{"id":8733,"date":"2009-03-24T04:19:31","date_gmt":"2009-03-23T21:19:31","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/ky-thuat-trong-keo-difficilis-tren-dat-cat-ven-bien\/"},"modified":"2019-09-24T11:04:43","modified_gmt":"2019-09-24T04:04:43","slug":"ky-thuat-trong-keo-difficilis-tren-dat-cat-ven-bien","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ky-thuat-trong-keo-difficilis-tren-dat-cat-ven-bien\/","title":{"rendered":"K\u1ef9 thu\u1eadt tr\u1ed3ng keo difficilis tr\u00ean \u0111\u1ea5t c\u00e1t ven bi\u1ec3n"},"content":{"rendered":"

K\u1ef9 thu\u1eadt tr\u1ed3ng keo difficilis tr\u00ean \u0111\u1ea5t c\u00e1t ven bi\u1ec3n<\/strong><\/p>\n

T\u00ean khoa h\u1ecdc: Acacia difficilis<\/em><\/p>\n

H\u1ecd th\u1ef1c v\u1eadt: \u0110\u1eadu (Leguminosae<\/em>)<\/p>\n

H\u1ecd ph\u1ee5: Trinh n\u1eef (Mimosaceae<\/em>)<\/p>\n

1. C\u00f4ng d\u1ee5ng<\/strong><\/p>\n

Tr\u1ed3ng r\u1eebng ph\u00f2ng h\u1ed9 ch\u1eafn gi\u00f3, c\u1ed1 \u0111\u1ecbnh c\u00e1t bay, c\u1ea3i thi\u1ec7n ti\u1ec3u kh\u00ed h\u1eadu c\u00e1c v\u00f9ng sa m\u1ea1c, v\u00f9ng c\u00e1t c\u00f3 kh\u00ed h\u1eadu kh\u1eafc nghi\u1ec7t, b\u1ecb uy hi\u1ebfp m\u1ea1nh b\u1edfi n\u1ea1n c\u00e1t bay. \u0110ai r\u1eebng r\u1ed9ng 100m, m\u1eadt \u0111\u1ed9 4050 c\u00e2y\/ha \u1edf tu\u1ed5i 3 l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 gi\u00f3 \u0110\u00f4ng B\u1eafc 0,81 l\u1ea7n so v\u1edbi t\u1ed1c \u0111\u1ed9 gi\u00f3 tr\u01b0\u1edbc \u0111ai 10m, h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c c\u00e1t bay g\u1ea5p 4,2 l\u1ea7n so v\u1edbi n\u01a1i tr\u1ed1ng, l\u00e0m t\u0103ng \u1ea9m \u0111\u1ed9 kh\u00f4ng kh\u00ed 3,7%, gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed 2,0oC<\/sup> so v\u1edbi n\u01a1i tr\u1ed1ng, tr\u1ea3 l\u1ea1i cho \u0111\u1ea5t 240 gam l\u00e1 r\u1ee5ng\/m2<\/sup> \u0111ai r\u1eebng.<\/p>\n

C\u0169ng c\u00f3 th\u1ec3 tr\u1ed3ng ph\u00e2n t\u00e1n quanh v\u01b0\u1eddn, quanh nh\u00e0, tr\u1ed3ng c\u00e2y c\u1ea3nh quan m\u00f4i tr\u01b0\u1eddng cho v\u00f9ng c\u00e1t. G\u1ed7 v\u00e0 c\u00e0nh l\u00e1 l\u00e0 ngu\u1ed3n ch\u1ea5t \u0111\u1ed1t r\u1ea5t qu\u00ed cho ng\u01b0\u1eddi d\u00e2n v\u00f9ng c\u00e1t ven bi\u1ec3n.<\/p>\n

2. \u0110\u1eb7c tr\u01b0ng h\u00ecnh th\u00e1i<\/strong><\/p>\n

C\u00e2y g\u1ed7 nh\u1ecf ho\u1eb7c c\u00e2y b\u1ee5i, cao t\u1eeb 2 \u0111\u1ebfn 12m, c\u00f3 tr\u1ee5 th\u00e2n th\u1eb3ng, t\u1eeb 1 g\u1ed1c c\u00e2y m\u1ecdc l\u00ean 2-4 th\u00e2n. V\u1ecf m\u00e0u n\u00e2u s\u1eabm, n\u1ee9t d\u1ecdc. C\u00e0nh nh\u1ecf, ph\u00e2n c\u00e0nh th\u1ea5p, m\u1ecdc ngang g\u1ea7n th\u00e0nh c\u00e1c v\u00f2ng c\u00e0nh tr\u00ean th\u00e2n, c\u00e0nh non c\u00f3 v\u1ecf m\u00e0u xanh.<\/p>\n

L\u00e1 bi\u1ebfn th\u00e1i qua 3 giai \u0111o\u1ea1n l\u00e1 m\u1ea7m, l\u00e1 th\u1eadt l\u00e0 l\u00e1 k\u00e9p l\u00f4ng chim v\u00e0 l\u00e1 gi\u1ea3 m\u1ecdc c\u00e1ch t\u1ed3n t\u1ea1i trong su\u1ed1t \u0111\u1eddi s\u1ed1ng c\u1ee7a c\u00e2y. L\u00e1 gi\u1ea3 h\u00ecnh l\u00ad\u01b0\u1ee1i li\u1ec1m ho\u1eb7c e l\u00edp h\u1eb9p, m\u00e0u xanh t\u00ad\u01a1i, m\u1ecdc c\u00e1ch, r\u1ed9ng 1,5-4,0cm, d\u00e0i 10-20cm, c\u00f3 3 g\u00e2n ch\u00ednh n\u1ed5i r\u00f5.<\/p>\n

C\u1ee5m hoa d\u00e0i 1,5-2cm, m\u00e0u v\u00e0ng, \u0111\u00e0i hoa 5 c\u00e1nh r\u00f5, d\u00e0i 0,6-0,8mm, c\u00f3 l\u00f4ng t\u01a1 m\u00e0u b\u1ea1c, tr\u00e0ng d\u00e0i 1,2-1,4mm c\u00f3 l\u00f4ng t\u01a1 ho\u1eb7c nh\u1eb5n khi gi\u00e0. Hoa m\u1ecdc \u1edf n\u00e1ch l\u00e1 ph\u00eda \u0111\u1ea7u c\u00e0nh. Hoa n\u1edf th\u00e1ng 11, qu\u1ea3 \u0111\u1eadu th\u1eb3ng ho\u1eb7c xo\u1eafn, ch\u00edn th\u00e1ng 5 n\u0103m sau. H\u1ea1t m\u00e0u n\u00e2u s\u00e1ng, h\u00ecnh b\u00e1n tr\u1ee5.<\/p>\n

M\u1ed9t kg h\u1ea1t c\u00f3 44000 h\u1ea1t. T\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m b\u00ecnh qu\u00e2n 82%.<\/p>\n

H\u00ecnh 1. A. difficilis tr\u1ed3ng tr\u00ean \u0111\u1ee5n c\u00e1t bi\u1ec3n<\/em><\/p>\n

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

M\u1ecdc t\u1ef1 nhi\u00ean \u1edf khu v\u1ef1c NW Lake Evella NT, Annie Cr NT, Moline NT (\u00fac), \u0111\u1ed9 cao 55-200m so v\u1edbi m\u1ef1c n\u01b0\u00ad\u1edbc bi\u1ec3n. Sinh tr\u00ad\u01b0\u1edfng t\u1ed1t tr\u00ean \u0111\u1ee5n, c\u1ed3n c\u00e1t tho\u00e1t n\u01b0\u1edbc.<\/p>\n

L\u00e0 c\u00e2y \u01b0a s\u00e1ng m\u1ea1nh,ch\u1ecbu m\u1eb7n k\u00e9m, c\u00e2y ng\u1eebng sinh tr\u00ad\u01b0\u1edfng \u1edf n\u1ed3ng \u0111\u1ed9 LD50 = 525 mol\/m3<\/sup> v\u00e0 chi\u1ec1u cao c\u00e2y t\u1ed1i \u0111a ch\u1ec9 \u0111\u1ea1t 11,5cm n\u00ean ch\u00fang kh\u00f4ng th\u00edch h\u1ee3p tr\u00ean c\u00e1c b\u00e3i c\u00e1t th\u1ea5p, b\u1ecb nhi\u1ec5m m\u1eb7n; ch\u1ecbu \u0111\u00ad\u01b0\u1ee3c c\u00e1t v\u00f9i n\u00ean th\u00edch h\u1ee3p tr\u1ed3ng r\u1eebng ph\u00f2ng h\u1ed9 tr\u00ean \u0111\u1ee5n, c\u1ed3n c\u00e1t bay.<\/p>\n

A. difficilis<\/em>\u0111\u01b0\u00ad\u1ee3c nh\u1eadp tr\u1ed3ng th\u1eed nghi\u1ec7m tr\u00ean \u0111\u1ea5t c\u00e1t ven bi\u1ec3n \u1edf Tuy Phong, B\u1eafc B\u00ecnh – B\u00ecnh Thu\u1eadn v\u00e0 Qu\u1ea3ng B\u00ecnh. C\u00e2y tr\u1ed3ng 56 th\u00e1ng tu\u1ed5i tr\u00ean \u0111\u1ea5t c\u00e1t \u0111\u1ea1t \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c 17,8cm, chi\u1ec1u cao 7,9m, \u0111\u00ad\u01b0\u1eddng k\u00ednh t\u00e1n 2,0m.<\/p>\n

4. \u0110i\u1ec1u ki\u1ec7n g\u00e2y tr\u1ed3ng<\/strong><\/p>\n

a.<\/em><\/strong>Kh\u00ed h\u1eadu: <\/em><\/strong>V\u00f9ng c\u00e1t ven bi\u1ec3n c\u00f3 \u1ea3nh h\u01b0\u00ad\u1edfng c\u1ee7a gi\u00f3 bi\u1ec3n. Nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n n\u0103m 23-27oC<\/sup>. L\u01b0\u1ee3ng m\u00ad\u01b0a trung b\u00ecnh n\u0103m tr\u00ean 700mm, th\u00edch h\u1ee3p nh\u1ea5t l\u00e0 1500mm. \u0110\u1ed9 \u1ea9m kh\u00f4ng kh\u00ed trung b\u00ecnh n\u0103m kh\u00f4ng d\u01b0\u00ad\u1edbi 80%.<\/p>\n

b. \u0110\u1ecba h\u00ecnh v\u00e0 th\u1ef1c b\u00ec: <\/em><\/strong>\u0110\u1ed9 cao d\u00ad\u1edbi 100m so v\u1edbi m\u1ef1c n\u00ad\u01b0\u1edbc bi\u1ec3n. \u0110\u1ed9 d\u1ed1c t\u1edbi 20o<\/sup>, th\u00edch h\u1ee3p d\u00ad\u01b0\u1edbi 10o<\/sup>. \u0110\u1ecba th\u1ebf d\u1ea1ng b\u00e3i c\u1ed3n \u0111\u1ebfn d\u1ea1ng \u0111\u1ee5n. Th\u1ef1c b\u00ec t\u1eeb \u0111\u1ea5t tr\u1ed1ng, \u0111\u1ebfn th\u1ea3m c\u1ecf th\u01b0\u00ada.<\/p>\n

c.<\/strong>\u0110\u1ea5t \u0111ai: <\/em><\/strong>Tr\u00ean \u0111\u1ea5t c\u00e1t ven bi\u1ec3n b\u1ecb di \u0111\u1ed9ng ho\u1eb7c b\u00e1n di \u0111\u1ed9ng do gi\u00f3, kh\u00f4ng b\u1ecb ng\u1eadp n\u00ad\u01b0\u1edbc m\u00f9a m\u01b0a.<\/p>\n

5. T\u1ea1o c\u00e2y con<\/strong><\/p>\n

– Ngu\u1ed3n gi\u1ed1ng:<\/em><\/strong>H\u1ea1t gi\u1ed1ng c\u00f3 th\u1ec3 nh\u1eadp t\u1eeb trung t\u00e2m gi\u1ed1ng c\u1ee7a \u00fac ho\u1eb7c thu h\u00e1i t\u1eeb nh\u1eefng l\u00e2m ph\u1ea7n r\u1eebng tr\u1ed3ng tr\u00ean v\u00f9ng c\u00e1t ven bi\u1ec3n n\u00ad\u01b0\u1edbc ta nh\u00ad\u01b0 \u1edf B\u00ecnh Thu\u1eadn v\u00e0 Qu\u1ea3ng B\u00ecnh. Ch\u1ecdn nh\u1eefng c\u00e2y 4 tu\u1ed5i tr\u1edf l\u00ean,h\u00ecnh th\u00e2n r\u00f5, nhi\u1ec1u c\u00e0nh nh\u00e1nh, t\u00e1n \u0111\u1ec1u, xum xu\u00ea; \u0111\u1ed9 v\u00ad\u01b0\u1ee3t sinh tr\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao v\u00e0 \u0111\u00ad\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n gi\u00e1 tr\u1ecb b\u00ecnh qu\u00e2n c\u1ee7a r\u1eebng ho\u1eb7c c\u00e2y xung quanh \u00edt nh\u1ea5t 30%; kh\u00f4ng c\u1ee5t ng\u1ecdn, s\u00e2u b\u1ec7nh, \u0111\u1ec3 l\u1ea5y h\u1ea1t gi\u1ed1ng \u00ad\u01b0\u01a1m c\u00e2y.<\/p>\n

– Thu h\u00e1i qu\u1ea3<\/em><\/strong>v\u00e0o th\u00e1ng 5 khi qu\u1ea3 tr\u00ean c\u00e2y ch\u00edn \u0111\u1ec1u, v\u1ecf c\u00f3 m\u00e0u n\u00e2u s\u00e1ng. H\u00e1i qu\u1ea3 v\u1ec1 tr\u1ea3i ra s\u00e2n ph\u01a1i trong b\u00f3ng r\u00e2m cho \u0111\u1ebfn kh\u00f4, \u0111\u1eadp cho v\u1ecf qu\u1ea3 g\u00e3y v\u00e0 s\u00e0ng b\u1ecf t\u1ea1p v\u1eadt. H\u1ea1t b\u1ea3o qu\u1ea3n th\u00f4ng th\u01b0\u1eddng trong t\u00fai nil\u00f4ng hay t\u00fai v\u1ea3i, c\u00f3 \u0111i\u1ec1u ki\u1ec7n th\u00ec c\u1ea5t tr\u1eef \u1edf nhi\u1ec7t \u0111\u1ed9 4-5oC<\/sup>.<\/p>\n

– X\u1eed l\u00fd h\u1ea1t<\/em><\/strong>b\u1eb1ng n\u00ad\u01b0\u1edbc s\u00f4i 100oC<\/sup> trong 30 gi\u00e2y, sau \u0111\u00f3 ng\u00e2m v\u00e0o n\u00ad\u01b0\u1edbc l\u1ea1nh trong 12 gi\u1edd, v\u1edbt ra r\u1eeda s\u1ea1ch h\u1ea1t r\u1ed3i \u0111em gieo l\u00ean hu\u1ed1ng. Khi c\u00e2y m\u1ea7m ra 3 l\u00e1 th\u00ec c\u1ea5y v\u00e0o b\u1ea7u. Ho\u1eb7c \u1ee7 h\u1ea1t 2-3 ng\u00e0y, r\u1eeda chua h\u00e0ng ng\u00e0y, ch\u1ecdn h\u1ea1t n\u1ee9t nanh \u0111em gieo v\u00e0o b\u1ea7u, m\u1ed7i b\u1ea7u 1 h\u1ea1t.<\/p>\n

– V\u1ecf b\u1ea7u<\/em><\/strong>b\u1eb1ng t\u00fai Poly\u00eatylen, d\u00e1n \u0111\u00e1y \u0111\u1ee5c l\u1ed7, c\u1ee1 9x12cm. Ru\u1ed9t b\u1ea7u g\u1ed3m \u0111\u1ea5t m\u1eb7t \u0111\u1ea5t c\u00e1t v\u01b0\u00ad\u1eddn \u01b0\u01a1m ho\u1eb7c tr\u1ed9n th\u00eam 10-20% \u0111\u1ea5t m\u1eb7t s\u00e9t pha, \u0111\u1eadp nh\u1ecf, s\u00e0ng k\u1ef9 lo\u1ea1i b\u1ecf t\u1ea1p v\u1eadt +10% ph\u00e2n chu\u1ed3ng hoai + 1% supe l\u00e2n (% t\u00ednh theo kh\u1ed1i l\u01b0\u1ee3ng ru\u1ed9t b\u1ea7u).<\/p>\n

– Ch\u0103m s\u00f3c: <\/em><\/strong>T\u00ad\u01b0\u1edbi \u0111\u1eabm b\u1ea7u tr\u01b0\u00ad\u1edbc khi gieo h\u1ea1t ho\u1eb7c c\u1ea5y c\u00e2y. C\u1eafm r\u00e0ng ho\u1eb7c l\u00e0m d\u00e0n che 50% \u00e1nh s\u00e1ng. Sau khi c\u1ea5y t\u01b0\u00ad\u1edbi n\u00ad\u01b0\u1edbc th\u00ad\u01b0\u1eddng xuy\u00ean \u0111\u1ee7 \u1ea9m cho c\u00e2y, d\u1eb7m c\u00e2y b\u1ecb ch\u1ebft. D\u1ee1 b\u1ecf gi\u00e0n che sau khi c\u00e2y c\u1ea5y \u0111\u00e3 \u1ed5n \u0111\u1ecbnh,c\u1ee9 15-20 ng\u00e0y nh\u1ed5 c\u1ecf ph\u00e1 v\u00e1ng 1 l\u1ea7n v\u00e0 t\u00ad\u01b0\u1edbi th\u00fac \u0111\u1ea1m ur\u00ea n\u1ed3ng \u0111\u1ed9 0,1%, li\u1ec1u l\u00ad\u01b0\u1ee3ng 4 l\u00edt\/m2<\/sup>.<\/p>\n

– Ti\u00eau chu\u1ea9n c\u00e2y con \u0111em tr\u1ed3ng:<\/em><\/strong>C\u00e2y \u01b0\u01a1m 6 th\u00e1ng tu\u1ed5i c\u00f3 chi\u1ec1u cao 0,7-0,8m, \u0111\u01b0\u1eddng k\u00ednh c\u1ed5 r\u1ec5 0,3-0,4cm, sinh tr\u01b0\u1edfng t\u1ed1t, kh\u00f4ng b\u1ecb s\u00e2u b\u1ec7nh h\u1ea1i, c\u1ee5t ng\u1ecdn.<\/p>\n

6. B\u1ed1 tr\u00ed h\u1ec7 th\u1ed1ng \u0111ai v\u00e0 k\u1ebft c\u1ea5u \u0111ai r\u1eebng<\/strong><\/p>\n

H\u1ec7 th\u1ed1ng \u0111ai r\u1eebng ph\u00f2ng h\u1ed9 tr\u00ean c\u00e1t di \u0111\u1ed9ng \u0111\u00ad\u01b0\u1ee3c b\u1ed1 tr\u00ed t\u1eeb ch\u00e2n ti\u1ebfn d\u1ea7n l\u00ean \u0111\u1ec9nh \u0111\u1ee5n c\u00e1t. \u0110ai ch\u00ednh vu\u00f4ng g\u00f3c ho\u1eb7c g\u1ea7n vu\u00f4ng g\u00f3c v\u1edbi h\u00ad\u01b0\u1edbng gi\u00f3 h\u1ea1i ch\u00ednh, song song v\u1edbi \u0111\u00ad\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c. \u0110ai ph\u1ee5 vu\u00f4ng g\u00f3c v\u1edbi \u0111ai ch\u00ednh.<\/p>\n

Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111ai l\u00e0 100-200m. B\u1ec1 r\u1ed9ng \u0111ai r\u1eebng tr\u00ean \u0111\u1ee5n, c\u1ed3n c\u00e1t bay t\u1ed1i thi\u1ec3u 100m; \u1edf c\u1ed3n, b\u00e3i c\u00e1t c\u1ed1 \u0111\u1ecbnh t\u1ed1i thi\u1ec3u 20m; tr\u00ean l\u00edp trong khu v\u1ef1c canh t\u00e1c n\u00f4ng nghi\u1ec7p t\u1ed1i thi\u1ec3u 2-3 h\u00e0ng c\u00e2y.<\/p>\n

\u00e1p d\u1ee5ng ki\u1ec3u \u0111ai c\u00f3 k\u1ebft c\u1ea5u tr\u1ed3ng xen theo b\u0103ng c\u1ee7a 1-3 lo\u00e0i c\u00e2y v\u1edbi t\u1ea7ng c\u00e2y cao tr\u1ed3ng phi lao, keo Acacia difficilis,<\/em> keo Acacia torulosa <\/em>ch\u1eafn gi\u00f3, t\u1ea7ng d\u01b0\u1edbi tr\u1ed3ng d\u1ee9a d\u1ea1i, x\u01b0\u00ad\u01a1ng r\u1ed3ng ch\u1eafn c\u00e1t.<\/p>\n

7. K\u1ef9 thu\u1eadt tr\u1ed3ng<\/strong><\/p>\n

–<\/strong>V\u00f9ng ven bi\u1ec3n ph\u00eda B\u1eafc tr\u1ed3ng v\u1ee5 xu\u00e2n h\u00e8 v\u00e0 c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng v\u1ee5 thu, v\u00f9ng c\u00f3 gi\u00f3 L\u00e0o tr\u1ed3ng v\u1ee5 thu \u0111\u00f4ng, v\u00f9ng kh\u00f4 h\u1ea1n c\u1ef1c Nam Trung b\u1ed9 tr\u1ed3ng v\u1ee5 \u0111\u00f4ng, v\u00f9ng c\u00f2n l\u1ea1i tr\u1ed3ng \u0111\u1ea7u m\u00f9a m\u01b0\u00ada. Tranh th\u1ee7 tr\u1ed3ng v\u00e0o ng\u00e0y c\u00f3 m\u01b0\u00ada, tr\u00e1nh tr\u1ed3ng r\u1eebng v\u00e0o ng\u00e0y c\u00f3 gi\u00f3 heo may.<\/p>\n

– M\u1eadt \u0111\u1ed9 tr\u1ed3ng 5000 c\u00e2y\/ha, c\u1ef1 ly 1x2m tr\u00ean \u0111\u1ee5n, c\u1ed3n c\u00e1t bay v\u00e0 c\u00f3 th\u1ec3 gi\u1ea3m xu\u1ed1ng 3300 c\u00e2y\/ha, c\u1ef1 ly 1,5x2m n\u01a1i c\u1ed3n, b\u00e3i c\u00e1t c\u1ed1 \u0111\u1ecbnh.<\/p>\n

–<\/strong>\u0110\u00e0o h\u1ed1 r\u1ed9ng 40x40cm, s\u00e2u 40-60cm ngay khi tr\u1ed3ng.<\/p>\n

– \u0110\u1ed9n 1kg l\u00e1 c\u1ecf r\u00e1c ho\u1eb7c rong r\u00eau v\u00e0 b\u00f3n 1kg ph\u00e2n chu\u1ed3ng hoai v\u00e0 100g ph\u00e2n NPK S\u00f4ng Gianh v\u1edbi th\u00e0nh ph\u1ea7n ch\u1ea5t \u0111\u1ed9n 75%, N 10%, P2<\/sub>O5<\/sub> 10%, K2<\/sub>O 5% cho 1 c\u00e2y, tr\u1ed9n \u0111\u1ec1u ph\u00e2n v\u1edbi \u0111\u1ea5t \u1edf \u0111\u1ed9 s\u00e2u 30cm r\u1ed3i l\u1ea5p \u0111\u1ea5t \u0111\u1ea7y h\u1ed1.<\/p>\n

– Moi 1 l\u1ed7 s\u00e2u 20cm \u1edf gi\u1eefa h\u1ed1, \u0111\u1eb7t c\u00e2y cho r\u1ec5 v\u00e0 th\u00e2n \u0111\u1ee9ng th\u1eb3ng, l\u1ea5p k\u00edn \u0111\u1ea5t, d\u1eadm ch\u1eb7t r\u1ed3i vun \u0111\u1ea5t cao h\u01a1n m\u1eb7t \u0111\u1ea5t 3-5cm.<\/p>\n

– Tr\u1ed3ng d\u1eb7m sau khi tr\u1ed3ng 1 th\u00e1ng. Ch\u0103m s\u00f3c 3 n\u0103m li\u1ec1n: N\u0103m \u0111\u1ea7u ch\u0103m s\u00f3c 1 l\u1ea7n sau khi tr\u1ed3ng 1-2 th\u00e1ng. N\u0103m th\u1ee9 2 v\u00e0 3 ch\u0103m s\u00f3c 2 l\u1ea7n m\u1ed7i n\u0103m v\u00e0o cu\u1ed1i m\u00f9a m\u01b0\u00ada v\u00e0 \u0111\u1ea7u m\u00f9a kh\u00f4. C\u00e1ch ch\u0103m s\u00f3c l\u00e0 vun x\u1edbi \u0111\u1ea5t quanh g\u1ed1c r\u1ed9ng 1m, cao 5-10cm, t\u1eadn d\u1ee5ng c\u1ecf r\u00e1c t\u1ee7 k\u00edn quanh g\u1ed1c c\u00e2y. B\u00f3n th\u00fac 100g ph\u00e2n NPK S\u00f4ng Gianh v\u00e0o l\u1ea7n ch\u0103m s\u00f3c th\u1ee9 nh\u1ea5t c\u1ee7a n\u0103m th\u1ee9 2 v\u00e0 n\u0103m th\u1ee9 3.<\/p>\n

H\u00ecnh 2: R\u1eebng tr\u1ed3ng A. difficilis 3 tu\u1ed5i tr\u00ean \u0111\u1ee5n c\u00e1t bay \u1edf Qu\u1ea3ng B\u00ecnh<\/em><\/p>\n

8. Nu\u00f4i d\u00ad\u01b0\u1ee1ng, b\u1ea3o v\u1ec7 r\u1eebng<\/strong><\/p>\n

R\u1eebng ph\u00f2ng h\u1ed9 ch\u1eafn gi\u00f3, c\u1ed1 \u0111\u1ecbnh c\u00e1t kh\u00f4ng t\u1ec9a th\u01b0\u00ada, ch\u1ec9 ch\u1eb7t ph\u1ea7n c\u00e2y b\u1ecb kh\u00f4 t\u1eadn d\u1ee5ng l\u00e0m c\u1ee7i.<\/p>\n

Kh\u00f4ng ch\u0103n th\u1ea3 tr\u00e2u b\u00f2 v\u00e0o r\u1eebng t\u1eeb sau khi tr\u1ed3ng \u0111\u1ebfn khi c\u00e2y cao h\u01a1n 3-4m. C\u1ea5m v\u01a1 qu\u00e9t l\u00e1, ch\u1eb7t ph\u00e1 c\u00e2y c\u00e0nh, ch\u1ec9 \u0111\u00ad\u01b0\u1ee3c t\u1eadn d\u1ee5ng c\u00e0nh kh\u00f4 l\u00e0m c\u1ee7i. Theo d\u00f5i, ph\u00f2ng ch\u1ed1ng l\u1eeda v\u00e0 s\u00e2u b\u1ec7nh h\u1ea1i r\u1eebng,…<\/p>\n

\u0110\u1eb7ng V\u0103n Thuy\u1ebft, Tri\u1ec7u Th\u00e1i H\u01b0ng<\/em><\/strong><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

K\u1ef9 thu\u1eadt tr\u1ed3ng keo difficilis trên \u0111\u1ea5t cát ven bi\u1ec3n Tên khoa h\u1ecdc: Acacia difficilis H\u1ecd th\u1ef1c v\u1eadt: \u0110\u1eadu (Leguminosae) H\u1ecd ph\u1ee5: Trinh n\u1eef (Mimosaceae) 1. Công d\u1ee5ng Tr\u1ed3ng r\u1eebng phòng h\u1ed9 ch\u1eafn gió, c\u1ed1 \u0111\u1ecbnh cát bay, c\u1ea3i thi\u1ec7n ti\u1ec3u khí h\u1eadu các vùng sa m\u1ea1c, vùng cát có khí h\u1eadu kh\u1eafc nghi\u1ec7t, b\u1ecb uy hi\u1ebfp m\u1ea1nh b\u1edfi n\u1ea1n cát bay. \u0110ai r\u1eebng r\u1ed9ng 100m, m\u1eadt \u0111\u1ed9 4050 cây\/ha \u1edf tu\u1ed5i 3 làm gi\u1ea3m t\u1ed1c \u0111\u1ed9 gió \u0110ông B\u1eafc 0,81 l\u1ea7n so v\u1edbi t\u1ed1c \u0111\u1ed9 gió tr\u01b0\u1edbc \u0111ai 10m, h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c cát bay g\u1ea5p 4,2 l\u1ea7n so v\u1edbi n\u01a1i tr\u1ed1ng, làm t\u0103ng \u1ea9m \u0111\u1ed9 không khí 3,7%, gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 không khí 2,0oC so v\u1edbi n\u01a1i tr\u1ed1ng, tr\u1ea3 l\u1ea1i cho \u0111\u1ea5t 240 gam lá r\u1ee5ng\/m2 \u0111ai r\u1eebng. C\u0169ng có th\u1ec3 tr\u1ed3ng phân tán quanh v\u01b0\u1eddn, quanh nhà, tr\u1ed3ng cây c\u1ea3nh quan môi tr\u01b0\u1eddng cho vùng cát. G\u1ed7 và cành lá là ngu\u1ed3n ch\u1ea5t \u0111\u1ed1t r\u1ea5t quí cho ng\u01b0\u1eddi dân vùng cát ven bi\u1ec3n. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8733"}],"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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=8733"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8733\/revisions"}],"predecessor-version":[{"id":19098,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8733\/revisions\/19098"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}