{"id":9602,"date":"2011-06-15T03:49:36","date_gmt":"2011-06-14T20:49:36","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2011\/06\/ket-qua-nghien-cuu-khoanh-nuoi-xuc-tien-tai-sinh-rung-tu-nhien-co-voi-thuoc-schima-wallichii-choisy-tai-sinh-tai-huyen-luc-ngan-tinh-bac-giang\/"},"modified":"2013-10-06T09:02:20","modified_gmt":"2013-10-06T02:02:20","slug":"ket-qua-nghien-cuu-khoanh-nuoi-xuc-tien-tai-sinh-rung-tu-nhien-co-voi-thuoc-schima-wallichii-choisy-tai-sinh-tai-huyen-luc-ngan-tinh-bac-giang","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-nghien-cuu-khoanh-nuoi-xuc-tien-tai-sinh-rung-tu-nhien-co-voi-thuoc-schima-wallichii-choisy-tai-sinh-tai-huyen-luc-ngan-tinh-bac-giang\/","title":{"rendered":"K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh r\u1eebng t\u1ef1 nhi\u00ean c\u00f3 V\u1ed1i thu\u1ed1c (Schima wallichii Choisy) t\u00e1i sinh t\u1ea1i huy\u1ec7n L\u1ee5c Ng\u1ea1n, t\u1ec9nh B\u1eafc Giang"},"content":{"rendered":"<\/p>\n

V\u00f5 \u0110\u1ea1i H\u1ea3i<\/strong> <\/p>\n

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

T\u00d3M T\u1eaeT<\/strong> <\/p>\n

V\u1ed1i thu\u1ed1c (Schima wallichii <\/em>Choisy) l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, ph\u00e2n b\u1ed1 r\u1ed9ng v\u00e0 \u0111a t\u00e1c d\u1ee5ng, \u0111\u1eb7c bi\u1ec7t V\u1ed1i thu\u1ed1c c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ef1 nhi\u00ean ch\u1ed3i v\u00e0 h\u1ea1t r\u1ea5t m\u1ea1nh. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i khu v\u1ef1c r\u1eebng t\u1ef1 nhi\u00ean c\u00f3 V\u1ed1i thu\u1ed1c t\u00e1i sinh tr\u00ean \u0111\u1ecba b\u00e0n huy\u1ec7n L\u1ee5c Ng\u1ea1n, t\u1ec9nh B\u1eafc giang. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5ysau th\u1eddi gian khoanh nu\u00f4i 6 n\u0103m v\u00e0 12 n\u0103m th\u00ec \u0111\u1ec1u c\u00f3 s\u1ef1 chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i t\u1eeb Ic l\u00ean tr\u1ea1ng th\u00e1i IIa, s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i xu\u1ea5t hi\u1ec7n c\u0169ng c\u00f3 s\u1ef1 gia t\u0103ng t\u1eeb 8 – 10 lo\u00e0i (tr\u01b0\u1edbc khoanh nu\u00f4i) l\u00ean 10 – 12 lo\u00e0i (sau khoanh nu\u00f4i), \u0111\u1ed9 t\u00e0n che t\u0103ng t\u1eeb 0,68 l\u00ean 0,82, m\u1eadt \u0111\u1ed9 V\u1ed1i thu\u1ed1c t\u00e1i sinh t\u0103ng 16,32% sau 6 n\u0103m khoanh nu\u00f4i,\u2026 \u0110\u1ed1i v\u1edbi tr\u1ea1ng th\u00e1i IIb sau khoanh nu\u00f4i 10 n\u0103m s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i c\u0169ng t\u0103ng t\u1eeb 8 – 10 lo\u00e0i (tr\u01b0\u1edbc khoanh nu\u00f4i) l\u00ean 10 – 13 lo\u00e0i (sau khoanh nu\u00f4i) trong \u0111\u00f3 V\u1ed1i thu\u1ed1c ti\u1ebfp t\u1ee5c gi\u1eef v\u1ecb tr\u00ed quan tr\u1ecdng trong c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh c\u1ee7a r\u1eebng, m\u1eadt \u0111\u1ed9 V\u1ed1i thu\u1ed1c t\u00e1i sinh t\u0103ng trung b\u00ecnh kho\u1ea3ng 600 c\u00e2y\/ha, \u0111\u1ed9 t\u00e0n che c\u1ee7a r\u1eebng t\u0103ng t\u1eeb 0,65 l\u00ean 0,8,\u2026 \u0110\u1ec3 th\u1ef1c hi\u1ec7n khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh t\u1ef1 nhi\u00ean r\u1eebng c\u00f3 V\u1ed1i thu\u1ed1c t\u00e1i sinh, t\u00f9y v\u00e0o t\u1eebng \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 c\u1ee7a \u0111\u1ecba ph\u01b0\u01a1ng m\u00e0 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n bi\u1ec7n ph\u00e1p khoanh \u0111\u00f3ng ho\u1eb7c khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh t\u1ef1 nhi\u00ean, b\u00ean c\u1ea1nh \u0111\u00f3 c\u1ea7n l\u00e0m t\u1ed1t c\u00f4ng t\u00e1c giao kho\u00e1n b\u1ea3o v\u1ec7 r\u1eebng t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng. <\/p>\n

T\u1eeb kh\u00f3a:<\/strong> V\u1ed1i thu\u1ed1c, khoanh nu\u00f4i, x\u00fac ti\u1ebfn t\u00e1i sinh, L\u1ee5c Ng\u1ea1n – B\u1eafc Giang, Tr\u1ea1ng th\u00e1i Ic, IIb. <\/p>\n

I.<\/strong> \u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/strong> <\/p>\n

V\u1ed1i thu\u1ed1c l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba, ph\u00e2n b\u1ed1 r\u1ed9ng, \u0111a t\u00e1c d\u1ee5ng. G\u1ed7 V\u1ed1i thu\u1ed1c n\u1eb7ng v\u00e0 b\u1ec1n ch\u1eafc, kh\u00f4ng cong v\u00eanh m\u1ed1i m\u1ecdt, l\u00f5i v\u00e0 gi\u00e1c \u0111\u1ec1u c\u00f3 m\u00e0u n\u00e2u r\u1ea5t \u0111\u1eb9p \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m c\u1ed9t nh\u00e0, \u0111\u1ed3 gia d\u1ee5ng; v\u1ecf, l\u00e1 v\u00e0 r\u1ec5 c\u00e2y \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m thu\u1ed1c ch\u1eefa b\u1ec7nh v\u00e0 s\u1ea3n xu\u1ea5t c\u00e1c ch\u1ebf ph\u1ea9m c\u00f4ng nghi\u1ec7p. Hi\u1ec7n nay, vi\u1ec7c tr\u1ed3ng r\u1eebng V\u1ed1i thu\u1ed1c \u0111ang \u0111\u01b0\u1ee3c quan t\u00e2m. Tuy nhi\u00ean, kinh nghi\u1ec7m th\u1ef1c ti\u1ec5n cho th\u1ea5y k\u1ef9 thu\u1eadt tr\u1ed3ng V\u1ed1i thu\u1ed1c kh\u00e1 ph\u1ee9c t\u1ea1p do m\u1ea5y n\u0103m \u0111\u1ea7u ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 che b\u00f3ng ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u sinh th\u00e1i c\u1ee7a c\u00e2y, t\u1ef7 l\u1ec7 s\u1ed1ng r\u1eebng tr\u1ed3ng V\u1ed1i thu\u1ed1c kh\u00f4ng cao, trung b\u00ecnh ch\u1ec9 \u0111\u1ea1t kho\u1ea3ng 60%, sinh tr\u01b0\u1edfng nh\u1eefng n\u0103m \u0111\u1ea7u r\u1ea5t ch\u1eadm. Trong h\u01a1n 10 n\u0103m qua, \u1edf L\u1ee5c Ng\u1ea1n – B\u1eafc Giang v\u00e0 m\u1ed9t s\u1ed1 \u0111\u1ecba ph\u01b0\u01a1ng kh\u00e1c \u0111\u00e3 th\u1ef1c hi\u1ec7n bi\u1ec7n ph\u00e1p khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh (KNXTTS) t\u1ef1 nhi\u00ean r\u1eebng V\u1ed1i thu\u1ed1c kh\u00e1 th\u00e0nh c\u00f4ng. \u0110\u00e2y l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p ph\u1ee5c h\u1ed3i r\u1eebng \u0111\u01a1n gi\u1ea3n, r\u1ebb ti\u1ec1n, hi\u1ec7u qu\u1ea3 kinh t\u1ebf v\u00e0 m\u00f4i tr\u01b0\u1eddng cao n\u00ean r\u1ea5t c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1, t\u1ed5ng k\u1ebft kinh nghi\u1ec7m \u0111\u1ec3 ph\u00e1t tri\u1ec3n m\u1edf r\u1ed9ng. <\/p>\n

(K\u1ef7 y\u1ebfu H\u1ed9i ngh\u1ecb Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 L\u00e2m nghi\u1ec7p v\u1edbi ph\u00e1t tri\u1ec3n r\u1eebng b\u1ec1n v\u1eefng v\u00e0 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, trang 232-240)<\/em> <\/p>\n","protected":false},"excerpt":{"rendered":"

\nV\u1ed1i thu\u1ed1c (Schima wallichii <\/em>Choisy) là loài cây g\u1ed7 l\u1edbn, phân b\u1ed1 r\u1ed9ng và \u0111a tác d\u1ee5ng, \u0111\u1eb7c bi\u1ec7t V\u1ed1i thu\u1ed1c có kh\u1ea3 n\u0103ng tái sinh t\u1ef1 nhiên ch\u1ed3i và h\u1ea1t r\u1ea5t m\u1ea1nh. Nghiên c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i khu v\u1ef1c r\u1eebng t\u1ef1 nhiên có V\u1ed1i thu\u1ed1c tái sinh trên \u0111\u1ecba bàn huy\u1ec7n L\u1ee5c Ng\u1ea1n, t\u1ec9nh B\u1eafc giang. K\u1ebft qu\u1ea3 nghiên c\u1ee9u cho th\u1ea5y <\/span>sau th\u1eddi gian khoanh nuôi 6 n\u0103m và 12 n\u0103m thì \u0111\u1ec1u có s\u1ef1 chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng thái t\u1eeb Ic lên tr\u1ea1ng thái IIa, s\u1ed1 l\u01b0\u1ee3ng loài xu\u1ea5t hi\u1ec7n c\u0169ng có s\u1ef1 gia t\u0103ng t\u1eeb 8 – 10 loài (tr\u01b0\u1edbc khoanh nuôi) lên 10 – 12 loài (sau khoanh nuôi), \u0111\u1ed9 tàn che t\u0103ng t\u1eeb 0,68 lên 0,82, m\u1eadt \u0111\u1ed9 V\u1ed1i thu\u1ed1c tái sinh t\u0103ng 16,32% sau 6 n\u0103m khoanh nuôi,…<\/span><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9602"}],"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=9602"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9602\/revisions"}],"predecessor-version":[{"id":11056,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9602\/revisions\/11056"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}