{"id":9608,"date":"2011-06-15T04:11:46","date_gmt":"2011-06-14T21:11:46","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2011\/06\/nghien-cuu-mot-so-bien-phap-ky-thuat-trong-xa-cu-la-nho-swietenia-microphylla-cho-nang-suat-cao-nham-cung-cap-go-lon-trong-vung-dong-nam-bo\/"},"modified":"2013-10-06T09:02:20","modified_gmt":"2013-10-06T02:02:20","slug":"nghien-cuu-mot-so-bien-phap-ky-thuat-trong-xa-cu-la-nho-swietenia-microphylla-cho-nang-suat-cao-nham-cung-cap-go-lon-trong-vung-dong-nam-bo","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-mot-so-bien-phap-ky-thuat-trong-xa-cu-la-nho-swietenia-microphylla-cho-nang-suat-cao-nham-cung-cap-go-lon-trong-vung-dong-nam-bo\/","title":{"rendered":"Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng X\u00e0 c\u1eeb l\u00e1 nh\u1ecf (Swietenia microphylla) cho n\u0103ng su\u1ea5t cao nh\u1eb1m cung c\u1ea5p g\u1ed7 l\u1edbn trong v\u00f9ng \u0110\u00f4ng Nam b\u1ed9"},"content":{"rendered":"

Tr\u1ea7n V\u0103n S\u00e2m<\/strong>Trung t\u00e2m KHSXLN \u0110\u00f4ng Nam B\u1ed9<\/em>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam <\/p>\n

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

M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u l\u00e0 x\u00e1c \u0111\u1ecbnh k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng X\u00e0 c\u1eeb l\u00e1 nh\u1ecf \u0111\u1ec3 cung c\u1ea5p g\u1ed7 l\u1edbn \u1edf v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i hai \u0111\u1ecba \u0111i\u1ec3m: B\u1ea7u B\u00e0ng – B\u00ecnh D\u01b0\u01a1ng v\u00e0 H\u00e0m Minh – B\u00ecnh Thu\u1eadn. K\u1ebft qu\u1ea3 cho th\u1ea5y c\u00e2y X\u00e0 c\u1eeb l\u00e0 nh\u1ecf 40 th\u00e1ng tu\u1ed5i \u1edf B\u1ea7u B\u00e0ng sinh tr\u01b0\u1edfng t\u1ed1t v\u00e0 c\u00f3 s\u1ef1 kh\u00e1c nhau gi\u1eefa c\u00e1c nghi\u1ec7m th\u1ee9c b\u00f3n ph\u00e2n. Ri\u00eang th\u00ed nghi\u1ec7m v\u1ec1 m\u1eadt \u0111\u1ed9 c\u00e2y tr\u1ed3ng th\u00ec sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh l\u1eabn chi\u1ec1u cao \u1edf c\u00e1c nghi\u1ec7m th\u1ee9c m\u1eadt \u0111\u1ed9 tr\u1ed3ng t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u nhau. Tr\u1ed3ng xen c\u00e2y \u0110\u1eadu tr\u00e0m c\u00e1ch h\u00e0ng c\u00e2y X\u00e0 c\u1eeb t\u1eeb 1.0 – 1.5m th\u00ec c\u00e2y X\u00e0 c\u1eeb c\u1eeb sinh tr\u01b0\u1edfng r\u1ea5t kh\u1ea3 quan. Th\u00ed nghi\u1ec7m x\u00e1c \u0111\u1ecbnh tu\u1ed5i X\u00e0 c\u1eeb l\u00e1 nh\u1ecf \u0111em \u0111i tr\u1ed3ng r\u1eebng cho th\u1ea5y c\u00e2y 1 n\u0103m tu\u1ed5i cho t\u1ec9 l\u1ec7 s\u1ed1ng cao v\u00e0 sinh tr\u01b0\u1edfng t\u1ed1t . <\/p>\n

T\u1eeb kh\u00f3a: <\/strong>X\u00e0 c\u1eeb l\u00e1 nh\u1ecf, cung c\u1ea5p g\u1ed7 l\u1edbn<\/strong> <\/p>\n

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

\u1ede n\u01b0\u1edbc ta, theo s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra c\u00e2y X\u00e0 c\u1eeb n\u00f3i chung (X\u00e0 c\u1eeb l\u00e1 l\u1edbn v\u00e0 X\u00e0 c\u1eeb l\u00e1 nh\u1ecf) \u0111\u01b0\u1ee3c nh\u1eadp v\u00e0 tr\u1ed3ng v\u00e0o nh\u1eefng n\u0103m \u0111\u1ea7u c\u1ee7a th\u1ebf k\u1ef9 XX. Ch\u1ee7 y\u1ebfu tr\u1ed3ng tr\u00ean c\u00e1c \u0111\u01b0\u1eddng ph\u1ed1 v\u00e0 v\u01b0\u1eddn b\u00e1ch th\u1ea3o \u0111\u1ec3 l\u00e0m b\u00f3ng m\u00e1t, trong \u0111\u00f3 c\u00f2n l\u1ea1i cho t\u1edbi ng\u00e0y nay c\u00f3 m\u1ed9t s\u1ed1 c\u00e2y X\u00e0 c\u1eeb l\u00e1 nh\u1ecf (Swietenia microphylla) <\/em>thu\u1ed9ch\u1ecd Xoan (Meliaceae) \u1edf Th\u1ea3o c\u1ea7m vi\u00ean S\u00e0i G\u00f2n, v\u01b0\u1eddn th\u1ef1c v\u1eadt Tr\u1ea3ng Bom v\u1edbi s\u1ed1 l\u01b0\u1ee3ng c\u00f2n khi\u00eam t\u1ed1n (6 c\u00e2y). C\u00e1c c\u00e2y n\u00e0y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c t\u1eeb 60 \u2013 100cm, chi\u1ec1u cao t\u1eeb30 \u2013 35m, th\u00e2n th\u1eb3ng, tr\u00f2n v\u00e0 ph\u00e2n c\u00e0nh cao tr\u00ean 15m n\u00ean c\u00f3 gi\u00e1 tr\u1ecb v\u1ec1 m\u1eb7t s\u1eed d\u1ee5ng. \u0110\u1eb7c bi\u1ec7t t\u00e1i sinh h\u1ea1t d\u01b0\u1edbi t\u00e1n r\u1eebng kh\u00e1 nhi\u1ec1u do \u0111\u00f3 gi\u00fap cho vi\u1ec7c tr\u1ed3ng r\u1eebng ph\u1ee7 xanh \u0111\u1ea5t tr\u1ed1ng \u0111\u1ed3i n\u00fai tr\u1ecdc \u0111\u01b0\u1ee3c nhanh ch\u00f3ng.T\u1eeb sau khi ngu\u1ed3n t\u00e0i nguy\u00ean r\u1eebng t\u1ef1 nhi\u00ean b\u1ecb c\u1ea1n ki\u1ec7t cho n\u00ean vi\u1ec7c nh\u1eadp kh\u1ea9u g\u1ed7 \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng, \u0111\u1ed3ng th\u1eddi g\u1ed7 r\u1eebng tr\u1ed3ng \u0111\u01b0\u1ee3c thay th\u1ebf v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb cao, trong \u0111\u00f3 c\u00f3 g\u1ed7 c\u00e2y X\u00e0 c\u1eeb. Theo th\u00f4ng tin t\u1eeb c\u00e1c nh\u00e0 m\u00e1y ch\u1ebf bi\u1ebfn g\u1ed7 t\u1ea1i khu H\u1ed1 Nai thu\u1ed9c t\u1ec9nh \u0110\u1ed3ng Nai th\u00ec gi\u00e1 g\u1ed7 s\u00fac c\u1ee7a c\u00e2y X\u00e0 c\u1eeb c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 50cm tr\u1edf l\u00ean c\u00f3 g\u00eda mua t\u1eeb5 – 8 tri\u1ec7u \u0111\u1ed3ng cho m\u1ed9t m\u00e9t kh\u1ed1i. Ngo\u00e0ira, c\u00e2y X\u00e0 c\u1eeb \u0111\u00e3 tr\u1ed3ng th\u00e0nh c\u00f4ng tr\u00ean nhi\u1ec1u \u0111\u1ecba ph\u01b0\u01a1ng trong v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. Qua s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra s\u01a1 b\u1ed9 c\u1ee7a Trung t\u00e2m t\u1ea1i r\u1eebng X\u00e0 c\u1eeb 5 tu\u1ed5i \u1edf La Ng\u00e0 – t\u1ec9nh \u0110\u1ed3ng Nai c\u00f3 \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh l\u00e0 17,02cm v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n 7,93m, t\u1ea1i r\u1eebng X\u00e0 c\u1eeb 3 tu\u1ed5i \u1edf L\u00e2m tr\u01b0\u1eddng Ph\u00fa B\u00ecnh \u2013 t\u1ec9nh B\u00ecnh D\u01b0\u01a1ng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n 10,04cm v\u00e0 chi\u1ec1u cao l\u00e0 7,08m v\u00e0 c\u00e2y c\u00f3 s\u1ee9c s\u1ed1ng r\u1ea5t t\u1ed1t. Nh\u01b0 v\u1eady, so v\u1edbi c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn m\u1ecdc nhanh nh\u01b0 c\u00e2y T\u1ebfch th\u00ec lo\u00e0i c\u00e2y n\u00e0y c\u00f3 nhi\u1ec1u tri\u1ec3n v\u1ecdng h\u01a1n nh\u01b0: tr\u1ed3ng t\u1ef7 l\u1ec7 s\u1ed1ng cao (th\u01b0\u1eddng t\u1ef7 l\u1ec7 s\u1ed1ng 90%), m\u1ecdc nhanh, tr\u1ed3ng \u0111\u01b0\u1ee3c tr\u00ean nhi\u1ec1u l\u1eadp \u0111\u1ecba kh\u00e1c nhau v\u00e0 \u00edt k\u00e9m ch\u1ecdn d\u1ea1ng \u0111\u1ea5t. V\u00ec v\u1eady, v\u00e0o n\u0103m 1997 cho t\u1edbi nay phong tr\u00e0o tr\u1ed3ng X\u00e0 c\u1eeb \u0111\u01b0\u1ee3c kh\u01a1i d\u1eady m\u1ea1nh m\u1ebd \u1edf v\u00f9ng \u0110\u00f4ng Nam B\u1ed9, theo s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra c\u00f3 kho\u1ea3ng 3.061ha r\u1eebng tr\u1ed3ng c\u00e2y X\u00e0 c\u1eeb \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf c\u00e1c L\u00e2m tr\u01b0\u1eddng Qu\u1ed1c d\u00e2n, c\u00e1c n\u00f4ng trang ho\u1eb7c nh\u1eefng khu \u0111\u1ea5t m\u00e0 n\u00f4ng d\u00e2n nh\u1eadn kho\u00e1n c\u1ee7a Nh\u00e0 n\u01b0\u1edbc, trong \u0111\u00f3 tr\u1ed3ng thu\u1ea7n lo\u1ea1i l\u00e0 1.241ha, tr\u1ed3ng xen canh v\u1edbi lo\u00e0i c\u00e2y kh\u00e1c nh\u01b0: \u0110i\u1ec1u, C\u00e0 ph\u00ea, Xo\u00e0i, Keo\u2026 l\u00e0 1.822ha. Th\u00eam v\u00e0o \u0111\u00f3 c\u00f3 h\u00e0ng tri\u1ec7u c\u00e2y tr\u1ed3ng ph\u00e2n t\u00e1n trong v\u01b0\u1eddn, b\u1edd ao, \u0111\u01b0\u1eddng ph\u1ed1,\u2026. R\u1eebng X\u00e0 c\u1eeb \u0111\u01b0\u1ee3c tr\u1ed3ng nhi\u1ec1u nh\u1ea5t \u1edf t\u1ec9nh B\u00ecnh Ph\u01b0\u1edbc (1.852ha), B\u00ecnh D\u01b0\u01a1ng (846ha), T\u00e2y Ninh (184ha), \u0110\u1ed3ng Nai (103ha). Trong s\u1ed1 di\u1ec7n t\u00edch tr\u1ed3ng n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 tr\u1ed3ng X\u00e0 c\u1eeb l\u00e1 l\u1edbn v\u00e0 c\u00f3 \u00edt di\u1ec7n t\u00edch tr\u1ed3ng X\u00e0 c\u1eeb l\u00e1 nh\u1ecf \u0111\u01b0\u1ee3c tr\u1ed3ng xen l\u1eabn ho\u1eb7c tr\u1ed3ng thu\u1ea7n lo\u1ea1i. Tuy tr\u1ed3ng r\u1eebng X\u00e0 c\u1eeb l\u00e1 l\u1edbn r\u1ea5t nhi\u1ec1u v\u1ec1 di\u1ec7n t\u00edch \u1edf v\u00f9ng \u0110\u00f4ng Nam b\u1ed9 nh\u01b0ng b\u01b0\u1edbc \u0111\u1ea7u \u0111\u00e3 th\u1ec3 hi\u1ec7n nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a ch\u00fang l\u00e0 ph\u00e2n c\u00e0nh th\u1ea5p, c\u00e2y cao kho\u1ea3ng 5 \u20137m l\u00e0 \u0111\u00e3 ph\u00e2n c\u00e0nh n\u00ean gi\u00e1 tr\u1ecb kh\u00fac th\u00e2n d\u01b0\u1edbi c\u00e0nh kh\u00f4ng l\u1edbn. <\/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 257-265)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

\nM\u1ee5c tiêu c\u1ee7a nghiên c\u1ee9u là xác \u0111\u1ecbnh k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng Xà c\u1eeb lá nh\u1ecf \u0111\u1ec3 cung c\u1ea5p g\u1ed7 l\u1edbn \u1edf vùng \u0110ông Nam B\u1ed9. Nghiên c\u1ee9u \u0111\u01b0\u1ee3c ti\u1ebfn hành t\u1ea1i hai \u0111\u1ecba \u0111i\u1ec3m: B\u1ea7u Bàng – Bình D\u01b0\u01a1ng và Hàm Minh – Bình Thu\u1eadn. K\u1ebft qu\u1ea3 cho th\u1ea5y cây Xà c\u1eeb là nh\u1ecf 40 tháng tu\u1ed5i \u1edf B\u1ea7u Bàng sinh tr\u01b0\u1edfng t\u1ed1t và có s\u1ef1 khác nhau gi\u1eefa các nghi\u1ec7m th\u1ee9c bón phân. Riêng thí nghi\u1ec7m v\u1ec1 m\u1eadt \u0111\u1ed9 cây tr\u1ed3ng thì sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng kính l\u1eabn chi\u1ec1u cao \u1edf các nghi\u1ec7m th\u1ee9c m\u1eadt \u0111\u1ed9 tr\u1ed3ng t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u nhau. <\/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\/9608"}],"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=9608"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9608\/revisions"}],"predecessor-version":[{"id":11062,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9608\/revisions\/11062"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}