{"id":12912,"date":"2014-05-16T15:48:32","date_gmt":"2014-05-16T08:48:32","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=12912"},"modified":"2014-05-14T15:53:54","modified_gmt":"2014-05-14T08:53:54","slug":"ky-thuat-trong-duoc-voi","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ky-thuat-trong-duoc-voi\/","title":{"rendered":"K\u1ef9 thu\u1eadt tr\u1ed3ng \u0110\u01b0\u1edbc v\u00f2i"},"content":{"rendered":"

\u0110\u01af\u01a0\u0301C VO\u0300I<\/b><\/p>\n

T\u00ean kh\u00e1c: \u0110\u00e2ng<\/p>\n

T\u00ean khoa h\u1ecdc:\u00a0\u00a0\u00a0\u00a0\u00a0 Rhizophora stylosa<\/i> Griff<\/p>\n

H\u1ecd th\u1ef1c v\u1eadt: \u0110\u01b0\u1edbc (Rhizophoraceae)<\/p>\n

(Ngu\u1ed3n ch\u00ednh: Ng\u00f4 \u0110\u00ecnh Qu\u1ebf, 2010)<\/em><\/p>\n

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

\u0110\u01b0\u1edbc v\u00f2i l\u00e0 c\u00e2y th\u00e2n g\u1ed7 cao 2-8m. L\u00e1 \u0111\u01a1n h\u00ecnh b\u1ea7u d\u1ee5c h\u01a1i d\u00e0i, ch\u00f3p c\u00f3 m\u0169i nh\u1ecdn. L\u00e1 to, d\u1ea7y v\u00e0 b\u00f3ng d\u00e0i 10-12 cm, r\u1ed9ng kho\u1ea3ng 6-8 cm.<\/p>\n

C\u1ee5m hoa h\u00ecnh t\u00e1n c\u00f3 3-4 nh\u00e1nh, m\u1ed7i nh\u00e1nh c\u00f3 5-6 hoa. Qu\u1ea3 c\u00f3 h\u00ecnh qu\u1ea3 l\u00ea nh\u1ecf khi c\u00f2n non, tr\u01a1n, m\u1ea7u n\u00e2u. Qu\u1ea3 bao g\u1ed3m c\u1ea3 tr\u1ee5 m\u1ea7m d\u00e0i 25-40 cm.<\/p>\n

C\u00e2y ra hoa v\u00e0o th\u00e1ng 3, th\u00e1ng 4 l\u00e0 lo\u00e0i c\u00e2y c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng \u201csinh c\u00e2y con tr\u00ean c\u00e2y m\u1eb9\u201d.<\/p>\n

\"\u0110uoc<\/a><\/p>\n

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

Ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean t\u01b0\u01a1ng \u0111\u1ed1i r\u1ed9ng tr\u00ean c\u00e1c lo\u1ea1i \u0111\u1ea5t ng\u1eadp n\u01b0\u1edbc m\u1eb7n ven bi\u1ec3n mi\u1ec1n B\u1eafc Vi\u1ec7t Nam.<\/p>\n

C\u00e1c v\u00f9ng c\u00f3 r\u1eebng \u0110\u01b0\u1edbc v\u00f2i ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean v\u00e0 tr\u1ed3ng r\u1eebng \u0110\u01b0\u1edbc v\u00f2i sinh tr\u01b0\u1edfng t\u1ed1t \u1edf mi\u1ec1n B\u1eafc Vi\u1ec7t Nam l\u00e0 n\u01a1i c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m kh\u00ed h\u1eadu nhi\u1ec7t \u0111\u1edbi \u1ea9m, bi\u1ebfn t\u00ednh c\u00f3 m\u00f9a \u0111\u00f4ng l\u1ea1nh.<\/p>\n

Nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh n\u0103m 22,2-24\u00baC. Trong n\u0103m c\u00f3 1 \u0111\u1ebfn 4 th\u00e1ng l\u1ea1nh (th\u00e1ng c\u00f3 nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh d\u01b0\u1edbi 20\u00baC), ri\u00eang v\u00f9ng \u0110\u00f4ng B\u1eafc (t\u1ec9nh Qu\u1ea3ng Ninh), trong n\u0103m c\u00f3 t\u1edbi 120 ng\u00e0y l\u1ea1nh, c\u00f3 nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh trong ng\u00e0y d\u01b0\u1edbi 20\u00baC, trong s\u1ed1 120 ng\u00e0y l\u1ea1nh c\u00f3 t\u1edbi 80 ng\u00e0y nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh d\u01b0\u1edbi 15\u00baC.<\/p>\n

Th\u00edch nghi v\u1edbi lo\u1ea1i \u0111\u1ea5t b\u00f9n pha c\u00e1t, m\u1ecdc ch\u1ee7 y\u1ebfu n\u01a1i th\u1ee7y tri\u1ec1u cao v\u00e0 trung b\u00ecnh, \u01b0a \u0111\u1ed9 m\u1eb7n n\u01b0\u1edbc bi\u1ec3n cao (20-34 \u2030). Th\u00e2n c\u00e2y tr\u00f2n v\u00e0 th\u1eb3ng, ph\u00e2n nh\u00e1nh nhi\u1ec1u v\u00e0 s\u1edbm h\u01a1n c\u00e2y \u0110\u01b0\u1edbc \u0111\u00f4i \u1edf Nam B\u1ed9, r\u1ec5 c\u00e2y h\u00ecnh n\u01a1m c\u00f3 nhi\u1ec1u r\u1ec5 ch\u1ed1ng ph\u00e1t tri\u1ec3n.<\/p>\n

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

\u0110\u1ec3 ch\u1ee7 \u0111\u1ed9ng c\u00e2y gi\u1ed1ng tr\u1ed3ng r\u1eebng tr\u00e1nh m\u00f9a m\u01b0a b\u00e3o ho\u1eb7c ch\u1ee7 \u0111\u1ed9ng c\u00e2y gi\u1ed1ng \u0111\u1ec3 tr\u1ed3ng d\u1eb7m, c\u00f3 th\u1ec3 gieo \u01b0\u01a1m trong b\u1ea7u t\u1ea1i v\u01b0\u1eddn \u01b0\u01a1m.<\/p>\n

V\u01b0\u1eddn \u01b0\u01a1m ph\u1ea3i g\u1ea7n n\u01a1i tr\u1ed3ng r\u1eebng v\u00e0 thu\u1eadn l\u1ee3i cho vi\u1ec7c v\u1eadn chuy\u1ec3n c\u00e2y con.<\/p>\n

V\u01b0\u1eddn \u01b0\u01a1m b\u1ed1 tr\u00ed v\u00e0 l\u1ef1a ch\u1ecdn c\u1ea9n th\u1eadn \u1edf n\u01a1i ng\u1eadp tri\u1ec1u trung b\u00ecnh trong n\u0103m, c\u00f3 b\u1edd bao xung quanh \u0111\u1ec3 b\u1ea3o v\u1ec7.<\/p>\n

V\u01b0\u1eddn ph\u1ea3i \u0111\u1eb7t xa n\u01a1i ngu\u1ed3n b\u1ec7nh v\u00e0 t\u00e1ch r\u1eddi xa khu canh t\u00e1c n\u00f4ng nghi\u1ec7p, n\u01a1i ch\u0103n th\u1ea3 gia s\u00fac, tr\u00e1nh n\u01a1i thu\u1ef7 tri\u1ec1u r\u00fat qu\u00e1 nhanh, n\u01a1i hay b\u1ecb ph\u00f9 sa b\u1ed3i l\u1eafng.<\/p>\n

Ngu\u1ed3n gi\u1ed1ng \u0111\u01b0\u1ee3c thu, h\u00e1i trong r\u1eebng ng\u1eadp m\u1eb7n n\u01a1i c\u00f3 \u0111\u01b0\u1edbc v\u00f2i ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean. M\u00f9a qu\u1ea3 ch\u00edn t\u1eeb th\u00e1ng 7-8.<\/p>\n

Thu l\u01b0\u1ee3m tr\u1ee5 m\u1ea7m ch\u00edn tr\u00ean m\u1eb7t n\u01b0\u1edbc, khi thu\u1ef7 tri\u1ec1u \u0111\u01b0a ra bi\u1ec3n r\u1ed3i d\u1ea1t v\u00e0o nh\u1eefng b\u1edd bi\u1ec3n thoai tho\u1ea3i ho\u1eb7c thu h\u00e1i tr\u1ef1c ti\u1ebfp t\u1eeb c\u00e2y m\u1eb9 b\u1eb1ng c\u00e1ch rung cho tr\u1ee5 m\u1ea7m r\u1ee5ng xu\u1ed1ng. Tr\u1ee5 m\u1ea7m khi ch\u00edn c\u00f3 m\u1ea7u h\u01a1i v\u00e0ng, gi\u1eefa qu\u1ea3 v\u00e0 tr\u1ee5 m\u1ea7m xu\u1ea5t hi\u1ec7n v\u00f2ng nh\u1eabn d\u00e0i 1-1,5cm, ph\u00ecnh to c\u00f3 m\u1ea7u n\u00e2u x\u00e1m, khi \u0111\u00f3 tr\u1ee5 m\u1ea7m d\u1ec5 d\u00e0ng t\u00e1ch ra kh\u1ecfi qu\u1ea3. N\u1ebfu qu\u1ea3 ch\u01b0a xu\u1ea5t hi\u1ec7n v\u00f2ng nh\u1eabn l\u00e0 qu\u1ea3 v\u1eabn \u1edf giai \u0111o\u1ea1n c\u00f2n non.<\/p>\n

Khi ch\u00edn tr\u1ee5 m\u1ea7m d\u00e0i 25-45cm, 1kg ch\u1ee9a 52-57 tr\u1ee5 m\u1ea7m, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m 90- 98%.<\/p>\n

Tr\u1ee5 m\u1ea7m sau khi thu h\u00e1i v\u1ec1 ph\u1ea3i ti\u1ebfn h\u00e0nh ph\u00e2n lo\u1ea1i. Lo\u1ea1i b\u1ecf nh\u1eefng tr\u1ee5 m\u1ea7m c\u00f2n non khi ch\u01b0a r\u1eddi kh\u1ecfi qu\u1ea3, nh\u1eefng tr\u1ee5 m\u1ea7m b\u1ecb s\u00e2u b\u1ec7nh, b\u1ecb c\u00e1y, c\u00f2ng c\u1eafn ngang th\u00e2n, b\u1ecb m\u1ea5t l\u00e1 m\u1ea7m. Kh\u00f4ng ch\u1ecdn nh\u1eefng tr\u1ee5 m\u1ea7m c\u00f3 nh\u1eefng ch\u1ea5m m\u1ea7u n\u00e2u x\u1eabm, bi\u1ec3u hi\u1ec7n ph\u1ea7n m\u00f4 ph\u00eda trong \u0111\u00e3 b\u1ecb ch\u1ebft. B\u00f3 th\u00e0nh c\u00e1c b\u00f3 s\u1ed1 l\u01b0\u1ee3ng trung b\u00ecnh 20- 30 tr\u1ee5 m\u1ea7m \u0111\u1ec3 ti\u1ec7n cho b\u1ea3o qu\u1ea3n v\u00e0 v\u1eadn chuy\u1ec3n.<\/p>\n

Tr\u1ee5 m\u1ea7m gi\u1ea3m t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m r\u1ea5t nhanh khi \u1edf \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng, do \u0111\u00f3 sau khi thu h\u00e1i v\u1ec1 ph\u1ea3i c\u1ea5y v\u00e0o b\u1ea7u ngay, khi kh\u00f4ng c\u1ea5y k\u1ecbp th\u1eddi c\u1ea7n b\u1ea3o qu\u1ea3n b\u1eb1ng c\u00e1ch:<\/p>\n

– X\u1ebfp c\u00e1c tr\u1ee5 m\u1ea7m xu\u1ed1ng b\u00e3i c\u00f3 ng\u1eadp thu\u1ef7 tri\u1ec1u d\u00f9ng l\u01b0\u1edbi qu\u00e2y l\u1ea1i \u0111\u1ec3 tr\u00e1nh n\u01b0\u1edbc cu\u1ed1n tr\u00f4i<\/p>\n

– X\u1ebfp th\u00e0nh \u0111\u1ed1ng \u1edf n\u01a1i r\u00e2m m\u00e1t, ph\u1ee7 bao gai, h\u00e0ng ng\u00e0y t\u01b0\u1edbi n\u01b0\u1edbc \u0111\u1ec3 gi\u1eef \u1ea9m.<\/p>\n

– Th\u1eddi gian b\u1ea3o qu\u1ea3n kh\u00f4ng qu\u00e1 15 ng\u00e0y.<\/p>\n

D\u00f9ng b\u1ea7u Polyetylen m\u1ea7u tr\u1eafng \u0111\u1ee5c hay \u0111en. B\u1ea3o \u0111\u1ea3m \u0111\u1ed9 b\u1ec1n cao \u0111\u1ec3 khi \u0111\u00f3ng b\u1ea7u, ch\u1ecbu \u0111\u01b0\u1ee3c ng\u00e2m trong n\u01b0\u1edbc bi\u1ec3n ho\u1eb7c qu\u00e1 tr\u00ecnh ch\u0103m s\u00f3c v\u1eadn chuy\u1ec3n c\u00e2y con \u0111i tr\u1ed3ng r\u1eebng kh\u00f4ng b\u1ecb h\u01b0 h\u1ecfng.<\/p>\n

S\u1eed d\u1ee5ng t\u00fai b\u1ea7u c\u00f3 \u0111\u00e1y, \u0111\u01b0\u1eddng k\u00ednh 15cm, cao 20cm, \u0111\u1ee5c c\u00e1c l\u1ed7 nh\u1ecf c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 0,5cm xung quanh \u0111\u1ec3 tho\u00e1t n\u01b0\u1edbc.<\/p>\n

S\u1eed d\u1ee5ng 95% lo\u1ea1i \u0111\u1ea5t c\u00e1t pha ng\u1eadp thu\u1ef7 tri\u1ec1u h\u00e0ng ng\u00e0y \u0111\u1ec3 \u0111\u00f3ng b\u1ea7u (\u0111\u1ea5t \u0111\u01b0\u1ee3c l\u1ea5y \u1edf t\u1ea7ng m\u1eb7t c\u00f3 \u0111\u1ed9 s\u00e2u 0-20cm, pH= 6,5-7,2; t\u1ed5ng mu\u1ed1i tan 1,3-1,6%, c\u00e1t 35%, s\u00e9t 25%, limon 40%). Tr\u1ed9n \u0111\u1ea5t v\u1edbi 3% supe l\u00e2n L\u00e2m Thao v\u00e0 1-2% ph\u00e2n b\u00f2 kh\u00f4 t\u00ednh theo tr\u1ecdng l\u01b0\u1ee3ng b\u1ea7u.<\/p>\n

Trang m\u1eb7t lu\u1ed1ng cho ph\u1eb3ng, nh\u1eb7t s\u1ea1ch c\u1ecf. K\u00edch th\u01b0\u1edbc lu\u1ed1ng \u0111\u1eb7t b\u1ea7u 1,2m x 1,2m, hai lu\u1ed1ng c\u00e1ch nhau 50cm, c\u00f3 r\u00e3nh tho\u00e1t n\u01b0\u1edbc khi th\u1ee7y tri\u1ec1u r\u00fat.<\/p>\n

X\u1ebfp b\u1ea7u theo h\u00e0ng, c\u1ee9 hai h\u00e0ng \u0111\u1ec3 c\u00e1ch m\u1ed9t h\u00e0ng, l\u1ea5p \u0111\u1ea5t xung quanh lu\u1ed1ng \u0111\u1ec3 gi\u1eef b\u1ea7u.<\/p>\n

T\u1eeb th\u00e1ng th\u1ee9 hai c\u1ee9 2 th\u00e1ng \u0111\u1ea3o b\u1ea7u m\u1ed9t l\u1ea7n, b\u1eb1ng c\u00e1ch d\u1ecbch chuy\u1ec3n b\u1ea7u \u0111\u1ec3 tr\u00e1nh r\u1ec5 c\u1eafm s\u00e2u v\u00e0o \u0111\u1ea5t. Ti\u1ebfn h\u00e0nh \u0111\u1ea3o b\u1ea7u k\u1ebft h\u1ee3p v\u1edbi\u00a0 ph\u00e2n lo\u1ea1i c\u00e2y v\u00e0o th\u1eddi gian thu\u1ef7 tri\u1ec1u r\u00fat.<\/p>\n

Tr\u1ee5 m\u1ea7m c\u1ea5y tr\u1ef1c ti\u1ebfp 1\/3 chi\u1ec1u d\u00e0i v\u00e0o b\u1ea7u \u0111\u1ea5t. M\u1ed7i b\u1ea7u ch\u1ec9 c\u1ea5y 1 tr\u1ee5 m\u1ea7m. C\u1ea5y tr\u1ee5 m\u1ea7m v\u00e0o ng\u00e0y r\u00e2m m\u00e1t, tr\u00e1nh ng\u00e0y m\u01b0a b\u00e3o.<\/p>\n

H\u00e0ng ng\u00e0y g\u1ee1 b\u1ecf rong, r\u00eau, v\u1eadt c\u1ea3n b\u00e1m v\u00e0o tr\u1ee5 m\u1ea7m. Sau khi c\u1ea5y tr\u1ee5 m\u1ea7m th\u01b0\u1eddng b\u1ecb m\u1ed9t s\u1ed1 lo\u00e0i gi\u00e1p x\u00e1c, th\u00e2n m\u1ec1m, ch\u00e2n b\u1ee5ng, cua c\u00f2ng, \u1ed1c bi\u1ec3n, h\u00e0 sun,\u2026t\u1ea5n c\u00f4ng. V\u00ec v\u1eady, th\u01b0\u1eddng xuy\u00ean theo d\u00f5i b\u1eaft b\u1ecf c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt n\u00e0y \u0111\u1ec1 ph\u00f2ng c\u1eafn n\u00e1t tr\u1ee5 m\u1ea7m.<\/p>\n

Sau khi c\u1ea5y v\u00e0o b\u1ea7u 12-15 ng\u00e0y, tr\u1ee5 m\u1ea7m b\u1eaft \u0111\u1ea7u n\u1ea3y m\u1ea7m v\u00e0 ra r\u1ec5 c\u1ea5p 1, sau 20 ng\u00e0y t\u1ea5t c\u1ea3 c\u00e1c tr\u1ee5 m\u1ea7m \u0111\u1ec1u ra c\u1eb7p l\u00e1 th\u1ee9 nh\u1ea5t, t\u1ef7 l\u1ec7 s\u1ed1ng cao\u00a0 \u0111\u1ea1t t\u1edbi 95- 98%. Sau th\u1eddi gian n\u00e0y tr\u1ee5 m\u1ea7m n\u00e0o kh\u00f4ng ra l\u00e1 c\u1ea7n ti\u1ebfn h\u00e0nh c\u1ea5y d\u1eb7m ngay.<\/p>\n

Ti\u00eau chu\u1ea9n c\u00e2y xu\u1ea5t v\u01b0\u1eddn: <\/b>C\u00e2y \u01b0\u01a1m 5-6 th\u00e1ng tu\u1ed5i, \u0111\u01b0\u1eddng k\u00ednh tr\u1ee5 m\u1ea7m 0,5-0,6cm, chi\u1ec1u cao tr\u1ee5 m\u1ea7m 21-25cm, c\u00f3 6 l\u00e1, tr\u00ean c\u00e2y c\u00f3 3 \u0111\u1ed1t, kh\u00f4ng b\u1ecb nhi\u1ec5m b\u1ec7nh, kh\u00f4ng b\u1ecb c\u1ee5t ng\u1ecdn.<\/p>\n

\"\u0110uoc<\/a><\/p>\n

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

\u0110\u1ea5t tr\u1ed3ng \u0111\u01b0\u1edbc v\u00f2i l\u00e0 \u0111\u1ea5t ph\u00f9 sa tr\u00ean c\u00e1c b\u00e3i \u0111\u1ea5t ng\u1eadp m\u1eb7n ven bi\u1ec3n, c\u00f3 m\u1ee9c \u0111\u1ed9 ng\u1eadp tri\u1ec1u trung b\u00ecnh. \u0110\u1ea5t c\u00f3 \u0111\u1ed9 th\u00e0nh th\u1ee5c trung b\u00ecnh t\u1eeb b\u00f9n ch\u1eb7t \u0111\u1ebfn s\u00e9t m\u1ec1m.<\/p>\n

\u0110\u1ed9 m\u1eb7n n\u01b0\u1edbc bi\u1ec3n th\u00edch h\u1ee3p n\u01a1i tr\u1ed3ng r\u1eebng t\u1eeb 15- 25%o.<\/p>\n

Tr\u00ean d\u1ea1ng \u0111\u1ea5t s\u00e9t r\u1eafn ch\u1eafc, \u0111i kh\u00f4ng l\u00fan m\u00e0 ch\u1ec9 ng\u1eadp n\u01b0\u1edbc khi thu\u1ef7 tri\u1ec1u cao b\u1ea5t th\u01b0\u1eddng hay \u0111\u1ea5t nhi\u1ec1u c\u00e1t, m\u1eb7t \u0111\u1ea5t c\u00f3 nhi\u1ec1u c\u1ecf ch\u1ecbu m\u1eb7n, tr\u1ed3ng r\u1eebng c\u00e2y sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n r\u1ea5t k\u00e9m.<\/p>\n

Tr\u1ed3ng thu\u1ea7n lo\u00e0i, b\u1ed1 tr\u00ed theo h\u00ecnh vu\u00f4ng hay nanh s\u1ea5u. Tr\u1ed3ng h\u1ed7n giao theo h\u00e0ng v\u1edbi m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y nh\u01b0 S\u00fa, Trang tu\u1ef3 theo \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba t\u1eebng v\u00f9ng. C\u0169ng c\u00f3 th\u1ec3 tr\u1ed3ng h\u1ed7n giao theo \u0111\u00e1m v\u1edbi Trang, S\u00fa.<\/p>\n

M\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng 10000c\u00e2y\/ha, c\u1ef1 ly 1,0m x 1,0m<\/p>\n

Tr\u1ed3ng r\u1eebng tr\u1ef1c ti\u1ebfp b\u1eb1ng tr\u1ee5 m\u1ea7m v\u00e0o th\u00e1ng 7 \u0111\u1ebfn th\u00e1ng 8. Tr\u1ed3ng b\u1eb1ng c\u00e2y con c\u00f3 b\u1ea7u v\u00e0o th\u00e1ng 3-5.<\/p>\n

Tr\u1ed3ng c\u00e2y khi thu\u1ef7 tri\u1ec1u r\u00fat. D\u00f9ng d\u00e2y nilon th\u1eaft n\u00fat chia th\u00e0nh c\u00e1c \u0111o\u1ea1n 1m, k\u00e9o th\u1eb3ng h\u00e0ng \u0111\u1ec3 tr\u1ed3ng \u0111\u00fang kho\u1ea3ng c\u00e1ch. Bi\u1ec7n ph\u00e1p d\u1ec5 l\u00e0m nh\u1ea5t l\u00e0 d\u00f9ng m\u1ed9t \u0111o\u1ea1n tre b\u01b0\u01a1ng ho\u1eb7c lu\u1ed3ng d\u00e0i 3m, l\u1eafp r\u0103ng d\u00e0i 10cm v\u1edbi kho\u1ea3ng c\u00e1ch 1m x 1m (Gi\u1ed1ng nh\u01b0 m\u1ed9t c\u00e0o c\u1ecf). M\u1ed9t ng\u01b0\u1eddi c\u1ea7m c\u00e0o n\u00e0y k\u00e9o theo m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng tr\u00ean m\u1eb7t b\u00f9n. Sau \u0111\u00f3 l\u1ea1i d\u00f9ng c\u00e0o k\u00e9o theo chi\u1ec1u vu\u00f4ng g\u00f3c t\u1ea1o th\u00e0nh nh\u1eefng \u00f4 vu\u00f4ng th\u1eb3ng h\u00e0ng ngang d\u1ecdc.<\/p>\n

\u0110\u1ed1i v\u1edbi c\u00e2y c\u00f3 b\u1ea7u th\u00ec r\u1ea1ch v\u1ecf b\u1ea7u tr\u01b0\u1edbc khi tr\u1ed3ng. Kh\u00f4ng l\u00e0m \u0111\u1ee9t r\u1ec5 \u0111\u1ec3 tr\u00e1nh x\u00e2m nh\u1eadp m\u1eb7n c\u00e2y d\u1ec5 b\u1ecb ch\u1ebft.<\/p>\n

\u0110\u1ed1i v\u1edbi tr\u1ee5 m\u1ea7m c\u1eafm 1\/3 chi\u1ec1u d\u00e0i tr\u1ee5 m\u1ea7m xu\u1ed1ng \u0111\u1ea5t, nghi\u00eang m\u1ed9t g\u00f3c 45o<\/sup> theo chi\u1ec1u n\u01b0\u1edbc thu\u1ef7 tri\u1ec1u r\u00fat, \u0111\u1ec3 tr\u00e1nh n\u01b0\u1edbc cu\u1ed1n tr\u00f4i tr\u1ee5 m\u1ea7m khi n\u01b0\u1edbc tri\u1ec1u r\u00fat xu\u1ed1ng. Tr\u00ean d\u1ea1ng \u0111\u1ea5t c\u00e1t, \u0111\u1ea5t c\u1ee9ng, \u00edt ph\u00f9 sa ph\u1ea3i d\u00f9ng m\u1ed9t g\u1eady tre v\u00f3t nh\u1ecdn \u0111\u1ea7u, \u0111\u01b0\u1eddng k\u00ednh 1,5- 2cm ch\u1ecdc l\u1ed7 \u0111\u1ec3 c\u1eafm tr\u1ee5 m\u1ea7m xu\u1ed1ng \u0111\u1ea5t.<\/p>\n

Ch\u0103m s\u00f3c 3 n\u0103m li\u1ec1n. Sau khi tr\u1ed3ng r\u1eebng t\u1eeb 3-6 th\u00e1ng, c\u1ea7n v\u1edbt b\u1ecf rong, r\u00eau, t\u1ea3o b\u00e1m tr\u00ean th\u00e2n, l\u00e1 (n\u1ebfu c\u00f3) t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e2y con quang h\u1ee3p t\u1ed1t.<\/p>\n

B\u1eaft cua, c\u00f2ng, \u1ed1c \u0103n l\u00e1 c\u00e2y. Khi ph\u00e1t hi\u1ec7n s\u00e2u non d\u00f9ng tay b\u1eaft gi\u1ebft, ho\u1eb7c rung c\u00e2y cho s\u00e2u r\u01a1i \u0111\u1ec3 gi\u1ebft.<\/p>\n

B\u1ea3o v\u1ec7 c\u00e1c lo\u00e0i k\u00fd sinh\u00a0 thi\u00ean \u0111\u1ecbch nh\u01b0 chim \u0103n s\u00e2u, m\u1ed9t s\u1ed1 lo\u00e0i c\u00f4n tr\u00f9ng c\u00f3 l\u1ee3i nh\u01b0 b\u1ecd ng\u1ef1a, c\u00e1c lo\u00e0i ong k\u00fd sinh tr\u00ean tr\u1ee9ng v\u00e0 s\u00e2u non c\u1ee7a s\u00e2u h\u1ea1i c\u00e2y ng\u1eadp m\u1eb7n.<\/p>\n

Ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng c\u00e1c ch\u1ebf ph\u1ea9m sinh h\u1ecdc trong vi\u1ec7c ph\u00f2ng tr\u1eeb s\u00e2u h\u1ea1i nh\u01b0 c\u00e1c ch\u1ebf ph\u1ea9m Beauverine (B.B), Bacilline (B.T), Virut, Metarrhizium.<\/p>\n

Ch\u1ec9 s\u1eed d\u1ee5ng bi\u1ec7n ph\u00e1p phun thu\u1ed1c ho\u00e1 ch\u1ea5t trong tr\u01b0\u1eddng h\u1ee3p s\u00e2u h\u1ea1i xu\u1ea5t hi\u1ec7n lan tr\u00e0n v\u1edbi m\u1eadt \u0111\u1ed9 cao, c\u00f3 nguy c\u01a1 b\u00f9ng n\u1ed5 th\u00e0nh d\u1ecbch. N\u00ean s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i thu\u1ed1c c\u00f3 ngu\u1ed3n g\u1ed1c th\u1ef1c v\u1eadt, ch\u00f3ng ph\u00e2n gi\u1ea3i, \u00edt \u0111\u1ed9c h\u1ea1i v\u1edbi ng\u01b0\u1eddi v\u00e0 gia s\u00fac nh\u01b0 c\u00e1c lo\u1ea1i thu\u1ed1c c\u00f3 g\u1ed1c Perythroide.<\/p>\n

Sau khi tr\u1ed3ng r\u1eebng ti\u1ebfn h\u00e0nh \u0111\u00e1nh gi\u00e1 di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng so v\u1edbi di\u1ec7n t\u00edch thi\u1ebft k\u1ebf, di\u1ec7n t\u00edch n\u00e0y ph\u1ea3i \u0111\u1ea3m b\u1ea3o theo thi\u1ebft k\u1ebf khi \u0111\u1ed1i chi\u1ebfu gi\u1eefa b\u1ea3n \u0111\u1ed3 v\u00e0 th\u1ee9c \u0111\u1ecba. \u0110\u00e1nh gi\u00e1 ti\u00eau chu\u1ea9n c\u00e2y tr\u1ed3ng sau 3 th\u00e1ng theo c\u00e1c ch\u1ec9 ti\u00eau sau:<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 * Tr\u1ed3ng r\u1eebng t\u1eeb c\u00e2y gieo \u01b0\u01a1m:<\/i><\/b><\/p>\n

T\u1ef7 l\u1ec7 s\u1ed1ng l\u1edbn h\u01a1n 90% l\u00e0 \u0111\u1ea3m b\u1ea3o t\u1ef7 l\u1ec7 th\u00e0nh r\u1eebng (theo quy \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi c\u00e2y ng\u1eadp m\u1eb7n l\u00e0 70%).<\/p>\n

Chi\u1ec1u cao trung b\u00ecnh (t\u00ednh c\u1ea3 tr\u1ee5 m\u1ea7m v\u00e0 tr\u00ean tr\u1ee5 m\u1ea7m) t\u1eeb 62-65cm. C\u00e2y b\u1eaft \u0111\u1ea7u ph\u00e2n c\u00e0nh c\u1ea5p 1.<\/p>\n

\u0110\u01b0\u1eddng k\u00ednh tr\u00ean \u0111\u1ed1t 1 t\u1eeb 0,6- 0,8cm, s\u1ed1 l\u00e1 trung b\u00ecnh m\u1ed9t c\u00e2y 8-10 l\u00e1.<\/p>\n

* Tr\u1ed3ng r\u1eebng tr\u1ef1c ti\u1ebfp b\u1eb1ng tr\u1ee5 m\u1ea7m:<\/i><\/b><\/p>\n

T\u1ef7 l\u1ec7 s\u1ed1ng l\u1edbn h\u01a1n 92% l\u00e0 \u0111\u1ea3m b\u1ea3o t\u1ef7 l\u1ec7 th\u00e0nh r\u1eebng (theo quy \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi c\u00e2y ng\u1eadp m\u1eb7n l\u00e0 70%).<\/p>\n

Chi\u1ec1u cao trung b\u00ecnh (t\u00ednh c\u1ea3 tr\u1ee5 m\u1ea7m v\u00e0 tr\u00ean tr\u1ee5 m\u1ea7m) t\u1eeb 35-40cm.<\/p>\n

\u0110\u01b0\u1eddng k\u00ednh tr\u00ean \u0111\u1ed1t 1 t\u1eeb 0,45-0,56 cm, s\u1ed1 l\u00e1 trung b\u00ecnh m\u1ed9t c\u00e2y 4- 6 l\u00e1.<\/p>\n

Sau 3 n\u0103m tr\u1ed3ng c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c 2,0-2,2cm, chi\u1ec1u cao l\u1edbn h\u01a1n 1,2m, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n 0,5-0,6m. T\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea3m b\u1ea3o tr\u00ean 70%.<\/p>\n

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

\u0110\u01b0\u1edbc v\u00f2i l\u00e0 c\u00e2y b\u1ee5i ho\u1eb7c l\u00e0 c\u00e2y g\u1ed7 nh\u1ecf, g\u1ed7 m\u1ec1m d\u00f9ng l\u00e0m c\u1ee7i ho\u1eb7c c\u1ecdc.<\/p>\n

\u0110\u01b0\u1edbc v\u00f2i ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u1ed3ng r\u1eebng ch\u1eafn s\u00f3ng, b\u1ea3o v\u1ec7 \u0111\u00ea \u0111\u1eadp, c\u1ed1 \u0111\u1ecbnh ph\u00f9 sa ng\u1eadp m\u1eb7n ven c\u1eeda s\u00f4ng, c\u1eeda bi\u1ec3n.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u0110\u01af\u01a0\u0301C VO\u0300I T\u00ean kh\u00e1c: \u0110\u00e2ng T\u00ean khoa h\u1ecdc:\u00a0\u00a0\u00a0\u00a0\u00a0 Rhizophora stylosa Griff H\u1ecd th\u1ef1c v\u1eadt: \u0110\u01b0\u1edbc (Rhizophoraceae) (Ngu\u1ed3n ch\u00ednh: Ng\u00f4 \u0110\u00ecnh Qu\u1ebf, 2010) 1. \u0110\u0103\u0323c \u0111i\u00ea\u0309m hi\u0300nh tha\u0301i \u0110\u01b0\u1edbc v\u00f2i l\u00e0 c\u00e2y th\u00e2n g\u1ed7 cao 2-8m. L\u00e1 \u0111\u01a1n h\u00ecnh b\u1ea7u d\u1ee5c h\u01a1i d\u00e0i, ch\u00f3p c\u00f3 m\u0169i nh\u1ecdn. L\u00e1 to, d\u1ea7y v\u00e0 b\u00f3ng d\u00e0i 10-12 cm, r\u1ed9ng […]<\/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\/12912"}],"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=12912"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/12912\/revisions"}],"predecessor-version":[{"id":12915,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/12912\/revisions\/12915"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=12912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=12912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=12912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}