{"id":8545,"date":"2009-03-24T02:06:37","date_gmt":"2009-03-23T19:06:37","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/ket-qua-nghien-cuu-buoc-dau-ve-kha-nang-phuc-hoi-rung-tu-nhien-la-rong-thuong-xanh-sau-nuong-ray-o-tay-nguyen\/"},"modified":"2019-09-25T10:31:37","modified_gmt":"2019-09-25T03:31:37","slug":"ket-qua-nghien-cuu-buoc-dau-ve-kha-nang-phuc-hoi-rung-tu-nhien-la-rong-thuong-xanh-sau-nuong-ray-o-tay-nguyen","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-nghien-cuu-buoc-dau-ve-kha-nang-phuc-hoi-rung-tu-nhien-la-rong-thuong-xanh-sau-nuong-ray-o-tay-nguyen\/","title":{"rendered":"K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u v\u1ec1 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh sau n\u01b0\u01a1ng r\u1eaby \u1edf T\u00e2y nguy\u00ean"},"content":{"rendered":"

V\u00f5 \u0110\u1ea1i H\u1ea3i – Tr\u1ea7n V\u0103n Con<\/strong> v\u00e0 c\u00e1c c\u1ed9ng t\u00e1c<\/p>\n

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

T\u00e2y Nguy\u00ean bao g\u1ed3m 4 t\u1ec9nh: Kon Tum, Gia Lai, \u0110\u1eafc L\u1eafc v\u00e0 L\u00e2m \u0110\u1ed3ng v\u1edbi t\u1ed5ng di\u1ec7n t\u00edch 57.373 km2<\/sup> v\u00e0 d\u00e2n s\u1ed1 4.058.512 ng\u01b0\u1eddi (s\u1ed1 li\u1ec7u n\u0103m 1999). \u0110\u00e2y l\u00e0 v\u00f9ng \u0111\u1ea5t c\u00f3 v\u1ecb tr\u00ed chi\u1ebfn l\u01b0\u1ee3c h\u1ebft s\u1ee9c quan tr\u1ecdng v\u1ec1 kinh t\u1ebf, ch\u00ednh tr\u1ecb v\u00e0 an ninh qu\u1ed1c ph\u00f2ng \u0111\u1ed1i v\u1edbi c\u1ea3 n\u01b0\u1edbc. T\u00e2y Nguy\u00ean c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean thu\u1eadn l\u1ee3i v\u1edbi kh\u00ed h\u1eadu nhi\u1ec7t \u0111\u1edbi n\u1eafng \u1ea5m, m\u01b0a nhi\u1ec1u; di\u1ec7n t\u00edch che ph\u1ee7 c\u1ee7a r\u1eebng c\u00f2n r\u1ea5t l\u1edbn v\u1edbi ngu\u1ed3n t\u00e0i nguy\u00ean sinh h\u1ecdc phong ph\u00fa. \u0110\u1ea5t \u0111ai T\u00e2y Nguy\u00ean r\u1ea5t phong ph\u00fa v\u00e0 c\u00f2n t\u01b0\u01a1ng \u0111\u1ed1i m\u00e0u m\u1ee1, \u0111\u1eb7c bi\u1ec7t l\u00e0 qu\u0129 \u0111\u1ea5t Bazan th\u1ec3 hi\u1ec7n ti\u1ec1m n\u0103ng r\u1ea5t l\u1edbn cho ph\u00e1t tri\u1ec3n n\u00f4ng l\u00e2m nghi\u1ec7p. Tuy nhi\u00ean, nh\u1eefng th\u1ebf m\u1ea1nh v\u00e0 ti\u1ec1m n\u0103ng to l\u1edbn c\u1ee7a T\u00e2y Nguy\u00ean ch\u01b0a \u0111\u01b0\u1ee3c khai th\u00e1c v\u00e0 s\u1eed d\u1ee5ng \u0111\u00fang m\u1ee9c, r\u1eebng v\u1eabn ti\u1ebfp t\u1ee5c b\u1ecb ch\u1eb7t ph\u00e1 v\u00e0 di\u1ec7n t\u00edch ng\u00e0y c\u00e0ng gi\u1ea3m s\u00fat. M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n l\u00e0 t\u00ecnh tr\u1ea1ng ph\u00e1 r\u1eebng l\u00e0m n\u01b0\u01a1ng r\u1eaby c\u1ee7a m\u1ed9t b\u1ed9 ph\u1eadn r\u1ea5t l\u1edbn \u0111\u1ed3ng b\u00e0o c\u00e1c d\u00e2n t\u1ed9c b\u1ea3n \u0111\u1ecba T\u00e2y Nguy\u00ean c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o cu\u1ed9c s\u1ed1ng du canh du c\u01b0.<\/p>\n

Qu\u00e1 tr\u00ecnh ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 th\u1ef1c hi\u1ec7n n\u00f4ng nghi\u1ec7p du canh quay v\u00f2ng. Trong d\u1ef1 \u00e1n tr\u1ed3ng m\u1edbi 5 tri\u1ec7u ha r\u1eebng giai \u0111o\u1ea1n 1998-2010, b\u00ean c\u1ea1nh vi\u1ec7c \u0111\u1ea9y m\u1ea1nh c\u00f4ng t\u00e1c tr\u1ed3ng r\u1eebng, v\u1ea5n \u0111\u1ec1 ph\u1ee5c h\u1ed3i r\u1eebng t\u1ef1 nhi\u00ean c\u0169ng r\u1ea5t \u0111\u01b0\u1ee3c quan t\u00e2m ch\u00fa \u00fd. Tuy nhi\u00ean, nghi\u00ean c\u1ee9u v\u1ec1 v\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f2n r\u1ea5t \u00edt \u1ecfi v\u00ec \u0111\u00e2y l\u00e0 c\u1ea3 m\u1ed9t qu\u00e1 tr\u00ecnh di\u1ec5n th\u1ebf l\u00e2u d\u00e0i, ph\u1ee9c t\u1ea1p. Nh\u1eb1m g\u00f3p ph\u1ea7n x\u00e2y d\u1ef1ng c\u00e1c c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby, trong khu\u00f4n kh\u1ed5 d\u1ef1 \u00e1n nghi\u00ean c\u1ee9u: “Nghi\u00ean c\u1ee9u v\u00e0 \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt \u0111\u1ec3 thi\u1ebft l\u1eadp v\u00e0 qu\u1ea3n l\u00fd r\u1eebng ph\u00f2ng h\u1ed9 \u0111\u1ea7u ngu\u1ed3n \u1edf T\u00e2y Nguy\u00ean, Vi\u1ec7t Nam<\/em>” do t\u1ed5 ch\u1ee9c khoa h\u1ecdc qu\u1ed1c t\u1ebf c\u1ee7a Thu\u1ef5 \u0110i\u1ec3n t\u00e0i tr\u1ee3 ch\u00fang t\u00f4i \u0111\u00e3 ti\u1ebfn h\u00e0nh \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh. Chuy\u00ean \u0111\u1ec1 n\u00e0y do Ti\u1ebfn s\u1ef9 Tr\u1ea7n V\u0103n Con v\u00e0 c\u00e1c c\u1ed9ng t\u00e1c vi\u00ean c\u1ee7a Trung t\u00e2m L\u00e2m nghi\u1ec7p nhi\u1ec7t \u0111\u1edbi thu\u1ed9c Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Namth\u1ef1c hi\u1ec7n.<\/p>\n

\u0110\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u thu\u1ed9c \u0111\u1ecba b\u00e0n x\u00e3 S\u01a1 Pay, huy\u1ec7n K’Bang, t\u1ec9nh Gia Lai c\u00f3 \u0111\u1ed9 cao ph\u1ed5 bi\u1ebfn tr\u00ean 1000m v\u1edbi c\u00e1c \u0111\u1eb7c tr\u01b0ng ch\u00ednh sau \u0111\u00e2y:<\/p>\n

V\u1ec1 ch\u1ebf \u0111\u1ed9 nhi\u1ec7t: \u0110i\u1ec1u ki\u1ec7n nhi\u1ec7t h\u1ea1n ch\u1ebf (t\u1ed5ng t\u00edch \u00f4n d\u01b0\u1edbi 8000oC<\/sup>). N\u1ec1n nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh th\u00e1ng l\u1ea1nh nh\u1ea5t (th\u00e1ng 1) d\u01b0\u1edbi 16oC<\/sup>, nhi\u1ec7t \u0111\u1ed9 th\u1ea5p nh\u1ea5t tuy\u1ec7t \u0111\u1ed1i c\u00f3 kh\u1ea3 n\u0103ng d\u01b0\u1edbi 5oC<\/sup>, nhi\u1ec7t \u0111\u1ed9 cao nh\u1ea5t tuy\u1ec7t \u0111\u1ed1i ph\u1ed5 bi\u1ebfn tr\u00ean d\u01b0\u1edbi 30 oC<\/sup> .<\/p>\n

Ch\u1ebf \u0111\u1ed9 \u1ea9m: Nh\u00ecn chung l\u01b0\u1ee3ng m\u01b0a b\u00ecnh qu\u00e2n h\u00e0ng n\u0103m tr\u00ean 2.400 mm (ba th\u00e1ng m\u01b0a nhi\u1ec1u nh\u1ea5t l\u00e0 th\u00e1ng 9, 10 v\u00e0 11). M\u00f9a h\u1ea1 th\u1eeba \u1ea9m, m\u00f9a \u0111\u00f4ng \u0111\u1ee7 \u1ea9m thu\u1ed9c ki\u1ec3u kh\u00ed h\u1eadu n\u00fai cao. \u0110\u1ed9 \u1ea9m b\u00ecnh qu\u00e2n h\u00e0ng n\u0103m tr\u00ean 90%, ph\u00eda Namhuy\u1ec7n d\u01b0\u1edbi 90%.<\/p>\n

M\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 h\u1ebft s\u1ee9c quan tr\u1ecdng \u0111\u1ec3 th\u1ef1c v\u1eadt sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n l\u00e0 ch\u1ebf \u0111\u1ed9 nhi\u1ec7t \u1ea9m, \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n qua m\u1ed9t s\u1ed1 ch\u1ec9 ti\u00eau ph\u1ea3n \u00e1nh s\u1ef1 \u0111\u1ea3m b\u1ea3o n\u01b0\u1edbc cho th\u1ef1c v\u1eadt. C\u00e1c ch\u1ec9 ti\u00eau n\u00e0y ph\u1ea3n \u00e1nh ch\u1ebf \u0111\u1ed9 nhi\u1ec7t \u1ea9m c\u1ee7a v\u00f9ng K\u2019Bang l\u00e0 v\u00f9ng kh\u00ed h\u1eadu c\u1ee7a th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng m\u01b0a nhi\u1ec7t \u0111\u1edbi l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh.<\/p>\n

\u0110\u00e2y l\u00e0 v\u00f9ng \u0111\u1ea5t \u0111ai c\u00f2n kh\u00e1 m\u1ea7u m\u1ee1, c\u00e1c ki\u1ec3u canh t\u00e1c tr\u00ean r\u1eaby du canh c\u1ee7a ng\u01b0\u1eddi d\u00e2n t\u1ed9c Bahna ch\u1ee7 y\u1ebfu g\u1ed3m c\u00e1c lo\u00e0i c\u00e2y sau: l\u00faa c\u1ea1n, ng\u00f4, s\u1eafn, \u0111\u1eadu xanh, \u0111\u1eadu cu ve,…; \u0111\u1ed9 d\u1ed1c c\u00e1c r\u1eaby trong v\u00f9ng thu\u1ed9c di\u1ec7n th\u1ea5p, trung b\u00ecnh <200<\/sup>. H\u00ecnh th\u1ee9c canh t\u00e1c c\u1ee7a ng\u01b0\u1eddi Bahna th\u01b0\u1eddng l\u00e0 lu\u00e2n canh, m\u1ed7i r\u1eaby m\u1edbi \u0111\u01b0\u1ee3c ph\u00e1t c\u00f3 th\u1ec3 canh t\u00e1c t\u1eeb 2-4 v\u1ee5 (ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 ph\u00ec, n\u0103ng su\u1ea5t r\u1eaby, t\u00ecnh h\u00ecnh c\u1ecf d\u1ea1i), sau \u0111\u00f3 \u0111\u01b0\u1ee3c b\u1ecf ho\u00e1 v\u00e0 quay l\u1ea1i canh t\u00e1c sau kho\u1ea3ng 15 n\u0103m. Ng\u00e0y nay do nhi\u1ec1u s\u1ee9c \u00e9p n\u00ean th\u1eddi gian b\u1ecf ho\u00e1 \u0111\u00e3 r\u00fat ng\u1eafn xu\u1ed1ng c\u00f2n 7 n\u0103m.<\/p>\n

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

1.1. Ph\u01b0\u01a1ng ph\u00e1p l\u1eadp \u00f4 ti\u00eau chu\u1ea9n v\u00e0 thu th\u1eadp s\u1ed1 li\u1ec7u<\/em><\/p>\n

Do \u0111i\u1ec1u ki\u1ec7n v\u1ec1 th\u1eddi gian nghi\u00ean c\u1ee9u, \u0111\u1ec1 t\u00e0i \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p b\u1ed1 tr\u00ed h\u1ec7 th\u1ed1ng c\u00e1c \u00f4 ti\u00eau chu\u1ea9n t\u1ea1m th\u1eddi v\u1edbi quan \u0111i\u1ec3m “l\u1ea5y kh\u00f4ng gian thay th\u1ebf th\u1eddi gian”. Ch\u1ec9 ti\u00eau \u0111\u1ec3 ch\u1ecdn \u00f4 \u0111i\u1ec1u tra: (i) Tu\u1ed5i c\u1ee7a r\u1eebng ph\u1ee5c h\u1ed3i (t\u1eeb khi b\u1ecf h\u00f3a); (ii) L\u1ecbch s\u1eed canh t\u00e1c tr\u01b0\u1edbc \u0111\u00f3; v\u00e0 (iii) \u0110i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba. Di\u1ec7n t\u00edch \u00f4 ti\u00eau chu\u1ea9n l\u00e0 900m2<\/sup> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf th\u00e0nh 3 ph\u1ea7n (xem h\u00ecnh v\u1ebd).<\/p>\n

-Ph\u1ea7n A l\u00e0 h\u00ecnh vu\u00f4ng l\u1edbn (30x30m) \u0111\u1ec3 \u0111i\u1ec1u tra t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c >5 cm v\u00e0 c\u00f3 chi\u1ec1u cao >1,3 m, ghi l\u1ea1i c\u00e1c th\u00f4ng s\u1ed1 sau: Lo\u00e0i, chi\u1ec1u cao v\u00fat ng\u1ecdn, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n, s\u1ee9c s\u1ed1ng,…<\/p>\n

-Ph\u1ea7n B: H\u00ecnh ch\u1eef nh\u1eadt (5×30 m) th\u1ed1ng k\u00ea ghi l\u1ea1i t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c <5 cm v\u00e0 chi\u1ec1u cao >1,3 m, ghi l\u1ea1i c\u00e1c th\u00f4ng s\u1ed1: lo\u00e0i, chi\u1ec1u cao v\u00fat ng\u1ecdn, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c, \u0111\u1ed9 che ph\u1ee7, s\u1ee9c s\u1ed1ng,…<\/p>\n

-Ph\u1ea7n C: 13 \u00f4 vu\u00f4ng d\u1ea1ng b\u1ea3n (2x2m) \u0111\u1ec3 \u0111\u1ebfm c\u00e1c c\u00e2y t\u00e1i sinh c\u00f3 chi\u1ec1u cao nh\u1ecf h\u01a1n 1,3 m, \u0111\u1ed9 che ph\u1ee7.<\/p>\n

C\u00e1c \u00f4 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c ch\u1ecdn theo chu\u1ed7i th\u1eddi gian sau b\u1ecf h\u00f3a t\u1eeb 1 cho \u0111\u1ebfn tr\u00ean 10 n\u0103m v\u00e0 \u0111\u01b0\u1ee3c chia th\u00e0nh 3 c\u1ea5p b\u1ecf ho\u00e1: C\u1ea5p 1: t\u1eeb 1-3 n\u0103m; C\u1ea5p 2: t\u1eeb 4-7 n\u0103m; C\u1ea5p 3: >7 n\u0103m. Th\u00f4ng tin v\u1ec1 th\u1eddi gian b\u1ecf h\u00f3a v\u00e0 l\u1ecbch s\u1eed s\u1eed d\u1ee5ng \u0111\u1ea5t c\u1ee7a r\u1eebng ph\u1ee5c h\u1ed3i \u0111\u01b0\u1ee3c thu th\u1eadp th\u00f4ng qua ph\u1ecfng v\u1ea5n d\u00e2n s\u1edf t\u1ea1i (th\u01b0\u1eddng l\u00e0 c\u00e1c ch\u1ee7 r\u1eaby b\u1ecf h\u00f3a).<\/p>\n

1.2. Ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch c\u00e1c th\u00f4ng s\u1ed1 c\u1ea5u tr\u00fac<\/em><\/p>\n

C\u00e1c th\u00f4ng tin thu th\u1eadp \u0111\u01b0\u1ee3c qua c\u00e1c \u00f4 \u0111i\u1ec1u tra \u1edf 3 ph\u1ea7n c\u1ee7a \u00f4 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c n\u1ed9i dung sau: \u0110\u1ed9 che ph\u1ee7 c\u1ee7a th\u1ea3m th\u1ef1c v\u1eadt (t\u00ednh c\u1ea3 c\u00e2y th\u00e2n th\u1ea3o), m\u1eadt \u0111\u1ed9, t\u1ed5 th\u00e0nh lo\u00e0i c\u00e2y, \u0111\u1ed9ng th\u00e1i thay \u0111\u1ed5i t\u1ed5 th\u00e0nh c\u00e2y theo th\u1eddi gian, s\u1ef1 thay \u0111\u1ed5i v\u1ec1 \u0111\u1ed9 ph\u00ec c\u1ee7a \u0111\u1ea5t (th\u00f4ng qua th\u1ea3m th\u1ef1c v\u1eadt ph\u1ee5c h\u1ed3i), c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng H, D,…<\/p>\n

C\u1ea5u tr\u00fac t\u1ed5 th\u00e0nh lo\u00e0i l\u00e0 th\u00e0nh ph\u1ea7n c\u00e1 th\u1ec3 c\u1ee7a c\u00e1c lo\u00e0i tham gia t\u1ea1o n\u00ean qu\u1ea7n x\u00e3 th\u1ef1c v\u1eadt c\u0169ng nh\u01b0 vai tr\u00f2 v\u00e0 quan h\u1ec7 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c lo\u00e0i \u0111\u00f3. C\u00e1c ch\u1ec9 ti\u00eau \u0111\u1ec3 ph\u00e2n t\u00edch c\u00e1c th\u00f4ng s\u1ed1 c\u1ea5u tr\u00fac g\u1ed3m:<\/p>\n

T\u1ed5ng s\u1ed1 c\u00e2y c\u1ee7a m\u1ed7i lo\u00e0i trong \u00f4 \u0111i\u1ec1u tra (\u0111\u1ed9 nhi\u1ec1u t\u01b0\u01a1ng \u0111\u1ed1i).<\/p>\n

T\u1ed5ng ti\u1ebft di\u1ec7n tr\u00f2n c\u1ee7a t\u1eebng lo\u00e0i (\u01b0u th\u1ebf t\u01b0\u01a1ng \u0111\u1ed1i), th\u1ec3 hi\u1ec7n gi\u00e1 tr\u1ecb vai tr\u00f2 c\u1ee7a m\u1ed7i lo\u00e0i trong qu\u1ea7n x\u00e3.<\/p>\n

T\u1ef7 l\u1ec7 h\u1ed7n lo\u00e0i = s\u1ed1 lo\u00e0i chia cho t\u1ed5ng s\u1ed1 c\u00e2y: \u0110\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c pha di\u1ec5n th\u1ebf (\u0111\u1ed9ng th\u00e1i t\u1ed5 th\u00e0nh) theo t\u1ef7 s\u1ed1 h\u1ed7n lo\u00e0i, ch\u00fang t\u00f4i ph\u00e2n bi\u1ec7t hai lo\u1ea1i t\u1ef7 s\u1ed1 h\u1ed7n lo\u00e0i nh\u01b0 sau: (i) HL1 = S\u1ed1 lo\u00e0i\/t\u1ed5ng s\u1ed1 c\u00e2y; (ii) HL2 = s\u1ed1 lo\u00e0i c\u00f3 \u0111\u1ed9 nhi\u1ec1u t\u01b0\u01a1ng \u0111\u1ed1i >5%\/ t\u1ed5ng s\u1ed1 c\u00e2y.<\/p>\n

\u0110\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 ph\u1ee5c h\u1ed3i r\u1eebng, d\u00f9ng \u0111\u1ed9 t\u00e0n che c\u1ee7a nh\u1eefng c\u00e2y g\u1ed7 c\u00f3 H>1,3 m v\u00e0 D1,3<\/sub>>5 cm, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1c c\u00e2y c\u00f3 chi\u1ec1u cao t\u1eeb 3-5 m tr\u1edf l\u00ean (Tr\u1ea7n \u0110\u00ecnh L\u00fd, 1996), k\u00fd hi\u1ec7u l\u00e0 K: N\u1ebfu K< 0,3 ch\u01b0a c\u00f3 r\u1eebng; K= 0,3-0,6 r\u1eebng th\u01b0a; K> 0,6 r\u1eebng k\u00edn.<\/p>\n

II. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u:<\/p>\n

2<\/em>.<\/em>1. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra, \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby \u1edf Kon H\u00e0 N\u1eebng:<\/em><\/p>\n

S\u1ed1 li\u1ec7u \u0111i\u1ec1u tra \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p \u1edf b\u1ea3ng 1.<\/p>\n

B\u1ea3ng 1<\/u>: T\u1ed5ng h\u1ee3p k\u1ebft qu\u1ea3 \u0111i\u1ec1u tra kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby t\u1ea1i Kon H\u00e0 N\u1eebng<\/p>\n\n\n\n\n\n\n
Pha di\u1ec5n th\u1ebf (n\u0103m)<\/td>\nT\u1ed5ng s\u1ed1 c\u00e2y c\u00f3 H<1,3m<\/p>\n

(C\u00e2y\/ha)<\/td>\n

S\u1ed1 c\u00e2y H>1,3<\/p>\n

D1,3<\/sub><5<\/td>\n

S\u1ed1 c\u00e2y H>1,3<\/p>\n

H1,3<\/sub>>5<\/td>\n

H b\u00ecnh qu\u00e2n (m)<\/td>\nG b\u00ecnh qu\u00e2n (m2<\/sup>\/ha)<\/td>\n\u0110\u1ed9 t\u00e0n che K<\/p>\n

(%)<\/td>\n

HL2<\/td>\n<\/tr>\n
1-3<\/td>\n3000<\/td>\n1300<\/td>\n280<\/p>\n

v=”63%<\/td>\n

4,8<\/p>\n

v=”21%<\/td>\n

1,7<\/p>\n

v=”21%<\/td>\n

1\/6<\/p>\n

v=”69%<\/td>\n<\/tr>\n

4-7<\/td>\n4600<\/td>\n1350<\/td>\n1120<\/p>\n

v=”45%<\/td>\n

11,5<\/p>\n

v=”20%<\/td>\n

10,4<\/p>\n

v=”68%<\/td>\n

0,4<\/p>\n

v= 36%<\/td>\n

1\/29<\/p>\n

v=”62%<\/td>\n<\/tr>\n

>7<\/td>\n4100<\/td>\n1400<\/td>\n1130<\/p>\n

v=”23%<\/td>\n

12,9<\/p>\n

v=”15%<\/td>\n

15,0<\/p>\n

v=”31%<\/td>\n

0,6<\/p>\n

v=”42%<\/td>\n

1\/18<\/p>\n

v=”44%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch s\u1ed1 li\u1ec7u thu \u0111\u01b0\u1ee3c cho th\u1ea5y ngay t\u1eeb n\u0103m \u0111\u1ea7u ti\u00ean b\u1ecf ho\u00e1, \u0111\u1ed9 che ph\u1ee7 c\u1ee7a th\u1ea3m th\u1ef1c v\u1eadt \u0111\u00e3 \u0111\u1ea1t \u0111\u1ebfn 100%, ch\u1ee7 y\u1ebfu l\u00e0 nh\u1eefng c\u00e2y th\u00e2n th\u1ea3o (th\u1ea3m c\u1ecf, d\u00e2y leo, c\u00e2y b\u1ee5i th\u1ea5p). Trong giai \u0111o\u1ea1n t\u1eeb 1-3 n\u0103m \u0111\u1ea7u, c\u00e1c lo\u00e0i c\u00e2y b\u1ee5i, c\u00e2y ti\u00ean phong \u01b0a s\u00e1ng c\u1ea1nh tranh m\u1ea1nh m\u1ebd v\u1edbi th\u1ea3m c\u1ecf n\u00e0y cho \u0111\u1ebfn khi n\u00f3 che b\u00f3ng v\u00e0 ti\u00eau di\u1ec7t d\u1ea7n th\u1ea3m c\u1ecf (t\u1eeb n\u0103m th\u1ee9 4). D\u00f9ng t\u1ef7 s\u1ed1 h\u1ed7n lo\u00e0i c\u1ee7a c\u00e1c nh\u00f3m lo\u00e0i c\u00f3 \u0111\u1ed9 nhi\u1ec1u t\u01b0\u01a1ng \u0111\u1ed1i >5%, ta th\u1ea5y: \u0111\u1ebfn tu\u1ed5i 3 ph\u00e2n bi\u1ec7t gi\u1eefa HL1 v\u00e0 HL2 ch\u01b0a r\u00f5 r\u00e0ng, ngh\u0129a l\u00e0 \u1edf giai \u0111o\u1ea1n \u0111\u1ea7u ch\u01b0a c\u00f3 lo\u00e0i n\u00e0o chi\u1ebfm \u01b0u th\u1ebf r\u00f5 r\u1ec7t. B\u1eaft \u0111\u1ea7u t\u1eeb tu\u1ed5i 4 HL2 gi\u1ea3m \u0111i r\u00f5 r\u1ec7t, c\u1ea5u t\u1ea1o l\u00e2m ph\u1ea7n l\u00fac n\u00e0y cho th\u1ea5y kh\u00e1 \u0111\u1ed3ng nh\u1ea5t v\u1ec1 m\u1eb7t t\u1ed5 h\u1ee3p lo\u00e0i. \u0110\u1ebfn tu\u1ed5i 8 HL2 l\u1ea1i l\u1edbn h\u01a1n v\u00ec s\u1ed1 lo\u00e0i c\u00f3 \u0111\u1ed9 nhi\u1ec1u >5% t\u0103ng l\u00ean, l\u00fac n\u00e0y s\u1ed1 c\u00e2y\/ha \u0111\u00e3 \u1ed5n \u0111\u1ecbnh h\u01a1n.<\/p>\n

V\u1edbi t\u1ef7 s\u1ed1 h\u1ed7n lo\u00e0i HL2 c\u00f3 th\u1ec3 ph\u00e2n di\u1ec5n th\u1ebf c\u1ee7a r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby t\u1ea1i v\u00f9ng nghi\u00ean c\u1ee9u ra 3 pha:<\/p>\n

Pha 1:<\/em>(t\u1eeb 1-3 n\u0103m): C\u00e2y b\u1ee5i ti\u00ean phong v\u1edbi m\u1ed9t t\u1ef7 l\u1ec7 h\u1ed7n lo\u00e0i t\u01b0\u01a1ng \u0111\u1ed1i cao (HL2=”1\/6″ v\u1edbi h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng v=”69%).” S\u1ed1 c\u00e1 th\u1ec3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c >5 cm v\u00e0 H>1,3 m trung b\u00ecnh l\u00e0 280 c\u00e2y\/ha (v=”63%),” ch\u00fang \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ed9t ti\u1ebft di\u1ec7n ngang kho\u1ea3ng 1,7 m2<\/sup>\/ha v\u00e0 chi\u1ec1u cao trung b\u00ecnh \u0111\u1ea1t 4,8 m (v=”21%),” c\u00e1c lo\u00e0i ch\u1ee7 y\u1ebfu xu\u1ea5t hi\u1ec7n trong pha n\u00e0y l\u00e0 c\u00e1c lo\u00e0i c\u00e2y ti\u00ean ph\u00f2ng \u01b0a s\u00e1ng: Hu \u0111ay, Ba soi, Ba b\u00e9t,… v\u1edbi m\u1ed9t s\u1ef1 t\u00e1i sinh r\u1ea5t phong ph\u00fa. \u0110\u1ed9 t\u00e0n che c\u1ee7a c\u00e1c c\u00e2y g\u1ed7 c\u00f3 chi\u1ec1u cao tr\u00ean 3m <0,3, theo ph\u00e2n lo\u1ea1i c\u1ee7a Tr\u1ea7n \u0110\u00ecnh L\u00fd xem nh\u01b0 ch\u01b0a c\u00f3 r\u1eebng.<\/p>\n

Pha 2:<\/em>(t\u1eeb 4-7 n\u0103m): R\u1eebng th\u1ee9 sinh non \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh v\u00e0 c\u00f3 \u0111\u1eb7c tr\u01b0ng r\u00f5 n\u00e9t v\u1ec1 s\u1ef1 \u0111\u1ed3ng nh\u1ea5t v\u1ec1 qu\u1ea7n th\u1ec3, h\u1ec7 s\u1ed1 h\u1ed7n lo\u00e0i nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi pha 1 (HL2=”1\/29″ v\u1edbi v=”62%)” do s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 c\u1ee7a c\u00e1c lo\u00e0i ti\u00ean phong d\u1eabn \u0111\u1ebfn. T\u1ed5ng s\u1ed1 c\u00e2y c\u00f3 D1,3<\/sub>>5 cm v\u00e0 H>1,3m \u0111\u1ea1t b\u00ecnh qu\u00e2n 1.120 c\u00e2y\/ha (v=”45%);” \u0111\u1ed9 t\u00e0n che \u0111\u1ea1t kho\u1ea3ng K=”0,4″ (bi\u1ebfn \u0111\u1ed9ng v=”36%).” Do t\u1ef7 l\u1ec7 c\u1ee7a c\u00e1c lo\u00e0i ti\u00ean phong \u01b0a s\u00e1ng (Hu \u0111ay) t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn (>48%) n\u00ean c\u00e1c lo\u00e0i c\u00f2n l\u1ea1i kh\u00e1c kh\u00f4ng c\u00f3 \u00fd ngh\u0129a th\u1ef1c t\u1ebf. Trong khi th\u00e0nh ph\u1ea7n th\u1ef1c v\u1eadt (qu\u1ea7n th\u1ec3) trong pha di\u1ec5n th\u1ebf n\u00e0y h\u1ea7u nh\u01b0 kh\u00f4ng thay \u0111\u1ed5i th\u00ec c\u1ea5u tr\u00fac k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3 bi\u1ebfn \u0111\u1ed5i r\u1ea5t m\u1ea1nh. Sinh tr\u01b0\u1edfng chi\u1ec1u cao m\u1ea1nh c\u1ee7a c\u00e1c lo\u00e0i Hu \u0111ay, Ba soi,… \u0111\u00e3 h\u00ecnh th\u00e0nh n\u00ean hai t\u1ea7ng r\u1eebng theo chi\u1ec1u th\u1eb3ng \u0111\u1ee9ng c\u1ee7a r\u1eebng th\u1ee9 sinh: T\u1ea7ng c\u00e2y b\u1ee5i v\u00e0 t\u1ea7ng c\u00e2y g\u1ed7 ph\u00eda tr\u00ean. Th\u1ea3m th\u1ef1c b\u00ec m\u1eb7t \u0111\u1ea5t h\u1ea7u nh\u01b0 \u0111\u00e3 b\u1ecb ti\u00eau di\u1ec7t, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c lo\u00e0i \u01b0a b\u00f3ng ph\u00e1t tri\u1ec3n. Chi\u1ec1u cao b\u00ecnh qu\u00e2n c\u1ee7a r\u1eebng l\u00fac n\u00e0y \u0111\u1ea1t 11,5 m (v=”20%)” v\u1edbi ti\u1ebft di\u1ec7n ngang ch\u1eebng 10,4 m2<\/sup> (v=”68%).”<\/p>\n

Pha 3<\/u>: (tr\u00ean 7 n\u0103m): So v\u1edbi 2 pha \u0111\u1ea7u, r\u1eebng c\u00f3 c\u1ea5u tr\u00fac qu\u1ea7n th\u1ec3 ph\u1ee9c t\u1ea1p v\u00e0 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n. H\u1ec7 s\u1ed1 h\u1ed7n lo\u00e0i b\u00ecnh qu\u00e2n HL2=”1\/18″ (v=”44%).” V\u00e0o \u0111\u1ea7u pha n\u00e0y, c\u00e1c lo\u00e0i c\u00e2y ti\u00ean phong \u01b0a s\u00e1ng c\u00f3 d\u1ea5u hi\u1ec7u gi\u1ea3m d\u1ea7n v\u1ec1 \u0111\u1ed9 nhi\u1ec1u, c\u00e1c c\u00e1 th\u1ec3 c\u1ee7a nh\u1eefng lo\u00e0i \u01b0a b\u00f3ng (c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf) t\u0103ng d\u1ea7n l\u00ean thay v\u00e0o \u0111\u00f3, v\u00ec v\u1eady m\u00e0 t\u1ed5ng s\u1ed1 c\u00e2y b\u00ecnh qu\u00e2n\/ha so v\u1edbi pha 2 kh\u00f4ng m\u1ea5y thay \u0111\u1ed5i, \u0111\u1ea1t 1.130 c\u00e2y\/ha (v=”23%),” nh\u01b0ng do t\u00e1n c\u1ee7a n\u00f3 ph\u00e1t tri\u1ec3n m\u1ea1nh n\u00ean \u0111\u1ed9 t\u00e0n che \u0111\u00e3 \u0111\u01b0\u1ee3c n\u00e2ng l\u00ean (K= 0,6 ; v=”42%).” Trong khi c\u00e1c \u0111\u1ea1i di\u1ec7n c\u1ee7a nh\u00f3m lo\u00e0i c\u00e2y ti\u00ean phong kh\u00f4ng th\u1ea5y xu\u1ea5t hi\u1ec7n c\u00e2y t\u00e1i sinh, th\u00ec c\u00e1c lo\u00e0i kh\u00e1c c\u00f3 s\u1ef1 t\u00e1i sinh kh\u00e1 m\u1ea1nh m\u1ebd (tr\u00ean 4.000 c\u00e2y\/ha). Nh\u01b0ng l\u1edbp c\u00e2y t\u00e1i sinh n\u00e0y kh\u00f4ng \u0111\u1ee7 \u00e1nh s\u00e1nh \u0111\u1ec3 ch\u00fang sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n. C\u00e2y t\u00e1i sinh c\u00f3 chi\u1ec1u cao tr\u00ean 1,3 m h\u1ea7u nh\u01b0 kh\u00f4ng t\u0103ng l\u00ean so v\u1edbi pha 2. Chi\u1ec1u cao b\u00ecnh qu\u00e2n c\u1ee7a r\u1eebng trong pha n\u00e0y \u0111\u1ea1t 12,9 m. (v=”15%)” v\u00e0 ti\u1ebft di\u1ec7n ngang l\u00e0 15 m2<\/sup>\/ha (v=”31%). Tuy nhi\u00ean, s\u1ef1 ph\u00e2n chia th\u1eddi gian c\u00e1c pha di\u1ec5n th\u1ebf tr\u00ean \u0111\u00e2y ch\u1ec9 mang t\u00ednh ch\u1ea5t t\u01b0\u01a1ng \u0111\u1ed1i m\u00e0 th\u00f4i v\u00ec kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby c\u00f2n ph\u1ee5 thu\u1ed9c kh\u00e1 nhi\u1ec1u v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 kh\u00e1c nh\u01b0 c\u01b0\u1eddng \u0111\u1ed9 canh t\u00e1c, c\u1ef1 ly t\u1eeb r\u1eaby t\u1edbi v\u00e1ch r\u1eebng t\u1ef1 nhi\u00ean (kh\u1ea3 n\u0103ng gieo gi\u1ed1ng c\u1ee7a r\u1eebng),… Ch\u00ednh v\u00ec v\u1eady m\u00e0 th\u1eddi gian c\u1ee7a pha 1 c\u00f3 th\u1ec3 k\u00e9o d\u00e0i t\u1edbi 4-5 n\u0103m, pha 2 c\u00f3 th\u1ec3 k\u00e9o d\u00e0i t\u1edbi t\u1eeb n\u0103m th\u1ee9 5 t\u1edbi n\u0103m th\u1ee9 9-10.<\/p>\n

S\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea c\u00e1c lo\u00e0i c\u00f3 m\u1eb7t trong c\u00e1c \u00f4 ti\u00eau chu\u1ea9n l\u00e0 45 lo\u00e0i, \u0111\u1ea1t b\u00ecnh qu\u00e2n t\u1eeb 26-40 lo\u00e0i\/ha, so v\u1edbi r\u1eebng t\u1ef1 nhi\u00ean \u1edf Kon H\u00e0 N\u1eebng kho\u1ea3ng 60-70 lo\u00e0i\/ha. Nh\u01b0 v\u1eady, s\u1ef1 phong ph\u00fa v\u1ec1 lo\u00e0i \u1edf r\u1eebng t\u1ef1 nhi\u00ean ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby \u0111\u00e3 gi\u1ea3m \u0111i m\u1ed9t c\u00e1ch \u0111\u00e1ng k\u1ec3, ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng c\u0169ng b\u1ecb gi\u1ea3m s\u00fat. \u0110i\u1ec1u n\u00e0y c\u0169ng ph\u00f9 h\u1ee3p v\u1edbi nh\u1eadn \u0111\u1ecbnh v\u00e0 \u0111\u00e1nh gi\u00e1 cho r\u1eb1ng ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh di\u1ec5n th\u1ebf \u0111i xu\u1ed1ng, ph\u1ea3i m\u1ea5t m\u1ed9t th\u1eddi gian r\u1ea5t d\u00e0i ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng m\u1edbi \u0111\u1ea1t \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch c\u00e1c lo\u00e0i t\u00e1i sinh xu\u1ea5t hi\u1ec7n trong r\u1eebng ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby \u1edf Kon H\u00e0 N\u1eebng trong 3 pha di\u1ec5n th\u1ebf cho ph\u00e9p ph\u00e2n chia th\u00e0nh 3 nh\u00f3m lo\u00e0i theo ph\u1ea3n \u1ee9ng ph\u00e1t tri\u1ec3n (t\u00e1i sinh, s\u1ed1 c\u00e1 th\u1ec3, ph\u00e1t tri\u1ec3n chi\u1ec1u cao, \u0111\u01b0\u1eddng k\u00ednh,…):<\/p>\n

–Nh\u00f3m th\u1ee9 nh\u1ea5t<\/em>: G\u1ed3m nh\u1eefng lo\u00e0i c\u00e2y ti\u00ean phong t\u1ea1m c\u01b0 c\u00f3 \u0111\u1eddi s\u1ed1ng ng\u1eafn, gi\u00e1 tr\u1ecb kinh t\u1ebf kh\u00f4ng cao ch\u1ee7 y\u1ebfu thu\u1ed9c c\u00e1c h\u1ecd: Th\u1ea7u d\u1ea7u (Euphorbiaceae<\/em>), c\u00e0 ph\u00ea (Rubiaceae<\/em>),… th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf pha \u0111\u1ea7u v\u1edbi s\u1ed1 l\u01b0\u01a1ng r\u1ea5t l\u1edbn v\u00e0 gi\u1ea3m d\u1ea7n \u1edf cu\u1ed1i pha 2 v\u00e0 m\u1ea5t h\u1eb3n \u1edf pha 3.<\/p>\n

-Nh\u00f3m th\u1ee9 hai:<\/em>l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y \u01b0a s\u00e1ng, ch\u1ecbu \u0111\u01b0\u1ee3c b\u00f3ng trong giai \u0111o\u1ea1n \u0111\u1ea7u, xu\u1ea5t hi\u1ec7n v\u00e0o cu\u1ed1i pha 1 (t\u1eeb n\u0103m th\u1ee9 3) v\u00e0 sinh tr\u01b0\u1edfng r\u1ea5t nhanh v\u1ec1 chi\u1ec1u cao \u0111\u1ec3 v\u01b0\u01a1n l\u00ean t\u1ea7ng tr\u00ean. \u0110\u00e2y l\u00e0 c\u00e1c lo\u00e0i c\u00e2y thu\u1ed9c nh\u00f3m g\u1ed7 t\u1eeb IV-VIII \u1edf c\u00e1c h\u1ecd: Xoan (Meliaceae<\/em>), h\u1ecd Long n\u00e3o (Lauraceae<\/em>), h\u1ecd \u0110\u1eadu (Fabaceae<\/em>), h\u1ecd D\u1ea7u (Dipterocarpaceae<\/em>).<\/p>\n

–Nh\u00f3m th\u1ee9 3<\/u>: g\u1ed3m c\u00e1c lo\u00e0i ch\u1ecbu b\u00f3ng, ph\u00e1t tri\u1ec3n ch\u1eadm, g\u1ed7 c\u00f3 gi\u00e1 tr\u1ecb cao xu\u1ea5t hi\u1ec7n nhi\u1ec1u d\u1ea7n \u1edf pha hai khi c\u00e1c lo\u00e0i ti\u00ean phong \u0111\u00e3 ph\u1ee7 k\u00edn ti\u00eau di\u1ec7t h\u1ebft th\u1ea3m th\u1ef1c b\u00ec m\u1eb7t \u0111\u1ea5t.<\/p>\n

2.2 M\u1ed9t s\u1ed1 k\u1ebft lu\u1eadn b\u01b0\u1edbc \u0111\u1ea7u<\/em>:<\/p>\n

R\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh c\u00f3 qu\u00e1 tr\u00ecnh t\u00e1i sinh v\u00e0 di\u1ec5n th\u1ebf sau n\u01b0\u01a1ng r\u1eaby ph\u1ee9c t\u1ea1p, c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c ba pha di\u1ec5n th\u1ebf v\u1edbi nh\u1eefng \u0111\u1eb7c tr\u01b0ng \u0111\u1ed9ng th\u00e1i r\u00f5 r\u00e0ng. Sau khi b\u1ecf h\u00f3a tr\u00ean 10 n\u0103m, r\u1eebng ph\u1ee5c h\u1ed3i c\u00f3 th\u00e0nh ph\u1ea7n th\u1ef1c v\u1eadt g\u1ea7n v\u1edbi r\u1eebng t\u1ef1 nhi\u00ean ch\u01b0a b\u1ecb t\u00e1c \u0111\u1ed9ng m\u1ea1nh. Tuy nhi\u00ean s\u1ef1 phong ph\u00fa v\u1ec1 lo\u00e0i kh\u00f4ng b\u1eb1ng r\u1eebng nguy\u00ean sinh v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng k\u00e9m h\u01a1n nhi\u1ec1u. Qu\u00e1 tr\u00ecnh di\u1ec5n th\u1ebf c\u1ee7a r\u1eebng th\u01b0\u1eddng c\u00f3 xu h\u01b0\u1edbng \u0111i xu\u1ed1ng.<\/p>\n

Mu\u1ed1n di\u1ec7n t\u00edch canh t\u00e1c n\u01b0\u01a1ng r\u1eaby \u0111\u01b0\u1ee3c h\u1ed3i ph\u1ee5c th\u00e0nh r\u1eebng c\u00f3 hi\u1ec7u qu\u1ea3, c\u1ea7n ph\u1ea3i h\u1ed9i t\u1ee5 \u0111\u1ee7 c\u00e1c \u0111i\u1ec1u ki\u1ec7n sau: (i) Di\u1ec7n t\u00edch l\u00e0m r\u1eaby kh\u00f4ng qu\u00e1 l\u1edbn (d\u01b0\u1edbi 3 ha), v\u00e0 xung quanh r\u1eaby b\u1ecf h\u00f3a ph\u1ea3i c\u00f3 r\u1eebng t\u1ef1 nhi\u00ean, ho\u1eb7c tr\u00ean di\u1ec7n t\u00edch l\u00e0m r\u1eaby ph\u1ea3i ch\u1eeba l\u1ea1i \u0111\u1ee7 s\u1ed1 l\u01b0\u1ee3ng c\u00e2y m\u1eb9 \u0111\u1ec3 gieo gi\u1ed1ng; (ii) Qu\u00e1 tr\u00ecnh b\u1ecf h\u00f3a \u0111\u1ec3 r\u1eebng ph\u1ee5c h\u1ed3i c\u1ea7n \u0111\u1ee7 l\u1edbn tr\u00ean 15 n\u0103m; (iii) Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u1ea7n thi\u1ebft n\u00ean \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p x\u00fac ti\u1ebfn t\u00e1i sinh \u0111\u1ec3 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby nh\u01b0: \u0111\u1ed1t th\u1ea3m th\u1ef1c b\u00ec; x\u00fac ti\u1ebfn t\u00e1i sinh b\u1eb1ng t\u00e1c \u0111\u1ed9ng x\u1edbi \u0111\u1ea5t \u0111\u1ec3 h\u1ea1t ti\u1ebfp x\u00fac t\u1ed1t; tr\u1ed3ng b\u1ed5 sung; h\u1ea1n ch\u1ebf l\u1eeda r\u1eebng trong nh\u1eefng n\u0103m \u0111\u1ea7u,…<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/p>\n

1. Tr\u1ea7n V\u0103n Con: \u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng sau n\u01b0\u01a1ng r\u1eaby. Trung t\u00e2m L\u00e2m nghi\u1ec7p nhi\u1ec7t \u0111\u1edbi, Gia Lai th\u00e1ng 12 n\u0103m 2000.<\/p>\n

2. Tr\u1ea7n \u0110\u00ecnh L\u00fd: Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh di\u1ec7n t\u00edch v\u00e0 h\u1ec7 th\u1ed1ng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt cho vi\u1ec7c khoanh nu\u00f4i ph\u1ee5c h\u1ed3i r\u1eebng. Ch\u01b0\u01a1ng tr\u00ecnh khoa h\u1ecdc c\u00f4ng ngh\u1ec7 c\u1ea5p Nh\u00e0 n\u01b0\u1edbc: Kh\u00f4i ph\u1ee5c r\u1eebng v\u00e0 ph\u00e1t tri\u1ec3n l\u00e2m nghi\u1ec7p, m\u00e3 s\u1ed1 KN.03. Nh\u00e0 xu\u1ea5t b\u1ea3n N\u00f4ng nghi\u1ec7p H\u00e0 N\u1ed9i 1996.<\/p>\n

3. \u0110\u1ed7 \u0110\u00ecnh S\u00e2m: T\u1ed5ng lu\u1eadn ph\u00e2n t\u00edch n\u00f4ng nghi\u1ec7p du canh \u1edf Vi\u1ec7t Nam. Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam, H\u00e0 N\u1ed9i 1996.<\/p>\n

Preliminary research results on potential rehabilitation of natural evergreen broad-leaved forests after slash-and-burn cultivation in the Central Highland.<\/p>\n

Summary:<\/em>Natural evergreen broad-leaved forests undergo complex and long-term regeneration and rehabilitation process after slash and burn cultivation. Three forest succession phases however can be identified through features concerning tree species; Phase1: from the 1st<\/sup> to 3rd<\/sup> year: The phase of pioneer, light demanding bush and small timber tree species with short life; Phase 2: From the 4th<\/sup> to 7th<\/sup> year: The phase of young forest with pioneer light demanding and shade tolerant species as dominant ones in early stage; Phase 3: From 8th<\/sup> year on wards: Rehabilitated forest with restored initial species composition and there appear shade tolerant, slow-growth species with timber of high economic value.<\/p>\n

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K\u1ebft qu\u1ea3 b\u01b0\u1edbc \u0111\u1ea7u v\u00e0 m\u1ed9t s\u1ed1 kinh nghi\u1ec7m t\u1eeb d\u1ef1 \u00e1n:<\/p>\n

“\u00e1p d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ea5t h\u1ee3p l\u00fd<\/em><\/p>\n

nh\u1eb1m ph\u1ee5c h\u1ed3i m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i v\u00e0 g\u00f3p ph\u1ea7n t\u0103ng thu nh\u1eadp c\u1ee7a n\u00f4ng d\u00e2n v\u00f9ng n\u00fai Nham Bi\u1ec1n, huy\u1ec7n Y\u00ean D\u0169ng – B\u1eafc Giang “<\/em><\/p>\n

Ng\u00f4 \u0110\u00ecnh Qu\u1ebf v\u00e0 c\u1ed9ng s\u1ef1<\/p>\n

Trung t\u00e2m Nc Sinh th\u00e1I v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/em><\/p>\n

Y\u00ean D\u0169ng l\u00e0 huy\u1ec7n mi\u1ec1n n\u00fai ngh\u00e8o c\u1ee7a t\u1ec9nh B\u1eafc Giang. T\u00e0i nguy\u00ean r\u1eebng c\u1ea1n ki\u1ec7t. To\u00e0n b\u1ed9 r\u1eebng t\u1ef1 nhi\u00ean b\u1ecb ph\u00e1 hu\u1ef7 t\u1eeb nhi\u1ec1u th\u1eadp k\u1ef7 n\u00ean ph\u1ea7n \u0111\u1ed3i n\u00fai b\u1ecb x\u00f3i m\u00f2n nghi\u00eam tr\u1ecdng. R\u1eebng th\u00f4ng tr\u1ed3ng \u0111\u1ebfn n\u0103m 1984 b\u1ecb ph\u00e1 hu\u1ef7 ho\u00e0n to\u00e0n. R\u1eebng tr\u1ed3ng ch\u1ec9 c\u00f3 876 ha m\u1edbi tr\u1ed3ng trong 5 n\u0103m g\u1ea7n \u0111\u00e2y. \u0110\u1ea5t l\u00e2m nghi\u1ec7p c\u00f2n l\u1ea1i l\u00e0 \u0111\u1ed3i n\u00fai tr\u1ecdc t\u1eadp trung \u1edf n\u00fai Nham Bi\u1ec1n. \u0110\u00e2y l\u00e0 m\u1ed9t d\u1ea3i n\u00fai c\u00f3 di\u1ec7n t\u00edch kho\u1ea3ng 2000ha n\u1eb1m \u1edf gi\u1eefa \u0111\u1ed3ng b\u1eb1ng v\u1edbi g\u1ea7n 100 ng\u1ecdn n\u00fai cao th\u1ea5p kh\u00e1c nhau. C\u00e1c \u0111\u1ec9nh cao nh\u1ea5t 261 m, \u0111\u1ec9nh trung b\u00ecnh v\u00e0 th\u1ea5p kho\u1ea3ng 100m tr\u00ean m\u1eb7t bi\u1ec3n.<\/p>\n

Th\u1ef1c hi\u1ec7n Ngh\u1ecb quy\u1ebft 22 c\u1ee7a B\u1ed9 Ch\u00ednh tr\u1ecb v\u00e0 Quy\u1ebft \u0111\u1ecbnh s\u1ed1 72 \/ H\u0110BT c\u1ee7a Ch\u00ednh ph\u1ee7 v\u1ec1 vi\u1ec7c ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n kinh t\u1ebf x\u00e3 h\u1ed9i \u1edf mi\u1ec1n n\u00fai nh\u1eb1m \u1ed5n \u0111\u1ecbnh v\u00e0 n\u00e2ng cao \u0111\u1eddi s\u1ed1ng c\u1ee7a \u0111\u1ed3ng b\u00e0o c\u00e1c d\u00e2n t\u1ed9c, B\u1ed9 Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 v\u00e0 M\u00f4i tr\u01b0\u1eddng trong c\u00e1c ho\u1ea1t \u0111\u1ed9ng h\u1ed7 tr\u1ee3 khoa h\u1ecdc c\u00f4ng ngh\u1ec7 c\u00e1c t\u1ec9nh mi\u1ec1n n\u00fai v\u00e0 d\u00e2n t\u1ed9c \u0111\u00e3 ch\u1ea5p thu\u1eadn cho x\u00e2y d\u1ef1ng v\u00e0 t\u1ed5 ch\u1ee9c th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n : “\u00e1p d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ea5t h\u1ee3p l\u00fd nh\u1eb1m ph\u1ee5c h\u1ed3i m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i v\u00e0 g\u00f3p ph\u1ea7n t\u0103ng thu nh\u1eadp c\u1ee7a n\u00f4ng d\u00e2n v\u00f9ng n\u00fai Nham Bi\u1ec1n huy\u1ec7n Y\u00ean D\u0169ng – B\u1eafc Giang<\/em> ” v\u00e0 giao cho Trung t\u00e2m Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng ph\u1ed1i h\u1ee3p v\u1edbi S\u1edf Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 v\u00e0 MT t\u1ec9nh B\u1eafc Giang th\u1ef1c hi\u1ec7n t\u1eeb th\u00e1ng 12 \/ 1997 – 12 \/ 2000.<\/p>\n

Hai \u0111i\u1ec3m \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh l\u00e0 th\u00f4n B\u00ecnh An thu\u1ed9c x\u00e3 Ti\u1ec1n Phong v\u00e0 l\u00e0ng V\u00e2y thu\u1ed9c th\u1ecb tr\u1ea5n Neo. Hai th\u00f4n n\u00e0y \u0111\u1ea1i di\u1ec7n cho c\u00e1c x\u00e3 thu\u1ed9c khu v\u1ef1c n\u00fai Nham Bi\u1ec1n, huy\u1ec7n Y\u00ean D\u0169ng.<\/p>\n

M\u1ee5c ti\u00eau, n\u1ed9i dung v\u00e0 ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a d\u1ef1 \u00e1n<\/p>\n

1.1. M\u1ee5c ti\u00eau c\u1ee7a d\u1ef1 \u00e1n <\/em><\/p>\n

+ T\u1ea1o \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ea5t d\u1ed1c, b\u1ec1n v\u1eefng, ph\u00f9 h\u1ee3p cho \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ea5t \u0111\u1ed3i n\u00fai tr\u1ecdc b\u1ecb suy tho\u00e1i \u0111i\u1ec3n h\u00ecnh t\u1ea1i n\u00fai Nham Bi\u1ec1n, nh\u1eb1m ph\u1ee5c h\u1ed3i m\u00f4i tr\u01b0\u1eddng v\u00e0 \u0111\u01b0a l\u1ea1i thu nh\u1eadp l\u00e2u d\u00e0i cho h\u1ed9 n\u00f4ng d\u00e2n v\u00f9ng trung du.<\/p>\n

+ Chuy\u1ec3n giao c\u00e1c m\u00f4 h\u00ecnh k\u1ef9 thu\u1eadt n\u00f3i tr\u00ean cho n\u00f4ng d\u00e2n trong huy\u1ec7n h\u1ecdc t\u1eadp v\u00e0 \u00e1p d\u1ee5ng \u1edf c\u00e1c n\u01a1i c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng t\u1ef1.<\/p>\n

1.2. N\u1ed9i dung. <\/em><\/p>\n

N\u1ed9i dung 1.<\/em>X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh ph\u1ee5c h\u1ed3i r\u1eebng ph\u1ea7n s\u01b0\u1eddn v\u00e0 \u0111\u1ec9nh n\u00fai Nham Bi\u1ec1n nh\u1eb1m ch\u1ed1ng x\u00f3i l\u1edf, b\u1ea3o v\u1ec7 v\u01b0\u1eddn qu\u1ea3 v\u00e0 t\u1ea1o m\u00f4i tr\u01b0\u1eddng s\u1ed1ng cho c\u00e1c l\u00e0ng m\u1ea1c xung quanh (20ha\/ 20 h\u1ed9 gia \u0111\u00ecnh). C\u00e1c c\u00e2y ch\u00ednh l\u00e0: Th\u00f4ng Caribeae, tr\u00e1m, keo, … v\u00e0 c\u00e2y h\u1ecd \u0110\u1eadu ph\u1ee7 \u0111\u1ea5t nh\u01b0: C\u1ed1t kh\u00ed, \u0111\u1eadu tri\u1ec1u …<\/p>\n

N\u1ed9i dung 2.<\/u><\/em>X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh c\u00e2y \u0103n qu\u1ea3 th\u00e2n g\u1ed7 d\u00e0i ng\u00e0y tr\u00ean \u0111\u1ea5t d\u1ed1c nh\u1eb1m t\u0103ng thu nh\u1eadp, ph\u1ee7 xanh \u0111\u1ea5t v\u1edbi di\u1ec7n t\u00edch 10ha\/ 20 h\u1ed9 gia \u0111\u00ecnh. C\u00e2y ch\u00ednh l\u00e0 v\u1ea3i thi\u1ec1u, nh\u00e3n, na v\u00e0 b\u1ed5 sung c\u00e2y m\u1edbi nh\u01b0 h\u1ed3ng, xo\u00e0i gh\u00e9p, \u0111u \u0111\u1ee7 \u0110\u00e0i Loan, d\u1ee9a.<\/p>\n

N\u1ed9i dung 3.<\/em>T\u1eadp hu\u1ea5n \u0111\u1ec3 chuy\u1ec3n giao c\u00e1c k\u1ef9 thu\u1eadt n\u00f3i tr\u00ean cho 10 x\u00e3 quanh n\u00fai Nham Bi\u1ec1n. Ngo\u00e0i ra d\u1ef1 \u00e1n s\u1ebd \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p v\u00e0 ch\u00ednh s\u00e1ch li\u00ean quan \u0111\u1ebfn \u00e1p d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt cho d\u1ef1 \u00e1n 5 tri\u1ec7u ha r\u1eebng \u1edf c\u00e1c v\u00f9ng t\u01b0\u01a1ng t\u1ef1.<\/p>\n

1.3 Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfn h\u00e0nh. <\/em><\/p>\n

– Th\u1ea3o lu\u1eadn b\u00e0n b\u1ea1c th\u1ed1ng nh\u1ea5t v\u1edbi ch\u00ednh quy\u1ec1n \u0111\u1ecba ph\u01b0\u01a1ng t\u1eeb t\u1ec9nh \u0111\u1ebfn huy\u1ec7n v\u00e0 x\u00e3 n\u01a1i th\u1ef1c thi d\u1ef1 \u00e1n nh\u01b0: Th\u00e0nh l\u1eadp Ban ch\u1ec9 \u0111\u1ea1o v\u00e0 \u0111i\u1ec1u h\u00e0nh d\u1ef1 \u00e1n, \u0111\u1ecba \u0111i\u1ec3m v\u00e0 s\u1ed1 h\u1ed9 tham gia.<\/p>\n

– Th\u00e0nh l\u1eadp c\u00e1c nh\u00f3m h\u1ed9 th\u1ef1c hi\u1ec7n m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c xem x\u00e9t v\u1ec1 \u0111i\u1ec1u ki\u1ec7n v\u00e0 n\u0103ng l\u1ef1c ti\u1ebfp nh\u1eadn, tr\u00ean c\u01a1 s\u1edf t\u1ef1 nguy\u1ec7n c\u00f3 lao \u0111\u1ed9ng v\u00e0 \u0111\u1ea5t \u0111\u01b0\u1ee3c giao, c\u00f3 nh\u00f3m tr\u01b0\u1edfng l\u00e0 ng\u01b0\u1eddi \u0111\u1ea1i di\u1ec7n t\u1ed5 ch\u1ee9c, v\u1eadn \u0111\u1ed9ng, ti\u1ebfp nh\u1eadn v\u1eadt t\u01b0 c\u00e2y gi\u1ed1ng cho c\u00e1c h\u1ed9 trong nh\u00f3m.<\/p>\n

– Huy \u0111\u1ed9ng \u0111\u1ed9i ng\u0169 c\u00e1n b\u1ed9 KHKT, c\u00e1c chuy\u00ean gia c\u00f3 kinh nghi\u1ec7m c\u1ee7a \u0111\u01a1n v\u1ecb, S\u1edf Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 v\u00e0 M\u00f4i tr\u01b0\u1eddng, Ph\u00f2ng N\u00f4ng nghi\u1ec7p huy\u1ec7n tr\u1ef1c ti\u1ebfp tham gia tri\u1ec3n khai tr\u00ean c\u01a1 s\u1edf th\u1ed1ng nh\u1ea5t c\u01a1 ch\u1ebf ch\u00ednh s\u00e1ch khuy\u1ebfn kh\u00edch c\u00e1n b\u1ed9 l\u00e0m vi\u1ec7c \u1edf \u0111\u1ecba ph\u01b0\u01a1ng.<\/p>\n

– Thi\u1ebft k\u1ebf \u0111o \u0111\u1ea1c m\u00f4 h\u00ecnh cho t\u1eebng h\u1ed9 tham gia d\u1ef1 \u00e1n.<\/p>\n

– T\u1eadp hu\u1ea5n k\u1ef9 thu\u1eadt: M\u1edf c\u00e1c l\u1edbp t\u1eadp hu\u1ea5n cho ng\u01b0\u1eddi d\u00e2n tham gia d\u1ef1 \u00e1n v\u1ec1 k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng, ch\u0103m s\u00f3c c\u00e2y r\u1eebng, c\u00e2y \u0103n qu\u1ea3, k\u1ef9 thu\u1eadt canh t\u00e1c tr\u00ean \u0111\u1ea5t d\u1ed1c, qu\u1ea3n l\u00fd trang tr\u1ea1i. T\u1ed5 ch\u1ee9c tham quan h\u1ecdc t\u1eadp kinh nghi\u1ec7m \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng kh\u00e1c n\u01a1i c\u00f3 m\u00f4 h\u00ecnh s\u1ea3n xu\u1ea5t gi\u1ecfi.<\/p>\n

– T\u1ed5 ch\u1ee9c h\u1ed9i ngh\u1ecb \u0111\u1ea7u b\u1edd, s\u01a1 t\u1ed5ng k\u1ebft t\u1eebng giai \u0111o\u1ea1n, r\u00fat kinh nghi\u1ec7m, \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 kinh t\u1ebf x\u00e3 h\u1ed9i v\u00e0 m\u00f4i tr\u01b0\u1eddng c\u1ee7a d\u1ef1 \u00e1n. 2. C\u00e1c k\u1ebft qu\u1ea3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ee7a d\u1ef1 \u00e1n<\/p>\n

2.1. X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng ph\u1ee5c h\u1ed3i m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i v\u00f9ng \u0111\u1ed3i n\u00fai tr\u1ecdc Nham Bi\u1ec1n. <\/em><\/p>\n

– V\u1edbi s\u1ef1 tham gia c\u1ee7a 21 h\u1ed9 gia \u0111\u00ecnh d\u1ef1 \u00e1n \u0111\u00e3 tr\u1ed3ng 16 ha th\u00f4ng trong \u0111\u00f3 c\u00f3 12.5ha r\u1eebng th\u00f4ng Caribeae. T\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh 90 – 95%, th\u00f4ng sinh tr\u01b0\u1edfng t\u1ed1t, trong \u0111\u00f3 th\u00f4ng Caribeae sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n h\u1eb3n th\u00f4ng nh\u1ef1a.<\/p>\n

Sau 3 n\u0103m th\u00f4ng Caribeae c\u00f3 D = 6.8cm, v\u00e0 chi\u1ec1u cao H = 1.68m; th\u00f4ng nh\u1ef1a c\u00f3 D = 6.2cm, v\u00e0 chi\u1ec1u cao H = 1.55m.<\/p>\n

– \u0110\u00e3 tr\u1ed3ng \u0111\u01b0\u1ee3c 3ha keo l\u00e1 tr\u00e0m (Acacia auriculiformis<\/em>) theo b\u0103ng. T\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh \u0111\u1ea1t t\u1eeb 85 – 90%. Sinh tr\u01b0\u1edfng c\u1ee7a keo l\u00e1 tr\u00e0m \u1edf m\u1ee9c trung b\u00ecnh. Sau 3 n\u0103m, keo l\u00e1 tr\u00e0m c\u00f3 D = 6.0cm v\u00e0 c\u00f3 chi\u1ec1u cao trung b\u00ecnh H = 3.5m.<\/p>\n

– \u0110\u00e3 tr\u1ed3ng \u0111\u01b0\u1ee3c 1ha tr\u00e1m tr\u1eafng (Canarium album<\/em> ).<\/p>\n

– D\u1ef1 \u00e1n \u0111\u00e3 tr\u1ed3ng th\u00eam ngo\u00e0i k\u1ebf ho\u1ea1ch 1ha S\u1edf v\u1edbi t\u1ed5ng s\u1ed1 2000 c\u00e2y. T\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh \u0111\u1ea1t 60 – 65%; sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y s\u1edf nh\u00ecn chung x\u1ea5u, t\u1ecf ra kh\u00f4ng th\u00edch h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba v\u00f9ng n\u00fai tr\u1ecdc Nham Bi\u1ec1n.<\/p>\n

Nh\u01b0 v\u1eady, d\u1ef1 \u00e1n \u0111\u00e3 tr\u1ed3ng \u0111\u01b0\u1ee3c 21 ha (l\u00e0m th\u00eam 1 ha S\u1edf). C\u00e1c c\u00e2y tr\u1ed3ng r\u1eebng nh\u00ecn chung sinh tr\u01b0\u1edfng t\u1ed1t v\u00e0 c\u00f3 nhi\u1ec1u tri\u1ec3n v\u1ecdng; t\u1eeb \u0111\u00f3 \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh c\u01a1 c\u1ea5u c\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng c\u1ee7a d\u1ef1 \u00e1n l\u00e0 c\u00f3 c\u01a1 s\u1edf khoa h\u1ecdc v\u00e0 th\u1ef1c ti\u1ec5n.<\/p>\n

2.2. X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh v\u01b0\u1eddn qu\u1ea3 tr\u00ean \u0111\u1ea5t d\u1ed1c.<\/em><\/p>\n

D\u1ef1 \u00e1n \u0111\u00e3 cung c\u1ea5p h\u01a1n 3000 c\u00e2y gi\u1ed1ng \u0103n qu\u1ea3, ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1c gi\u1ed1ng c\u00e2y th\u00e2n g\u1ed7 d\u00e0i ng\u00e0y, c\u00f3 t\u00e1n l\u00e1 r\u1ed9ng, \u0111\u1ed9 che ph\u1ee7 \u0111\u1ea5t t\u1ed1t, r\u1ec5 \u0103n s\u00e2u, ph\u00f9 h\u1ee3p v\u1edbi kh\u00ed h\u1eadu v\u00e0 \u0111\u1ea5t \u0111ai \u1edf Y\u00ean D\u0169ng, c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf t\u01b0\u01a1ng \u0111\u1ed1i cao v\u00e0 c\u00f3 th\u1ecb tr\u01b0\u1eddng ti\u00eau th\u1ee5 l\u00e2u d\u00e0i nh\u01b0: V\u1ea3i thi\u1ec1u L\u1ee5c Ng\u1ea1n (gi\u1ed1ng chi\u1ebft), h\u1ed3ng kh\u00f4ng h\u1ea1t, xo\u00e0i (g\u1ed1c gh\u00e9p Y\u00ean Ch\u00e2u + m\u1eaft gh\u00e9p Qu\u1ea3ng \u0110\u00f4ng -Trung Qu\u1ed1c), na dai, \u0111u \u0111\u1ee7 \u0110\u00e0i Loan, qu\u00fdt, d\u1ee9a \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c \u0111\u01b0\u1eddng b\u0103ng c\u00e2y xanh, ng\u0103n c\u1ea3n d\u00f2ng ch\u1ea3y ch\u1ed1ng x\u00f3i m\u00f2n \u0111\u1ea5t.<\/p>\n

– D\u1ef1 \u00e1n \u0111\u00e3 cung c\u1ea5p cho d\u00e2n 13.500kg ph\u00e2n NPK \u0111\u1ec3 b\u00f3n l\u00f3t cho c\u00e1c c\u00e2y \u0103n qu\u1ea3, m\u1ed9t s\u1ed1 c\u00e2y l\u00e2m nghi\u1ec7p v\u00e0 ti\u1ec1n m\u1eb7t \u0111\u1ec3 x\u00e2y d\u1ef1ng b\u1ec3 n\u01b0\u1edbc treo n\u1eb1m ngang s\u01b0\u1eddn \u0111\u1ed3i, tr\u1eef n\u01b0\u1edbc t\u01b0\u1edbi cho v\u01b0\u1eddn qu\u1ea3 trong m\u00f9a m\u01b0a v\u00e0 m\u00f9a kh\u00f4.<\/p>\n

– H\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt s\u1eed d\u1ee5ng th\u01b0\u1edbc ch\u1eef A \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c b\u1eadc thang tr\u1ed3ng c\u00e2y \u0103n qu\u1ea3 v\u00e0 c\u00e1c b\u0103ng c\u00e2y xanh: C\u1ed1t kh\u00ed + d\u1ee9a theo \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c, ch\u1ed1ng x\u00f3i m\u00f2n.<\/p>\n

– Sau 3 n\u0103m th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n, \u0111\u00e3 tr\u1ed3ng \u0111\u01b0\u1ee3c 10.7ha v\u01b0\u1eddn c\u00e2y \u0103n qu\u1ea3 tr\u00ean \u0111\u1ea5t d\u1ed1c, v\u01b0\u1ee3t k\u1ebf ho\u1ea1ch 0.7ha. C\u00e1c c\u00e2y \u0103n qu\u1ea3 tr\u1ed3ng c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng cao > 90%. M\u1eb7c d\u00f9 tr\u1ed3ng trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft \u1edf \u0111\u1ecba ph\u01b0\u01a1ng kh\u00f4ng \u0111\u01b0\u1ee3c thu\u1eadn l\u1ee3i, nh\u01b0 n\u1eafng h\u1ea1n k\u00e9o d\u00e0i, thi\u1ebfu n\u01b0\u1edbc t\u01b0\u1edbi \u2026 ch\u1ec9 sau 18 th\u00e1ng \u0111\u01b0\u1eddng k\u00ednh D:4.7cm v\u00e0 chi\u1ec1u cao trung b\u00ecnh Htb> 1.5m; nhi\u1ec1u c\u00e2y \u0111\u00e3 b\u1eaft \u0111\u1ea7u cho qu\u1ea3. C\u00e1c lo\u00e0i c\u00e2y v\u1ea3i thi\u1ec1u, h\u1ed3ng kh\u00f4ng h\u1ea1t, \u0111u \u0111\u1ee7 \u0110\u00e0i Loan c\u00f3 nhi\u1ec1u tri\u1ec3n v\u1ecdng t\u1ed1t v\u00e0 m\u1ed9t s\u1ed1 c\u00e2y \u0111\u00e3 b\u1eaft \u0111\u1ea7u ra tr\u00e1i v\u00e0 c\u00f3 thu ho\u1ea1ch.<\/p>\n

2.3. X\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ea5t d\u1ed1c b\u1ec1n v\u1eefng SALT + VAC tr\u00ean \u0111\u1ea5t \u0111\u1ed3i n\u00fai tr\u1ecdc x\u1ea5u \u1edf Nham Bi\u1ec1n.<\/p>\n

– Trong nh\u1eefng n\u0103m 1987 – 1989 c\u00e1c m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ea5t d\u1ed1c b\u1ec1n v\u1eefng SALT1, SALT 2, SALT 3, SALT4 \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u th\u00e0nh c\u00f4ng \u1edf Philippines v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u1edf nhi\u1ec1u n\u01b0\u1edbc \u0110\u00f4ng Nam \u00e1, trong \u0111\u00f3 c\u00f3 Vi\u1ec7t Nam.<\/p>\n

Tuy nhi\u00ean, m\u00f4 h\u00ecnh SALT \u00e1p d\u1ee5ng \u1edf d\u1ef1 \u00e1n \u0111\u00e3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i m\u1ed9t c\u00e1ch s\u00e1ng t\u1ea1o \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean, kinh t\u1ebf x\u00e3 h\u1ed9i \u1edf \u0111\u1ecba ph\u01b0\u01a1ng v\u00f9ng \u0111\u1ed3i n\u00fai tr\u1ecdc Nham Bi\u1ec1n.<\/p>\n

S\u01b0\u1eddn cao v\u00e0 \u0111\u1ec9nh: 70% di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c tr\u1ed3ng r\u1eebng: Th\u00f4ng Caribeae, th\u00f4ng nh\u1ef1a n\u01a1i cao v\u00e0 c\u00f3 \u0111\u1ed9 d\u1ed1c l\u1edbn, tr\u1ed3ng h\u1ed7n lo\u00e0i: Th\u00f4ng + keo l\u00e1 tr\u00e0m ho\u1eb7c keo lai n\u01a1i c\u00f3 \u0111\u1ed9 d\u1ed1c th\u1ea5p.<\/p>\n

– S\u01b0\u1eddn th\u1ea5p v\u00e0 ch\u00e2n: Chi\u1ebfm 30% t\u1ed5ng di\u1ec7n t\u00edch x\u00e2y d\u1ef1ng v\u01b0\u1eddn qu\u1ea3 c\u00e2y th\u00e2n g\u1ed7. C\u00e1c b\u1eadc thang v\u00e0 c\u00e1c \u0111ai b\u0103ng c\u00e2y xanh theo \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c k\u1ebft h\u1ee3p v\u1edbi m\u00f4 h\u00ecnh v\u01b0\u1eddn + ao + chu\u1ed3ng ( V.A.C).<\/p>\n

– C\u00e1c ao nu\u00f4i c\u00e1 \u1edf ch\u00e2n \u0111\u1ed3i ch\u1ee9a n\u01b0\u1edbc t\u1eeb c\u00e1c d\u00f2ng ch\u1ea3y tr\u00ean m\u1eb7t \u0111\u1ea5t d\u1ed1c trong m\u00f9a m\u01b0a v\u00e0 t\u1eeb c\u00e1c d\u00f2ng ch\u1ea3y ki\u1ec7t theo c\u00e1c khe su\u1ed1i ch\u1ea3y t\u1edbi c\u00e1c v\u00f9ng th\u1ea5p trong m\u00f9a kh\u00f4.<\/p>\n

– \u0110\u1eb7c bi\u1ec7t, d\u1ef1 \u00e1n \u0111\u00e3 l\u00e0m b\u1ec3 treo tr\u00ean c\u00e1c s\u01b0\u1eddn \u0111\u1ed3i cao \u0111\u1ec3 ch\u1ee9a n\u01b0\u1edbc t\u1eeb d\u00f2ng ch\u1ea3y tr\u00ean m\u1eb7t trong m\u00f9a m\u01b0a. Bi\u1ec7n ph\u00e1p \u0111\u00f3 c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m gi\u1ea3m b\u1edbt kh\u1ed1i l\u01b0\u1ee3ng n\u01b0\u1edbc ch\u1ea3y tr\u00ean m\u1eb7t \u0111\u1ea5t trong m\u00f9a m\u01b0a v\u00e0 c\u00f3 n\u01b0\u1edbc t\u01b0\u1edbi cho v\u01b0\u1eddn qu\u1ea3 n\u1eb1m \u1edf ph\u00eda d\u01b0\u1edbi, trong nh\u1eefng ng\u00e0y tr\u1eddi n\u1eafng, kh\u00f4ng m\u01b0a. \u0110\u1ebfn m\u00f9a kh\u00f4, b\u1ec3 treo ch\u1ee9a n\u01b0\u1edbc b\u01a1m t\u1eeb ao d\u01b0\u1edbi ch\u00e2n \u0111\u1ed3i \u0111\u1ec3 t\u01b0\u1edbi cho v\u01b0\u1eddn qu\u1ea3 n\u1eb1m \u1edf s\u01b0\u1eddn th\u1ea5p.<\/p>\n

Nh\u01b0 v\u1eady, d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a r\u1eebng ph\u1ee5c h\u1ed3i m\u00f4i tr\u01b0\u1eddng sinh th\u00e1i, h\u1ea1n ch\u1ebf d\u00f2ng ch\u1ea3y, ch\u1ed1ng x\u00f3i m\u00f2n, t\u0103ng d\u00f2ng ch\u1ea3y ki\u1ec7t, t\u0103ng \u0111\u1ed9 \u1ea9m c\u1ee7a \u0111\u1ea5t, k\u1ebft h\u1ee3p v\u1edbi c\u00e1c b\u0103ng c\u00e2y xanh, v\u00e0 c\u00e1c b\u1eadc thang theo \u0111\u01b0\u1eddng \u0111\u1ed3ng m\u1ee9c v\u00e0 ph\u00e2n b\u00f3n cung c\u1ea5p cho c\u00e1c v\u01b0\u1eddn c\u00e2y \u0103n qu\u1ea3, c\u1ed9ng v\u1edbi m\u00f4 h\u00ecnh VAC v\u00e0 b\u1ec3 treo, th\u00ec \u0111\u00e2y l\u00e0 m\u1ed9t m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ea5t d\u1ed1c b\u1ec1n v\u1eefng, c\u00f3 c\u01a1 s\u1edf khoa h\u1ecdc v\u1eefng ch\u1eafc, mang l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf, v\u1edbi m\u1ee9c \u0111\u1ed9 \u0111\u1ea7u t\u01b0 v\u1eeba ph\u1ea3i \u1edf v\u00f9ng \u0111\u1ed3i n\u00fai tr\u1ecdc Vi\u1ec7t Nam, m\u00e0 ch\u00fang ta c\u1ea7n nh\u00e2n r\u1ed9ng ra, sau khi d\u1ef1 \u00e1n k\u1ebft th\u00fac.<\/p>\n

3. K\u1ebft lu\u1eadn, kinh nghi\u1ec7m v\u00e0 ki\u1ebfn ngh\u1ecb.<\/p>\n

3.1. K\u1ebft lu\u1eadn<\/em><\/p>\n

Qua 3 n\u0103m th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n, Trung t\u00e2m Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng – Vi\u1ec7n KHLN Vi\u1ec7t Nam \u0111\u00e3 ph\u1ed1i h\u1ee3p ch\u1eb7t ch\u1ebd v\u1edbi UBND huy\u1ec7n, Ph\u00f2ng N\u00f4ng nghi\u1ec7p huy\u1ec7n, S\u1edf KHCN v\u00e0 M\u00f4i tr\u01b0\u1eddng t\u1ec9nh B\u1eafc Giang, UBND c\u00e1c x\u00e3 n\u01a1i th\u1ef1c hi\u1ec7n D\u1ef1 \u00e1n, c\u00f9ng v\u1edbi s\u1ef1 t\u00edch c\u1ef1c h\u01b0\u1edfng \u1ee9ng c\u1ee7a b\u00e0 con n\u00f4ng d\u00e2n v\u00e0 \u0111\u1ea1t k\u1ebft qu\u1ea3 t\u1ed1t.<\/p>\n

– K\u1ebft qu\u1ea3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u01a1 c\u1ea5u c\u00e2y tr\u1ed3ng l\u00e2m nghi\u1ec7p, c\u00e2y \u0103n qu\u1ea3, c\u00e2y c\u1ea3i t\u1ea1o \u0111\u1ea5t, t\u1ea1o n\u00ean m\u00f4 h\u00ecnh s\u1eed d\u1ee5ng \u0111\u1ea5t d\u1ed1c b\u1ec1n v\u1eefng v\u00e0 c\u00f3 hi\u1ec7u qu\u1ea3.<\/p>\n

– Th\u00f4ng qua t\u1eadp hu\u1ea5n, ng\u01b0\u1eddi n\u00f4ng d\u00e2n \u0111\u01b0\u1ee3c trang b\u1ecb ki\u1ebfn th\u1ee9c khoa h\u1ecdc v\u1ec1 tr\u1ed3ng r\u1eebng, x\u00e2y d\u1ef1ng v\u01b0\u1eddn qu\u1ea3, canh t\u00e1c tr\u00ean \u0111\u1ea5t d\u1ed1c, th\u00e2m canh c\u00e2y tr\u1ed3ng \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 kinh t\u1ebf canh t\u00e1c n\u00f4ng l\u00e2m nghi\u1ec7p tr\u00ean \u0111\u1ea5t d\u1ed1c.<\/p>\n

– N\u00e2ng cao \u0111\u1eddi s\u1ed1ng cho ng\u01b0\u1eddi d\u00e2n, g\u00f3p ph\u1ea7n xo\u00e1 \u0111\u00f3i gi\u1ea3m ngh\u00e8o \u1edf n\u00f4ng th\u00f4n mi\u1ec1n n\u00fai.<\/p>\n

T\u1eeb nh\u1eefng k\u1ebft qu\u1ea3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ee7a d\u1ef1 \u00e1n c\u00e1c c\u1ea5p c\u00f3 tr\u00e1ch nhi\u1ec7m \u0111ang t\u00ecm c\u00e1c gi\u1ea3i ph\u00e1p tri\u1ec3n khai nh\u00e2n r\u1ed9ng m\u00f4 h\u00ecnh c\u1ee7a d\u1ef1 \u00e1n g\u1eafn li\u1ec1n v\u1edbi ch\u01b0\u01a1ng tr\u00ecnh 5 tri\u1ec7u ha r\u1eebng m\u00e0 Ch\u00ednh ph\u1ee7 giao cho t\u1ec9nh B\u1eafc Giang.<\/p>\n

3.2. C\u00e1c kinh nghi\u1ec7m. <\/em><\/p>\n

– C\u1ea7n c\u00f3 s\u1ef1 ph\u1ed1i h\u1ee3p ch\u1eb7t ch\u1ebd gi\u1eefa Trung \u01b0\u01a1ng v\u00e0 \u0111\u1ecba ph\u01b0\u01a1ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi x\u00e3 v\u00e0 huy\u1ec7n.<\/p>\n

– Vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c m\u00f4 h\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 c\u01a1 c\u1ea5u c\u00e2y tr\u1ed3ng ph\u1ea3i d\u1ef1a v\u00e0o c\u00e1c \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean, t\u1eadp qu\u00e1n s\u1ea3n xu\u1ea5t v\u00e0 nguy\u1ec7n v\u1ecdng c\u1ee7a ng\u01b0\u1eddi d\u00e2n \u0111\u1ecba ph\u01b0\u01a1ng, kh\u00f4ng th\u1ec3 \u00e1p \u0111\u1eb7t c\u00e1c m\u00f4 h\u00ecnh \u1edf n\u01a1i kh\u00e1c v\u00e0o v\u00e0 c\u0169ng kh\u00f4ng th\u1ec3 ch\u1ec9 l\u1ea5y c\u00e1c m\u00f4 h\u00ecnh \u0111\u00e3 c\u00f3 \u1edf \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u1ec3 \u00e1p d\u1ee5ng.<\/p>\n

– Vi\u1ec7c ti\u1ebfn h\u00e0nh t\u1eadp hu\u1ea5n k\u1ef9 thu\u1eadt ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi th\u1ef1c thi c\u00e1c h\u1ea1ng m\u1ee5c c\u00f4ng tr\u00ecnh c\u1ee7a d\u1ef1 \u00e1n \u0111\u1ec3 ng\u01b0\u1eddi d\u00e2n bi\u1ebft m\u00ecnh c\u1ea7n ph\u1ea3i l\u00e0m g\u00ec sau khi quy ho\u1ea1ch \u0111\u1ea5t \u0111ai s\u1ea3n xu\u1ea5t cho gia \u0111\u00ecnh h\u1ecd.<\/p>\n

3.3. Ki\u1ebfn ngh\u1ecb. <\/em><\/p>\n

– C\u1ea7n ph\u1ea3i m\u1edf r\u1ed9ng m\u00f4 h\u00ecnh \u1edf Y\u00ean D\u0169ng 70% l\u00e0 tr\u1ed3ng r\u1eebng, 30% di\u1ec7n t\u00edch l\u00e0 x\u00e2y d\u1ef1ng v\u01b0\u1eddn qu\u1ea3, \u0111\u1ec3 trong th\u1eddi gian r\u1eebng tr\u1ed3ng ch\u01b0a \u0111\u01b0\u1ee3c khai th\u00e1c ng\u01b0\u1eddi d\u00e2n v\u1eabn c\u00f3 thu nh\u1eadp th\u01b0\u1eddng xuy\u00ean v\u00e0 l\u1ea5y v\u01b0\u1eddn qu\u1ea3 \u0111\u1ec3 \u0111\u1ea7u t\u01b0 ch\u0103m s\u00f3c r\u1eebng tr\u1ed3ng.<\/p>\n

– Nh\u00e0 n\u01b0\u1edbc c\u1ea7n h\u1ed7 tr\u1ee3 gi\u1ed1ng c\u00e2y t\u1ed1t v\u00e0 k\u1ef9 thu\u1eadt cho ng\u01b0\u1eddi d\u00e2n.<\/p>\n

– X\u00e2y d\u1ef1ng qu\u1ef9 t\u00edn d\u1ee5ng \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u1ec3 cho ng\u01b0\u1eddi d\u00e2n vay v\u1ed1n tr\u1ed3ng r\u1eebng, x\u00e2y d\u1ef1ng v\u01b0\u1eddn qu\u1ea3 trong th\u1eddi gian d\u00e0i 5 – 10 n\u0103m v\u1edbi l\u00e3i xu\u1ea5t th\u1ea5p, ho\u1eb7c kh\u00f4ng l\u1ea5y l\u00e3i.<\/p>\n

C\u1ea7n t\u1ed5 ch\u1ee9c c\u00e1c d\u1ecbch v\u1ee5 cung \u1ee9ng gi\u1ed1ng c\u00e2y con t\u1ed1t v\u00e0 v\u1eadt t\u01b0 cho n\u00f4ng d\u00e2n v\u1edbi gi\u00e1 c\u1ea3 khuy\u1ebfn kh\u00edch v\u00e0 bao ti\u00eau s\u1ea3n ph\u1ea9m cho n\u00f4ng d\u00e2n.<\/p>\n

Summary:<\/em>The project of application of advanced techniques in establishing integrated, efficient land use models on denuded hills and bare land in the NhamBien mountainous region aimed at both restoration of ecological environment and improvement of the people’s income had been carried out from Dec.1997 to Dec. 2000. A preliminary result of the project is successfully establishing models of forest environment restoration on the side and on top of NhamBien mountain with a variety of forest tree species (20ha) such as; Pinus caribaea<\/em>, P. merkusii, Acacia auriculiformis<\/em>, A. hybria, Tephrosia candida<\/em> (Soil cover); and a model of perennial fruit trees (10ha) of high value on sloping land such as Litchisinensis, longan, castard apple, persimmon, graft mango Taiwanese papaya, pine apple. In addition the project has also organized desmonstration courses for technology transfer serving the local people and the nearby communes, suggested an approach concerning advanced techniques application for the project 661 in similar regions.<\/p>\n

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

Tây Nguyên bao g\u1ed3m 4 t\u1ec9nh: Kon Tum, Gia Lai, \u0110\u1eafc L\u1eafc và Lâm \u0110\u1ed3ng v\u1edbi t\u1ed5ng di\u1ec7n tích 57.373 km2 và dân s\u1ed1 4.058.512 ng\u01b0\u1eddi (s\u1ed1 li\u1ec7u n\u0103m 1999). \u0110ây là vùng \u0111\u1ea5t có v\u1ecb trí chi\u1ebfn l\u01b0\u1ee3c h\u1ebft s\u1ee9c quan tr\u1ecdng v\u1ec1 kinh t\u1ebf, chính tr\u1ecb và an ninh qu\u1ed1c phòng \u0111\u1ed1i v\u1edbi c\u1ea3 n\u01b0\u1edbc. Tây Nguyên có \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhiên thu\u1eadn l\u1ee3i v\u1edbi khí h\u1eadu nhi\u1ec7t \u0111\u1edbi n\u1eafng \u1ea5m, m\u01b0a nhi\u1ec1u; di\u1ec7n tích che ph\u1ee7 c\u1ee7a r\u1eebng còn r\u1ea5t l\u1edbn v\u1edbi ngu\u1ed3n tài nguyên sinh h\u1ecdc phong phú. \u0110\u1ea5t \u0111ai Tây Nguyên r\u1ea5t phong phú và còn t\u01b0\u01a1ng \u0111\u1ed1i màu m\u1ee1, \u0111\u1eb7c bi\u1ec7t là qu\u0129 \u0111\u1ea5t Bazan th\u1ec3 hi\u1ec7n ti\u1ec1m n\u0103ng r\u1ea5t l\u1edbn cho phát tri\u1ec3n nông lâm nghi\u1ec7p.<\/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\/8545"}],"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=8545"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8545\/revisions"}],"predecessor-version":[{"id":19351,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8545\/revisions\/19351"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}