{"id":9684,"date":"2011-12-09T03:51:35","date_gmt":"2011-12-08T20:51:35","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2011\/12\/cau-truc-sinh-khoi-cua-rung-trong-thong-ba-la-thuan-loai-tai-lam-dong\/"},"modified":"2015-05-19T14:16:43","modified_gmt":"2015-05-19T07:16:43","slug":"cau-truc-sinh-khoi-cua-rung-trong-thong-ba-la-thuan-loai-tai-lam-dong","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/cau-truc-sinh-khoi-cua-rung-trong-thong-ba-la-thuan-loai-tai-lam-dong\/","title":{"rendered":"C\u1ea5u tr\u00fac sinh kh\u1ed1i c\u1ee7a r\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1 thu\u1ea7n lo\u00e0i t\u1ea1i L\u00e2m \u0110\u1ed3ng"},"content":{"rendered":"<p><strong>V\u0169 T\u1ea5n Ph\u01b0\u01a1ng, V\u00f5 \u0110\u1ea1i H\u1ea3i<\/strong><\/p>\n<p><em>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em><\/p>\n<p><strong>T\u00d3M T\u1eaeT<\/strong><\/p>\n<p>Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, vai tr\u00f2 c\u1ee7a r\u1eebng trong vi\u1ec7c h\u1ea5p th\u1ee5 carbon, gi\u1ea3m nh\u1eb9 ph\u00e1t th\u1ea3i kh\u00ed nh\u00e0 k\u00ednh \u0111ang \u0111\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng Qu\u1ed1c t\u1ebf v\u00e0 Vi\u1ec7t Nam r\u1ea5t quan t\u00e2m. Do v\u1eady, vi\u1ec7c nghi\u00ean c\u1ee9u sinh kh\u1ed1i l\u00e0 m\u1ed9t y\u00eau c\u1ea7u kh\u00e1ch quan v\u00e0 c\u1ea5p b\u00e1ch ph\u1ee5c v\u1ee5 cho vi\u1ec7c t\u00ednh to\u00e1n ph\u00e1t th\u1ea3i v\u00e0 th\u01b0\u01a1ng m\u1ea1i gi\u00e1 tr\u1ecb h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i L\u00e2m \u0110\u1ed3ng, n\u01a1i r\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1 chi\u1ebfm di\u1ec7n t\u00edch l\u1edbn. Nghi\u00ean c\u1ee9u ti\u1ebfn h\u00e0nh x\u00e1c \u0111\u1ecbnh sinh kh\u1ed1i v\u00e0 c\u1ea5u tr\u00fac sinh kh\u1ed1i c\u1ee7a l\u00e2m ph\u1ea7n r\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1, g\u1ed3m sinh kh\u1ed1i t\u1ea7ng c\u00e2y g\u1ed7, sinh kh\u1ed1i t\u1ea7ng c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i v\u00e0 sinh kh\u1ed1i th\u1ea3m m\u1ee5c theo tu\u1ed5i r\u1eebng v\u00e0 c\u1ea5p \u0111\u1ea5t. Bi\u1ec3u c\u1ea5p \u0111\u1ea5t cho Th\u00f4ng ba l\u00e1 \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng nh\u01b0ng m\u1edbi \u0111\u1ec1 c\u1eadp \u0111\u1ebfn sinh tr\u01b0\u1edfng (D, H) c\u1ee7a l\u00e2m ph\u1ea7n theo t\u1eebng c\u1ea5p \u0111\u1ea5t (B\u1ed9 NN&amp;PTNT 2003).<\/p>\n<p>K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y t\u1ed5ng sinh kh\u1ed1i c\u1ee7a to\u00e0n l\u00e2m ph\u1ea7n \u1edf c\u1ea5p \u0111\u1ea5t I l\u00e0 kho\u1ea3ng 348 t\u1ea5n\/ha; tr\u00ean c\u1ea5p \u0111\u1ea5t II l\u00e0 kho\u1ea3ng 258 t\u1ea5n\/ha; tr\u00ean c\u1ea5p \u0111\u1ea5t III l\u00e0 kho\u1ea3ng 171 t\u1ea5n\/ha; tr\u00ean c\u1ea5p \u0111\u1ea5t IV l\u00e0 kho\u1ea3ng 120 t\u1ea5n\/ha; v\u00e0 tr\u00ean c\u1ea5p \u0111\u1ea5t V l\u00e0 kho\u1ea3ng 86 t\u1ea5n\/ha. C\u1ea5u tr\u00fac sinh kh\u1ed1i t\u1ea7ng c\u00e2y g\u1ed7 (c\u00e2y r\u1eebng) trong l\u00e2m ph\u1ea7n l\u00e0 kho\u1ea3ng 86% (dao \u0111\u1ed9ng t\u1eeb 82-94%); c\u1ee7a t\u1ea7ng c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i l\u00e0 3,9% (dao \u0111\u1ed9ng t\u1eeb 1,3-7,7%); v\u00e0 c\u1ee7a t\u1ea7ng th\u1ea3m m\u1ee5c l\u00e0 10,5% (dao \u0111\u1ed9ng t\u1eeb 4,6-16,6%).<\/p>\n<p><strong>T\u1eeb kho\u00e1:<\/strong> Sinh kh\u1ed1i, Th\u00f4ng ba l\u00e1, L\u00e2m \u0110\u1ed3ng.<\/p>\n<p><strong>\u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/strong><\/p>\n<p>Nghi\u00ean c\u1ee9u sinh kh\u1ed1i v\u00e0 t\u0103ng c\u01b0\u1eddng tr\u1ed3ng r\u1eebng tr\u00ean c\u00e1c di\u1ec7n t\u00edch \u0111\u1ea5t tr\u1ed1ng \u0111\u1ed3i n\u00fai tr\u1ecdc \u1edf c\u00e1c v\u00f9ng nhi\u1ec7t \u0111\u1edbi t\u1eeb l\u00e2u \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eeba nh\u1eadn l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p h\u1eefu hi\u1ec7u trong vi\u1ec7c gi\u1ea3m t\u1ef7 l\u1ec7 gia t\u0103ng c\u1ee7a kh\u00ed CO<sub>2<\/sub> trong kh\u00ed quy\u1ec3n (Dyson, 1977). Khi c\u00e2y sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n, ch\u00fang h\u1ea5p th\u1ee5 carbon trong c\u00e1c t\u1ebf b\u00e0o v\u00e0 \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c gia t\u0103ng sinh kh\u1ed1i c\u1ee7a c\u00e2y (trong r\u1eebng ho\u1eb7c trong c\u00e1c s\u1ea3n ph\u1ea9m t\u1eeb r\u1eebng), nh\u01b0 v\u1eady n\u1ed3ng \u0111\u1ed9 kh\u00ed CO<sub>2<\/sub> trong kh\u00ed quy\u1ec3n s\u1ebd gi\u1ea3m \u0111i. Kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 kh\u00ed CO<sub>2\u00ad<\/sub> c\u1ee7a r\u1eebng l\u00e0 v\u1ea5n \u0111\u1ec1 ti\u00ean quy\u1ebft trong vi\u1ec7c th\u00fac \u0111\u1ea9y c\u00e1c d\u1ef1 \u00e1n h\u1ea5p th\u1ee5 carbon \u1edf c\u00e1c n\u01b0\u1edbc \u0111ang ph\u00e1t tri\u1ec3n, c\u00e1c qu\u1ed1c gia n\u00e0y c\u00f3 th\u1ec3 nh\u1eadn \u0111\u1ea7u t\u01b0 t\u1eeb c\u00e1c c\u00f4ng ty, ch\u00ednh ph\u1ee7 c\u00f3 mong mu\u1ed1n b\u00f9 \u0111\u1eafp l\u1ea1i l\u01b0\u1ee3ng ph\u00e1t th\u1ea3i kh\u00ed nh\u00e0 k\u00ednh c\u1ee7a h\u1ecd theo c\u01a1 ch\u1ebf ph\u00e1t tri\u1ec3n s\u1ea1ch c\u1ee7a Ngh\u1ecb \u0111\u1ecbnh th\u01b0 Kyoto (Fearnside, 1999).<\/p>\n<p>\u1ede Vi\u1ec7t Nam, c\u00e1c nghi\u00ean c\u1ee9u c\u01a1 s\u1edf v\u1ec1 sinh kh\u1ed1i v\u00e0 tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng \u0111ang \u0111\u01b0\u1ee3c quan t\u00e2m nghi\u00ean c\u1ee9u t\u1eeb m\u1ed9t v\u00e0i n\u0103m g\u1ea7n \u0111\u00e2y v\u00e0 c\u0169ng \u0111\u00e3 c\u00f3 nh\u1eefng th\u00e0nh t\u1ef1u \u0111\u00e1ng k\u1ec3. C\u00e1c nghi\u00ean c\u1ee9u \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m nghi\u00ean c\u1ee9u tr\u1eef l\u01b0\u1ee3ng carbon trong c\u00e1c th\u1ea3m th\u1ef1c v\u1eadt nh\u01b0 c\u1ecf tranh, lau l\u00e1ch v\u00e0 c\u00e2y b\u1ee5i (V\u0169 T\u1ea5n Ph\u01b0\u01a1ng v\u00e0 cs, 2005); tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng, Keo l\u00e1 tr\u00e0m, B\u1ea1ch \u0111\u00e0n urophylla (Ng\u00f4 \u0110\u00ecnh Qu\u1ebf v\u00e0 cs, 2006; V\u0169 T\u1ea5n ph\u01b0\u01a1ng v\u00e0 cs, 2007); Th\u00f4ng (Nguy\u1ec5n Ng\u1ecdc Lung v\u00e0 cs, 2004; v\u00e0 V\u00f5 \u0110\u1ea1i H\u1ea3i v\u00e0 cs, 2009).<\/p>\n<p>Th\u00f4ng ba l\u00e1 l\u00e0 lo\u00e0i c\u00e2y c\u00f3 ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean \u1edf v\u00f9ng T\u00e2y Nguy\u00ean (nh\u01b0 L\u00e2m \u0110\u1ed3ng, Kon Tum, v.v) v\u00e0 T\u00e2y B\u1eafc (H\u00e0 Giang). Th\u00f4ng ba l\u00e1 l\u00e0 lo\u00e0i c\u00e2y ch\u1ee7 l\u1ef1c trong tr\u1ed3ng r\u1eebng \u1edf c\u00e1c t\u1ec9nh T\u00e2y Nguy\u00ean v\u00e0 m\u1ed9t s\u1ed1 v\u00f9ng \u1edf H\u00e0 Giang. Th\u00f4ng ba l\u00e1 l\u00e0 lo\u00e0i c\u00e2y sinh tr\u01b0\u1edfng kh\u00e1 nhanh, n\u00ean ngo\u00e0i gi\u00e1 tr\u1ecb v\u1ec1 g\u1ed7 th\u00ec sinh kh\u1ed1i v\u00e0 tr\u1eef l\u01b0\u1ee3ng carbon \u0111\u01b0\u1ee3c cho l\u00e0 kh\u00e1 l\u1edbn, c\u00f3 ti\u1ec1m n\u0103ng cao trong vi\u1ec7c h\u1ea5p th\u1ee5 carbon. Ch\u00ednh v\u00ec v\u1eady vi\u1ec7c nghi\u00ean c\u1ee9u sinh kh\u1ed1i v\u00e0 tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1 \u1edf L\u00e2m \u0110\u1ed3ng s\u1ebd cung c\u1ea5p c\u01a1 s\u1edf khoa h\u1ecdc quan tr\u1ecdng trong vi\u1ec7c ki\u1ec3m k\u00ea kh\u00ed nh\u00e0 k\u00ednh v\u00e0 th\u01b0\u01a1ng m\u1ea1i gi\u00e1 tr\u1ecb carbon c\u1ee7a r\u1eebng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p style=\"text-align: justify; margin: 6pt 0pt\" class=\"MsoNormal\" align=\"justify\">\n<span style=\"font-family: Arial; font-size: 10pt\">Trong nh\u1eefng n\u0103m g\u1ea7n \u0111&acirc;y, vai tr&ograve; c\u1ee7a r\u1eebng trong vi\u1ec7c h\u1ea5p th\u1ee5 carbon, gi\u1ea3m nh\u1eb9 ph&aacute;t th\u1ea3i kh&iacute; nh&agrave; k&iacute;nh \u0111ang \u0111\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng Qu\u1ed1c t\u1ebf v&agrave; Vi\u1ec7t Nam r\u1ea5t quan t&acirc;m. Do v\u1eady, vi\u1ec7c nghi&ecirc;n c\u1ee9u sinh kh\u1ed1i l&agrave; m\u1ed9t y&ecirc;u c\u1ea7u kh&aacute;ch quan v&agrave; c\u1ea5p b&aacute;ch ph\u1ee5c v\u1ee5 cho vi\u1ec7c t&iacute;nh to&aacute;n ph&aacute;t th\u1ea3i v&agrave; th\u01b0\u01a1ng m\u1ea1i gi&aacute; tr\u1ecb h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng. Nghi&ecirc;n c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i L&acirc;m \u0110\u1ed3ng, n\u01a1i r\u1eebng tr\u1ed3ng Th&ocirc;ng ba l&aacute; chi\u1ebfm di\u1ec7n t&iacute;ch l\u1edbn. Nghi&ecirc;n c\u1ee9u ti\u1ebfn h&agrave;nh x&aacute;c \u0111\u1ecbnh sinh kh\u1ed1i v&agrave; c\u1ea5u tr&uacute;c sinh kh\u1ed1i c\u1ee7a l&acirc;m ph\u1ea7n r\u1eebng tr\u1ed3ng Th&ocirc;ng ba l&aacute;, g\u1ed3m sinh kh\u1ed1i t\u1ea7ng c&acirc;y g\u1ed7, sinh kh\u1ed1i t\u1ea7ng c&acirc;y b\u1ee5i th\u1ea3m t\u01b0\u01a1i v&agrave; sinh kh\u1ed1i th\u1ea3m m\u1ee5c theo tu\u1ed5i r\u1eebng v&agrave; c\u1ea5p \u0111\u1ea5t. Bi\u1ec3u c\u1ea5p \u0111\u1ea5t cho Th&ocirc;ng ba l&aacute; \u0111&atilde; \u0111\u01b0\u1ee3c x&acirc;y d\u1ef1ng nh\u01b0ng m\u1edbi \u0111\u1ec1 c\u1eadp \u0111\u1ebfn sinh tr\u01b0\u1edfng (D, H) c\u1ee7a l&acirc;m ph\u1ea7n theo t\u1eebng c\u1ea5p \u0111\u1ea5t (B\u1ed9 NN&amp;PTNT 2003).<\/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\/9684"}],"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=9684"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9684\/revisions"}],"predecessor-version":[{"id":15239,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9684\/revisions\/15239"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}