{"id":475,"date":"2005-07-16T05:33:46","date_gmt":"2005-07-16T05:33:46","guid":{"rendered":"http:\/\/vafs.dungnq.local\/2005\/07\/16\/ket-qua-giam-hom-re-huong-phuc-vu-trong-rung-bao-ton-nguon-gen-2\/"},"modified":"2013-10-07T11:23:14","modified_gmt":"2013-10-07T04:23:14","slug":"ket-qua-giam-hom-re-huong-phuc-vu-trong-rung-bao-ton-nguon-gen-2","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-giam-hom-re-huong-phuc-vu-trong-rung-bao-ton-nguon-gen-2\/","title":{"rendered":"K\u1ebfT QU\u1ea3 GI\u00c2M HOM re h\u01b0\u01a1ng ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng b\u1ea3o t\u1ed3n ngu\u1ed3n gen"},"content":{"rendered":"
Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a, Tr\u1ea7n V\u0103n Ti\u1ebfn<\/i><\/h5>\n

 <\/p>\n

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

\n

 <\/p>\n

Re h\u01b0\u01a1ng c\u00f3 t\u00ean khoa h\u1ecdc l\u00e0 Cinnamomum parthenoxylon<\/i> Meisn, thu\u1ed9c h\u1ecd Long n\u00e3o (Lauraceae), l\u00e0 lo\u00e0i c\u00e2y l\u1ea5y g\u1ed7 k\u1ebft h\u1ee3p l\u1ea5y tinh d\u1ea7u, c\u00f3 ph\u00e2n b\u1ed1 r\u1ea3i r\u00e1c ch\u1ee7 y\u1ebfu \u1edf c\u00e1c t\u1ec9nh mi\u1ec1n Trung v\u00e0 T\u00e2y Nguy\u00ean. M\u1eb7c d\u00f9 c\u00f3 ph\u00e2n b\u1ed1 kh\u00e1 r\u1ed9ng song kh\u00f4ng t\u1eadp trung, l\u1ea1i b\u1ecb khai th\u00e1c m\u1ea1nh k\u1ec3 c\u1ea3 ch\u1eb7t c\u00e2y, l\u00e1 v\u00e0 \u0111\u00e0o c\u1ea3 r\u1ec5 \u0111\u1ec3 cung c\u1ea5p tinh d\u1ea7u x\u00e1 x\u1ecb n\u00ean re h\u01b0\u01a1ng \u0111ang \u0111\u1ee9ng tr\u01b0\u1edbc nguy c\u01a1 b\u1ecb ti\u00eau di\u1ec7t v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c ghi v\u00e0o S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam (1996). Do c\u00e2y \u0111\u00e3 b\u1ecb khai th\u00e1c t\u00e0n ki\u1ec7t n\u00ean kh\u00f3 t\u00ecm th\u1ea5y c\u00e2y tr\u01b0\u1edfng th\u00e0nh \u0111\u1ec3 thu h\u00e1i gi\u1ed1ng gieo \u01b0\u01a1m ph\u1ee5c v\u1ee5 cho c\u00e1c nhu c\u1ea7u tr\u1ed3ng r\u1eebng v\u00e0 b\u1ea3o t\u1ed3n. Hi\u1ec7n nay m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba qu\u00fd c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u00e2n gi\u1ed1ng th\u00e0nh c\u00f4ng b\u1eb1ng hom v\u00e0 b\u01b0\u1edbc \u0111\u1ea7u tr\u1ed3ng r\u1eebng c\u00e2y hom c\u00f3 tri\u1ec3n v\u1ecdng nh\u01b0 b\u00e1ch xanh, p\u01a1 mu, th\u00f4ng \u0111\u1ecf, h\u1ed3ng t\u00f9ng \u1edf L\u00e2m \u0110\u1ed3ng (Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a v\u00e0 Tr\u1ea7n V\u0103n Ti\u1ebfn, 2002; 2004), do v\u1eady re h\u01b0\u01a1ng c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng th\u1eed nghi\u1ec7m gi\u00e2m hom v\u00e0 g\u00e2y tr\u1ed3ng r\u1eebng b\u1eb1ng c\u00e2y hom trong v\u00e0i n\u0103m g\u1ea7n \u0111\u00e2y.<\/p>\n

 <\/p>\n

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

 <\/p>\n

1.1. V\u1eadt li\u1ec7u gi\u00e2m hom<\/b>: Hom ch\u1ed3i c\u1ee7a lo\u00e0i re h\u01b0\u01a1ng (Cinnamomum parthenoxylon<\/i> Meisn) thu t\u1ea1i L\u00e2m \u0110\u1ed3ng t\u1eeb r\u1eebng t\u1ef1 nhi\u00ean \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m gi\u00e2m hom l\u00e0m c\u00e2y \u0111\u1ea7u d\u00f2ng v\u00e0 tr\u1ed3ng v\u00e0o v\u01b0\u1eddn cung c\u1ea5p hom. Sau 2 n\u0103m tr\u1ed3ng, c\u00e2y cho m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng hom \u0111\u1ee7 l\u1edbn n\u00ean \u0111\u00e3 \u0111\u01b0\u1ee3c thu \u0111\u1ec3 b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m.<\/p>\n

Th\u1eddi gian th\u00ed nghi\u1ec7m: T\u1eeb th\u00e1ng 5 n\u0103m 2003 \u0111\u1ebfn th\u00e1ng 4 n\u0103m 2004, tr\u00ean gi\u00e1 th\u1ec3 c\u00e1t, t\u1ea1i nh\u00e0 k\u00ednh v\u00e0 v\u01b0\u1eddn \u01b0\u01a1m Trung t\u00e2m L\u00e2m sinh L\u00e2m \u0110\u1ed3ng (th\u00e0nh ph\u1ed1 \u0110\u00e0 L\u1ea1t), thu\u1ed9c Vi\u1ec7n KH L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam. Do kh\u00ed h\u1eadu quanh n\u0103m m\u00e1t m\u1ebb v\u00e0 \u0111i\u1ec1u ki\u1ec7n gi\u00e2m hom trong nh\u00e0 k\u00ednh \u1ed5n \u0111\u1ecbnh n\u00ean nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng hom \u0111\u00e3 th\u1ef1c hi\u1ec7n cho hai m\u00f9a ch\u00ednh l\u00e0 m\u00f9a m\u01b0a (th\u00e1ng 5 \u0111\u1ebfn th\u00e1ng 9 – 2003) v\u00e0 m\u00f9a kh\u00f4 (th\u00e1ng 1 \u0111\u1ebfn th\u00e1ng 4 – 2004).<\/p>\n

 <\/p>\n

1.2. C\u00e1c thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5<\/b>: Ba lo\u1ea1i thu\u1ed1c ra r\u1ec5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 AIA (axit indol axetic), AIB (axit indol butiric) v\u00e0 ANA (axit naphtalen axetic) \u1edf d\u1ea1ng b\u1ed9t v\u1edbi c\u00e1c n\u1ed3ng \u0111\u1ed9 0,5; 1,0 v\u00e0 1,5%. \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 ra r\u1ec5 n\u00eau tr\u00ean. C\u00e1c hom \u0111\u01b0\u1ee3c nh\u00fang v\u00e0o thu\u1ed1c b\u1ed9t theo c\u00e1c n\u1ed3ng \u0111\u1ed9 kh\u00e1c nhau, sau \u0111\u00f3 \u0111\u01b0\u1ee3c c\u1ea5y v\u00e0o gi\u00e1 th\u1ec3 c\u00e1t trong nh\u00e0 k\u00ednh.<\/p>\n

 <\/p>\n

1.3. S\u1ed1 li\u1ec7u<\/b>: C\u00e1c s\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp l\u00e0 th\u1eddi gian ra r\u1ec5, t\u1ef7 l\u1ec7 ra r\u1ec5 (%), chi\u1ec1u d\u00e0i r\u1ec5 d\u00e0i nh\u1ea5t v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 (b\u1eb1ng c\u00e1ch nh\u00e2n s\u1ed1 l\u01b0\u1ee3ng r\u1ec5 tr\u00ean hom v\u1edbi chi\u1ec1u d\u00e0i r\u1ec5 d\u00e0i nh\u1ea5t).<\/p>\n

 <\/p>\n

2. K\u1ebft qu\u1ea3<\/p>\n

2.1. K\u1ebft qu\u1ea3 gi\u00e2m hom m\u00f9a m\u01b0a<\/b>(th\u00e1ng 5 \u0111\u1ebfn th\u00e1ng 9\/2003<\/b>)<\/p>\n

 <\/p>\n

C\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y t\u1eeb B\u1ea3ng 1 l\u00e0 v\u00e0o m\u00f9a kh\u00f4, kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5 th\u00ec gi\u00e2m hom re h\u01b0\u01a1ng c\u0169ng cho k\u1ebft qu\u1ea3 kh\u1ea3 quan, v\u00ec \u0111\u1ed1i ch\u1ee9ng cho t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t 50%, trong khi c\u00e1c ch\u1ea5t k\u00edch th\u00edch l\u1ea1i \u0111em l\u1ea1i t\u1ef7 l\u1ec7 th\u1ea5p h\u01a1n, cao nh\u1ea5t c\u0169ng ch\u1ec9 \u0111\u1ea1t 45%. \u0110i\u1ec1u \u0111\u00e1ng l\u01b0u \u00fd l\u00e0 th\u1eddi gian ra r\u1ec5 k\u00e9o d\u00e0i t\u1edbi 4 th\u00e1ng v\u00e0 t\u1ef7 l\u1ec7 ra m\u00f4 s\u1eb9o c\u1ee7a c\u00e1c ch\u1ea5t k\u00edch th\u00edch l\u1ea1i l\u1edbn h\u01a1n nhi\u1ec1u.<\/p>\n

X\u00e9t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 r\u1ec5 th\u00ec c\u00e1c ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5 AIB v\u00e0 ANA n\u1ed3ng \u0111\u1ed9 cao (1 v\u00e0 1,5%) cho s\u1ed1 l\u01b0\u1ee3ng r\u1ec5 tr\u00ean hom cao nh\u1ea5t v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 d\u00e0i nh\u1ea5t. S\u1ed1 r\u1ec5 nhi\u1ec1u v\u00e0 r\u1ec5 d\u00e0i t\u1ea1o \u0111i\u1ec1u ki\u1ec7n t\u1ed1t nh\u1ea5t cho c\u00e2y hom sinh tr\u01b0\u1edfng \u1ed5n \u0111\u1ecbnh khi \u0111\u01b0\u1ee3c tr\u1ed3ng ra ngo\u00e0i hi\u1ec7n tr\u01b0\u1eddng. Ch\u1ec9 s\u1ed1 ra r\u1ec5 c\u1ee7a 4 c\u00f4ng th\u1ee9c tr\u00ean \u0111\u1ec1u \u0111\u1ea1t cao nh\u1ea5t.<\/p>\n

 <\/p>\n

B\u1ea3ng 1: T\u1ef7 l\u1ec7 ra r\u1ec5 \u1edf c\u00e1c c\u00f4ng th\u1ee9c gi\u00e2m hom<\/i> <\/span><\/h6>\n

 <\/p>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n
\nC\u00f4ng th\u1ee9c<\/b><\/p>\n

\n<\/td>\n

\n

N\u1ed3ng \u0111\u1ed9<\/b><\/p>\n

(%)<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 l\u01b0\u1ee3ng<\/b><\/p>\n

c\u00e0nh gi\u00e2m<\/b><\/p>\n<\/td>\n

\n

T\u1ef7 l\u1ec7<\/span><\/h2>\n<\/td>\n<\/tr>\n

\n

Ra r\u1ec5<\/span><\/h1>\n<\/td>\n

\n

M\u00f4 s\u1eb9o<\/b><\/p>\n<\/td>\n

\n

Ch\u1ebft<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

N<\/b><\/p>\n<\/td>\n

\n

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

\n

N<\/b><\/p>\n<\/td>\n

\n

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

\n

N<\/b><\/p>\n<\/td>\n

\n

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

\n\u0110\u1ed1i ch\u1ee9ng<\/td>\n\n

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

\n

20<\/p>\n<\/td>\n

\n

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

\n

50<\/b><\/p>\n<\/td>\n

\n

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

\n

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

\n

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

\n

40<\/p>\n<\/td>\n<\/tr>\n

\n

AIA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

20<\/p>\n

20<\/p>\n

20<\/p>\n<\/td>\n

\n

6<\/p>\n

7<\/p>\n

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

\n

30<\/b><\/p>\n

35<\/b><\/p>\n

25<\/b><\/p>\n<\/td>\n

\n

2<\/p>\n

9<\/p>\n

9<\/p>\n<\/td>\n

\n

10<\/p>\n

45<\/p>\n

45<\/p>\n<\/td>\n

\n

12<\/p>\n

4<\/p>\n

6<\/p>\n<\/td>\n

\n

60<\/p>\n

20<\/p>\n

30<\/p>\n<\/td>\n<\/tr>\n

\n

AIB<\/p>\n<\/td>\n

\n

0.5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

20<\/p>\n

20<\/p>\n

20<\/p>\n<\/td>\n

\n

9<\/p>\n

7<\/p>\n

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

\n

45<\/b><\/p>\n

35<\/b><\/p>\n

15<\/b><\/p>\n<\/td>\n

\n

7<\/p>\n

6<\/p>\n

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

\n

35<\/p>\n

30<\/p>\n

50<\/p>\n<\/td>\n

\n

4<\/p>\n

7<\/p>\n

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

\n

20<\/p>\n

35<\/p>\n

35<\/p>\n<\/td>\n<\/tr>\n

\n

ANA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

20<\/p>\n

20<\/p>\n

20<\/p>\n<\/td>\n

\n

4<\/p>\n

4<\/p>\n

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

\n

20<\/b><\/p>\n

20<\/b><\/p>\n

25<\/b><\/p>\n<\/td>\n

\n

6<\/p>\n

8<\/p>\n

9<\/p>\n<\/td>\n

\n

30<\/p>\n

40<\/p>\n

45<\/p>\n<\/td>\n

\n

10<\/p>\n

8<\/p>\n

6<\/p>\n<\/td>\n

\n

50<\/p>\n

40<\/p>\n

30<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

B\u1ea3ng 2: Ch\u1ea5t l\u01b0\u1ee3ng r\u1ec5 theo c\u00e1c c\u00f4ng th\u1ee9c gi\u00e2m hom<\/i> <\/span><\/h6>\n

 <\/p>\n

 <\/p>\n\n\n\n\n\n\n\n
\n

C\u00f4ng th\u1ee9c<\/b><\/p>\n<\/td>\n

\n

N\u1ed3ng \u0111\u1ed9 (%)<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 l\u01b0\u1ee3ng r\u1ec5 trung b\u00ecnh\/hom<\/b><\/p>\n<\/td>\n

\n

Chi\u1ec1u d\u00e0i r\u1ec5 d\u00e0i nh\u1ea5t (cm)<\/b><\/p>\n<\/td>\n

\n

Ch\u1ec9 s\u1ed1 ra r\u1ec5<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

\u0110\u1ed1i ch\u1ee9ng<\/p>\n<\/td>\n

\n

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

\n

3,4<\/p>\n<\/td>\n

\n

4,9<\/p>\n<\/td>\n

\n

16,66<\/p>\n<\/td>\n<\/tr>\n

\n

AIA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

1,8<\/p>\n

2,4<\/p>\n

2,4<\/p>\n<\/td>\n

\n

4<\/p>\n

5,8<\/p>\n

6,1<\/p>\n<\/td>\n

\n

7,2<\/p>\n

13,92<\/p>\n

14,64<\/p>\n<\/td>\n<\/tr>\n

\n

AIB<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

2,8<\/p>\n

3,7<\/p>\n

4,7<\/p>\n<\/td>\n

\n

5,7<\/p>\n

6,9<\/p>\n

6,7<\/p>\n<\/td>\n

\n

15,96<\/p>\n

25,53<\/p>\n

31,49<\/p>\n<\/td>\n<\/tr>\n

\n

ANA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

3,2<\/p>\n

4,3<\/p>\n

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

\n

4,2<\/p>\n

8,8<\/p>\n

7,9<\/p>\n<\/td>\n

\n

13,44<\/p>\n

37,84<\/p>\n

34,76<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

2.2. K\u1ebft qu\u1ea3 gi\u00e2m hom m\u00f9a kh\u00f4<\/b>(th\u00e1ng 1\/2004 \u0111\u1ebfn th\u00e1ng 4\/2004<\/b>)<\/p>\n

 <\/p>\n

\u0110i\u1ec1u d\u1ec5 d\u00e0ng nh\u1eadn th\u1ea5y l\u00e0 gi\u00e2m hom re h\u01b0\u01a1ng v\u00e0o m\u00f9a kh\u00f4 cho t\u1ef7 l\u1ec7 ra r\u1ec5 cao h\u01a1n h\u1eb3n m\u00f9a m\u01b0a v\u00e0 th\u1eddi gian ra r\u1ec5 ng\u1eafn h\u01a1n (ch\u1ec9 trong v\u00f2ng 3 th\u00e1ng), \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c c\u00f4ng th\u1ee9c x\u1eed l\u00fd ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5. C\u00f4ng th\u1ee9c \u0111\u1ed1i ch\u1ee9ng gi\u00e2m hom m\u00f9a kh\u00f4 cho t\u1ef7 l\u1ec7 ra r\u1ec5 b\u1eb1ng \u0111\u00fang m\u1ed9t n\u1eeda c\u1ee7a m\u00f9a m\u01b0a. C\u1ea3 3 n\u1ed3ng \u0111\u1ed9 c\u1ee7a AIA, hai n\u1ed3ng \u0111\u1ed9 th\u1ea5p (0,5 v\u00e0 1,0%) c\u1ee7a AIB v\u00e0 ANA \u0111\u1ec1u cho t\u1ef7 l\u1ec7 ra r\u1ec5 cao tr\u00ean 2 l\u1ea7n \u0111\u1ed1i ch\u1ee9ng. H\u1ea7u h\u1ebft c\u00e1c c\u00f4ng th\u1ee9c tr\u00ean \u0111\u1ec1u cho s\u1ed1 l\u01b0\u1ee3ng r\u1ec5 cao nh\u1ea5t v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 d\u00e0i nh\u1ea5t, v\u00e0 c\u0169ng nh\u01b0 v\u1eady ch\u1ec9 s\u1ed1 ra r\u1ec5 c\u0169ng l\u00e0 cao nh\u1ea5t.<\/p>\n

 <\/p>\n

B\u1ea3ng 3: T\u1ef7 l\u1ec7 ra r\u1ec5 theo c\u00e1c c\u00f4ng th\u1ee9c gi\u00e2m hom<\/i> <\/span><\/h6>\n

 <\/p>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n
\n

C\u00f4ng th\u1ee9c<\/b><\/p>\n

\n<\/td>\n

\n

N\u1ed3ng \u0111\u1ed9<\/b><\/p>\n

(%)<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 l\u01b0\u1ee3ng<\/b><\/p>\n

c\u00e0nh gi\u00e2m<\/b><\/p>\n<\/td>\n

\n

T\u1ef7 l\u1ec7<\/span><\/h2>\n<\/td>\n<\/tr>\n

\n

Ra r\u1ec5<\/span><\/h1>\n<\/td>\n

\n

M\u00f4 s\u1eb9o<\/b><\/p>\n<\/td>\n

\n

Ch\u1ebft<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

N<\/b><\/p>\n<\/td>\n

\n

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

\n

N<\/b><\/p>\n<\/td>\n

\n

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

\n

N<\/b><\/p>\n<\/td>\n

\n

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

\n\u0110\u1ed1i ch\u1ee9ng<\/td>\n\n

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

\n

20<\/p>\n<\/td>\n

\n

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

\n

25<\/p>\n<\/td>\n

\n

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

\n

25<\/p>\n<\/td>\n

\n

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

\n

50<\/p>\n<\/td>\n<\/tr>\n

\n

IAA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

20<\/p>\n

20<\/p>\n

20<\/p>\n<\/td>\n

\n

13<\/p>\n

13<\/p>\n

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

\n

65<\/p>\n

65<\/p>\n

60<\/p>\n<\/td>\n

\n

5<\/p>\n

5<\/p>\n

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

\n

25<\/p>\n

25<\/p>\n

35<\/p>\n<\/td>\n

\n

2<\/p>\n

2<\/p>\n

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

\n

10<\/p>\n

10<\/p>\n

5<\/p>\n<\/td>\n<\/tr>\n

\n

IBA<\/p>\n<\/td>\n

\n

0.5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

20<\/p>\n

20<\/p>\n

20<\/p>\n<\/td>\n

\n

10<\/p>\n

12<\/p>\n

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

\n

50<\/p>\n

60<\/p>\n

20<\/p>\n<\/td>\n

\n

6<\/p>\n

8<\/p>\n

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

\n

30<\/p>\n

40<\/p>\n

40<\/p>\n<\/td>\n

\n

4<\/p>\n

0<\/p>\n

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

\n

20<\/p>\n

0<\/p>\n

40<\/p>\n<\/td>\n<\/tr>\n

\n

NAA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

20<\/p>\n

20<\/p>\n

20<\/p>\n<\/td>\n

\n

12<\/p>\n

9<\/p>\n

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

\n

60<\/p>\n

45<\/p>\n

25<\/p>\n<\/td>\n

\n

6<\/p>\n

5<\/p>\n

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

\n

30<\/p>\n

25<\/p>\n

50<\/p>\n<\/td>\n

\n

2<\/p>\n

6<\/p>\n

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

\n

10<\/p>\n

30<\/p>\n

25<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

B\u1ea3ng 4: Ch\u1ea5t l\u01b0\u1ee3ng hom gi\u00e2m<\/i> <\/span><\/h6>\n

 <\/p>\n

 <\/p>\n\n\n\n\n\n\n\n
\n

C\u00f4ng th\u1ee9c<\/b><\/p>\n<\/td>\n

\n

N\u1ed3ng \u0111\u1ed9 (%)<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 l\u01b0\u1ee3ng r\u1ec5 trung b\u00ecnh\/hom<\/b><\/p>\n<\/td>\n

\n

Chi\u1ec1u d\u00e0i r\u1ec5 d\u00e0i nh\u1ea5t (cm)<\/b><\/p>\n<\/td>\n

\n

Ch\u1ec9 s\u1ed1 ra r\u1ec5<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

\u0110\u1ed1i ch\u1ee9ng<\/p>\n<\/td>\n

\n

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

\n

2,8<\/p>\n<\/td>\n

\n

8,4<\/p>\n<\/td>\n

\n

23,52<\/p>\n<\/td>\n<\/tr>\n

\n

IAA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

5,2<\/p>\n

3,8<\/p>\n

2,5<\/p>\n<\/td>\n

\n

8,2<\/p>\n

7,5<\/p>\n

4,5<\/p>\n<\/td>\n

\n

42,64<\/p>\n

28,5<\/p>\n

11,25<\/p>\n<\/td>\n<\/tr>\n

\n

IBA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

3<\/p>\n

3,7<\/p>\n

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

\n

7,7<\/p>\n

6,5<\/p>\n

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

\n

21,0<\/p>\n

24,05<\/p>\n

38,5<\/p>\n<\/td>\n<\/tr>\n

\n

NAA<\/p>\n<\/td>\n

\n

0,5<\/p>\n

1<\/p>\n

1,5<\/p>\n<\/td>\n

\n

7,3<\/p>\n

10,1<\/p>\n

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

\n

2,0<\/p>\n

10,9<\/p>\n

8,5<\/p>\n<\/td>\n

\n

14,6<\/p>\n

110,1<\/p>\n

42,5<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

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

 <\/p>\n

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

 <\/p>\n

Gi\u00e2m hom re h\u01b0\u01a1ng v\u00e0o m\u00f9a kh\u00f4 cho t\u1ef7 l\u1ec7 ra r\u1ec5 cao h\u01a1n h\u1eb3n so v\u1edbi m\u00f9a m\u01b0a. C\u00e1c ch\u1ea5t k\u00edch th\u00edch ra r\u1ec5 kh\u00f4ng \u0111em l\u1ea1i t\u1ef7 l\u1ec7 ra r\u1ec5 cao h\u01a1n trong m\u00f9a m\u01b0a so v\u1edbi \u0111\u1ed1i ch\u1ee9ng, ng\u01b0\u1ee3c l\u1ea1i h\u1ea7u h\u1ebft c\u00e1c c\u00f4ng th\u1ee9c x\u1eed l\u00fd \u0111\u1ec1u ra r\u1ec5 v\u1edbi t\u1ef7 l\u1ec7 cao h\u01a1n h\u1eb3n (\u0111\u1ea1t t\u1edbi 65%) v\u00e0 ch\u1ec9 s\u1ed1 ra r\u1ec5 cao h\u01a1n. Nh\u01b0 v\u1eady gi\u00e2m hom re h\u01b0\u01a1ng l\u00e0 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c nh\u00e2n gi\u1ed1ng hi\u1ec7u qu\u1ea3 \u0111\u1ed1i v\u1edbi c\u00e2y re h\u01b0\u01a1ng.<\/p>\n

 <\/p>\n

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

 <\/p>\n

Re h\u01b0\u01a1ng l\u00e0 c\u00e2y \u0111\u01b0\u1ee3c ghi v\u00e0o S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam n\u00ean c\u1ea7n mau ch\u00f3ng b\u1ea3o t\u1ed3n th\u00f4ng qua b\u1ea3o v\u1ec7 t\u1ea1i ch\u1ed7 ho\u1eb7c g\u00e2y tr\u1ed3ng r\u1eebng m\u1edbi, do v\u1eady b\u00ean c\u1ea1nh nh\u00e2n gi\u1ed1ng b\u1eb1ng h\u1ea1t th\u00ec nh\u00e2n gi\u1ed1ng hom l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p h\u1eefu hi\u1ec7u gi\u00fap c\u00f3 \u0111\u1ee7 ngu\u1ed3n gi\u1ed1ng c\u1ea7n thi\u1ebft cho vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c qu\u1ea7n th\u1ee5 b\u1ea3o t\u1ed3n.<\/p>\n

Re h\u01b0\u01a1ng kh\u00f3 t\u00ecm th\u1ea5y c\u00e2y m\u1eb9 tr\u01b0\u1edfng th\u00e0nh \u0111\u1ec3 thu h\u00e1i h\u1ea1t n\u00ean gi\u00e2m hom l\u00e0 c\u00f3 hi\u1ec7u qu\u1ea3 h\u01a1n c\u1ea3 trong vi\u1ec7c nh\u00e2n gi\u1ed1ng ph\u1ee5c v\u1ee5 tr\u1ed3ng r\u1eebng b\u1ea3o t\u1ed3n c\u0169ng nh\u01b0 tr\u1ed3ng r\u1eebng di\u1ec7n l\u1edbn h\u01a1n sau n\u00e0y khi c\u00f3 \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n c\u1ea7n thi\u1ebft.<\/p>\n

S\u1ed1 l\u01b0\u1ee3ng c\u00e2y m\u1eb9 c\u1ea7n thu h\u00e1i gi\u1ed1ng cho gi\u00e2m hom ph\u1ea3i l\u00e0 20 c\u00e2y tr\u1edf l\u00ean \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ea3n xu\u1ea5t m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e2y hom c\u00f3 n\u1ec1n t\u1ea3ng di truy\u1ec1n \u0111\u1ee7 l\u1edbn.<\/p>\n

 <\/p>\n

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

 <\/p>\n

B\u1ed9 Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 v\u00e0 M\u00f4i tr\u01b0\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, 484 pp.<\/p>\n

 <\/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, 530-531.<\/p>\n

 <\/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, 390-391.<\/p>\n

 <\/p>\n

Summary<\/span><\/h4>\n

Three stimulators namely IAA, IBA and NAA have been used to increase the rooting percentage as well as number of roots per cutting and root length, rooting index of Cinnamomum parthenoxylon<\/i> cuttings in dry and rainy season. It is noted that the species can be easily propagated by cutting with high rooting percentage (up to 65%) so that vegetative propagation technique (cutting propagation) can be used for mass production of planting material for conservation planting.<\/p>\n","protected":false},"excerpt":{"rendered":"

Re h\u01b0\u01a1ng c\u00f3 t\u00ean khoa h\u1ecdc l\u00e0 Cinnamomum parthenoxylon Meisn, thu\u1ed9c h\u1ecd Long n\u00e3o (Lauraceae), l\u00e0 lo\u00e0i c\u00e2y l\u1ea5y g\u1ed7 k\u1ebft h\u1ee3p l\u1ea5y tinh d\u1ea7u, c\u00f3 ph\u00e2n b\u1ed1 r\u1ea3i r\u00e1c ch\u1ee7 y\u1ebfu \u1edf c\u00e1c t\u1ec9nh mi\u1ec1n Trung v\u00e0 T\u00e2y Nguy\u00ean. M\u1eb7c d\u00f9 c\u00f3 ph\u00e2n b\u1ed1 kh\u00e1 r\u1ed9ng song kh\u00f4ng t\u1eadp trung, l\u1ea1i b\u1ecb khai th\u00e1c m\u1ea1nh k\u1ec3 c\u1ea3 ch\u1eb7t c\u00e2y, l\u00e1 v\u00e0 \u0111\u00e0o c\u1ea3 r\u1ec5 \u0111\u1ec3 cung c\u1ea5p tinh d\u1ea7u x\u00e1 x\u1ecb n\u00ean re h\u01b0\u01a1ng \u0111ang \u0111\u1ee9ng tr\u01b0\u1edbc nguy c\u01a1 b\u1ecb ti\u00eau di\u1ec7t v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c ghi v\u00e0o S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam (1996).<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/475"}],"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=475"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/475\/revisions"}],"predecessor-version":[{"id":11549,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/475\/revisions\/11549"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}