\u1ec5 \u0103n n\u00f4ng, r\u1ec5 b\u00e0ng t\u1eadp trung \u1edf l\u1edbp \u0111\u1ea5t m\u1eb7t nh\u1ea5t l\u00e0 khi nh\u1ecf tu\u1ed5i h\u1ec7 r\u1ec5 ph\u00e2n b\u1ed1 g\u1ea7n nh\u01b0 \u0103n ngang.<\/p>\n

2. \u0110\u0103\u0323c ti\u0301nh sinh tha\u0301i<\/b><\/p>\n

Sa mu ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean \u1edf v\u00f9ng kh\u00ed h\u1eadu \u00f4n v\u00e0 \u00e1 nhi\u1ec7t \u0111\u1edbi thu\u1ed9c mi\u1ec1n Trung v\u00e0 Nam Trung Qu\u1ed1c bi\u00ean gi\u1edbi Vi\u1ec7t – Trung, t\u1eeb 22 \u0111\u1ebfn 32 v\u0129 \u0111\u1ed9 B\u1eafc. Vi\u1ec7t Nam \u0111\u00e3 tr\u1ed3ng \u1edf c\u00e1c t\u1ec9nh bi\u00ean gi\u1edbi ph\u00eda B\u1eafc nh\u01b0 H\u00e0 Giang, Lai Ch\u00e2u, L\u00e0o Cai, Y\u00ean B\u00e1i, L\u1ea1ng S\u01a1n, Cao B\u1eb1ng, Qu\u1ea3ng Ninh nhi\u1ec1u n\u0103m nay.<\/b><\/p>\n

Sa mu \u01b0a n\u01a1i kh\u00ed h\u1eadu \u00f4n h\u00f2a, \u00edt th\u00e1ng r\u00e9t qu\u00e1 v\u00e0 c\u0169ng kh\u00f4ng c\u00f3 th\u00e1ng qu\u00e1 n\u00f3ng. Th\u00edch h\u1ee3p \u1edf nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh n\u0103m t\u1eeb 16-190<\/sup>C l\u01b0\u1ee3ng m\u01b0a n\u0103m 1400-1900mm. \u0110\u1ed9 \u1ea9m kh\u00f4ng kh\u00ed c\u1ee7a c\u00e1c th\u00e1ng trong n\u0103m tr\u00ean 75%, v\u00f9ng c\u00f3 nhi\u1ec1u s\u01b0\u01a1ng m\u00f9 v\u00e0 \u00e1nh s\u00e1ng t\u00e1n x\u1ea1.<\/p>\n

Sa mu \u01b0a \u0111\u1ea5t s\u00e2u \u1ea9m, c\u00e1t pha, tho\u00e1t n\u01b0\u1edbc, m\u00e1t tho\u00e1ng, \u0111\u1ed9 pH l\u1edbn h\u01a1n 5, nhi\u1ec1u m\u00f9n, c\u00f2n mang t\u00ednh ch\u1ea5t \u0111\u1ea5t r\u1eebng. \u01afa \u0111\u1ea5t ph\u00e1t tri\u1ec3n\u00a0 tr\u00ean \u0111\u00e1 phi\u1ebfn th\u1ea1ch s\u00e9t ho\u1eb7c phi\u1ebfn th\u1ea1ch mica, \u0111\u00e1 v\u00f4i, \u0111\u00e1 macma c\u00e1c lo\u1ea1i, c\u00f3 t\u1ea7ng d\u1ea7y 0,7-0,8m tr\u1edf l\u00ean. Kh\u00f4ng th\u00edch h\u1ee3p tr\u00ean \u0111\u1ea5t ki\u1ec1m ho\u1eb7c m\u1eb7n.<\/p>\n

Sa mu l\u00e0 lo\u00e0i c\u00e2y \u01b0a s\u00e1ng, l\u00fac nh\u1ecf c\u0169ng c\u1ea7n c\u00f3 b\u00f3ng che, m\u1ecdc kh\u00e1 nhanh so v\u1edbi c\u00e1c lo\u00e0i c\u00e2y l\u00e1 kim kh\u00e1c.<\/p>\n

Sa mu t\u1ec9a c\u00e0nh t\u1ef1 nhi\u00ean r\u1ea5t t\u1ed1t v\u00e0 t\u00e1i sinh ch\u1ed3i c\u0169ng r\u1ea5t m\u1ea1nh, c\u00f3 th\u1ec3 kinh doanh r\u1eebng ch\u1ed3i li\u00ean t\u1ee5c 3 \u0111\u1ebfn 4 th\u1ebf h\u1ec7.<\/p>\n

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

3. Gi\u00f4\u0301ng va\u0300 ta\u0323o c\u00e2y con<\/b><\/p>\n

\u00c1p d\u1ee5ng theo ti\u00eau chu\u1ea9n ng\u00e0nh 04-TCN-66-2002 – quy tr\u00ecnh tr\u1ed3ng r\u1eebng Sa m\u1ed9c, ban h\u00e0nh k\u00e8m theo quy\u1ebft \u0111\u1ecbnh s\u1ed1 4895\/Q\u0110-BNN-KHCN ng\u00e0y 11\/11\/2002 c\u1ee7a B\u1ed9 NN & PTNT.<\/p>\n

L\u1ea5y gi\u1ed1ng \u1edf r\u1eebng gi\u1ed1ng chuy\u1ec3n h\u00f3a \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn. Nh\u1eefng n\u01a1i ch\u01b0a c\u00f3 r\u1eebng gi\u1ed1ng \u0111\u01b0\u1ee3c l\u1ea5y h\u1ea1t t\u1eeb nh\u1eefng c\u00e2y m\u1ecdc ph\u00e2n t\u00e1n c\u00f3 tu\u1ed5i 15-30, sinh tr\u01b0\u1edfng t\u1ed1t, t\u00e1n \u0111\u1ec1u, th\u00e2n th\u1eb3ng, c\u00e2n \u0111\u1ed1i, kh\u00f4ng b\u1ecb s\u00e2u b\u1ec7nh, r\u1ed7ng ru\u1ed9t ho\u1eb7c c\u1ee5t ng\u1ecdn.<\/p>\n

C\u00e2y 10 tu\u1ed5i tr\u01a1\u0309 l\u00ean b\u1eaft \u0111\u1ea7u ra hoa. Th\u1eddi v\u1ee5 ra hoa t\u1eeb th\u00e1ng 3-4, qu\u1ea3 ch\u00edn th\u00e1ng 10-11. Thu h\u00e1i h\u1ea1t th\u01b0\u1eddng t\u1eeb 15\/10 \u0111\u1ebfn 15\/12. Khi ch\u00ednh qu\u1ea3 chuy\u1ec3n sang m\u00e0u v\u00e0ng nh\u1ea1t, h\u1ea1t m\u00e0u c\u00e1nh d\u00e1n, nh\u00e2n tr\u1eafng ho\u1eb7t tr\u1eafng m\u1edd, ch\u1eafc v\u00e0 \u0111\u1eb7c.<\/p>\n

Thu h\u00e1i h\u1ea1t b\u1eb1ng c\u00e1ch d\u00f9ng c\u00f9 n\u00e8o gi\u1eadt b\u1ebb t\u1eebng c\u00e0nh nh\u1ecf d\u01b0\u1edbi 2cm c\u00f3 qu\u1ea3. B\u1ebb t\u1eebng ch\u00f9m qu\u1ea3, lo\u1ea1i tr\u1eeb c\u00e0nh l\u00e1, \u0111em v\u1ec1 \u1ee7 \u0111\u1ed1ng 2-4 ng\u00e0y r\u1ed3i \u0111em hong ph\u01a1i d\u01b0\u1edbi n\u1eafng nh\u1eb9. Khi qu\u1ea3 n\u1ee9t v\u1ea9y, \u0111em hong ph\u01a1i l\u00ean m\u1eb9t, l\u00ean c\u00f3t trong r\u00e2m ho\u1eb7c n\u01a1i c\u00f3 n\u1eafng nh\u1eb9 2-3 ng\u00e0y; v\u00e0i gi\u1edd l\u1ea1i \u0111\u1eadp nh\u1eb9 \u0111\u1ec3 t\u00e1ch h\u1ea1t, s\u00e0ng s\u1ea9y l\u1ea5y h\u1ea1t t\u1ed1t.<\/p>\n

H\u1ea1t \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n kh\u00f4 trong chum v\u1ea1i, \u0111\u1ec3 n\u01a1i tho\u00e1ng, cao r\u00e1o. Th\u1ec9nh tho\u1ea3ng \u0111\u1ea3o h\u1ea1t. Lo\u1ea1i h\u1ea1t t\u1ed1t c\u00f3 t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m\u00a0 h\u01a1n 30% v\u00e0 ch\u1ec9 c\u00f3 kh\u1ea3 n\u0103ng c\u1ea5t tr\u1eef d\u01b0\u1edbi 6 th\u00e1ng. T\u1eeb th\u00e1ng th\u1ee9 ba tr\u1edf \u0111i t\u1ec9 l\u1ec7 n\u1ea3y m\u1ea7m gi\u1ea3m nhanh, l\u01b0\u1ee3ng h\u1ea1t c\u00f2n \u0111\u01b0\u1ee3c n\u1ea3y m\u1ea7m kh\u00f4ng \u0111\u00e1ng k\u1ec3, do v\u1eady h\u1ea1t sau khi ch\u1ebf bi\u1ebfn n\u00ean b\u1ed1 tr\u00ed gieo s\u1edbm. H\u1ea1t \u0111\u1ea3m b\u1ea3o ti\u00eau chu\u1ea9n c\u00f3 \u0111\u1ed9 s\u1ea1ch 85-95%, m\u1ed7i kg h\u1ea1t c\u00f3 t\u1eeb 120000 \u0111\u1ebfn 150000 h\u1ea1t, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m tr\u00ean 30%.<\/p>\n

\u0110\u1ea5t gieo \u01b0\u01a1m c\u1ea7n \u0111\u01b0\u1ee3c c\u00e0y b\u1eeba k\u1ef9 \u0111\u1ea3m b\u1ea3o t\u01a1i x\u1ed1p, l\u00ean lu\u1ed1ng.<\/p>\n

H\u1ea1t tr\u01b0\u1edbc khi gieo \u0111\u01b0\u1ee3c x\u1eed l\u00fd, ng\u00e2m trong n\u01b0\u1edbc \u1ea5m 40o<\/sup>C trong 8-12 gi\u1edd. V\u1edbt ra \u0111\u1ec3 r\u00e1o r\u1ed3i \u0111em \u1ee7. N\u1ebfu th\u1eddi ti\u1ebft \u1ea5m, c\u00f3 nhi\u1ec7t \u0111\u1ed9 ng\u00e0y tr\u00ean 22o<\/sup>C sau 4 ng\u00e0y \u1ee7 th\u00ec \u0111em gieo. N\u1ebfu th\u1eddi ti\u1ebft l\u1ea1nh, c\u00f3 nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi 22o<\/sup>C th\u00ec th\u1eddi gian \u1ee7 k\u00e9o d\u00e0i 5 \u0111\u1ebfn 6 ng\u00e0y r\u1ed3i \u0111em gieo.<\/p>\n

Gieo h\u1ea1t v\u00e0o v\u1ee5 \u0110\u00f4ng – Xu\u00e2n, tr\u01b0\u1edbc khi tr\u1ed3ng 12-16 th\u00e1ng.<\/p>\n

H\u1ea1t gieo v\u00e3i \u0111\u1ec1u tr\u00ean lu\u1ed1ng ho\u1eb7c gieo v\u00e0o b\u1ea7u. Trung b\u00ecnh 1kg h\u1ea1t gieo cho 50-70 m2<\/sup>.<\/p>\n

Gieo xong s\u00e0ng 1 l\u1edbp \u0111\u1ea5t nh\u1ecf d\u00e0y 0,6-0,7cm \u0111\u1ec3 ph\u1ee7 k\u00edn h\u1ea1t. Ph\u1ee7 m\u1ed9t l\u1edbp r\u01a1m r\u1ea1 ho\u1eb7c l\u00e1 th\u00f4ng \u0111\u00e3 kh\u1eed tr\u00f9ng l\u00ean m\u1eb7t lu\u1ed1ng \u0111\u1ec3 gi\u1eef \u1ea9m. Gieo xong r\u1eafc v\u00f4i b\u1ed9t quanh lu\u1ed1ng \u0111\u1ec3 ch\u1ed1ng Ki\u1ebfn, D\u1ebf x\u00e2m nh\u1eadp ph\u00e1 ho\u1ea1i.<\/p>\n

T\u01b0\u1edbi \u0111\u1ee7 \u1ea9m cho lu\u1ed1ng gieo m\u1ed7i ng\u00e0y 1 l\u1ea7n v\u00e0o s\u00e1ng s\u1edbm ho\u1eb7c chi\u1ec1u m\u00e1t, khi h\u1ea1t m\u1ecdc \u0111\u1ec1u th\u00ec d\u1ee1 b\u1ecf v\u1eadt che ph\u1ee7 v\u00e0 c\u1eafm r\u00e0ng r\u00e0ng ho\u1eb7c l\u00e0m d\u00e0n che 0,5-0,6. Sau 10-20 ng\u00e0y, c\u00e2y m\u1ea7m cao 3-5cm th\u00ec c\u1ea5y v\u00e0o b\u1ea7u Polyetylen c\u1ee1 8x15cm, \u0111\u1ee5c 6-8 l\u1ed7, d\u00e1n \u0111\u00e1y v\u00e0 c\u1eaft g\u00f3c, ru\u1ed9t b\u1ea7u 80% d\u1ea5t t\u1ea7ng A+B, 18% ph\u00e2n chu\u1ed3ng hoai, 2 % supe l\u00e2n.<\/p>\n

C\u0169ng c\u00f3 th\u1ec3 gieo nu\u00f4i c\u00e2y tr\u00ean lu\u1ed1ng \u0111\u1ec3 t\u1ea1o c\u00e2y t\u1ea1o c\u00e2y con r\u1ec5 tr\u1ea7n, tuy nhi\u00ean c\u1ea7n t\u1ec9a b\u1edbt c\u00e2y x\u1ea5u t\u1ea1o kho\u1ea3ng s\u1ed1ng th\u00edch h\u1ee3p cho c\u00e2y \u0111\u1ec3 l\u1ea1i.<\/p>\n

C\u1eafm r\u00e0ng r\u00e0ng ho\u1eb7c l\u00e0m gi\u00e0n che 0,5-0,6 che cho c\u00e2y, khi c\u00e2y cao 10-15cm gi\u1ea3m \u0111\u1ed9 t\u00e0n che xu\u1ed1ng c\u00f2n 0,4, c\u00e2y cao 15-20cm, gi\u1ea3m \u0111\u1ed9 t\u00e0n che xu\u1ed1ng c\u00f2n 0,3. Khi c\u00e2y \u0111\u01b0\u1ee3c 10 th\u00e1ng tu\u1ed5i d\u1ee1 b\u1ecf to\u00e0n b\u1ed9 gi\u00e0n che.<\/p>\n

Sau khi c\u1ea5y c\u00e2y 1 th\u00e1ng ti\u1ebfn h\u00e0nh t\u01b0\u1edbi th\u00fac ph\u00e2n NPK lo\u1ea1i 5:10:3 \u0111\u1ecbnh k\u1ef3 20-30 ng\u00e0y 1 l\u1ea7n cho \u0111\u1ebfn khi c\u00e2y \u0111\u01b0\u1ee3c 10 th\u00e1ng tu\u1ed5i. L\u01b0\u1ee3ng t\u01b0\u1edbi cho 1 v\u1ea1n c\u00e2y \u1edf l\u1ea7n 1 pha 0,5kg\/100 l\u00edt n\u01b0\u1edbc, l\u1ea7n 2 pha 1kg\/100 l\u00edt n\u01b0\u1edbc, l\u1ea7n 3 pha 1,5kg\/100 l\u00edt n\u01b0\u1edbc, c\u00e1c l\u1ea7n ti\u1ebfp theo pha 2kg\/100 l\u00edt n\u01b0\u1edbc, 3 l\u1ea7n cu\u1ed1i pha 1kg\/100 l\u00edt n\u01b0\u1edbc.<\/p>\n

L\u01b0u \u00fd n\u1ea5m b\u1ec7nh, nh\u1ed5 b\u1ecf c\u00e2y b\u1ec7nh \u0111em \u0111\u1ed1t, \u0111\u1ed3ng th\u1eddi phun ph\u00f2ng b\u1eb1ng thu\u1ed1c Bo\u00f3c \u0111\u00f4 n\u1ed3ng \u0111\u1ed9 0,2-0,4% cho c\u00e2y 10-90 ng\u00e0y tu\u1ed5i, 0,5% cho c\u00e2y 91-120 ng\u00e0y tu\u1ed5i, 1% phun cho c\u00e2y 121-300 ng\u00e0y tu\u1ed5i. L\u01b0\u1ee3ng phun 1 l\u00edt\/4m2<\/sup>.<\/p>\n

Ti\u00eau chu\u1ea9n c\u00e2y con \u0111em tr\u1ed3ng: C\u00e2y \u01b0\u01a1m 12-16 th\u00e1ng tu\u1ed5i, cao tr\u00ean 25cm, c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c 0,3-0,4cm, sinh tr\u01b0\u1edfng t\u1ed1t, c\u00e2n \u0111\u1ed1i, l\u00e1 xanh \u0111\u1eadm, th\u00e2n th\u1eb3ng, \u0111\u00e3 c\u00f3 3-4 c\u00e0nh, kh\u00f4ng s\u00e2u b\u1ec7nh, kh\u00f4ng c\u1ee5t ng\u1ecdn, ch\u01b0a ra b\u00fap non m\u1edbi.<\/p>\n

4. Tr\u00f4\u0300ng va\u0300 ch\u0103m so\u0301c r\u01b0\u0300ng<\/b><\/p>\n

Tr\u00f4\u0300ng vu\u0323 Xu\u00e2n l\u00e0 ch\u00ednh v\u00e0o cu\u1ed1i th\u00e1ng 2 \u0111\u1ebfn gi\u1eefa th\u00e1ng 4. Ch\u1ecdn ng\u00e0y r\u00e2m m\u00e1t, nhi\u1ec1u m\u00e2y m\u00f9 ho\u1eb7c c\u00f3 m\u01b0a ph\u00f9n th\u00ec c\u00e0ng t\u1ed1t \u0111\u1ec3 tr\u1ed3ng c\u00e2y v\u00e0 c\u00f3 th\u1ec3 tr\u1ed3ng c\u00e2y r\u1ec5 tr\u1ea7n. Tr\u00e1nh tr\u1ed3ng c\u00e2y v\u00e0o nh\u1eefng ng\u00e0y qu\u00e1 r\u00e9t, qu\u00e1 kh\u00f4.<\/p>\n

C\u00f3 th\u1ec3 tr\u1ed3ng v\u1ee5 Thu v\u00e0o th\u00e1ng 8-9 trong nh\u1eefng ng\u00e0y r\u00e2m m\u00e1t, nh\u01b0ng nh\u1ea5t thi\u1ebft ph\u1ea3i tr\u1ed3ng c\u00e2y c\u00f3 b\u1ea7u.<\/p>\n

N\u01a1i \u0111\u1ea5t d\u1ed1c d\u01b0\u1edbi 25o<\/sup> c\u00e2\u0300n ph\u00e1t tr\u1eafng s\u00e1t g\u1ed1c v\u00e0 d\u1ecdn s\u1ea1ch.<\/p>\n

N\u01a1i d\u1ed1c tr\u00ean 25o<\/sup> ph\u00e1t b\u0103ng theo \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c, b\u0103ng ch\u1eeba r\u1ed9ng 1m, b\u0103ng ph\u00e1t \u0111\u1ec3 tr\u1ed3ng r\u1ed9ng 1,5m song song v\u1edbi \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c, th\u1ef1c b\u00ec ph\u00e1t s\u1ea1ch, d\u1ecdn x\u1ebfp v\u00e0o b\u0103ng ch\u1eeba. X\u1eed l\u00fd th\u1ef1c b\u00ec xong tr\u01b0\u1edbc khi tr\u1ed3ng 1 th\u00e1ng.<\/p>\n

Tr\u1ed3ng thu\u1ea7n lo\u00e0i, m\u1eadt \u0111\u1ed9 2000 c\u00e2y\/ha, c\u1ef1 ly 2,5x2m.<\/p>\n

Cu\u1ed1c h\u1ed1 tr\u1ed3ng v\u1edbi k\u00edch th\u01b0\u1edbc 40x40x40 cm.<\/p>\n

B\u00f3n l\u00f3t m\u1ed7i h\u1ed1 100g NPK (5:10:3) v\u00e0 200g ph\u00e2n h\u1eefu c\u01a1 vi sinh, g\u1ea1t l\u1edbp \u0111\u1ea5t m\u1eb7t xu\u1ed1ng tr\u1ed9n \u0111\u1ec1u v\u1edbi ph\u00e2n, sau \u0111\u00f3 l\u1ea5p \u0111\u1ea5t ti\u1ebfp cho \u0111\u1ea7y h\u1ed1. \u0110\u1ea5t trong h\u1ed1 ph\u1ea3i t\u01a1i x\u1ed1p, s\u1ea1ch c\u1ecf v\u00e0 r\u1ec5 c\u00e2y. B\u00f3n ph\u00e2n, l\u1ea5p h\u1ed1 ho\u00e0n th\u00e0nh tr\u01b0\u1edbc khi tr\u1ed3ng 7-10 ng\u00e0y.<\/p>\n

Ch\u0103m s\u00f3c 3-4 n\u0103m li\u1ec1n, n\u0103m th\u1ee9 nh\u1ea5t 3 l\u1ea7n, g\u1ed3m ph\u00e1t quang c\u00e2y b\u1ee5i, c\u00e2y c\u1ecf, x\u1edbi \u0111\u1ea5t vun g\u1ed1c r\u1ed9ng 0,6-0,8m, tr\u1ed3ng d\u1eb7m c\u00e2y ch\u1ebft. T\u1ec9a b\u1ecf c\u00e1c ch\u1ed3i x\u1ea5u, gi\u1eef l\u1ea1i 1 th\u00e2n ch\u00ednh.<\/p>\n

N\u0103m th\u1ee9 hai ch\u0103m s\u00f3c 2 l\u1ea7n g\u1ed3m ph\u00e1t c\u00e2y b\u1ee5i, c\u00e2y c\u1ecf, vun x\u1edbi \u0111\u1ea5t quanh g\u1ed1c r\u1ed9ng 0,8-1m, k\u1ebft h\u1ee3p b\u00f3n cho m\u1ed7i g\u1ed1c 100g NPK lo\u1ea1i 5:10:3 v\u00e0 300g ph\u00e2n h\u1eefu c\u01a1 vi sinh. T\u1ec9a b\u1ecf c\u00e1c ch\u1ed3i x\u1ea5u, gi\u1eef l\u1ea1i 1 th\u00e2n ch\u00ednh.<\/p>\n

N\u0103m th\u1ee9 ba, th\u1ee9 4 ch\u0103m s\u00f3c 2 l\u1ea7n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 n\u0103m th\u1ee9 2.<\/p>\n

Vi\u1ec7c x\u1edbi \u0111\u1ea5t, vun g\u1ed1c theo tr\u00ecnh t\u1ef1 n\u00f4ng, h\u1eb9p, sau s\u00e2u, r\u1ed9ng d\u1ea7n, \u0111\u1ec3 t\u1edbi n\u0103m th\u1ee9 ba, t\u01b0 \u0111\u1ee7 vun v\u00e0o g\u1ed1c m\u1ed9t l\u1edbp \u0111\u1ea5t d\u00e0y 20-30cm v\u00e0 \u0111\u01b0\u1eddng k\u00ednh quanh g\u1ed1c r\u1ed9ng 1,0m.<\/p>\n

5. Khai tha\u0301c, s\u01b0\u0309 du\u0323ng<\/b><\/p>\n

G\u1ed7 Sa mu th\u01a1m, l\u00f5i m\u00e0u v\u00e0ng, ho\u1eb7c \u0111\u1ecf nh\u1ea1t, gi\u1eefa l\u00f5i v\u00e0 gi\u00e1c kh\u00f4ng ph\u00e2n bi\u1ec7t r\u00f5. G\u1ed7 nh\u1eb9, th\u1edb th\u1eb3ng, b\u1ec1n \u0111\u1eb9p, \u00edt b\u1ecb m\u1ed1i, m\u1ecdt, s\u00e2u, n\u1ea5m \u0103n h\u1ea1i, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ee9c \u00e9p ngang, s\u1ee9c k\u00e9o v\u00e0 s\u1ee9c u\u1ed1n cong cao, d\u1ec5 c\u01b0a x\u1ebb, b\u00e0o tr\u01a1n, \u0111\u00e1nh b\u00f3ng, \u0111\u01b0\u1ee3c d\u00f9ng v\u00e0o nhi\u1ec1u c\u00f4ng vi\u1ec7c nh\u01b0 l\u00e0m c\u1ed9t bu\u1ed3m, \u0111\u00f3ng t\u00e0u thuy\u1ec1n, c\u1ed9t \u0111i\u1ec7n, tr\u1ee5 m\u1ecf, \u0111\u1ed3 gia d\u1ee5ng. V\u1ecf, r\u1ec5, l\u00e1 c\u00e2y c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m thu\u1ed1c.<\/p>\n

H\u00ecnh d\u00e1ng c\u00e2y Sa mu \u0111\u1eb9p n\u00ean c\u0169ng \u0111\u01b0\u1ee3c tr\u1ed3ng c\u00e2y l\u00e0m phong c\u1ea3nh n\u01a1i c\u00f4ng s\u1edf, ven \u0111\u01b0\u1eddng, quanh nh\u00e0 ho\u1eb7c tr\u1ed3ng quanh \u0111\u1ed3i \u0111\u1ec3 ng\u0103n tr\u00e2u b\u00f2 ph\u00e1 ho\u1ea1i hoa m\u00e0u.<\/p>\n

R\u1eebng tr\u1ed3ng sau 5 n\u0103m c\u1ea7n \u0111\u01b0\u1ee3c t\u1ec9a th\u01b0a, \u0111\u1ec3 t\u1ea1o c\u00e2y c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng cao, \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 t\u00e0n che, lo\u1ea1i tr\u1eeb nh\u1eefng c\u00e2y sinh tr\u01b0\u1edfng k\u00e9m, h\u00ecnh th\u00e2n x\u1ea5u, b\u1ecb s\u00e2u b\u1ec7nh h\u1ea1i. M\u1eadt \u0111\u1ed9 \u0111\u1ec3 l\u1ea1i l\u00fac khai th\u00e1c ch\u00ednh c\u00f2n 1000-1200 c\u00e2y\/ha.<\/p>\n

R\u1eebng Sa mu c\u00f3 tr\u1eef l\u01b0\u1ee3ng cao, \u0111\u1ea1t t\u1edbi 300-400 m3<\/sup>\/ha, t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh 15-20 m3<\/sup>\/ha\/n\u0103m.<\/p>\n","protected":false},"excerpt":{"rendered":"

SA MU T\u00ean kh\u00e1c: Sa m\u00f4\u0323c T\u00ean khoa h\u1ecdc: Cunninghamia lanceolata (Lamb.) Hook. H\u1ecd th\u1ef1c v\u1eadt: B\u1ee5t m\u1ecdc (Taxodiaceae) 1. \u0110\u0103\u0323c \u0111i\u00ea\u0309m hi\u0300nh tha\u0301i C\u00e2y g\u1ed7 l\u1edbn, cao tr\u00ean 30 m, \u0111\u01b0\u1eddng k\u00ednh c\u00f3 th\u1ec3 t\u1edbi tr\u00ean 200 cm. Th\u00e2n tr\u00f2n v\u00e0 r\u1ea5t th\u1eb3ng. V\u1ecf n\u00e2u ho\u1eb7c x\u00e1m n\u00e2u, n\u1ee9t d\u1ecdc. Ph\u00e2n c\u00e0nh th\u1ea5p, c\u00e0nh […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":[],"categories":[82],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13271"}],"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=13271"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13271\/revisions"}],"predecessor-version":[{"id":20199,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13271\/revisions\/20199"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=13271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=13271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=13271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}