{"id":1535,"date":"2012-02-17T02:18:35","date_gmt":"2012-02-17T02:18:35","guid":{"rendered":"http:\/\/vafs.dungnq.local\/2012\/02\/17\/nghien-cuu-mot-so-co-so-khoa-hoc-va-bien-phap-ky-thuat-gay-trong-cay-cho-chi-tai-vung-phong-ho-dau-nguon-song-da\/"},"modified":"2013-10-06T09:02:36","modified_gmt":"2013-10-06T02:02:36","slug":"nghien-cuu-mot-so-co-so-khoa-hoc-va-bien-phap-ky-thuat-gay-trong-cay-cho-chi-tai-vung-phong-ho-dau-nguon-song-da","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-mot-so-co-so-khoa-hoc-va-bien-phap-ky-thuat-gay-trong-cay-cho-chi-tai-vung-phong-ho-dau-nguon-song-da\/","title":{"rendered":"Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 c\u01a1 s\u1edf khoa h\u1ecdc v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng c\u00e2y Ch\u00f2 ch\u1ec9 t\u1ea1i v\u00f9ng ph\u00f2ng h\u1ed9 \u0111\u1ea7u ngu\u1ed3n s\u00f4ng \u0110\u00e0"},"content":{"rendered":"<p> <strong>\u0110o\u00e0n \u0110\u00ecnh Tam<\/strong> <\/p>\n<p> <em>Trung t\u00e2m NC Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng<\/em> <\/p>\n<p> <strong>T\u00d3M T\u1eaeT<\/strong> <\/p>\n<p> Ch\u00f2 ch\u1ec9 l\u00e0 lo\u00e0i ph\u00e2n b\u1ed1 h\u1eb9p, th\u01b0\u1eddng m\u1ecdc \u1edf n\u01a1i c\u00f3 \u0111\u1ed9 cao d\u01b0\u1edbi 700m, n\u01a1i c\u00f3 th\u00e0nh ph\u1ea7n c\u01a1 gi\u1edbi t\u1eeb th\u1ecbt trung b\u00ecnh \u0111\u1ebfn s\u00e9t n\u1eb7ng, \u0111\u1ea5t c\u00f3 ph\u1ea3n \u1ee9ng h\u01a1i chua (<5). C\u00e1c l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra c\u00f3 864 - 943 c\u00e1 th\u1ec3 c\u1ee7a 49 - 59 lo\u00e0i, trong \u0111\u00f3 Ch\u00f2 ch\u1ec9 chi\u1ebfm 2,6% \u2013 4,5%, \u0111\u1ea1t 3,2% t\u1ed5ng G; 3,2 - 5,5% t\u1ed5ng V. L\u00e0 lo\u00e0i c\u00f3 s\u1ed1 c\u00e1 th\u1ec3 t\u00e1i sinh th\u1ea5p (chi\u1ebfm 2,5% \u2013 2,7%). B\u00f3n N theo c\u00f4ng th\u1ee9c 10 (0,29g NH<sub>4<\/sub>NO\u00ad<sub>3 <\/sub>+ 0,43g NaH<sub>2<\/sub>PO<sub>4<\/sub>.2H<sub>2<\/sub>O + 0,08g KCl \/b\u1ea7u); b\u00f3n P theo c\u00f4ng th\u1ee9c 5 (0,29g NH<sub>4<\/sub>NO<sub>3<\/sub> + 0,87g NaH<sub>2<\/sub>PO<sub>4<\/sub>.2H<sub>2<\/sub>O + 0,08g KCl\/b\u1ea7u)); b\u00f3n K theo c\u00f4ng th\u1ee9c 9 (0,29g NH<sub>4<\/sub>NO<sub>3<\/sub> + 0,43g NaH<sub>2<\/sub>PO<sub>4<\/sub>.2H<sub>2<\/sub>O + 0,23g KCl\/b\u1ea7u) cho sinh tr\u01b0\u1edfng v\u00e0 t\u1ed1c \u0111\u1ed9 sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i cao nh\u1ea5t. \u1ede giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m c\u00e2y th\u00edch h\u1ee3p nh\u1ea5t v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 chi\u1ebfu s\u00e1ng l\u00e0 50%, c\u00e1c ch\u1ec9 ti\u00eau n\u00e0y gi\u1ea3m d\u1ea7n khi \u0111\u1ed9 chi\u1ebfu s\u00e1ng \u1edf c\u00e1c m\u1ee9c 75%, 25% v\u00e0 100%. Sau 4 th\u00e1ng, c\u00e2y Ch\u00f2 ch\u1ec9 \u0111\u00e3 c\u00f3 bi\u1ec3u hi\u1ec7n tr\u1ea1ng th\u00e1i h\u00e9o kh\u00f4ng ph\u1ee5c h\u1ed3i \u0111\u01b0\u1ee3c \u1edf \u0111\u1ed9 \u1ea9m 5,11%. C\u00e2y con c\u00f3 bi\u1ec3u hi\u1ec7n r\u00f5 r\u1ec7t v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 h\u00ecnh th\u00e1i khi thi\u1ebfu 1 trong 3 nguy\u00ean t\u1ed1 N, P, K, s\u1eed d\u1ee5ng NPK theo c\u00f4ng th\u1ee9c N1P2K1 (1,5g N + 3,0g P + 1,5g K) l\u00e0 t\u1ed1t nh\u1ea5t cho sinh tr\u01b0\u1edfng v\u00e0 bi\u1ec3u hi\u1ec7n v\u1ec1 h\u00ecnh th\u00e1i. T\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t = 45%. T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y sau khi ra b\u1ea7u 1 th\u00e1ng \u0111\u1ea1t >80%, c\u00f3 th\u1ec3 t\u1ea1o gi\u1ed1ng Ch\u00f2 ch\u1ec9 b\u1eb1ng gi\u00e2m hom v\u1edbi c\u00e1c ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng l\u00e0 IBA v\u00e0 IAA n\u1ed3ng \u0111\u1ed9 0,5 \u2013 1%, c\u00e2y con xu\u1ea5t v\u01b0\u1eddn t\u1ed1t nh\u1ea5t khi \u0111\u1ea1t 12 &#8211; 15 th\u00e1ng tu\u1ed5i; \u0111\u01b0\u1eddng k\u00ednh c\u1ed5 r\u1ec5: 0,5 &#8211; 0,6cm; chi\u1ec1u cao b\u00ecnh qu\u00e2n: 60 &#8211; 80cm; c\u00e2y \u0111\u00e3 ho\u00e1 g\u1ed7 ho\u00e0n to\u00e0n. Tr\u1ed3ng Ch\u00f2 ch\u1ec9 thu\u1ea7n lo\u00e0i ho\u1eb7c h\u1ed7n giao v\u1edbi S\u1ea5u\/Re (N=540) \u0111\u1ed3ng th\u1eddi b\u00f3n l\u00f3t 30g N + 120g P + 90g K v\u00e0 b\u00f3n th\u00fac 200g NPK t\u1ed5ng h\u1ee3p s\u1ebd mang l\u1ea1i hi\u1ec7u qu\u1ea3 cao nh\u1ea5t khi tr\u1ed3ng \u1edf n\u01a1i c\u00f3 \u0111\u1ed9 \u1ea9m cao. <\/p>\n<p> <strong>T\u1eeb kho\u00e1:<\/strong> Ch\u00f2 ch\u1ec9, ch\u1ebf \u0111\u1ed9 dinh d\u01b0\u1ee1ng, ch\u1ebf \u0111\u1ed9 \u00e1nh s\u00e1ng, nhu c\u1ea7u n\u01b0\u1edbc.<strong><\/strong> <\/p>\n<p> <strong>\u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/strong> <\/p>\n<p> Lo\u00e0i Ch\u00f2 ch\u1ec9 (<em>Parashorea chinensis<\/em> Wang Hsie) c\u00f2n c\u00f3 t\u00ean g\u1ecdi l\u00e0 M\u1ea1y kho, thu\u1ed9c h\u1ecd D\u1ea7u (Dipterocarpaceae) ng\u00e0nh M\u1ed9c lan (Magnoliophyta), h\u1ea1t k\u00edn (Angiospermae) l\u00e0 lo\u00e0i c\u00e2y c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao thu\u1ed9c ph\u00e2n nh\u00f3m ch\u00ednh nh\u00f3m III, l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, sinh tr\u01b0\u1edfng nhanh, th\u00e2n th\u1eb3ng, ph\u00e2n c\u00e0nh cao. Ch\u00f2 ch\u1ec9 thu\u1ed9c lo\u00e0i c\u00e2y c\u00f3 b\u1ea1nh v\u00e8 l\u1edbn, g\u1ed7 m\u00e0u v\u00e0ng nh\u1ea1t, kh\u00f4ng hay b\u1ecb n\u1ee9t, ch\u1ed1ng \u0111\u01b0\u1ee3c m\u1ed1i m\u1ecdt, ch\u1ecbu \u0111\u01b0\u1ee3c n\u01b0\u1edbc n\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong x\u00e2y d\u1ef1ng v\u00e0 \u0111\u1ed3 m\u1ed9c. <\/p>\n<p> Hi\u1ec7n nay vi\u1ec7c g\u00e2y tr\u1ed3ng c\u00e2y Ch\u00f2 ch\u1ec9 g\u1eb7p r\u1ea5t nhi\u1ec1u kh\u00f3 kh\u0103n v\u00ec thi\u1ebfu th\u00f4ng tin v\u00e0 nh\u1eefng c\u01a1 s\u1edf khoa h\u1ecdc c\u1ea7n thi\u1ebft. Ch\u00ednh v\u00ec xu\u1ea5t ph\u00e1t t\u1eeb th\u1ef1c t\u1ebf \u0111\u00f3, Trung t\u00e2m Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng ti\u1ebfn h\u00e0nh th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i &#8220;Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 c\u01a1 s\u1edf khoa h\u1ecdc ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng Ch\u00f2 ch\u1ec9 (<em>Parashorea chinensis<\/em> Wang Hsie) t\u1ea1i v\u00f9ng ph\u00f2ng h\u1ed9 \u0111\u1ea7u ngu\u1ed3n s\u00f4ng \u0110\u00e0&#8221; nh\u1eb1m g\u00f3p ph\u1ea7n cung c\u1ea5p nh\u1eefng th\u00f4ng tin khoa h\u1ecdc v\u1ec1 lo\u00e0i Ch\u00f2 ch\u1ec9 l\u00e0m ti\u1ec1n \u0111\u1ec1 cho vi\u1ec7c nghi\u00ean c\u1ee9u s\u00e2u h\u01a1n c\u00e1c \u0111\u1eb7c t\u00ednh sinh v\u1eadt h\u1ecdc c\u1ee7a lo\u00e0i c\u00e2y n\u00e0y trong nh\u1eefng th\u1eddi gian ti\u1ebfp theo. <\/p>\n<p> <em>(K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u khoa h\u1ecdc c\u00f4ng ngh\u1ec7 giai \u0111o\u1ea1n 2006-2010, trang 153-161)<\/em> <\/p>\n","protected":false},"excerpt":{"rendered":"<p align=\"justify\">\n<span style=\"font-family: Arial; font-size: 10pt\">Ch&ograve; ch\u1ec9 l&agrave; lo&agrave;i ph&acirc;n b\u1ed1 h\u1eb9p, th\u01b0\u1eddng m\u1ecdc \u1edf n\u01a1i c&oacute; \u0111\u1ed9 cao d\u01b0\u1edbi 700m, n\u01a1i c&oacute; th&agrave;nh ph\u1ea7n c\u01a1 gi\u1edbi t\u1eeb th\u1ecbt trung b&igrave;nh \u0111\u1ebfn s&eacute;t n\u1eb7ng, \u0111\u1ea5t c&oacute; ph\u1ea3n \u1ee9ng h\u01a1i chua (&lt;5). C&aacute;c l&acirc;m ph\u1ea7n \u0111i\u1ec1u tra c&oacute; 864 &#8211; 943 c&aacute; th\u1ec3 c\u1ee7a 49 &#8211; 59 lo&agrave;i, trong \u0111&oacute; Ch&ograve; ch\u1ec9 chi\u1ebfm 2,6% &ndash; 4,5%, \u0111\u1ea1t 3,2% t\u1ed5ng G; 3,2 &#8211; 5,5% t\u1ed5ng V. L&agrave; lo&agrave;i c&oacute; s\u1ed1 c&aacute; th\u1ec3 t&aacute;i sinh th\u1ea5p (chi\u1ebfm 2,5% &ndash; 2,7%). <\/span><\/p>\n","protected":false},"author":252,"featured_media":1816,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/1535"}],"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\/252"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=1535"}],"version-history":[{"count":5,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/1535\/revisions"}],"predecessor-version":[{"id":9750,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/1535\/revisions\/9750"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media\/1816"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=1535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=1535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=1535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}