{"id":13668,"date":"2014-09-24T14:11:45","date_gmt":"2014-09-24T07:11:45","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=13668"},"modified":"2014-08-29T14:18:02","modified_gmt":"2014-08-29T07:18:02","slug":"bao-cao-ket-qua-de-tai-buoc-dau-chon-giong-cho-xoan-ta-melia-azedarach-va-tech-tectona-grandis-co-nang-suat-cao-nham-dap-ung-yeu-cau-trong-rung-go-lon","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-ket-qua-de-tai-buoc-dau-chon-giong-cho-xoan-ta-melia-azedarach-va-tech-tectona-grandis-co-nang-suat-cao-nham-dap-ung-yeu-cau-trong-rung-go-lon\/","title":{"rendered":"B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 \u0111\u1ec1 t\u00e0i: B\u01b0\u1edbc \u0111\u1ea7u ch\u1ecdn gi\u1ed1ng cho Xoan ta (Melia azedarach) v\u00e0 T\u1ebfch (Tectona grandis) c\u00f3 n\u0103ng su\u1ea5t cao nh\u1eb1m \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn"},"content":{"rendered":"

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

Trong ch\u01b0\u01a1ng tr\u00ecnh tr\u1ed3ng m\u1edbi 5 tri\u1ec7u h\u00e9c ta r\u1eebng, c\u00f3 3 tri\u1ec7u h\u00e9c ta r\u1eebng s\u1ea3n xu\u1ea5t bao g\u1ed3m 1 tri\u1ec7u h\u00e9c ta c\u00e2y c\u00f4ng nghi\u1ec7p d\u00e0i ng\u00e0y v\u00e0 2 tri\u1ec7u h\u00e9c ta c\u00e2y l\u00e2m nghi\u1ec7p. Trong \u0111\u00f3 c\u00f3 t\u1edbi 75% l\u00e0 c\u00e1c lo\u00e0i c\u00e2y keo, b\u1ea1ch \u0111\u00e0n, th\u00f4ng v\u00e0 tr\u00e0m, c\u00f2n m\u1ed9t s\u1ed1 lo\u00e0i nh\u1eadp n\u1ed9i c\u00f3 tri\u1ec3n v\u1ecdng, m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn v\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba ch\u1ec9 chi\u1ebfm t\u1ef7 l\u1ec7 nh\u1ecf v\u00e0 c\u0169ng ch\u01b0a \u0111\u01b0\u1ee3c ch\u00fa \u00fd ph\u00e1t tri\u1ec3n.<\/p>\n

Xoan ta <\/b>(Melia azedarach<\/i>) <\/b>thu\u1ed9c h\u1ecd Xoan (Meliaceae) <\/b>l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 nh\u1ee1 hay g\u1ed7 l\u1edbn, c\u00f3 chi\u1ec1u cao 15-20m. L\u00e0 lo\u00e0i c\u00e2y \u0111a t\u00e1c d\u1ee5ng: g\u1ed7 c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m \u0111\u1ed3 m\u1ed9c g\u1ed7 x\u00e2y d\u1ef1ng, l\u00e1 l\u00e0m ph\u00e2n xanh, h\u1ea1t c\u00f3 th\u1ec3 \u00e9p l\u1ea5y d\u1ea7u, v\u1ecf c\u00f3 th\u1ec3 l\u00e0m thu\u1ed1c\u2026L\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba ph\u00e2n b\u1ed1 r\u1ed9ng r\u00e3i \u1edf n\u01b0\u1edbc ta su\u1ed1t t\u1eeb B\u1eafc \u0111\u1ebfn Nam. \u0110\u00e2y l\u00e0 lo\u00e0i c\u00f3 g\u1ed7 nh\u1eb9 v\u00e0 m\u1ec1m, d\u00f9ng \u0111\u1ec3 x\u00e2y d\u1ef1ng, \u0111\u00f3ng \u0111\u1ed3 m\u1ed9c\u2026 c\u0169ng l\u00e0 lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u00e2n t\u00e1n r\u1ea5t ph\u1ed5 bi\u1ebfn, c\u00f3 t\u0103ng tr\u01b0\u1edfng kh\u00e1 nhanh v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf nh\u01b0ng cho \u0111\u1ebfn nay ch\u00fang ta h\u1ea7u nh\u01b0 ch\u01b0a c\u00f3 nghi\u00ean c\u1ee9u ch\u1ecdn\u00a0 v\u00e0 nh\u00e2n gi\u1ed1ng cho \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0y.<\/p>\n

T\u1ebfch (Tectona grandis)<\/i> thu\u1ed9c h\u1ecd C\u1ecf roi ng\u1ef1a (Verbenaceae), <\/i><\/b>ph\u00e2n b\u1ed1 trong c\u00e1c khu r\u1eebng nhi\u1ec7t \u0111\u1edbi \u1edf Mi\u1ebfn \u0110i\u1ec7n, nam v\u00e0 trung \u1ea4n \u0110\u1ed9, Th\u00e1i Lan, L\u00e0o v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng tr\u00ean m\u1ed9t s\u1ed1 n\u01b0\u1edbc nh\u01b0 Indonesia, Malaysia, Philippin, C\u0103mphuchia v\u00e0 m\u1ed9t s\u1ed1 n\u01b0\u1edbc Ch\u00e2u Phi, Ch\u00e2u M\u1ef9\u2026<\/p>\n

Do c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf r\u1ea5t cao n\u00ean T\u1ebfch tr\u1ed3ng v\u1edbi di\u1ec7n t\u00edch l\u1edbn. \u1ede Java (Indonesia) di\u1ec7n t\u00edch tr\u1ed3ng T\u1ebfch kho\u1ea3ng 1 tri\u1ec7u hecta chi\u1ebfm t\u1edbi 45% di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng. T\u00ednh \u0111\u1ebfn 2003 di\u1ec7n t\u00edch r\u1eebng T\u1ebfch \u1edf khu v\u1ef1c Ch\u00e2u \u00c1- Th\u00e1i B\u00ecnh D\u01b0\u01a1ng l\u00ean t\u1edbi 25 tri\u1ec7u hecta (C.T.S. Nair., <\/b>2003).<\/p>\n

Tr\u01b0\u1edbc nhu c\u1ea7u v\u1ec1 g\u1ed7 l\u1edbn, bao g\u1ed3m g\u1ed7 x\u00e2y d\u1ef1ng, g\u1ed7 nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c, h\u00e0ng xu\u1ea5t kh\u1ea9u ng\u00e0y c\u00e0ng t\u0103ng nhanh. T\u1eeb tr\u01b0\u1edbc \u0111\u1ebfn nay ngu\u1ed3n cung c\u1ea5p c\u00e1c lo\u1ea1i nguy\u00ean li\u1ec7u n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 t\u1eeb r\u1eebng t\u1ef1 nhi\u00ean ho\u1eb7c nh\u1eadp kh\u1ea9u, m\u1eb7t kh\u00e1c c\u00e1c nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng c\u00e2y r\u1eebng g\u1ea7n \u0111\u00e2y ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o m\u1ed9t s\u1ed1 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00e2y nh\u1eadp n\u1ed9i, m\u1ecdc nhanh ph\u1ee5c v\u1ee5 cho c\u00f4ng nghi\u1ec7p v\u00e0 v\u00e1n nh\u00e2n t\u1ea1o\u2026 c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 c\u00e2y g\u1ed7 l\u1edbn v\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba c\u00f2n thi\u1ebfu, m\u1eb7t kh\u00e1c nh\u00e2n gi\u1ed1ng b\u1eb1ng c\u00f4ng ngh\u1ec7 m\u00f4-hom ngo\u00e0i vi\u1ec7c \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng di truy\u1ec1n, c\u00f2n cung c\u1ea5p \u0111\u01b0\u1ee3c s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e2y gi\u1ed1ng c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng cho tr\u1ed3ng r\u1eebng. Do \u0111\u00f3 nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng, nh\u00e2n gi\u1ed1ng cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng T\u1ebfch v\u00e0 Xoan ta l\u00e0 vi\u1ec7c l\u00e0m c\u1ea7n thi\u1ebft.<\/p>\n

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

II. M\u1ee4C TI\u00caU NGHI\u00caN C\u1ee8U<\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ch\u1ecdn, nh\u00e2n v\u00e0 ph\u00e1t tri\u1ec3n gi\u1ed1ng Xoan ta v\u00e0 T\u1ebfch c\u00f3 n\u0103ng su\u1ea5t cao nh\u1eb1m \u0111\u00e1p \u1ee9ng nhu c\u1ea7u tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn<\/b><\/p>\n

III. V\u1eacT LI\u1ec6U, N\u1ed8I DUNG V\u00c0 PH\u01af\u01a0NG PH\u00c1P NGHI\u00caN C\u1ee8U<\/b><\/p>\n

III.1. V\u1eadt li\u1ec7u v\u00e0 \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u<\/i><\/b><\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0110\u1ed1i v\u1edbi Xoan ta<\/i>: c\u00e1c \u0111\u1ecba \u0111i\u1ec3m \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc \u0111\u1ec3 ch\u1ecdn c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n ph\u1ea3i c\u00f3 \u0111\u1ed9 tu\u1ed5i t\u1eeb 5 n\u0103m tr\u1edf n\u00ean v\u00e0 c\u00f3 di\u1ec7n t\u00edch tr\u1ed3ng t\u1ed1i thi\u1ec3u t\u1eeb 0,2ha ho\u1eb7c c\u00f3 s\u1ed1 l\u01b0\u1ee3ng c\u00e2y t\u1eeb 30 c\u00e2y tr\u1edf n\u00ean (T\u1ea1i m\u1ed9t s\u1ed1 t\u1ec9nh\u00a0: H\u00f2a B\u00ecnh, \u0110i\u1ec7n Bi\u00ean, S\u01a1n La, V\u0129nh Ph\u00fac Ph\u00fa Th\u1ecd, Y\u00ean B\u00e1i, Ngh\u1ec7 An, H\u00e0 T\u0129nh, Qu\u1ea3ng B\u00ecnh, Qu\u1ea3ng Tr\u1ecb, \u0110\u1ed3ng Nai, B\u00ecnh Ph\u01b0\u1edbc)<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0110\u1ed1i v\u1edbi T\u1ebfch<\/i>: \u0110\u1ecba \u0111i\u1ec3m ch\u1ecdn c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n cho T\u1ebfch: C\u00e1c l\u00e2m ph\u1ea7n r\u1eebng tr\u1ed3ng c\u00f3 \u0111\u1ed9 tu\u1ed5i t\u1eeb 20 n\u0103m tr\u1edf n\u00ean, c\u00f3 di\u1ec7n t\u00edch t\u1ed1i thi\u1ec3u 0,3ha ( Tuy\u00ean Quang, H\u00e0 Giang, Y\u00ean Ch\u00e2u (S\u01a1n La), \u0110\u1ed3ng Nai, V\u0169ng T\u00e0u, B\u00ecnh\u00a0 Ph\u01b0\u1edbc, T\u00e2y Nguy\u00ean, \u0110\u1eafc L\u1eafc)<\/p>\n

III.2. Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/i><\/b><\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i<\/i>: \u0110o \u0111\u1ebfm s\u1ed1 li\u1ec7u v\u1ec1 sinh tr\u01b0\u1edfng, v\u00e0 c\u00e1c ch\u1ec9 ti\u00eau v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 ch\u1ec9 ti\u00eau \u0111o \u0111\u1ebfm c\u1ee7a c\u00e1c c\u00e2y tr\u1ed9i ch\u1ecdn l\u1ecdc so v\u1edbi c\u00e1c c\u00e2y xung quanh theo L\u00ea \u0110\u00ecnh Kh\u1ea3 (2003)<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 nh\u00e2n gi\u1ed1ng:<\/i> <\/i>Nghi\u00ean c\u1ee9u\u00a0 nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom th\u1ef1c hi\u1ec7n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1edbi m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y r\u1eebng (L\u00ea \u0110\u00ecnh Kh\u1ea3, 2003), Nh\u00e2n gi\u1ed1ng b\u1eb1ng nu\u00f4i c\u1ea5y m\u00f4 theo ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n cho keo lai, b\u1ea1ch \u0111\u00e0n (\u0110o\u00e0n Th\u1ecb Mai, 2003).<\/b><\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u1ee9 l\u00fd s\u1ed1 li\u1ec7u:<\/i> <\/b>S\u1ed1 li\u1ec7u th\u00ed nghi\u1ec7m thu \u0111\u01b0\u1ee3c \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh x\u1eed l\u00fd tr\u00ean m\u00e1y t\u00ednh b\u1eb1ng ph\u1ea7n m\u1ec1m EXCEL.<\/p>\n

IV. K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U V\u1ec0 XOAN TA<\/b><\/p>\n

IV.1. Ch\u1ecdn \u0111\u1ecba \u0111i\u1ec3m ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i<\/i><\/b><\/p>\n

Qua kh\u1ea3o s\u00e1t m\u1ed9t s\u1ed1 t\u1ec9nh\/th\u00e0nh tr\u00ean m\u1ed9t s\u1ed1 v\u00f9ng sinh th\u00e1i ch\u00ednh, 79 c\u00e2y tr\u1ed9i Xoan ta \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc, s\u1ed1 li\u1ec7u v\u1ec1 \u0111\u1ed9 v\u01b0\u1ee3t c\u1ee7a c\u00e1c ch\u1ec9 ti\u00eau chi\u1ec1u cao(H), chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh (Hdc) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c (D1.3<\/sub>) \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p trong b\u1ea3ng sau:<\/p>\n

B\u1ea3ng 1<\/i><\/b>. T\u1ed5ng h\u1ee3p c\u00e1c khu v\u1ef1c \u0111i\u1ec1u tra v\u00e0 s\u1ed1 l\u01b0\u1ee3ng c\u00e2y tr\u1ed9i t\u1ea1i c\u00e1c \u0111i\u1ec3m nghi\u00ean c\u1ee9u<\/i><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

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

\n

T\u1ec9nh\/Th\u00e0nh<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 c\u00e2y tr\u1ed9i \u0111\u01b0\u1ee3c ch\u1ecdn<\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 v\u01b0\u1ee3t (\u03ed)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

Hvn<\/sub> <\/b><\/p>\n<\/td>\n

\n

Hdc<\/sub> <\/b><\/p>\n<\/td>\n

\n

D1.3<\/sub> <\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

H\u00e0 N\u1ed9i<\/td>\n\n

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

\n

1,59 – 1,88<\/p>\n<\/td>\n

\n

1,7 – 1,97<\/p>\n<\/td>\n

\n

1,74 – 1,85<\/p>\n<\/td>\n<\/tr>\n

\n

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

Ba V\u00ec (H\u00e0 T\u00e2y)<\/td>\n\n

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

\n

1,46 \u2013 2,75<\/p>\n<\/td>\n

\n

1,5 – 4,22<\/b><\/p>\n<\/td>\n

\n

1,55 – 4,08<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

H\u00f2a B\u00ecnh<\/td>\n\n

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

\n

1,54 \u2013 2,24<\/p>\n<\/td>\n

\n

1,47 – 2,57<\/p>\n<\/td>\n

\n

1,52 – 2,68<\/p>\n<\/td>\n<\/tr>\n

\n

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

Ngh\u1ec7 An<\/td>\n\n

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

\n

1,53 – 2,19<\/p>\n<\/td>\n

\n

1,59 – 2,21<\/p>\n<\/td>\n

\n

1,82 – 2,13<\/p>\n<\/td>\n<\/tr>\n

\n

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

Thanh H\u00f3a<\/td>\n\n

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

\n

1,57 – 1,94<\/p>\n<\/td>\n

\n

1,52 – 1,94<\/p>\n<\/td>\n

\n

1,55 – 2,48<\/p>\n<\/td>\n<\/tr>\n

\n

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

Qu\u1ea3ng Tr\u1ecb<\/td>\n\n

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

\n

1,63 – 2,62<\/p>\n<\/td>\n

\n

1,61 – 2,06<\/p>\n<\/td>\n

\n

1,78 – 2,24<\/p>\n<\/td>\n<\/tr>\n

\n

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

Ph\u00fa Th\u1ecd<\/td>\n\n

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

\n

1,53 – 1,98<\/p>\n<\/td>\n

\n

1,54 – 2,21<\/p>\n<\/td>\n

\n

1,56 – 2,27<\/p>\n<\/td>\n<\/tr>\n

\n

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

\u0110\u1ed3ng Nai<\/td>\n\n

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

\n

1,50 – 1,97<\/p>\n<\/td>\n

\n

1,52 – 1,98<\/p>\n<\/td>\n

\n

1,55 – 2,48<\/p>\n<\/td>\n<\/tr>\n

<\/td>\nT\u1ed5ng c\u1ed9ng<\/b><\/td>\n\n

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

\n

\u00a0<\/b><\/p>\n<\/td>\n

\n

\u00a0<\/b><\/p>\n<\/td>\n

\n

\u00a0<\/b><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eeb c\u00e1c \u0111\u1ecba \u0111i\u1ec3m ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i t\u1ea1i H\u00e0 N\u1ed9i, qua k\u1ebft qu\u1ea3 \u0111o \u0111\u1ebfm \u0111\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 4 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n. C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u01b0\u1ee3c ch\u1ecdn ch\u1ec9 c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,59 \u0111\u1ebfn 1,88 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. V\u1ec1 ch\u1ec9 ti\u00eau chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh c\u00e1c c\u00e2y tr\u1ed9i c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,79 \u0111\u1ebfn 1,97 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/p>\n

S\u1ed1 li\u1ec7u sinh tr\u01b0\u1edfng \u0111o \u0111\u01b0\u1ee3c t\u1ea1i Ba V\u00ec c\u0169ng cho th\u1ea5y, khu v\u1ef1c n\u00e0y t\u01b0\u01a1ng \u0111\u1ed1i th\u00edch h\u1ee3p \u0111\u1ec3 tr\u1ed3ng Xoan, sau 6 n\u0103m chi\u1ec1u cao v\u00fat ng\u1ecdn trung b\u00ecnh c\u1ee7a c\u00e1c c\u00e2y Xoan ta t\u1ea1i khu v\u1ef1c kh\u1ea3o s\u00e1t \u0111\u1ea1t kho\u1ea3ng 12,6m v\u1edbi \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c trung b\u00ecnh c\u0169ng \u0111\u1ea1t t\u1edbi 18,5 cm.<\/p>\n

C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n t\u1ea1i H\u00f2a B\u00ecnh \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t v\u1ec1 chi\u1ec1u cao \u0111\u1ea1t t\u1eeb 1,54 \u0111\u1ebfn 2,24 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/p>\n

\u1ede Ngh\u1ec7 An, qua k\u1ebft qu\u1ea3 \u0111o \u0111\u1ebfm \u0111\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 4 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n. C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u01b0\u1ee3c ch\u1ecdn ch\u1ec9 c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,59 \u0111\u1ebfn 1,88 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. V\u1ec1 ch\u1ec9 ti\u00eau chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh c\u00e1c c\u00e2y tr\u1ed9i c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,79 \u0111\u1ebfn 1,97 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/p>\n

T\u1ea1i c\u00e1c \u0111\u1ea1i \u0111i\u1ec3m ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i t\u1ea1i Thanh H\u00f3a, qua k\u1ebft qu\u1ea3 \u0111o \u0111\u1ebfm \u0111\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 8 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n. C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u01b0\u1ee3c ch\u1ecdn ch\u1ec9 c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,57 \u0111\u1ebfn 1,94 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/p>\n

Trong to\u00e0n b\u1ed9 \u0111i\u1ec3m \u0111\u01b0\u1ee3c ch\u1ecdn t\u1ea1i Qu\u1ea3ng Tr\u1ecb, qua k\u1ebft qu\u1ea3 \u0111o \u0111\u1ebfm \u0111\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 4 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n. C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u01b0\u1ee3c ch\u1ecdn ch\u1ec9 c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,57 \u0111\u1ebfn 1,63 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. V\u1ec1 ch\u1ec9 ti\u00eau chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh c\u00e1c c\u00e2y tr\u1ed9i c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,52 \u0111\u1ebfn 1,88 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/p>\n

Trong c\u00e1c \u0111i\u1ec3m ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i t\u1ea1i Ph\u00fa Th\u1ecd \u0111\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 8c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n. C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u01b0\u1ee3c ch\u1ecdn ch\u1ec9 c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,53 \u0111\u1ebfn 1,98 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. V\u1ec1 ch\u1ec9 ti\u00eau chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh c\u00e1c c\u00e2y tr\u1ed9i c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,54 \u0111\u1ebfn 2,21 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/p>\n

T\u1eeb c\u00e1c k\u1ebft qu\u1ea3 ch\u1ecdn gi\u1ed1ng cho Xoan \u1edf \u0110\u1ed3ng Nai \u0111\u1ec1 t\u00e0i \u0111\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 10 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n. C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u01b0\u1ee3c ch\u1ecdn ch\u1ec9 c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,50 \u0111\u1ebfn 1,97 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. V\u1ec1 ch\u1ec9 ti\u00eau chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh c\u00e1c c\u00e2y tr\u1ed9i c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t t\u1eeb 1,52 \u0111\u1ebfn 1,98 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/p>\n

IV.2. K\u1ebeT QU\u1ea2 D\u1eaaN D\u00d2NG V\u00c0 NH\u00c2N GI\u1ed0NG V\u00d4 T\u00cdNH CHO C\u00c1C C\u00c2Y TR\u1ed8I D\u1ef0 TUY\u1ec2N XOAN TA \u0110\u00c3 \u0110\u01af\u1ee2C CH\u1eccN L\u1eccC<\/b><\/p>\n

IV.2.1. D\u1eabn d\u00f2ng cho c\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u00e3 ch\u1ecdn l\u1ecdc<\/i><\/b><\/p>\n

K\u1ebft qu\u1ea3 d\u1eabn d\u00f2ng cho c\u00e1c d\u00f2ng c\u00e2y tr\u1ed9i Xoan ta cho th\u1ea5y, nh\u00e2n\u00a0 gi\u1ed1ng Xoan b\u1eb1ng r\u1ec5 l\u00e0 ph\u01b0\u01a1ng ph\u00e1p t\u01b0\u01a1ng \u0111\u1ed1i hi\u1ec7u qu\u1ea3.<\/p>\n

T\u1eeb th\u1ef1c t\u1ebf k\u1ebft qu\u1ea3 d\u1eabn d\u00f2ng cho c\u00e1c d\u00f2ng c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n Xoan \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc cho th\u1ea5y, kh\u1ea3 n\u0103ng d\u1eabn d\u00f2ng c\u1ee7a Xoan s\u1ebd gi\u1ea3m \u0111i khi tu\u1ed5i c\u1ee7a c\u00e2y tr\u1ed9i t\u0103ng l\u00ean.<\/p>\n

IV.2.2. Nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng Xoan ta b\u1eb1ng gi\u00e2m hom<\/i><\/b><\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m b\u01b0\u1edbc \u0111\u1ea7u cho th\u1ea5y, v\u1edbi Xoan ta lo\u1ea1i h\u00f3a ch\u1ea5t th\u00edch h\u1ee3p cho ra r\u1ec5 trong gi\u00e2m hom l\u00e0 IBA n\u1ed3ng \u0111\u1ed9 0,75% v\u1edbi t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t tr\u00ean 60%. Nh\u01b0 v\u1eady, t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 ra r\u1ec5 c\u1ee7a Xoan n\u1ebfu so v\u1edbi c\u00e1c lo\u1ea1i c\u00e2y r\u1eebng kh\u00e1c nh\u01b0 Keo lai, B\u1ea1ch \u0111\u00e0n cho d\u00f9 th\u1ea5p h\u01a1n nh\u01b0ng c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong nghi\u00ean c\u1ee9u.<\/p>\n

IV.2.3. \u00a0Nh\u00e2n gi\u1ed1ng Xoan ta b\u1eb1ng nu\u00f4i c\u1ea5y m\u00f4.<\/i><\/b><\/p>\n

T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1edbi c\u00e1c lo\u00e0i c\u00e2y r\u1eebng kh\u00e1c, thu\u1ef7 ng\u00e2n clorua 0,1% c\u00f3 t\u00e1c d\u1ee5ng t\u1ed1t h\u01a1n c\u00e1c lo\u1ea1i h\u00f3a ch\u1ea5t kh\u1eed tr\u00f9ng kh\u00e1c khi kh\u1eed tr\u00f9ng m\u1eabu v\u1eadt cho Xoan ta. Khi s\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t n\u00e0y cho th\u00ed nghi\u1ec7m kh\u1eed tr\u00f9ng, v\u1edbi th\u1eddi gian kh\u1eed tr\u00f9ng 15 ph\u00fat t\u1ef7 l\u1ec7 b\u1eadt ch\u1ed3i \u0111\u1ea1t 13,33% \u0111\u1ebfn 17,78% v\u00e0 t\u1ef7 l\u1ec7 nhi\u1ec5m t\u1eeb 37,78% – 46,67%.<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m kh\u1eed tr\u00f9ng theo m\u00f9a v\u1ee5 cho th\u1ea5y: m\u1eabu v\u1eadt l\u1ea5y v\u00e0o th\u1eddi gian th\u00e1ng 4 \u0111\u1ebfn th\u00e1ng 9\u00a0 cho t\u1ef7 l\u1ec7 n\u1ea3y ch\u1ed3i cao v\u00e0 th\u00edch h\u1ee3p\u00a0 cho vi\u1ec7c v\u00e0o m\u1eabu Xoan.<\/p>\n

M\u00f4i tr\u01b0\u1eddng nu\u00f4i c\u1ea5y MS* c\u00f3 t\u00e1c d\u1ee5ng r\u00f5 r\u1ec7t l\u00e0m t\u0103ng h\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i, chi\u1ec1u d\u00e0i ch\u1ed3i c\u0169ng nh\u01b0 s\u1ed1 l\u00e1 tr\u00ean ch\u1ed3i c\u1ee7a Xoan.<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m v\u1edbi c\u00e1c d\u00f2ng c\u00e2y tr\u1ed9i Xoan cho th\u1ea5y m\u00f4i tr\u01b0\u1eddng nh\u00e2n ch\u1ed3i th\u00edch h\u1ee3p cho c\u00e1c d\u00f2ng Xoan ta nghi\u00ean c\u1ee9u l\u00e0 m\u00f4i tr\u01b0\u1eddng MS* c\u00f3 b\u1ed5 sung 0,5 \u2013 1,0 mg\/l BAP v\u00e0 0,1 mg\/l NAA. Khi s\u1eed d\u1ee5ng m\u00f4i tr\u01b0\u1eddng n\u00e0y \u0111\u1ec3 k\u00edch th\u00edch t\u1ea1o ch\u1ed3i, h\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i \u0111\u1ea1t t\u1eeb 5,9\u00a0 \u0111\u1ebfn 6,4 ch\u1ed3i\/c\u1ee5m ch\u1ed3i. C\u00e1c ch\u1ed3i t\u1ea1o \u0111\u01b0\u1ee3c c\u00f3 chi\u1ec1u cao trung b\u00ecnh t\u1eeb 2,7 \u0111\u1ebfn 3,5 cm sau 20-25 ng\u00e0y nu\u00f4i c\u1ea5y.<\/p>\n

Nghi\u00ean c\u1ee9u ra r\u1ec5 c\u1ee7a Xoan \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf giai \u0111o\u1ea1n khi c\u00e1c ch\u1ed3i c\u00f3 chi\u1ec1u cao\u00a0 2,5 – 3 cm \u0111\u01b0\u1ee3c t\u00e1ch ra c\u1ea5y v\u00e0o m\u00f4i tr\u01b0\u1eddng MS* c\u00f3 b\u1ed5 sung m\u1ed9t s\u1ed1 ch\u1ea5t Auxin \u0111\u1ec3 t\u1ea1o r\u1ec5.<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y v\u1edbi c\u00f4ng th\u1ee9c m\u00f4i tr\u01b0\u1eddng MS* + IBA 0,5 ml\/l cho t\u1ef7 l\u1ec7 ra r\u1ec5 c\u00e1c d\u00f2ng Xoan nghi\u00ean c\u1ee9u l\u00e0 cao nh\u1ea5t, \u0111\u1ea1t trung b\u00ecnh 87,26%, v\u1edbi s\u1ed1 r\u1ec5 trung b\u00ecnh 4,56 r\u1ec5\/ch\u1ed3i th\u00ed nghi\u1ec7m.<\/p>\n

IV.3.4. Nh\u00e2n gi\u1ed1ng Xoan ta b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p<\/i><\/b>\u00a0\u00a0 <\/i><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cho t\u1ef7 l\u1ec7 s\u1ed1ng t\u01b0\u01a1ng \u0111\u1ed1i cao \u0111\u1ea1t trung b\u00ecnh 83% (th\u1ea5p nh\u1ea5t 6,67%, cao nh\u1ea5t 100%). C\u00e1c c\u00e2y t\u1ea1o \u0111\u01b0\u1ee3c c\u00f3 sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t.<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y:<\/p>\n

– T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y gh\u00e9p c\u00f3 ch\u1ed3i l\u1ea5y t\u1eeb c\u00e2y hom cao nh\u1ea5t \u0111\u1ea1t 95,0%\u00a0 h\u01a1n h\u1eb3n so v\u1edbi c\u00e2y gh\u00e9p ch\u1ed3i l\u1ea5y t\u1eeb m\u00f4.<\/p>\n

– Tu\u1ed5i g\u1ed1c gh\u00e9p th\u00edch h\u1ee3p l\u00e0 30 \u2013 40 ng\u00e0y tu\u1ed5i, t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t tr\u00ean 80%<\/p>\n

– Chi\u1ec1u d\u00e0i g\u1ed1c gh\u00e9p 10cm \u1edf 30 ng\u00e0y tu\u1ed5i c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng c\u00e2y gh\u00e9p cao nh\u1ea5t \u0111\u1ea1t 95,5%<\/p>\n

– Tu\u1ed5i ch\u1ed3i gh\u00e9p t\u1ed1t nh\u1ea5t l\u00e0 3 tu\u1ea7n tu\u1ed5i \u0111\u1ea1t tr\u00ean 77,3%<\/p>\n

– Chi\u1ec1u d\u00e0i ch\u1ed3i gh\u00e9p \u1edf 10cm cho t\u1ef7 l\u1ec7 s\u1ed1ng cao nh\u1ea5t 96,6%<\/p>\n

V. C\u00c1C K\u1ebeT QU\u1ea2\u00a0 NGHI\u00caN C\u1ee8U V\u1ec0 T\u1ebeCH<\/b><\/p>\n

V.1. Ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i<\/b><\/p>\n

Qua \u0111i\u1ec1u tra kh\u1ea3o s\u00e1t \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 60 c\u00e2y tr\u1ed9i t\u1ea1i 5 khu v\u1ef1c kh\u00e1c nhau l\u00e0 Thanh S\u01a1n, \u0110\u1ecbnh Qu\u00e1n, Xuy\u00ean M\u1ed9c, M\u00e3 \u0110\u00e0, B\u00ecnh Ph\u01b0\u1edbc.<\/p>\n

B\u1ea3ng 2.<\/i><\/b> T\u1ed5ng h\u1ee3p k\u1ebft qu\u1ea3 ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i T\u1ebfch<\/i><\/p>\n\n\n\n\n\n\n\n\n\n\n
\n

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

\n

T\u1ec9nh\/Th\u00e0nh<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 c\u00e2y tr\u1ed9i \u0111\u01b0\u1ee3c ch\u1ecdn<\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 v\u01b0\u1ee3t (\u03ed)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

\n

Hdc<\/sub><\/b><\/p>\n<\/td>\n

\n

D1.3<\/sub><\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

Thanh S\u01a1n<\/td>\n\n

14<\/p>\n<\/td>\n

\n

1,46 – 2,76<\/p>\n<\/td>\n

\n

1,44 – 2,52<\/p>\n<\/td>\n

\n

1,95 – 5,35<\/p>\n<\/td>\n<\/tr>\n

\n

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

\u0110\u1ecbnh Qu\u00e1n<\/td>\n\n

14<\/p>\n<\/td>\n

\n

0,63 \u2013 4,39<\/p>\n<\/td>\n

\n

0,30 – 1,53<\/p>\n<\/td>\n

\n

1,50 – 1,95<\/p>\n<\/td>\n<\/tr>\n

\n

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

Xuy\u00ean M\u1ed9c<\/td>\n\n

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

\n

1,61 – 2,86<\/p>\n<\/td>\n

\n

1,33 – 2,14<\/p>\n<\/td>\n

\n

1,02 – 3,61<\/p>\n<\/td>\n<\/tr>\n

\n

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

M\u00e3 \u0110\u00e0<\/td>\n\n

13<\/p>\n<\/td>\n

\n

1,54 – 2,44<\/p>\n<\/td>\n

\n

1,58 – 2,86<\/p>\n<\/td>\n

\n

1,66 – 2,68<\/p>\n<\/td>\n<\/tr>\n

\n

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

B\u00ecnh Ph\u01b0\u1edbc<\/td>\n\n

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

\n

0,59 – 1,96<\/p>\n<\/td>\n

\n

1,15 – 2,54<\/p>\n<\/td>\n

\n

0,69 – 1,98<\/p>\n<\/td>\n<\/tr>\n

<\/td>\nT\u1ed5ng c\u1ed9ng<\/b><\/td>\n\n

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

\n

\u00a0<\/b><\/p>\n<\/td>\n

\n

\u00a0<\/b><\/p>\n<\/td>\n

\n

\u00a0<\/b><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1ea1i \u0110\u1ecbnh Qu\u00e1n, qua qu\u00e1 tr\u00ecnh ch\u1ecdn l\u1ecdc v\u00e0 so s\u00e1nh d\u1ef1a v\u00e0o c\u00e1c ch\u1ec9 ti\u00eau ch\u1ecdn gi\u1ed1ng, 14 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc, c\u00e1c c\u00e2y n\u00e0y c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh theo \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 1,5 – 1,95Sx.<\/p>\n

T\u1ea1i Xuy\u00ean M\u1ed9c, \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 10 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n, c\u00e1c c\u00e2y n\u00e0y c\u00f3 ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec1u \u0111\u1ea1t y\u00eau c\u1ea7u ch\u1ecdn gi\u1ed1ng cho kinh doanh g\u1ed7 l\u1edbn v\u1edbi s\u1ed1 \u0111i\u1ec3m t\u1eeb 51 \u2013 58, v\u00e0 cao h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c c\u00e2y so s\u00e1nh c\u00f9ng l\u00e2m ph\u1ea7n<\/p>\n

C\u0169ng t\u1ea1i \u0110\u1ed3ng Nai, 13 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc t\u1ea1i M\u00e3 \u0110\u00e0, c\u00e1c c\u00e2y n\u00e0y c\u00f3 h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c t\u00ednh theo \u0111\u1ed9 l\u1ec7ch chu\u1ea9n (Sx)\u00a0 n\u1eb1m trong kho\u1ea3ng t\u1eeb 1,66 \u0111\u1ebfn 2,68 Sx. Ch\u1ec9 ti\u00eau ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a 9 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n, cao h\u01a1n c\u00e1c c\u00e2y so s\u00e1nh v\u1edbi \u0111\u1ed9 v\u01b0\u1ee3t dao \u0111\u1ed9ng t\u1eeb 15,96 – 26,3%, Nh\u01b0 v\u1eady, qua k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch \u1edf tr\u00ean c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y c\u1ea3 9 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n n\u00e0y \u0111\u1ec1u \u0111\u1ea1t y\u00eau c\u1ea7u \u0111\u1eb7t ra cho ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i.<\/p>\n

Qua kh\u1ea3o s\u00e1t \u0111i\u1ec1u tra, \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 14 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n t\u1ea1i r\u1eebng t\u1ebfch Thanh S\u01a1n, m\u1eb7c d\u00f9 \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a l\u1ea7m ph\u1ea7n l\u00e0 kh\u00e1 cao, xong c\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u1edf \u0111\u00e2y c\u00f3 \u0111\u1ed9 v\u01b0\u1ee3t v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ec1u t\u01b0\u01a1ng \u0111\u1ed1i cao.<\/p>\n

V.2.<\/b> D\u1eaaN D\u00d2NG CHO C\u00c1C C\u00c2Y TR\u1ed8I\u00a0 \u0110\u00c3 CH\u1eccN<\/b><\/p>\n

K\u1ebft qu\u1ea3 d\u1eabn d\u00f2ng cho th\u1ea5y, ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p cho t\u1ef7 l\u1ec7 s\u1ed1ng t\u01b0\u01a1ng \u0111\u1ed1i cao \u0111\u1ea1t trung b\u00ecnh 56% (th\u1ea5p nh\u1ea5t 20%, cao nh\u1ea5t 91%). C\u00e1c c\u00e2y t\u1ea1o \u0111\u01b0\u1ee3c c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t.<\/p>\n

V.3. NH\u00c2N GI\u1ed0NG SINH D\u01af\u1ee0NG T\u1ebeCH B\u1eb0NG NU\u00d4I C\u1ea4Y M\u00d4<\/b><\/p>\n

K\u1ebft qu\u1ea3 cho th\u1ea5y, \u0111\u1ed1i v\u1edbi T\u1ebfch th\u00ec c\u00f4ng th\u1ee9c kh\u1eed tr\u00f9ng t\u1ed1t nh\u1ea5t l\u00e0 HgCl2<\/sub> 0,05% trong kho\u1ea3ng th\u1eddi gian 10 ph\u00fat, m\u1eb7c d\u00f9 t\u1ef7 l\u1ec7 nhi\u1ec5m l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i cao 74,8% nh\u01b0ng t\u1ef7 l\u1ec7 m\u1eabu b\u1eadt ch\u1ed3i l\u1ea1i cao (18,51%)\u00a0 so v\u1edbi c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m c\u00f2n l\u1ea1i.<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m kh\u1eed tr\u00f9ng theo m\u00f9a v\u1ee5 c\u0169ng cho th\u1ea5y: th\u1eddi \u0111i\u1ec3m l\u1ea5y m\u1eabu th\u00edch h\u1ee3p c\u1ee7a T\u1ebfch l\u00e0 v\u00e0o m\u00f9a h\u00e8 t\u1eeb th\u00e1ng 5 \u0111\u1ebfn th\u00e1ng 7.<\/p>\n

H\u1ec7 s\u1ed1 nh\u00e2n c\u1ee7a T\u1ebfch trong m\u00f4i tr\u01b0\u1eddng WPM \u0111\u1ea1t cao nh\u1ea5t l\u00e0 2,27 l\u1ea7n, sau \u0111\u00f3 l\u00e0 \u1edf m\u00f4i tr\u01b0\u1eddng MS h\u1ec7 s\u1ed1 nh\u00e2n l\u00e0 1,93 v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 m\u00f4i tr\u01b0\u1eddng B5 v\u1edbi h\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i l\u00e0 1,53.<\/p>\n

K\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng nh\u00e2n ch\u1ed3i T\u1ebfch cho th\u1ea5y: trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m th\u00ec c\u00f4ng th\u1ee9c m\u00f4i tr\u01b0\u1eddng c\u00f3 b\u1ed5 sung BAP 0,5mg\/l v\u00e0 NAA 0,1mg\/l cho h\u1ec7 s\u1ed1 nh\u00e2n \u0111\u1ea1t 1,99 l\u1ea7n, chi\u1ec1u cao ch\u1ed3i l\u00e0 2,38cm v\u00e0 s\u1ed1 l\u00e1 b\u00ecnh qu\u00e2n tr\u00ean ch\u1ed3i l\u00e0 7,57 l\u00e1 c\u00e1c ch\u1ed3i sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n h\u1eb3n so v\u1edbi c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m c\u00f2n l\u1ea1i.<\/p>\n

Qua c\u00e1c th\u00ed nghi\u1ec7m nh\u00e2n gi\u1ed1ng \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m t\u1ed1t nh\u1ea5t v\u1eeba cho t\u1ef7 l\u1ec7 ra r\u1ec5 cao, s\u1ed1 r\u1ec5 trung b\u00ecnh tr\u00ean ch\u1ed3i nhi\u1ec1u, chi\u1ec1u d\u00e0i trung b\u00ecnh c\u1ee7a r\u1ec5 c\u0169ng cao \u0111\u00f3 ch\u00ednh l\u00e0 c\u00f4ng th\u1ee9c MS* + 1,5 mg\/l IBA. V\u1edbi c\u00f4ng th\u1ee9c n\u00e0y t\u1ef7 l\u1ec7 ra r\u1ec5 l\u00e0 91,73%, s\u1ed1 r\u1ec5 trung b\u00ecnh tr\u00ean ch\u1ed3i l\u00e0 2,22 r\u1ec5\/c\u00e2y, chi\u1ec1u d\u00e0i trung b\u00ecnh c\u1ee7a r\u1ec5 l\u00e0 1,58cm\/r\u1ec5 v\u00e0 chi\u1ec1u d\u00e0i ch\u1ed3i l\u00e0 2,5cm.<\/p>\n

\u0110\u1ec3 r\u00fat ng\u1eafn th\u1eddi gian trong quy tr\u00ecnh nh\u00e2n gi\u1ed1ng cho T\u1ebfch, th\u00ed nghi\u1ec7m gi\u00e2m hom cho c\u00e1c ch\u1ed3i t\u1eeb nu\u00f4i c\u1ea5y Invitro trong \u0111i\u1ec1u ki\u1ec7n v\u01b0\u1eddn \u01b0\u01a1m \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh. Trong th\u00ed nghi\u1ec7m n\u00e0y, c\u00e1c ch\u1ed3i thu \u0111\u01b0\u1ee3c sau qu\u00e1 tr\u00ecnh nh\u00e2n ch\u1ed3i, \u0111\u01b0\u1ee3c t\u00e1ch ra, ch\u1ea5m g\u1ed1c b\u1eb1ng thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 th\u01b0\u01a1ng ph\u1ea9m d\u1ea1ng b\u1ed9t (TTG) r\u1ed3i \u0111\u01b0\u1ee3c ch\u0103m s\u00f3c nh\u01b0 v\u1edbi ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom th\u00f4ng th\u01b0\u1eddng. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y, thu\u1ed1c k\u00edch th\u00edch ra r\u1ec5 d\u1ea1ng b\u1ed9t, c\u00f3 g\u1ed1c l\u00e0 IBA v\u1edbi n\u1ed3ng \u0111\u1ed9 1% l\u00e0 th\u00edch h\u1ee3p nh\u1ea5t cho qu\u00e1 tr\u00ecnh ra r\u1ec5 tr\u1ef1c ti\u1ebfp cho c\u00e1c d\u00f2ng T\u1ebfch nghi\u00ean c\u1ee9u, v\u1edbi t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t tr\u00ean 85%. \u00c1p d\u1ee5ng th\u00e0nh c\u00f4ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, th\u1eddi gian nh\u00e2n gi\u1ed1ng cho T\u1ebfch r\u00fa ng\u1eafn \u0111\u01b0\u1ee3c 10-15 ng\u00e0y so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p th\u00f4ng th\u01b0\u1eddng, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c c\u00e1c chi ph\u00ed \u0111\u1ea7u v\u00e0o: h\u00f3a ch\u1ea5t, nh\u00e2n c\u00f4ng,.. v\u00e0 h\u1ea1 gi\u00e1 th\u00e0nh s\u1ea3n ph\u1ea9m<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m v\u1ec1 m\u1ee5a v\u1ee5 cho ra r\u1ec5 ch\u1ed3i Invitro<\/i> tr\u1ef1c ti\u1ebfp trong \u0111i\u1ec1u ki\u1ec7n v\u01b0\u1eddn \u01b0\u01a1m cho th\u1ea5y: v\u1ec1 m\u00f9a Xu\u00e2n v\u00e0 m\u00f9a thu th\u00ec t\u1ef7 l\u1ec7 ch\u1ed3i s\u1ed1ng cao v\u00e0 t\u1ef7 l\u1ec7 ra r\u1ec5 c\u0169ng cao. C\u00f2n m\u00f9a h\u00e8 th\u00ec t\u1ef7 l\u1ec7 s\u1ed1ng th\u1ea5p, nh\u00ecn v\u00e0o bi\u1ec3u \u0111\u1ed3 c\u00f3 th\u1ec3 th\u1ea5y v\u1ec1 m\u00f9a h\u00e8 th\u00ec t\u1ef7 l\u1ec7 ch\u1ed3i s\u1ed1ng v\u00e0 t\u1ef7 l\u1ec7 ch\u1ed3i ra r\u1ec5 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng hay nh\u1eefng ch\u1ed3i s\u1ed1ng \u0111\u01b0\u1ee3c \u0111\u1ec1u ra r\u1ec5. C\u00f2n v\u1ec1 m\u00f9a \u0110\u00f4ng th\u00ec t\u1ef7 l\u1ec7 s\u1ed1ng c\u0169ng nh\u01b0 t\u1ef7 l\u1ec7 ra r\u1ec5 l\u00e0 th\u1ea5p nh\u1ea5t, c\u00e1c ch\u1ec9 ti\u00eau v\u1ec1 s\u1ed1 r\u1ec5 trung b\u00ecnh v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 trung b\u00ecnh c\u0169ng th\u1ea5p nh\u1ea5t.<\/p>\n

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

C\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 Xoan ta<\/h3>\n

– \u0110\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 79 c\u00e2y tr\u1ed9i t\u1ea1i m\u1ed9t s\u1ed1 v\u00f9ng sinh th\u00e1i ch\u00ednh trong c\u1ea3 n\u01b0\u1edbc c\u00e1c c\u00e2y tr\u1ed9i \u0111\u1ec1u \u0111\u1ea1t \u0111\u1ed9 v\u01b0\u1ee3t v\u1ec1 sinh tr\u01b0\u1edfng c\u0169ng nh\u01b0 ch\u1ea5t l\u01b0\u1ee3ng th\u00e2n c\u00e2y.<\/p>\n

– D\u1eabn gi\u1ed1ng th\u00e0nh c\u00f4ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom r\u1ec5, \u0111\u00e2y c\u0169ng l\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u m\u1ed9t c\u00e1ch c\u00f3 h\u1ec7 th\u1ed1ng v\u00e0 \u00e1p d\u1ee5ng v\u00e0o th\u1ef1c ti\u1ec5n. K\u1ebft qu\u1ea3 \u0111\u00e3 d\u1eabn gi\u1ed1ng \u0111\u01b0\u1ee3c cho 60\/79 c\u00e2y tr\u1ed9i \u0111\u00e3 ch\u1ecdn l\u1ecdc.<\/p>\n

– \u0110\u1ec1 t\u00e0i \u0111\u00e3 nghi\u00ean c\u1ee9u th\u00e0nh c\u00f4ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p n\u00eam cho Xoan ta v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh tr\u00ean 80%. \u0110\u00e2y c\u0169ng l\u00e0 ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng hi\u1ec7u qu\u1ea3 nh\u1ea5t cho c\u00e1c d\u00f2ng c\u00e2y tr\u1ed9i Xoan ta.<\/p>\n

-Xoan ta c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nh\u00e2n gi\u1ed1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom b\u1eb1ng thu\u1ed1c gi\u00e2m hom d\u1ea1ng b\u1ed9t v\u1edbi n\u1ed3ng \u0111\u1ed9 IBA l\u00e0 0,75%.<\/p>\n

-K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m nu\u00f4i c\u1ea5y m\u00f4 cho th\u1ea5y, ph\u01b0\u01a1ng ph\u00e1p kh\u1eed tr\u00f9ng th\u00edch h\u1ee3p cho Xoan ta l\u00e0 dung d\u1ecbch HgCl2 0,1% trong v\u00f2ng 10-15 ph\u00fat. M\u00f4i tr\u01b0\u1eddng nh\u00e2n ch\u1ed3i th\u00edch h\u1ee3p cho Xoan ta l\u00e0 MS* (m\u00f4i tr\u01b0\u1eddng MS c\u1ea3i ti\u1ebfn) c\u00f3 b\u1ed5 sung BAP n\u1ed3ng \u0111\u1ed9 0,75g\/l. Th\u1eddi gian cho 01 v\u00f2ng c\u1ea5y chuy\u1ec3n l\u00e0 20 ng\u00e0y v\u1edbi s\u1ed1 ch\u1ed3i\/c\u1ee5m \u0111\u1ea1t 6,47. M\u00f4i tr\u01b0\u1eddng ra r\u1ec5 th\u00edch h\u1ee3p cho Xoan ta l\u00e0 1\/2MS* b\u1ed5 sung IBA n\u1ed3ng \u0111\u1ed9 0,75 v\u1edbi 76,04% s\u1ed1 ch\u1ed3i ra r\u1ec5.<\/p>\n

– Kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf v\u00e0 d\u00f2ng v\u00f4 t\u00ednh cho th\u1ea5y, Xoan ta c\u00f3 th\u1ec3 th\u00edch \u1ee9ng v\u1edbi nhi\u1ec1u d\u1ea1ng l\u1eadp \u0111\u1ecba kh\u00e1c nhau (Ba V\u00ec, \u0110\u00f4ng H\u00e0 v\u00e0 \u0110\u1ed3ng Nai) v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng tr\u00ean 85% \u0111\u1ebfn n\u0103m th\u1ee9 3 c\u1ee7a kh\u1ea3o nghi\u1ec7m. M\u1ed9t s\u1ed1 c\u00e2y c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c 7m chi\u1ec1u cao v\u00e0 10cm v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c. Qua kh\u1ea3o nghi\u1ec7m, \u0111\u1ec1 t\u00e0i c\u0169ng \u0111\u00e3 ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 5-7 d\u00f2ng v\u00f4 t\u00ednh c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi gi\u1ed1ng c\u00e2y h\u1ea1t \u0111\u1ea1i tr\u00e0 trong \u0111\u00f3 c\u00f3 c\u00e1c d\u00f2ng BV9, BV4, TN8 v\u00e0 \u0110P5 c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t tr\u00ean c\u1ea3 2 kh\u1ea3o nghi\u1ec7m \u1edf Ba V\u00ec (H\u00e0 N\u1ed9i) v\u00e0 \u0110\u00f4ng H\u00e0 (Qu\u1ea3ng Tr\u1ecb). Tuy nhi\u00ean, do ch\u01b0a \u0111\u1ebfn giai \u0111o\u1ea1n th\u00e0nh th\u1ee5c v\u1ec1 m\u1eb7t sinh tr\u01b0\u1edfng, c\u00e1c kh\u1ea3o nghi\u1ec7m n\u00e0y c\u1ea7n \u0111\u01b0\u1ee3c theo d\u00f5i th\u00eam.<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 T\u1ebfch<\/h3>\n

– \u0110\u1ec1 t\u00e0i \u0111\u00e3 ti\u1ebfn h\u00e0nh ch\u1ecdn l\u1ecdc \u0111\u01b0\u1ee3c 50 c\u00e2y tr\u1ed9i t\u1eeb c\u00e1c qu\u1ea7n th\u1ec3 T\u1ebfch trong n\u01b0\u1edbc v\u00e0 ti\u1ebfn h\u00e0nh d\u1eabn d\u00f2ng th\u00e0nh c\u00f4ng cho 36 d\u00f2ng c\u00e2y tr\u1ed9i.<\/p>\n

– \u0110\u00e3 nh\u1eadp 45 l\u00f4 h\u1ea1t c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1eeb c\u00e1c v\u01b0\u1eddn gi\u1ed1ng c\u1ee7a Th\u00e1i Lan \u0111\u1ec3 x\u00e2y d\u1ef1ng kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf v\u00e0 v\u01b0\u1eddn t\u1eadp h\u1ee3p t\u1eadp \u0111o\u00e0n gi\u1ed1ng.<\/p>\n

– \u0110\u1ec1 t\u00e0i \u0111\u00e3 ti\u1ebfn h\u00e0nh nh\u00e2n gi\u1ed1ng th\u00e0nh c\u00f4ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p hom cho 36 d\u00f2ng c\u00e2y tr\u1ed9i v\u00e0 nu\u00f4i c\u1ea5y m\u00f4 cho 24 d\u00f2ng c\u00e2y tr\u1ed9i.<\/p>\n

-K\u1ebft qu\u1ea3 gi\u00e2m hom cho th\u1ea5y, hom T\u1ebfch ra r\u1ec5 t\u1ed1t nh\u1ea5t v\u1edbi IBA n\u1ed3ng \u0111\u1ed9 1,0% v\u00e0 gi\u00e1 th\u1ec3 gi\u00e2m hom ph\u00f9 h\u1ee3p nh\u1ea5t h\u1ed7n h\u1ee3p 70 \u0111\u1ea5t m\u1ea7u + 30 h\u1ed7n h\u1ee3p ru\u1ed9t b\u1ea7u.<\/p>\n

-V\u1edbi ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4, kh\u1eed tr\u00f9ng b\u1eb1ng HgCl2 0,05% trong th\u1eddi gian 10 ph\u00fat l\u00e0 t\u1ed1t nh\u1ea5t. M\u00f4i tr\u01b0\u1eddng nh\u00e2n t\u1ea1o ch\u1ed3i th\u00edch h\u1ee3p l\u00e0 MS* + BAP n\u1ed3ng \u0111\u1ed9 0,5 mg\/l + NAA n\u1ed3ng \u0111\u1ed9 1,0 mg\/l. M\u00f4i tr\u01b0\u1eddng ra r\u1ec5 th\u00edch h\u1ee3p l\u00e0 1\/2MS* + IBA n\u1ed3ng \u0111\u1ed9 1,5 mg\/l.<\/p>\n

-T\u1eeb nghi\u00ean c\u1ee9u v\u1ec1 nu\u00f4i c\u1ea5y m\u00f4 cho T\u1ebfch \u0111\u1ec1 t\u00e0i \u0111\u00e3 ho\u00e0n thi\u1ec7n \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng ph\u00e1p ra r\u1ec5 ch\u1ed3i non Invitro<\/i> b\u1eb1ng ch\u1ea5m thu\u1ed1c b\u1ed9t TTG c\u00f3 g\u1ed1c l\u00e0 IBA n\u1ed3ng \u0111\u1ed9 1,0% v\u1edbi t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t tr\u00ean 90%, t\u1ed5ng th\u1eddi gian cho qu\u00e1 tr\u00ecnh ra r\u1ec5 v\u00e0 hu\u1ea5n luy\u1ec7n \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn 15%. C\u00e2y con t\u1ea1o ra c\u00f3 \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u cao, kh\u1ecfe m\u1ea1nh.<\/p>\n

– Qua kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf, \u0111\u1ec1 t\u00e0i b\u01b0\u1edbc \u0111\u1ea7u \u0111\u00e3 \u0111\u00e1nh gi\u00e1 v\u00e0 ch\u1ecdn \u0111\u01b0\u1ee3c 5-7 gia \u0111\u00ecnh c\u00f3 sinh tr\u01b0\u1edfng v\u01b0\u1ee3t tr\u1ed9i, c\u00e1c gia \u0111\u00ecnh EA3, \u0110Q29 v\u00e0 \u0110Q31 l\u00e0 c\u00e1c gia \u0111\u00ecnh c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t tr\u00ean c\u1ea3 2 kh\u1ea3o nghi\u1ec7m t\u1ea1i Ngh\u0129a Trung v\u00e0 Ba V\u00ec. Ngu\u1ed3n gi\u1ed1ng thu \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c l\u00e2m ph\u1ea7n trong n\u01b0\u1edbc c\u00f3 sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1c l\u00f4 h\u1ea1t c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng di truy\u1ec1n \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n t\u1eeb Th\u00e1i Lan. Tuy nhi\u00ean, do c\u00e1c kh\u1ea3o nghi\u1ec7m m\u1edbi \u0111\u01b0\u1ee3c 3 tu\u1ed5i n\u00ean c\u1ea7n c\u00f3 th\u00eam th\u1eddi gian theo d\u00f5i v\u00e0 ch\u1ecdn l\u1ecdc ti\u1ebfp.<\/p>\n

\u0110\u1ec1 ngh\u1ecb<\/h2>\n

– K\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m d\u00f2ng v\u00f4 t\u00ednh Xoan ta cho th\u1ea5y, h\u01b0\u1edbng \u0111i tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t Xoan ta b\u1eb1ng d\u00f2ng v\u00f4 t\u00ednh l\u00e0 kh\u1ea3 thi. Tuy nhi\u00ean, \u0111\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0a ra nh\u1eefng k\u1ebft qu\u1ea3 ch\u1eafc ch\u1eafn th\u00ec c\u00e1c nghi\u00ean c\u1ee9u n\u00e0y c\u1ea7n ti\u1ebfp t\u1ee5c tri\u1ec3n khai trong th\u1eddi gian t\u1edbi.<\/p>\n

-T\u1eeb k\u1ebft qu\u1ea3 kh\u1ea3o nghi\u1ec7m gi\u1ed1ng T\u1ebfch cho th\u1ea5y, T\u1ebfch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tr\u1ed3ng r\u1eebng\u00a0 b\u1eb1ng c\u00e2y con v\u00f4 t\u00ednh, tuy nhi\u00ean \u0111\u1ec3 ph\u00e1t tri\u1ec3n gi\u1ed1ng T\u1ebfch trong s\u1ea3n xu\u1ea5t c\u1ea7n c\u00f3 c\u00e1c nghi\u00ean c\u1ee9u c\u1ee5 th\u1ec3 v\u00e0 l\u00e2u d\u00e0i h\u01a1n c\u1ea3 v\u1ec1 m\u1eb7t gi\u1ed1ng v\u00e0 c\u00e1c k\u1ef9 thu\u1eadt l\u00e2m sinh.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u0110\u1eb6T V\u1ea4N \u0110\u1ec0 Trong ch\u01b0\u01a1ng tr\u00ecnh tr\u1ed3ng m\u1edbi 5 tri\u1ec7u h\u00e9c ta r\u1eebng, c\u00f3 3 tri\u1ec7u h\u00e9c ta r\u1eebng s\u1ea3n xu\u1ea5t bao g\u1ed3m 1 tri\u1ec7u h\u00e9c ta c\u00e2y c\u00f4ng nghi\u1ec7p d\u00e0i ng\u00e0y v\u00e0 2 tri\u1ec7u h\u00e9c ta c\u00e2y l\u00e2m nghi\u1ec7p. Trong \u0111\u00f3 c\u00f3 t\u1edbi 75% l\u00e0 c\u00e1c lo\u00e0i c\u00e2y keo, b\u1ea1ch \u0111\u00e0n, th\u00f4ng v\u00e0 tr\u00e0m, […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13668"}],"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=13668"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13668\/revisions"}],"predecessor-version":[{"id":13672,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13668\/revisions\/13672"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=13668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=13668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=13668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}