{"id":8740,"date":"2009-03-24T04:25:31","date_gmt":"2009-03-23T21:25:31","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/ket-qua-giam-hom-vu-huong-phuc-vu-bao-ton-nguon-gen-cay-rung\/"},"modified":"2019-09-24T11:03:02","modified_gmt":"2019-09-24T04:03:02","slug":"ket-qua-giam-hom-vu-huong-phuc-vu-bao-ton-nguon-gen-cay-rung","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-giam-hom-vu-huong-phuc-vu-bao-ton-nguon-gen-cay-rung\/","title":{"rendered":"K\u1ebft qu\u1ea3 gi\u00e2m hom V\u00f9 h\u01b0\u01a1ng ph\u1ee5c v\u1ee5 b\u1ea3o t\u1ed3n ngu\u1ed3n gen c\u00e2y r\u1eebng"},"content":{"rendered":"

K\u1ebft qu\u1ea3 gi\u00e2m hom V\u00f9 h\u01b0\u01a1ng<\/h1>\n

ph\u1ee5c v\u1ee5 b\u1ea3o t\u1ed3n ngu\u1ed3n gen c\u00e2y r\u1eebng<\/strong><\/p>\n

Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a, Nguy\u1ec5n V\u0103n Th\u1ecd<\/em><\/strong><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em><\/p>\n

V\u00f9 h\u01b0\u01a1ng c\u00f2n g\u1ecdi l\u00e0 G\u00f9 h\u01b0\u01a1ng, c\u00f3 t\u00ean khoa h\u1ecdc l\u00e0 Cinnamomum balansae<\/em> H.Lec, thu\u1ed9c h\u1ecd Re (Lauraceae), l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn, cao t\u1edbi 20 \u2013 30m, \u0111\u01b0\u1eddng k\u00ednh c\u00f3 th\u1ec3 \u0111\u1ea1t tr\u00ean 1m. H\u1ea1t, g\u1ed7, r\u1ec5 v\u00e0 v\u1ecf c\u00f3 tinh d\u1ea7u th\u01a1m (c\u00f3 nhi\u1ec1u \u1edf v\u1ecf v\u00e0 h\u1ea1t), \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u1ea3n xu\u1ea5t x\u00e0 ph\u00f2ng v\u00e0 d\u1ea7u nh\u1eddn, s\u1ea3n xu\u1ea5t tinh d\u1ea7u x\u00e1 x\u1ecb; g\u1ed7 t\u1ed1t kh\u00f4ng m\u1ed1i m\u1ecdt c\u00f3 m\u00f9i th\u01a1m (m\u00f9i long n\u00e3o) n\u00ean \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng trong \u0111\u00f3ng \u0111\u1ed3 g\u1ed7 gia d\u1ee5ng. Lo\u00e0i c\u00e2y c\u00f3 ph\u00e2n b\u1ed1 r\u1ea3i r\u00e1c \u1edf khu v\u1ef1c \u0111\u1ed3i, n\u00fai th\u1ea5p c\u1ee7a c\u1ee7a c\u00e1c t\u1ec9nh ph\u00eda B\u1eafc. Hi\u1ec7n nay, s\u1ed1 l\u01b0\u1ee3ng c\u00e2y v\u00f9 h\u01b0\u01a1ng c\u00f2n r\u1ea5t \u00edt, ch\u1ec9 c\u00f2n th\u1ea5y \u1edf VQG C\u00fac Ph\u01b0\u01a1ng (Ninh B\u00ecnh), Ba V\u00ec (H\u00e0 T\u00e2y), trong r\u1eebng th\u1ee9 sinh v\u00e0 v\u01b0\u1eddn h\u1ed9 \u1edf Th\u1ea1ch Th\u00e0nh (Thanh Ho\u00e1) v\u00e0 r\u1ea3i r\u00e1c \u1edf m\u1ed9t s\u1ed1 n\u01a1i; song hi\u1ec7n nay \u0111\u00e3 b\u1ecb khai th\u00e1c qu\u00e1 m\u1ee9c, kh\u00f4ng c\u00f2n g\u1eb7p nhi\u1ec1u trong r\u1eebng t\u1ef1 nhi\u00ean n\u00ean \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o lo\u1ea1i hi\u1ebfm (B\u1ed9 Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 v\u00e0 M\u00f4i tr\u01b0\u1eddng, 1996). Kh\u00f3 t\u00ecm th\u1ea5y c\u00e2y c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn v\u00e0 kh\u00f4ng ph\u1ea3i c\u00e2y tr\u01b0\u1edfng th\u00e0nh n\u00e0o c\u0169ng c\u00f3 qu\u1ea3, thu h\u00e1i h\u1ea1t gi\u1ed1ng \u1edf c\u00e2y l\u1edbn r\u1ea5t kh\u00f3 kh\u0103n, m\u1eb7t kh\u00e1c do h\u1ea1t c\u00f3 ch\u1ee9a nhi\u1ec1u tinh d\u1ea7u, nhanh m\u1ea5t s\u1ee9c n\u1ea3y m\u1ea7m, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m th\u1ea5p, cho n\u00ean vi\u1ec7c th\u1eed nghi\u1ec7m nh\u00e2n gi\u1ed1ng b\u1eb1ng hom \u0111\u1ec3 g\u00f3p ph\u1ea7n l\u01b0u gi\u1eef ngu\u1ed3n gen l\u00e0 h\u1ebft s\u1ee9c c\u1ea7n thi\u1ebft.<\/p>\n

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

1.1. V\u1eadt li\u1ec7u gi\u00e2m hom<\/em><\/strong>: Hom \u0111\u1ea7u c\u00e0nh kh\u00f4ng c\u00f3 hoa, qu\u1ea3 \u0111\u01b0\u1ee3c thu h\u00e1i t\u1ea1i C\u1ea7u Hai (Ph\u00fa Th\u1ecd) t\u1eeb c\u00e1c c\u00e2y m\u1ecdc r\u1ea3i r\u00e1c trong r\u1eebng v\u00e0 v\u01b0\u1eddn h\u1ed9. Hom \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb c\u00e2y m\u1eb9 kho\u1ea3ng c\u00f3 D1,3<\/sub> 35cm, chi\u1ec1u cao 12m (kho\u1ea3ng 15 n\u0103m tu\u1ed5i), th\u1eddi gian th\u00ed nghi\u1ec7m t\u1eeb th\u00e1ng 9 \u0111\u1ebfn th\u00e1ng 12\/2003.<\/p>\n

1.2. Thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5<\/em><\/strong>: S\u1eed d\u1ee5ng 4 lo\u1ea1i thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 l\u00e0: AIA (axit indol axetic), AIB (axit indol butiric), ANA (axit naphtalen axetic) v\u00e0 ABT1 \u1edf d\u1ea1ng b\u1ed9t, tr\u1ed9n v\u1edbi than ho\u1ea1t t\u00ednh \u1edf c\u00e1c n\u1ed3ng \u0111\u1ed9: 0,5; 1,0; 1,5 ; 2,0 %. \u0110\u1ed1i ch\u1ee9ng l\u00e0 c\u00e1c hom kh\u00f4ng x\u1eed l\u00fd v\u1edbi c\u00e1c ch\u1ea5t k\u00edch th\u00edch tr\u00ean.<\/p>\n

2. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u<\/strong><\/p>\n

C\u00e1c s\u1ed1 li\u1ec7u thu th\u1eadp \u0111\u01b0\u1ee3c t\u1ea1i Bi\u1ec3u 1 cho th\u1ea5y v\u00f9 h\u01b0\u01a1ng c\u00f3 kh\u1ea3 n\u0103ng ra r\u1ec5 ngay c\u1ea3 khi kh\u00f4ng c\u00f3 thu\u1ed1c k\u00edch th\u00edch, m\u1eb7c d\u00f9 t\u1ef7 l\u1ec7 ra r\u1ec5 ch\u1ec9 \u0111\u1ea1t 40%. Thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 sau khi x\u1eed l\u00fd \u0111\u00e3 l\u00e0m t\u0103ng \u0111ang k\u1ec3 t\u1ef7 l\u1ec7 ra r\u1ec5 c\u1ee7a hom v\u00f9 h\u01b0\u01a1ng l\u00ean \u0111\u1ebfn 1,5 \u2013 2,0 l\u1ea7n; trong \u0111\u00f3 thu\u1ed1c AIA n\u1ed3ng \u0111\u1ed9 0,5 \u2013 1,5% cho t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t t\u1eeb 70 \u2013 80% t\u1ed5ng s\u1ed1 hom gi\u00e2m, ABT n\u1ed3ng \u0111\u1ed9 1 \u2013 2% \u0111\u1ea1t 60 \u2013 80% ra r\u1ec5. Hai lo\u1ea1i thu\u1ed1c ABT v\u00e0 AIA c\u00f3 h\u1ea7u h\u1ebft c\u00e1c c\u00f4ng th\u1ee9c \u0111\u1ea1t t\u1ef7 l\u1ec7 ra r\u1ec5 tr\u00ean 60%, \u0111\u1ee7 ti\u00eau chu\u1ea9n gi\u00e2m hom cho s\u1ea3n xu\u1ea5t.<\/p>\n

Ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 r\u1ec5 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 qua c\u00e1c ch\u1ec9 ti\u00eau: s\u1ed1 r\u1ec5 trung b\u00ecnh, chi\u1ec1u d\u00e0i trung b\u00ecnh c\u1ee7a r\u1ec5 v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 c\u1ee7a r\u1ec5 d\u00e0i nh\u1ea5t. K\u1ebft qu\u1ea3 cho th\u1ea5y kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m nh\u01b0ng h\u1ea7u h\u1ebft c\u00e1c c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c x\u1eed l\u00fd thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 \u0111\u1ec1u c\u00f3 b\u1ed9 r\u1ec5 t\u1ed1t h\u01a1n c\u00f4ng th\u1ee9c \u0111\u1ed1i ch\u1ee9ng.<\/p>\n

Bi\u1ec3u 1. T\u1ef7 l\u1ec7 ra r\u1ec5 \u1edf c\u00e1c c\u00f4ng th\u1ee9c gi\u00e2m hom<\/em><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
C\u00f4ng th\u1ee9c<\/strong><\/td>\nN\u1ed3ng \u0111\u1ed9 (%)<\/strong><\/td>\nS\u1ed1 l\u01b0\u1ee3ng c\u00e0nh gi\u00e2m<\/strong><\/td>\nRa r\u1ec5<\/strong><\/td>\nRa m\u00f4 seo<\/strong><\/td>\nCh\u1ebft<\/strong><\/td>\n<\/tr>\n
N<\/strong><\/td>\n%<\/strong><\/td>\nN<\/strong><\/td>\n%<\/strong><\/td>\nN<\/strong><\/td>\n%<\/strong><\/td>\n<\/tr>\n
\u0110\u1ed1i ch\u1ee9ng<\/td>\n20<\/td>\n8<\/td>\n40<\/td>\n1<\/td>\n5<\/td>\n11<\/td>\n55<\/td>\n<\/tr>\n
0,5<\/td>\n20<\/td>\n9<\/td>\n45<\/td>\n0<\/td>\n0<\/td>\n11<\/td>\n55<\/td>\n<\/tr>\n
ANA<\/td>\n1,0<\/td>\n20<\/td>\n8<\/td>\n40<\/td>\n3<\/td>\n15<\/td>\n9<\/td>\n45<\/td>\n<\/tr>\n
1,5<\/td>\n20<\/td>\n10<\/td>\n50<\/td>\n4<\/td>\n20<\/td>\n6<\/td>\n30<\/td>\n<\/tr>\n
2,0<\/td>\n20<\/td>\n9<\/td>\n45<\/td>\n2<\/td>\n10<\/td>\n9<\/td>\n45<\/td>\n<\/tr>\n
0,5<\/td>\n20<\/td>\n11<\/td>\n55<\/td>\n2<\/td>\n10<\/td>\n7<\/td>\n35<\/td>\n<\/tr>\n
AIB<\/td>\n1,0<\/td>\n20<\/td>\n12<\/td>\n60<\/td>\n3<\/td>\n15<\/td>\n5<\/td>\n25<\/td>\n<\/tr>\n
1,5<\/td>\n20<\/td>\n8<\/td>\n40<\/td>\n4<\/td>\n20<\/td>\n8<\/td>\n40<\/td>\n<\/tr>\n
2,0<\/td>\n20<\/td>\n12<\/td>\n60<\/td>\n0<\/td>\n0<\/td>\n8<\/td>\n40<\/td>\n<\/tr>\n
0,5<\/td>\n20<\/td>\n14<\/td>\n70<\/td>\n2<\/td>\n10<\/td>\n4<\/td>\n20<\/td>\n<\/tr>\n
AIA<\/td>\n1,0<\/td>\n20<\/td>\n14<\/td>\n70<\/td>\n0<\/td>\n0<\/td>\n6<\/td>\n30<\/td>\n<\/tr>\n
1,5<\/td>\n20<\/td>\n16<\/td>\n80<\/td>\n3<\/td>\n15<\/td>\n1<\/td>\n5<\/td>\n<\/tr>\n
2,0<\/td>\n20<\/td>\n9<\/td>\n45<\/td>\n5<\/td>\n25<\/td>\n6<\/td>\n30<\/td>\n<\/tr>\n
0,5<\/td>\n20<\/td>\n9<\/td>\n45<\/td>\n0<\/td>\n0<\/td>\n11<\/td>\n55<\/td>\n<\/tr>\n
ABT1<\/td>\n1,0<\/td>\n20<\/td>\n15<\/td>\n75<\/td>\n2<\/td>\n10<\/td>\n3<\/td>\n15<\/td>\n<\/tr>\n
1,5<\/td>\n20<\/td>\n16<\/td>\n80<\/td>\n1<\/td>\n5<\/td>\n3<\/td>\n15<\/td>\n<\/tr>\n
2,0<\/td>\n20<\/td>\n12<\/td>\n60<\/td>\n2<\/td>\n10<\/td>\n6<\/td>\n30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Bi\u1ec3u 2. Ch\u1ea5t l\u01b0\u1ee3ng r\u1ec5 c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c gi\u00e2m hom<\/em><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
C\u00f4ng th\u1ee9c<\/strong><\/td>\nN\u1ed3ng \u0111\u1ed9 (%)<\/strong><\/td>\nS\u1ed1 r\u1ec5 Trung b\u00ecnh tr\u00ean hom<\/strong><\/td>\nChi\u1ec1u d\u00e0i Trung b\u00ecnh r\u1ec5 (cm)<\/strong><\/td>\nChi\u1ec1u d\u00e0i r\u1ec5 d\u00e0i nh\u1ea5t (cm)<\/strong><\/td>\nS\u1ed1 r\u1ec5 nhi\u1ec1u nh\u1ea5t tr\u00ean hom<\/strong><\/td>\n<\/tr>\n
\u0110\u1ed1i ch\u1ee9ng<\/td>\n1,11<\/td>\n3,22<\/td>\n4,1<\/td>\n3<\/td>\n<\/tr>\n
0,5<\/td>\n4,00<\/td>\n2,49<\/td>\n5,7<\/td>\n6<\/td>\n<\/tr>\n
ANA<\/td>\n1,0<\/td>\n1,45<\/td>\n3,47<\/td>\n8,4<\/td>\n4<\/td>\n<\/tr>\n
1,5<\/td>\n0,86<\/td>\n2,63<\/td>\n4,0<\/td>\n4<\/td>\n<\/tr>\n
2,0<\/td>\n1,55<\/td>\n1,89<\/td>\n2,5<\/td>\n6<\/td>\n<\/tr>\n
0,5<\/td>\n1,85<\/td>\n1,86<\/td>\n5,2<\/td>\n4<\/td>\n<\/tr>\n
AIB<\/td>\n1,0<\/td>\n1,13<\/td>\n1,76<\/td>\n2,9<\/td>\n4<\/td>\n<\/tr>\n
1,5<\/td>\n1,82<\/td>\n3,44<\/td>\n9,0<\/td>\n4<\/td>\n<\/tr>\n
2,0<\/td>\n3,45<\/td>\n3,47<\/td>\n5,8<\/td>\n6<\/td>\n<\/tr>\n
0,5<\/td>\n1,12<\/td>\n1,68<\/td>\n3,8<\/td>\n4<\/td>\n<\/tr>\n
AIA<\/td>\n1,0<\/td>\n2,29<\/td>\n2,93<\/td>\n7,6<\/td>\n4<\/td>\n<\/tr>\n
1,5<\/td>\n2,68<\/td>\n2,65<\/td>\n7,5<\/td>\n6<\/td>\n<\/tr>\n
2,0<\/td>\n1,20<\/td>\n3,46<\/td>\n5,5<\/td>\n3<\/td>\n<\/tr>\n
0,5<\/td>\n2,11<\/td>\n2,38<\/td>\n3,9<\/td>\n7<\/td>\n<\/tr>\n
ABT1<\/td>\n1,0<\/td>\n2,06<\/td>\n1,37<\/td>\n3,2<\/td>\n5<\/td>\n<\/tr>\n
1,5<\/td>\n1,76<\/td>\n2,13<\/td>\n6,0<\/td>\n8<\/td>\n<\/tr>\n
2,0<\/td>\n2,57<\/td>\n2,30<\/td>\n5,1<\/td>\n5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

3. K\u1ebft lu\u1eadn v\u00e0 ki\u1ebfn ngh\u1ecb<\/strong><\/p>\n

S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam (B\u1ed9 Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 v\u00e0 M\u00f4i tr\u01b0\u1eddng, 1996) x\u1ebfp h\u1ea1ng v\u00f9 h\u01b0\u01a1ng v\u00e0o h\u1ea1ng b\u1ecb \u0111e do\u1ea1 (lo\u00e0i hi\u1ebfm R) n\u00ean c\u1ea7n mau ch\u00f3ng \u0111\u01b0\u1ee3c b\u1ea3o t\u1ed3n th\u00f4ng qua vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c qu\u1ea7n th\u1ee5 b\u1ea3o t\u1ed3n ex situ<\/em> \u0111\u1ec3 c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1ee3c lo\u00e0i trong t\u01b0\u01a1ng lai. V\u00f9 h\u01b0\u01a1ng kh\u00f3 thu h\u1ea1t v\u00e0 h\u1ea1t gi\u1ed1ng c\u00f3 t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m th\u1ea5p n\u00ean gi\u00e2m hom l\u00e0 bi\u1ec7n ph\u00e1p nh\u00e2n gi\u1ed1ng hi\u1ec7u qu\u1ea3 h\u01a1n trong vi\u1ec7c nh\u00e2n gi\u1ed1ng ph\u1ee5c v\u1ee5 b\u1ea3o t\u1ed3n c\u0169ng nh\u01b0 tr\u1ed3ng r\u1eebng di\u1ec7n t\u00edch l\u1edbn sau n\u00e0y.<\/p>\n

V\u00f9 h\u01b0\u01a1ng l\u00e0 c\u00e2y d\u1ec5 ra r\u1ec5, ngay c\u1ea3 v\u1edbi c\u00e2y l\u1edbn tu\u1ed5i (15 tu\u1ed5i) kh\u00f4ng c\u00f3 ch\u1ea5t k\u00edch th\u00edch c\u0169ng cho t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t 40%. Hai ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5 l\u00e0 AIA v\u00e0 ABT1 \u0111\u1ec1u c\u00f3 nhi\u1ec1u n\u1ed3ng \u0111\u1ed9 l\u00e0m t\u0103ng \u0111\u00e1ng k\u1ec3 t\u1ef7 l\u1ec7 ra r\u1ec5, c\u00f3 khi t\u0103ng 2,0 l\u1ea7n so v\u1edbi \u0111\u1ed1i ch\u1ee9ng v\u00e0 l\u00e0 c\u00e1c ch\u1ea5t c\u00f3 hi\u1ec7u qu\u1ea3 cao nh\u1ea5t trong s\u1ed1 4 ch\u1ea5t k\u00edch th\u00edch \u0111\u00e3 s\u1eed d\u1ee5ng v\u00e0o gi\u00e2m hom. C\u00e1c ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5 \u0111\u1ec1u cho b\u1ed9 r\u1ec5 t\u1ed1t h\u01a1n so v\u1edbi \u0111\u1ed1i ch\u1ee9ng v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng r\u1ec5 tr\u00ean hom gi\u00e2m.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h3>\n

B\u1ed9 Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 v\u00e0 M\u00f4i tr\u01b0\u00ad\u1eddng, 1996. S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam, ph\u1ea7n th\u1ef1c v\u1eadt. Nh\u00e0 xu\u1ea5t b\u1ea3n Khoa h\u1ecdc v\u00e0 K\u1ef9 thu\u1eadt, H\u00e0 N\u1ed9i.<\/p>\n

Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a, 2001. Nh\u00e2n gi\u1ed1ng v\u00f4 t\u00ednh v\u00e0 tr\u1ed3ng r\u1eebng d\u00f2ng v\u00f4 t\u00ednh. Nh\u00e0 xu\u1ea5t b\u1ea3n N\u00f4ng nghi\u1ec7p, H\u00e0 N\u1ed9i.<\/p>\n

Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a v\u00e0 Tr\u1ea7n V\u0103n Ti\u1ebfn, 2002. K\u1ebft qu\u1ea3 nh\u00e2n gi\u1ed1ng hom b\u00e1ch xanh, p\u01a1 mu, th\u00f4ng \u0111\u1ecf \u1edf L\u00e2m \u0110\u1ed3ng. TC N\u00f4ng nghi\u1ec7p &PTNT, 6\/2002.<\/p>\n

Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a v\u00e0 Tr\u1ea7n V\u0103n Ti\u1ebfn, 2004. K\u1ebft qu\u1ea3 nh\u00e2n gi\u1ed1ng hom H\u1ed3ng t\u00f9ng ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng b\u1ea3o t\u1ed3n ngu\u1ed3n gen. TC N\u00f4ng nghi\u1ec7p &PTNT, 3\/2004.<\/p>\n

Summary<\/h3>\n

Cinnamomum balansae<\/em>is the rare species, which is hard to find a grown plant in the nature. As it is difficult to collect its seeds, raising and cutting is an effective method of propagation. This species generates its roots quite easily, even those grown plants (15 year old) without stimulus produce root-generating rate of 40%. Two stimulus substances are AIA and ABT1 that have great concentration to raise root-generating rate considerably, sometimes twice as high as checking one. Those stimulus substances help plants generate root sets better than checking one in term of root quantity on cutting & raising. It is possible to use the cutting propagation method to produce cutting plants, conservation and development of forests in the future.<\/p>\n","protected":false},"excerpt":{"rendered":"

K\u1ebft qu\u1ea3 giâm hom Vù h\u01b0\u01a1ng ph\u1ee5c v\u1ee5 b\u1ea3o t\u1ed3n ngu\u1ed3n gen cây r\u1eebng Vù h\u01b0\u01a1ng còn g\u1ecdi là Gù h\u01b0\u01a1ng, có tên khoa h\u1ecdc là Cinnamomum balansae H.Lec, thu\u1ed9c h\u1ecd Re (Lauraceae), là loài cây g\u1ed7 l\u1edbn, cao t\u1edbi 20 – 30m, \u0111\u01b0\u1eddng kính có th\u1ec3 \u0111\u1ea1t trên 1m. H\u1ea1t, g\u1ed7, r\u1ec5 và v\u1ecf có tinh d\u1ea7u th\u01a1m (có nhi\u1ec1u \u1edf v\u1ecf và h\u1ea1t), \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u1ea3n xu\u1ea5t xà phòng và d\u1ea7u nh\u1eddn, s\u1ea3n xu\u1ea5t tinh d\u1ea7u xá x\u1ecb; g\u1ed7 t\u1ed1t không m\u1ed1i m\u1ecdt có mùi th\u01a1m (mùi long não) nên \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng trong \u0111óng \u0111\u1ed3 g\u1ed7 gia d\u1ee5ng. Loài cây có phân b\u1ed1 r\u1ea3i rác \u1edf khu v\u1ef1c \u0111\u1ed3i, núi th\u1ea5p c\u1ee7a c\u1ee7a các t\u1ec9nh phía B\u1eafc. Hi\u1ec7n nay, s\u1ed1 l\u01b0\u1ee3ng cây vù h\u01b0\u01a1ng còn r\u1ea5t ít, ch\u1ec9 còn th\u1ea5y \u1edf VQG Cúc Ph\u01b0\u01a1ng (Ninh Bình), Ba Vì (Hà Tây), trong r\u1eebng th\u1ee9 sinh và v\u01b0\u1eddn h\u1ed9 \u1edf Th\u1ea1ch Thành (Thanh Hoá) và r\u1ea3i rác \u1edf m\u1ed9t s\u1ed1 n\u01a1i; song hi\u1ec7n nay \u0111ã b\u1ecb khai thác quá m\u1ee9c, không còn g\u1eb7p nhi\u1ec1u trong r\u1eebng t\u1ef1 nhiên nên \u0111\u01b0\u1ee3c x\u1ebfp vào lo\u1ea1i hi\u1ebfm (B\u1ed9 Khoa h\u1ecdc Công ngh\u1ec7 và Môi tr\u01b0\u1eddng, 1996). Khó tìm th\u1ea5y cây có kích th\u01b0\u1edbc l\u1edbn và không ph\u1ea3i cây tr\u01b0\u1edfng thành nào c\u0169ng có qu\u1ea3, thu hái h\u1ea1t gi\u1ed1ng \u1edf cây l\u1edbn r\u1ea5t khó kh\u0103n, m\u1eb7t khác do h\u1ea1t có ch\u1ee9a nhi\u1ec1u tinh d\u1ea7u, nhanh m\u1ea5t s\u1ee9c n\u1ea3y m\u1ea7m, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m th\u1ea5p, cho nên vi\u1ec7c th\u1eed nghi\u1ec7m nhân gi\u1ed1ng b\u1eb1ng hom \u0111\u1ec3 góp ph\u1ea7n l\u01b0u gi\u1eef ngu\u1ed3n gen là h\u1ebft s\u1ee9c c\u1ea7n thi\u1ebft. <\/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\/8740"}],"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=8740"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8740\/revisions"}],"predecessor-version":[{"id":19091,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8740\/revisions\/19091"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}