{"id":14903,"date":"2015-04-20T09:02:31","date_gmt":"2015-04-20T02:02:31","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=14903"},"modified":"2015-04-17T09:31:17","modified_gmt":"2015-04-17T02:31:17","slug":"bao-cao-ket-qua-de-tai-nghien-cuu-su-dung-go-bach-dan-urophylla-de-san-xuat-go-xe-dong-do-moc","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-ket-qua-de-tai-nghien-cuu-su-dung-go-bach-dan-urophylla-de-san-xuat-go-xe-dong-do-moc\/","title":{"rendered":"B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 \u0111\u1ec1 t\u00e0i: Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 b\u1ea1ch \u0111\u00e0n Urophylla \u0111\u1ec3 s\u1ea3n xu\u1ea5t g\u1ed7 x\u1ebb \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c"},"content":{"rendered":"

Nguy\u1ec5n Quang Trung<\/em><\/p>\n

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

G\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla (E. urophylla<\/i>) l\u00e0 ngu\u1ed3n nguy\u00ean li\u1ec7u ti\u1ec1m n\u0103ng, nh\u01b0ng vi\u1ec7c s\u1eed d\u1ee5ng lo\u1ea1i g\u1ed7 n\u00e0y l\u00e0m nguy\u00ean li\u1ec7u \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c \u0111ang c\u00f2n nhi\u1ec1u h\u1ea1n ch\u1ebf. C\u00e1c nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i n\u00e0y cho th\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 v\u1eadt l\u00ed t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi g\u1ed7 keo l\u00e1 tr\u00e0m (A. auriculiformis)<\/i> v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean kh\u00e1c \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i l\u00e0m nguy\u00ean li\u1ec7u \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c. C\u00e1c khuy\u1ebft t\u1eadt nh\u01b0: n\u1ee9t \u0111\u1ea7u, co ng\u00f3t v\u00e0 cong v\u00eanh trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn l\u00e0 nguy\u00ean nh\u00e2n ch\u1ee7 y\u1ebfu khi\u1ebfn lo\u1ea1i nguy\u00ean li\u1ec7u n\u00e0y ch\u01b0a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c c\u01a1 s\u1edf ch\u1ebf bi\u1ebfn \u0111\u1ed3 m\u1ed9c hi\u1ec7n nay. Nh\u1eb1m h\u1ea1n ch\u1ebf c\u00e1c khuy\u1ebft t\u1eadt v\u00e0 bi\u1ebfn d\u1ea1ng c\u1ee7a s\u1ea3n ph\u1ea9m, \u0111\u1ec1 t\u00e0i \u0111\u00e3 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p \u0111i\u1ec1u ti\u1ebft qu\u00e1 tr\u00ecnh tho\u00e1t\u00a0 \u1ea9m c\u1ee7a g\u1ed7 trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn: t\u1eeb kh\u00e2u b\u1ea3o qu\u1ea3n g\u1ed7 tr\u00f2n, x\u1eed l\u00ed g\u1ed7 x\u1ebb tr\u01b0\u1edbc khi s\u1ea5y v\u00e0 s\u1ea5y g\u1ed7. K\u1ebft qu\u1ea3 cho th\u1ea5y c\u00f3 th\u1ec3 h\u1ea1n ch\u1ebf \u0111\u00e1ng k\u1ec3 c\u00e1c lo\u1ea1i bi\u1ebfn d\u1ea1ng, n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m v\u00e0 hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng nguy\u00ean li\u1ec7u g\u1ed7. G\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla c\u00f3 kh\u1ea3 n\u0103ng b\u00e1m dinh t\u1ed1t v\u1edbi keo v\u00e0 c\u00e1c ch\u1ea5t trang ph\u1ee7 b\u1ec1 m\u1eb7t. S\u1ea3n ph\u1ea9m \u0111\u1ed3 m\u1ed9c t\u1eeb g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla c\u00f3 v\u00e2n th\u1edb, m\u00e0u s\u1eafc \u0111\u1eb9p.<\/p>\n

\"14-11-14<\/a><\/p>\n

1. \u0110\u1eb7t v\u1ea5n \u0111\u1ec1<\/strong><\/p>\n

B\u1ea1ch \u0111\u00e0n urophylla (E. urophylla<\/i>) l\u00e0 m\u1ed9t trong c\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u00ednh trong ch\u01b0\u01a1ng tr\u00ecnh tr\u1ed3ng r\u1eebng 5 tri\u1ec7u ha \u1edf Vi\u1ec7t Nam hi\u1ec7n nay. Di\u1ec7n t\u00edch r\u1eebng b\u1ea1ch \u0111\u00e0n urophylla \u1edf h\u1ea7u h\u1ebft c\u00e1c v\u00f9ng tr\u00ean c\u1ea3 n\u01b0\u1edbc ng\u00e0y c\u00e0ng t\u0103ng nh\u01b0ng th\u1ef1c tr\u1ea1ng s\u1eed d\u1ee5ng g\u1ed7 b\u1ea1ch \u0111\u00e0n ch\u01b0a t\u01b0\u01a1ng x\u1ee9ng v\u1edbi ti\u1ec1m n\u0103ng to l\u1edbn c\u1ee7a ngu\u1ed3n nguy\u00ean li\u1ec7u n\u00e0y.<\/p>\n

G\u1ed7 b\u1ea1ch \u0111\u00e0n Urophylla c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 l\u00ed t\u01b0\u01a1ng \u0111\u01b0\u01a1ng g\u1ed7 c\u1ee7a c\u00e1c lo\u00e0i keo v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean kh\u00e1c, nh\u01b0ng do c\u00e1c khuy\u1ebft t\u1eadt th\u01b0\u1eddng g\u1eb7p trong qu\u00e1 tr\u00ecnh x\u1ebb, s\u1ea5y n\u00ean g\u1ed7 b\u1ea1ch \u0111\u00e0n n\u00f3i chung, b\u1ea1ch \u0111\u00e0n urophylla ch\u01b0a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00f4ng nghi\u1ec7p s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c hi\u1ec7n nay.<\/p>\n

Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla \u0111\u1ec3 s\u1ea3n xu\u1ea5t g\u1ed7 x\u1ebb l\u00e0m nguy\u00ean li\u1ec7u \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c ch\u1eb3ng nh\u1eefng g\u00f3p ph\u1ea7n gi\u1ea3i quy\u1ebft kh\u00f3 kh\u0103n v\u1ec1 ngu\u1ed3n nguy\u00ean li\u1ec7u g\u1ed7 cho c\u00f4ng nghi\u1ec7p s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c \u1edf Vi\u1ec7t Nam hi\u1ec7n nay m\u00e0 c\u00f2n n\u00e2ng cao gi\u00e1 tr\u1ecb v\u00e0 \u0111a d\u1ea1ng h\u00f3a s\u1ea3n ph\u1ea9m c\u1ee7a g\u1ed7 r\u1eebng tr\u1ed3ng; g\u00f3p ph\u1ea7n n\u00e2ng cao thu nh\u1eadp cho ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng v\u00e0 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n urophylla<\/p>\n

2. V\u1eadt li\u1ec7u, n\u1ed9i dung v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/strong><\/p>\n

V\u1eadt li\u1ec7u nghi\u00ean c\u1ee9u: b\u1ea1ch \u0111\u00e0n urophylla tr\u1ed3ng t\u1eadp trung 7 tu\u1ed5i v\u00e0 11 tu\u1ed5i<\/p>\n

N\u1ed9i dung nghi\u00ean c\u1ee9u:<\/p>\n

–\u00a0 \u0110i\u1ec1u tra, kh\u1ea3o s\u00e1t x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m t\u1ef1 nhi\u00ean, t\u00ednh ch\u1ea5t v\u1eadt l\u00ed, c\u01a1 h\u1ecdc v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u00f4ng\u00a0\u00a0 ngh\u1ec7 c\u1ee7a g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla.<\/p>\n

–\u00a0 \u0110\u1ec1 xu\u1ea5t m\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p h\u1ea1n ch\u1ebf khuy\u1ebft\u00a0 t\u1eadt c\u1ee7a g\u1ed7 tr\u00f2n, g\u1ed7 x\u1ebb trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn.<\/p>\n

–\u00a0 \u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla l\u00e0m nguy\u00ean li\u1ec7u \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c<\/p>\n

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

–\u00a0 L\u1eadp \u00f4 ng\u1eabu nhi\u00ean, \u0111o \u0111\u1ebfm \u0111\u00e1nh gi\u00e1 c\u00e1c th\u00f4ng s\u1ed1 c\u1ee7a c\u00e2y \u0111\u1ee9ng. X\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 th\u00f4ng s\u1ed1 v\u1eadt l\u00ed\u00a0\u00a0 c\u1ee7a g\u1ed7 b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p kh\u00f4ng ph\u00e1 h\u1ee7y.<\/p>\n

–\u00a0 S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n Vi\u1ec7t Nam (TCVN) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 \u2013 l\u00ed v\u00e0 ph\u00e2n h\u1ea1ng nguy\u00ean li\u1ec7u g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla.<\/p>\n

–\u00a0 B\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m \u0111\u1ed1i ch\u1ee9ng, so s\u00e1nh, \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u1ee7a g\u1ed7 tr\u00f2n, g\u1ed7 x\u1ebb trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn. S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m exell\u00a0 \u0111\u1ec3 ph\u00e2n t\u00edch \u0111\u00e1nh gi\u00e1 c\u00e1c s\u1ed1 li\u1ec7u th\u00ed nghi\u1ec7m<\/p>\n

3. <\/b>K\u1ebft qu\u1ea3 v\u00e0 th\u1ea3o lu\u1eadn<\/b><\/p>\n

3.1.\u00a0\u00a0\u00a0 Th\u00f4ng s\u1ed1 ngo\u1ea1i h\u00ecnh c\u1ee7a c\u00e2y b\u1ea1ch \u0111\u00e0n urophylla\u00a0 t\u1ea1i m\u1ed9t s\u1ed1 c\u1ea5p tu\u1ed5i<\/b><\/p>\n

B\u1ea1ch \u0111\u00e0n urophylla l\u00e0 lo\u00e0i c\u00e2y m\u1ecdc nhanh, t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n \u0111\u1ea1t t\u1eeb 1,25 cm \u0111\u1ebfn 2 cm\/n\u0103m, t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao \u0111\u1ea1t t\u1eeb 1,2 m \u0111\u1ebfn 1,5 m\/n\u0103m t\u00f9y theo \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean (th\u1ed5 nh\u01b0\u1ee1ng, kh\u00ed h\u1eadu). C\u00e2y m\u1ecdc th\u1eb3ng, c\u00f3 th\u00e2n tr\u00f2n \u0111\u1ec1u, \u00edt b\u1ea1nh v\u00e8 (\u0111\u00e2y l\u00e0 \u0111\u1eb7c \u0111i\u1ec3m thu\u1eadn l\u1ee3i trong ch\u1ebf bi\u1ebfn g\u1ed7 x\u1ebb). K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra r\u1eebng tr\u1ed3ng bach \u0111\u00e0n t\u1ea1i m\u1ed9t s\u1ed1 v\u00f9ng cho th\u1ea5y: r\u1eebng tr\u1ed3ng t\u1ea1i An Kh\u00ea, Gia Lai sau 6 n\u0103m tu\u1ed5i c\u00f3 tr\u00ean 40% t\u1ed5ng s\u1ed1 c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh tr\u00ean 10 cm, nh\u01b0ng t\u1ea1i Ph\u00f9 Ninh ch\u1ec9 c\u00f3\u00a0 20 % c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh tr\u00ean 10cm, sau 7 n\u0103m. \u0110\u1ebfn \u0111\u1ed9 tu\u1ed5i 13 n\u0103m, tr\u00ean 40% s\u1ed1 c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c b\u00ecnh qu\u00e2n tr\u00ean 20 cm, trong \u0111\u00f3 kho\u1ea3ng 19% c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n tr\u00ean 26 cm. \u0110\u1ec3 s\u1eed d\u1ee5ng c\u00f3 hi\u1ec7u qu\u1ea3, r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n urophylla cung c\u1ea5p g\u1ed7 x\u1ebb ph\u1ea3i c\u00f3 c\u1ea5p tu\u1ed5i tr\u00ean 13 n\u0103m. Tuy nhi\u00ean trong th\u1ef1c t\u1ebf, chu k\u00ec kinh doanh r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n urphylla ch\u1ee7 y\u1ebfu \u0111\u1ec3 cung c\u1ea5p nguy\u00ean li\u1ec7u b\u0103m d\u0103m g\u1ed7 n\u00ean h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 c\u00e1c khu r\u1eebng tr\u1ed3ng t\u1eadp trung b\u1ea1ch \u0111\u00e0n urophylla l\u1edbn h\u01a1n 11 n\u0103m tu\u1ed5i.<\/p>\n

C\u00e1c s\u1ed1 li\u1ec7u trong b\u1ea3ng 1 d\u01b0\u1edbi \u0111\u00e2y ch\u1ec9 c\u00f3 t\u00ednh ch\u1ea5t tham kh\u1ea3o \u0111\u1ec3 xem x\u00e9t c\u1ea5p \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh \u1edf m\u1ed9t s\u1ed1 c\u1ea5p tu\u1ed5i, kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb \u0111\u00e1nh gi\u00e1 t\u00f3c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng c\u1ee7a b\u1ea1ch \u0111\u00e0n Urophylla v\u00ec s\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c \u0111o \u0111\u1ebfm \u1edf c\u00e1c v\u00f9ng kh\u00e1c nhau.<\/p>\n

B\u1ea3ng1: Th\u00f4ng s\u1ed1 ngo\u1ea1i h\u00ecnh c\u1ee7a c\u00e2y \u0111\u1ee9ng \u1edf 7 c\u1ea5p tu\u1ed5i\u00a0 t\u1ea1i m\u1ed9t s\u1ed1 v\u00f9ng<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
TT<\/td>\nC\u00e1c th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc<\/td>\n\u0110\u01a1n v\u1ecb \u0111o<\/td>\n\n

Tu\u1ed5i c\u00e2y<\/p>\n<\/td>\n<\/tr>\n

6<\/td>\n7<\/td>\n9<\/td>\n10<\/td>\n11<\/td>\n12<\/td>\n13<\/td>\n<\/tr>\n
1<\/td>\nCCvn<\/td>\nm<\/td>\n10,3<\/td>\n10,6<\/td>\n12,8<\/td>\n13,2<\/td>\n14,5<\/td>\n14,6<\/td>\n18,1<\/td>\n<\/tr>\n
2<\/td>\nCCpc<\/td>\nm<\/td>\n6,3<\/td>\n5,44<\/td>\n7,63<\/td>\n5,70<\/td>\n8,5<\/td>\n8,82<\/td>\n10,7<\/td>\n<\/tr>\n
3<\/td>\n\u0110K TB l\u1edbn<\/td>\ncm<\/td>\n12,79<\/td>\n12,12<\/td>\n15,7<\/td>\n17,12<\/td>\n19,3<\/td>\n20,3<\/td>\n22,9<\/td>\n<\/tr>\n
4<\/td>\n\u0110K TB nh\u1ecf<\/td>\ncm<\/td>\n12,26<\/td>\n11,52<\/td>\n14,74<\/td>\n14,57<\/td>\n18,7<\/td>\n21,9<\/td>\n18,7<\/td>\n<\/tr>\n
5<\/td>\n\u00a0\u0110\u1ed9 tr\u00f2n th\u00e2n c\u00e2y<\/td>\n<\/td>\n0,04<\/td>\n0,05<\/td>\n0,06<\/td>\n0,04<\/td>\n0,04<\/td>\n0,02<\/td>\n0,06<\/td>\n<\/tr>\n
6<\/td>\n\u00a0\u0110K 10 \u2264 D \u2264 14 (cm)<\/td>\n%<\/td>\n54<\/td>\n80<\/td>\n41,2<\/td>\n36,50<\/td>\n21,8<\/td>\n19,5<\/td>\n15,8<\/td>\n<\/tr>\n
7<\/td>\n\u0110K14 < D \u2264 16 (cm)<\/td>\n%<\/td>\n28<\/td>\n20<\/td>\n16,2<\/td>\n27,50<\/td>\n15,6<\/td>\n12,5<\/td>\n11,9<\/td>\n<\/tr>\n
8<\/td>\n\u0110K16 < D \u2264 18 (cm)<\/td>\n%<\/td>\n16<\/td>\n0<\/td>\n13,2<\/td>\n20,00<\/td>\n15,2<\/td>\n19,5<\/td>\n18,2<\/td>\n<\/tr>\n
9<\/td>\n\u0110K18 < D \u2264 20 (cm)<\/td>\n%<\/td>\n2<\/td>\n0<\/td>\n14,7<\/td>\n10,00<\/td>\n17,9<\/td>\n5,5<\/td>\n6,5<\/td>\n<\/tr>\n
10<\/td>\n\u0110K 20 < D \u2264 26 (cm)<\/td>\n%<\/td>\n0<\/td>\n0<\/td>\n12,7<\/td>\n5,00<\/td>\n15,5<\/td>\n25,4<\/td>\n28,2<\/td>\n<\/tr>\n
10<\/td>\n\u0110K26 < D \u2264 30 (cm)<\/td>\n%<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n12,6<\/td>\n15,2<\/td>\n18,5<\/td>\n<\/tr>\n
<\/td>\n\u0110\u1ecba \u0111i\u1ec3m<\/td>\n<\/td>\nAK<\/td>\nPN<\/td>\nQT<\/td>\nBD<\/td>\nPN<\/td>\nTT<\/td>\nMY<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ch\u00fa th\u00edch:<\/p>\n

CCvn: chi\u1ec1u cao v\u00fat ng\u1ecdn, CCpc: chi\u1ec1u cao ph\u00e2n c\u00e0nh<\/p>\n

\u0110K TB l\u1edbn: \u0110\u01b0\u1eddng k\u00ednh trung b\u00ecnh l\u1edbn<\/p>\n

\u0110K TB nh\u1ecf: \u0110\u01b0\u01a1ng k\u00ednh trung b\u00ecnh hh\u1ecf<\/p>\n

AK: R\u1eebng tr\u1ed3ng t\u1ea1i An Kh\u00ea; PN: r\u1eebng tr\u1ed3ng t\u1ea1i Ph\u00f9 Ninh; QT: r\u1eebng tr\u1ed3ng t\u1ea1i Qu\u1ea3ng Tr\u1ecb;<\/p>\n

TT: r\u1eebng tr\u1ed3ng t\u1ea1i Tam Thanh; MY: r\u1eebng tr\u1ed3ng t\u1ea1i MangYang, GiaLai<\/p>\n

 <\/p>\n

3.2 T\u00ednh ch\u1ea5t v\u1eadt l\u00ed v\u00e0 c\u01a1 h\u1ecdc c\u1ee7a g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla<\/b><\/p>\n

B\u1ea1ch \u0111\u00e0n urophylla l\u00e0 m\u1ed9t lo\u1ea1i g\u1ed7 c\u1ee9ng c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng trung b\u00ecnh, \u0111\u1ed9 co r\u00fat theo c\u00e1c h\u01b0\u1edbng ti\u1ebfp tuy\u1ebfn v\u00e0 xuy\u00ean t\u00e2m \u0111\u1ec1u l\u1edbn h\u01a1n so v\u1edbi g\u1ed7 keo (keo l\u00e1 tr\u00e0m v\u00e0 keo tai t\u01b0\u1ee3ng), nh\u01b0ng \u0111\u1ed9 b\u1ec1 c\u01a1 h\u1ecdc (\u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh) l\u1ea1i th\u1ea5p h\u01a1n 2 lo\u1ea1i g\u1ed7 tr\u00ean, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla gi\u00f2n h\u01a1n c\u00e1c lo\u1ea1i g\u1ed7 keo.<\/p>\n

B\u1ea3ng 2:\u00a0 T\u00ednh ch\u1ea5t v\u1eadt l\u00ed v\u00e0 c\u01a1 h\u1ecdc c\u1ee7a g\u1ed7 b\u1ea1ch \u0111\u00e0n Urophylla<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
TT<\/td>\nT\u00ednh ch\u1ea5t<\/td>\n\u0110\u01a1n v\u1ecb t\u00ednh<\/td>\n7 n\u0103m tu\u1ed5i<\/td>\n11 n\u0103m tu\u1ed5i<\/td>\n<\/tr>\n
1<\/td>\n\u0110\u1ed9 co r\u00fat to\u00e0n b\u1ed9-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Chi\u1ec1u d\u1ecdc th\u1edb-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H\u01b0\u1edbng xuy\u00ean t\u00e2m<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H\u01b0\u1edbng ti\u1ebfp tuy\u1ebfn<\/td>\n

%<\/td>\n\n

0,17<\/p>\n

6,11<\/p>\n

10,16<\/p>\n<\/td>\n

\n

0,21<\/p>\n

6,79<\/p>\n

8,88<\/p>\n<\/td>\n<\/tr>\n

2<\/td>\nH\u1ec7 s\u1ed1 co r\u00fat to\u00e0n b\u1ed9-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Chi\u1ec1u d\u1ecdc th\u1edb-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H\u01b0\u1edbng xuy\u00ean t\u00e2m<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H\u01b0\u1edbng ti\u1ebfp tuy\u1ebfn<\/td>\n

% \/ %<\/td>\n\n

0,01<\/p>\n

0,20<\/p>\n

0,34<\/p>\n<\/td>\n

\n

0,01<\/p>\n

0,23<\/p>\n

0,33<\/p>\n<\/td>\n<\/tr>\n

3<\/td>\n\u0110\u1ed9 co r\u00fat th\u1ec3 t\u00edch<\/td>\n%<\/td>\n\n

7,0<\/p>\n<\/td>\n

\n

9,0<\/p>\n<\/td>\n<\/tr>\n

4<\/td>\nH\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch<\/td>\n% \/ %<\/td>\n\n

0,5<\/p>\n<\/td>\n

\n

0,6<\/p>\n<\/td>\n<\/tr>\n

5<\/td>\nKh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0110\u1ed9 \u1ea9m 12%-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0110\u1ed9 \u1ea9m 18%<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0110\u1ed9 \u1ea9m 0%<\/td>\n

g\/cm3<\/sup><\/td>\n\n

0,649<\/p>\n

0,670<\/p>\n

0,619<\/p>\n<\/td>\n

\n

0,841<\/p>\n

0,864<\/p>\n

0,811<\/p>\n<\/td>\n<\/tr>\n

6<\/td>\n\u1ee8ng su\u1ea5t k\u00e9o d\u1ecdc th\u1edb (w=12%)<\/td>\nMPa<\/td>\n\n

94,0<\/p>\n<\/td>\n

\n

138,4<\/p>\n<\/td>\n<\/tr>\n

7<\/td>\n\u1ee8ng su\u1ea5t n\u00e9n d\u1ecdc th\u1edb<\/td>\nMPa<\/td>\n\n

49,4<\/p>\n<\/td>\n

\n

63,6<\/p>\n<\/td>\n<\/tr>\n

8<\/td>\n\u1ee8ng su\u1ea5t tr\u01b0\u1ee3t d\u1ecdc th\u1edb (w=12%)-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M\u1eb7t tr\u01b0\u1ee3t xuy\u00ean t\u00e2m-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M\u1eb7t tr\u01b0\u1ee3t ti\u1ebfp tuy\u1ebfn<\/td>\nMPa<\/td>\n\n

11,4<\/p>\n

12,7<\/p>\n<\/td>\n

\n

16,7<\/p>\n

18,4<\/p>\n<\/td>\n<\/tr>\n

9<\/td>\n\u1ee9ng su\u1ea5t u\u1ed1n ngang th\u1edb (w=12%)-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Theo h\u01b0\u1edbng xuy\u00ean t\u00e2mTheo h\u01b0\u1edbng ti\u1ebfp tuy\u1ebfn<\/p>\n

 <\/td>\n

MPa<\/td>\n\n

91,3<\/p>\n

92,3<\/p>\n<\/td>\n

\n

110,7<\/p>\n

106,8<\/p>\n<\/td>\n<\/tr>\n

10<\/td>\nM\u00f4 \u0111un \u0111\u00e0n h\u1ed3i u\u1ed1n t\u0129nh ngang th\u1edb-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H\u01b0\u1edbng xuy\u00ean t\u00e2m-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H\u01b0\u1edbng ti\u1ebfp tuy\u1ebfn<\/td>\nMpa<\/td>\n\n

5,11<\/p>\n

4,93<\/p>\n<\/td>\n

\n

6,80<\/p>\n

6,54<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

B\u1ea3ng 3:\u00a0 So s\u00e1nh t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00ed c\u1ee7a g\u1ed7 b\u1ea1ch \u0111\u00e0n Uro v\u1edbi\u00a0 m\u1ed9t s\u1ed1 lo\u00e0i g\u1ed7 kh\u00e1c<\/p>\n\n\n\n\n\n\n\n\n\n
TT<\/td>\nT\u00ddnh ch\u00cat<\/td>\n\u00a7\u00acn v\u00de<\/td>\nKeo l\u00e1 tr\u00e0m<\/td>\nKeo tai t\u01b0\u1ee3ng<\/td>\nE.camal<\/i><\/td>\nE.Uro<\/i><\/td>\n<\/tr>\n
1<\/td>\nKh\u00e8i l\u00ad\u00eeng th\u00d3 t\u00ddch (0%)<\/td>\n\n

g\/cm3<\/sup><\/p>\n<\/td>\n

\n

0,560<\/p>\n<\/td>\n

\n

0,554<\/p>\n<\/td>\n

\n

0,66<\/p>\n<\/td>\n

\n

0,619<\/p>\n<\/td>\n<\/tr>\n

2<\/td>\nKh\u00e8i l\u00ad\u00eeng th\u00d3 t\u00ddch (12%)<\/td>\n\n

g\/cm3<\/sup><\/p>\n<\/td>\n

\n

0,597<\/p>\n<\/td>\n

\n

0,586<\/p>\n<\/td>\n

\n

0,80<\/p>\n<\/td>\n

\n

0,649<\/p>\n<\/td>\n<\/tr>\n

3<\/td>\n\u00a7\u00e9 co r\u00f3t xuy\u00aan t\u00a9m<\/td>\n\n

%<\/p>\n<\/td>\n

\n

1,53<\/p>\n<\/td>\n

\n

1,77<\/p>\n<\/td>\n

\n

7,71<\/p>\n<\/td>\n

\n

6,11<\/p>\n<\/td>\n<\/tr>\n

4<\/td>\n\u00a7\u00e9 co r\u00f3t ti\u00d5p tuy\u00d5n<\/td>\n\n

%<\/p>\n<\/td>\n

\n

3.81<\/p>\n<\/td>\n

\n

4.63<\/p>\n<\/td>\n

\n

11,2<\/p>\n<\/td>\n

\n

10,16<\/p>\n<\/td>\n<\/tr>\n

5<\/td>\nU\u00e8n t\u00dcnh xuy\u00aan t\u00a9m<\/td>\n\n

MPa<\/p>\n<\/td>\n

\n

102,8<\/p>\n<\/td>\n

\n

99,8<\/p>\n<\/td>\n

<\/td>\n\n

91,3<\/p>\n<\/td>\n<\/tr>\n

6<\/td>\nU\u00e8n t\u00dcnh ti\u00d5p tuy\u00d5n<\/td>\n\n

MPa<\/p>\n<\/td>\n

\n

99,0<\/p>\n<\/td>\n

\n

99,0<\/p>\n<\/td>\n

<\/td>\n\n

92,3<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

3.3\u00a0 T\u00ecnh tr\u1ea1ng v\u00e0 m\u1ee9c \u0111\u1ed9\u00a0 khuy\u1ebft t\u1eadt th\u01b0\u1eddng g\u1eb7p\u00a0 c\u1ee7a g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn g\u1ed7 x\u1ebb<\/b><\/p>\n

* N\u1ee9t \u0111\u1ea7u g\u1ed7 tr\u00f2n l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ph\u1ed5 bi\u1ebfn th\u01b0\u1eddng th\u1ea5y \u1edf g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla.. T\u1ec9 l\u1ec7 v\u00e0 m\u1ee9c \u0111\u1ed9 n\u1ee9t \u0111\u1ea7u c\u1ee7a g\u1ed7 tr\u00f2n sau khi ch\u1eb7t h\u1ea1 c\u00f2n t\u00f9y thu\u1ed9c v\u00e0o m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1: C\u00e2y m\u1ecdc tr\u00ean s\u01b0\u1eddn d\u1ed1c m\u1ee9c \u0111\u1ed9 n\u1ee9t \u0111\u1ea7u cao h\u01a1n so v\u1edbi c\u00e2y m\u1ecdc tr\u00ean \u0111\u1ecba h\u00ecnh t\u01b0\u01a1ng \u0111\u1ed1i b\u1eb1ng ph\u1eb3ng. Ki\u1ec3u n\u1ee9t xuy\u00ean t\u00e2m l\u00e0 ph\u1ed5 bi\u1ebfn, n\u1ee9t v\u00e0nh kh\u0103n \u00edt xu\u1ea5t hi\u1ec7n \u1edf c\u00e1c c\u00e2y 7 \u0111\u1ebfn t\u00e1m n\u0103m tu\u1ed5i (th\u01b0\u1eddng ch\u1ec9 xu\u1ea5t hi\u1ec7n \u1edf c\u00e1c c\u00e2y 11 n\u0103m tu\u1ed5i tr\u1edf l\u00ean)<\/p>\n

* K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 v\u1ec1 \u0111\u1ed9 co ng\u00f3t c\u1ee7a v\u00e1n x\u1ebb theo c\u00e1c c\u1ea1nh r\u1ed9ng v\u00e0 d\u00e0y t\u1ea1i c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau tr\u00ean m\u1eb7t c\u1eaft ngang cho th\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla c\u00f3 m\u1ee9c \u0111\u1ed9 co ng\u00f3t th\u1ea5p h\u01a1n g\u1ed7 b\u1ea1ch \u0111\u00e0n E.camaldulensis<\/i> nh\u01b0ng cao h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi g\u1ed7 keo tai t\u01b0\u1ee3ng v\u00e0 keo l\u00e1 tr\u00e0m. V\u1edbi c\u00e1c m\u1eabu n\u1eb1m t\u1ea1i v\u1ecb tr\u00ed 30o<\/sup> \u2264 \u03b1 \u2264 60o <\/sup>co ng\u00f3t tuy\u1ec7t \u0111\u1ed1i theo c\u00e1c chi\u1ec1u r\u1ed9ng v\u00e0 d\u00e0y x\u1ea5p x\u1ec9 nhau. Vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 co ng\u00f3t l\u00e0 c\u01a1 s\u1edf t\u00ednh to\u00e1n l\u01b0\u1ee3ng d\u01b0 c\u1ee7a k\u00edch th\u01b0\u1edbc ph\u00f4i thanh khi l\u1eadp s\u01a1 \u0111\u1ed3 x\u1ebb.<\/p>\n

+ M\u1ee9c \u0111\u1ed9 khuy\u1ebft t\u1eadt c\u1ee7a g\u1ed7 ngay sau khi x\u1ebb v\u00e0 trong qu\u00e1 tr\u00ecnh hong ph\u01a1i t\u1ef1 nhi\u00ean<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 K\u1ebft qu\u1ea3 theo d\u00f5i cho th\u1ea5y ngay sau khi x\u1ebb, c\u00e1c khuy\u1ebft t\u1eadt v\u1ec1 cong v\u00e0 n\u1ee9t \u0111\u1ea7u c\u1ee7a g\u1ed7 7 n\u0103m tu\u1ed5i \u1edf m\u1ee9c \u0111\u1ed9 th\u1ea5p h\u01a1n so v\u1edbi g\u1ed7 11 n\u0103m tu\u1ed5i.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Trong qu\u00e1 tr\u00ecnh hong ph\u01a1i: N\u1ee9t \u0111\u1ea7u c\u1ee7a g\u1ed7 11 tu\u1ed5i hong ph\u01a1i t\u1ef1 nhi\u00ean l\u1edbn h\u01a1n so v\u1edbi g\u1ed7 7 n\u0103m tu\u1ed5i (v\u1edbi g\u1ed7 11 tu\u1ed5i, t\u1ea5t c\u1ea3 c\u00e1c t\u1ea5m v\u00e1n hong ph\u01a1i \u0111\u1ec1u b\u1ecb n\u1ee9t \u0111\u1ea7u, chi\u1ec1u d\u00e0i v\u00e0 r\u1ed9ng c\u1ee7a v\u1ebft n\u1ee9t l\u1edbn h\u01a1n so v\u1edbi g\u1ed7 7 n\u0103m tu\u1ed5i), nh\u01b0ng g\u1ed7 7 n\u0103m tu\u1ed5i b\u1ecb mo-m\u00f3p nhi\u1ec1u h\u01a1n so v\u1edbi g\u1ed7 11 tu\u1ed5i. Ch\u00ednh \u0111i\u1ec1u n\u00e0y s\u1ebd l\u00e0m cho t\u1ec9 l\u1ec7 s\u1eed d\u1ee5ng g\u1ed7 th\u1ea5p.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t \u0111\u1ea7u x\u1ea3y ra m\u1ea1nh trong 30 ng\u00e0y \u0111\u1ea7u, nh\u1eefng ng\u00e0y sau v\u1eabn ti\u1ebfp t\u1ee5c b\u1ecb n\u1ee9t nh\u01b0ng m\u1ee9c \u0111\u1ed9 gi\u1ea3m h\u01a1n<\/p>\n

3.4\u00a0 Bi\u1ec7n ph\u00e1p x\u1eed l\u00ed h\u1ea1n ch\u1ebf n\u1ee9t \u0111\u1ea7u c\u1ee7a g\u1ed7 tr\u00f2n v\u00e0\u00a0 g\u1ed7 x\u1ebb<\/b>:<\/p>\n

–\u00a0\u00a0 K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y n\u1ebfu qu\u00e1 tr\u00ecnh tho\u00e1t \u1ea9m c\u1ee7a g\u1ed7 tr\u00f2n v\u00e0 g\u1ed7 x\u1ebb \u0111\u01b0\u1ee3c \u0111i\u1ec1u ti\u1ebft v\u00e0 duy tr\u00ec \u0111\u1ed9 \u1ea9m c\u1ee7a g\u1ed7 tr\u00f2n \u1edf m\u1ee9c kh\u00f4ng th\u1ea5p h\u01a1n 75%, g\u1ed7 x\u1ebb \u1edf m\u1ee9c 45%, hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t \u0111\u1ea7u gi\u1ea3m \u0111\u00e1ng k\u1ec3 v\u00e0 k\u00edch th\u01b0\u1edbc v\u1ebft n\u1ee9t nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi \u0111\u1ec3 g\u1ed7 tho\u00e1t \u1ea9m t\u1ef1 do c\u1ee7a g\u1ed7 theo \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean c\u1ee7a m\u00f4i tr\u01b0\u1eddng xung quanh. \u0110\u1ed1i v\u1edbi g\u1ed7 tr\u00f2n, \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 \u1ea9m n\u00f3i tr\u00ean, g\u1ed7 ph\u1ea3i \u0111\u01b0\u1ee3c ng\u00e2m trong n\u01b0\u1edbc ho\u1eb7c l\u01b0u tr\u1eef g\u1ed7\u00a0 trong m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111\u1ed9 \u1ea9m tr\u00ean 80% (v\u00ed d\u1ee5 nh\u01b0 gi\u1ea3i ph\u00e1p \u0111\u00e3 th\u1ef1c hi\u1ec7n trong \u0111\u1ec1 t\u00e0i: ph\u1ee7 b\u1ea1t v\u00e0 phun n\u01b0\u1edbc b\u00ean trong \u0111\u1ecbnh k\u00ec \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 \u1ea9m m\u00f4i tr\u01b0\u1eddng). \u0110\u1ed1i v\u1edbi g\u1ed7 x\u1ebb, g\u1ed7 ngay sau khi x\u1ebb \u0111\u01b0\u1ee3c hong ph\u01a1i trong nh\u00e0 v\u00e0 c\u00f3 bi\u1ec7n ph\u00e1p \u0111i\u1ec1u ti\u1ebft qu\u00e1 tr\u00ecnh tho\u00e1t \u1ea9m c\u1ee7a g\u1ed7 b\u1eb1ng vi\u1ec7c \u0111i\u1ec1u ti\u1ebft \u0111\u1ed9 \u1ea9m m\u00f4i tr\u01b0\u1eddng xung quanh \u0111\u1ed1ng g\u1ed7. Gi\u1ea3i ph\u00e1p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 x\u1ebfp g\u1ed7 trong nh\u00e0 v\u00e0 d\u00f9ng b\u1ea1t ph\u1ee7 \u0111\u1ec3 \u0111i\u1ec1u ti\u1ebft qu\u00e1 tr\u00ecnh tho\u00e1t \u1ea9m c\u1ee7a g\u1ed7 c\u0169ng \u0111\u00e3 h\u1ea1n ch\u1ebf \u0111\u00e1ng k\u1ec3 hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t \u0111\u1ea7u g\u1ed7 x\u1ebb. T\u1ea1i c\u00e1c n\u01b0\u1edbc ph\u00e1t tri\u1ec3n, thi\u1ebft b\u1ecb v\u00e0 s\u01a1 \u0111\u1ed3 x\u1ebb h\u1ee3p l\u00ed c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u1ea3ng k\u1ec3 hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t \u0111\u1ea7u v\u00e1n x\u1ebb<\/p>\n

+ S\u1ea5y g\u1ed7:\u00a0\u00a0 G\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla l\u00e0 lo\u1ea1i g\u1ed7 kh\u00f3 s\u1ea5y, \u0111\u1ec3 h\u1ea1n ch\u1ebf c\u00e1c khuy\u1ebft t\u1eadt n\u1ee9t \u0111\u1ea7u v\u00e0 cong v\u00eanh c\u1ee7a s\u1ea3n ph\u1ea9m; ph\u1ea3i s\u1ea5y g\u1ed7 trong l\u00f2 c\u00f3 th\u1ec3 \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m m\u00f4i tr\u01b0\u1eddng trong l\u00f2 t\u01b0\u01a1ng \u0111\u1ed1i ch\u00ednh x\u00e1c theo ch\u1ebf \u0111\u1ed9 s\u1ea5y \u201cm\u1ec1m\u201d \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng. v\u1edbi s\u1ea3n ph\u1ea9m g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla d\u00e0y 30 mm, r\u1ed9ng 80mm \u0111\u1ebfn 180 mm d\u00e0i 2m \u0111\u1ebfn 2,2m; ch\u1ebf \u0111\u1ed9 s\u1ea5y th\u1eed nghi\u1ec7m nh\u01b0 sau:<\/p>\n

 <\/p>\n

 <\/p>\n

B\u1ea3ng 4:\u00a0\u00a0 Ch\u1ebf \u0111\u1ed9 s\u1ea5y th\u1eed nghi\u1ec7m t\u1ea1i Quy Nh\u01a1n (l\u00f2 s\u1ea5y h\u01a1i n\u01b0\u1edbc)<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Th\u1eddi gian(gi\u1edd)<\/td>\nT0 <\/sup>kh\u00f4<\/td>\nT0<\/sup> \u01b0\u1edbt<\/td>\nV\u1eadn h\u00e0nh l\u00f2<\/td>\n<\/tr>\n
10<\/td>\n40<\/td>\n38<\/td>\nPhun \u1ea9m 4 gi\u1edd<\/td>\n<\/tr>\n
20<\/td>\n42<\/td>\n39<\/td>\nPhun \u1ea9m \u0111\u1ecbnh k\u00ec 10 h 1 l\u1ea7n, m\u1ed7i l\u1ea7n 2h <\/td>\n<\/tr>\n
40<\/td>\n45<\/td>\n38<\/td>\n<\/tr>\n
60<\/td>\n45<\/td>\n38<\/td>\n<\/tr>\n
80<\/td>\n48<\/td>\n38<\/td>\n<\/tr>\n
100<\/td>\n48<\/td>\n38<\/td>\nM\u1edf TDKX\u1eed l\u00ed \u1ea9m 2h<\/td>\n<\/tr>\n
120<\/td>\n50<\/td>\n37<\/td>\n<\/tr>\n
140<\/td>\n50<\/td>\n37<\/td>\nTDK \u0111\u00f3ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Nh\u1eadn x\u00e9t s\u01a1 b\u1ed9 v\u1ec1 m\u1ee9c \u0111\u1ed9 khuy\u1ebft t\u1eadt g\u1ed7 x\u1ebb sau s\u1ea5y cho c\u00e1c h\u00ecnh th\u1ee9c hong ph\u01a1i<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 G\u1ed7 hong ph\u01a1i ngo\u00e0i tr\u1eddi sau khi s\u1ea5y c\u00f3 t\u1ec9 l\u1ec7 khuy\u1ebft t\u1eadt, bi\u1ebfn d\u1ea1ng cao, m\u1ed9t s\u1ed1 t\u1ea5m \u0111\u00e3 b\u1ecb n\u1ee9t \u0111\u1ea7u ti\u1ebfp t\u1ee5c n\u1ee9t d\u00e0i v\u00e0 r\u1ed9ng th\u00eam. Nh\u01b0ng s\u1ed1 t\u1ea5m n\u1ee9t ph\u00e1t sinh \u00edt h\u01a1n so v\u1edbi c\u00e1c h\u00ecnh th\u1ee9c hong ph\u01a1i kh\u00e1c.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H\u1ed7 hong ph\u01a1i c\u00f3 ph\u1ee7 b\u1ea1t trong nh\u00e0: nh\u00ecn chung m\u1ee9c \u0111\u1ed9 khuy\u1ebft t\u1eadt c\u1ee7a h\u00ecnh th\u1ee9c hong ph\u01a1i n\u00e0y \u00edt tr\u1ea7m tr\u1ecdng h\u01a1n. M\u00e0u g\u1ed7 sau khi s\u1ea5y s\u00e1ng.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M\u1ee9c \u0111\u1ed9 khuy\u1ebft t\u1eadt \u1edf d\u1ea1ng n\u1ee9t \u0111\u1ea7u, mo v\u00e0 cong theo chi\u1ec1u c\u1ea1nh t\u1ea5m v\u00e1n\u00a0 kh\u00f3 kh\u1eafc ph\u1ee5c v\u00e0 \u1ea3nh h\u01b0\u1edfng t\u1edbi t\u1ec9 l\u1ec7 s\u1eed d\u1ee5ng g\u1ed7, cong theo chi\u1ec1u d\u00e0i (bow) c\u00f3 th\u1ec3 ph\u1ee5c h\u1ed3i \u0111\u01b0\u1ee3c.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M\u1ee9c \u0111\u1ed9 b\u1ecb co ng\u00f3t (shrinkage) c\u1ee7a c\u1ea3 2 h\u00ecnh th\u1ee9c hong ph\u01a1i ngo\u00e0i tr\u1eddi v\u00e0 hong ph\u01a1i c\u00f3 phun \u1ea9m l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau, hong ph\u01a1i trong nh\u00e0 c\u00f3 ph\u1ee7 b\u1ea1t \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao h\u01a1n.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ch\u1ebf \u0111\u1ed9 s\u1ea5y n\u00e0y t\u01b0\u01a1ng \u0111\u1ed1i ph\u00f9 h\u1ee3p v\u00e0 c\u00f3 th\u1ec3 m\u1ee9c \u0111\u1ed9 khuy\u1ebft t\u1eadt trong qu\u00e1 tr\u00ecnh s\u1ea5y s\u1ebd gi\u1ea3m \u0111i n\u1ebfu thi\u1ebft b\u1ecb l\u00f2 s\u1ea5y c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n b\u01b0\u1edbc x\u1eed l\u00ed ban \u0111\u1ea7u b\u1eb1ng h\u01a1i qu\u00e1 nhi\u1ec7t l\u00e0m m\u1ec1m g\u1ed7, ph\u1ee5c h\u1ed3i k\u00edch th\u01b0\u1edbc ban \u0111\u1ea7u, tr\u01b0\u1edbc khi s\u1ea5y c\u01b0\u1ee1ng b\u1ee9c.<\/p>\n

\u00a03.5\u00a0 \u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng gia c\u00f4ng ch\u1ebf bi\u1ebfn \u0111\u1ed3 m\u1ed9c<\/b><\/p>\n

G\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla c\u00f3 c\u1ea5u t\u1ea1o th\u1edb g\u1ed7 t\u01b0\u01a1ng \u0111\u1ed1i th\u1eb3ng, m\u1ecbn, d\u1ec5 gia c\u00f4ng. K\u1ebft qu\u1ea3 ki\u1ec3m tra b\u00e1m d\u00ednh keo v\u00e0 \u0111inh v\u00edt cho k\u1ebft qu\u1ea3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u00e1c lo\u1ea1i g\u1ed7 hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c nh\u01b0: g\u1ed7 keo l\u00e1 tr\u00e0m, g\u1ed7 re, g\u1ed7 gi\u1ed5i.<\/p>\n

Ki\u1ec3m tra b\u00e1m d\u00ednh m\u00e0ng s\u01a1n theo ph\u01b0\u01a1ng ph\u00e1p CNS 673085. K\u1ebft qu\u1ea3 \u0111\u1ea1t m\u1ee9c A2<\/sub>– \u0111\u1ed9 b\u00e1m d\u00ednh m\u00e0ng s\u01a1n t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t.<\/p>\n

C\u00e1c thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn \u0111\u1ed3 m\u1ed9c th\u00f4ng d\u1ee5ng hi\u1ec7n nay ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng trong ch\u1ebf bi\u1ebfn g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla<\/p>\n

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

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 G\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla l\u00e0 lo\u1ea1i g\u1ed7 c\u1ee9ng, c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch cao h\u01a1n c\u00e1c lo\u1ea1i g\u1ed7 keo, nh\u01b0ng m\u1ed9t s\u1ed1 \u0111\u1eb7c t\u00ednh v\u1ec1 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc (v\u00ed d\u1ee5 nh\u01b0 u\u1ed1n t\u0129nh xuy\u00ean t\u00e2m, u\u1ed1n t\u0129nh ti\u1ebfp tuy\u1ebfn.. ) th\u1ea5p h\u01a1n g\u1ed7 keo l\u00e1 tr\u00e0m.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 M\u1ee9c \u0111\u1ed9 co r\u00fat theo c\u00e1c ph\u01b0\u01a1ng ti\u1ebfp tuy\u1ebfn v\u00e0 xuy\u00ean t\u00e2m l\u1edbn h\u01a1n g\u1ed7 keo l\u00e1 tr\u00e0m. N\u1ee9t \u0111\u1ea7u (\u0111\u1ed1i v\u1edbi c\u1ea3 g\u1ed7 tr\u00f2n v\u00e0 g\u1ed7 x\u1ebb) l\u00e0 \u0111\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt v\u00e0 kh\u00f3 kh\u1eafc ph\u1ee5c nh\u1ea5t \u0111\u1ed1i v\u1edbi g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla. B\u1ea1ch \u0111\u00e0n urophylla l\u00e0m nguy\u00ean li\u1ec7u g\u1ed7 x\u1ebb ph\u1ea3i c\u00f3 tu\u1ed5i tr\u00ean 11 n\u0103m.<\/p>\n

M\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p k\u0129 thu\u1eadt nh\u1eb1m n\u00e2ng cao t\u1ec9 l\u1ec7 s\u1eed d\u1ee5ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m g\u1ed7 b\u1ea1ch \u0111\u00e0n\u00a0\u00a0 urophylla l\u00e0 nguy\u00ean li\u1ec7u g\u1ed7 x\u1ebb \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c:<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Tr\u00e1nh khai th\u00e1c g\u1ed7 v\u00e0o m\u00f9a m\u01b0a \u0111\u1ec3 h\u1ea1n ch\u1ebf s\u1ef1 t\u1ea5n c\u00f4ng c\u1ee7a m\u1ecdt n\u01b0\u1edbc. G\u1ed7 tr\u00f2n sau khi ch\u1eb7t h\u1ea1, c\u1eaft kh\u00fac ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1eef trong m\u00f4i tr\u01b0\u1eddng \u0111\u1ed9 \u1ea9m cao (tr\u00ean 80%) nh\u1eb1m ki\u1ec3m so\u00e1t s\u1ef1 tho\u00e1t n\u01b0\u1edbc trong g\u1ed7, h\u1ea1n ch\u1ebf \u0111\u00e1ng k\u1ec3 hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t \u0111\u1ea7u c\u1ee7a g\u1ed7 tr\u00f2n. Gi\u1ea3i ph\u00e1p l\u00e0 ng\u00e2m g\u1ed7 ch\u00ecm trong n\u01b0\u1edbc ho\u1eb7c ph\u1ee7 b\u1ea1t v\u00e0 phun n\u01b0\u1edbc b\u00ean trong nh\u1eb1m gi\u1eef g\u1ed7 trong m\u00f4i tr\u01b0\u1eddng \u0111\u1ed9 \u1ea9m cao h\u01a1n \u0111\u1ed9 \u1ea9m trong g\u1ed7.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Hong ph\u01a1i tr\u01b0\u1edbc khi s\u1ea5y l\u00e0 c\u1ea7n thi\u1ebft nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c hong ph\u01a1i t\u1ef1 nhi\u00ean ngo\u00e0i tr\u1eddi m\u00e0 ph\u1ea3i hong ph\u01a1i c\u00f3 \u0111i\u1ec1u ti\u1ebft m\u1ee9c \u0111\u1ed9 tho\u00e1t \u1ea9m cho g\u1ed7 x\u1ebb. N\u1ebfu kh\u00f4ng c\u00f3 nh\u00e0 \u0111i\u1ec1u ti\u1ebft m\u00f4i tr\u01b0\u1eddng \u1ea9m, c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng gi\u1ea3i ph\u00e1p nh\u01b0 \u0111\u1ec1 t\u00e0i \u0111\u00e3 th\u1ef1c hi\u1ec7n: hong ph\u01a1i c\u00f3 ph\u1ee7 b\u1ea1t cho \u0111\u1ed1ng g\u1ed7 \u0111\u1ec3 trong nh\u00e0 c\u00f3 m\u00e1i che, ki\u1ec3m tra \u0111\u1ed9 \u1ea9m trong g\u1ed7 v\u00e0 kh\u00f4ng \u0111\u1ec3 \u0111\u1ed9 \u1ea9m g\u1ed7 xu\u1ed1ng th\u1ea5p h\u01a1n 40% (trong kho\u1ea3ng 40% \u0111\u1ebfn 45%). M\u1ee5c d\u00edch nh\u1eb1m h\u1ea1n ch\u1ebf n\u1ee9t \u0111\u1ea7u v\u00e0 mo-m\u00f3p v\u00e1n x\u1ebb.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 G\u1ed7 \u0111\u01b0\u1ee3c s\u1ea5y b\u1eb1ng l\u00f2 s\u1ea5y h\u01a1i n\u01b0\u1edbc, ch\u1ebf \u0111\u1ed9 s\u1ea5y m\u1ec1m.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00f4ng \u0111o\u1ea1n b\u1ea3o qu\u1ea3n g\u1ed7 tr\u00f2n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef g\u1ed7 tr\u01b0\u1edbc khi x\u1ebb. B\u1ea3o qu\u1ea3n g\u1ed7 x\u1ebb c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n ngay sau khi x\u1ebb trong qu\u00e1 tr\u00ecnh hong ph\u01a1i, nh\u01b0 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p k\u1ebft h\u1ee3p ki\u1ec3m so\u00e1t \u0111\u1ed9 \u1ea9m c\u1ee7a s\u1ea3n ph\u1ea9m, c\u1ee7a m\u00f4i tr\u01b0\u1eddng\u00a0 nh\u1eb1m h\u1ea1n ch\u1ebf bi\u1ebfn d\u1ea1ng c\u1ee7a g\u1ed7 x\u1ebb.<\/p>\n

–\u00a0\u00a0\u00a0 S\u1ea3n ph\u1ea9m m\u1ed9c l\u00e0m t\u1eeb g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla c\u00f3 m\u00e0u s\u1eafc, v\u00e2n th\u1edb \u0111\u1eb9p, \u0111\u1ed9 b\u00e1m d\u00ednh v\u00e0 \u0111\u1ed9 b\u1ec1n v\u1edbi v\u1eadt li\u1ec7u trang ph\u1ee7 (m\u00e0ng s\u01a1n) \u0111\u1ea1t y\u00eau c\u1ea7u ngay c\u1ea3 khi \u0111\u00e3 x\u1eed l\u00ed b\u1ea3o qu\u1ea3n ch\u1ed1ng n\u1ea5m m\u1ed1c v\u00e0 c\u00f4ng tr\u00f9ng ph\u00e1 ho\u1ea1i.<\/p>\n

 <\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/p>\n

    \n
  1. H\u1ee9a Th\u1ecb Hu\u1ea7n.2003. M\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u quy tr\u00ecnh s\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n. T\u1ea1p ch\u00ed N\u00f4ng nghi\u1ec7p v\u00e0 ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n.<\/li>\n
  2. Nguy\u1ec5n Th\u1ecb B\u00edch Ng\u1ecdc, Nguy\u1ec5n Trong Nh\u00e2n. 2004. Nghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn b\u1ea3o qu\u1ea3n g\u1ed7 r\u1eebng tr\u1ed3ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1ec1 t\u00e0i c\u1ea5p B\u1ed9<\/li>\n
  3. Tr\u1ea7n Tu\u1ea5n Ngh\u0129a. 2003. Nghi\u00ean c\u1ee9u x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh c\u00f4ng ngh\u1ec7 v\u00e0 c\u1ea3i ti\u1ebfn thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn\u00a0 t\u1ed5ng h\u1ee3p g\u1ed7 r\u1eebng tr\u1ed3ng quy m\u00f4 nh\u1ecf \u00e1p d\u1ee5ng cho mi\u1ec1n n\u00fai. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1ec1 t\u00e0i c\u1ea5p B\u1ed9.<\/li>\n
  4. TCVN 1073-71, TCVN 1070-71; TCVN 359-70; TCVN 360-70; TCVN 361-70; TCVN 368-70; TCVN 369-70.<\/li>\n
  5. Russell washusen, Richard Northway and Nguyen Quang Trung. 2005-2008. Improving the value chain for the grown-plantation soild wood in Vietnam, China and Australia: Sawing and Drying. The ACIAR project No FST 021\/2001 report<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    Nguy\u1ec5n Quang Trung T\u00d3M T\u1eaeT G\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla (E. urophylla) l\u00e0 ngu\u1ed3n nguy\u00ean li\u1ec7u ti\u1ec1m n\u0103ng, nh\u01b0ng vi\u1ec7c s\u1eed d\u1ee5ng lo\u1ea1i g\u1ed7 n\u00e0y l\u00e0m nguy\u00ean li\u1ec7u \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c \u0111ang c\u00f2n nhi\u1ec1u h\u1ea1n ch\u1ebf. C\u00e1c nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i n\u00e0y cho th\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n urophylla c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 v\u1eadt l\u00ed […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14903"}],"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=14903"}],"version-history":[{"count":4,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14903\/revisions"}],"predecessor-version":[{"id":14905,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14903\/revisions\/14905"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=14903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=14903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=14903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}