{"id":168,"date":"2009-03-24T03:48:57","date_gmt":"2005-04-08T02:08:18","guid":{"rendered":"http:\/\/vafs.dungnq.local\/2005\/04\/08\/anh-huong-cua-ky-thuat-tao-rung-den-sinh-truong-cua-rung-trong-tham-canh-go-mo-o-quang-ninh\/"},"modified":"2019-09-25T09:50:00","modified_gmt":"2019-09-25T02:50:00","slug":"anh-huong-cua-ky-thuat-tao-rung-den-sinh-truong-cua-rung-trong-tham-canh-go-mo-o-quang-ninh","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/anh-huong-cua-ky-thuat-tao-rung-den-sinh-truong-cua-rung-trong-tham-canh-go-mo-o-quang-ninh\/","title":{"rendered":"\u1ea2nh h\u01b0\u1edfng c\u1ee7a k\u1ef9 thu\u1eadt t\u1ea1o r\u1eebng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng th\u00e2m canh g\u1ed7 m\u1ecf \u1edf Qu\u1ea3ng Ninh."},"content":{"rendered":"

Tr\u01b0\u01a1ng T\u1ea5t \u0110\u01a1<\/em><\/strong><\/p>\n

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

Nguy\u1ec5n Thanh Ph\u01b0\u01a1ng<\/em><\/h3>\n

Trung t\u00e2m \u1ee9ng d\u1ee5ng KH&SX L\u00e2m N\u00f4ng nghi\u1ec7p Qu\u1ea3ng Ninh<\/em><\/p>\n

Vi\u1ec7c \u00e1p d\u1ee5ng \u0111\u1ed3ng lo\u1ea1t c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh trong tr\u1ed3ng r\u1eebng th\u00e2m canh quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng c\u0169ng nh\u01b0 r\u00fat ng\u1eafn chu k\u1ef3 kinh doanh, mang l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf cho ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng. Sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn c\u1ee7a gi\u1ed1ng, l\u1eadp \u0111\u1ecba, k\u1ef9 thu\u1eadt t\u1ea1o r\u1eebng, ph\u00e2n b\u00f3n, ch\u0103m s\u00f3c, vv… T\u1eeb n\u0103m 1999 \u0111\u1ebfn n\u0103m 2002 Trung t\u00e2m Nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng Khoa h\u1ecdc v\u00e0 S\u1ea3n xu\u1ea5t L\u00e2m N\u00f4ng nghi\u1ec7p Qu\u1ea3ng Ninh \u0111\u00e3 th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i: “Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p th\u00e2m canh r\u1eebng tr\u1ed3ng g\u1ed7 m\u1ecf tr\u00ean m\u1ed9t s\u1ed1 \u0111\u1ecba b\u00e0n tr\u1ecdng \u0111i\u1ec3m t\u1ea1i Qu\u1ea3ng Ninh<\/em>“. Trong b\u00e0i vi\u1ebft n\u00e0y ch\u00fang t\u00f4i n\u00eau l\u00ean m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a k\u1ef9 thu\u1eadt t\u1ea1o r\u1eebng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng th\u00e2m canh g\u1ed7 m\u1ecf \u1edf Qu\u1ea3ng Ninh.<\/p>\n

I. N\u1ed9i dung, \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u.<\/strong><\/p>\n

a) N\u1ed9i dung nghi\u00ean c\u1ee9u<\/em><\/strong><\/p>\n

– \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1eadt \u0111\u1ed9 \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng.<\/p>\n

– \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng.<\/p>\n

– \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c l\u00e0m \u0111\u1ea5t \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng.<\/p>\n

b) \u0110\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u<\/em><\/strong><\/p>\n

\u0110\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u l\u00e0 2 lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng g\u1ed7 m\u1ecf ch\u1ee7 y\u1ebfu: b\u1ea1ch \u0111\u00e0n m\u00f4 U6 v\u00e0 keo lai m\u00f4, tr\u00ean m\u1ed9t s\u1ed1 \u0111\u1ecba b\u00e0n tr\u1ecdng \u0111i\u1ec3m c\u1ee7a Qu\u1ea3ng Ninh nh\u01b0: mi\u1ec1n \u0110\u00f4ng (V\u00e2n \u0110\u1ed3n, M\u00f3ng C\u00e1i, Ti\u00ean Y\u00ean, Ba Ch\u1ebd) v\u00e0 mi\u1ec1n T\u00e2y ( U\u00f4ng B\u00ed, Ho\u00e0nh B\u1ed3),<\/p>\n

Cu\u1ed1c h\u1ed1 30x30x30cm, b\u00f3n l\u00f3t ph\u00e2n NPK 0,2kg\/h\u1ed1, c\u00e2y con 4 th\u00e1ng tu\u1ed5i \u0111\u1ee7 ti\u00eau chu\u1ea9n tr\u1ed3ng r\u1eebng.<\/p>\n

c) Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/em><\/strong><\/p>\n

– S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p sinh th\u00e1i th\u1ef1c nghi\u1ec7m, b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m theo nguy\u00ean t\u1eafc \u0111\u1ed3ng nh\u1ea5t c\u00e1c y\u1ebfu t\u1ed1, x\u1ebfp theo kh\u1ed1i ng\u1eabu nhi\u00ean \u0111\u1ea7y \u0111\u1ee7 3 l\u1ea7n l\u1eb7p, dung l\u01b0\u1ee3ng m\u1eabu t\u1ed1i thi\u1ec3u 49 c\u00e2y\/\u00f4.<\/p>\n

– C\u00e1c ch\u1ec9 ti\u00eau theo d\u00f5i l\u00e0 D1.3<\/sub>, Do , Dt, Hvn, V, M theo ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea th\u00f4ng th\u01b0\u1eddng trong nghi\u00ean c\u1ee9u l\u00e2m nghi\u1ec7p.<\/p>\n

– K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c x\u1eed l\u00ed theo ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea to\u00e1n h\u1ecdc, \u1ee9ng d\u1ee5ng ph\u1ea7n m\u1ec1m Excell 5.0 cho c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng.<\/p>\n

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

a) \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1eadt \u0111\u1ed9 \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng.<\/em><\/strong><\/p>\n

M\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 kh\u1ea3 n\u0103ng \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u c\u1ee7a ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng. M\u1eadt \u0111\u1ed9 h\u1ee3p l\u00fd gi\u00fap cho r\u1eebng tr\u1ed3ng sinh tr\u01b0\u1edfng t\u1ed1t, t\u1eadn d\u1ee5ng h\u1ebft kh\u00f4ng gian dinh d\u01b0\u1ee1ng v\u00e0 gi\u1ea3m \u0111\u01b0\u1ee3c chi ph\u00ed c\u00e2y gi\u1ed1ng \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi nh\u1eefng gi\u1ed1ng t\u1ed1t \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n trong tr\u1ed3ng r\u1eebng th\u00e2m canh. Th\u00ed nghi\u1ec7m nghi\u00ean c\u1ee9u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a y\u1ebfu t\u1ed1 m\u1eadt \u0111\u1ed9 \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh v\u00e0o n\u0103m 2000 v\u00e0 2001, c\u00e1c c\u00f4ng th\u1ee9c (CT) m\u1eadt \u0111\u1ed9 b\u1ed1 tr\u00ed l\u00e0 CT1: 2000 c\u00e2y\/ha; CT2: 1650c\u00e2y\/ha; CT3:1330 c\u00e2y\/ha v\u00e0 CT4: 1100 c\u00e2y\/ha. K\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n \u1edf b\u1ea3ng 1<\/p>\n

B\u1ea3ng 1. \u1ea3nh<\/em><\/strong>h\u01b0\u1edfng c\u1ee7a m\u1eadt \u0111\u1ed9 \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng<\/em><\/strong><\/p>\n

b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai t\u1ea1i Qu\u1ea3ng Ngh\u0129a \u2013 M\u00f3ng C\u00e1i<\/em><\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n
CT<\/strong><\/p>\n

TN<\/strong><\/td>\n

B\u1ea1ch \u0111\u00e0n<\/strong><\/td>\nKeo lai<\/strong><\/td>\n<\/tr>\n
N\u0103m 2000<\/strong><\/p>\n

(27 th\u00e1ng tu\u1ed5i)<\/strong><\/td>\n

N\u0103m 2001 <\/strong><\/p>\n

(20 th\u00e1ng tu\u1ed5i)<\/strong><\/td>\n

N\u0103m 2000<\/strong><\/p>\n

(27 th\u00e1ng tu\u1ed5i)<\/strong><\/td>\n

N\u0103m 2001 <\/strong><\/p>\n

(20 th\u00e1ng tu\u1ed5i)<\/strong><\/td>\n<\/tr>\n

\u0110\u01b0\u1eddng k\u00ednh (cm)<\/strong><\/td>\nChi\u1ec1u cao (m)<\/strong><\/td>\n\u0110\u01b0\u1eddng k\u00ednh (cm)<\/strong><\/td>\nChi\u1ec1u cao (m)<\/strong><\/td>\n\u0110\u01b0\u1eddng k\u00ednh (cm)<\/strong><\/td>\nChi\u1ec1u cao (m)<\/strong><\/td>\n\u0110\u01b0\u1eddng k\u00ednh (cm)<\/strong><\/td>\nChi\u1ec1u cao (m)<\/strong><\/td>\n<\/tr>\n
D1.3<\/strong><\/td>\nVd%<\/strong><\/td>\nHvn<\/strong><\/td>\nVh%<\/strong><\/td>\nD1.3<\/strong><\/td>\nVd%<\/strong><\/td>\nHvn<\/strong><\/td>\nVh%<\/strong><\/td>\nD1.3<\/strong><\/td>\nVd%<\/strong><\/td>\nHvn<\/strong><\/td>\nVh%<\/strong><\/td>\nD1.3<\/strong><\/td>\nVd%<\/strong><\/td>\nHvn<\/strong><\/td>\nVh%<\/strong><\/td>\n<\/tr>\n
1<\/td>\n5,3<\/td>\n14,5<\/td>\n4,6<\/td>\n8,9<\/td>\n4,7<\/td>\n16,2<\/td>\n2,9<\/td>\n8,5<\/td>\n6,4<\/td>\n16,7<\/td>\n6,5<\/td>\n13,3<\/td>\n5,3<\/td>\n12,5<\/td>\n4,5<\/td>\n15,4<\/td>\n<\/tr>\n
2<\/td>\n5,5<\/td>\n15,0<\/td>\n4,5<\/td>\n8,5<\/td>\n4,9<\/td>\n20,9<\/td>\n3,1<\/td>\n10,3<\/td>\n7,0<\/td>\n18,5<\/td>\n6,6<\/td>\n12,3<\/td>\n5,7<\/td>\n14,1<\/td>\n4,5<\/td>\n17,2<\/td>\n<\/tr>\n
3<\/td>\n5,9<\/td>\n17,2<\/td>\n4,5<\/td>\n12,5<\/td>\n5,0<\/td>\n18,7<\/td>\n3,2<\/td>\n4,7<\/td>\n7,3<\/td>\n17,3<\/td>\n6,7<\/td>\n11,5<\/td>\n5,9<\/td>\n16,9<\/td>\n4,6<\/td>\n16,9<\/td>\n<\/tr>\n
4<\/td>\n6,1<\/td>\n17,5<\/td>\n4,4<\/td>\n10,6<\/td>\n5,2<\/td>\n17,4<\/td>\n3,4<\/td>\n2,7<\/td>\n7,4<\/td>\n18,2<\/td>\n6,7<\/td>\n13,5<\/td>\n6,0<\/td>\n20,3<\/td>\n4,6<\/td>\n10,8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ti\u1ebfn h\u00e0nh ki\u1ec3m tra sai kh\u00e1c v\u1ec1 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m theo ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea, k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai cho th\u1ea5y:<\/p>\n

\u0110\u1ed1i v\u1edbi b\u1ea1ch \u0111\u00e0n: <\/u><\/p>\n

Tr\u1ed3ngn\u0103m 2001: D1.3 Fkh\u1ed1i =”0,81″ < F05tra b\u1ea3ng = 6,94 (k1 = 2, k2 = 4)<\/p>\n

Ft\u00ednh =”1,04″ < F05tra b\u1ea3ng = 6,94<\/p>\n

Tr\u1ed3ngn\u0103m 2000: D1.3 Fkh\u1ed1i = 4,5 < F05tra b\u1ea3ng = 6,94 (k1 = 2, k2 = 4)<\/p>\n

Ft\u00ednh =”11,45″ > F05tra b\u1ea3ng = 6,94<\/p>\n

\u0110\u1ed1iv\u1edbi keo lai<\/u>:<\/p>\n

Tr\u1ed3ng<\/u>n\u0103m 2001: D1.3 Fkh\u1ed1i = 0,77 < F05tra b\u1ea3ng = 6,94 (k1 = 2, k2 = 4)<\/p>\n

Ft\u00ednh =”2,8″ < F05tra b\u1ea3ng = 6,94<\/p>\n

Tr\u1ed3ngn\u0103m 2000: D1.3 Fkh\u1ed1i =”1,06″ < F05tra b\u1ea3ng = 6,94 (k1 = 2, k2 = 4)<\/p>\n

Ft\u00ednh =”15,6″ > F05tra b\u1ea3ng = 6,94<\/p>\n

T\u1eeb k\u1ebft qu\u1ea3 sinh tr\u01b0\u1edfng c\u1ee7a hai lo\u00e0i b\u1ea1ch \u0111\u00e0n m\u00f4 v\u00e0 keo lai m\u00f4 cho th\u1ea5y: trong tr\u1ed3ng r\u1eebng th\u00e2m canh g\u1ed7 m\u1ecf, m\u1eadt \u0111\u1ed9 \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng. \u1edf 20 th\u00e1ng tu\u1ed5i ch\u01b0a c\u00f3 s\u1ef1 sai kh\u00e1c l\u1edbn v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c m\u1eadt \u0111\u1ed9; nh\u01b0ng \u1edf 27 th\u00e1ng tu\u1ed5i khi r\u1eebng tr\u1ed3ng b\u1eaft \u0111\u1ea7u kh\u00e9p t\u00e1n th\u00ec \u0111\u1ed1i v\u1edbi c\u1ea3 b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai s\u1ef1 sai kh\u00e1c \u0111\u00e3 th\u1ec3 hi\u1ec7n r\u00f5 r\u1ec7t. Tr\u1ed3ng r\u1eebng th\u00e2m canh g\u1ed7 m\u1ecf b\u1eb1ng b\u1ea1ch \u0111\u00e0n m\u00f4 U6 v\u00e0 keo lai m\u00f4 \u0111\u1ebfn n\u0103m th\u1ee9 3 b\u1eaft \u0111\u1ea7u xu\u1ea5t hi\u1ec7n s\u1ef1 c\u1ea1nh tranh v\u1ec1 kh\u00f4ng gian dinh d\u01b0\u1ee1ng gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 g\u1ea7n nhau trong qu\u1ea7n th\u1ec3, khi m\u1eadt \u0111\u1ed9 l\u1edbn ch\u00fang l\u00e0m gi\u1ea3m s\u1ee9c sinh tr\u01b0\u1edfng c\u1ee7a qu\u1ea7n th\u1ec3. T\u1eeb nh\u1eefng k\u1ebft qu\u1ea3 tr\u00ean c\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh m\u1eadt \u0111\u1ed9 tr\u1ed3ng 1100 c\u00e2y\/ha v\u00e0 1330 c\u00e2y\/ha sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c m\u1eadt \u0111\u1ed9 1650 c\u00e2y\/ha v\u00e0 2000 c\u00e2y\/ha.<\/p>\n

Ki\u1ec3m tra s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa 2 c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m 3 v\u00e0 4 b\u1eb1ng ti\u00eau chu\u1ea9n student, k\u1ebft qu\u1ea3 t t\u00ednh = 2,1< t tra b\u1ea3ng = 2,45 (v\u1edbi b\u1eadc t\u1ef1 do = 6). K\u1ebft qu\u1ea3 \u0111\u00f3 cho th\u1ea5y, sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai \u1edf 27 th\u00e1ng tu\u1ed5i m\u1eadt \u0111\u1ed9 tr\u1ed3ng 1100 c\u00e2y\/ha v\u00e0 1330 c\u00e2y\/ha ch\u01b0a c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t. Nh\u01b0 v\u1eady, \u0111\u1ed1i v\u1edbi tr\u1ed3ng r\u1eebng th\u00e2m canh g\u1ed7 m\u1ecf n\u00ean tr\u1ed3ng v\u1edbi m\u1eadt \u0111\u1ed9 1330 c\u00e2y\/ha. \u0110\u00e2y l\u00e0 m\u1eadt \u0111\u1ed9 c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng cao h\u01a1n so v\u1edbi c\u00e1c m\u1eadt \u0111\u1ed9 1650 c\u00e2y\/ha v\u00e0 2000 c\u00e2y\/ha nh\u01b0ng sinh tr\u01b0\u1edfng kh\u00f4ng sai kh\u00e1c l\u1edbn so v\u1edbi m\u1eadt \u0111\u1ed9 1100 c\u00e2y\/ha.<\/p>\n

Hi\u1ec7n nay, r\u1eebng tr\u1ed3ng g\u1ed7 m\u1ecf th\u01b0\u1eddng \u0111\u01b0\u1ee3c tr\u1ed3ng ph\u1ed5 bi\u1ebfn v\u1edbi m\u1eadt \u0111\u1ed9 1650 c\u00e2y\/ha. Theo ch\u00fang t\u00f4i tr\u1ed3ng v\u1edbi m\u1eadt \u0111\u1ed9 1330 c\u00e2y\/ha l\u00e0 h\u1ee3p l\u00fd, v\u1eeba t\u0103ng m\u1ee9c \u0111\u1ed9 sinh tr\u01b0\u1edfng v\u1eeba gi\u1ea3m \u0111\u01b0\u1ee3c chi ph\u00ed tr\u1ed3ng r\u1eebng ban \u0111\u1ea7u, b\u1edfi v\u00ec gi\u1ed1ng c\u00e2y tr\u1ed3ng r\u1eebng th\u00e2m canh l\u00e0 c\u00e1c gi\u1ed1ng \u01b0u tr\u1ed9i gi\u00e1 th\u00e0nh cao nh\u01b0ng sinh tr\u01b0\u1edfng nhanh h\u01a1n c\u00e1c gi\u1ed1ng \u0111\u1ea1i tr\u00e0, c\u00f9ng v\u1edbi ch\u1ebf \u0111\u1ed9 th\u00e2m canh cao, qu\u1ea3n l\u00fd ch\u0103m s\u00f3c v\u00e0 b\u1ea3o v\u1ec7 t\u1ed1t, m\u1eadt \u0111\u1ed9 ban \u0111\u01b0\u1ee3c duy tr\u00ec ho\u1eb7c gi\u1ea3m kh\u00f4ng \u0111\u00e1ng k\u1ec3 cho \u0111\u1ebfn khi khai th\u00e1c n\u00ean gi\u1ea3m m\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng xu\u1ed1ng 1330 c\u00e2y\/ha nh\u1eb1m r\u00fat ng\u1eafn chu k\u1ef3 kinh doanh gi\u1ea3m \u0111\u01b0\u1ee3c \u0111\u1ea7u t\u01b0 v\u1ec1 gi\u1ed1ng, nh\u00e2n c\u00f4ng v\u00e0 v\u1ed1n cho ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng.<\/p>\n

b) \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng.<\/em><\/strong><\/p>\n

Ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng h\u1ed7n giao gi\u1eefa hai hay nhi\u1ec1u lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn nh\u01b0 l\u00e0 vi\u1ec7c m\u00f4 ph\u1ecfng m\u1ed9t c\u00e1ch kh\u00f4n ngoan c\u1ea5u tr\u00fac t\u1ef1 nhi\u00ean c\u1ee7a r\u1eebng nh\u1eb1m m\u1ee5c \u0111\u00edch ph\u00e1t huy t\u00e1c d\u1ee5ng h\u1ed7 tr\u1ee3 c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y, t\u1eadn d\u1ee5ng kh\u00f4ng gian dinh d\u01b0\u1ee1ng, t\u1ea1o n\u00ean m\u1ed9t khu r\u1eebng tr\u1ed3ng b\u1ec1n v\u1eefng, gi\u1ea3m d\u1ecbch s\u00e2u b\u1ec7nh h\u1ea1i v\u00e0 l\u1eeda r\u1eebng, vv…. Nghi\u00ean c\u1ee9u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng r\u1eebng \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u1ed3ng thu\u1ea7n lo\u00e0i v\u00e0 h\u1ed7n giao b\u1ea1ch \u0111\u00e0n + keo lai, tr\u00ean \u0111\u1ea5t feralit ph\u00e1t tri\u1ec3n tr\u00ean \u0111\u00e1 m\u1eb9 sa th\u1ea1ch, ph\u00e1t \u0111\u1ed1t th\u1ef1c b\u00ec to\u00e0n di\u1ec7n. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n t\u1ea1i b\u1ea3ng 2.<\/p>\n

B\u1ea3ng 2. \u1ea3nh<\/em><\/strong>h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng r\u1eebng \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng<\/em><\/strong><\/p>\n

b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai 42 th\u00e1ng tu\u1ed5i U\u00f4ng B\u00ed \u2013 Qu\u1ea3ng Ninh.<\/em><\/strong><\/p>\n\n\n\n\n\n\n
TT<\/strong><\/td>\nPh\u01b0\u01a1ng th\u1ee9c<\/strong><\/td>\n\u0110\u01b0\u1eddng k\u00ednh (cm)<\/strong><\/td>\nChi\u1ec1u cao (m)<\/strong><\/td>\n\u0110\u01b0\u1eddng k\u00ednh t\u00e1n (m)<\/strong><\/td>\n<\/tr>\n
D1.3<\/strong><\/td>\nVD1.3 (%)<\/strong><\/td>\nHvn<\/strong><\/td>\nVHvn (%)<\/strong><\/td>\nDt<\/strong><\/td>\nVDt (%)<\/strong><\/td>\n<\/tr>\n
1<\/td>\nH\u1ed7n giao<\/u>:<\/p>\n

– B\u1ea1ch \u0111\u00e0n m\u00f4<\/p>\n

– Keo lai m\u00f4<\/td>\n

10,1<\/p>\n

9,2<\/td>\n

12,5<\/p>\n

14,5<\/td>\n

11,0<\/p>\n

10,8<\/td>\n

11,5<\/p>\n

13,4<\/td>\n

2,1<\/p>\n

2,2<\/td>\n

12,6<\/p>\n

13,0<\/td>\n<\/tr>\n

2<\/td>\nThu\u1ea7n lo\u00e0i<\/u>:<\/p>\n

– B\u1ea1ch \u0111\u00e0n m\u00f4<\/p>\n

– Keo lai m\u00f4<\/td>\n

9,4<\/p>\n

10,5<\/td>\n

12,6<\/p>\n

14,0<\/td>\n

10,0<\/p>\n

11,0<\/td>\n

10.7<\/p>\n

12,9<\/td>\n

1,9<\/p>\n

2,3<\/td>\n

12,9<\/p>\n

13,5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

K\u1ebft qu\u1ea3 b\u1ea3ng ghi 2 cho th\u1ea5y: \u1edf 42 th\u00e1ng tu\u1ed5i b\u1ea1ch \u0111\u00e0n tr\u1ed3ng h\u1ed7n giao sinh tr\u01b0\u1edfng nhanh h\u01a1n so v\u1edbi b\u1ea1ch \u0111\u00e0n tr\u1ed3ng thu\u1ea7n lo\u00e0i trong khi \u0111\u00f3 keo lai tr\u1ed3ng thu\u1ea7n sinh tr\u01b0\u1edfng nhanh h\u01a1n so v\u1edbi tr\u1ed3ng h\u1ed7n giao. Do b\u1ea1ch \u0111\u00e0n m\u00f4 U6 l\u00e0 lo\u00e0i c\u00e2y sinh tr\u01b0\u1edfng nhanh, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng n\u0103m \u0111\u1ea7u, n\u00f3 \u0111\u00f2i h\u1ecfi r\u1ea5t cao v\u1ec1 dinh d\u01b0\u1ee1ng n\u00ean \u0111\u00e3 h\u1ea5p thu ph\u1ea7n l\u1edbn dinh d\u01b0\u1ee1ng trong \u0111\u1ea5t, trong khi keo l\u00e0 lo\u00e0i c\u00e2y c\u00f3 kh\u1ea3 n\u0103ng c\u1ed1 \u0111\u1ecbnh \u0111\u1ea1m, h\u1ed7 tr\u1ee3 cho b\u1ea1ch \u0111\u00e0n ph\u00e1t tri\u1ec3n t\u1ed1t v\u00e0 h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c s\u00e2u b\u1ec7nh h\u1ea1i so v\u1edbi tr\u1ed3ng r\u1eebng thu\u1ea7n lo\u00e0i.<\/p>\n

T\u1eeb k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u t\u1ea1i m\u1ed9t s\u1ed1 m\u00f4 h\u00ecnh tr\u00ecnh di\u1ec5n t\u1ea1i mi\u1ec1n T\u00e2y (U\u00f4ng B\u00ed, Ho\u00e0nh B\u1ed3), mi\u1ec1n \u0110\u00f4ng (V\u00e2n \u0110\u1ed3n, Ti\u00ean Y\u00ean, Ba Ch\u1ebd, M\u00f3ng C\u00e1i) cho th\u1ea5y b\u1ea1ch \u0111\u00e0n l\u00e0 lo\u00e0i c\u00e2y k\u00e9n \u0111\u1ea5t, ch\u1ec9 sinh tr\u01b0\u1edfng t\u1ed1t \u1edf n\u01a1i \u0111\u1ea5t t\u1ed1t, c\u00f3 t\u1ea7ng \u0111\u1ea5t d\u00e0y, th\u00e0nh ph\u1ea7n c\u01a1 gi\u1edbi c\u00e1t pha, trong khi \u0111\u00f3 c\u00e2y keo v\u1eabn c\u00f3 th\u1ec3 sinh tr\u01b0\u1edfng tr\u00ean \u0111\u1ea5t ngh\u00e8o x\u1ea5u. Do v\u1eady, n\u1ebfu tr\u1ed3ng r\u1eebng h\u1ed7n giao 1:1 h\u00e0ng c\u00e1ch h\u00e0ng b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai t\u1ea1i m\u1ed9t s\u1ed1 v\u00f9ng \u0111\u1ea5t qu\u00e1 x\u1ea5u s\u1ebd x\u1ea3y ra s\u1ef1 c\u1ea1nh tranh kh\u00f4ng gian dinh d\u01b0\u1ee1ng, \u0111\u1ebfn tu\u1ed5i 3 \u2013 4 b\u1ea1ch \u0111\u00e0n b\u1ecb ch\u00e8n \u00e9p \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn sinh tr\u01b0\u1edfng.<\/p>\n

c) <\/em><\/strong>\u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c l\u00e0m \u0111\u1ea5t \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng.<\/em><\/strong><\/p>\n

\u0110\u1ed1i v\u1edbi tr\u1ed3ng r\u1eebng th\u00e2m canh, ph\u01b0\u01a1ng th\u1ee9c l\u00e0m \u0111\u1ea5t \u0111\u01b0\u1ee3c xem nh\u01b0 l\u00e0 m\u1ed9t kh\u00e2u quan tr\u1ecdng trong c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh. Khi l\u00e0m \u0111\u1ea5t tr\u1ed3ng r\u1eebng, c\u00e1c k\u1ebft c\u1ea5u ch\u1eb7t, b\u00ed c\u1ee7a \u0111\u1ea5t b\u1ecb ph\u00e1 v\u1ee1 t\u1ea1o n\u00ean kho\u1ea3ng \u0111\u1ea5t t\u01a1i x\u1ed1p quanh b\u1ed9 r\u1ec5 c\u00e2y, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c vi sinh v\u1eadt trong \u0111\u1ea5t ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh, ph\u00e2n hu\u1ef7 c\u00e1c ch\u1ea5t h\u1eefu c\u01a1, k\u00edch th\u00edch, t\u0103ng c\u01b0\u1eddng s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ec7 r\u1ec5. V\u1edbi \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea5t d\u1ed1c, kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n c\u00e0y ng\u1ea7m th\u00ec ph\u01b0\u01a1ng ph\u00e1p l\u00e0m \u0111\u1ea5t c\u1ee5c b\u1ed9 t\u1ecf ra c\u00f3 hi\u1ec7u qu\u1ea3 trong tr\u1ed3ng r\u1eebng th\u00e2m canh g\u1ed7 m\u1ecf \u1edf Qu\u1ea3ng Ninh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c l\u00e0m \u0111\u1ea5t \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i Qu\u1ea3ng Ngh\u0129a \u2013 M\u00f3ng C\u00e1i \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n t\u1ea1i b\u1ea3ng 3.<\/p>\n

B\u1ea3ng 3. \u1ea3nh<\/em><\/strong>h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng th\u1ee9c l\u00e0m \u0111\u1ea5t \u0111\u1ebfn sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng<\/em><\/strong><\/p>\n

b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai 17 th\u00e1ng tu\u1ed5i t\u1ea1i Qu\u1ea3ng Ngh\u0129a \u2013 M\u00f3ng C\u00e1i.<\/em><\/strong><\/p>\n\n\n\n\n\n\n\n\n
TT<\/strong><\/td>\n\n

C\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m<\/h1>\n<\/td>\n

B\u1ea1ch \u0111\u00e0n<\/strong><\/td>\nKeo lai<\/strong><\/td>\n<\/tr>\n
D1.3 (cm)<\/strong><\/td>\nHvn (m)<\/strong><\/td>\nD1.3 (cm)<\/strong><\/td>\nHvn (m)<\/strong><\/td>\n<\/tr>\n
1<\/td>\nCT1: Cu\u1ed1c h\u1ed1 30x30x30 cm<\/td>\n4,17<\/td>\n3,12<\/td>\n5,71<\/td>\n4,72<\/td>\n<\/tr>\n
2<\/td>\nCT2: Cu\u1ed1c h\u1ed1 40x40x40cm<\/td>\n4,55<\/td>\n3,40<\/td>\n6,03<\/td>\n4,91<\/td>\n<\/tr>\n
3<\/td>\nCT3: Cu\u1ed1c h\u1ed1 50x50x50 cm<\/td>\n4,82<\/td>\n3,63<\/td>\n6,31<\/td>\n4,95<\/td>\n<\/tr>\n
4<\/td>\nCT4: Cu\u1ed1c h\u1ed1 60x60x60 cm<\/td>\n4,91<\/td>\n3,57<\/td>\n6,42<\/td>\n4,90<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1ec3 kh\u1eb3ng \u0111\u1ecbnh \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u00e0m \u0111\u1ea5t \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh ki\u1ec3m tra sai kh\u00e1c theo ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea k\u1ebft qu\u1ea3 cho th\u1ea5y:<\/p>\n

\u0110\u1ed1iv\u1edbi b\u1ea1ch \u0111\u00e0n: D1.3 Fkh\u1ed1i =”3,32″ < F05tra b\u1ea3ng = 6,94 (k1 = 2, k2 = 4)<\/p>\n

Ft\u00ednh =”7,02″ > F05tra b\u1ea3ng = 6,94<\/p>\n

\u0110\u1ed1iv\u1edbi keo lai: D1.3 Fkh\u1ed1i =”0,03″ < F05tra b\u1ea3ng = 6,94 (k1 = 2, k2 = 4)<\/p>\n

Ft\u00ednh =”6,98″ < F05tra b\u1ea3ng = 6,94<\/p>\n

T\u1eeb k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea cho ph\u00e9p kh\u1eb3ng \u0111\u1ecbnh: ph\u01b0\u01a1ng th\u1ee9c l\u00e0m \u0111\u1ea5t c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai. H\u1ed1 cu\u1ed1c \u1edf k\u00edch c\u1ee1 l\u1edbn 60x60x60 cm sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi c\u1ee1 nh\u1ecf 30x30x30cm.<\/p>\n

Ki\u1ec3m tra s\u1ef1 kh\u00e1c bi\u1ec7t c\u1ee7a 2 c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m 3 v\u00e0 4 b\u1eb1ng ti\u00eau chu\u1ea9n student, k\u1ebft qu\u1ea3 t t\u00ednh < t tra b\u1ea3ng, c\u00f3 ngh\u0129a l\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n v\u00e0 keo lai \u1edf 17 th\u00e1ng tu\u1ed5i k\u00edch th\u01b0\u1edbc h\u1ed1 cu\u1ed1c 50x50x50cm v\u00e0 60x60x60cm ch\u01b0a c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t.<\/p>\n

Nh\u01b0 v\u1eady, \u0111\u1ed1i v\u1edbi tr\u1ed3ng r\u1eebng th\u00e2m canh g\u1ed7 m\u1ecf n\u00ean cu\u1ed1c h\u1ed1 50x50x50cm (ho\u1eb7c 40x40x40cm tu\u1ef3 t\u1eebng \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea5t \u0111ai v\u00e0 nh\u00e2n l\u1ef1c tr\u1ed3ng r\u1eebng). \u0110\u00e2y l\u00e0 k\u00edch th\u01b0\u1edbc h\u1ed1 c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng cao h\u01a1n so v\u1edbi k\u00edch th\u01b0\u1edbc 30x30x30cm, trong khi sinh tr\u01b0\u1edfng kh\u00f4ng sai kh\u00e1c l\u1edbn so v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ed1 60x60x60cm.<\/p>\n

III. K\u1ebft lu\u1eadn<\/strong>.<\/p>\n

T\u1eeb nh\u1eefng k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u00fang t\u00f4i \u0111i \u0111\u1ebfn k\u1ebft lu\u1eadn:<\/p>\n

– M\u1eadt \u0111\u1ed9 c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao c\u1ee7a r\u1eebng tr\u1ed3ng. Tr\u1ed3ng r\u1eebng th\u00e2m canh g\u1ed7 m\u1ecf \u0111\u1ed1i v\u1edbi b\u1ea1ch \u0111\u00e0n m\u00f4 U6 v\u00e0 keo lai m\u00f4 \u1edf Qu\u1ea3ng Ninh m\u1eadt \u0111\u1ed9 1330 c\u00e2y\/ha c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng cao h\u01a1n m\u1eadt \u0111\u1ed9 1650 c\u00e2y\/ha v\u00e0 2000 c\u00e2y\/ha trong khi sinh tr\u01b0\u1edfng kh\u00f4ng sai kh\u00e1c l\u1edbn so v\u1edbi m\u1eadt \u0111\u1ed9 1100 c\u00e2y\/ha.<\/p>\n

– B\u1ea1ch \u0111\u00e0n tr\u1ed3ng h\u1ed7n giao v\u1edbi keo lai sinh tr\u01b0\u1edfng nhanh h\u01a1n tr\u1ed3ng thu\u1ea7n lo\u00e0i trong khi keo lai tr\u1ed3ng thu\u1ea7n lo\u00e0i sinh tr\u01b0\u1edfng nhanh h\u01a1n tr\u1ed3ng h\u1ed7n giao. T\u1ea1i m\u1ed9t s\u1ed1 v\u00f9ng \u0111\u1ea5t qu\u00e1 x\u1ea5u khi tr\u1ed3ng h\u1ed7n giao b\u1ea1ch \u0111\u00e0n + keo lai \u0111\u1ebfn tu\u1ed5i 3-4 keo lai sinh tr\u01b0\u1edfng nhanh, c\u1ea1nh tranh kh\u00f4ng gian dinh d\u01b0\u1ee1ng n\u00ean \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a b\u1ea1ch \u0111\u00e0n. Do \u0111\u00f3, khi tr\u1ed3ng h\u1ed7n giao c\u1ea7n xem x\u00e9t \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea5t tr\u1ed3ng r\u1eebng b\u1ea1ch \u0111\u00e0n, n\u00ean tr\u1ed3ng theo ph\u01b0\u01a1ng th\u1ee9c h\u1ed7n giao theo b\u0103ng t\u1eeb 2-3 h\u00e0ng b\u1ea1ch \u0111\u00e0n h\u1ed7n giao v\u1edbi 1-2 h\u00e0ng keo.<\/p>\n

– Tr\u00ean m\u1ed9t s\u1ed1 l\u1eadp \u0111\u1ecba t\u1ed1t c\u00f3 th\u1ec3 tr\u1ed3ng r\u1eebng th\u00e2m canh b\u1ea1ch \u0111\u00e0n m\u00f4 U6 v\u00e0 keo lai m\u00f4 thu\u1ea7n lo\u00e0i.<\/p>\n

– K\u00edch th\u01b0\u1edbc h\u1ed1 c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng. Cu\u1ed1c h\u1ed1 v\u1edbi k\u00edch th\u01b0\u1edbc l\u00e0 50x50x50cm ho\u1eb7c 40x40x40cm c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng kh\u00e1c xa so v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ed1 30x30x30cm, nh\u01b0ng sinh tr\u01b0\u1edfng kh\u00f4ng sai kh\u00e1c l\u1edbn so v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ed1 60x60x60cm.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n

1. V\u0169 Ti\u1ebfn Hinh, Ph\u1ea1m Ng\u1ecdc Giao (1997), Gi\u00e1o tr\u00ecnh \u0111i\u1ec1u tra r\u1eebng, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p, NXB N\u00f4ng nghi\u1ec7p H\u00e0 N\u1ed9i.<\/p>\n

2. Nguy\u1ec5n Xu\u00e2n Qu\u00e1t (1995), Tr\u1ed3ng r\u1eebng th\u00e2m canh v\u00e0 th\u00e2m canh r\u1eebng tr\u1ed3ng<\/em>. Ki\u1ebfn th\u1ee9c l\u00e2m nghi\u1ec7p x\u00e3 h\u1ed9i t\u1eadp 2, NXB N\u00f4ng nghi\u1ec7p, H\u00e0 N\u1ed9i.<\/p>\n

3. Nguy\u1ec5n H\u1ea3i Tu\u1ea5t (1992), Th\u1ed1ng k\u00ea to\u00e1n h\u1ecdc trong L\u00e2m nghi\u1ec7p<\/em>, NXB N\u00f4ng nghi\u1ec7p, H\u00e0 N\u1ed9i, 290 trang.<\/p>\n

4. Nguy\u1ec5n H\u1eefu V\u0129nh, Ng\u00f4 Quang \u0110\u00ea (1998), Gi\u00e1o tr\u00ecnh tr\u1ed3ng r\u1eebng<\/em>, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p, NXB N\u00f4ng nghi\u1ec7p, H\u00e0 N\u1ed9i.<\/p>\n

Summary<\/h1>\n

Establishment of intensive forest plantation together with application of successive silvicultural techniques is aimed at raising the productivity and quality of the forest as well as shortening the management rotation bringing about high economic efficiency for forest planting people. The research subject: “Research on technical measures for intensive management of forest plantation supplying mine-props in focused areas in Quang Ninh” has been carried out at the Quang Ning Centre for science application and forest and agricultural production from 1999 to 2002. Research results on effect of forest establishment technique on growth of forest plantation supplying mine-props in Quang Ninh show that planting density, forest planting system, size of planting holes markedly affect the forest plantation growth. As regards intensive forest plantation supplying mine-props with 2 Urphylla and Acacia it is advisable to raise mixed plantation by bands, initial density 1330 trees\/ha, planting holes 40x40x40cm.<\/p>\n","protected":false},"excerpt":{"rendered":"

Vi\u1ec7c áp d\u1ee5ng \u0111\u1ed3ng lo\u1ea1t các bi\u1ec7n pháp k\u1ef9 thu\u1eadt lâm sinh trong tr\u1ed3ng r\u1eebng thâm canh quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng c\u0169ng nh\u01b0 rút ng\u1eafn chu k\u1ef3 kinh doanh, mang l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf cho ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng. Sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn c\u1ee7a gi\u1ed1ng, l\u1eadp \u0111\u1ecba, k\u1ef9 thu\u1eadt t\u1ea1o r\u1eebng, phân bón, ch\u0103m sóc, vv… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/168"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=168"}],"version-history":[{"count":6,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/168\/revisions"}],"predecessor-version":[{"id":19228,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/168\/revisions\/19228"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}