{"id":14644,"date":"2015-04-09T09:26:26","date_gmt":"2015-04-09T02:26:26","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=14644"},"modified":"2015-04-09T09:28:10","modified_gmt":"2015-04-09T02:28:10","slug":"bao-caco-tom-tat-ket-qua-de-tai-nghien-cuu-chon-giong-va-bien-phap-ky-thuat-trong-rung-so-tham-canh-cho-vung-tay-bac-dong-bac-va-bac-trung-bo","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-caco-tom-tat-ket-qua-de-tai-nghien-cuu-chon-giong-va-bien-phap-ky-thuat-trong-rung-so-tham-canh-cho-vung-tay-bac-dong-bac-va-bac-trung-bo\/","title":{"rendered":"B\u00e1o c\u00e1o t\u00f3m t\u1eaft k\u1ebft qu\u1ea3 \u0111\u1ec1 t\u00e0i: Nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh cho v\u00f9ng T\u00e2y B\u1eafc, \u0110\u00f4ng B\u1eafc v\u00e0 B\u1eafc trung b\u1ed9"},"content":{"rendered":"

TS. Ho\u00e0ng V\u0103n Th\u1eafng<\/em><\/p>\n

\u00a0\u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/strong><\/p>\n

S\u1edf l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u0111a t\u00e1c d\u1ee5ng, ngo\u00e0i gi\u00e1 tr\u1ecb ph\u00f2ng h\u1ed9, S\u1edf c\u00f2n c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. S\u1ea3n ph\u1ea9m ch\u00ednh c\u1ee7a c\u00e2y S\u1edf l\u00e0 l\u1ea5y h\u1ea1t \u00e9p d\u1ea7u, m\u1ed9t trong c\u00e1c lo\u1ea1i d\u1ea7u \u0103n t\u1eeb th\u1ef1c v\u1eadt c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng cao. \u1ede Vi\u1ec7t Nam, trong nh\u1eefng n\u0103m tr\u01b0\u1edbc \u0111\u00e2y, c\u00e2y S\u1edf \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng tr\u00ean nhi\u1ec1u d\u1ea1ng l\u1eadp \u0111\u1ecba \u1edf c\u00e1c t\u1ec9nh t\u1eeb ph\u00eda B\u1eafc \u0111\u1ebfn c\u00e1c t\u1ec9nh mi\u1ec1n Trung theo c\u00e1c Ch\u01b0\u01a1ng tr\u00ecnh, D\u1ef1 \u00e1n c\u1ee7a Nh\u00e0 n\u01b0\u1edbc v\u00e0 t\u1ef1 ph\u00e1t c\u1ee7a ng\u01b0\u1eddi d\u00e2n \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng. Th\u1ef1c ti\u1ec5n cho th\u1ea5y, h\u1ea7u h\u1ebft c\u00e1c gi\u1ed1ng S\u1edf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u1ed3ng r\u1eebng trong s\u1ea3n xu\u1ea5t hi\u1ec7n nay l\u00e0 gi\u1ed1ng ch\u01b0a \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc. Ng\u01b0\u1eddi d\u00e2n th\u01b0\u1eddng l\u1ea5y h\u1ea1t c\u1ee7a c\u00e1c c\u00e2y S\u1edf trong v\u01b0\u1eddn, r\u1eebng \u0111\u1ec3 gieo \u01b0\u01a1m v\u00e0 g\u00e2y tr\u1ed3ng m\u00e0 ch\u01b0a c\u00f3 s\u1ef1 ch\u1ecdn l\u1ecdc v\u00e0 ki\u1ec3m tra v\u1ec1 h\u00e0m l\u01b0\u1ee3ng d\u1ea7u c\u1ee7a ch\u00fang. Ngo\u00e0i ra, c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf ch\u1ee7 y\u1ebfu hi\u1ec7n nay v\u1eabn l\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p tr\u1ed3ng qu\u1ea3ng canh. Vi\u1ec7c tr\u1ed3ng r\u1eebng th\u00e2m canh ch\u01b0a \u0111\u01b0\u1ee3c quan t\u00e2m nhi\u1ec1u. Do \u0111\u00f3 n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a c\u00e1c r\u1eebng S\u1edf \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u01b0\u1eddng kh\u00f4ng cao. \u0110\u1ee9ng tr\u01b0\u1edbc t\u00ecnh h\u00ecnh \u0111\u00f3, vi\u1ec7c nghi\u00ean c\u1ee9u tuy\u1ec3n ch\u1ecdn c\u00e1c gi\u1ed1ng S\u1edf n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng cao c\u0169ng nh\u01b0 x\u00e1c \u0111\u1ecbnh c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh \u0111\u1ec3 n\u00e2ng cao n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng S\u1edf l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n

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

1. N\u1ed9i dung v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/strong><\/p>\n

1.1. N\u1ed9i dung nghi\u00ean c\u1ee9u<\/i><\/p>\n

– Kh\u1ea3o s\u00e1t x\u00e1c \u0111\u1ecbnh hi\u1ec7n tr\u1ea1ng r\u1eebng S\u1edf \u1edf c\u00e1c v\u00f9ng T\u00e2y B\u1eafc; \u0110\u00f4ng B\u1eafc; Trung t\u00e2m v\u00e0 B\u1eafc Trung b\u1ed9 Vi\u1ec7t Nam<\/p>\n

– Nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng S\u1edf n\u0103ng su\u1ea5t cao<\/p>\n

– Nghi\u00ean c\u1ee9u bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh cho v\u00f9ng T\u00e2y B\u1eafc, \u0110\u00f4ng B\u1eafc v\u00e0 B\u1eafc Trung b\u1ed9 (5 ha cho m\u1ed7i v\u00f9ng) v\u00e0 x\u00e2y d\u1ef1ng d\u1ef1 th\u1ea3o quy tr\u00ecnh k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh cho 3 v\u00f9ng.<\/p>\n

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

K\u1ebf th\u1eeba c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u00e0 c\u00e1c t\u00e0i li\u1ec7u \u0111\u00e3 c\u00f3 v\u1ec1 c\u00e2y S\u1edf. Tr\u00ean c\u01a1 s\u1edf \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng c\u00e1c r\u1eebng S\u1edf \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng, l\u1ef1a ch\u1ecdn c\u00e1c r\u1eebng S\u1edf cho n\u0103ng su\u1ea5t qu\u1ea3 cao \u0111\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n. C\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u01b0\u1ee3c theo d\u00f5i li\u00ean t\u1ee5c trong 3 n\u0103m \u0111\u1ec3 t\u1eeb \u0111\u00f3 ch\u1ecdn ra c\u00e1c c\u00e2y tr\u1ed9i cho n\u0103ng su\u1ea5t h\u1ea1t v\u00e0 s\u1ea3n l\u01b0\u1ee3ng d\u1ea7u cao, \u0111\u1ed3ng th\u1eddi ti\u1ebfn h\u00e0nh thu th\u1eadp h\u1ea1t t\u1eeb c\u00e1c c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u0111\u1ec3 nh\u00e2n gi\u1ed1ng v\u00e0 b\u1ed1 tr\u00ed c\u00e1c th\u00ed nghi\u1ec7m tr\u1ed3ng r\u1eebng th\u00e2m canh cho 3 v\u00f9ng \u0110\u00f4ng B\u1eafc, T\u00e2y B\u1eafc v\u00e0 B\u1eafc trung b\u1ed9 th\u00f4ng qua c\u00e1c bi\u1ec7n ph\u00e1p b\u00f3n ph\u00e2n, l\u00e0m \u0111\u1ea5t, tr\u1ed3ng xen. C\u00e1c th\u00ed nghi\u1ec7m tr\u1ed3ng r\u1eebng th\u00e2m canh \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo kh\u1ed1i \u0111\u1ea7y \u0111\u1ee7 ng\u1eabu nhi\u00ean v\u00e0 l\u1eb7p l\u1ea1i 3 l\u1ea7n t\u1ea1i c\u1ea3 3 \u0111\u1ecba \u0111i\u1ec3m thu\u1ed9c 3 v\u00f9ng \u0110\u00f4ng B\u1eafc, T\u00e2y B\u1eafc v\u00e0 B\u1eafc Trung B\u1ed9. Bao g\u1ed3m c\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 b\u00f3n ph\u00e2n, l\u00e0m \u0111\u1ea5t, tr\u1ed3ng ca\u00e2 k\u1ebft h\u1ee3p v\u00e0 ph\u1ee5c h\u1ed3i ph\u1ee5c tr\u00e1ng r\u1eebng S\u1edf gi\u00e0 c\u1ed7i.<\/p>\n

S\u1ed1 li\u1ec7u c\u1ee7a c\u00e1c th\u00ed nghi\u1ec7m tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh \u0111\u01b0\u1ee3c thu th\u1eadp tr\u00ean c\u00e1c \u00f4 ti\u00eau chu\u1ea9n \u0111\u1ecbnh v\u1ecb c\u00f3 di\u1ec7n t\u00edch l\u00e0 500m2<\/sup>\/l\u1eb7p\/c\u00f4ng th\u1ee9c (Dung l\u01b0\u1ee3ng m\u1eabu trong m\u1ed7i l\u1ea7n l\u1eb7p c\u1ee7a m\u1ed7i c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m t\u1eeb 35-40 c\u00e2y). S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n Levene \u0111\u1ec3 ki\u1ec3m tra s\u1ef1 b\u1eb1ng nhau v\u1ec1 ph\u01b0\u01a1ng sai c\u1ee7a c\u00e1c m\u1eabu trong c\u00e1c CTTN tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh. \u00c1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai m\u1ed9t nh\u00e2n t\u1ed1 th\u00f4ng qua ki\u1ec3m tra \u0111a bi\u1ebfn \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 th\u00ed nghi\u1ec7m th\u00e2m canh. S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n Duncan \u0111\u1ec3 t\u00ecm ra c\u00f4ng th\u1ee9c t\u1ed1t nh\u1ea5t.<\/p>\n

2. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u00e0 th\u1ea3o lu\u1eadn<\/strong><\/p>\n

2<\/i>.1. Kh\u1ea3o s\u00e1t x\u00e1c \u0111\u1ecbnh hi\u1ec7n tr\u1ea1ng r\u1eebng <\/i>S<\/i>\u1edf \u1edf c\u00e1c v\u00f9ng T\u00e2y B\u1eafc<\/i>,<\/i> \u0110\u00f4ng B\u1eafc<\/i>,<\/i> Trung t\u00e2m v\u00e0 B\u1eafc Trung B\u1ed9 Vi\u1ec7t Nam<\/i><\/i><\/p>\n

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra cho th\u1ea5y, t\u1ed5ng di\u1ec7n t\u00edch S\u1edf tr\u1ed3ng \u1edf c\u00e1c t\u1ec9nh mi\u1ec1n B\u1eafc \u0111\u1ebfn cu\u1ed1i n\u0103m 2006 l\u00e0 6262,3ha, trong \u0111\u00f3 Ngh\u1ec7 An l\u00e0 t\u1ec9nh c\u00f2n di\u1ec7n t\u00edch tr\u1ed3ng S\u1edf l\u1edbn nh\u1ea5t, hi\u1ec7n c\u00f2n \u1edf c\u00e1c huy\u1ec7n Ngh\u0129a \u0110\u00e0n, K\u1ef3 S\u01a1n, T\u00e2n K\u1ef3, Y\u00ean Th\u00e0nh, Qu\u1ef3 H\u1ee3p, Qu\u1ef3 Ch\u00e2u, \u2026 v\u1edbi t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng S\u1edf c\u1ee7a to\u00e0n t\u1ec9nh l\u00e0 5613,4ha, trong \u0111\u00f3 hi\u1ec7n c\u00f2n t\u1eadp trung nhi\u1ec1u nh\u1ea5t l\u00e0 \u1edf S\u00f4ng Hi\u1ebfu v\u1edbi t\u1ed5ng di\u1ec7n t\u00edch l\u00e0 1333,3ha. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra c\u0169ng cho th\u1ea5y, hi\u1ec7n nay c\u00e1c gi\u1ed1ng S\u1edf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u1ed3ng \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng g\u1ed3m c\u00f3 S\u1edf qu\u00fdt, S\u1edf cam, S\u1edf l\u00ea, S\u1edf ch\u00e8 v\u00e0 S\u1edf c\u00e0nh m\u1ec1m Trung Qu\u1ed1c. S\u1edf ch\u00e8 \u0111\u01b0\u1ee3c tr\u1ed3ng nhi\u1ec1u nh\u1ea5t \u1edf Ngh\u1ec7 An, S\u1edf cam, S\u1edf qu\u00fdt v\u00e0 S\u1edf l\u00ea \u0111\u01b0\u1ee3c tr\u1ed3ng nhi\u1ec1u \u1edf c\u00e1c t\u1ec9nh L\u1ea1ng S\u01a1n, Qu\u1ea3ng Ninh, Ph\u00fa Th\u1ecd, Y\u00ean B\u00e1i, H\u00e0 Giang. C\u00f2n S\u1edf c\u00e0nh m\u1ec1m Trung Qu\u1ed1c m\u1edbi \u0111\u01b0\u1ee3c tr\u1ed3ng th\u1eed nghi\u1ec7m \u1edf 6 \u0111i\u1ec3m l\u00e0 x\u00e3 H\u1ea3i Y\u1ebfn huy\u1ec7n Cao L\u1ed9c (L\u1ea1ng S\u01a1n), x\u00e3 V\u00e2n S\u01a1n, huy\u1ec7n \u0110oan H\u00f9ng (Ph\u00fa Th\u1ecd), x\u00e3 V\u0129nh \u0110\u1ed3ng, huy\u1ec7n Kim B\u00f4i (Ho\u00e0 B\u00ecnh), L\u00e0ng M\u00f4, huy\u1ec7n S\u00ecn H\u1ed3 (Lai Ch\u00e2u), x\u00e3 \u0110\u1ea1i L\u1ed9c, huy\u1ec7n H\u1eadu L\u1ed9c (Thanh Ho\u00e1) v\u00e0 x\u00e3 Ngh\u0129a L\u1ed9c, huy\u1ec7n Ngh\u0129a \u0110\u00e0n (Ngh\u1ec7 An). H\u1ea7u h\u1ebft c\u00e1c gi\u1ed1ng S\u1edf \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u1ec1u ch\u01b0a \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc. Nh\u00ecn chung \u1edf h\u1ea7u h\u1ebft c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u1ec1u tr\u1ed3ng S\u1edf v\u1edbi m\u1eadt \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i cao, t\u1eeb 1100 c\u00e2y\/ha (\u1edf Ph\u00fa Th\u1ecd) \u0111\u1ebfn 4900 c\u00e2y\/ha (\u1edf H\u00e0 Giang). R\u1eebng S\u1edf tr\u1ed3ng thu\u1ea7n lo\u00e0i th\u01b0\u1eddng c\u00f3 m\u1eadt \u0111\u1ed9 l\u1edbn tr\u00ean 2000 c\u00e2y\/ha, \u0111\u1ed1i v\u1edbi r\u1eebng S\u1edf tr\u1ed3ng h\u1ed7n giao th\u00ec m\u1eadt \u0111\u1ed9 c\u1ee7a S\u1edf th\u01b0\u1eddng 200-300 c\u00e2y\/ha. Nh\u1eefng \u0111\u1ecba ph\u01b0\u01a1ng tr\u1ed3ng v\u1edbi m\u1eadt \u0111\u1ed9 cao ch\u1ee7 y\u1ebfu l\u00e0 \u0111\u1ec3 ph\u1ee7 xanh \u0111\u1ea5t tr\u1ed1ng, \u0111\u1ed3i tr\u1ecdc c\u00f2n m\u1ee5c ti\u00eau l\u1ea5y qu\u1ea3, h\u1ea1t ch\u1ec9 l\u00e0 ph\u1ee5 (\u0111i\u1ec3n h\u00ecnh nh\u01b0 \u1edf H\u00e0 Giang). Tuy nhi\u00ean S\u1edf l\u00e0 c\u00e2y tr\u1ed3ng v\u1edbi m\u1ee5c ti\u00eau ch\u00ednh l\u00e0 l\u1ea5y h\u1ea1t \u00e9p d\u1ea7u v\u00ec v\u1eady vi\u1ec7c tr\u1ed3ng S\u1edf v\u1edbi m\u1eadt \u0111\u1ed9 cao l\u00e0m cho s\u1ea3n l\u01b0\u1ee3ng r\u1eebng S\u1edf \u0111\u1ea1t r\u1ea5t th\u1ea5p, th\u1eadm ch\u00ed nhi\u1ec1u n\u01a1i c\u00e2y kh\u00f4ng c\u00f3 qu\u1ea3. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra v\u1ec1 n\u0103ng su\u1ea5t qu\u1ea3 S\u1edf \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y nh\u01b0 trong b\u1ea3ng 1.<\/p>\n

B\u1ea3ng 1: N\u0103ng su\u1ea5t S\u1edf \u1edf c\u00e1c t\u1ec9nh \u0111i\u1ec1u tra<\/p>\n\n\n\n\n\n\n\n\n\n\n
\n

\u0110\u1ecba \u0111i\u1ec3m<\/p>\n

 <\/td>\n

\n

Lo\u00e0i S\u1edf<\/p>\n<\/td>\n

\n

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

\n

T\u1ef7 l\u1ec7 h\u1ea1t\/qu\u1ea3 t\u01b0\u01a1i (%)<\/p>\n<\/td>\n

\n

N\u0103ng su\u1ea5t\/ha<\/p>\n<\/td>\n<\/tr>\n

\n

Qu\u1ea3 t\u01b0\u01a1i (t\u1ea5n)<\/p>\n<\/td>\n

\n

H\u1ea1t t\u01b0\u01a1i<\/p>\n

(t\u1ea5n)<\/p>\n<\/td>\n<\/tr>\n

Qu\u1ea3ng Ninh<\/td>\nS\u1edf cam<\/td>\n\n

36<\/p>\n<\/td>\n

\n

31.50<\/p>\n<\/td>\n

\n

5,39<\/p>\n<\/td>\n

\n

1,7<\/p>\n<\/td>\n<\/tr>\n

L\u1ea1ng S\u01a1n<\/td>\nS\u1edf qu\u00fdt<\/td>\n\n

31<\/p>\n<\/td>\n

\n

32,25<\/p>\n<\/td>\n

\n

5,58<\/p>\n<\/td>\n

\n

1,8<\/p>\n<\/td>\n<\/tr>\n

H\u00e0 Giang<\/td>\nS\u1edf l\u1ef1u<\/td>\n\n

36<\/p>\n<\/td>\n

\n

31,5<\/p>\n<\/td>\n

\n

6,67<\/p>\n<\/td>\n

\n

2,1<\/p>\n<\/td>\n<\/tr>\n

S\u1edf ch\u00e8<\/td>\n\n

36<\/p>\n<\/td>\n

\n

51.4<\/p>\n<\/td>\n

\n

2,92<\/p>\n<\/td>\n

\n

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

Thanh Ho\u00e1<\/td>\nS\u1edf l\u00ea<\/td>\n\n

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

\n

46,1<\/p>\n<\/td>\n

\n

4,38<\/p>\n<\/td>\n

\n

2,0<\/p>\n<\/td>\n<\/tr>\n

Ngh\u1ec7 An<\/td>\nS\u1edf ch\u00e8<\/td>\n\n

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

\n

65,6<\/p>\n<\/td>\n

\n

4,45<\/p>\n<\/td>\n

\n

\u00a0 2,9<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

2<\/i>.<\/i>2<\/i>. <\/i>K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng S\u1edf n\u0103ng su\u1ea5t cao<\/i><\/i><\/p>\n

2.2.1. K\u1ebft qu\u1ea3 ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i<\/p>\n

C\u0103n c\u1ee9 v\u00e0o m\u1ee9c \u0111\u1ed9 v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 s\u1ea3n l\u01b0\u1ee3ng h\u1ea1t so v\u1edbi trung b\u00ecnh qu\u1ea7n th\u1ec3, t\u00ecnh h\u00ecnh sinh tr\u01b0\u1edfng v\u00e0 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m v\u1ec1 qu\u1ea3 v\u00e0 h\u1ea1t c\u1ee7a c\u00e2y m\u1eb9, n\u0103m 2006 \u0111\u1ec1 t\u00e0i \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 60 c\u00e2y tr\u1ed9i d\u1ef1 tuy\u1ec3n \u1edf c\u00e1c t\u1ec9nh Ngh\u1ec7 An, Ph\u00fa Th\u1ecd v\u00e0 Qu\u1ea3ng Ninh. C\u0103n c\u1ee9 v\u00e0o s\u1ea3n l\u01b0\u1ee3ng h\u1ea1t v\u00e0 h\u00e0m l\u01b0\u1ee3ng d\u1ea7u, trong 2 n\u0103m ti\u1ebfp theo l\u00e0 2007 v\u00e0 2008 \u0111\u00e3 ch\u1ecdn ra \u0111\u01b0\u1ee3c 12 c\u00e2y tr\u1ed9i cho n\u0103ng su\u1ea5t h\u1ea1t v\u00e0 h\u00e0m l\u01b0\u1ee3ng d\u1ea7u cao nh\u1ea5t, \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau c\u1ee7a \u0111\u1ec1 t\u00e0i. Trong \u0111\u00f3 \u1edf Ngh\u0129a \u0110\u00e0n ch\u1ecdn \u0111\u01b0\u1ee3c 5 c\u00e2y, Tam N\u00f4ng ch\u1ecdn \u0111\u01b0\u1ee3c 4 c\u00e2y v\u00e0 \u1edf Ti\u00ean Y\u00ean ch\u1ecdn \u0111\u01b0\u1ee3c 3 c\u00e2y. S\u1ed1 li\u1ec7u v\u1ec1 n\u0103ng su\u1ea5t qu\u1ea3 v\u00e0 s\u1ea3n l\u01b0\u1ee3ng d\u1ea7u c\u1ee7a 12 c\u00e2y tr\u1ed9i \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y nh\u01b0 trong b\u1ea3ng 2.<\/p>\n

B\u1ea3ng 2: N\u0103ng su\u1ea5t qu\u1ea3 v\u00e0 s\u1ea3n l\u01b0\u1ee3ng d\u1ea7u b\u00ecnh qu\u00e2n trong 3 n\u0103m theo d\u00f5i c\u1ee7a 12 c\u00e2y tr\u1ed9i<\/p>\n

(H\u00e0m l\u01b0\u1ee3ng d\u1ea7u \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch t\u1ea1i Ph\u00f2ng h\u00f3a d\u1ea7u – Vi\u1ec7n C\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m HN)<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

\u0110\u1ecba \u0111i\u1ec3m ch\u1ecdn c\u00e2y tr\u1ed9i<\/p>\n<\/td>\n

\n

K\u00fd hi\u1ec7u c\u00e2y tr\u1ed9i<\/p>\n<\/td>\n

\n

Tr\u1ecdng l\u01b0\u1ee3ng h\u1ea1t<\/p>\n

(kg \/c\u00e2y)<\/p>\n<\/td>\n

\n

\u0110\u1ed9 v\u01b0\u1ee3t v\u1ec1 n\u0103ng su\u1ea5t h\u1ea1t so v\u1edbi TBQT<\/p>\n

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

\n

H\u00e0m l\u01b0\u1ee3ng d\u1ea7u (%)<\/p>\n<\/td>\n

\n

S\u1ea3n l\u01b0\u1ee3ng d\u1ea7u<\/p>\n

(kg\/c)<\/p>\n<\/td>\n

\n

\u0110\u1ed9 v\u01b0\u1ee3t v\u1ec1 s\u1ea3n l\u01b0\u1ee3ng d\u1ea7u so v\u1edbi TBQT (%)<\/p>\n<\/td>\n<\/tr>\n

\n

Ti\u00ean Y\u00ean – Qu\u1ea3ng Ninh<\/p>\n<\/td>\n

\n

QN2<\/p>\n<\/td>\n

\n

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

\n

183,4<\/b><\/p>\n<\/td>\n

\n

44,2<\/p>\n<\/td>\n

\n

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

\n

206,3<\/p>\n<\/td>\n<\/tr>\n

\n

QN6<\/p>\n<\/td>\n

\n

7,5<\/b><\/p>\n<\/td>\n

\n

174,8<\/p>\n<\/td>\n

\n

45,2<\/p>\n<\/td>\n

\n

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

\n

212,0<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

QN14<\/p>\n<\/td>\n

\n

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

\n

114,0<\/p>\n<\/td>\n

\n

50,4<\/p>\n<\/td>\n

\n

1,4<\/b><\/p>\n<\/td>\n

\n

185,8<\/p>\n<\/td>\n<\/tr>\n

\n

TBQT<\/i><\/b><\/p>\n<\/td>\n

\n

2,7<\/p>\n<\/td>\n

<\/td>\n\n

39,6<\/i><\/b><\/p>\n<\/td>\n

\n

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

<\/td>\n<\/tr>\n
\n

Tam N\u00f4ng – Ph\u00fa Th\u1ecd<\/p>\n<\/td>\n

\n

PT3<\/p>\n<\/td>\n

\n

6,3<\/p>\n<\/td>\n

\n

115,5<\/p>\n<\/td>\n

\n

49,9<\/p>\n<\/td>\n

\n

1,7<\/p>\n<\/td>\n

\n

210,3<\/p>\n<\/td>\n<\/tr>\n

\n

PT4<\/p>\n<\/td>\n

\n

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

\n

126,2<\/p>\n<\/td>\n

\n

49,8<\/p>\n<\/td>\n

\n

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

\n

186,9<\/p>\n<\/td>\n<\/tr>\n

\n

PT8<\/p>\n<\/td>\n

\n

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

\n

141,3<\/p>\n<\/td>\n

\n

48,3<\/p>\n<\/td>\n

\n

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

\n

189,6<\/p>\n<\/td>\n<\/tr>\n

\n

PT18<\/p>\n<\/td>\n

\n

7,3<\/b><\/p>\n<\/td>\n

\n

166,3<\/b><\/p>\n<\/td>\n

\n

48,4<\/p>\n<\/td>\n

\n

1,7<\/p>\n<\/td>\n

\n

231,7<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

TBQT<\/i><\/b><\/p>\n<\/td>\n

\n

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

<\/td>\n\n

42,8<\/i><\/b><\/p>\n<\/td>\n

\n

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

<\/td>\n<\/tr>\n
\n

Ngh\u0129a \u0110\u00e0n – Ngh\u1ec7 An<\/p>\n<\/td>\n

\n

NA1<\/p>\n<\/td>\n

\n

18,2<\/b><\/p>\n<\/td>\n

\n

138,5<\/b><\/p>\n<\/td>\n

\n

52,1<\/p>\n<\/td>\n

\n

5,9<\/b><\/p>\n<\/td>\n

\n

220,9<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

NA6<\/p>\n<\/td>\n

\n

12,9<\/p>\n<\/td>\n

\n

72,7<\/p>\n<\/td>\n

\n

49,1<\/p>\n<\/td>\n

\n

3,5<\/p>\n<\/td>\n

\n

96,2<\/p>\n<\/td>\n<\/tr>\n

\n

NA8N<\/p>\n<\/td>\n

\n

12,8<\/p>\n<\/td>\n

\n

87,4<\/p>\n<\/td>\n

\n

51,3<\/p>\n<\/td>\n

\n

3,8<\/p>\n<\/td>\n

\n

139,4<\/p>\n<\/td>\n<\/tr>\n

\n

NA13<\/p>\n<\/td>\n

\n

11,3<\/p>\n<\/td>\n

\n

63,5<\/p>\n<\/td>\n

\n

52,3<\/p>\n<\/td>\n

\n

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

\n

106,9<\/p>\n<\/td>\n<\/tr>\n

\n

NA15<\/p>\n<\/td>\n

\n

11,8<\/p>\n<\/td>\n

\n

56,2<\/p>\n<\/td>\n

\n

49,6<\/p>\n<\/td>\n

\n

3,5<\/p>\n<\/td>\n

\n

86,1<\/p>\n<\/td>\n<\/tr>\n

\n

TBQT<\/i><\/b><\/p>\n<\/td>\n

\n

7,3<\/p>\n<\/td>\n

<\/td>\n\n

42,4<\/i><\/b><\/p>\n<\/td>\n

\n

1,8<\/i><\/b><\/p>\n<\/td>\n

<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

2.2.2. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng S\u1edf<\/p>\n

\u00a0\u00a0\u00a0\u00a0 a). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt gi\u00e2m hom:<\/i><\/p>\n

Th\u00ed nghi\u1ec7m nghi\u00ean c\u1ee9u th\u0103m d\u00f2 c\u00e1c lo\u1ea1i thu\u1ed1c k\u00edch th\u00edch s\u1ef1 ra r\u1ec5 c\u1ee7a hom S\u1edf \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c lo\u1ea1i hormon NAA d\u1ea1ng b\u1ed9t l\u00e0 c\u00f3 tri\u1ec3n v\u1ecdng nh\u1ea5t. T\u1eeb c\u00e1c k\u1ebft qu\u1ea3 n\u00e0y \u0111\u1ec1 t\u00e0i \u0111\u00e3 s\u1eed d\u1ee5ng lo\u1ea1i hormon NAA d\u1ea1ng b\u1ed9t \u0111\u1ec3 nghi\u00ean c\u1ee9u cho c\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 gi\u00e2m hom S\u1edf ti\u1ebfp theo. \u0110\u1ec3 ch\u1ecdn ra lo\u1ea1i n\u1ed3ng \u0111\u1ed9 th\u00edch h\u1ee3p nh\u1ea5t \u0111\u1ec1 t\u00e0i \u0111\u00e3 b\u1ed1 tr\u00ed c\u00e1c th\u00ed nghi\u1ec7m gi\u00e2m hom S\u1edf v\u1edbi 8 lo\u1ea1i n\u1ed3ng \u0111\u1ed9 kh\u00e1c nhau, t\u1eeb 0,05-2,0%. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c lo\u1ea1i n\u1ed3ng \u0111\u1ed9 thu\u1ed1c b\u1ed9t NAA \u0111\u1ebfn s\u1ef1 ra r\u1ec5 c\u1ee7a hom S\u1edf cho th\u1ea5y, c\u00f4ng th\u1ee9c s\u1eed d\u1ee5ng thu\u1ed1c NAA v\u1edbi n\u1ed3ng \u0111\u1ed9 0,1% cho t\u1ef7 l\u1ec7 hom S\u1edf ra r\u1ec5 l\u00e0 cao nh\u1ea5t \u0111\u1ea1t 72,3%. Ngo\u00e0i ra ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a hom S\u1edf trong c\u00f4ng th\u1ee9c n\u00e0y c\u0169ng \u0111\u1ea1t k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t. S\u1ed1 r\u1ec5 trung b\u00ecnh tr\u00ean m\u1ed7i hom \u0111\u1ea1t 7,3 r\u1ec5 v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 trung b\u00ecnh c\u1ee7a m\u1ed7i hom \u0111\u1ea1t 7,0 cm. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 m\u00f9a v\u1ee5 gi\u00e2m hom c\u0169ng cho th\u1ea5y, gi\u00e2m hom S\u1edf v\u00e0o th\u00e1ng 8 cho t\u1ef7 l\u1ec7 hom ra r\u1ec5 cao nh\u1ea5t (72,4%) v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng hom c\u0169ng t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t. S\u1ed1 r\u1ec5 trung b\u00ecnh tr\u00ean m\u1ed7i hom l\u00e0 7,3 r\u1ec5 v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 trung b\u00ecnh l\u00e0 7,0cm.<\/p>\n

b). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt gh\u00e9p c\u00e2y m\u1ea7m<\/i><\/p>\n

Th\u00ed nghi\u1ec7m nghi\u00ean c\u1ee9u ch\u1ecdn ra v\u1eadt li\u1ec7u k\u1ebft n\u1ed1i gi\u1eefa g\u1ed1c gh\u00e9p v\u00e0 ch\u1ed3i gh\u00e9p lo\u00e0i c\u00e2y S\u1edf cho th\u1ea5y trong c\u00e1c v\u1eadt li\u1ec7u l\u00e0 nilong, b\u0103ng paraphin v\u00e0 gi\u1ea5y nh\u00f4m m\u1ecfng th\u00ec gh\u00e9p c\u00e2y m\u1ea7m b\u1eb1ng gi\u1ea5y nh\u00f4m m\u1ecfng cho t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y m\u1ea7m l\u00e0 cao nh\u1ea5t, \u0111\u1ea1t 80,0% v\u00e0 v\u1eadt li\u1ec7u gh\u00e9p l\u00e0 b\u0103ng paraphin cho t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y m\u1ea7m l\u00e0 th\u1ea5p nh\u1ea5t, \u0111\u1ea1t 5,0%. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a tu\u1ed5i g\u1ed1c gh\u00e9p \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y S\u1edf gh\u00e9p (sau 3 th\u00e1ng) v\u1edbi v\u1eadt li\u1ec7u k\u1ebft n\u1ed1i l\u00e0 g\u1ea5y nh\u00f4m m\u1ecfng cho th\u1ea5y trong c\u00e1c lo\u1ea1i tu\u1ed5i g\u1ed1c gh\u00e9p th\u00ec gh\u00e9p tr\u00ean g\u1ed1c c\u00e2y m\u1ea7m 30 ng\u00e0y tu\u1ed5i cho t\u1ef7 l\u1ec7 s\u1ed1ng cao nh\u1ea5t, \u0111\u1ea1t 80,0%, trong khi \u0111\u00f3 gh\u00e9p c\u00e2y m\u1ea7m tr\u00ean g\u1ed1c gh\u00e9p 110 ng\u00e0y tu\u1ed5i ch\u1ec9 \u0111\u1ea1t t\u1ef7 l\u1ec7 s\u1ed1ng l\u00e0 47,6%. K\u1ebft qu\u1ea3 c\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 m\u00f9a v\u1ee5 gh\u00e9p c\u00e2y m\u1ea7m c\u0169ng cho th\u1ea5y, t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y gh\u00e9p trong kho\u1ea3ng t\u1eeb th\u00e1ng 3 – 4 (v\u1ee5 xu\u00e2n h\u00e8) \u0111\u1ec1u cao h\u01a1n so v\u1edbi t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e2y gh\u00e9p trong giai \u0111o\u1ea1n t\u1eeb th\u00e1ng 6 – 10 (v\u1ee5 h\u00e8 thu).<\/p>\n

c). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt chi\u1ebft c\u00e0nh<\/i><\/p>\n

K\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m v\u1ec1 bi\u1ec7n ph\u00e1p chi\u1ebft c\u00e0nh cho 2 lo\u00e0i S\u1edf kh\u00e1c nhau b\u1eb1ng hai lo\u1ea1i thu\u1ed1c k\u00edch th\u00edch l\u00e0 NAA 0,1% v\u00e0 IBA 0,5% \u0111\u01b0\u1ee3c tr\u1ed9n v\u1edbi h\u1ed7n h\u1ee3p b\u00f9n v\u00e0 r\u01a1m m\u1ee5c cho th\u1ea5y, sau 65-70 ng\u00e0y, c\u00e0nh chi\u1ebft c\u1ee7a c\u00e1c lo\u00e0i S\u1edf m\u1edbi b\u1eaft \u0111\u1ea7u ra r\u1ec5 v\u00e0 sau kho\u1ea3ng 3,5 th\u00e1ng r\u1ec5 S\u1edf m\u1edbi ra nhi\u1ec1u v\u00e0 ph\u1ea3i sau 6 -7 th\u00e1ng k\u1ec3 t\u1eeb khi chi\u1ebft m\u1edbi c\u00f3 th\u1ec3 c\u1eaft c\u00e0nh chi\u1ebft mang \u0111i tr\u1ed3ng. T\u1ef7 l\u1ec7 s\u1ed1 c\u00e0nh chi\u1ebft c\u1ee7a c\u00e1c lo\u00e0i S\u1edf ra r\u1ec5 nh\u00ecn chung \u0111\u1ec1u \u0111\u1ea1t r\u1ea5t th\u1ea5p, ch\u1ec9 \u0111\u1ea1t t\u1eeb 22,7- 41,5%. T\u1ef7 l\u1ec7 c\u00e0nh ra r\u1ec5 c\u1ee7a S\u1edf l\u1ef1u \u1edf Qu\u1ea3ng Ninh cao h\u01a1n so v\u1edbi S\u1edf ch\u00e8 \u1edf Ngh\u1ec7 An. C\u00f4ng th\u1ee9c d\u00f9ng thu\u1ed1c k\u00edch th\u00edch IBA cho t\u1ef7 l\u1ec7 c\u00e0nh S\u1edf ra r\u1ec5 th\u1ea5p h\u01a1n so v\u1edbi d\u00f9ng thu\u1ed1c k\u00edch th\u00edch NAA \u0111\u1ed1i v\u1edbi c\u1ea3 2 gi\u1ed1ng S\u1edf ch\u00e8 v\u00e0 S\u1edf l\u1ef1u.<\/p>\n

2.3. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh cho c\u00e1c v\u00f9ng T\u00e2y B\u1eafc, \u0110\u00f4ng B\u1eafc v\u00e0 B\u1eafc trung b\u1ed9.<\/i><\/i><\/p>\n

2.3.1. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n cho r\u1eebng S\u1edf:<\/p>\n

K\u1ebft qu\u1ea3 ki\u1ec3m tra t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf tr\u1ed3ng trong c\u00e1c th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n cho th\u1ea5y t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf tr\u1ed3ng trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n t\u1ea1i Ngh\u1ec7 An sau 30 th\u00e1ng tr\u1ed3ng \u0111\u1ea1t \u0111\u01b0\u1ee3c trung b\u00ecnh l\u00e0 91,5%, trong khi \u0111\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n t\u1ea1i Qu\u1ea3ng Ninh sau 28 th\u00e1ng tr\u1ed3ng \u0111\u1ea1t 90,8% v\u00e0 \u1edf S\u01a1n La sau 28 th\u00e1ng tr\u1ed3ng t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf trong c\u00e1c th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n \u0111\u1ea1t \u0111\u01b0\u1ee3c 85,4%.<\/p>\n

Sau 28-30 th\u00e1ng tr\u1ed3ng sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf trong c\u00e1c CTTN b\u00f3n ph\u00e2n \u1edf c\u1ea3 3 v\u00f9ng l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t. Trong t\u1eebng v\u00f9ng t\u0103ng tr\u01b0\u1edfng h\u1eb1ng n\u0103m c\u1ee7a S\u1edf trong c\u00e1c CTTN l\u00e0 r\u1ea5t kh\u00e1c nhau. T\u1ea1i Ngh\u1ec7 An t\u0103ng tr\u01b0\u1edfng h\u1eb1ng n\u0103m v\u1ec1 Do trong c\u00e1c CTTN b\u00f3n ph\u00e2n \u0111\u1ea1t t\u1eeb 0,3-0,7cm\/n\u0103m, v\u1ec1 Hvn \u0111\u1ea1t t\u1eeb 11-54cm\/n\u0103m v\u00e0 v\u1ec1 Dt \u0111\u1ea1t t\u1eeb 8-16cm\/n\u0103m. T\u0103ng tr\u01b0\u1edfng h\u1eb1ng n\u0103m c\u1ee7a S\u1edf trong c\u00e1c CTTN b\u00f3n ph\u00e2n t\u1ea1i Qu\u1ea3ng Ninh \u0111\u1ea1t t\u1eeb 0,2-0,5cm\/n\u0103m v\u1ec1 Do, t\u1eeb 10-40cm\/n\u0103m v\u1ec1 Hvn v\u00e0 t\u1eeb 7-17\/cm\/n\u0103m v\u1ec1 Dt trong khi \u0111\u00f3 t\u0103ng tr\u01b0\u1edfng h\u1eb1ng n\u0103m c\u1ee7a S\u1edf trong c\u00e1c CTTN b\u00f3n ph\u00e2n t\u1ea1i S\u01a1n La ch\u1ec9 \u0111\u1ea1t t\u1eeb 0,2-0,3cm\/n\u0103m v\u1ec1 Do, t\u1eeb 9-29cm\/n\u0103m v\u1ec1 Hvn v\u00e0 t\u1eeb 5-15\/cm\/n\u0103m v\u1ec1 Dt.<\/p>\n

K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai 1 nh\u00e2n t\u1ed1 th\u00f4ng qua ki\u1ec3m tra \u0111a bi\u1ebfn c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n \u1edf 3 v\u00f9ng cho th\u1ea5y sau 28 – 30 th\u00e1ng tr\u1ed3ng, v\u1edbi \u0111\u1ed9 tin c\u1eady l\u00e0 95% th\u00ec sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf tr\u1ed3ng \u1edf 3 v\u00f9ng \u0111\u00e3 c\u00f3 s\u1ef1 kh\u00e1c nhau gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m b\u00f3n ph\u00e2n. T\u1ea1i Qu\u1ea3ng Ninh v\u00e0 Ngh\u1ec7 An th\u00ec c\u00f4ng th\u1ee9c b\u00f3n 3kg ph\u00e2n chu\u1ed3ng hoai\/c\u00e2y cho sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf l\u00e0 t\u1ed1t nh\u1ea5t, trong khi \u0111\u00f3 t\u1ea1i S\u01a1n La th\u00ec c\u00f4ng th\u1ee9c b\u00f3n 1kg vi sinh\/c\u00e2y cho sinh tr\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao v\u00fat ng\u1ecdn c\u1ee7a S\u1edf l\u00e0 t\u1ed1t nh\u1ea5t.<\/p>\n

2.3.2. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e0m \u0111\u1ea5t tr\u1ed3ng S\u1edf:<\/p>\n

K\u1ebft qu\u1ea3 ki\u1ec3m tra v\u1ec1 t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf tr\u1ed3ng trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m l\u00e0m \u0111\u1ea5t v\u00e0 b\u00f3n ch\u1ea5t gi\u1eef \u1ea9m cho th\u1ea5y, nh\u00ecn chung t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m v\u1ec1 l\u00e0m \u0111\u1ea5t \u0111\u1ec1u \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u01b0\u01a1ng \u0111\u1ed1i cao, t\u1eeb 92,2 – 98,2%.<\/p>\n

K\u1ebft qu\u1ea3 ki\u1ec3m tra \u1ea3nh h\u01b0\u1edfng c\u1ee7a bi\u1ec7n ph\u00e1p l\u00e0m \u0111\u1ea5t \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf tr\u1ed3ng t\u1ea1i Ngh\u1ec7 An v\u00e0 S\u01a1n La b\u1eb1ng ti\u00eau chu\u1ea9n U c\u1ee7a Mann-Whitney cho th\u1ea5y, v\u1edbi \u0111\u1ed9 tin c\u00e2y l\u00e0 95% c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf tr\u1ed3ng trong c\u00e1c CTTN l\u00e0m \u0111\u1ea5t \u1edf Ngh\u1ec7 An v\u00e0 b\u00f3n ch\u1ea5t gi\u1eef \u1ea9m \u1edf S\u01a1n La \u0111\u1ec1u c\u00f3 s\u1ef1 kh\u00e1c nhau t\u01b0\u01a1ng \u0111\u1ed1i r\u00f5 r\u1ec7t v\u00ec \u0111\u1ec1u c\u00f3 x\u00e1c su\u1ea5t ki\u1ec3m tra c\u1ee7a U nh\u1ecf h\u01a1n 0,05 (Sig < 0,05). Nh\u01b0 v\u1eady, sau 28-30 th\u00e1ng tr\u1ed3ng sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf trong c\u00e1c th\u00ed nghi\u1ec7m l\u00e0m \u0111\u1ea5t \u0111\u00e3 c\u00f3 s\u1ef1 kh\u00e1c nhau gi\u1eefa c\u00e1c CTTN. C\u00e1c bi\u1ec7n ph\u00e1p c\u00e0y \u0111\u1ea5t to\u00e0n di\u1ec7n v\u00e0 b\u00f3n ch\u1ea5t gi\u1eef \u1ea9m cho \u0111\u1ea5t \u0111\u1ec1u cho sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c c\u00f4ng th\u1ee9c \u0111\u1ed1i ch\u1ee9ng.<\/p>\n

2.3.3. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m tr\u1ed3ng r\u1eebng S\u1edf c\u00f3 c\u00e2y k\u1ebft h\u1ee3p:<\/p>\n

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra v\u1ec1 t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf tr\u1ed3ng trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m tr\u1ed3ng xen cho th\u1ea5y, t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh c\u1ee7a S\u1edf sau 1 th\u00e1ng tr\u1ed3ng trong c\u00e1c th\u00ed nghi\u1ec7m tr\u1ed3ng xen \u1edf 3 n\u01a1i \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1eeb 93,4 – 97,3% v\u00e0 sau 28-30 h\u00e1ng \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1eeb 86,2 – 92,9%. Trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m tr\u1ed3ng xen th\u00ec c\u00f4ng th\u1ee9c tr\u1ed3ng xen S\u1edf v\u1edbi C\u1ed1t kh\u00ed \u1edf c\u1ea3 3 n\u01a1i \u0111\u1ec1u cho cho t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf l\u00e0 cao nh\u1ea5t, sau \u0111\u00f3 l\u00e0 \u0111\u1ebfn c\u00f4ng th\u1ee9c tr\u1ed3ng xen S\u1edf v\u1edbi S\u1eafn v\u00e0 t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a S\u1edf trong c\u00f4ng th\u1ee9c kh\u00f4ng tr\u1ed3ng xen (tr\u1ed3ng S\u1edf thu\u1ea7n lo\u00e0i) cho t\u1ef7 l\u1ec7 s\u1ed1ng th\u1ea5p nh\u1ea5t.<\/p>\n

Vi\u1ec7c tr\u1ed3ng S\u1eafn xen v\u1edbi S\u1edf sau 28-30 th\u00e1ng \u0111\u00e3 c\u00f3 t\u00e1c d\u1ee5ng h\u1ed7 tr\u1ee3 cho S\u1edf sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi C\u1ed1t kh\u00ed. Ngo\u00e0i vi\u1ec7c h\u1ed7 tr\u1ee3 che b\u00f3ng cho c\u00e2y S\u1edf trong giai \u0111o\u1ea1n \u0111\u1ea7u th\u00ec h\u1eb1ng n\u0103m trong c\u00e1c \u0111\u1ee3t ch\u0103m s\u00f3c cho S\u1eafn \u0111\u00e3 c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m cho \u0111\u1ea5t th\u00eam t\u01a1i x\u1ed1p h\u01a1n n\u1eefa S\u1edf c\u0169ng \u0111\u01b0\u1ee3c h\u01b0\u1edfng m\u1ed9t ph\u1ea7n ph\u00e2n b\u00f3n t\u1eeb vi\u1ec7c ch\u0103m s\u00f3c cho S\u1eafn. Do v\u1eady vi\u1ec7c tr\u1ed3ng xen S\u1edf v\u1edbi s\u1eafn \u0111\u00e3 c\u00f3 t\u00e1c d\u1ee5ng h\u1ed7 tr\u1ee3 cho c\u00e2y S\u1edf sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n. Tuy nhi\u00ean \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3 th\u00ec nh\u01b0 ph\u1ea7n tr\u00ean \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn, vi\u1ec7c tr\u1ed3ng xen S\u1eafn ph\u1ea3i \u0111\u1ea3m b\u1ea3o \u0111\u01b0\u1ee3c kho\u1ea3ng c\u00e1ch t\u1eeb h\u00e0ng S\u1eafn \u0111\u1ebfn h\u00e0ng S\u1edf t\u1eeb kho\u1ea3ng 1,0-1,2m \u0111\u1ec3 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 cho S\u1edf \u0111\u01b0\u1ee3c t\u1ed1t h\u01a1n. V\u00ec n\u1ebfu tr\u1ed3ng S\u1eafn qu\u00e1 g\u1ea7n v\u1edbi S\u1edf th\u00ec S\u1edf s\u1ebd b\u1ecb S\u1eafn c\u1ea1nh tranh v\u1ec1 kh\u00f4ng gian dinh d\u01b0\u1ee1ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 b\u1ecb c\u1ea1nh tranh v\u1ec1 \u00e1nh s\u00e1ng, khi \u0111\u00f3 c\u00e2y S\u1edf s\u1ebd kh\u00f4ng th\u1ec3 sinh tr\u01b0\u1edfng t\u1ed1t \u0111\u01b0\u1ee3c.<\/p>\n

2.3.4. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m b\u1ed5 sung k\u1ef9 thu\u1eadt ph\u1ee5c h\u1ed3i ph\u1ee5c tr\u00e1ng r\u1eebng S\u1edf:<\/p>\n

a) K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m gh\u00e9p \u0111\u1ed5i t\u00e1n:<\/i><\/p>\n

Sau 2 th\u00e1ng gh\u00e9p t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh c\u1ee7a 2 l\u1ea7n gh\u00e9p \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u00e0 62,8% v\u00e0 sau 4 n\u0103m gh\u00e9p th\u00ec t\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c ch\u1ed3i gh\u00e9p c\u00f2n l\u1ea1i l\u00e0 54,2%.<\/p>\n

Sau khi gh\u00e9p 1,5-2 th\u00e1ng c\u00e1c ch\u1ed3i gh\u00e9p li\u1ec1n v\u1ebft s\u1eb9o, \u0111\u00e2m ch\u1ed3i v\u00e0 b\u1eaft \u0111\u1ea7u sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n. Tuy nhi\u00ean ph\u1ea3i sau 9-10 th\u00e1ng th\u00ec c\u00e1c ch\u1ed3i gh\u00e9p m\u1edbi b\u1eaft \u0111\u1ea7u sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n m\u1ea1nh. Nh\u00ecn chung sinh tr\u01b0\u1edfng c\u1ee7a c\u00e1c ch\u1ed3i gh\u00e9p \u0111\u1ec1u t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t \u00a0trong 4 n\u0103m \u0111\u1ea7u k\u1ec3 t\u1eeb sau khi gh\u00e9p. C\u00e1c ch\u1ec9 ti\u00eau v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh c\u00e0nh, chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh t\u00e1n c\u1ee7a ch\u1ed3i gh\u00e9p \u0111\u1ec1u t\u0103ng m\u1ea1nh trong giai \u0111o\u1ea1n t\u1eeb th\u00e1ng th\u1ee9 30 tr\u1edf \u0111i.<\/p>\n

Qu\u00e1 tr\u00ecnh theo d\u00f5i cho th\u1ea5y sau 3 n\u0103m gh\u00e9p, c\u00e1c c\u00e0nh gh\u00e9p \u0111\u00e3 b\u1eaft \u0111\u1ea7u ra n\u1ee5 v\u00e0 \u0111\u1ebfn th\u00e1ng 12 n\u0103m 2009 n\u1ee5 c\u1ee7a c\u00e1c ch\u1ed3i gh\u00e9p \u0111\u00e3 n\u1edf hoa. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra \u0111\u1ebfn cu\u1ed5i tu\u1ed5i 3 cho th\u1ea5y c\u00f3 t\u1edbi 91,7% s\u1ed1 c\u00e0nh gh\u00e9p \u0111\u00e3 c\u00f3 n\u1ee5 v\u00e0 hoa, trong \u0111\u00f3 c\u00f3 86,0% s\u1ed1 c\u00e0nh gh\u00e9p \u0111\u00e3 \u0111\u1eadu qu\u1ea3. Nh\u01b0 v\u1eady c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng t\u1ef7 l\u1ec7 \u0111\u1eadu qu\u1ea3 c\u1ee7a c\u00e1c c\u00e0nh gh\u00e9p trong n\u0103m \u0111\u1ea7u ra b\u00f3i l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i cao.<\/p>\n

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra v\u1ec1 n\u0103ng su\u1ea5t qu\u1ea3 c\u1ee7a c\u00e1c c\u00e0nh gh\u00e9p t\u1ea1i tu\u1ed5i 4 c\u0169ng cho th\u1ea5y, s\u1ed1 qu\u1ea3 hi\u1ec7n c\u00f3 tr\u00ean c\u00e1c c\u00e0nh gh\u00e9p bi\u1ebfn \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn, th\u1ea5p nh\u1ea5t l\u00e0 c\u00f3 2 qu\u1ea3\/c\u00e0nh v\u00e0 cao nh\u1ea5t \u0111\u1ea1t t\u1edbi 94 qu\u1ea3\/c\u00e0nh, h\u1ec7 s\u1ed1 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 s\u1ed1 qu\u1ea3 tr\u00ean c\u00e0nh l\u00e0 101,3%. Trung b\u00ecnh \u0111\u1ea1t 25 qu\u1ea3\/c\u00e0nh.<\/p>\n

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

3<\/i>.1. K\u1ebft lu\u1eadn<\/i><\/i><\/p>\n

– \u0110\u1ebfn cu\u1ed1i n\u0103m 2006 di\u1ec7n t\u00edch r\u1eebng S\u1edf c\u00f2n l\u1ea1i \u1edf c\u00e1c t\u1ec9nh ph\u00eda B\u1eafc \u0111\u1ebfn B\u1eafc Trung B\u1ed9 l\u00e0 6262,3ha, trong \u0111\u00f3 ph\u1ea7n l\u1edbn l\u00e0 r\u1eebng S\u1edf tr\u1ed3ng thu\u1ea7n lo\u00e0i. Vi\u1ec7c g\u00e2y tr\u1ed3ng v\u00e0 ph\u00e1t tri\u1ec3n c\u00e2y S\u1edf ch\u1ee7 y\u1ebfu theo kinh nghi\u1ec7m nh\u00e2n d\u00e2n, ngu\u1ed3n gi\u1ed1ng ch\u01b0a \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc v\u00e0 ch\u01b0a c\u00f3 h\u1ec7 th\u1ed1ng c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt th\u00e2m canh.<\/p>\n

– \u0110\u1ec1 t\u00e0i \u0111\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 12 c\u00e2y tr\u1ed9i \u1edf 3 v\u00f9ng, trong \u0111\u00f3 \u1edf Ngh\u1ec7 An c\u00f3 5 c\u00e2y l\u00e0 NA1, NA6, NA8, NA13 v\u00e0 NA15, \u1edf Ph\u00fa Th\u1ecd c\u00f3 4 c\u00e2y tr\u1ed9i l\u00e0 PT3, PT4, PT8 v\u00e0 PT18, \u1edf Qu\u1ea3ng Ninh c\u00f3 3 c\u00e2y l\u00e0 QN2, QN6 v\u00e0 QN14. \u0110\u00e2y l\u00e0 c\u00e1c c\u00e2y tr\u1ed9i c\u00f3 n\u0103ng su\u1ea5t h\u1ea1t cao h\u01a1n t\u1eeb 20,4-256,6% v\u00e0 s\u1ea3n l\u01b0\u1ee3ng d\u1ea7u cao h\u01a1n t\u1eeb 15,45-325% so v\u1edbi trung b\u00ecnh qu\u1ea7n th\u1ec3.<\/p>\n

– Bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt gi\u00e2m hom v\u00e0 gh\u00e9p c\u00e2y m\u1ea7m S\u1edf \u0111\u1ec1u r\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng. Trong c\u00e1c lo\u1ea1i hormon \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u00ec hormon NAA v\u1edbi n\u1ed3ng \u0111\u1ed9 0,1% cho t\u1ef7 l\u1ec7 hom S\u1edf ra r\u1ec5 cao nh\u1ea5t (72,3%) v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng hom t\u1ed1t nh\u1ea5t. Gi\u00e2m hom S\u1edf v\u00e0o th\u00e1ng 8 cho t\u1ef7 l\u1ec7 hom ra r\u1ec5 cao nh\u1ea5t, \u0111\u1ea1t 83,4%.<\/p>\n

– T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh \u1edf Ngh\u1ec7 An, Qu\u1ea3ng Ninh v\u00e0 S\u01a1n La sau 28-30 th\u00e1ng h\u1ea7u h\u1ebft \u0111\u1ec1u \u0111\u1ea1t tr\u00ean 90%. Sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf trong c\u00e1c th\u00ed nghi\u1ec7m th\u00e2m canh \u1edf c\u1ea3 3 v\u00f9ng \u0111\u00e3 c\u00f3 s\u1ef1 kh\u00e1c nhau gi\u1eefa c\u00e1c CTTN. C\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m b\u00f3n l\u00f3t 3kg ph\u00e2n chu\u1ed1ng hoai\/c\u00e2y, c\u00e0y \u0111\u1ea5t to\u00e0n di\u1ec7n, tr\u1ed3ng xen S\u1edf v\u1edbi S\u1eafn \u0111\u1ec1u cho sinh tr\u01b0\u1edfng c\u1ee7a S\u1edf l\u00e0 t\u1ed1t nh\u1ea5t.<\/p>\n

– T\u1ef7 l\u1ec7 s\u1ed1ng c\u1ee7a c\u00e1c ch\u1ed3i gh\u00e9p trong m\u00f4 h\u00ecnh ph\u1ee5c tr\u00e1ng r\u1eebng S\u1edf gi\u00e0 c\u1ed7i \u1edf Ngh\u1ec7 An sau 4 n\u0103m \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u00e0 54,2%. C\u00e1c ch\u1ed3i gh\u00e9p \u0111\u1ec1u \u0111ang sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n t\u1ed1t. Sau 4 n\u0103m gh\u00e9p \u0111\u00e3 c\u00f3 86% s\u1ed1 c\u00e0nh gh\u00e9p \u0111\u1eadu qu\u1ea3. S\u1ed1 qu\u1ea3 trung b\u00ecnh tr\u00ean m\u1ed7i c\u00e0nh l\u00e0 25 qu\u1ea3.<\/p>\n

– \u0110\u1ec1 t\u00e0i \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c b\u1ea3n d\u1ef1 th\u1ea3o quy tr\u00ecnh k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh cho 3 v\u00f9ng nghi\u00ean c\u1ee9u l\u00e0 \u0110\u00f4ng B\u1eafc, T\u00e2y B\u1eafc v\u00e0 B\u1eafc Trung B\u1ed9.<\/p>\n

3<\/i>.<\/i>2<\/i>. Ki\u1ebfn ngh\u1ecb:<\/i><\/i><\/p>\n

– K\u00ednh \u0111\u1ec1 ngh\u1ecb B\u1ed9 NN&PTNT cho qu\u1ea3n l\u00fd, b\u1ea3o v\u1ec7 12 c\u00e2y tr\u1ed9i \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc \u1edf 3 v\u00f9ng, \u0111\u1ed3ng th\u1eddi ti\u1ebfp t\u1ee5c cho theo d\u00f5i c\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 tr\u1ed3ng r\u1eebng th\u00e2m canh v\u00e0 kh\u1ea3o nghi\u1ec7m gi\u1ed1ng S\u1edf \u1edf c\u1ea3 3 v\u00f9ng \u0111\u1ec3 c\u00f3 k\u1ebft lu\u1eadn ch\u00ednh x\u00e1c v\u1ec1 c\u00e1c k\u1ebft qu\u1ea3 c\u1ee7a th\u00ed nghi\u1ec7m.<\/p>\n

– Song song v\u1edbi vi\u1ec7c theo d\u00f5i ti\u1ebfp c\u00e1c th\u00ed nghi\u1ec7m c\u1ee7a \u0111\u1ec1 t\u00e0i, c\u1ea7n c\u00f3 nghi\u00ean c\u1ee9u \u0111\u1ec3 ph\u00e2n lo\u1ea1i v\u00e0 gi\u00e1m \u0111\u1ecbnh cho c\u00e1c gi\u1ed1ng S\u1edf hi\u1ec7n c\u00f3 \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng. L\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c cung c\u1ea5p gi\u1ed1ng sau n\u00e0y.<\/p>\n

– Tr\u00ean c\u01a1 s\u1edf b\u1ea3n d\u1ef1 th\u1ea3o quy tr\u00ecnh k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh cho 3 v\u00f9ng \u0110\u00f4ng B\u1eafc, T\u00e2y B\u1eafc v\u00e0 B\u1eafc trung b\u1ed9 m\u00e0 \u0111\u1ec1 t\u00e0i \u0111\u00e3 th\u1ef1c hi\u1ec7n, k\u00ednh \u0111\u1ec1 ngh\u1ecb B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n N\u00f4ng th\u00f4n ti\u1ebfp t\u1ee5c cho nghi\u00ean c\u1ee9u, ho\u00e0n thi\u1ec7n \u0111\u1ec3 x\u00e2y d\u1ef1ng th\u00e0nh quy tr\u00ecnh k\u1ef9 th\u1eadt tr\u1ed3ng r\u1eebng S\u1edf th\u00e2m canh cho 3 v\u00f9ng \u0110\u00f4ng B\u1eafc, T\u00e2y B\u1eafc v\u00e0 B\u1eafc trung b\u1ed9.<\/p>\n

– K\u00ednh \u0111\u1ec1 ngh\u1ecb B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n N\u00f4ng th\u00f4n cho l\u00e0m th\u1ee7 t\u1ee5c c\u00f4ng nh\u1eadn gi\u1ed1ng t\u1ea1m th\u1eddi cho 12 c\u00e2y tr\u1ed9i \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc \u1edf 3 v\u00f9ng.<\/p>\n

 <\/p>\n

T\u00c0I LI\u1ec6U THAM KH\u1ea2O<\/b><\/b><\/p>\n

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

    \n
  1. \u0110\u1eb7ng Th\u00e1i D\u01b0\u01a1ng (2002): T\u1ed5ng quan v\u1ec1 t\u00ecnh h\u00ecnh nghi\u00ean c\u1ee9u v\u00e0 g\u00e2y tr\u1ed3ng c\u00e2y S\u1edf \u1edf Vi\u1ec7t Nam<\/i>. B\u00e1o c\u00e1o chuy\u00ean \u0111\u1ec1 nghi\u00ean c\u1ee9u sinh, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam 2002.<\/li>\n
  2. V\u0169 Th\u1ecb \u0110\u00e0o, \u0110\u00e0o Th\u1ecb Nguy\u00ean, L\u01b0\u01a1ng C\u1ea9m Th\u1ea1ch (1997): M\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn h\u1ea1t S\u1edf<\/i>. B\u00e1o c\u00e1o chuy\u00ean \u0111\u1ec1 h\u1ed9i th\u1ea3o khoa h\u1ecdc t\u1ea1i Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam -12\/1997.<\/li>\n
  3. Nguy\u1ec5n Ti\u1ebfn H\u1ea3i, 1997: “D<\/i>\u1eabn gi\u1ed1ng S\u1edf c\u00e0nh m\u1ec1m Trung Qu\u1ed1c v\u00e0 nh\u1eefng th\u1eed nghi\u1ec7m b\u01b0\u1edbc \u0111\u1ea7u \u1edf Vi\u1ec7t Nam<\/i>“. B\u00e1o c\u00e1o chuy\u00ean \u0111\u1ec1 h\u1ed9i th\u1ea3o khoa h\u1ecdc t\u1ea1i Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam th\u00e1ng 12\/1997.<\/li>\n
  4. Nguy\u1ec5n Quang Kh\u1ea3i, Cao Quang Ngh\u0129a, B\u00f9i Thanh H\u1eb1ng, L\u01b0\u01a1ng Th\u1ebf D\u0169ng, \u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u (2004): Nghi\u00ean c\u1ee9u b\u1ed5 sung m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh ch\u1ee7 y\u1ebfu r\u1ea1o r\u1eebng S\u1edf \u0111\u1ec3 cung c\u1ea5p nguy\u00ean li\u1ec7u cho s\u1ea3n xu\u1ea5t d\u1ea7u th\u1ef1c ph\u1ea9m v\u00e0 k\u1ebft h\u1ee3p ph\u00f2ng h\u1ed9.<\/i> B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m ngi\u1ec7p Vi\u1ec7t Nam 2004.<\/li>\n
  5. M\u00e3 C\u1ea9m L\u00e2m, Tr\u1ea7n V\u0129nh Trung (2005): Kh\u00e1i qu\u00e1t v\u1ec1 nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00e2y S\u1edf t\u1ea1i Trung Qu\u1ed1c.<\/i> H\u1ed9i th\u1ea3o ph\u00e1t tri\u1ec3n c\u00e2y S\u1edf, H\u00e0 N\u1ed9i 2005.<\/li>\n
  6. Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a, \u0110o\u00e0n Th\u1ecb B\u00edch (1990): Tuy\u1ec3n ch\u1ecdn gi\u1ed1ng S\u1edf c\u00f3 n\u0103ng su\u1ea5t cao cho v\u00f9ng L\u1ea1ng S\u01a1n<\/i>. B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i khoa h\u1ecdc 02C-05.01, 1990.<\/li>\n
  7. Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a (1997): Nghi\u00ean c\u1ee9u gi\u1ed1ng v\u00e0 ph\u00e1t tri\u1ec3n c\u00e2y S\u1edf\u00a0 Vi\u1ec7t Nam<\/i>, Vi\u1ec7n KHLNVN.<\/li>\n
  8. Gia Th\u1ee5y (1967): Tr\u1ed3ng r\u1eebn<\/i>g S\u1edf d<\/i>\u1ea7u b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u00e0m \u0111\u1ea5t kh\u00e1c nhau<\/i>. <\/i>Tr\u1ea7n Li\u1ec5u Hoa d\u1ecbch t\u1eeb t\u1ea1p ch\u00ed L\u00e2m nghi\u1ec7p Trung Qu\u1ed1c, s\u1ed1 22, Tr 8 -9, n\u0103m 1966). Th\u00f4ng tin khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p, U\u1ef7 ban KH & KT nh\u00e0 n\u01b0\u1edbc, (5), 1967, tr. 1-2.<\/li>\n
  9. Edward F. Gilmam and Dennis G. Watson (1993): Camellia oleifera-Tea-Oil Camellia<\/i>, Institute of Foot and Agricultural Sciences, University of Florida.<\/li>\n<\/ol>\n

    10. Goi-M (1982): Studies on the flower formation and forcing of some ornamental trees and shrubs native to East Asia<\/i>. Memoirs of the Faculty of Agriculture, No. 38, pp 120, 136 ref. Kagawa University, Miki-tyo, Kagawa-Ken, 761-07 Japan.<\/p>\n

    11. Fang, J. (1994): Advances in science and technology on tea oil tree and tung oil tree in China<\/i> (in Chinese), Forest science<\/i>, No. 7, pp 30-38.<\/p>\n

    12. Hakoda, N. (1987): Studies on the interrelationships between cultivas of Camellia sansaqua Thunb. and species of the genus Camellia Linn<\/i>., based on peroxidase isozymes, Journal of The japanese Society For Horticutural Science, 56 (3) pp 339-343.<\/p>\n

    13. Hakoda, N. and T. Akihama (1988): Morphological classification of cultivars in Camellia sasanqua Thunb<\/i>: Using principal component analysis and cluster analysis, Journal of The Japanese Society For Horticultural Science, 57 (2) pp 233-242.<\/p>\n

    14. Samartin, A. (1992): \u201cPotential for large scale in vitro propagation of Camellia sansaqua Thunb., Journal of Horticural Science<\/i>, 67 (2) pp 211-217.<\/p>\n","protected":false},"excerpt":{"rendered":"

    TS. Ho\u00e0ng V\u0103n Th\u1eafng \u00a0\u0110\u1eb6T V\u1ea4N \u0110\u1ec0 S\u1edf l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u0111a t\u00e1c d\u1ee5ng, ngo\u00e0i gi\u00e1 tr\u1ecb ph\u00f2ng h\u1ed9, S\u1edf c\u00f2n c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao. S\u1ea3n ph\u1ea9m ch\u00ednh c\u1ee7a c\u00e2y S\u1edf l\u00e0 l\u1ea5y h\u1ea1t \u00e9p d\u1ea7u, m\u1ed9t trong c\u00e1c lo\u1ea1i d\u1ea7u \u0103n t\u1eeb th\u1ef1c v\u1eadt c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng cao. \u1ede Vi\u1ec7t […]<\/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\/14644"}],"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=14644"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14644\/revisions"}],"predecessor-version":[{"id":14648,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14644\/revisions\/14648"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=14644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=14644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=14644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}