{"id":9084,"date":"2009-04-20T08:32:48","date_gmt":"2009-04-20T01:32:48","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/04\/anh-huong-cua-muc-do-che-sang-den-sinh-truong-cua-de-do-giai-doan-vuon-uom\/"},"modified":"2013-10-06T09:01:18","modified_gmt":"2013-10-06T02:01:18","slug":"anh-huong-cua-muc-do-che-sang-den-sinh-truong-cua-de-do-giai-doan-vuon-uom","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/anh-huong-cua-muc-do-che-sang-den-sinh-truong-cua-de-do-giai-doan-vuon-uom\/","title":{"rendered":"\u1ea2nh h\u01b0\u1edfng c\u1ee7a m\u1ee9c \u0111\u1ed9 che s\u00e1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a D\u1ebb \u0111\u1ecf giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m"},"content":{"rendered":"\n

H\u00e0 Th\u1ecb Hi\u1ec1n<\/strong> <\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/em> <\/p>\n

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

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

D\u1ebb \u0111\u1ecf Lithocarpus ducampii<\/em> (H. et A. Camus) A. Camus thu\u1ed9c h\u1ecd D\u1ebb (<\/em>Fagaceae)<\/em> l\u00e0 c\u00e2y g\u1ed7 l\u1edbn c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. Hi\u1ec7n nay, di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean D\u1ebb \u0111\u1ecf c\u00f2n r\u1ea5t \u00edt, nhu c\u1ea7u tr\u1ed3ng r\u1eebng b\u1eb1ng c\u00e2y b\u1ea3n \u0111\u1ecba ng\u00e0y c\u00e0ng t\u0103ng, c\u1ea7n ph\u1ea3i c\u00f3 nh\u1eefng nghi\u00ean c\u1ee9u c\u01a1 b\u1ea3n nh\u1eb1m b\u1ed5 sung ho\u00e0n thi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng. Ch\u00ednh v\u00ec v\u1eady, nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ee9c \u0111\u1ed9 che s\u00e1ng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y D\u1ebb \u0111\u1ecf trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m l\u00e0 th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft. Che s\u00e1ng c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m gi\u1ea3m nhi\u1ec7t \u0111\u1ed9, t\u0103ng \u1ea9m \u0111\u1ed9 kh\u00f4ng kh\u00ed v\u00e0 \u0111\u1ea5t, tu\u1ef3 theo m\u1ee9c \u0111\u1ed9 che s\u00e1ng kh\u00e1c nhau m\u00e0 nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed d\u01b0\u1edbi gi\u00e0n che gi\u1ea3m, \u1ea9m \u0111\u1ed9 kh\u00f4ng kh\u00ed t\u0103ng, nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea5t gi\u1ea3m.M\u1ee9c \u0111\u1ed9 che s\u00e1ng kh\u00e1c nhau c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a D\u1ebb \u0111\u1ecf t\u1eeb 0-1 tu\u1ed5i che 75% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1 th\u00ec t\u1ef7 l\u1ec7 c\u00e2y s\u1ed1ng \u0111\u1ea1t t\u1edbi 100%. D\u1ebb \u0111\u1ecf t\u1eeb 1-2 tu\u1ed5i che 50% \u0111\u1ebfn 75% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1 th\u00ec t\u1ef7 l\u1ec7 c\u00e2y s\u1ed1ng \u0111\u1ea1t 98,89% -100%. M\u1ee9c \u0111\u1ed9 che \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1 kh\u00e1c nhau c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao c\u1ee7a c\u00e2y D\u1ebb \u0111\u1ecf. D\u1ebb \u0111\u1ecf t\u1eeb 0-1 tu\u1ed5i che 75% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1 l\u00e0 t\u1ed1t nh\u1ea5t. D\u1ebb \u0111\u1ecf t\u1eeb 1-2 tu\u1ed5i che 50% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1 l\u00e0 t\u1ed1t nh\u1ea5t. Sinh kh\u1ed1i c\u00e2y D\u1ebb \u0111\u1ecf t\u1eeb 0-1 tu\u1ed5i che 75% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1 th\u00ec h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc t\u00edch l\u0169y trong c\u00e2y l\u00e0 cao nh\u1ea5t. D\u1ebb \u0111\u1ecf t\u1eeb 1-2 tu\u1ed5i che 50% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1 th\u00ec h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc t\u00edch l\u0169y trong c\u00e2y l\u00e0 cao nh\u1ea5t. <\/p>\n

T\u1eeb kh\u00f3a:<\/strong> M\u1ee9c \u0111\u1ed9 che s\u00e1ng, D\u1ebb \u0111\u1ecf <\/p>\n

M\u1ede \u0110\u1ea6U<\/strong> <\/p>\n

D\u1ebb \u0111\u1ecf c\u00f3 t\u00e1c d\u1ee5ng b\u1ea3o v\u1ec7 \u0111\u1ea5t t\u1ed1t do h\u1ec7 r\u1ec5 s\u00e2u r\u1ed9ng, r\u1ec5 r\u1ea5t ph\u00e1t tri\u1ec3n v\u00e0 t\u00e1n l\u00e1 d\u00e0y r\u1eadm, kh\u1ea3 n\u0103ng t\u00e1i sinh h\u1ea1t v\u00e0 ch\u1ed3i m\u1ea1nh, qu\u1ea3 nhi\u1ec1u tinh b\u1ed9t. D\u1ebb \u0111\u1ecf r\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng trong tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng, l\u00e0m gi\u00e0u r\u1eebng, khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh t\u1ef1 nhi\u00ean, D\u1ebb \u0111\u1ecf n\u1eb1m trong danh s\u00e1ch c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba quan tr\u1ecdng trong tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng t\u1ea1i Vi\u1ec7t Nam, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u1ed3ng r\u1eebng ph\u00f2ng h\u1ed9 \u0111\u1ea7u ngu\u1ed3n. D\u1ebb \u0111\u1ecf c\u00f3 bi\u00ean \u0111\u1ed9 ph\u00e2n b\u1ed1 r\u1ea5t r\u1ed9ng, h\u1ea7u h\u1ebft c\u00e1c r\u1eebng nguy\u00ean sinh v\u00e0 th\u1ee9 sinh l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh \u1edf c\u00e1c t\u1ec9nh Tuy\u00ean Quang, Th\u00e1i Nguy\u00ean, L\u1ea1ng S\u01a1n, Qu\u1ea3ng Ninh, B\u1eafc Giang, S\u01a1n La. \u1ede \u0111\u1ed9 cao 100-500m, l\u01b0\u1ee3ng m\u01b0a 1700-2000mm\/n\u0103m, c\u00e1 bi\u1ec7t c\u00f3 nhi\u1ec1u khu Gi\u1ebb \u0111\u1ecf ph\u00e2n b\u1ed1 th\u00e0nh \u0111\u00e1m g\u1ea7n nh\u01b0 thu\u1ea7n lo\u00e0i (Th\u00e1i Nguy\u00ean, S\u01a1n La). Khi c\u00e2y c\u00f2n non \u01b0a b\u00f3ng, sau l\u1edbn \u01b0a s\u00e1ng d\u1ea7n nh\u01b0ng v\u1eabn ch\u1ecbu \u0111\u01b0\u1ee3c b\u00f3ng, c\u00f3 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1eebng r\u1ea5t nhanh, s\u1ed1 l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh 2 v\u1ea1n c\u00e2y\/ha, sau 3-4 n\u0103m ph\u1ee5c h\u1ed3i, r\u1eebng kh\u00e9p t\u00e1n v\u1edbi \u0111\u1ed9 t\u00e0n che tr\u00ean 0,6. <\/p>\n

C\u1eadp nh\u1eadt t\u1ea1i \u0111\u00e2y<\/a><\/strong> <\/p>\n","protected":false},"excerpt":{"rendered":"

\n \n<\/p>\n

\nD\u1ebb \u0111\u1ecf Lithocarpus ducampii<\/em> (H. et A. Camus) A. Camus thu\u1ed9c h\u1ecd D\u1ebb (<\/em>Fagaceae)<\/em> là cây g\u1ed7 l\u1edbn có giá tr\u1ecb kinh t\u1ebf cao. Hi\u1ec7n nay, di\u1ec7n tích r\u1eebng t\u1ef1 nhiên D\u1ebb \u0111\u1ecf còn r\u1ea5t ít, nhu c\u1ea7u tr\u1ed3ng r\u1eebng b\u1eb1ng cây b\u1ea3n \u0111\u1ecba ngày càng t\u0103ng, c\u1ea7n ph\u1ea3i có nh\u1eefng nghiên c\u1ee9u c\u01a1 b\u1ea3n nh\u1eb1m b\u1ed5 sung hoàn thi\u1ec7n các bi\u1ec7n pháp k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng. Chính vì v\u1eady, nghiên c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ee9c \u0111\u1ed9 che sáng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a cây D\u1ebb \u0111\u1ecf trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m là th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft. Che sáng có tác d\u1ee5ng làm gi\u1ea3m nhi\u1ec7t \u0111\u1ed9, t\u0103ng \u1ea9m \u0111\u1ed9 không khí và \u0111\u1ea5t, tu\u1ef3 theo m\u1ee9c \u0111\u1ed9 che sáng khác nhau mà nhi\u1ec7t \u0111\u1ed9 không khí d\u01b0\u1edbi giàn che gi\u1ea3m, \u1ea9m \u0111\u1ed9 không khí t\u0103ng, nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea5t gi\u1ea3m. <\/strong>M\u1ee9c \u0111\u1ed9 che sáng khác nhau có \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a D\u1ebb \u0111\u1ecf t\u1eeb 0-1 tu\u1ed5i che 75% ánh sáng tr\u1ef1c x\u1ea1 thì t\u1ef7 l\u1ec7 cây s\u1ed1ng \u0111\u1ea1t t\u1edbi 100%. D\u1ebb \u0111\u1ecf t\u1eeb 1-2 tu\u1ed5i che 50% \u0111\u1ebfn 75% ánh sáng tr\u1ef1c x\u1ea1 thì t\u1ef7 l\u1ec7 cây s\u1ed1ng \u0111\u1ea1t 98,89% -100%. M\u1ee9c \u0111\u1ed9 che ánh sáng tr\u1ef1c x\u1ea1 khác nhau có \u1ea3nh h\u01b0\u1edfng rõ r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng kính, chi\u1ec1u cao c\u1ee7a cây D\u1ebb \u0111\u1ecf. D\u1ebb \u0111\u1ecf t\u1eeb 0-1 tu\u1ed5i che 75% ánh sáng tr\u1ef1c x\u1ea1 là t\u1ed1t nh\u1ea5t. D\u1ebb \u0111\u1ecf t\u1eeb 1-2 tu\u1ed5i che 50% ánh sáng tr\u1ef1c x\u1ea1 là t\u1ed1t nh\u1ea5t. Sinh kh\u1ed1i cây D\u1ebb \u0111\u1ecf t\u1eeb 0-1 tu\u1ed5i che 75% ánh sáng tr\u1ef1c x\u1ea1 thì hàm l\u01b0\u1ee3ng n\u01b0\u1edbc tích l\u0169y trong cây là cao nh\u1ea5t. D\u1ebb \u0111\u1ecf t\u1eeb 1-2 tu\u1ed5i che 50% ánh sáng tr\u1ef1c x\u1ea1 thì hàm l\u01b0\u1ee3ng n\u01b0\u1edbc tích l\u0169y trong cây là cao nh\u1ea5t. <\/span><\/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\/9084"}],"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=9084"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9084\/revisions"}],"predecessor-version":[{"id":10538,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9084\/revisions\/10538"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}