{"id":12686,"date":"2014-04-07T10:29:08","date_gmt":"2014-04-07T03:29:08","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=12686"},"modified":"2014-04-07T10:35:26","modified_gmt":"2014-04-07T03:35:26","slug":"bao-cao-tom-tat-de-tai-nghien-cuu-kha-nang-hap-thu-va-gia-tri-thuong-mai-carbon-cua-mot-so-dang-rung-trong-chu-yeu-o-viet-nam","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-tom-tat-de-tai-nghien-cuu-kha-nang-hap-thu-va-gia-tri-thuong-mai-carbon-cua-mot-so-dang-rung-trong-chu-yeu-o-viet-nam\/","title":{"rendered":"B\u00e1o c\u00e1o t\u00f3m t\u1eaft \u0111\u1ec1 t\u00e0i: Nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 v\u00e0 gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a m\u1ed9t s\u1ed1 d\u1ea1ng r\u1eebng tr\u1ed3ng ch\u1ee7 y\u1ebfu \u1edf Vi\u1ec7t Nam"},"content":{"rendered":"

Ch\u1ee7 nhi\u1ec7m: PGS.TS V\u00f5 \u0110\u1ea1i H\u1ea3i;<\/i><\/b> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/i><\/b><\/p>\n

I. \u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/b><\/p>\n

\u1ede Vi\u1ec7t Nam, ng\u00e0y 28\/3\/2007 Th\u1ee7 t\u01b0\u1edbng Ch\u00ednh ph\u1ee7 \u0111\u00e3 ban h\u00e0nh Ngh\u1ecb \u0111\u1ecbnh s\u1ed1 48\/2007\/N\u0110-CP v\u1ec1 nguy\u00ean t\u1eafc v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh gi\u00e1 c\u00e1c lo\u1ea1i r\u1eebng<\/i>, hi\u1ec7n nay \u0111ang b\u01b0\u1edbc v\u00e0o th\u1ef1c hi\u1ec7n Ngh\u1ecb \u0111\u1ecbnh 99 v\u1ec1 chi tr\u1ea3 d\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng r\u1eebng. Vi\u1ec7c \u0111\u1ecbnh l\u01b0\u1ee3ng kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon v\u00e0 gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a r\u1eebng l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong \u0111\u1ecbnh l\u01b0\u1ee3ng gi\u00e1 tr\u1ecb m\u00f4i tr\u01b0\u1eddng c\u1ee7a r\u1eebng, \u0111\u00e3 v\u00e0 \u0111ang tr\u1edf th\u00e0nh m\u1ed9t \u0111\u00f2i h\u1ecfi kh\u00e1ch quan kh\u00f4ng th\u1ec3 ch\u1eadm tr\u1ec5 nh\u1eb1m \u0111\u01b0a Lu\u1eadt B\u1ea3o v\u1ec7 v\u00e0 Ph\u00e1t tri\u1ec3n r\u1eebng v\u00e0o th\u1ef1c ti\u1ec5n s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p.<\/p>\n

\"CMD\"<\/a><\/p>\n

C\u00e1c lo\u00e0i Keo lai, Keo tai t\u01b0\u1ee3ng, Keo l\u00e1 tr\u00e0m, Th\u00f4ng m\u00e3 v\u0129, Th\u00f4ng nh\u1ef1a, Th\u00f4ng ba la\u0301, M\u1ee1 v\u00e0 B\u1ea1ch \u0111\u00e0n Urophylla v\u1edbi nh\u1eefng \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i nh\u01b0 sinh tr\u01b0\u1edfng nhanh, n\u0103ng su\u1ea5t cao,… \u0111\u00e3 nhanh ch\u00f3ng tr\u1edf th\u00e0nh lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u00ednh tr\u00ean kh\u1eafp c\u00e1c v\u00f9ng sinh th\u00e1i l\u00e2m nghi\u1ec7p n\u01b0\u1edbc ta. Trong th\u1eddi gian g\u1ea7n \u0111\u00e2y, nghi\u00ean c\u1ee9u v\u1ec1 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng tr\u00ean th\u1ebf gi\u1edbi c\u0169ng nh\u01b0 \u1edf n\u01b0\u1edbc ta \u0111\u00e3 \u0111\u01b0\u1ee3c quan t\u00e2m ch\u00fa \u00fd<\/b> nhi\u1ec1u h\u01a1n v\u00e0 b\u01b0\u1edbc \u0111\u1ea7u c\u0169ng \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 \u0111\u00e1ng kh\u00edch l\u1ec7. Tuy nhi\u00ean, h\u1ea7u h\u1ebft c\u00e1c nghi\u00ean c\u1ee9u c\u00f2n nh\u1ecf l\u1ebb, t\u1ea3n m\u1ea1n, ch\u01b0a c\u00f3 h\u1ec7 th\u1ed1ng, thi\u1ebfu c\u00e1c d\u1eef li\u1ec7u c\u01a1 b\u1ea3n, \u0111\u1eb7c bi\u1ec7t l\u00e0 ch\u01b0a g\u1eafn kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng v\u1edbi c\u00e1c c\u1ea5p \u0111\u1ea5t c\u1ee5 th\u1ec3 n\u00ean kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng ch\u01b0a cao.<\/p>\n

Xu\u1ea5t ph\u00e1t t\u1eeb th\u1ef1c ti\u1ec5n \u0111\u00f3, \u0111\u1ec1 t\u00e0i: “Nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 v\u00e0 gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a m\u1ed9t s\u1ed1 d\u1ea1ng r\u1eebng tr\u1ed3ng ch\u1ee7 y\u1ebfu \u1edf Vi\u1ec7t Nam<\/i>” \u0111\u1eb7t ra l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft nh\u1eb1m g\u00f3p ph\u1ea7n cung c\u1ea5p th\u00eam nh\u1eefng th\u00f4ng tin, s\u1ed1 li\u1ec7u v\u1ec1 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a m\u1ed9t s\u1ed1 d\u1ea1ng r\u1eebng tr\u1ed3ng, l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c \u0111\u1ecbnh gi\u00e1 r\u1eebng v\u00e0 lu\u1eadn c\u1ee9 cho vi\u1ec7c chi tr\u1ea3 d\u1ecbch v\u1ee5 m\u00f4i tr\u01b0\u1eddng r\u1eebng \u1edf n\u01b0\u1edbc ta.<\/p>\n

II. N\u1ed8I DUNG V\u00c0 PH\u01af\u01a0NG PH\u00c1P NGHI\u00caN C\u1ee8U<\/b><\/p>\n

2.1. N\u1ed9i dung nghi\u00ean c\u1ee9u<\/b><\/p>\n

– Nghi\u00ean c\u1ee9u sinh kh\u1ed1i v\u00e0 m\u1ed1i li\u00ean h\u1ec7 c\u1ee7a sinh kh\u1ed1i v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra ch\u1ee7 y\u1ebfu.<\/p>\n

– X\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng.<\/p>\n

– X\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng.<\/p>\n

– X\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m d\u1ef1 b\u00e1o l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 v\u00e0 gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng theo tu\u1ed5i, c\u1ea5p \u0111\u1ea5t v\u00e0 m\u1eadt \u0111\u1ed9 ho\u1eb7c d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n.<\/p>\n

2.2. Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/b><\/p>\n

\u00a0\u00a0 * K\u1ebf th\u1eeba t\u00e0i li\u1ec7u: <\/i><\/b>K\u1ebf th\u1eeba c\u00e1c t\u00e0i li\u1ec7u, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 c\u00f3 v\u1ec1 8 lo\u1ea1i r\u1eebng tr\u1ed3ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 bi\u1ec3u \u0111i\u1ec1u tra kinh doanh r\u1eebng c\u1ee7a 14 lo\u00e0i c\u00e2y ch\u1ee7 y\u1ebfu,\u2026; c\u00e1c t\u00e0i li\u1ec7u li\u00ean quan \u0111\u1ebfn ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh sinh kh\u1ed1i, l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 c\u1ee7a r\u1eebng, c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a r\u1eebng,…<\/p>\n

* Ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra th\u1ef1c \u0111\u1ecba<\/b><\/p>\n

– M\u1ed7i d\u1ea1ng r\u1eebng tr\u1ed3ng b\u1ed1 tr\u00ed 12 \u00d4TC di\u1ec7n t\u00edch 1000 m2<\/sup> (40mx25m) (c\u00f2n g\u1ecdi l\u00e0 \u00f4 s\u01a1 c\u1ea5p) tr\u00ean 1 c\u1ea5p \u0111\u1ea5t, t\u1ed5ng s\u1ed1 \u00d4TC cho m\u1ed9t lo\u00e0i l\u00e0 48 \u00d4TC. C\u00e1c \u00d4TC \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed r\u1ea3i \u0111\u1ec1u \u1edf c\u00e1c c\u1ea5p tu\u1ed5i kh\u00e1c nhau, trong \u0111\u00f3 c\u00f3 2 \u00d4TC kh\u00f4ng tham gia v\u00e0o t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra c\u00e1c m\u00f4 h\u00ecnh d\u1ef1 b\u00e1o. Tr\u00ean m\u1ed7i \u00d4TC s\u01a1 c\u1ea5p l\u1eadp 5 \u00f4 th\u1ee9 c\u1ea5p (4 \u00f4 \u1edf 4 g\u00f3c v\u00e0 1 \u00f4 \u1edf gi\u1eefa \u00d4TC) di\u1ec7n t\u00edch 25 m2<\/sup> (5m x 5 m) \u0111\u1ec3 \u0111i\u1ec1u tra c\u00e2y b\u1ee5i, th\u1ea3m t\u01b0\u01a1i. \u1ede trung t\u00e2m m\u1ed7i \u00f4 th\u1ee9 c\u1ea5p l\u1eadp 1 \u00f4 d\u1ea1ng b\u1ea3n di\u1ec7n t\u00edch 1 m2<\/sup> \u0111\u1ec3 \u0111i\u1ec1u tra v\u1eadt r\u01a1i r\u1ee5ng.<\/p>\n

– Ti\u1ebfn h\u00e0nh \u0111i\u1ec1u tra c\u00e1c ch\u1ec9 ti\u00eau: D1,3<\/sub>, Hvn<\/sub>, Dt<\/sub>, Hdc<\/sub> c\u1ee7a to\u00e0n b\u1ed9 c\u00e1c c\u00e2y trong OTC.<\/p>\n

– X\u00e1c \u0111\u1ecbnh c\u1ea5p \u0111\u1ea5t: C\u1ea5p \u0111\u1ea5t c\u00e1c lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a v\u00e0o bi\u1ec3u c\u1ea5p \u0111\u1ea5t th\u00f4ng qua tu\u1ed5i v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n t\u1ea7ng tr\u1ed9i (Hdom<\/sub>) c\u1ee7a c\u00e1c c\u00e2y trong l\u00e2m ph\u1ea7n.<\/p>\n

– M\u1ed7i OTC ch\u1ecdn 2 c\u00e2y ti\u00eau chu\u1ea9n \u0111\u1ec3 ch\u1eb7t h\u1ea1, sinh kh\u00f4\u0301i c\u00e2y \u0111\u01b0\u01a1\u0323c ph\u00e2n th\u00e0nh c\u00e1c b\u1ed9 ph\u1eadn: l\u00e1, c\u00e0nh, th\u00e2n; \u0111\u00e0o v\u00e0 l\u1ea5y to\u00e0n b\u1ed9 r\u1ec5 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 2 mm. C\u00e2n c\u00e1c b\u1ed9 ph\u1eadn ngay t\u1ea1i ch\u1ed7 \u0111\u01b0\u1ee3c sinh kh\u1ed1i t\u01b0\u01a1i c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn c\u00e2y. L\u1ea5y m\u1eabu t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ph\u1eadn, \u0111em v\u1ec1 s\u00e2\u0301y kh\u00f4 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh sinh kh\u1ed1i kh\u00f4 v\u00e0 ph\u00e2n t\u00edch trong ph\u00f2ng th\u00ed nghi\u1ec7m.<\/p>\n

– Trong c\u00e1c \u00f4 th\u1ee9 c\u1ea5p, ti\u1ebfn h\u00e0nh ch\u1eb7t v\u00e0 thu th\u1eadp c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i r\u1ed3i chia th\u00e0nh 3 ph\u1ea7n: th\u1ea3m t\u01b0\u01a1i; th\u00e2n, c\u00e0nh, l\u00e1 va\u0300 r\u1ec5 c\u00e2y b\u1ee5i. C\u00e1c ph\u1ea7n n\u00e0y \u0111\u01b0\u1ee3c c\u00e2n t\u01b0\u01a1i ngay t\u1ea1i r\u1eebng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh sinh kh\u1ed1i t\u01b0\u01a1i. L\u1ea5y m\u1eabu c\u00e1c b\u1ed9 ph\u1eadn \u0111em v\u1ec1 ph\u00e2n t\u00edch trong ph\u00f2ng.<\/p>\n

– Trong m\u1ed7i \u00f4 d\u1ea1ng b\u1ea3n, ti\u1ebfn h\u00e0nh thu th\u1eadp sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng. C\u00e2n ngay c\u00e1c b\u1ed9 ph\u1eadn t\u1ea1i r\u1eebng v\u00e0 l\u1ea5y m\u1eabu \u0111em v\u1ec1 ph\u00e2n t\u00edch trong ph\u00f2ng th\u00ed nghi\u1ec7m.<\/p>\n

– L\u1ea5y m\u1eabu ph\u00e2n t\u00edch \u0111\u1ea5t: V\u1edbi m\u1ed7i \u00d4TC l\u1ea5y 3 m\u1eabu \u0111\u1ea5t t\u1ed5ng h\u1ee3p t\u1eeb 9 \u0111i\u1ec3m ng\u1eabu nhi\u00ean b\u0103\u0300ng khoan \u1edf c\u00e1c \u0111\u1ed9 s\u00e2u 0 – 10 cm, 10 – 20 cm, 20 – 30 cm \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng carbon t\u00edch l\u0169y trong \u0111\u1ea5t d\u01b0\u1edbi t\u00e1n r\u1eebng; m\u00f4\u0303i t\u00e2\u0300ng l\u1ea5y 1 m\u1eabu \u0111\u1ea5t.<\/p>\n

\u00a0\u00a0\u00a0\u00a0 * Ph\u00e2n t\u00edch v\u00e0 x\u1eed l\u00fd s\u1ed1 li\u1ec7u<\/i><\/b><\/p>\n

– C\u00e1c s\u1ed1 li\u1ec7u thu th\u1eadp \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng c\u00e1c h\u00e0m th\u1ed1ng k\u00ea to\u00e1n h\u1ecdc tr\u00ean ph\u1ea7m m\u1ec1m excel 5.0 v\u00e0 SPSS 13.0. C\u00e1c m\u1eabu sinh kh\u1ed1i t\u1ea7ng c\u00e2y cao, sinh kh\u1ed1i c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i, sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng, m\u1eabu \u0111\u1ea5t \u0111\u01b0\u1ee3c s\u1ea5y v\u00e0 ph\u00e2n t\u00edch h\u00e0m l\u01b0\u1ee3ng carbon b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p chuy\u00ean d\u1ee5ng trong ph\u00f2ng th\u00ed nghi\u1ec7m.<\/p>\n

– M\u1ed1i quan h\u1ec7 gi\u1eefa sinh kh\u1ed1i, kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng b\u1eb1ng ph\u1ea7n m\u1ec1m th\u1ed1ng k\u00ea th\u00f4ng d\u1ee5ng SPSS 13.0. L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan cao nh\u1ea5t v\u00e0 sai s\u1ed1 b\u00e9 nh\u1ea5t, d\u1ec5 \u00e1p d\u1ee5ng nh\u1ea5t. M\u1ed7i lo\u00e0i d\u00f9ng 2 \u00d4TC kh\u00f4ng tham gia t\u00ednh to\u00e1n \u0111\u1ec3 ki\u1ec3m tra v\u00e0 hi\u1ec7u ch\u1ec9nh c\u00e1c m\u00f4 h\u00ecnh. Sai s\u00f4\u0301 ch\u00e2\u0301p nh\u00e2\u0323n <10%.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 – <\/i>D\u1ef1a v\u00e0o c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u01a1\u0323ng carbon h\u00e2\u0301p thu\u0323 v\u01a1\u0301i ca\u0301c nh\u00e2n t\u00f4\u0301 \u0111i\u00ea\u0300u tra D1,3<\/sub>, Hvn, tu\u1ed5i,… l\u00e2\u0323p \u0111\u01b0\u01a1\u0323c \u0111\u1ec3 x\u00e2y d\u1ef1ng tra l\u01b0\u01a1\u0323ng carbon h\u00e2\u0301p thu\u0323 cu\u0309a r\u01b0\u0300ng tr\u00ean c\u01a1 s\u01a1\u0309 ga\u0301n cho ca\u0301c bi\u00ea\u0301n s\u00f4\u0301 \u0111\u00f4\u0323c l\u00e2\u0323p nh\u01b0\u0303ng gia\u0301 tri\u0323 cu\u0323 th\u00ea\u0309.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0– Ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon: <\/i><\/p>\n

Gia\u0301 tri\u0323 th\u01b0\u01a1ng ma\u0323i C = L\u01b0\u1ee3ng CO2 <\/sub>t\u01b0\u01a1ng \u0111\u01b0\u01a1ng (t\u1ea5n\/ha) x gi\u00e1 (USD\/t\u1ea5n C02<\/sub>).<\/p>\n

Gi\u00e1 b\u00e1n carbon ta\u0323i Vi\u00ea\u0323t Nam \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh t\u1ea1i th\u1eddi \u0111i\u1ec3m nghi\u00ean c\u1ee9u theo th\u1ecb tr\u01b0\u1eddng th\u1ebf gi\u1edbi, \u0111\u00ea\u0300 ta\u0300i a\u0301p du\u0323ng la\u0300 5 USD\/t\u00e2\u0301n CO2<\/sub> t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n

III. K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U V\u00c0 TH\u1ea2O LU\u1eacN<\/b><\/p>\n

3.1. K\u1ebft qu\u1ea3 <\/b>nghi\u00ean c\u1ee9u sinh kh\u1ed1i v\u00e0 m\u1ed1i li\u00ean h\u1ec7 c\u1ee7a sinh kh\u1ed1i v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra ch\u1ee7 y\u1ebfu<\/b><\/p>\n

\u00a0\u00a0 \u00a03.1.1<\/i>. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u sinh kh\u1ed1i 8 d\u1ea1ng r\u1eebng tr\u1ed3ng<\/i><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a. Sinh kh\u1ed1i r\u1eebng Th\u00f4ng m\u00e3 v\u0129: <\/i>C\u1ea5u tr\u00fac sinh kh\u1ed1i r\u1eebng tr\u1ed3ng th\u00f4ng m\u00e3 v\u0129 ch\u1ee7 y\u1ebfu t\u1eadp trung \u1edf t\u1ea7ng c\u00e2y g\u1ed7, chi\u1ebfm 85,77%; c\u00e2y b\u1ee5i, th\u1ea3m t\u01b0\u01a1i chi\u1ebfm 9,64% v\u00e0 sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm 4,59%. T\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n trung b\u00ecnh \u1edf c\u1ea5p \u0111\u1ea5t I l\u00e0 159,23 t\u1ea5n\/ha; \u1edf c\u1ea5p \u0111\u1ea5t II l\u00e0 120,89 t\u1ea5n\/ha v\u00e0 \u1edf c\u1ea5p \u0111\u1ea5t III l\u00e0 103,16 t\u1ea5n\/ha.<\/p>\n

b. <\/i>Sinh kh\u1ed1i r\u1eebng Th\u00f4ng nh\u1ef1a: <\/i>T\u1ed5ng sinh kh\u1ed1i t\u1ea7ng c\u00e2y g\u1ed7 chi\u1ebfm 84,45%; sinh kh\u1ed1i c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i l\u00e0 8,69%; sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm 6,86%. \u1ede giai \u0111o\u1ea1n tu\u1ed5i 5 – 30, t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n dao \u0111\u1ed9ng t\u1eeb 34,98 – 193,52 t\u1ea5n\/ha \u1edf c\u1ea5p \u0111\u1ea5t I; 29,28 – 166,09 t\u1ea5n\/ha \u1edf c\u1ea5p \u0111\u1ea5t II v\u00e0 20,79 – 144,41 t\u1ea5n\/ha \u1edf c\u1ea5p \u0111\u1ea5t III. Ri\u00eang \u1edf c\u1ea5p \u0111\u1ea5t III c\u00f3 m\u1ed9t s\u1ed1 l\u00e2m ph\u1ea7n \u1edf c\u00e1c tu\u1ed5i 35, 40, 45 nh\u01b0ng \u1edf c\u00e1c tu\u1ed5i n\u00e0y m\u1eadt \u0111\u1ed9 c\u00f2n l\u1ea1i kh\u00e1 th\u1ea5p, ch\u1ec9 t\u1eeb 364 – 480 c\u00e2y\/ha v\u1edbi t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n dao \u0111\u1ed9ng t\u1eeb 131,33 – 146,67 t\u1ea5n\/ha.<\/p>\n

c. Sinh kh\u1ed1i r\u1eebng Keo lai: <\/i>Sinh kh\u1ed1i t\u1eadp trung ch\u1ee7 y\u1ebfu \u01a1\u0309 t\u1ea7ng c\u00e2y g\u1ed7, chi\u1ebfm 76,5%, v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm 14,5% v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i chi\u1ebfm 9,0%. T\u1ed5ng sinh kh\u1ed1i kh\u00f4 l\u00e2m ph\u1ea7n c\u1ee5 th\u1ec3 tr\u00ean t\u1eebng c\u1ea5p \u0111\u1ea5t nh\u01b0 sau: C\u1ea5p \u0111\u1ea5t I dao \u0111\u1ed9ng t\u1eeb 8,85 – 138,13 t\u1ea5n\/\/ha; c\u1ea5p \u0111\u1ea5t II t\u1eeb 9,64 – 93,29 t\u1ea5n\/ha; c\u1ea5p \u0111\u1ea5t III t\u1eeb 4,09 – 76,52 t\u1ea5n\/ha v\u00e0 \u1edf c\u1ea5p \u0111\u1ea5t IV t\u1eeb 7,67 – 50,09 t\u1ea5n\/ha.<\/p>\n

d. <\/i>S<\/i>inh kh\u1ed1i <\/i>r\u1eebng <\/i>B\u1ea1ch \u0111\u00e0n urophylla<\/i>: <\/i>Sinh kh\u1ed1i l\u00e2m ph\u00e2\u0300n t\u1eadp trung chu\u0309 y\u00ea\u0301u \u01a1\u0309 t\u1ea7ng c\u00e2y g\u1ed7, chi\u1ebfm 76,35%, v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm 16,92% v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i chi\u1ebfm 6,74%. C\u1ea5p \u0111\u1ea5t I, t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n t\u1eeb 10,01 – 117,92 t\u1ea5n\/ha; c\u1ea5p \u0111\u1ea5t II\u00a0: t\u1eeb 6,44 – 78,21 t\u1ea5n\/ha; c\u1ea5p \u0111\u1ea5t III: t\u1eeb 5,67 – 64,66 t\u1ea5n\/ha v\u00e0 \u1edf c\u1ea5p \u0111\u1ea5t IV:\u00a0t\u1eeb 6,42 –\u00a0 49,52 t\u1ea5n\/ha.<\/p>\n

e. Sinh kh\u1ed1i r\u1eebng M\u1ee1: <\/i>T\u1ed5ng sinh kh\u1ed1i r\u1eebng tr\u1ed3ng M\u1ee1 thu\u1ea7n lo\u00e0i ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o t\u1ea7ng c\u00e2y g\u1ed7, chi\u1ebfm 87,64%; c\u00e2y b\u1ee5i, th\u1ea3m t\u01b0\u01a1i 3,50% v\u00e0 v\u1eadt r\u01a1i r\u1ee5ng 8,86%. C\u1ea5p \u0111\u1ea5t I c\u00f3 t\u1ed5ng sinh kh\u1ed1i l\u1edbn nh\u1ea5t, sau \u0111\u00f3 \u0111\u1ebfn c\u1ea5p \u0111\u1ea5t II v\u00e0 c\u1ea5p \u0111\u1ea5t III.<\/p>\n

f. <\/i>Sinh kh\u1ed1i r\u1eebng Keo l\u00e1 tr\u00e0m: <\/i>Sinh kh\u1ed1i r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m t\u1eadp trung v\u00e0o t\u1ea7ng c\u00e2y g\u1ed7, chi\u1ebfm trung b\u00ecnh 76,35%, v\u1eadt r\u01a1i r\u1ee5ng 16,92% v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 6,74%. Trong c\u00f9ng m\u1ed9t tu\u1ed5i, t\u1ed5ng sinh kh\u1ed1i to\u00e0n l\u00e2m ph\u1ea7n c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m d\u1ea7n theo c\u1ea5p \u0111\u1ea5t, t\u1eeb c\u1ea5p \u0111\u1ea5t t\u1ed1t \u0111\u1ebfn c\u1ea5p \u0111\u1ea5t x\u1ea5u (I>II>III>IV).<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 g. Sinh kh\u1ed1i r\u1eebng Th\u00f4ng ba l\u00e1: <\/i>T\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n t\u1eadp trung v\u00e0o t\u1ea7ng c\u00e2y g\u1ed7 chi\u1ebfm chi\u00ea\u0301m 85,97%; c\u00e2y b\u1ee5i, th\u1ea3m t\u01b0\u01a1i chi\u1ebfm 3,98% v\u00e0 v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm 10,05%. T\u00ednh chung cho c\u00e1c c\u1ea5p tu\u1ed5i t\u1eeb tu\u1ed5i 5 \u0111\u1ebfn 25, t\u1ed5ng sinh kh\u1ed1i c\u1ee7a l\u00e2m ph\u1ea7n \u1edf \u0111\u1ea5t c\u1ea5p II b\u1eb1ng 77% t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n \u1edf \u0111\u1ea5t c\u1ea5p I; t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n c\u1ee7a \u0111\u1ea5t c\u1ea5p III b\u1eb1ng 50%, sinh kh\u1ed1i \u1edf c\u1ea5p \u0111\u1ea5t IV b\u1eb1ng 31% v\u00e0 sinh kh\u1ed1i \u1edf c\u1ea5p \u0111\u1ea5t V ch\u1ec9 b\u1eb1ng 22% sinh kh\u1ed1i \u1edf c\u1ea5p \u0111\u1ea5t I.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 h. Sinh kh\u1ed1i r\u1eebng Keo tai t\u01b0\u1ee3ng: <\/i>Sinh kh\u00f4\u0301i t\u00e2\u0300ng c\u00e2y g\u00f4\u0303 chi\u00ea\u0301m ty\u0309 tro\u0323ng l\u01a1\u0301n nh\u00e2\u0301t, trung bi\u0300nh 79,91%, v\u00e2\u0323t r\u01a1i ru\u0323ng chi\u00ea\u0301m 12,14%, th\u00e2\u0301p nh\u00e2\u0301t la\u0300 c\u00e2y bu\u0323i tha\u0309m t\u01b0\u01a1i chi\u00ea\u0301m 7,95%. T\u00f4\u0309ng sinh kh\u00f4\u0301i toa\u0300n l\u00e2m ph\u00e2\u0300n Keo tai t\u01b0\u01a1\u0323ng bi\u00ea\u0301n \u0111\u00f4\u0323ng ma\u0323nh theo ca\u0301c c\u00e2\u0301p \u0111\u00e2\u0301t.\u00a0\u00a0 \u00a0<\/i><\/b><\/p>\n

\u00a0\u00a0 3.1.2<\/i><\/b>. M\u1ed1i quan h\u1ec7 gi\u1eefa sinh kh\u1ed1i 8 d\u1ea1ng r\u1eebng tr\u1ed3ng v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra <\/i><\/b><\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, \u0111\u1ed1i v\u1edbi c\u1ea3 8 d\u1ea1ng r\u1eebng tr\u1ed3ng thu\u1ea7n lo\u00e0i th\u00ec gi\u1eefa t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra D1.3<\/sub>; Hvn<\/sub>; N; A c\u00f3 m\u1ed1i li\u00ean h\u1ec7 ch\u1eb7t ch\u1ebd v\u1edbi nhau. C\u00e1c ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng quan l\u1eadp \u0111\u01b0\u1ee3c \u0111\u1ec1u c\u00f3 h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan \u1edf m\u1ee9c ch\u1eb7t \u0111\u1ebfn r\u1ea5t ch\u1eb7t, sai ti\u00eau chu\u1ea9n c\u1ee7a c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh th\u1ea5p. S\u01b0\u0309 du\u0323ng ca\u0301c \u00d4TC kh\u00f4ng tham gia ti\u0301nh toa\u0301n \u0111\u00ea\u0309 ki\u00ea\u0309m tra cho sai s\u00f4\u0301 <10%. Do \u0111\u00f3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nhanh sinh kh\u1ed1i c\u1ee7a t\u1eebng lo\u1ea1i r\u1eebng tr\u1ed3ng theo t\u1eebng c\u1ea5p \u0111\u1ea5t ho\u1eb7c chung cho c\u00e1c c\u1ea5p \u0111\u1ea5t d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra d\u1ec5 \u0111o \u0111\u1ebfm.<\/p>\n

3.2. K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng<\/b><\/p>\n

\u00a0\u00a0 3.2.1. K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh t\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng<\/b><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b>a. R\u1eebng tr\u1ed3ng Th\u00f4ng m\u00e3 v\u0129<\/p>\n

– C\u1ea5u tr\u00fac l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong r\u1eebng tr\u1ed3ng Th\u00f4ng m\u00e3 v\u0129 ch\u1ee7 y\u1ebfu t\u1eadp trung trong t\u1ea7ng c\u00e2y g\u1ed7 chi\u1ebfm trung b\u00ecnh 58,54% v\u00e0 trong \u0111\u1ea5t r\u1eebng 32,83%, ti\u1ebfp \u0111\u00ea\u0301n l\u00e0 trong v\u1eadt r\u01a1i r\u1ee5ng trung b\u00ecnh 5,20% v\u00e0 trong c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 2,43%.<\/p>\n

– T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 tr\u00ean m\u1ed9t ha r\u1eebng tr\u1ed3ng Th\u00f4ng m\u00e3 v\u0129 dao \u0111\u1ed9ng t\u1eeb 33,32 – 179,41 t\u1ea5n\/ha. T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 \u1edf c\u1ea5p \u0111\u1ea5t I t\u1eeb 42,30 – 179,41 t\u1ea5n\/ha \u1ee9ng v\u1edbi tu\u1ed5i t\u1eeb 5 \u0111\u1ebfn 30; \u01a1\u0309 c\u1ea5p \u0111\u1ea5t II: dao \u0111\u1ed9ng t\u1eeb 37,04 – 168,50 t\u1ea5n\/ha; c\u1ea5p \u0111\u1ea5t III: dao \u0111\u1ed9ng t\u1eeb 33,32 – 149,13 t\u1ea5n\/ha. T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i dao \u0111\u1ed9ng t\u1eeb 0,7 – 3,71 t\u1ea5n\/ha (trung b\u00ecnh 1,83 t\u1ea5n\/ha). Ti\u0301nh trung bi\u0300nh l\u01b0\u01a1\u0323ng carbon trong v\u00e2\u0323t r\u01a1i ru\u0323ng \u01a1\u0309 c\u00e2\u0301p \u0111\u00e2\u0301t I la\u0300 3,79 t\u00e2\u0301n\/ha; \u01a1\u0309 c\u00e2\u0301p \u0111\u00e2\u0301t II la\u0300 3,57 t\u00e2\u0301n\/ha va\u0300 \u01a1\u0309 c\u00e2\u0301p \u0111\u00e2\u0301t III la\u0300 3,27 t\u00e2\u0301n\/ha. L\u01b0\u1ee3ng carbon trong \u0111\u1ea5t r\u1eebng dao \u0111\u00f4\u0323ng trong khoa\u0309ng 20-30 t\u00e2\u0301n\/ha.<\/p>\n

b. R\u1eebng tr\u1ed3ng Th\u00f4ng nh\u1ef1a:<\/i><\/p>\n

– L\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 ch\u1ee7 y\u1ebfu t\u1eadp trung trong t\u1ea7ng c\u00e2y g\u1ed7 chi\u1ebfm 48,17% v\u00e0 trong \u0111\u1ea5t r\u1eebng chi\u1ebfm 45,64%, c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 3,23% v\u00e0 v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm 3,01%.<\/p>\n

– T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 tr\u00ean m\u1ed9t ha r\u1eebng tr\u1ed3ng Th\u00f4ng nh\u1ef1a dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 51,37 – 158,38 t\u1ea5n\/ha v\u00e0 c\u00f3 xu h\u01b0\u1edbng t\u0103ng d\u1ea7n theo tu\u1ed5i tr\u00ean c\u00f9ng m\u1ed9t c\u1ea5p \u0111\u1ea5t. Trong c\u00f9ng m\u1ed9t c\u1ea5p tu\u1ed5i, t\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong to\u00e0n l\u00e2m ph\u1ea7n \u1edf c\u00e1c c\u1ea5p \u0111\u1ea5t kh\u00e1c nhau c\u0169ng r\u1ea5t kh\u00e1c nhau. V\u00ed d\u1ee5 c\u00f9ng m\u1ed9t tu\u1ed5i 20, \u1edf c\u1ea5p \u0111\u1ea5t I: t\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 l\u00e0 157,21 t\u1ea5n\/ha, \u1edf c\u1ea5p \u0111\u1ea5t II l\u00e0 122,71 t\u1ea5n\/ha v\u00e0 gi\u00e1 tr\u1ecb n\u00e0y c\u00f2n th\u1ea5p h\u01a1n \u1edf c\u1ea5p \u0111\u1ea5t III l\u00e0 95,29 t\u1ea5n\/ha. L\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong t\u1ea7ng c\u00e2y g\u1ed7 dao \u0111\u1ed9ng t\u1eeb 4,37 – 109,25 t\u1ea5n\/ha; c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i t\u1eeb 0,55 – 5,99 t\u1ea5n\/ha, trung b\u00ecnh l\u00e0 2,32 t\u1ea5n\/ha; v\u1eadt r\u01a1i r\u1ee5ng 1,49 – 4,63 t\u1ea5n\/ha; trong \u0111\u1ea5t r\u1eebng chi\u1ebfm 39,53 – 47,39 t\u1ea5n\/ha, trung b\u00ecnh l\u00e0 42,71 t\u1ea5n\/ha.<\/p>\n

c. R\u1eebng tr\u1ed3ng Keo lai<\/i><\/p>\n

– C\u1ea5u tr\u00fac l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong r\u1eebng tr\u1ed3ng Keo lai ch\u1ee7 y\u1ebfu t\u1eadp trung trong \u0111\u1ea5t: trung b\u00ecnh chi\u1ebfm 67,74% v\u00e0 trong t\u1ea7ng c\u00e2y g\u1ed7 27,51%, ti\u1ebfp theo l\u00e0 v\u1eadt r\u01a1i r\u1ee5ng 3,18% v\u00e0 c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 1,54%.<\/p>\n

– T\u1ed5ng l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 tr\u00ean m\u1ed9t ha r\u1eebng tr\u1ed3ng Keo lai dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 43,85 – 108,82 t\u1ea5n\/ha. C\u1ea5p \u0111\u1ea5t I: T\u1ed5ng l\u01b0\u1ee3ng carbon trong l\u00e2m ph\u1ea7n dao \u0111\u1ed9ng t\u1eeb 50,76 – 108,82 t\u1ea5n\/ha \u1ee9ng v\u1edbi tu\u1ed5i t\u1eeb 1 \u0111\u1ebfn 7; C\u1ea5p \u0111\u1ea5t II l\u01b0\u1ee3ng carbon dao \u0111\u1ed9ng t\u1eeb 48,97 – 91,04 t\u1ea5n\/ha; C\u1ea5p \u0111\u1ea5t III l\u01b0\u1ee3ng carbon dao \u0111\u1ed9ng t\u1eeb 45,94 – 82,85 t\u1ea5n\/ha; C\u1ea5p \u0111\u1ea5t IV l\u01b0\u1ee3ng carbon dao \u0111\u1ed9ng t\u1eeb 43,85 – 68,35 t\u1ea5n\/ha. L\u01b0\u1ee3ng carbon trong t\u1ea7ng c\u00e2y g\u1ed7 dao \u0111\u1ed9ng t\u1eeb 0,5 – 64,7 t\u1ea5n\/ha; c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 0,21 – 2,31 t\u1ea5n\/ha; trong \u0111\u1ea5t r\u1eebng dao \u0111\u1ed9ng trong kho\u1ea3ng 39,78 – 47,60 t\u1ea5n\/ha.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 d. R\u1eebng tr\u1ed3ng B\u1ea1ch \u0111\u00e0n Urophylla<\/i><\/p>\n

C\u1ea5u tr\u00fac l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong r\u1eebng tr\u1ed3ng B\u1ea1ch \u0111\u00e0n urophylla ch\u1ee7 y\u1ebfu t\u1eadp trung trong \u0111\u1ea5t r\u1eebng: chi\u1ebfm trung b\u00ecnh l\u00e0 63,66 %; t\u1ea7ng c\u00e2y g\u1ed7 31,03%; v\u1eadt r\u01a1i r\u1ee5ng 3,56%; c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i ch\u1ec9 chi\u1ebfm 1,75%. T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 tr\u00ean m\u1ed9t ha r\u1eebng tr\u1ed3ng B\u1ea1ch \u0111\u00e0n urophylla dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 35,50 – 95,64 t\u1ea5n\/ha (trung b\u00ecnh l\u00e0 58,72 t\u1ea5n\/ha). L\u01b0\u1ee3ng carbon trong t\u1ea7ng c\u00e2y g\u1ed7 dao \u0111\u1ed9ng 0,58 – 58,13 t\u1ea5n\/ha; c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 0,34 – 1,99 t\u1ea5n\/ha; v\u1eadt r\u01a1i r\u1ee5ng dao \u0111\u1ed9ng t\u1eeb 1,07 – 5,66 t\u1ea5n\/ha; trong \u0111\u1ea5t r\u1eebng dao \u0111\u1ed9ng trong kho\u1ea3ng 31,37 – 38,52 t\u1ea5n\/ha.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 e. R\u1eebng tr\u1ed3ng M\u1ee1<\/i><\/p>\n

C\u1ea5u tr\u00fac l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong r\u1eebng M\u1ee1 ch\u1ee7 y\u1ebfu t\u1eadp trung trong \u0111\u1ea5t r\u1eebng trung b\u00ecnh 45,95% v\u00e0 trong t\u1ea7ng c\u00e2y g\u1ed7 l\u00e0 45,09%, ti\u1ebfp \u0111\u00ea\u0301n l\u00e0 v\u1eadt r\u01a1i r\u1ee5ng 3,58% v\u00e0 c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 1,38%. T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 tr\u00ean m\u1ed9t ha r\u1eebng tr\u1ed3ng M\u1ee1 dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 55,93 – 112,40 t\u1ea5n\/ha. T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 thay \u0111\u1ed5i theo c\u1ea5p \u0111\u1ea5t, \u1edf c\u1ea5p \u0111\u1ea5t I t\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 dao \u0111\u1ed9ng t\u1eeb 58,44 – 112,40 t\u1ea5n\/ha \u1ee9ng v\u1edbi tu\u1ed5i t\u1eeb 6 \u0111\u1ebfn 16; \u01a1\u0309 c\u1ea5p \u0111\u1ea5t II t\u1eeb 57,38 – 83,39 t\u1ea5n\/ha \u1ee9ng v\u1edbi tu\u1ed5i t\u1eeb 8 \u0111\u1ebfn 14; \u1edf c\u1ea5p \u0111\u1ea5t III t\u1eeb 55,93 – 77,92 t\u1ea5n\/ha \u1ee9ng v\u1edbi tu\u1ed5i t\u1eeb 8 \u0111\u1ebfn 14; c\u1ea5p \u0111\u1ea5t IV dao \u0111\u1ed9ng t\u1eeb 56,26 – 61,03 t\u1ea5n\/ha \u1ee9ng v\u1edbi tu\u1ed5i t\u1eeb 10 \u0111\u1ebfn 18.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 f. R\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m<\/i><\/p>\n

C\u1ea5u tr\u00fac l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m ch\u1ee7 y\u1ebfu t\u1eadp trung trong \u0111\u1ea5t r\u1eebng: chi\u1ebfm 55,99%; t\u1ea7ng c\u00e2y g\u1ed7 l\u00e0 35,16 %; c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i 6,41%; th\u1ea5p nh\u1ea5t l\u00e0 v\u1eadt r\u01a1i r\u1ee5ng ch\u1ec9 chi\u1ebfm 2,44%. L\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong t\u1ea7ng c\u00e2y g\u1ed7 dao \u0111\u1ed9ng kh\u00e1 m\u1ea1nh theo c\u00e1c c\u1ea5p \u0111\u1ea5t, tu\u1ed5i v\u00e0 m\u1eadt \u0111\u1ed9 kh\u00e1c nhau, t\u1eeb 1,03 – 59,36 t\u1ea5n\/ha; c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i dao \u0111\u1ed9ng t\u1eeb 1,58 – 5,96 t\u1ea5n\/ha; v\u1eadt r\u01a1i r\u1ee5ng dao \u0111\u1ed9ng t\u1eeb 0,46 – 2,55 t\u1ea5n\/ha; trong \u0111\u1ea5t r\u1eebng dao \u0111\u1ed9ng t\u1eeb 23,17 – 30,77 t\u1ea5n\/ha. T\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 trong 1ha r\u1eebng tr\u1ed3ng Keo l\u00e1 tr\u00e0m dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 27,05 – 87,68 t\u1ea5n\/ha (trung b\u00ecnh l\u00e0 51,91 t\u1ea5n\/ha).<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 g. R\u1eebng tr\u1ed3ng Th\u00f4ng ba l\u00e1: <\/i>L\u01b0\u01a1\u0323ng carbon h\u00e2\u0301p thu\u0323 l\u00e2m ph\u00e2\u0300n Th\u00f4ng ba la\u0301 t\u00e2\u0323p trung chu\u0309 y\u00ea\u0301u va\u0300o t\u00e2\u0300ng c\u00e2y g\u00f4\u0303, chi\u00ea\u0301m t\u01a1\u0301i 62,67%; ti\u00ea\u0301p \u0111\u00ea\u0301n la\u0300 trong \u0111\u00e2\u0301t r\u01b0\u0300ng chi\u00ea\u0301m 29,75%; v\u00e2\u0323t r\u01a1i ru\u0323ng chi\u00ea\u0301m 5,87%; th\u00e2\u0301p nh\u00e2\u0301t la\u0300 l\u01b0\u01a1\u0323ng carbon trong c\u00e2y bu\u0323i tha\u0309m t\u01b0\u01a1i, chi\u0309 chi\u00ea\u0301m 2,11%.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 h. R\u1eebng tr\u1ed3ng Keo tai t\u01b0\u1ee3ng: <\/i>L\u01b0\u01a1\u0323ng carbon h\u00e2\u0301p thu\u0323 trong l\u00e2m ph\u00e2\u0300n Keo tai t\u01b0\u01a1\u0323ng bi\u00ea\u0301n \u0111\u00f4\u0323ng kha\u0301 ma\u0323nh (68,19 t\u00e2\u0301n\/ha – 120,94 t\u00e2\u0301n\/ha) va\u0300 phu\u0323 thu\u00f4\u0323c nhi\u00ea\u0300u va\u0300o c\u00e2\u0301p \u0111\u00e2\u0301t. L\u01b0\u01a1\u0323ng carbon nhi\u00ea\u0300u nh\u00e2\u0301t la\u0300 \u01a1\u0309 trong \u0111\u00e2\u0301t r\u01b0\u0300ng trung bi\u0300nh chi\u00ea\u0301m 44,47%, ti\u00ea\u0301p \u0111\u00ea\u0301n la\u0300 t\u00e2\u0300ng c\u00e2y g\u00f4\u0303 chi\u00ea\u0301m 41,41%, v\u00e2\u0323t r\u01a1i ru\u0323ng chi\u00ea\u0301m 5,98%; th\u00e2\u0301p nh\u00e2\u0301t la\u0300 c\u00e2y bu\u0323i tha\u0309m t\u01b0\u01a1i chi\u00ea\u0301m 3,74%.<\/p>\n

\u00a0\u00a0\u00a0 3.2.2. K\u1ebft qu\u1ea3 x\u00e2y d\u1ef1ng m\u1ed1i quan h\u1ec7 gi\u1eefa l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 c\u1ee7a l\u00e2m ph\u1ea7n v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra<\/i><\/b><\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y, \u0111\u1ed1i v\u1edbi c\u1ea3 8 d\u1ea1ng r\u1eebng tr\u1ed3ng, l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 to\u00e0n l\u00e2m ph\u1ea7n co\u0301 m\u00f4\u0301i quan h\u00ea\u0323 kha\u0301 ch\u0103\u0323t ch\u1ebd v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra d\u1ec5 x\u00e1c \u0111\u1ecbnh trong l\u00e2m ph\u1ea7n nh\u01b0 D1,3<\/sub>, Hvn, N va\u0300 A. Ca\u0301c ph\u01b0\u01a1ng tri\u0300nh co\u0301 h\u00ea\u0323 s\u00f4\u0301 t\u01b0\u01a1ng quan cao va\u0300 sai ti\u00eau chu\u00e2\u0309n th\u00e2\u0301p. Ki\u00ea\u0309m tra sai s\u00f4\u0301 cu\u0309a ca\u0301c ph\u01b0\u01a1ng tri\u0300nh b\u0103\u0300ng s\u00f4\u0301 li\u00ea\u0323u ca\u0301c \u00d4TC kh\u00f4ng tham gia ti\u0301nh toa\u0301n cho th\u00e2\u0301y sai s\u00f4\u0301 <10%. Nh\u01b0 v\u1eady, c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nhanh kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a t\u1eebng d\u1ea1ng r\u1eebng tr\u1ed3ng theo t\u1eebng c\u1ea5p \u0111\u1ea5t ho\u1eb7c chung cho c\u00e1c c\u1ea5p \u0111\u1ea5t d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra d\u1ec5 x\u00e1c \u0111\u1ecbnh trong l\u00e2m ph\u1ea7n.<\/p>\n

3.3. X\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng<\/b><\/p>\n

Gia\u0301 tri\u0323 th\u01b0\u01a1ng ma\u0323i carbon cu\u0309a c\u1ea3 8 da\u0323ng r\u01b0\u0300ng tr\u00ean \u0111\u1ec1u r\u1ea5t l\u1edbn v\u00e0 c\u00f3 s\u1ef1 giao \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i m\u1ea1nh gi\u1eefa c\u00e1c c\u1ea5p tu\u1ed5i v\u00e0 c\u1ea5p \u0111\u1ea5t kh\u00e1c nhau. Nh\u00ecn chung, trong c\u00f9ng m\u1ed9t c\u1ea5p \u0111\u1ea5t, gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon t\u0103ng d\u1ea7n khi tu\u1ed5i r\u1eebng t\u0103ng l\u00ean; c\u00f2n n\u1ebfu x\u00e9t trong c\u00f9ng m\u1ed9t c\u1ea5p tu\u1ed5i, c\u1ea5p \u0111\u1ea5t c\u00e0ng cao (\u0111\u1ea5t c\u00e0ng x\u1ea5u) th\u00ec gi\u00e1 tr\u1ecb n\u00e0y c\u00e0ng gi\u1ea3m. T\u00ednh trung b\u00ecnh gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i CO2<\/sub> chi\u1ebfm t\u1eeb 18,6 – 42,6% so v\u1edbi t\u1ed5ng gi\u00e1 tr\u1ecb m\u00e0 r\u1eebng mang l\u1ea1i, trong \u0111\u00f3 lo\u00e0i Keo lai chi\u1ebfm l\u1edbn nh\u1ea5t \u0111\u1ea1t 42,6%.<\/p>\n

3.4. X\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m d\u1ef1 b\u00e1o l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 v\u00e0 gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng theo tu\u1ed5i, c\u1ea5p \u0111\u1ea5t v\u00e0 m\u1eadt \u0111\u1ed9 ho\u1eb7c d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n<\/b><\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c ph\u1ea7n m\u1ec1m d\u1ef1 b\u00e1o l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 v\u00e0 gi\u00e1 tr\u1ecb carbon cho 8 lo\u1ea1i r\u1eebng tr\u1ed3ng thu\u1ea7n lo\u00e0i: Keo lai, Keo tai t\u01b0\u1ee3ng, Keo l\u00e1 tr\u00e0m, Th\u00f4ng nh\u1ef1a, Th\u00f4ng 3 l\u00e1, Th\u00f4ng m\u00e3 v\u0129, M\u1ee1, B\u1ea1ch \u0111\u00e0n urophylla theo tu\u1ed5i, c\u1ea5p \u0111\u1ea5t v\u00e0 m\u1eadt \u0111\u1ed9 ho\u1eb7c d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n.<\/p>\n

IV. K\u1ebeT LU\u1eacN V\u00c0 KHUY\u1ebeN NGH\u1eca<\/b><\/p>\n

4.1. K\u1ebft lu\u1eadn<\/b><\/p>\n

– C\u1ea5u tr\u00fac t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n c\u1ee7a c\u1ea3 8 d\u1ea1ng r\u1eebng tr\u1ed3ng \u0111\u1ec1u t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf t\u1ea7ng c\u00e2y g\u1ed7 dao \u0111\u1ed9ng t\u1eeb 76,35% (B\u1ea1ch \u0111\u00e0n Urophylla, Keo l\u00e1 tr\u00e0m) \u0111\u1ebfn 87,64% (M\u1ee1), ti\u1ebfp \u0111\u1ebfn l\u00e0 v\u1eadt r\u01a1i r\u1ee5ng (tr\u1eeb Th\u00f4ng m\u00e3 v\u0129 v\u00e0 Th\u00f4ng nh\u1ef1a, 2 lo\u00e0i n\u00e0y c\u00f3 sinh kh\u1ed1i v\u1eadt r\u01a1i r\u1ee5ng \u0111\u1ea1t t\u01b0\u01a1ng \u1ee9ng l\u00e0 4,59% v\u00e0 6,86% l\u00e0 th\u1ea5p h\u01a1n so v\u1edbi sinh kh\u1ed1i c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i \u0111\u1ea1t t\u01b0\u01a1ng \u1ee9ng l\u00e0 9,64% v\u00e0 8,69%) dao \u0111\u1ed9ng t\u1eeb 8,86% (M\u1ee1) \u0111\u1ebfn 16,92% (Keo l\u00e1 tr\u00e0m) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 sinh kh\u1ed1i t\u1ea7ng c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i dao \u0111\u1ed9ng t\u1eeb 3,5% (M\u1ee1) \u0111\u1ebfn 9,64% (Th\u00f4ng m\u00e3 v\u0129). T\u1ed5ng sinh kh\u1ed1i c\u1ee7a l\u00e2m ph\u1ea7n ph\u1ee5 thu\u1ed9c r\u1ea5t l\u1edbn v\u00e0o c\u1ea5p \u0111\u1ea5t, tu\u1ed5i, m\u1eadt \u0111\u1ed9 l\u00e2m ph\u1ea7n,\u2026 Trong c\u00f9ng m\u1ed9t c\u1ea5p \u0111\u1ea5t, khi tu\u1ed5i r\u1eebng t\u0103ng l\u00ean th\u00ec t\u1ed5ng sinh kh\u1ed1i c\u0169ng c\u00f3 xu h\u01b0\u1edbng t\u0103ng theo v\u00e0 trong c\u00f9ng m\u1ed9t tu\u1ed5i th\u00ec t\u1ed5ng sinh kh\u1ed1i c\u1ee7a l\u00e2m ph\u1ea7n c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m d\u1ea7n theo c\u1ea5p \u0111\u1ea5t. V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi lo\u00e0i Th\u00f4ng nh\u1ef1a, giai \u0111o\u1ea1n tu\u1ed5i 5 – 30, t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n dao \u0111\u1ed9ng t\u1eeb 34,98 – 193,52 t\u1ea5n\/ha \u1edf c\u1ea5p \u0111\u1ea5t I; 29,28 – 166,09 t\u1ea5n\/ha \u1edf c\u1ea5p \u0111\u1ea5t II v\u00e0 20,79 – 144,41 t\u1ea5n\/ha; lo\u00e0i Th\u00f4ng ba l\u00e1 t\u00ednh chung cho c\u00e1c c\u1ea5p tu\u1ed5i t\u1eeb tu\u1ed5i 5 \u0111\u1ebfn 25, t\u1ed5ng sinh kh\u1ed1i c\u1ee7a l\u00e2m ph\u1ea7n \u1edf \u0111\u1ea5t c\u1ea5p II b\u1eb1ng 77% t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n \u1edf \u0111\u1ea5t c\u1ea5p I; t\u1ed5ng sinh kh\u1ed1i l\u00e2m ph\u1ea7n c\u1ee7a \u0111\u1ea5t c\u1ea5p III b\u1eb1ng 50%, sinh kh\u1ed1i \u1edf c\u1ea5p \u0111\u1ea5t IV b\u1eb1ng 31% v\u00e0 sinh kh\u1ed1i \u1edf c\u1ea5p \u0111\u1ea5t V ch\u1ec9 b\u1eb1ng 22% sinh kh\u1ed1i \u1edf c\u1ea5p \u0111\u1ea5t I,\u2026<\/p>\n

– C\u1ea5u tr\u00fac l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng h\u00ecnh th\u00e0nh 2 nh\u00f3m lo\u00e0i r\u00f5 r\u1ec7t: Nh\u00f3m lo\u00e0i c\u00e2y c\u00f3 c\u1ea5u tr\u00fac t\u1ed5ng l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 t\u1eadp trung ch\u1ee7 y\u1ebfu trong t\u1ea7ng c\u00e2y g\u1ed7 (g\u1ed3m 3 lo\u00e0i Th\u00f4ng nh\u1ef1a, Th\u00f4ng m\u00e3 v\u0129 v\u00e0 Th\u00f4ng ba l\u00e1) c\u00f3 t\u1ef7 l\u1ec7 l\u01b0\u1ee3ng carbon trong l\u00e2m ph\u1ea7n t\u1eadp trung \u1edf t\u1ea7ng c\u00e2y g\u1ed7 dao \u0111\u1ed9ng t\u1eeb 48,17% (Th\u00f4ng nh\u1ef1a) \u0111\u1ebfn 62,67% (Th\u00f4ng ba l\u00e1), ti\u1ebfp \u0111\u1ebfn l\u00e0 l\u01b0\u1ee3ng carbon t\u1eadp trung trong \u0111\u1ea5t r\u1eebng dao \u0111\u1ed9ng t\u1eeb 29,75% (Th\u00f4ng ba l\u00e1) \u0111\u1ebfn 45,64% (Th\u00f4ng nh\u1ef1a), l\u01b0\u1ee3ng carbon trong t\u1ea7ng c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i v\u00e0 t\u1ea7ng v\u1eadt r\u01a1i r\u1ee5ng chi\u1ebfm t\u1ef7 l\u1ec7 th\u1ea5p dao \u0111\u1ed9ng t\u1eeb 2,11 – 5,87%. Nh\u00f3m lo\u00e0i th\u1ee9 2 bao g\u1ed3m 5 lo\u00e0i c\u00f2n l\u1ea1i l\u00e0: Keo lai, Keo tai t\u01b0\u1ee3ng, B\u1ea1ch \u0111\u00e0n Urophylla, Keo l\u00e1 tr\u00e0m v\u00e0 M\u1ee1 th\u00ec c\u1ea5u tr\u00fac l\u01b0\u1ee3ng carbon trong l\u00e2m ph\u1ea7n t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf trong \u0111\u1ea5t r\u1eebng dao \u0111\u1ed9ng t\u1eeb 44,47% (Keo tai t\u01b0\u1ee3ng) \u0111\u1ebfn 67,74% (Keo lai), ti\u1ebfp \u0111\u1ebfn l\u00e0 t\u1ea7ng c\u00e2y g\u1ed7 27,51% (Keo lai) \u0111\u1ebfn 45,09% (M\u1ee1) v\u00e0 th\u1ea5p nh\u1ea5t v\u1eabn l\u00e0 c\u00e2y b\u1ee5i th\u1ea3m t\u01b0\u01a1i v\u00e0 v\u1eadt r\u01a1i r\u1ee5ng ch\u1ec9 chi\u1ebfm 1,38 – 6,41% t\u1ed5ng l\u01b0\u1ee3ng carbon c\u1ee7a l\u00e2m ph\u1ea7n. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u0111\u1ed1i v\u1edbi sinh kh\u1ed1i, t\u1ed5ng l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 c\u1ee7a l\u00e2m ph\u1ea7n c\u00f3 xu h\u01b0\u1edbng t\u0103ng d\u1ea7n theo tu\u1ed5i v\u00e0 gi\u1ea3m d\u1ea7n theo c\u1ea5p \u0111\u1ea5t. V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi lo\u00e0i Th\u00f4ng nh\u1ef1a c\u00f9ng m\u1ed9t tu\u1ed5i 20, \u1edf c\u1ea5p \u0111\u1ea5t I: t\u1ed5ng l\u01b0\u1ee3ng carbon h\u00e2\u0301p thu\u0323 l\u00e0 157,21 t\u1ea5n\/ha, \u1edf c\u1ea5p \u0111\u1ea5t II l\u00e0 122,71 t\u1ea5n\/ha v\u00e0 gi\u00e1 tr\u1ecb n\u00e0y c\u00f2n th\u1ea5p h\u01a1n \u1edf c\u1ea5p \u0111\u1ea5t III l\u00e0 95,29 t\u1ea5n\/ha; \u1edf c\u00f9ng c\u1ea5p \u0111\u1ea5t I, l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 c\u1ee7a r\u1eebng Keo lai dao \u0111\u1ed9ng t\u1eeb 50,76 – 108,82 t\u1ea5n\/ha t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1eeb tu\u1ed5i 1 \u0111\u1ebfn tu\u1ed5i 7,…<\/p>\n

– C\u00e1c ph\u01b0\u01a1ng tr\u00ecnh quan h\u1ec7 gi\u1eefa t\u1ed5ng sinh kh\u1ed1i, t\u1ed5ng l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra d\u1ec5 \u0111o \u0111\u1ebfm nh\u01b0: A, N, Hvn<\/sub>, D1,3<\/sub> \u0111\u1ec1u t\u1ed3n t\u1ea1i v\u1edbi h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan r\u1ea5t cao, sai ti\u00eau chu\u1ea9n b\u00e9. Do v\u1eady, c\u00f3 th\u1ec3 \u1ee9ng d\u1ee5ng trong x\u00e1c \u0111\u1ecbnh nhanh sinh kh\u1ed1i v\u00e0 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 carbon c\u1ee7a t\u1eebng d\u1ea1ng r\u1eebng tr\u1ed3ng theo c\u1ea5p \u0111\u1ea5t ho\u1eb7c chung cho c\u00e1c c\u1ea5p \u0111\u1ea5t d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra c\u01a1 b\u1ea3n trong l\u00e2m ph\u1ea7n.<\/p>\n

– Gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a 8 lo\u1ea1i r\u1eebng tr\u1ed3ng \u0111\u1ec1u r\u1ea5t l\u1edbn, chi\u1ebfm t\u1eeb 18,6 – 42,6% so v\u1edbi t\u1ed5ng gi\u00e1 tr\u1ecb m\u00e0 r\u1eebng mang l\u1ea1i, trong \u0111\u00f3 lo\u00e0i Keo lai chi\u1ebfm l\u1edbn nh\u1ea5t \u0111\u1ea1t 42,6%.<\/p>\n

– \u0110\u1ec1 t\u00e0i \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c b\u1ea3ng tra, ph\u1ea7n m\u1ec1m d\u1ef1 b\u00e1o l\u01b0\u1ee3ng carbon h\u1ea5p th\u1ee5 v\u00e0 gi\u00e1 tr\u1ecb th\u01b0\u01a1ng m\u1ea1i carbon c\u1ee7a 8 d\u1ea1ng r\u1eebng tr\u1ed3ng theo tu\u1ed5i, c\u1ea5p \u0111\u1ea5t v\u00e0 m\u1eadt \u0111\u1ed9 ho\u1eb7c d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n.<\/p>\n

4.2. Khuy\u1ebfn ngh\u1ecb<\/b><\/p>\n

– Co\u0301 th\u00ea\u0309 \u01b0\u0301ng du\u0323ng ca\u0301c k\u00ea\u0301t qua\u0309 nghi\u00ean c\u01b0\u0301u cu\u0309a \u0111\u00ea\u0300 ta\u0300i va\u0300 ph\u00e2\u0300n m\u00ea\u0300m d\u01b0\u0323 ba\u0301o sinh kh\u00f4\u0301i va\u0300 l\u01b0\u01a1\u0323ng carbon h\u00e2\u0301p thu\u0323 va\u0300o c\u00f4ng ta\u0301c \u0111i\u0323nh gia\u0301 m\u00f4\u0323t s\u00f4\u0301 loa\u0323i r\u01b0\u0300ng \u01a1\u0309 Vi\u00ea\u0323t Nam.<\/p>\n

– C\u00e2\u0300n co\u0301 nh\u01b0\u0303ng nghi\u00ean c\u01b0\u0301u c\u01a1 ba\u0309n v\u00ea\u0300 \u0111\u01b0\u01a1\u0300ng carbon c\u01a1 s\u01a1\u0309 cho ca\u0301c da\u0323ng r\u01b0\u0300ng tr\u00f4\u0300ng \u01a1\u0309 n\u01b0\u01a1\u0301c ta.<\/p>\n

– C\u00e2\u0300n co\u0301 nh\u01b0\u0303ng nghi\u00ean c\u01b0\u0301u ti\u00ea\u0301p theo v\u00ea\u0300 xa\u0301c \u0111i\u0323nh kha\u0309 n\u0103ng h\u00e2\u0301p thu\u0323 carbon cu\u0309a ca\u0301c da\u0323ng r\u01b0\u0300ng tr\u00f4\u0300ng, \u0111\u0103\u0323c bi\u00ea\u0323t la\u0300 r\u01b0\u0300ng ng\u00e2\u0323p m\u0103\u0323n ven bi\u00ea\u0309n, r\u01b0\u0300ng tra\u0300m; ca\u0301c tra\u0323ng tha\u0301i r\u01b0\u0300ng t\u01b0\u0323 nhi\u00ean: r\u01b0\u0300ng kh\u00f4\u0323p, r\u01b0\u0300ng tre n\u01b0\u0301a, r\u01b0\u0300ng IIA, IIB,…<\/p>\n

T\u00c0I LI\u1ec6U THAM KH\u1ea2O<\/b><\/p>\n

    \n
  1. Ph\u1ea1m V\u0103n \u0110i\u1ec3n (2004), Ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh sinh kh\u1ed1i v\u00e0 carbon t\u00edch lu\u1ef9 c\u1ee7a h\u1ec7 sinh th\u00e1i r\u1eebng<\/i>, t\u00e0i li\u1ec7u gi\u1ea3ng d\u1ea1y chuy\u00ean m\u00f4n ho\u00e1 k\u1ef9 thu\u1eadt l\u00e2m sinh, \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p.<\/li>\n
  2. Ph\u1ea1m Xu\u00e2n Ho\u00e0n (2005), C\u01a1 ch\u1ebf ph\u00e1t tri\u1ec3n s\u1ea1ch v\u00e0 c\u01a1 h\u1ed9i th\u01b0\u01a1ng m\u1ea1i carbon trong L\u00e2m nghi\u1ec7p, <\/i>NXB N\u00f4ng nghi\u1ec7p.<\/li>\n
  3. Nguy\u1ec5n Ng\u1ecdc Lung, Nguy\u1ec5n T\u01b0\u1eddng V\u00e2n (2004), Th\u1eed nghi\u1ec7m t\u00ednh to\u00e1n gi\u00e1 tr\u1ecb b\u1eb1ng ti\u1ec1n c\u1ee7a r\u1eebng tr\u1ed3ng trong c\u01a1 ch\u1ebf ph\u00e1t tri\u1ec3n s\u1ea1ch<\/i>, T\u1ea1p ch\u00ed N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n N\u00f4ng th\u00f4n, s\u1ed1 12\/2004.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    Ch\u1ee7 nhi\u1ec7m: PGS.TS V\u00f5 \u0110\u1ea1i H\u1ea3i; Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam I. \u0110\u1eb6T V\u1ea4N \u0110\u1ec0 \u1ede Vi\u1ec7t Nam, ng\u00e0y 28\/3\/2007 Th\u1ee7 t\u01b0\u1edbng Ch\u00ednh ph\u1ee7 \u0111\u00e3 ban h\u00e0nh Ngh\u1ecb \u0111\u1ecbnh s\u1ed1 48\/2007\/N\u0110-CP v\u1ec1 nguy\u00ean t\u1eafc v\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh gi\u00e1 c\u00e1c lo\u1ea1i r\u1eebng, hi\u1ec7n nay \u0111ang b\u01b0\u1edbc v\u00e0o th\u1ef1c hi\u1ec7n Ngh\u1ecb \u0111\u1ecbnh 99 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/12686"}],"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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=12686"}],"version-history":[{"count":4,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/12686\/revisions"}],"predecessor-version":[{"id":12688,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/12686\/revisions\/12688"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=12686"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=12686"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=12686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}