{"id":13759,"date":"2014-10-16T14:41:21","date_gmt":"2014-10-16T07:41:21","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=13759"},"modified":"2019-09-24T15:36:38","modified_gmt":"2019-09-24T08:36:38","slug":"bao-cao-ket-qua-de-tai-nghien-cuu-mot-so-dac-diem-sinh-ly-sinh-thai-mot-so-loai-cay-la-rong-ban-dia-lam-co-so-cho-viec-gay-trong-rung","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-ket-qua-de-tai-nghien-cuu-mot-so-dac-diem-sinh-ly-sinh-thai-mot-so-loai-cay-la-rong-ban-dia-lam-co-so-cho-viec-gay-trong-rung\/","title":{"rendered":"B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 \u0111\u1ec1 t\u00e0i: Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd, sinh th\u00e1i m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c g\u00e2y tr\u1ed3ng r\u1eebng"},"content":{"rendered":"

TS. H\u00e0 Th\u1ecb M\u1eebng<\/p>\n

Trung t\u00e2m NC sinh th\u00e1i v\u00e0 m\u00f4i tr\u01b0\u1eddng r\u1eebng<\/p>\n

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

D\u1ebb \u0111\u1ecf (Lithocarpus\u00a0 ducampii<\/i> A.Camus), Kh\u00e1o v\u00e0ng (Machilus odoratissima<\/i> Ness), v\u00e0 Gi\u00e1ng h\u01b0\u01a1ng (Pterocarpus macrocarpus<\/i> Kurz) l\u00e0 c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao \u0111ang b\u1ecb khai ph\u00e1 m\u1ed9t c\u00e1ch nghi\u00eam tr\u1ecdng. C\u1ea3 ba lo\u00e0i \u0111\u1ec1u r\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u1ed3ng ph\u1ee5c h\u1ed3i v\u00e0 l\u00e0m gi\u00e0u. \u0110\u00e2y c\u0169ng l\u00e0 c\u00e1c lo\u00e0i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 \u01b0u ti\u00ean cho tr\u1ed3ng r\u1eebng \u1edf Vi\u1ec7t Nam, trong \u0111\u00f3, D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y g\u1ed7 c\u00f3 \u00fd ngh\u0129a cho c\u1ea3i t\u1ea1o r\u1eebng ngh\u00e8o, Gi\u00e1ng h\u01b0\u01a1ng l\u00e0 c\u00e2y g\u1ed7 qu\u00fd c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao \u0111ang b\u1ecb \u0111e d\u1ecda. M\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng v\u1edbi ba \u0111\u1ed1i t\u01b0\u1ee3ng tr\u00ean \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng, song hi\u1ec3u bi\u1ebft v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd sinh th\u00e1i c\u1ee7a lo\u00e0i c\u00f2n \u00edt. Do \u0111\u00f3, nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd, sinh th\u00e1i c\u1ee7a ch\u00fang l\u00e0 c\u1ea7n thi\u1ebft nh\u1eb1m cung c\u1ea5p c\u00e1c th\u00f4ng tin c\u01a1 s\u1edf cho vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng v\u00e0 ph\u1ee5c h\u1ed3i r\u1eebng c\u00e2y b\u1ea3n \u0111\u1ecba.<\/p>\n

B\u00e0i b\u00e1o n\u00e0y tr\u00ecnh b\u00e0y t\u00f3m t\u1eaft k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i “Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh l\u00fd, sinh th\u00e1i m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c g\u00e2y tr\u1ed3ng r\u1eebng<\/i>” \u0111\u01b0\u1ee3c Trung t\u00e2m nghi\u00ean c\u1ee9u sinh th\u00e1i v\u00e0 m\u00f4i tr\u01b0\u1eddng r\u1eebng th\u1ef1c hi\u1ec7n t\u1eeb n\u0103m 2006 \u0111\u1ebfn 2009.<\/p>\n

\"Gianghuong1\"<\/a><\/p>\n

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

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

\u0110\u1ec1 t\u00e0i \u0111\u00e3 gi\u1ea3i quy\u1ebft c\u00e1c n\u1ed9i dung sau:<\/p>\n

1)\u00a0 Nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i qu\u1ea7n th\u1ec3 c\u01a1 b\u1ea3n c\u00e1c lo\u00e0i nghi\u00ean c\u1ee9u trong r\u1eebng t\u1ef1 nhi\u00ean v\u00e0 m\u00f4 h\u00ecnh ph\u1ee5c h\u1ed3i l\u00e0m gi\u00e0u r\u1eebng.<\/p>\n

2)\u00a0\u00a0\u00a0\u00a0 <\/i>Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m nhu c\u1ea7u \u00e1nh s\u00e1ng c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y nghi\u00ean c\u1ee9u \u1edf giai \u0111o\u1ea1n c\u00e2y con t\u1eeb khi gieo \u01b0\u01a1m \u0111\u1ebfn 4 n\u0103m tu\u1ed5i trong v\u01b0\u1eddn \u01b0\u01a1m.<\/p>\n

3)\u00a0\u00a0\u00a0\u00a0 <\/i>Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m nhu c\u1ea7u dinh d\u01b0\u1ee1ng c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y nghi\u00ean c\u1ee9u \u1edf c\u00e1c giai \u0111o\u1ea1n c\u00e2y con t\u1eeb khi gieo \u01b0\u01a1m \u0111\u1ebfn 2 n\u0103m tu\u1ed5i trong v\u01b0\u1eddn \u01b0\u01a1m.<\/p>\n

4)\u00a0\u00a0\u00a0\u00a0 <\/i>\u00a0Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a Keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng t\u1edbi s\u1ef1 n\u1ea3y m\u1ea7m c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u.<\/p>\n

5)\u00a0\u00a0\u00a0\u00a0 <\/i>\u0110\u1ec1 xu\u1ea5t m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt v\u1ec1 g\u00e2y tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng c\u00e1c lo\u00e0i c\u00e2y l\u00e1 r\u1ed9ng b\u1ea3n \u0111\u1ecba nghi\u00ean c\u1ee9u.<\/p>\n

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

– Ph\u01b0\u01a1ng ph\u00e1p k\u1ebf th\u1eeba: <\/i><\/b>K\u1ebf th\u1eeba c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u li\u00ean quan.<\/p>\n

\u00a0– Ph\u01b0\u01a1ng ph\u00e1p kh\u1ea3o s\u00e1t \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u01b0\u1eddng: <\/i><\/b>S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra theo \u00f4 ti\u00eau chu\u1ea9n (Mishra, 1968; Odum 1971, Rastogi, 1999 v\u00e0 Sharma, 2003) \u0111\u1ec3 \u0111i\u1ec1u tra t\u00ecnh h\u00ecnh ph\u00e2n b\u1ed1, sinh th\u00e1i c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng \u1edf r\u1eebng t\u1ef1 nhi\u00ean.<\/p>\n

– Ph\u01b0\u01a1ng ph\u00e1p b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m:<\/i><\/b><\/p>\n

\u00a0\u00a0 * Th\u00ed nghi\u1ec7m v\u1ec1 t\u1ef7 l\u1ec7 che s\u00e1ng cho c\u00e2y giai \u0111o\u1ea1n 1-2 tu\u1ed5i \u1edf v\u01b0\u1eddn \u01b0\u01a1m:<\/i><\/b>\u00a0\u00a0\u00a0 S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e0n che Turski. V\u1eadt li\u1ec7u che s\u00e1ng l\u00e0 l\u01b0\u1edbi nilon. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7, g\u1ed3m 4 c\u00f4ng th\u1ee9c (kh\u00f4ng che, che 25%, che 50% v\u00e0 che 75% \u00e1nh s\u00e1ng t\u1ef1 nhi\u00ean), m\u1ed7i c\u00f4ng th\u1ee9c l\u1eb7p l\u1ea1i 3 l\u1ea7n, m\u1ed7i l\u1ea7n l\u1eb7p c\u00f3 30 c\u00e2y.<\/p>\n

\u00a0\u00a0\u00a0* Th\u00ed nghi\u1ec7m v\u1ec1 b\u00f3n N, P v\u00e0 K cho c\u00e2y giai \u0111o\u1ea1n 1-2 tu\u1ed5i \u1edf \u00a0v\u01b0\u1eddn \u01b0\u01a1m: <\/i><\/b>Th\u00ed nghi\u1ec7m bao g\u1ed3m 5 c\u00f4ng th\u1ee9c b\u00f3n m\u1ed7i lo\u1ea1i ch\u1ea5t kho\u00e1ng cho c\u00e2y \u1edf giai \u0111o\u1ea1n 1 n\u0103m tu\u1ed5i v\u00e0 2 n\u0103m tu\u1ed5i, b\u1ed1 tr\u00ed theo kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7, 3 l\u1ea7n l\u1eb7p l\u1ea1i, m\u1ed7i l\u1ea7n l\u1eb7p c\u00f3 30 c\u00e2y.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0 * Th\u00ed nghi\u1ec7m v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a Keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng \u0111\u1ebfn s\u1ef1 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t gi\u1ed1ng: <\/i><\/b>Th\u00ed nghi\u1ec7m bao g\u1ed3m 13 c\u00f4ng th\u1ee9c, m\u1ed7i c\u00f4ng th\u1ee9c 3 l\u1ea7n l\u1eb7p, m\u1ed7i l\u1ea7n l\u1eb7p 50 h\u1ea1t.<\/p>\n

– Ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd s\u1ed1 li\u1ec7u:<\/i><\/b><\/p>\n

+ C\u00e1c ch\u1ec9 ti\u00eau ho\u00e1 t\u00ednh c\u1ee7a \u0111\u1ea5t \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u00f4ng th\u01b0\u1eddng t\u1ea1i Ph\u00f2ng th\u00ed nghi\u1ec7m – Trung t\u00e2m nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng.<\/p>\n

+ Ch\u1ec9 s\u1ed1 gi\u00e1 tr\u1ecb quan tr\u1ecdng (IVI) c\u1ee7a m\u1ed7i lo\u00e0i \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c c\u1ee7a Mishra, 1968.<\/p>\n

+ \u0110\u1ed9 phong ph\u00fa \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c c\u1ee7a Curtis and Mclntosh (1950)<\/p>\n

+ T\u1ef7 l\u1ec7 gi\u1eefa \u0111\u1ed9 phong ph\u00fa v\u00e0 t\u1ea7n su\u1ea5t c\u1ee7a m\u1ed7i lo\u00e0i (A\/F) x\u00e1c \u0111inh theo Odum, (1971) v\u00e0 Verma, (2000).<\/p>\n

+ H\u00e0m l\u01b0\u1ee3ng di\u1ec7p l\u1ee5c \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a Grodzinxki (1981); Fv\/Fm \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng m\u00e1y (Chlorophyll Fluorometer OS-30 USA. T\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i (RGR -mean relative growth rate) \u0111\u01b0\u1ee3c t\u00ednh d\u1ef1a tr\u00ean s\u1ef1 thay \u0111\u1ed5i v\u1ec1 sinh kh\u1ed1i v\u00e0 di\u1ec7n t\u00edch l\u00e1 c\u1ee7a c\u00e2y.<\/p>\n

+ D\u00f9ng ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai v\u00e0 ti\u00eau chu\u1ea9n t \u0111\u1ec3 ki\u1ec3m tra sai d\u1ecb gi\u1eefa c\u00e1c trung b\u00ecnh m\u1eabu v\u00e0 l\u1ef1a ch\u1ecdn c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t. X\u1eed l\u00fd s\u1ed1 li\u1ec7u theo ch\u01b0\u01a1ng tr\u00ecnh ph\u1ea7n m\u1ec1m excell.<\/p>\n

3. T\u00d3M T\u1eaeT K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U<\/b><\/p>\n

3.1. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng<\/b><\/p>\n

3.1.1. \u0110\u1eb7c \u0111i\u1ec3m sinh th\u00e1i qu\u1ea7n th\u1ec3 c\u01a1 b\u1ea3n c\u1ee7a D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng<\/b><\/p>\n

\u0110\u00e3 ti\u1ebfn h\u00e0nh \u0111i\u1ec1u tra \u1edf 9 \u0111\u1ecba \u0111i\u1ec3m c\u00f3 Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf ph\u00e2n b\u1ed1: 1 \u0111\u1ecba \u0111i\u1ec3m thu\u1ed9c t\u1ec9nh Ho\u00e0 b\u00ecnh (m\u00f4 h\u00ecnh l\u00e0m gi\u00e0u r\u1eebng tr\u00ean \u0111\u1ea5t tr\u00ean \u0111\u1ea5t v\u1eabn c\u00f2n r\u1eebng); 4 \u0111\u1ecba \u0111i\u1ec3m t\u1ea1i t\u1ec9nh Ph\u00fa Th\u1ecd, trong \u0111\u00f3 c\u00f3 1 \u0111\u1ecba \u0111i\u1ec3m l\u00e0 r\u1eebng tr\u1ed3ng (V\u00e2n \u0110\u1ed3n- \u0110oan H\u00f9ng – Ph\u00fa Th\u1ecd) v\u00e0 c\u00e1c \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c l\u00e0 r\u1eebng t\u1ef1 nhi\u00ean; 3 \u0111\u1ecba \u0111i\u1ec3m l\u00e0 r\u1eebng t\u1ef1 nhi\u00ean thu\u1ed9c t\u1ec9nh Th\u00e1i Nguy\u00ean v\u00e0 1 \u0111\u1ecba \u0111i\u1ec3m r\u1eebng t\u1ef1 nhi\u00ean thu\u1ed9c v\u01b0\u1eddn qu\u1ed1c gia Ba B\u1ec3- t\u1ec9nh B\u1eafc K\u1ea1n. K\u1ebft qu\u1ea3 cho th\u1ea5y:<\/p>\n

Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf ph\u00e2n b\u1ed1 nhi\u1ec1u \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh ph\u00eda B\u1eafc v\u00e0 ph\u00eda Nam. Th\u01b0\u1eddng m\u1ecdc \u1edf nh\u1eefng n\u01a1i c\u00f3 \u0111\u1ed9 cao tuy\u1ec7t \u0111\u1ed1i 200-500m, \u0111\u1ed9 d\u1ed1c 10-250<\/sup>, l\u01b0\u1ee3ng m\u01b0a 1292-2749mm\/n\u0103m, nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh n\u0103m 21,2-23,40<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i cao tuy\u1ec7t \u0111\u1ed1i 36-39,90<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i th\u1ea5p tuy\u1ec7t \u0111\u1ed1i 0-31,10<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i cao trung b\u00ecnh th\u00e1ng n\u00f3ng nh\u1ea5t 31,1-33,10<\/sup>C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i th\u1ea5p trung b\u00ecnh th\u00e1ng l\u1ea1nh nh\u1ea5t 10,8-13,70<\/sup>C.<\/p>\n

\u0110\u1ea5t trong c\u00e1c qu\u1ea7n th\u1ee5 c\u00f3 D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng ph\u00e2n b\u1ed1 h\u1ea7u h\u1ebft l\u00e0 \u0111\u1ea5t feral\u00edt n\u00e2u v\u00e0ng ho\u1eb7c n\u00e2u s\u1eabm ph\u00e1t tri\u1ec3n tr\u00ean \u0111\u00e1 sa phi\u1ebfn th\u1ea1ch, t\u1ea7ng \u0111\u1ea5t tr\u00ean 40cm. \u1ede \u0111\u1ed9 s\u00e2u 0 – 30 cm \u0111\u00e1 l\u1eabn chi\u1ebfm kho\u1ea3ng 5%, r\u1ec5 c\u00e2y chi\u1ebfm 10-20%; pHKCl bi\u1ebfn \u0111\u1ed9ng 3,12 – 4,68, thu\u00f4c lo\u1ea1i \u0111\u1ea5t chua; h\u00e0m l\u01b0\u1ee3ng m\u00f9n 1,51 – 5,12%, thu\u1ed9c lo\u1ea1i t\u1eeb ngh\u00e8o \u0111\u1ebfn gi\u00e0u; h\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m t\u1ed5ng s\u1ed1 0,07 – 0,34%, thu\u1ed9c lo\u1ea1i t\u1eeb ngh\u00e8o \u0111\u1ebfn gi\u00e0u; h\u00e0m l\u01b0\u1ee3ng kali d\u1ec5 ti\u00eau 5,12 – 107,40mg\/100 g \u0111\u1ea5t, thu\u1ed9c lo\u1ea1i t\u1eeb ngh\u00e8o \u0111\u1ebfn gi\u00e0u; h\u00e0m l\u01b0\u1ee3ng l\u00e2n d\u1ec5 ti\u00eau 3,13 – 25,30 mg\/100 g \u0111\u1ea5t thu\u1ed9c lo\u1ea1i t\u1eeb ngh\u00e8o \u0111\u1ebfn gi\u00e0u.<\/p>\n

Trong c\u00e1c l\u00e2m ph\u1ea7n c\u00f3 D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng t\u1ea1i c\u00e1c \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u, c\u00e1c lo\u00e0i trong qu\u1ea7n th\u1ec3 c\u00f3 gi\u00e1 tr\u1ecb IVI t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u. Hai lo\u00e0i Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf c\u00f3 gi\u00e1 tr\u1ecb IVI kh\u00f4ng cao trong r\u1eebng t\u1ef1 nhi\u00ean (D\u1ebb \u0111\u1ecf: 3,2-6,49; Kh\u00e1o v\u00e0ng: 4,9-10,33), ch\u1ee9ng t\u1ecf hai lo\u00e0i n\u00e0y kh\u00f4ng chi\u1ebfm \u01b0u th\u1ebf trong l\u00e2m ph\u1ea7n.<\/p>\n

T\u1ef7 l\u1ec7 A\/F c\u1ee7a c\u00e1c lo\u00e0i trong ph\u00e2m l\u1ea7n nghi\u00ean c\u1ee9u cho th\u1ea5y, hi\u1ec7n tr\u01b0\u1eddng t\u1ea1i Cao Phong – Ho\u00e0 B\u00ecnh kh\u00f4ng \u1ed5n \u0111\u1ecbnh, kh\u00f4ng ph\u1ed5 bi\u1ebfn trong t\u1ef1 nhi\u00ean; hi\u1ec7n tr\u01b0\u1eddng t\u1ea1i \u0110\u1ea1i An v\u00e0 V\u00e2n \u0110\u1ed3n – Ph\u00fa Th\u1ecd c\u00f3 t\u00ednh \u1ed5n \u0111\u1ecbnh th\u1ea5p; hi\u1ec7n tr\u01b0\u1eddng t\u1ea1i Ch\u00e2n M\u1ed9ng – Ph\u00fa Th\u1ecd t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh; hi\u1ec7n tr\u01b0\u1eddng t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Xu\u00e2n S\u01a1n \u0111\u00e3 b\u1ecb t\u00e1c \u0111\u1ed9ng m\u1ea1nh, \u0111ang trong qu\u00e1 tr\u00ecnh ph\u1ee5c h\u1ed3i; hi\u1ec7n tr\u01b0\u1eddng t\u1ea1i X\u00f3m Lu\u00f4ng v\u00e0 V\u0103n H\u00e1n – Th\u00e1i Nguy\u00ean, V\u01b0\u1eddn qu\u1ed1c gia Ba B\u1ec3 – B\u1eafc K\u1ea1n kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n

\u0110\u01b0\u1eddng cong \u0111a d\u1ea1ng \u01b0u th\u1ebf c\u1ee7a c\u00e1c lo\u00e0i trong l\u00e2m ph\u1ea7n c\u00f3 Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf ph\u00e2n b\u1ed1 t\u1ea1i c\u00e1c \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u \u0111\u1ec1u c\u00f3 d\u1ea1ng g\u1ea7n gi\u1ed1ng v\u1edbi d\u1ea1ng Logarit b\u00ecnh th\u01b0\u1eddng. C\u00e1c qu\u1ea7n th\u1ec3 n\u00e0y c\u00f3 t\u00ednh c\u1ea1nh tr\u1ea1nh cao, t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc cao v\u00e0 s\u1eed d\u1ee5ng c\u00f3 hi\u1ec7u qu\u1ea3 ngu\u1ed3n t\u00e0i nguy\u00ean thi\u00ean nhi\u00ean.<\/p>\n

T\u1ea1i V\u00e2n \u0110\u1ed3n – Ph\u00fa Th\u1ecd v\u00e0 V\u0103n H\u00e1n Th\u00e1i Nguy\u00ean, \u0111\u1ed3 th\u1ecb bi\u1ec3u th\u1ecb ph\u00e2n b\u1ed1 s\u1ed1 c\u00e2y theo c\u1ea5p k\u00ednh c\u1ee7a l\u00e2m ph\u1ea7n l\u00e0 ph\u00e2n b\u1ed1 gi\u1ea3m. Hi\u1ec7n tr\u01b0\u1eddng \u1edf hai n\u01a1i n\u00e0y cung c\u1ea5p \u0111\u1ee7 c\u00e2y con cho qu\u00e1 tr\u00ecnh \u0111\u00e0o th\u1ea3i t\u1ef1 nhi\u00ean. \u1ede c\u00e1c hi\u1ec7n tr\u01b0\u1eddng nghi\u00ean c\u1ee9u kh\u00e1c c\u00f3 Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf ph\u00e2n b\u1ed1 \u0111\u1ec1u kh\u00f4ng \u0111\u1ea3m b\u1ea3o cung c\u1ea5p \u0111\u1ee7 c\u00e2y con cho qu\u00e1 tr\u00ecnh \u0111\u00e0o th\u1ea3i t\u1ef1 nhi\u00ean.<\/p>\n

3<\/b>.1<\/b>.2<\/b>. Nhu c\u1ea7u \u00e1nh s\u00e1ng c\u1ee7a D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng trong v\u01b0\u1eddn \u01b0\u01a1m<\/b><\/p>\n

Kh\u00e1o v\u00e0ng giai \u0111o\u1ea1n 1-4 n\u0103m tu\u1ed5i l\u00e0 c\u00e2y ch\u1ecbu b\u00f3ng. T\u1ef7 l\u1ec7 che s\u00e1ng th\u00edch h\u1ee3p cho Kh\u00e1o v\u00e0ng giai \u0111o\u1ea1n 1-6 th\u00e1ng tu\u1ed5i l\u00e0 che 75% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1, giai \u0111o\u1ea1n 7 th\u00e1ng \u0111\u1ebfn 4 n\u0103m tu\u1ed5i l\u00e0 50%. C\u00e2y 24 th\u00e1ng tu\u1ed5i \u1edf c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t c\u00f3 Hvn<\/sub> = 93,11cm; D0<\/sub> = 9,7mm; RGR = 0,0014mg\/g\/ng\u00e0y; h\u00e0m l\u01b0\u1ee3ng di\u1ec7p l\u1ee5c = 1,99mg\/g l\u00e1 t\u01b0\u01a1i, t\u1ef7 l\u1ec7 dla\/dlb l\u00e0 1,97; Fv\/Fm = 0,761.<\/p>\n

D\u1ebb \u0111\u1ecf giai \u0111o\u1ea1n 1-3 tu\u1ed5i ch\u1ecbu b\u00f3ng. T\u1ef7 l\u1ec7 che s\u00e1ng th\u00edch h\u1ee3p cho c\u00e2y giai \u0111o\u1ea1n 1 n\u0103m\u00a0 tu\u1ed5i l\u00e0 75%, giai \u0111o\u1ea1n 2 n\u0103m tu\u1ed5i l\u00e0 50%, v\u00e0 giai \u0111o\u1ea1n 3 n\u0103m tu\u1ed5i l\u00e0\u00a0 25%. C\u00e2y 24 th\u00e1ng tu\u1ed5i \u1edf c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t c\u00f3 Hvn<\/sub> = 86,7cm; D0<\/sub> = 8,5mm; RGR = 0,0046mg\/g\/ng\u00e0y; h\u00e0m l\u01b0\u1ee3ng di\u1ec7p l\u1ee5c = 3,78mg\/g l\u00e1 t\u01b0\u01a1i, t\u1ef7 l\u1ec7 dla\/dlb l\u00e0 2,86; Fv\/Fm = 0,767.<\/p>\n

3.1.3. Nhu c\u1ea7u dinh d\u01b0\u1ee1ng c\u1ee7a D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng trong v\u01b0\u1eddn \u01b0\u01a1m<\/b><\/p>\n

Kh\u00e1o v\u00e0ng: L\u01b0\u1ee3ng N, P v\u00e0 K th\u00edch h\u1ee3p nh\u1ea5t cho sinh tr\u01b0\u1edfng c\u1ee7a Kh\u00e1o v\u00e0ng giai \u0111o\u1ea1n 1 tu\u1ed5i l\u00e0 57,3 mgN + 76,33 mgP2<\/sub>O5<\/sub> + 34,4 mgK2<\/sub>O\/kg \u0111\u1ea5t b\u1ea7u; giai \u0111o\u1ea1n 2 tu\u1ed5i l\u00e0 76,3 mgN + 114,5 mgP2<\/sub>O5<\/sub> + 45,8 mgK2<\/sub>O\/kg \u0111\u1ea5t b\u1ea7u. C\u00e2y 24 th\u00e1ng tu\u1ed5i \u1edf c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t c\u00f3 Hvn<\/sub> = 94,7cm; D0<\/sub> = 9,85mm; RGR = 0,008 mg\/g\/ng\u00e0y; h\u00e0m l\u01b0\u1ee3ng N = 0,85%; h\u00e0m l\u01b0\u1ee3ng P2<\/sub>O5<\/sub> = 0,63%; h\u00e0m l\u01b0\u1ee3ng K2<\/sub>O = 0,95%.<\/p>\n

D\u1ebb \u0111\u1ecf: L\u01b0\u1ee3ng N, P v\u00e0 K th\u00edch h\u1ee3p nh\u1ea5t cho sinh tr\u01b0\u1edfng c\u1ee7a D\u1ebb \u0111\u1ecf giai \u0111o\u1ea1n 1 tu\u1ed5i l\u00e0 38,17 mgN + 76,33 mgP2<\/sub>O5<\/sub> + 22,90 mgK2<\/sub>O\/kg \u0111\u1ea5t b\u1ea7u; giai \u0111o\u1ea1n 2 tu\u1ed5i l\u00e0 57,3 mgN\/kg + 152,7 mgP2<\/sub>O5<\/sub> + 34,4 mgK2<\/sub>O\/kg \u0111\u1ea5t b\u1ea7u. C\u00e2y 24 th\u00e1ng tu\u1ed5i \u1edf c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t c\u00f3 Hvn<\/sub> = 83,2cm; D0<\/sub> = 8,49mm; RGR = 0,005mg\/g\/ng\u00e0y; h\u00e0m l\u01b0\u1ee3ng N = 0,86%; h\u00e0m l\u01b0\u1ee3ng P2<\/sub>O5<\/sub> = 0,83%; h\u00e0m l\u01b0\u1ee3ng K2<\/sub>O = 0,78%.<\/p>\n

3.1.4. \u1ea2nh h\u01b0\u1edfng c\u1ee7a Keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng t\u1edbi s\u1ef1 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng<\/b><\/p>\n

D\u1ecbch chi\u1ebft l\u00e1 Keo lai 20% \u0111\u00e3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t D\u1ebb \u0111\u1ecf, trong khi \u0111\u00f3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Kh\u00e1o v\u00e0ng \u1edf\u00a0 \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c 30%. D\u1ecbch chi\u1ebft r\u1ec5 Keo lai \u0111\u00e3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t D\u1ebb \u0111\u1ecf \u1edf \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c 20%\u00a0 song kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Kh\u00e1o v\u00e0ng. D\u1ecbch chi\u1ebft th\u1ea3m m\u1ee5c Keo lai\u00a0 \u1ea3nh h\u01b0\u1edfng kh\u00f4ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a c\u1ea3 2 lo\u00e0i.<\/p>\n

D\u1ecbch chi\u1ebft l\u00e1 Keo tai t\u01b0\u1ee3ng \u1edf \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c 30% \u0111\u00e3 l\u00e0m gi\u1ea3m t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Kh\u00e1o v\u00e0ng xu\u1ed1ng 36,0% so v\u1edbi \u0111\u1ed1i ch\u1ee9ng, trong khi d\u1ecbch chi\u1ebft r\u1ec5 v\u00e0 th\u1ea3m m\u1ee5c 5-30% l\u00e0m gi\u1ea3m kh\u00f4ng \u0111\u00e1ng k\u1ec3 t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t. D\u1ecbch chi\u1ebft l\u00e1 Keo tai t\u01b0\u1ee3ng \u1edf \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c 10- 30% \u0111\u00e3 l\u00e0m gi\u1ea3m t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t D\u1ebb \u0111\u1ecf xu\u1ed1ng 22,7-43,7%; d\u1ecbch chi\u1ebft r\u1ec5 20-30% l\u00e0m gi\u1ea3m 20,4-26,0% t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t so v\u1edbi \u0111\u1ed1i ch\u1ee9ng v\u00e0 d\u1ecbch chi\u1ebft th\u1ea3m m\u1ee5c kh\u00f4ng \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn s\u1ef1 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t.<\/p>\n

3.1.5. \u0110\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng D\u1ebb \u0111\u1ecf v\u00e0 Kh\u00e1o v\u00e0ng<\/b><\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf. N\u1ed9i dung \u0111\u1ec1 xu\u1ea5t bao g\u1ed3m t\u1eeb x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i, k\u1ef9 thu\u1eadt t\u1ea1o c\u00e2y con, k\u1ef9 thu\u1eadt tr\u1ed3ng, ch\u0103m s\u00f3c \u0111\u1ebfn khi r\u1eebng kh\u00e9p t\u00e1n v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt ph\u1ee5c h\u1ed3i r\u1eebng b\u1eb1ng khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh c\u00f3 tr\u1ed3ng b\u1ed5 sung.<\/p>\n

3.2. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 Gi\u00e1ng h\u01b0\u01a1ng<\/b><\/p>\n

3.<\/b>2<\/b>.1. \u0110\u1eb7c \u0111i\u1ec3m sinh th\u00e1i qu\u1ea7n th\u1ec3 c\u01a1 b\u1ea3n c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng<\/b><\/p>\n

\u0110\u00e3 ti\u1ebfn h\u00e0nh thu th\u1eadp s\u1ed1 li\u1ec7u th\u1ee9 c\u1ea5p v\u1ec1 ph\u00e2n b\u1ed1 c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng v\u00e0 \u0111i\u1ec1u tra \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i qu\u1ea7n th\u1ec3 c\u01a1 b\u1ea3n c\u1ee7a lo\u00e0i t\u1ea1i v\u01b0\u1eddn qu\u1ed1c gia Yok Don:<\/p>\n

Gi\u00e1ng h\u01b0\u01a1ng ph\u00e2n b\u1ed1 ch\u1ee7 y\u1ebfu \u1edf c\u00e1c t\u1ec9nh T\u00e2y Nguy\u00ean v\u00e0 Nam B\u1ed9, n\u01a1i c\u00f3 nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n n\u0103m 21,9-26,90C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i cao tuy\u1ec7t \u0111\u1ed1i 36-42,70C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i th\u1ea5p tuy\u1ec7t \u0111\u1ed1i 1,7-150C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i cao trung b\u00ecnh th\u00e1ng n\u00f3ng nh\u1ea5t 29,7-35,30C, nhi\u1ec7t \u0111\u1ed9 t\u1ed1i th\u1ea5p b\u00ecnh qu\u00e2n th\u00e1ng l\u1ea1nh nh\u1ea5t 10,4-20,90C, l\u01b0\u1ee3ng m\u01b0a 1286,3-2172,1mm\/n\u0103m. T\u1ea1i v\u01b0\u1eddn qu\u1ed1c gia Yok Don, \u0111\u1ea5t c\u00f3 Gi\u00e1ng h\u01b0\u01a1ng ph\u00e2n b\u1ed1 h\u1ea7u h\u1ebft l\u00e0 \u0111\u1ea5t x\u00e1m ph\u00e1t tri\u1ec3n tr\u00ean \u0111\u00e1 sa th\u1ea1ch, phi\u1ebfn s\u00e9t v\u00e0 granit, \u0111\u1ea5t chua, h\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng t\u1eeb ngh\u00e8o \u0111\u1ebfn gi\u00e0u.<\/p>\n

Trong l\u00e2m ph\u1ea7n c\u00f3 Gi\u00e1ng h\u01b0\u01a1ng ph\u00e2n b\u1ed1 t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Yok Don, c\u00e1c lo\u00e0i trong qu\u1ea7n th\u1ec3 c\u00f3 tr\u1eadt t\u1ef1 \u01b0u th\u1ebf v\u00e0 ph\u00e1t tri\u1ec3n \u1ed5n \u0111\u1ecbnh, chia s\u1ebb t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng \u0111\u1ec1u c\u00e1c gi\u00e1 tr\u1ecb IVI. Gi\u00e1 tr\u1ecb IVI c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng l\u00e0 32\/300, c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng t\u00e1i sinh l\u00e0 69,2\/300, chi\u1ebfm \u01b0u th\u1ebf cao nh\u1ea5t trong l\u00e2m ph\u1ea7n. T\u1ef7 l\u1ec7 A\/F c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn h\u1ea7u h\u1ebft c\u00f3 d\u1ea1ng ph\u00e2n b\u1ed1 contagious, ch\u1ee9ng t\u1ecf hi\u1ec7n tr\u01b0\u1eddng \u1edf \u0111\u00e2y t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/p>\n

\u0110\u01b0\u1eddng cong \u0111a d\u1ea1ng \u01b0u th\u1ebf D-D Curve c\u1ee7a c\u00e1c lo\u00e0i trong l\u00e2m ph\u1ea7n c\u00f3 Gi\u00e1ng h\u01b0\u01a1ng ph\u00e2n b\u1ed1 tai V\u01b0\u1eddn qu\u1ed1c gia Yok Don c\u00f3 d\u1ea1ng g\u1ea7n v\u1edbi d\u1ea1ng logarit b\u00ecnh th\u01b0\u1eddng. Qu\u1ea7n th\u1ec3 n\u00e0y c\u00f3 t\u00ednh c\u1ea1nh tranh cao gi\u1eefa c\u00e1c lo\u00e0i, t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc cao v\u00e0 s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 ngu\u1ed3n t\u00e0i nguy\u00ean thi\u00ean nhi\u00ean.<\/p>\n

\u0110\u1ed3 th\u1ecb bi\u1ec3u di\u1ec5n s\u1ed1 l\u01b0\u1ee3ng c\u00e2y theo c\u1ea5p k\u00ednh t\u1ea1i l\u00e2m ph\u1ea7n \u1edf Yok Don c\u00f3 d\u1ea1ng ph\u00e2n b\u1ed1 gi\u1ea3m. \u0110\u00e2y l\u00e0 d\u1ea1ng ph\u00e2n b\u1ed1 chu\u1ea9n trong t\u1ef1 nhi\u00ean v\u00e0 l\u00e2m ph\u1ea7n n\u00e0y kh\u00e1 b\u1ec1n v\u1eefng v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 ch\u1ee9c n\u0103ng.<\/p>\n

3.2.2. Nhu c\u1ea7u \u00e1nh s\u00e1ng c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng trong v\u01b0\u1eddn \u01b0\u01a1m<\/b><\/p>\n

Giai \u0111o\u1ea1n 1 n\u0103m tu\u1ed5i, Gi\u00e1ng h\u01b0\u01a1ng c\u1ea7n \u0111\u01b0\u1ee3c che s\u00e1ng, t\u1ef7 l\u1ec7 che th\u00edch h\u1ee3p cho c\u00e2y 6 th\u00e1ng tu\u1ed5i l\u00e0 50%, 12 th\u00e1ng tu\u1ed5i l\u00e0 25%. Giai \u0111o\u1ea1n 2 n\u0103m tu\u1ed5i, Gi\u00e1ng h\u01b0\u01a1ng c\u1ea7n 100% \u00e1nh s\u00e1ng t\u1ef1 nhi\u00ean. C\u00e2y 24 th\u00e1ng tu\u1ed5i \u1edf c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t c\u00f3 Hvn<\/sub> = 86,2cm; D0<\/sub> = 9,6mm; RGR = 0,002mg\/g\/ng\u00e0y; h\u00e0m l\u01b0\u1ee3ng di\u1ec7p l\u1ee5c = 3,92mg\/g l\u00e1 t\u01b0\u01a1i, t\u1ef7 l\u1ec7 dla\/dlb l\u00e0 3,02; Fv\/Fm = 0,786.<\/p>\n

3.2.3. Nhu c\u1ea7u dinh d\u01b0\u1ee1ng kho\u00e1ng c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng trong v\u01b0\u1eddn \u01b0\u01a1m<\/b><\/p>\n

L\u01b0\u1ee3ng N, P v\u00e0 K th\u00edch h\u1ee3p nh\u1ea5t cho sinh tr\u01b0\u1edfng c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng giai \u0111o\u1ea1n 1 tu\u1ed5i l\u00e0 38,17 mgN\/kg + 76,33 mgP2<\/sub>O5<\/sub>\/kg + 22,90 mgK2<\/sub>0\/kg \u0111\u1ea5t b\u1ea7u, cho c\u00e2y giai \u0111o\u1ea1n 2 tu\u1ed5i l\u00e0 57,3 mgN\/kg + 114,5 mgP2<\/sub>O5<\/sub>\/kg + 45,8 mgK2<\/sub>0\/kg \u0111\u1ea5t b\u1ea7u. C\u00e2y 24 th\u00e1ng tu\u1ed5i \u1edf c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t c\u00f3\u00a0 Hvn<\/sub> = 98,1cm; D0<\/sub> = 11,75mm; h\u00e0m l\u01b0\u1ee3ng N = 1,87%; h\u00e0m l\u01b0\u1ee3ng P2<\/sub>O5<\/sub> = 0,43%; h\u00e0m l\u01b0\u1ee3ng K2<\/sub>O = 1,12%.<\/p>\n

3.2.4. \u1ea2nh h\u01b0\u1edfng c\u1ee7a Keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng t\u1edbi s\u1ef1 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Gi\u00e1ng h\u01b0\u01a1ng<\/b><\/p>\n

D\u1ecbch chi\u1ebft l\u00e1 v\u00e0 r\u1ec5 Keo lai 30% \u0111\u00e3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Gi\u00e1ng h\u01b0\u01a1ng \u1edf\u00a0 \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c 30%. D\u1ecbch chi\u1ebft th\u1ea3m m\u1ee5c Keo lai \u1ea3nh h\u01b0\u1edfng kh\u00f4ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a Gi\u00e1ng h\u01b0\u01a1ng.<\/p>\n

D\u1ecbch chi\u1ebft l\u00e1 Keo tai t\u01b0\u1ee3ng \u1edf \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c 30% \u0111\u00e3 l\u00e0m gi\u1ea3m t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Gi\u00e1ng h\u01b0\u01a1ng xu\u1ed1ng 28,6% so v\u1edbi \u0111\u1ed1i ch\u1ee9ng, trong khi d\u1ecbch chi\u1ebft r\u1ec5 v\u00e0 th\u1ea3m m\u1ee5c l\u00e0m gi\u1ea3m kh\u00f4ng \u0111\u00e1ng k\u1ec3 t\u1ef7 l\u1ec7 n\u00e0y.<\/p>\n

3.2.<\/b>5<\/b>. <\/b>\u0110\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng Gi\u00e1ng h\u01b0\u01a1ng<\/b><\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng Gi\u00e1ng h\u01b0\u01a1ng. N\u1ed9i dung \u0111\u1ec1 xu\u1ea5t bao g\u1ed3m t\u1eeb x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i, k\u1ef9 thu\u1eadt t\u1ea1o c\u00e2y con, k\u1ef9 thu\u1eadt tr\u1ed3ng, ch\u0103m s\u00f3c \u0111\u1ebfn khi r\u1eebng kh\u00e9p t\u00e1n v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt ph\u1ee5c h\u1ed3i r\u1eebng b\u1eb1ng khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh c\u00f3 tr\u1ed3ng b\u1ed5 sung.<\/p>\n

\u00a0<\/i><\/b>4. K\u1ebeT LU\u1eacN<\/b> V\u00c0 KI\u1ebeN NGH\u1eca<\/b><\/p>\n

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

– Gi\u00e1ng h\u01b0\u01a1ng ph\u00e2n b\u1ed1 \u1edf nh\u1eefng n\u01a1i c\u00f3 nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh n\u0103m 21,9 –\u00a0 26,90C, l\u01b0\u1ee3ng m\u01b0a 1268,3 – 2172,1mm\/n\u0103m, l\u01b0\u1ee3ng b\u1ed1c h\u01a1i 867,1 – 1435,5mm\/n\u0103m, tr\u00ean \u0111\u1ea5t c\u00f3 h\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng t\u1eeb ngh\u00e8o \u0111\u1ebfn kh\u00e1. Trong c\u00e1c l\u00e2m ph\u1ea7n “\u00a0\u00a0\u00a0\u00a0\u00a0 `1t\u1ea1i v\u01b0\u1eddn qu\u1ed1c gia Yok Don, Gi\u00e1ng h\u01b0\u01a1ng chi\u1ebfm \u01b0u th\u1ebf trong l\u00e2m ph\u1ea7n; T\u1ef7 l\u1ec7 che s\u00e1ng th\u00edch h\u1ee3p cho c\u00e2y 6 th\u00e1ng tu\u1ed5i l\u00e0 50%, 12 th\u00e1ng tu\u1ed5i l\u00e0 25%, sau \u0111\u00f3 Gi\u00e1ng h\u01b0\u01a1ng c\u1ea7n 100% \u00e1nh s\u00e1ng t\u1ef1 nhi\u00ean. L\u01b0\u1ee3ng ch\u1ea5t kho\u00e1ng th\u00edch h\u1ee3p cho Gi\u00e1ng h\u01b0\u01a1ng giai \u0111o\u1ea1n 1 n\u0103m tu\u1ed5i trong v\u01b0\u1eddn \u01b0\u01a1m l\u00e0 38,17 mgN\/kg \u0111\u1ea5t b\u1ea7u + 76,3 mg P2O5\/kg \u0111\u1ea5t b\u1ea7u + 22,9 mg K2O\/kg \u0111\u1ea5t b\u1ea7u; giai \u0111o\u1ea1n 2 n\u0103m tu\u1ed5i l\u00e0 57,30 mgN\/kg \u0111\u1ea5t b\u1ea7u + 114,5 mg P2O5\/kg \u0111\u1ea5t b\u1ea7u + 45,8 mg K2O\/kg \u0111\u1ea5t b\u1ea7u. D\u1ecbch chi\u1ebft l\u00e1 v\u00e0 r\u1ec5 c\u1ee7a Keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng \u1edf \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c 30% \u0111\u00e3 l\u00e0m gi\u1ea3m t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Gi\u00e1ng h\u01b0\u01a1ng.<\/p>\n

– Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf ph\u00e2n b\u1ed1 nhi\u1ec1u \u1edf nh\u1eefng n\u01a1i c\u00f3 \u0111\u1ed9 cao tuy\u1ec7t \u0111\u1ed1i 200-500m, \u0111\u1ed9 d\u1ed1c 10-250, l\u01b0\u1ee3ng m\u01b0a 1292-2749mm\/n\u0103m, nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh n\u0103m 21,2-23,40C, \u0111\u1ea5t Feralit n\u00e2u v\u00e0ng ho\u1eb7c n\u00e2u s\u1eabm ph\u00e1t tri\u1ec3n tr\u00ean \u0111\u00e1 sa phi\u1ebfn th\u1ea1ch, \u0111\u1ea5t chua, h\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng t\u1eeb ngh\u00e8o \u0111\u1ebfn gi\u00e0u. Trong c\u00e1c l\u00e2m ph\u1ea7n nghi\u00ean c\u1ee9u Kh\u00e1o v\u00e0ng v\u00e0 D\u1ebb \u0111\u1ecf kh\u00f4ng chi\u1ebfm \u01b0u th\u1ebf trong l\u00e2m ph\u1ea7n, \u0111a s\u1ed1 c\u00e1c l\u00e2m ph\u1ea7n kh\u00f4ng \u1ed5n \u0111\u1ecbnh, kh\u00f4ng cung c\u1ea5p \u0111\u1ee7 c\u00e2y con cho qu\u00e1 tr\u00ecnh \u0111\u00e0o th\u1ea3i t\u1ef1 nhi\u00ean. Kh\u00e1o v\u00e0ng giai \u0111o\u1ea1n 1-4 n\u0103m tu\u1ed5i l\u00e0 c\u00e2y ch\u1ecbu b\u00f3ng.<\/p>\n

– T\u1ef7 l\u1ec7 che s\u00e1ng th\u00edch h\u1ee3p cho Kh\u00e1o v\u00e0ng giai \u0111o\u1ea1n 1-6 th\u00e1ng tu\u1ed5i l\u00e0 che 75% \u00e1nh s\u00e1ng tr\u1ef1c x\u1ea1, giai \u0111o\u1ea1n 7 th\u00e1ng \u0111\u1ebfn 4 n\u0103m tu\u1ed5i l\u00e0 50%. L\u01b0\u1ee3ng N, P v\u00e0 K th\u00edch h\u1ee3p nh\u1ea5t cho sinh tr\u01b0\u1edfng c\u1ee7a Kh\u00e1o v\u00e0ng giai \u0111o\u1ea1n 1 tu\u1ed5i l\u00e0 57,3 mgN\/kg + 76,33 mgP2O5\/kg + 34,4 mgK2O\/kg \u0111\u1ea5t b\u1ea7u; giai \u0111o\u1ea1n 2 tu\u1ed5i l\u00e0 76,3 mgN\/kg + 114,5 mgP2O5\/kg + 45,8 mgK2O\/kg \u0111\u1ea5t b\u1ea7u. D\u1ecbch chi\u1ebft l\u00e1 v\u00e0 r\u1ec5 Keo lai v\u00e0 Keo tai t\u01b0\u1ee3ng l\u00e0m gi\u1ea3m t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t Kh\u00e1o v\u00e0ng.<\/p>\n

– T\u1ef7 l\u1ec7 che s\u00e1ng th\u00edch h\u1ee3p cho D\u1ebb \u0111\u1ecf giai \u0111o\u1ea1n 1 n\u0103m\u00a0 tu\u1ed5i l\u00e0 75%, giai \u0111o\u1ea1n 2 n\u0103m tu\u1ed5i l\u00e0 50%, v\u00e0 giai \u0111o\u1ea1n 3 n\u0103m tu\u1ed5i l\u00e0\u00a0 25%. L\u01b0\u1ee3ng N, P v\u00e0 K th\u00edch h\u1ee3p nh\u1ea5t cho sinh tr\u01b0\u1edfng c\u1ee7a D\u1ebb \u0111\u1ecf giai \u0111o\u1ea1n 1 tu\u1ed5i l\u00e0 38,17 mgN\/kg + 76,33 mgP2<\/sub>O5<\/sub>\/kg + 22,90 mgK2<\/sub>O\/kg \u0111\u1ea5t b\u1ea7u; giai \u0111o\u1ea1n 2 tu\u1ed5i l\u00e0 57,3 mgN\/kg + 152,7 mgP2<\/sub>O5<\/sub>\/kg + 34,4 mgK2<\/sub>O\/kg \u0111\u1ea5t b\u1ea7u. D\u1ecbch chi\u1ebft l\u00e1 v\u00e0 r\u1ec5 Keo lai, Keo tai t\u01b0\u1ee3ng \u0111\u00e3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng n\u1ea3y m\u1ea7m c\u1ee7a h\u1ea1t D\u1ebb \u0111\u1ecf.<\/p>\n

– \u0110\u1ec1 t\u00e0i \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng D\u1ebb \u0111\u1ecf, Kh\u00e1o v\u00e0ng v\u00e0 Gi\u00e1ng h\u01b0\u01a1ng. N\u1ed9i dung \u0111\u1ec1 xu\u1ea5t bao g\u1ed3m t\u1eeb x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i, k\u1ef9 thu\u1eadt t\u1ea1o c\u00e2y con, k\u1ef9 thu\u1eadt tr\u1ed3ng, ch\u0103m s\u00f3c \u0111\u1ebfn khi r\u1eebng kh\u00e9p t\u00e1n v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt ph\u1ee5c h\u1ed3i r\u1eebng b\u1eb1ng khoanh nu\u00f4i x\u00fac ti\u1ebfn t\u00e1i sinh c\u00f3 tr\u1ed3ng b\u1ed5 sung.<\/p>\n

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

V\u1eadn d\u1ee5ng \u0111\u1ec1 xu\u1ea5t k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng ph\u1ee5c h\u1ed3i r\u1eebng Kh\u00e1o v\u00e0ng, D\u1ebb \u0111\u1ecf v\u00e0 Gi\u00e1ng h\u01b0\u01a1ng c\u1ee7a \u0111\u1ec1 t\u00e0i v\u00e0o th\u1ef1c t\u1ebf s\u1ea3n xu\u1ea5t.<\/p>\n","protected":false},"excerpt":{"rendered":"

TS. H\u00e0 Th\u1ecb M\u1eebng Trung t\u00e2m NC sinh th\u00e1i v\u00e0 m\u00f4i tr\u01b0\u1eddng r\u1eebng 1. \u0110\u1eb6T V\u1ea4N \u0110\u1ec0 D\u1ebb \u0111\u1ecf (Lithocarpus\u00a0 ducampii A.Camus), Kh\u00e1o v\u00e0ng (Machilus odoratissima Ness), v\u00e0 Gi\u00e1ng h\u01b0\u01a1ng (Pterocarpus macrocarpus Kurz) l\u00e0 c\u00e1c lo\u00e0i c\u00e2y g\u1ed7 c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao \u0111ang b\u1ecb khai ph\u00e1 m\u1ed9t c\u00e1ch nghi\u00eam tr\u1ecdng. C\u1ea3 ba lo\u00e0i […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13759"}],"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=13759"}],"version-history":[{"count":4,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13759\/revisions"}],"predecessor-version":[{"id":19163,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13759\/revisions\/19163"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=13759"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=13759"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=13759"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}