{"id":9680,"date":"2011-12-07T08:14:52","date_gmt":"2011-12-07T01:14:52","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2011\/12\/xay-dung-mo-hinh-tinh-toan-sinh-khoi-cay-ca-the-thong-ba-la-o-huyen-hoang-su-phi-tinh-ha-giang\/"},"modified":"2015-05-19T14:15:40","modified_gmt":"2015-05-19T07:15:40","slug":"xay-dung-mo-hinh-tinh-toan-sinh-khoi-cay-ca-the-thong-ba-la-o-huyen-hoang-su-phi-tinh-ha-giang","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/xay-dung-mo-hinh-tinh-toan-sinh-khoi-cay-ca-the-thong-ba-la-o-huyen-hoang-su-phi-tinh-ha-giang\/","title":{"rendered":"X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh t\u00ednh to\u00e1n sinh kh\u1ed1i c\u00e2y c\u00e1 th\u1ec3 Th\u00f4ng ba l\u00e1 \u1edf huy\u1ec7n Ho\u00e0ng Su Ph\u00ec t\u1ec9nh H\u00e0 Giang"},"content":{"rendered":"

V\u0169 T\u1ea5n Ph\u01b0\u01a1ng<\/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

\u0110\u1ec3 h\u1ed7 tr\u1ee3 cho vi\u1ec7c x\u00e1c \u0111\u1ecbnh tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1, nghi\u00ean c\u1ee9u ti\u1ebfn h\u00e0nh x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh to\u00e1n v\u00e0 c\u00e1c h\u1ec7 s\u1ed1 chuy\u1ec3n \u0111\u1ed5i cho t\u00ednh to\u00e1n sinh kh\u1ed1i l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng. Nghi\u00ean c\u1ee9u ti\u1ebfn h\u00e0nh t\u1ea1i huy\u1ec7n Ho\u00e0ng Su Ph\u00ec t\u1ec9nh H\u00e0 Giang. Ph\u01b0\u01a1ng ph\u00e1p ch\u1eb7t h\u1ea1 v\u00e0 \u0111o \u0111\u1ebfm tr\u1ef1c ti\u1ebfp sinh kh\u1ed1i \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. C\u00e1c c\u00e2y ch\u1eb7t h\u1ea1 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn \u1edf c\u00e1c l\u00e2m ph\u1ea7n kh\u00e1c nhau, \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea5t \u0111ai, \u0111\u1ecba h\u00ecnh v\u00e0 tu\u1ed5i r\u1eebng. Tr\u00ean c\u01a1 s\u1edf \u0111o \u0111\u1ebfm sinh kh\u1ed1i c\u1ee7a 26 c\u00e2y c\u00e1 th\u1ec3, ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch t\u01b0\u01a1ng quan gi\u1eefa sinh kh\u1ed1i v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra. K\u1ebft qu\u1ea3 cho th\u1ea5y c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan gi\u1eefa sinh kh\u1ed1i c\u00e1c b\u1ed9 ph\u1eadn, t\u1ed5ng sinh kh\u1ed1i, sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t v\u00e0 tr\u1eef l\u01b0\u1ee3ng c\u00e2y c\u00e1 th\u1ec3 v\u1edbi \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec1u t\u1ed3n t\u1ea1i v\u00e0 c\u00f3 h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan h\u1ea7u h\u1ebft n\u1eb1m trong kho\u1ea3ng 0,9\u2264r<1, th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 r\u1ea5t ch\u1eb7t gi\u1eefa sinh kh\u1ed1i v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c. Nghi\u00ean c\u1ee9u v\u1ec1 h\u1ec7 s\u1ed1 chuy\u1ec3n \u0111\u1ed5i sinh kh\u1ed1i (BEF) cho th\u1ea5y BEF c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m d\u1ea7n theo tu\u1ed5i v\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh khi r\u1eebng \u0111\u1ea1t tu\u1ed5i th\u00e0nh th\u1ee5c. Gi\u00e1 tr\u1ecb BEF l\u00e0 0,737\u00b10,155. T\u1ef7 l\u1ec7 sinh kh\u1ed1i d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t so v\u1edbi sinh kh\u1ed1i d\u01b0\u1edbi \u0111\u1ea5t (R\/S) l\u00e0 0,177 \u00b1 0,025.<\/p>\n

T\u1eeb kh\u00f3a: <\/strong>carbon, sinh kh\u1ed1i, Th\u00f4ng ba l\u00e1.<\/p>\n

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

Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng t\u1edbi kinh t\u1ebf, x\u00e3 h\u1ed9i, c\u00e1c k\u1ebf ho\u1ea1ch ph\u00e1t tri\u1ec3n v\u00e0 g\u00e2y \u0111\u00f3i ngh\u00e8o \u1edf nhi\u1ec1u qu\u1ed1c gia trong \u0111\u00f3 c\u00f3 Vi\u1ec7t Nam. Nguy\u00ean nh\u00e2n g\u00e2y ra bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu \u0111\u01b0\u1ee3c kh\u1eb3ng \u0111\u1ecbnh l\u00e0 do s\u1ef1 gia t\u0103ng nhanh ch\u00f3ng n\u1ed3ng \u0111\u1ed9 kh\u00ed nh\u00e0 k\u00ednh (ch\u1ee7 y\u1ebfu l\u00e0 kh\u00ed CO2<\/sub>) trong kh\u00ed quy\u1ec3n (UNFCCC, 2007). Schimmel v\u00e0 c\u1ed9ng s\u1ef1 (1995) c\u0169ng cho r\u1eb1ng gia t\u0103ng n\u1ed3ng \u0111\u1ed9 kh\u00ed CO2<\/sub> v\u00e0 c\u00e1c kh\u00ed nh\u00e0 k\u00ednh kh\u00e1c (GHGs) l\u00e0 nguy\u00ean nh\u00e2n ch\u1ee7 y\u1ebfu g\u00e2y n\u00ean hi\u1ec7n t\u01b0\u1ee3ng bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu hi\u1ec7n nay v\u00e0 gia t\u0103ng nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t tr\u00e1i \u0111\u1ea5t. Bouman v\u00e0 c\u1ed9ng s\u1ef1 (1999) cho r\u1eb1ng c\u00e1c nghi\u00ean c\u1ee9u \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u01a1 ch\u1ebf h\u1ea5p th\u1ee5 carbon trong m\u00f4i tr\u01b0\u1eddng \u0111\u00e3 v\u00e0 \u0111ang gia t\u0103ng, c\u00e1c ngh\u1ecb \u0111\u1ecbnh qu\u1ed1c t\u1ebf v\u1ec1 h\u1ea5p th\u1ee5 carbon \u0111ang \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n m\u1ea1nh m\u1ebd (Brown v\u00e0 c\u1ed9ng s\u1ef1, 1996). H\u1ea5p th\u1ee5 carbon hi\u1ec7n nay l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf qu\u1ea3n l\u00fd r\u1eebng \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn v\u00e0 \u0111i k\u00e8m v\u1edbi c\u00e1c c\u01a1 ch\u1ebf kinh t\u1ebf \u1edf c\u1ea5p v\u0129 m\u00f4, ch\u1ee7 y\u1ebfu do s\u00e1ng ki\u1ebfn “t\u00edn ch\u1ec9 carbon” (Silver v\u00e0 c\u1ed9ng s\u1ef1, 1996).<\/p>\n

Cho \u0111\u1ebfn nay c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 carbon tr\u00ean th\u1ebf gi\u1edbi r\u1ea5t \u0111a d\u1ea1ng v\u1edbi vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a nhi\u1ec1u ki\u1ec3u r\u1eebng kh\u00e1c nhau. Gi\u00e1 tr\u1ecb h\u1ea5p th\u1ee5 carbon th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c th\u1eeba nh\u1eadn v\u1edbi s\u1ef1 ra \u0111\u1eddi c\u1ee7a Ngh\u1ecb \u0111\u1ecbnh th\u01b0 Kyoto (1997) v\u00e0 s\u1ef1 ghi nh\u1eadn c\u1ee7a Ngh\u1ecb \u0111\u1ecbnh n\u00e0y \u0111\u1ed1i v\u1edbi vai tr\u00f2 c\u1ee7a c\u00e1c h\u1ec7 sinh th\u00e1i r\u1eebng trong vi\u1ec7c h\u1ea5p th\u1ee5 carbon, gi\u1ea3m nh\u1eb9 t\u00e1c \u0111\u1ed9ng c\u1ee7a bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu. Tr\u1eef l\u01b0\u1ee3ng CO2<\/sub> c\u1ee7a m\u1ed9t c\u00e2y \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 t\u1eeb kh\u00f4ng kh\u00ed th\u1ec3 hi\u1ec7n trong sinh kh\u1ed1i c\u1ee7a c\u00e2y \u0111\u00f3. T\u1ed5ng h\u1ee3p c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 sinh kh\u1ed1i c\u1ee7a m\u1ed9t s\u1ed1 lo\u1ea1i r\u1eebng tr\u1ed3ng cho th\u1ea5y, Th\u00f4ng caribaea \u1edf r\u1eebng Hantana c\u00f3 t\u1ed5ng l\u01b0\u1ee3ng sinh kh\u1ed1i l\u00e0 231 t\u1ea5n\/ha (Mahesh Khadka<\/a>, 2005), sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t c\u1ee7a r\u1eebng tr\u1ed3ng T\u1ebfch (Tecnona grandis<\/em>) 30 tu\u1ed5i t\u1ea1i Sri Lanka l\u00e0 141 t\u1ea5n\/ha (Jha, 1995). Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi Negi v\u00e0 Sharma (1985) ch\u1ec9 ra r\u1eb1ng sinh kh\u1ed1i kh\u00f4 tr\u00ean m\u1eb7t \u0111\u1ea5t c\u1ee7a b\u1ea1ch \u0111\u00e0n cao s\u1ea3n (Eucalyptus hybrid<\/em>) l\u00e0 121 t\u1ea5n\/ha, trong khi \u0111\u00f3 m\u1ed9t nghi\u00ean c\u1ee9u kh\u00e1c cho th\u1ea5y sinh kh\u1ed1i tr\u00ean m\u1eb7t \u0111\u1ea5t c\u1ee7a b\u1ea1ch \u0111\u00e0n (Eucalyptus grandis<\/em>) l\u00e0 kho\u1ea3ng 112-130 t\u1ea5n\/ha (Tandon v\u00e0 cs, 1988). Kaul v\u00e0 Sharma (1983) ch\u1ec9 ra r\u1eb1ng l\u01b0\u1ee3ng sinh kh\u1ed1i kh\u00f4 tr\u00ean m\u1eb7t \u0111\u1ea5t c\u1ee7a Populus deltoids \u1edf v\u00f9ng b\u00e1n n\u1ed9i \u0111\u1ecba \u1edf \u1ea4n \u0111\u1ed9 l\u00e0 175 t\u1ea5n\/ha. Shorea robusta<\/em>, m\u1ed9t trong nh\u1eefng lo\u00e0i nh\u1eadp ngo\u1ea1i \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn \u1edf v\u00f9ng b\u00e1n l\u1ee5c \u0111\u1ecba c\u00f3 t\u1ed5ng l\u01b0\u1ee3ng sinh kh\u1ed1i kh\u00f4 l\u00e0 200-700 t\u1ea5n\/ha \u1edf tu\u1ed5i 100 (Rana, 1985; Negi v\u00e0 cs, 2003).<\/p>\n","protected":false},"excerpt":{"rendered":"

\n\u0110\u1ec3 h\u1ed7 tr\u1ee3 cho vi\u1ec7c xác \u0111\u1ecbnh tr\u1eef l\u01b0\u1ee3ng carbon c\u1ee7a r\u1eebng tr\u1ed3ng Thông ba lá, nghiên c\u1ee9u ti\u1ebfn hành xây d\u1ef1ng mô hình toán và các h\u1ec7 s\u1ed1 chuy\u1ec3n \u0111\u1ed5i cho tính toán sinh kh\u1ed1i làm c\u01a1 s\u1edf cho vi\u1ec7c xác \u0111\u1ecbnh kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng. Nghiên c\u1ee9u ti\u1ebfn hành t\u1ea1i huy\u1ec7n Hoàng Su Phì t\u1ec9nh Hà Giang. Ph\u01b0\u01a1ng pháp ch\u1eb7t h\u1ea1 và \u0111o \u0111\u1ebfm tr\u1ef1c ti\u1ebfp sinh kh\u1ed1i \u0111\u01b0\u1ee3c áp d\u1ee5ng. Các cây ch\u1eb7t h\u1ea1 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn \u1edf các lâm ph\u1ea7n khác nhau, \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea5t \u0111ai, \u0111\u1ecba hình và tu\u1ed5i r\u1eebng.<\/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\/9680"}],"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=9680"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9680\/revisions"}],"predecessor-version":[{"id":15236,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9680\/revisions\/15236"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}