{"id":14534,"date":"2015-04-03T09:42:39","date_gmt":"2015-04-03T02:42:39","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=14534"},"modified":"2015-04-02T09:49:04","modified_gmt":"2015-04-02T02:49:04","slug":"bao-cao-ket-qua-de-tai-ung-dung-tien-bo-ky-thuat-xay-dung-mo-hinh-trong-rung-go-lon-bang-cac-loai-cay-ban-dia-vung-trung-tam-bac-bo","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-ket-qua-de-tai-ung-dung-tien-bo-ky-thuat-xay-dung-mo-hinh-trong-rung-go-lon-bang-cac-loai-cay-ban-dia-vung-trung-tam-bac-bo\/","title":{"rendered":"B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 \u0111\u1ec1 t\u00e0i: \u1ee8ng d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn b\u1eb1ng c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba v\u00f9ng Trung t\u00e2m B\u1eafc b\u1ed9"},"content":{"rendered":"

Nguy<\/i><\/b>\u1ec5n Th\u1ecb Nhung v\u00e0 c\u1ed9ng s\u1ef1<\/i><\/b><\/p>\n

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

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

V\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9 l\u00e0 m\u1ed9t trong 9 v\u00f9ng sinh th\u00e1i l\u00e2m nghi\u1ec7p. Di\u1ec7n t\u00edch to\u00e0n v\u00f9ng chi\u1ebfm kho\u1ea3ng 1\/3 di\u1ec7n t\u00edch mi\u1ec1n n\u00fai ph\u00eda B\u1eafc v\u00e0 kho\u1ea3ng 1\/10 di\u1ec7n t\u00edch c\u1ea3 n\u00ad\u01b0\u1edbc v\u1edbi t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng v\u00e0 \u0111\u1ea5t l\u00e0 2.267.597ha. Trong \u0111\u00f3 : \u0110\u1ea5t c\u00f3 r\u1eebng l\u00e0 1.451.940ha, \u0111\u1ea5t tr\u1ed1ng \u0111\u1ed3i n\u00fai tr\u1ecdc l\u00e0 815.657ha. \u0110\u1ed9 che ph\u1ee7 b\u00ecnh qu\u00e2n 42,35%, cao nh\u1ea5t l\u00e0 Tuy\u00ean Quang 56,7%, th\u1ea5p nh\u1ea5t l\u00e0 V\u0129nh Ph\u00fac 20,3%. \u0110\u1ed9 che ph\u1ee7 to\u00e0n v\u00f9ng \u0111\u1ea1t x\u1ea5p x\u1ec9 t\u1ec9\u00a0 l\u1ec7 che ph\u1ee7 to\u00e0n qu\u1ed1c n\u0103m 1943 l\u00e0 43%.\u00a0 \u0110\u00e2y l\u00e0 khu v\u1ef1c gi\u00e0u c\u00f3, \u0111a d\u1ea1ng v\u1ec1 c\u1ea3 th\u00e0nh ph\u1ea7n lo\u00e0i \u0111\u1ed9ng th\u1ef1c v\u1eadt, ki\u1ec3u r\u1eebng v\u00e0 ch\u1ea5t l\u00ad\u01b0\u1ee3ng r\u1eebng.<\/p>\n

R\u1eebng t\u1ef1 nhi\u00ean c\u1ee7a v\u00f9ng Trung t\u00e2m \u0111\u00e3 v\u00e0 \u0111ang b\u1ecb suy tho\u00e1i nghi\u00eam tr\u1ecdng. S\u1ef1 suy tho\u00e1i n\u00e0y th\u1ec3 hi\u1ec7n \u1edf s\u1ef1 gi\u1ea3m thi\u1ec3u kh\u1ea3 n\u0103ng cung c\u1ea5p g\u1ed7 v\u00e0 c\u00e1c l\u00e2m s\u1ea3n kh\u00e1c c\u0169ng nh\u00ad\u01b0 s\u1ef1 gi\u1ea3m thi\u1ec3u kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u00ad\u1eddng sinh th\u00e1i. C\u00e1c lo\u00e0i g\u1ed7 qu\u00ed nh\u01b0:\u00ad \u0110inh, L\u00e1t, Lim, Nghi\u1ebfn\u2026\u0111\u00e3 b\u1ecb khai\u00a0 th\u00e1c c\u1ea1n ki\u1ec7t. Nguy\u00ean nh\u00e2n vi\u1ec7c m\u1ea5t r\u1eebng th\u00ec c\u00f3 r\u1ea5t nhi\u1ec1u nh\u01b0\u00adng quan tr\u1ecdng h\u01a1n c\u1ea3 l\u00e0 \u00fd th\u1ee9c c\u1ee7a ng\u00ad\u01b0\u1eddi d\u00e2n trong vi\u1ec7c b\u1ea3o v\u1ec7 x\u00e2y d\u1ef1ng v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng. B\u00ean c\u1ea1nh \u0111\u00f3 ph\u1ea3i k\u1ec3 \u0111\u1ebfn vi\u1ec7c kinh doanh r\u1eebng kh\u00f4ng b\u1ec1n v\u1eefng c\u1ee7a c\u00e1c l\u00e2m tr\u00ad\u01b0\u1eddng. \u0110\u1ec3 gi\u1ea3i quy\u1ebft nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a x\u00e3 h\u1ed9i v\u1ec1 l\u00e2m s\u1ea3n c\u00f4ng t\u00e1c tr\u1ed3ng r\u1eebng \u0111\u00e3 \u0111\u01b0\u00ad\u1ee3c Nh\u00e0 n\u01b0\u00ad\u1edbc quan t\u00e2m ch\u00fa \u00fd. \u0110\u1ebfn n\u0103m 2004 c\u1ea3 n\u01b0\u00ad\u1edbc \u0111\u00e3 tr\u1ed3ng \u0111\u00ad\u01b0\u1ee3c 2.219.000ha r\u1eebng. Tuy nhi\u00ean \u0111a s\u1ed1 c\u00e2y tr\u1ed3ng l\u00e0 c\u00e2y nh\u1eadp n\u1ed9i(B\u1ea1ch \u0111\u00e0n, Keo) v\u1edbi ph\u01b0\u00ad\u01a1ng th\u1ee9c tr\u1ed3ng ch\u1ee7 y\u1ebfu l\u00e0 thu\u1ea7n lo\u00e0i. Vi\u1ec7c l\u00e0m thay \u0111\u1ed5i m\u1ed9t di\u1ec7n t\u00edch kh\u00e1 l\u1edbn \u1edf v\u00f9ng Trung t\u00e2m B\u1eafc b\u1ed9 t\u1eeb tr\u1ea1ng th\u00e1i r\u1eebng m\u00ad\u01b0a th\u00e0nh tr\u1ea1ng th\u00e1i r\u1eebng kh\u00f4 \u0111\u00e3 g\u00e2y ra c\u00e1c bi\u1ebfn \u0111\u1ed5i v\u1ec1 kh\u00ed h\u1eadu v\u00e0 m\u00f4i tr\u00ad\u01b0\u1eddng l\u00e0 \u0111i\u1ec1u kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi. C\u00f2n x\u00e9t v\u1ec1 m\u1eb7t \u0111a d\u1ea1ng sinh h\u1ecdc v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u00ad\u1eddng th\u00ec r\u1eebng tr\u1ed3ng c\u00e2y nh\u1eadp n\u1ed9i c\u00f3 gi\u00e1 tr\u1ecb th\u1ea5p.<\/p>\n

Nh\u1eadn th\u1ee9c v\u1ec1 t\u00ecnh tr\u1ea1ng r\u1eebng hi\u1ec7n nay \u0110\u1ea3ng, Nh\u00e0 n\u00ad\u01b0\u1edbc, Nh\u00e2n d\u00e2n ta \u0111\u00e3 s\u1edbm c\u00f3 h\u00e0nh \u0111\u1ed9ng nh\u1eb1m b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng. \u0110\u00f3 l\u00e0 ph\u00ea chu\u1ea9n v\u00e0 t\u00edch c\u1ef1c th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n 5 tri\u1ec7u ha r\u1eebng v\u1edbi k\u1ebft qu\u1ea3 mong \u0111\u1ee3i l\u00e0 kinh doanh l\u00e2m nghi\u1ec7p b\u1ec1n v\u1eefng tr\u00ean 3 m\u1eb7t: m\u00f4i tr\u01b0\u1eddng, kinh t\u1ebf, x\u00e3 h\u1ed9i.<\/p>\n

Theo gi\u00e1o s\u00ad\u01b0 Nguy\u1ec5n Xu\u00e2n Qu\u00e1t hi\u1ec7n nay ch\u00fang ta \u0111\u00e3 c\u00f3 \u0111\u01b0\u00ad\u1ee3c th\u00f4ng tin v\u00e0 ti\u1ebfp c\u1eadn 700 lo\u00e0i t\u1eeb \u0111\u00f3 \u0111\u1ec1 xu\u1ea5t \u0111\u01b0\u00ad\u1ee3c 210 lo\u00e0i c\u00e2y g\u1ed7 b\u1ea3n \u0111\u1ecba c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng cao cho 9 v\u00f9ng s\u1ea3n xu\u1ea5t L\u00e2m nghi\u1ec7p, trong \u0111\u00f3 v\u00f9ng Trung t\u00e2m B\u1eafc b\u1ed9 c\u00f3 81 lo\u00e0i. Trong \u2018S\u1eed d\u1ee5ng c\u00e2y b\u1ea3n \u0111\u1ecba v\u00e0o tr\u1ed3ng r\u1eebng \u1edf Vi\u1ec7t nam\u2019 c\u00e1c t\u00e1c gi\u1ea3 \u0111\u00e3 khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng 31 lo\u00e0i trong \u0111\u00f3 v\u00f9ng Trung t\u00e2m c\u00f3 16 lo\u00e0i,<\/p>\n

T\u1eeb n\u0103m 2005 B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n \u0111\u00e3 ph\u00ea duy\u1ec7t cho Trung t\u00e2m NCTNLS C\u1ea7u Hai th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i:\u201c\u1ee8ng d\u1ee5ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng g\u1ed7 l\u1edbn b\u1eb1ng c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba v\u00f9ng Trung t\u00e2m B\u1eafc b\u1ed9\u201d.<\/b><\/p>\n

\"15-04-03<\/a><\/p>\n

II.<\/b> \u00a0N\u1ed8I DUNG, PH\u00ad\u01af\u01a0NG PH\u00c1P NGHI\u00caN C\u1ee8U<\/b><\/p>\n

\u00a01.N\u1ed9i dung nghi\u00ean c\u1ee9u<\/strong> <\/i><\/p>\n

. \u00a0X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh, x\u00e2y d\u1ef1ng h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt tr\u1ed3ng c\u00e1c lo\u00e0i c\u00e2y \u0111\u00e3 ch\u1ecdn<\/p>\n

.2. Ph\u00ad\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/b><\/p>\n

– Ph\u00ad\u01b0\u01a1ng ph\u00e1p sinh th\u00e1i th\u1ef1c nghi\u1ec7m: B\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m\u00a0 theo ph\u01b0\u01a1ng ph\u00e1p h\u1ed7n h\u1ee3p( b\u1ed1 tr\u00ed ng\u1eabu nhi\u00ean c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m tr\u00ean hi\u1ec7n tr\u01b0\u1eddng nghi\u00ean c\u1ee9u)<\/p>\n

* H\u1ed7n giao theo c\u00e2y\u00a0 : B\u1ed1 tr\u00ed c\u00e2y \u00a0n\u1ecd c\u00e2y kia<\/p>\n

* H\u1ed7n giao theo h\u00e0ng: B\u1ed1 tr\u00ed \u00a0tr\u1ed3ng m\u1ed7i \u00a0lo\u00e0i \u00a0c\u00e2y \u00a0m\u1ed9t h\u00e0ng<\/p>\n

* H\u1ed7n giao theo d\u1ea3i\u00a0\u00a0 : B\u1ed1 tr\u00ed 3 h\u00e0ng c\u00e2y \u00a0n\u1ecd 3 h\u00e0ng \u00a0c\u00e2y kia<\/p>\n

III. K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U <\/b><\/p>\n

1. X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh<\/b><\/p>\n

a, Lo\u00e0i c\u00e2y, ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng r\u1eebng <\/i><\/p>\n

+. L\u1ef1a ch\u1ecdn lo\u00e0i c\u00e2y g\u00e2y tr\u1ed3ng<\/p>\n

– Ti\u00eau\u00a0 ch\u00ed l\u1ef1a ch\u1ecdn lo\u00e0i c\u00e2y: Ph\u00e2n b\u1ed1 r\u1ed9ng, gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng cao,sinh tr\u00ad\u01b0\u1edfng nhanh, t\u00e1n l\u00e1 k\u00edn v\u00e0 r\u1ed9ng, ngu\u1ed3n gi\u1ed1ng d\u1ed3i d\u00e0o, d\u1ec5 gieo \u00ad\u01b0\u01a1m, d\u1ec5 g\u00e2y tr\u1ed3ng.<\/p>\n

–\u00a0 C\u00e1c lo\u00e0i c\u00e2y \u0111\u1ec1 t\u00e0i \u0111\u00e3 l\u1ef1a ch\u1ecdn: Re g\u1eebng, D\u1ebb \u0111\u1ecf, Kh\u00e1o v\u00e0ng, S\u1ed3i ph\u1ea3ng, Xoan \u0111\u00e0o<\/p>\n

+. Ph\u00ad\u01b0\u01a1ng th\u1ee9c v\u00e0 k\u1ef9 thu\u1eadt tr\u1ed3ng <\/i><\/p>\n

– Ph\u00ad\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng:<\/p>\n

+ Tr\u1ed3ng thu\u1ea7n lo\u00e0i:<\/p>\n

+ Tr\u1ed3ng h\u1ed7n giao:<\/p>\n

+ Ti\u00eau chu\u1ea9n c\u00e2y con tr\u01b0\u00ad\u1edbc khi \u0111em tr\u1ed3ng <\/i><\/p>\n

– C\u00e2y con c\u00f3 b\u1ea7u, K\u00edch th\u00ad\u01b0\u1edbc b\u1ea7u 10 x14cm<\/p>\n

– Tu\u1ed5i c\u00e2y con t\u1eeb 6-8 th\u00e1ng<\/p>\n

– C\u00e2y xanh t\u1ed1t, kh\u00f4ng cong queo, s\u00e2u b\u1ec7nh, kh\u00f4ng c\u1ee5t ng\u1ecdn<\/p>\n

– K\u00edch th\u01b0\u00ad\u1edbc c\u00e2y: \u0110\u01b0\u00ad\u1eddng k\u00ednh c\u1ed5 r\u1ec5 t\u1eeb 0.7- 0.8cm; chi\u1ec1u cao t\u1eeb 35- 50cm<\/p>\n

+B\u1ed1 tr\u00ed th\u00ed nghi\u00eam: <\/i><\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 x\u00e2y d\u1ef1ng 7 m\u00f4 h\u00ecnh g\u1ed3m tr\u1ed3ng thu\u1ea7n lo\u00e0i v\u00e0 h\u1ed7n lo\u00e0i. M\u1ed7i m\u00f4 h\u00ecnh h\u1ed7n lo\u00e0i b\u1ed1 tr\u00ed theo 3 c\u00f4ng th\u1ee9c : H\u1ed7n giao theo c\u00e2y, h\u1ed7n giao theo h\u00e0ng v\u00e0 h\u1ed7n giao theo d\u1ea3i. M\u1ed7i c\u00f4ng th\u1ee9c \u0111\u01b0\u00ad\u1ee3c l\u1eb7p l\u1ea1i 3 l\u1ea7n. B\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m nh\u00ad\u01b0 v\u1eady \u0111\u1ec1 t\u00e0i mong mu\u1ed1n s\u1ebd x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u00ad\u1ee3c m\u1ed1i quan h\u1ec7 t\u00ad\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c lo\u00e0i l\u00e0 th\u00fac \u0111\u1ea9y hay k\u00ecm h\u00e3m v\u00e0 th\u1eddi \u0111i\u1ec3m n\u1ea3y sinh m\u1ed1i quan h\u1ec7 \u0111\u00f3 \u0111\u1ec3 t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh \u0111\u00ad\u01b0\u1ee3c c\u00e1c lo\u00e0i c\u00f3 th\u1ec3 h\u1ed7n giao v\u1edbi nhau hay kh\u00f4ng v\u00e0 h\u1ed7n giao nh\u01b0\u00ad th\u1ebf n\u00e0o l\u00e0 t\u1ed1t nh\u1ea5t.<\/p>\n

b<\/i><\/b>. \u0110\u00e1nh gi\u00e1 b\u00ad\u01b0\u1edbc \u0111\u1ea7u\u00a0 v\u1ec1 sinh tr\u00ad\u01b0\u1edfng c\u1ee7a c\u00e2y tr\u1ed3ng<\/b><\/i> : <\/b><\/p>\n

b.1.Sinh tr\u00ad\u01b0\u1edfng chi\u1ec1u cao trong c\u00e1c m\u00f4 h\u00ecnh h\u1ed7n lo\u00e0i:<\/p>\n

Sinh tr\u00ad\u01b0\u1edfng v\u00e0 t\u0103ng tr\u00ad\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao c\u1ee7a c\u00e2y r\u1eebng l\u00e0 m\u1ed9t ch\u1ec9 ti\u00eau quan tr\u1ecdng trong vi\u1ec7c \u0111\u00e1nh gi\u00e1\u00b8 sinh tr\u00ad\u01b0\u1edfng c\u1ee7a c\u00e2y tr\u1ed3ng. Ch\u1ec9 ti\u00eau n\u00e0y c\u00f3 quan h\u1ec7 ch\u1eb7t ch\u1ebd \u0111\u1ebfn tr\u1eef l\u00ad\u01b0\u1ee3ng r\u1eebng m\u00e0 \u00edt ch\u1ecbu \u1ea3nh h\u00ad\u01b0\u1edfng c\u1ee7a c\u00e1c bi\u1ec7n ph\u00e1p kinh doanh. Theo Eichhorn(1904) th\u00ec tr\u1eef l\u1ef1\u01a1ng r\u1eebng l\u00e0 h\u00e0m s\u1ed1 c\u1ee7a chi\u1ec1u cao l\u00e2m ph\u1ea7n v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c l\u00e2m ph\u1ea7n tr\u00ean c\u00e1c \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba kh\u00e1c nhau c\u00f3 c\u00f9ng tr\u1eef\u00a0 l\u01b0\u1ee3ng khi c\u00f3 c\u00f9ng chi\u1ec1u cao b\u00ecnh qu\u00e2n. Th\u00f4ng th\u00ad\u01b0\u1eddng ng\u01b0\u1eddi ta d\u00f9ng ch\u1ec9 ti\u00eau v\u1ec1 sinh tr\u00ad\u01b0\u1edfng v\u00e0 t\u0103ng tr\u00ad\u01b0\u1edfng chi\u1ec1u cao \u0111\u1ec3 \u0111\u00e1nh gi\u00e1\u00b8 c\u00e2y sinh tr\u01b0\u1edfng nhanh v\u00e0 c\u00e2y sinh tr\u00ad\u01b0\u1edfng ch\u1eadm hay c\u00e2y sinh tr\u00ad\u01b0\u1edfng trung b\u00ecnh \u0111\u1ed1i v\u1edbi r\u1eebng tr\u1ed3ng \u1edf giai \u0111o\u1ea1n \u0111\u1ea7u.<\/p>\n

K\u00ea\u0301t qua\u0309 ti\u0301nh toa\u0301n ca\u0301c chi\u0309 ti\u00eau v\u00ea\u0300 sinh tr\u00ad\u01b0\u01a1\u0309ng chi\u1ec1u cao th\u00ea\u0309 hi\u00ea\u0323n \u01a1\u0309 bi\u1ec3u 1:<\/p>\n

Bi\u1ec3u 1: Ca\u0301c chi\u0309 ti\u00eau v\u00ea\u0300 chi\u00ea\u0300u cao cu\u0309a ca\u0301c loa\u0300i c\u00e2y 3 tu\u00f4\u0309i trong ca\u0301c m\u00f4 hi\u0300nh h\u00f4\u0303n loa\u0300i<\/strong><\/p>\n

\u00a0\u00a0\u00a0 C\u00f4ng th\u01b0\u0301c thi\u0301 nghi\u00ea\u0323m<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n\n

Loa\u0300i c\u00e2y<\/b><\/p>\n<\/td>\n

\n

Hmax (m)<\/b><\/p>\n<\/td>\n

\n

Hmim (m)<\/b><\/p>\n<\/td>\n

\n

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

\n

H\u00ea\u0323 s\u00f4\u0301 bi\u1ebfn \u0111\u00f4\u0323ng\u00a0 v\u00ea\u0300 chi\u00ea\u0300u cao<\/b><\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 5 loa\u0300i<\/td>\nS\u00f4\u0300i pha\u0309ng<\/td>\n\n

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

\n

2,67<\/p>\n<\/td>\n

\n

4,41<\/p>\n<\/td>\n

\n

20,13<\/p>\n<\/td>\n<\/tr>\n

Re g\u01b0\u0300ng<\/td>\n\n

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

\n

2,17<\/p>\n<\/td>\n

\n

3,55<\/p>\n<\/td>\n

\n

19,14<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

4,93<\/p>\n<\/td>\n

\n

2,20<\/p>\n<\/td>\n

\n

3,75<\/p>\n<\/td>\n

\n

21,68<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

5,27<\/p>\n<\/td>\n

\n

2,00<\/p>\n<\/td>\n

\n

3,86<\/p>\n<\/td>\n

\n

22,14<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

5,90<\/p>\n<\/td>\n

\n

2,67<\/p>\n<\/td>\n

\n

4,32<\/p>\n<\/td>\n

\n

22,68<\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 4 loa\u0300i<\/td>\nRe g\u01b0\u0300ng<\/td>\n\n

5,82<\/p>\n<\/td>\n

\n

2,75<\/p>\n<\/td>\n

\n

4,09<\/p>\n<\/td>\n

\n

19,72<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

4,82<\/p>\n<\/td>\n

\n

2,30<\/p>\n<\/td>\n

\n

3,67<\/p>\n<\/td>\n

\n

20,98<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

5,20<\/p>\n<\/td>\n

\n

2,33<\/p>\n<\/td>\n

\n

3,83<\/p>\n<\/td>\n

\n

20,45<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

6,20<\/p>\n<\/td>\n

\n

2,75<\/p>\n<\/td>\n

\n

4,56<\/p>\n<\/td>\n

\n

19,62<\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 3 loa\u0300i<\/td>\nRe g\u01b0\u0300ng<\/td>\n\n

5,17<\/p>\n<\/td>\n

\n

2,23<\/p>\n<\/td>\n

\n

3,98<\/p>\n<\/td>\n

\n

18,09<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

4,40<\/p>\n<\/td>\n

\n

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

\n

3,31<\/p>\n<\/td>\n

\n

18,75<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

5,53<\/p>\n<\/td>\n

\n

2,6<\/p>\n<\/td>\n

\n

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

\n

17,89<\/p>\n<\/td>\n<\/tr>\n

 <\/td>\nS\u00f4\u0300i pha\u0309ng<\/td>\n\n

5,78<\/p>\n<\/td>\n

\n

2,6<\/p>\n<\/td>\n

\n

4,27<\/p>\n<\/td>\n

\n

20,22<\/p>\n<\/td>\n<\/tr>\n

Re g\u01b0\u0300ng<\/td>\n\n

5,60<\/p>\n<\/td>\n

\n

2,03<\/p>\n<\/td>\n

\n

4,02<\/p>\n<\/td>\n

\n

22,47<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

5,80<\/p>\n<\/td>\n

\n

2,85<\/p>\n<\/td>\n

\n

4,34<\/p>\n<\/td>\n

\n

19,29<\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 2 loa\u0300i<\/td>\nS\u00f4\u0300i pha\u0309ng<\/td>\n\n

5,25<\/p>\n<\/td>\n

\n

2,50<\/p>\n<\/td>\n

\n

3,85<\/p>\n<\/td>\n

\n

20,08<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

5,05<\/p>\n<\/td>\n

\n

2,30<\/p>\n<\/td>\n

\n

3,80<\/p>\n<\/td>\n

\n

19,30<\/p>\n<\/td>\n<\/tr>\n

 <\/td>\nRe g\u01b0\u0300ng<\/td>\n\n

4,85<\/p>\n<\/td>\n

\n

2,15<\/p>\n<\/td>\n

\n

3,62<\/p>\n<\/td>\n

\n

19,97<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

4,60<\/p>\n<\/td>\n

\n

2,70<\/p>\n<\/td>\n

\n

3,62<\/p>\n<\/td>\n

\n

18,79<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Th\u1ea3o lu\u1eadn:<\/p>\n

– Trong ca\u0301c c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n loa\u0300i De\u0309 \u0111o\u0309 la\u0300 loa\u0300i c\u00e2y tr\u00f4\u0300ng lu\u00f4n co\u0301 sinh tr\u00ad\u01b0\u01a1\u0309ng chi\u00ea\u0300u cao c\u01b0\u0323c \u0111a\u0323i l\u01a1\u0301n nh\u00e2\u0301t (tr\u01b0\u0300 \u01a1\u0309 c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n giao hai loa\u0300i S\u00f4\u0300i pha\u0309ng va\u0300 De\u0309 \u0111o\u0309)<\/p>\n

– V\u00ea\u0300 chi\u00ea\u0300u cao c\u01b0\u0323c ti\u00ea\u0309u thi\u0300: \u01a1\u0309 c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n giao 3, 4, 5 loa\u0300i Xoan \u0111a\u0300o la\u0300 th\u00e2\u0301p nh\u00e2\u0301t, \u01a1\u0309 c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n giao 3 loa\u0300i S\u00f4\u0300i pha\u0309ng + Re g\u01b0\u0300ng + De\u0309 \u0111o\u0309 thi\u0300 Re g\u01b0\u0300ng la\u0300 th\u00e2\u0301p nh\u00e2\u0301t.<\/p>\n

– H\u00ea\u0323 s\u00f4\u0301 bi\u00ea\u0301n \u0111\u00f4\u0323ng v\u00ea\u0300 sinh tr\u00ad\u01b0\u01a1\u0309ng chi\u00ea\u0300u cao kha\u0301 l\u01a1\u0301n. H\u00ea\u0323 s\u00f4\u0301 bi\u00ea\u0301n \u0111\u00f4\u0323ng chung cu\u0309a ca\u0301c loa\u0300i \u01a1\u0309 ca\u0301c c\u00f4ng th\u01b0\u0301c x\u00e2\u0301p xi\u0309 20%. Cao nh\u00e2\u0301t la\u0300 loa\u0300i De\u0309 \u0111o\u0309 \u01a1\u0309 c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n giao 5 loa\u0300i (22. 68%), th\u00e2\u0301p nh\u00e2\u0301t la\u0300 loa\u0300i Xoan \u0111a\u0300o \u01a1\u0309 c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n giao 3 loa\u0300i Re g\u01b0\u0300ng + Kha\u0301o va\u0300ng + Xoan \u0111a\u0300o(17.89%). \u0110i\u00ea\u0300u na\u0300y cho th\u00e2\u0301y ngay t\u01b0\u0300 \u0111\u00e2\u0300u ca\u0301c loa\u0300i c\u00e2y tr\u00f4\u0300ng r\u01b0\u0300ng \u0111a\u0303 b\u0103\u0301t \u0111\u00e2\u0300u bi\u0323 ph\u00e2n ho\u0301a v\u00ea\u0300 sinh tr\u01b0\u01a1\u0309ng chi\u00ea\u0300u cao. Theo chu\u0301ng t\u00f4i c\u00f3 3 nguy\u00ean nh\u00e2n l\u00e0 \u0110i\u0323a hi\u0300nh trong khu v\u01b0\u0323c co\u0301 bi\u00ea\u0301n \u0111\u00f4\u0323ng l\u01a1\u0301n; \u00a0C\u00e2y r\u01b0\u0300ng \u0111ang trong giai \u0111oa\u0323n pha\u0301t tri\u00ea\u0309n va\u0300 ph\u00e2n ho\u0301a ma\u0323nh Trong khi tuy\u00ea\u0309n cho\u0323n c\u00e2y \u0111em tr\u00f4\u0300ng ta m\u01a1\u0301i cho\u0323n \u0111\u00ad\u01b0\u01a1\u0323c \u0111\u00f4\u0300ng \u0111\u00ea\u0300u v\u00ea\u0300 ki\u00ea\u0309u hi\u0300nh ch\u01b0\u0301 ch\u00ad\u01b0a co\u0301 s\u01b0\u0323 \u0111\u00f4\u0300ng \u0111\u00ea\u0300u v\u00ea\u0300 ki\u00ea\u0309u gen. \u0110\u00e2y la\u0300 th\u01b0\u0323c ta\u0323i pha\u0309i ch\u00e2\u0301p nh\u00e2\u0323n khi s\u01b0\u0309 du\u0323ng c\u00e2y con t\u01b0\u0300 ha\u0323t \u0111\u00ea\u0309 tr\u00f4\u0300ng r\u01b0\u0300ng.<\/p>\n

b.2. Sinh tr\u00ad\u01b0\u01a1\u0309ng \u0111\u01b0\u01a1\u0300ng ki\u0301nh\u00a0 trong ca\u0301c m\u00f4 hi\u0300nh h\u00f4\u0303n loa\u0300i<\/b>:<\/p>\n

Cu\u0300ng v\u01a1\u0301i sinh tr\u01b0\u00ad\u01a1\u0309ng va\u0300 t\u0103ng tr\u01b0\u00ad\u01a1\u0309ng v\u00ea\u0300 chi\u00ea\u0300u cao, sinh tr\u01b0\u01a1\u0309ng va\u0300 t\u0103ng tr\u00ad\u01b0\u01a1\u0309ng v\u00ea\u0300 \u0111\u01b0\u01a1\u0300ng ki\u0301nh la\u0300 nh\u00e2n t\u00f4\u0301 quan tro\u0323ng a\u0309nh h\u00ad\u01b0\u01a1\u0309ng quy\u00ea\u0301t \u0111i\u0323nh \u0111\u00ea\u0301n t\u0103ng tr\u00ad\u01b0\u01a1\u0309ng v\u00ea\u0300 th\u00ea\u0309 ti\u0301ch c\u00e2y r\u01b0\u0300ng va\u0300 do \u0111o\u0301 a\u0309nh h\u00ad\u01b0\u01a1\u0309ng tr\u01b0\u0323c ti\u00ea\u0301p \u0111\u00ea\u0301n sa\u0309n l\u00ad\u01b0\u01a1\u0323ng r\u01b0\u0300ng. Tr\u00ean c\u01a1 s\u01a1\u0309 sinh tr\u01b0\u00ad\u01a1\u0309ng va\u0300 t\u0103ng tr\u01b0\u01a1\u0309ng v\u00ea\u0300 \u0111\u01b0\u00ad\u01a1\u0300ng ki\u0301nh co\u0301 th\u00ea\u0309 \u0111\u00ea\u0300 xu\u00e2\u0301t ca\u0301c bi\u00ea\u0323n pha\u0301p ky\u0303 thu\u00e2\u0323t l\u00e2m sinh \u0111u\u0301ng lu\u0301c va\u0300 co\u0301 hi\u00ea\u0323u qua\u0309 nh\u0103\u0300m \u0111i\u00ea\u0300u khi\u00ea\u0309n qua\u0301 tri\u0300nh sinh tr\u00ad\u01b0\u01a1\u0309ng cu\u0309a r\u01b0\u0300ng \u0111a\u0301p \u01b0\u0301ng mu\u0323c ti\u00eau kinh doanh. \u0110\u00ea\u0309 \u0111a\u0301nh gia\u0301 t\u00f4\u0301c \u0111\u00f4\u0323 sinh tr\u00ad\u01b0\u01a1\u0309ng v\u00ea\u0300 \u0111\u00ad\u01b0\u01a1\u0300ng ki\u0301nh, \u0111\u00ea\u0300 ta\u0300i s\u01b0\u0309 du\u0323ng ph\u00e2n c\u00e2\u0301p t\u0103ng tr\u01b0\u01a1\u0309ng \u0111\u00ad\u01b0\u01a1\u0300ng \u00a0ki\u0301nh cu\u0309a \u0110\u00f4\u0303 \u0110i\u0300nh S\u00e2m (2001):<\/p>\n

K\u00ea\u0301t qua\u0309 ti\u0301nh toa\u0301n ca\u0301c chi\u0309 ti\u00eau v\u00ea\u0300 sinh tr\u00ad\u01b0\u01a1\u0309ng \u0111\u01b0\u00ad\u01a1\u0300ng ki\u0301nh th\u00ea\u0309 hi\u00ea\u0323n \u01a1\u0309 bi\u1ec3u 2<\/p>\n

Bi\u1ec3u 2: Ca\u0301c chi\u0309 ti\u00eau v\u00ea\u0300 \u0111\u00ad\u01b0\u01a1\u0300ng ki\u0301nh cu\u0309a ca\u0301c loa\u0300i c\u00e2y 3 tu\u00f4\u0309i trong ca\u0301c m\u00f4 hi\u0300nh<\/strong><\/p>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

C\u00f4ng th\u01b0\u0301c thi\u0301 nghi\u00ea\u0323m<\/b><\/p>\n<\/td>\n

\n

Loa\u0300i c\u00e2y<\/b><\/p>\n<\/td>\n

\n

D1.3<\/sub>max (cm)<\/b><\/p>\n<\/td>\n

\n

D1.3<\/sub>mim (cm)<\/b><\/p>\n<\/td>\n

\u00a0(cm)<\/b><\/td>\nH\u00ea\u0323 s\u00f4\u0301 bi\u00ean v\u00ea\u0300 \u0111\u00ad\u01b0\u01a1\u0300ng ki\u0301nh<\/b><\/td>\n<\/tr>\n
H\u00f4\u0303n giao 5 loa\u0300i<\/td>\nS\u00f4\u0300i pha\u0309ng<\/td>\n\n

5,70<\/p>\n<\/td>\n

\n

2,67<\/p>\n<\/td>\n

\n

4,14<\/p>\n<\/td>\n

\n

19,64<\/p>\n<\/td>\n<\/tr>\n

Re g\u01b0\u0300ng<\/td>\n\n

4,93<\/p>\n<\/td>\n

\n

2,20<\/p>\n<\/td>\n

\n

3,76<\/p>\n<\/td>\n

\n

20,65<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

4,77<\/p>\n<\/td>\n

\n

2,20<\/p>\n<\/td>\n

\n

3,43<\/p>\n<\/td>\n

\n

22,00<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

5,00<\/p>\n<\/td>\n

\n

2,20<\/p>\n<\/td>\n

\n

3,62<\/p>\n<\/td>\n

\n

22,49<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

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

\n

2,67<\/p>\n<\/td>\n

\n

4,46<\/p>\n<\/td>\n

\n

22,15<\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 4 loa\u0300i<\/td>\nRe g\u01b0\u0300ng<\/td>\n\n

5,45<\/p>\n<\/td>\n

\n

2,23<\/p>\n<\/td>\n

\n

4,02<\/p>\n<\/td>\n

\n

20,84<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

4,70<\/p>\n<\/td>\n

\n

2,13<\/p>\n<\/td>\n

\n

3,53<\/p>\n<\/td>\n

\n

21,69<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

5,40<\/p>\n<\/td>\n

\n

2,50<\/p>\n<\/td>\n

\n

4,00<\/p>\n<\/td>\n

\n

20,27<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

5,65<\/p>\n<\/td>\n

\n

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

\n

4,20<\/p>\n<\/td>\n

\n

21,90<\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 3 loa\u0300i<\/td>\nRe g\u01b0\u0300ng<\/td>\n\n

5,00<\/p>\n<\/td>\n

\n

2,07<\/p>\n<\/td>\n

\n

3,77<\/p>\n<\/td>\n

\n

18,86<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

4,20<\/p>\n<\/td>\n

\n

1,93<\/p>\n<\/td>\n

\n

3,31<\/p>\n<\/td>\n

\n

19,88<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

5,20<\/p>\n<\/td>\n

\n

2,37<\/p>\n<\/td>\n

\n

4,06<\/p>\n<\/td>\n

\n

18,16<\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 3 loa\u0300i<\/td>\nS\u00f4\u0300i pha\u0309ng<\/td>\n\n

5,78<\/p>\n<\/td>\n

\n

2,60<\/p>\n<\/td>\n

\n

4,03<\/p>\n<\/td>\n

\n

20,97<\/p>\n<\/td>\n<\/tr>\n

Re g\u01b0\u0300ng<\/td>\n\n

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

\n

2,20<\/p>\n<\/td>\n

\n

3,77<\/p>\n<\/td>\n

\n

22,24<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

5,80<\/p>\n<\/td>\n

\n

2,83<\/p>\n<\/td>\n

\n

4,10<\/p>\n<\/td>\n

\n

19,92<\/p>\n<\/td>\n<\/tr>\n

H\u00f4\u0303n giao 2 loa\u0300i<\/td>\nS\u00f4\u0300i pha\u0309ng<\/td>\n\n

5,23<\/p>\n<\/td>\n

\n

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

\n

4,08<\/p>\n<\/td>\n

\n

17,79<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

4,90<\/p>\n<\/td>\n

\n

2,55<\/p>\n<\/td>\n

\n

3,89<\/p>\n<\/td>\n

\n

18,27<\/p>\n<\/td>\n<\/tr>\n

 <\/td>\nRe g\u01b0\u0300ng<\/td>\n\n

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

\n

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

\n

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

\n

19,79<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

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

\n

2,55<\/p>\n<\/td>\n

\n

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

\n

16,37<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Th\u1ea3o lu\u1eadn:<\/p>\n

V\u1ec1 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u1ef1c \u0111\u1ea1i<\/i>:<\/p>\n

C\u00f4ng th\u1ee9c h\u1ed7n giao 5 lo\u00e0i th\u00ec S\u1ed3i ph\u1ea3ng \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 max cao nh\u1ea5t, m\u00f4 h\u00ecnh 4 lo\u00e0i th\u00ec D\u1ebb \u00a0\u0111\u1ecf \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 max cao nh\u1ea5t. \u1ede\u00a0 m\u00f4 h\u00ecnh h\u1ed7n giao 3 lo\u00e0i (Re g\u1eebng + Xoan \u0111\u00e0o+ Kh\u00e1o v\u00e0ng)th\u00ec \u00a0Xoan \u0111\u00e0o \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 max cao nh\u1ea5t. \u1ede m\u00f4 h\u00ecnh h\u1ed7n giao 3 lo\u00e0i (Re g\u1eebng + S\u1ed3i \u00a0ph\u1ea3ng + D\u1ebb \u0111\u1ecf)th\u00ec D\u1ebb \u0111\u1ecf \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 max cao nh\u1ea5t. \u1ede m\u00f4 h\u00ecnh h\u1ed7n giao 2 lo\u00e0i(Re g\u1eebng + Xoan \u0111\u00e0o) th\u00ec\u00a0 Re g\u1eebng \u00a0\u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 max cao nh\u1ea5t. \u1ede\u00a0 m\u00f4 h\u00ecnh h\u1ed7n giao 2 lo\u00e0i(S\u1ed3i \u00a0ph\u1ea3ng + D\u1ebb \u0111\u1ecf) th\u00ec S\u1ed3i ph\u1ea3ng \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 max cao nh\u1ea5t.<\/p>\n

V\u1ec1 sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u1ef1c ti\u1ec3u<\/i>:<\/p>\n

C\u00f4ng th\u1ee9c h\u1ed7n giao 5 lo\u00e0i th\u00ec Re g\u1eebng; Xoan \u0111\u00e0o; Kh\u00e1o v\u00e0ng \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 min th\u1ea5p nh\u1ea5t. M\u00f4 h\u00ecnh 4 lo\u00e0i th\u00ec Kh\u00e1o v\u00e0ng \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 min \u00a0th\u1ea5p nh\u1ea5t. \u1ede m\u00f4 h\u00ecnh 3 lo\u00e0i (Re g\u1eebng + Xoan \u0111\u00e0o+ Kh\u00e1o v\u00e0ng)th\u00ec Kh\u00e1o v\u00e0ng \u0111\u1ea1t gi\u00e1 tr\u1ecbD1..3 min\u00a0 th\u1ea5p nh\u1ea5t. \u1ede m\u00f4 h\u00ecnh 3 lo\u00e0i (Re g\u1eebng + S\u1ed3i \u00a0ph\u1ea3ng + D\u1ebb \u0111\u1ecf) th\u00ec Re g\u1eebng \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 min\u00a0 th\u1ea5p nh\u1ea5t. \u00a0\u1ede \u00a0m\u00f4 h\u00ecnh 2 lo\u00e0i (S\u1ed3i \u00a0ph\u1ea3ng + D\u1ebb \u0111\u1ecf)th\u00ec\u00a0 S\u1ed3i \u00a0ph\u1ea3ng \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 min th\u1ea5p nh\u1ea5t. \u1ede m\u00f4 h\u00ecnh 2 lo\u00e0i (Re g\u1eebng + Xoan \u0111\u00e0o)th\u00ec\u00a0 Re g\u1eebng \u0111\u1ea1t gi\u00e1 tr\u1ecb D1..3 min th\u1ea5p nh\u1ea5t.<\/p>\n

– Cu\u0303ng nh\u01b0 \u00ad h\u00ea\u0323 s\u00f4\u0301 bi\u00ea\u0301n \u0111\u00f4\u0323ng v\u00ea\u0300 sinh tr\u01b0\u00ad\u01a1\u0309ng chi\u00ea\u0300u cao, h\u00ea\u0323 s\u00f4\u0301 bi\u00ea\u0301n \u0111\u00f4\u0323ng v\u00ea\u0300 sinh tr\u00ad\u01b0\u01a1\u0309ng<\/p>\n

\u0111\u01b0\u01a1\u0300ng ki\u0301nh kha\u0301 l\u01a1\u0301n. H\u00ea\u0323 s\u00f4\u0301 bi\u00ea\u0301n \u0111\u00f4\u0323ng chung cu\u0309a ca\u0301c loa\u0300i \u01a1\u0309 ca\u0301c c\u00f4ng th\u01b0\u0301c x\u00e2\u0301p xi\u0309 20%. Cao nh\u00e2\u0301t la\u0300 loa\u0300i Xoan \u0111a\u0300o \u01a1\u0309 c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n giao 5 loa\u0300i (22.49%), th\u00e2\u0301p nh\u00e2\u0301t la\u0300 loa\u0300i Xoan \u0111a\u0300o \u01a1\u0309 c\u00f4ng th\u01b0\u0301c h\u00f4\u0303n giao 2 loa\u0300i Re g\u01b0\u0300ng + Xoan \u0111a\u0300o (16.37%). \u0110i\u00ea\u0300u na\u0300y cho th\u00e2\u0301y ngay t\u01b0\u0300 \u0111\u00e2\u0300u ca\u0301c loa\u0300i c\u00e2y tr\u00f4\u0300ng r\u01b0\u0300ng \u0111a\u0303 b\u0103\u0301t \u0111\u00e2\u0300u bi\u0323 ph\u00e2n ho\u0301a v\u00ea\u0300 sinh tr\u01b0\u01a1\u0309ng \u0111\u01b0\u01a1\u0300ng ki\u0301nh ch\u01b0\u0301 kh\u00f4ng nh\u00e2\u0301t thi\u00ea\u0301t la\u0300 khi r\u01b0\u0300ng khe\u0301p ta\u0301n m\u01a1\u0301i co\u0301 s\u01b0\u0323 ph\u00e2n ho\u0301a. Nguy\u00ean nh\u00e2n co\u0301 th\u00ea\u0309 gi\u00f4\u0301ng nh\u00ad nguy\u00ean nh\u00e2n ph\u00e2n ho\u0301a v\u00ea\u0300 chi\u00ea\u0300u cao \u0111a\u0303 n\u00eau \u01a1\u0309 tr\u00ean.<\/b><\/p>\n

b.3.<\/b><\/p>\n

\u00a0T\u0103ng tr\u01b0\u00ad\u1edfng v\u1ec1 \u0111\u00ad\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao trong c\u00e1c m\u00f4 h\u00ecnh h\u1ed7n lo\u00e0i: <\/i><\/p>\n

\u0110\u1ec1 t\u00e0i ch\u1ecdn ch\u1ec9 ti\u00eau t\u0103ng tr\u01b0\u00ad\u1edfng b\u00ecnh qu\u00e2n chung(Dt) \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u0103ng tr\u01b0\u00ad\u1edfng c\u1ee7a c\u00e1c<\/p>\n

lo\u00e0i c\u00e2y tr\u1ed3ng.<\/p>\n

+ T\u0103ng tr\u00ad\u01b0\u1edfng v\u1ec1 \u0111\u00ad\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y 3 tu\u1ed5i\u00a0 trong\u00a0 m\u00f4 h\u00ecnh<\/i><\/p>\n

Bi\u1ec3u 3: L\u01b0\u01a1\u0323ng t\u0103ng tr\u01b0\u01a1\u0309ng v\u00ea\u0300 D va\u0300 H cu\u0309a ca\u0301c loa\u0300i c\u00e2y 3 tu\u00f4\u0309i trong m\u00f4 hi\u0300nh 5 lo\u00e0i<\/b><\/p>\n

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

Loa\u0300i<\/b><\/p>\n

C\u00e2y<\/b><\/p>\n<\/td>\n

\n

T\u0103ng tr\u01b0\u01a1\u0309ng h\u0103\u0300ng n\u0103m v\u00ea\u0300 \u0111\u01b0\u01a1\u0300ng ki\u0301nh Do<\/sub>(Cm)<\/b><\/p>\n<\/td>\n

\n

D<\/b>D<\/b><\/p>\n

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

\n

T\u0103ng tr\u01b0\u01a1\u0309ng h\u0103\u0300ng n\u0103m v\u00ea\u0300 \u0111\u01b0\u01a1\u0300ng ki\u0301nh H (m)<\/b><\/p>\n<\/td>\n

\n

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

(m)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

S\u00f4\u0300i Pha\u0309ng<\/td>\n\n

1,22<\/p>\n<\/td>\n

\n

1,36<\/p>\n<\/td>\n

\n

1,56<\/p>\n<\/td>\n

\n

1,38<\/p>\n<\/td>\n

\n

1,35<\/p>\n<\/td>\n

\n

1,48<\/p>\n<\/td>\n

\n

1,58<\/p>\n<\/td>\n

\n

1,47<\/p>\n<\/td>\n<\/tr>\n

Re g\u01b0\u0300ng<\/td>\n\n

1,18<\/p>\n<\/td>\n

\n

1,43<\/p>\n<\/td>\n

\n

1,15<\/p>\n<\/td>\n

\n

1,25<\/p>\n<\/td>\n

\n

1,15<\/p>\n<\/td>\n

\n

1,21<\/p>\n<\/td>\n

\n

1,19<\/p>\n<\/td>\n

\n

1,18<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

1,09<\/p>\n<\/td>\n

\n

1,15<\/p>\n<\/td>\n

\n

1,19<\/p>\n<\/td>\n

\n

1,14<\/p>\n<\/td>\n

\n

1,15<\/p>\n<\/td>\n

\n

1,24<\/p>\n<\/td>\n

\n

1,36<\/p>\n<\/td>\n

\n

1,25<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

1,18<\/p>\n<\/td>\n

\n

1,50<\/p>\n<\/td>\n

\n

0,94<\/p>\n<\/td>\n

\n

1,21<\/p>\n<\/td>\n

\n

1,29<\/p>\n<\/td>\n

\n

1,57<\/p>\n<\/td>\n

\n

1,00<\/p>\n<\/td>\n

\n

1,29<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

1,25<\/p>\n<\/td>\n

\n

1,57<\/p>\n<\/td>\n

\n

1,64<\/p>\n<\/td>\n

\n

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

\n

1,41<\/p>\n<\/td>\n

\n

1,63<\/p>\n<\/td>\n

\n

1,28<\/p>\n<\/td>\n

\n

1,44<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Th\u1ea3o lu\u1eadn:<\/p>\n

– T\u0103ng tr\u00ad\u01b0\u1edfng v\u1ec1 \u0111\u00ad\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e1c lo\u00e0i ch\u1ecdn \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u1ec1u thu\u1ed9c c\u1ea5p sinh tr\u01b0\u00ad\u1edfng nhanh. Trong \u0111\u00f3 nhanh nh\u1ea5t l\u00e0 D\u1ebb \u0111\u1ecf(1.49cm), th\u1ea5p nh\u1ea5t l\u00e0 Kh\u00e1o v\u00e0ng(1.14cm).<\/p>\n

– T\u0103ng tr\u00ad\u01b0\u1edfng v\u1ec1 chi\u1ec1u cao c\u1ee7a c\u00e1c lo\u00e0i ch\u1ecdn \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u1ec1u thu\u1ed9c c\u1ea5p sinh tr\u01b0\u1edfng nhanh(>1m\/n\u0103m). Trong \u0111\u00f3 nhanh nh\u1ea5t l\u00e0 S\u1ed3i ph\u1ea3ng (1.47m), ch\u1eadm nh\u1ea5t l\u00e0 Kh\u00e1o v\u00e0ng(1.1m).<\/p>\n

+T\u0103ng tr\u01b0\u00ad\u1edfng v\u1ec1 \u0111\u01b0\u00ad\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y 3 tu\u1ed5i\u00a0 trong\u00a0 m\u00f4 h\u00ecnh <\/i><\/p>\n

Bi\u1ec3u 4: L\u01b0\u01a1\u0323ng t\u0103ng tr\u01b0\u01a1\u0309ng v\u00ea\u0300 D va\u0300 H cu\u0309a ca\u0301c loa\u0300i c\u00e2y 3 tu\u00f4\u0309itrong m\u00f4 hi\u0300nh\u00a0 4 loa\u0300i <\/b><\/p>\n

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

Loa\u0300i<\/b><\/p>\n

C\u00e2y<\/b><\/p>\n<\/td>\n

\n

T\u0103ng tr\u01b0\u01a1\u0309ng h\u0103\u0300ng n\u0103m v\u00ea\u0300 \u0111\u01b0\u01a1\u0300ng ki\u0301nh Do(Cm)<\/b><\/p>\n<\/td>\n

\n

D<\/b>D<\/b><\/p>\n

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

\n

T\u0103ng tr\u01b0\u01a1\u0309ng h\u0103\u0300ng n\u0103m v\u00ea\u0300 \u0111\u01b0\u01a1\u0300ng ki\u0301nh H (m)<\/b><\/p>\n<\/td>\n

\n

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

(m)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

Re g\u01b0\u0300ng<\/td>\n\n

1,00<\/p>\n<\/td>\n

\n

0,92<\/p>\n<\/td>\n

\n

2,10<\/p>\n<\/td>\n

\n

1,34<\/p>\n<\/td>\n

\n

1,07<\/p>\n<\/td>\n

\n

1,08<\/p>\n<\/td>\n

\n

1,94<\/p>\n<\/td>\n

\n

1,36<\/p>\n<\/td>\n<\/tr>\n

Kha\u0301o va\u0300ng<\/td>\n\n

1,00<\/p>\n<\/td>\n

\n

1,06<\/p>\n<\/td>\n

\n

1,47<\/p>\n<\/td>\n

\n

1,18<\/p>\n<\/td>\n

\n

1,09<\/p>\n<\/td>\n

\n

1,13<\/p>\n<\/td>\n

\n

1,45<\/p>\n<\/td>\n

\n

1,22<\/p>\n<\/td>\n<\/tr>\n

Xoan \u0111a\u0300o<\/td>\n\n

1,14<\/p>\n<\/td>\n

\n

1,12<\/p>\n<\/td>\n

\n

1,74<\/p>\n<\/td>\n

\n

1,33<\/p>\n<\/td>\n

\n

1,26<\/p>\n<\/td>\n

\n

1,16<\/p>\n<\/td>\n

\n

1,41<\/p>\n<\/td>\n

\n

1,28<\/p>\n<\/td>\n<\/tr>\n

De\u0309 \u0111o\u0309<\/td>\n\n

1,18<\/p>\n<\/td>\n

\n

1,17<\/p>\n<\/td>\n

\n

1,85<\/p>\n<\/td>\n

\n

1,40<\/p>\n<\/td>\n

\n

1,29<\/p>\n<\/td>\n

\n

1,25<\/p>\n<\/td>\n

\n

2,02<\/p>\n<\/td>\n

\n

1,52<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Th\u1ea3o lu\u1eadn:<\/p>\n

– T\u0103ng tr\u01b0\u00ad\u1edfng v\u1ec1 \u0111\u00ad\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e1c lo\u00e0i ch\u1ecdn \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u1ec1u thu\u1ed9c c\u1ea5p sinh tr\u00ad\u01b0\u1edfng nhanh. Trong \u0111\u00f3 nhanh nh\u1ea5t l\u00e0 D\u1ebb \u0111\u1ecf(1.40cm), ch\u1eadm nh\u1ea5t l\u00e0 Kh\u00e1o v\u00e0ng(1.18cm).<\/p>\n

– T\u0103ng tr\u01b0\u00ad\u1edfng v\u1ec1 chi\u1ec1u cao c\u1ee7a c\u00e1c lo\u00e0i ch\u1ecdn \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u1ec1u thu\u1ed9c c\u1ea5p sinh tr\u01b0\u1edfng nhanh(>1m\/n\u0103m).Trong \u0111\u00f3 nhanh nh\u1ea5t l\u00e0 D\u1ebb \u0111\u1ecf(1.52m),ch\u1eadm nh\u1ea5t l\u00e0 Kh\u00e1o v\u00e0ng(1.22m).<\/p>\n

+T\u0103ng tr\u01b0\u00ad\u1edfng v\u1ec1 \u0111\u01b0\u00ad\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y 3 tu\u1ed5i\u00a0 trong\u00a0 m\u00f4 h\u00ecnh <\/i><\/p>\n

Bi\u1ec3u 5: L\u01b0\u01a1\u0323ng t\u0103ng tr\u01b0\u01a1\u0309ng v\u00ea\u0300 D va\u0300 H cu\u0309a ca\u0301c loa\u0300i c\u00e2y 3 tu\u00f4\u0309i trong m\u00f4 hi\u0300nh\u00a0 3 loa\u0300i <\/b><\/p>\n

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

Loa\u0300i<\/b><\/p>\n

C\u00e2y<\/b><\/p>\n<\/td>\n

\n

T\u0103ng tr\u01b0\u01a1\u0309ng h\u0103\u0300ng n\u0103m v\u00ea\u0300 \u0111\u01b0\u01a1\u0300ng ki\u0301nh D1.3<\/sub>(Cm)<\/b><\/p>\n<\/td>\n

\n

D<\/b>D<\/b><\/p>\n

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

\n

T\u0103ng tr\u01b0\u01a1\u0309ng h\u0103\u0300ng n\u0103m v\u00ea\u0300 chi\u00ea\u0300u cao H (m)<\/b><\/p>\n<\/td>\n

\n

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

(m)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

\n

Tu\u00f4\u0309i<\/p>\n

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

S\u00f4\u0300i Pha\u0309ng<\/td>\n1,25<\/td>\n1,14<\/td>\n1,64<\/td>\n1,34<\/td>\n1,39<\/td>\n1,21<\/td>\n1,67<\/td>\n1,42<\/td>\n<\/tr>\n
Re g\u01b0\u0300ng<\/td>\n1,15<\/td>\n0,88<\/td>\n1,74<\/td>\n1,26<\/td>\n1,22<\/td>\n1,16<\/td>\n1,64<\/td>\n1,34<\/td>\n<\/tr>\n
De\u0309 \u0111o\u0309<\/td>\n1,20<\/td>\n1,27<\/td>\n1,63<\/td>\n1,37<\/td>\n1,32<\/td>\n1,39<\/td>\n1,63<\/td>\n1,45<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

– T\u0103ng tr\u00ad\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u00ad\u1eddng k\u00ednh chi\u1ec1u cao c\u1ee7a c\u00e1c lo\u00e0i ch\u1ecdn \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u1ec1u thu\u1ed9c c\u1ea5p sinh tr\u00ad\u01b0\u1edfng nhanh(>1m\/n\u0103m, >1cm\/ n\u0103m). Trong \u0111\u00f3 nhanh nh\u1ea5t l\u00e0 D\u1ebb \u0111\u1ecf(1.45m, 1.37cm), ch\u1eadm nh\u1ea5t l\u00e0 Re g\u1eebng(1.34m, 1.26cm).<\/p>\n

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

1. Vi\u1ec7c ch\u1ecdn \u0111\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u(khu v\u1ef1c C\u1ea7u Hai v\u00e0 khu v\u1ef1c L\u01b0\u00ad\u01a1ng Th\u1ecbnh) ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i c\u1ee7a c\u1ee7a c\u00e1c lo\u00e0i l\u1ef1a ch\u1ecdn g\u00e2y tr\u1ed3ng nghi\u00ean c\u1ee9u th\u00ed nghi\u1ec7m.<\/p>\n

2..C\u00e1c lo\u00e0i c\u00e2y s\u1eed d\u1ee5ng trong vi\u1ec7c x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u1ec1u l\u00e0 c\u00e2y c\u00f3 ph\u00e2n b\u1ed1 r\u1ed9ng, c\u00f3 m\u1eb7t \u1edf h\u1ea7u h\u1ebft c\u00e1c r\u1eebng th\u1ee9 sinh \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u v\u00e0 c\u00e1c \u0111\u1ecba ph\u01b0\u00ad\u01a1ng l\u00e2n c\u1eadn, th\u00edch nghi v\u1edbi nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba.<\/p>\n

3. C\u00e1c lo\u00e0i s\u1eed d\u1ee5ng \u0111\u1ec1u l\u00e0 c\u00e1c lo\u00e0i c\u00e2y sinh tr\u01b0\u00ad\u1edfng kh\u00e1 nhanh, t\u00e1n r\u1eadm\u00a0 th\u00ad\u01b0\u1eddng xanh. V\u1ec1 c\u00f4ng d\u1ee5ng c\u00e1c lo\u00e0i \u0111\u1ec1u cho s\u1ea3n ph\u1ea9m g\u1ed7 t\u1ed1t, \u0111\u00ad\u01b0\u1ee3c nh\u00e2n d\u00e2n \u00ad s\u1eed d\u1ee5ng t\u1eeb l\u00e2u \u0111\u1eddi. Hi\u1ec7n nay ch\u00fang \u0111\u01b0\u00ad\u1ee3c d\u00f9ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c cao c\u1ea5p ph\u1ee5c v\u1ee5 n\u1ed9i ti\u00eau v\u00e0 xu\u1ea5t kh\u1ea9u. Ngo\u00e0i ra m\u1ed9t s\u1ed1 lo\u00e0i nh\u01b0\u00ad Re g\u1eebng, Kh\u00e1o v\u00e0ng\u2026 c\u00f2n cho s\u1ea3n ph\u1ea9m ph\u1ee5 ( tinh d\u1ea7u, nh\u1ef1a ) l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t thu\u1ed1c ch\u1eefa b\u1ec7nh.<\/p>\n

4. C\u00e1c lo\u00e0i c\u00e2y trong c\u00e1c m\u00f4 h\u00ecnh \u0111\u1ec1u c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng cao.C\u00e2y D\u1ebb \u0111\u1ecf, S\u1ed3i ph\u1ea3ng,Xoan \u0111\u00e0o, Re g\u1eebng sinh tr\u00ad\u01b0\u1edfng\u00a0 nhanh v\u00e0 \u1ed5n \u0111\u1ecbnh. C\u00e2y Kh\u00e1o v\u00e0ng sinh tr\u00ad\u01b0\u1edfng ch\u1eadm h\u01a1n 4 lo\u00e0i tr\u00ean nh\u00ad\u01b0ng c\u0169ng l\u00e0 lo\u00e0i\u00a0 sinh tr\u01b0\u00ad\u1edfng nhanh v\u00e0 t\u01b0\u00ad\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh. \u0110\u1ec1 t\u00e0i \u0111\u00e3 x\u00e2y d\u1ef1ng \u00a0\u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng 5 lo\u00e0i c\u00e2y.C\u00e1c lo\u00e0i c\u00e2y n\u00e0y c\u00f3 th\u1ec3 \u0111\u1ea7u t\u00ad\u01b0 \u0111\u1ec3 t\u1eadp hu\u1ea5n k\u1ef9 thu\u1eadt v\u00e0 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh tr\u00ecnh di\u1ec5n v\u00e0 ph\u00e1t tri\u1ec3n tr\u00ean di\u1ec7n r\u1ed9ng trong s\u1ea3n xu\u1ea5t g\u1ed7 l\u1edbn.<\/p>\n

V. T\u00e0i li\u1ec7u \u00a0tham kh\u1ea3o.<\/b><\/p>\n

1. Nguy\u1ec5n B\u00e1 Ch\u1ea5t , Ho\u00e0ng V\u0103n Th\u1eafng (2005) B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i \u201c Nghi\u00ean c\u1ee9u x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng h\u1ed7n giao b\u1eb1ng m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba tr\u00ean \u0111\u1ea5t r\u1eebng tho\u00e1i ho\u00e1 \u00b8 \u1edf\u00a0 c\u00e1c t\u1ec9nh mi\u1ec1n\u00a0 b\u1eafc \u201d.<\/p>\n

2. H\u00e0 Th\u1ecb M\u1eebng ( 2009) B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i \u201cNghi\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\u201d<\/i><\/p>\n

3. Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a – S\u1eed d\u1ee5ng c\u00e2y b\u1ea3n \u0111\u1ecba trong tr\u1ed3ng r\u1eebng.<\/p>\n

4. Nguy\u1ec5n Xu\u00e2n Qu\u00e1t (1985) b\u01b0\u1edbc \u0111\u1ea7u x\u00e1c \u0111\u1ecbnh c\u00e2y tr\u1ed3ng cho v\u00f9ng kinh t\u1ebf L\u00e2m nghi\u1ec7p.<\/p>\n

5.. Nguy\u1ec5n V\u0103n Th\u00f4ng (2001), K\u1ebft qu\u1ea3 ph\u1ee5c h\u1ed3i r\u1eebng t\u1ea1i Trung t\u00e2m Nghi\u00ean c\u00fau th\u1ef1c nghi\u1ec7m L\u00e2m sinh C\u1ea7u Hai – Ph\u00fa Th\u1ecd nghi\u00ean c\u1ee9u r\u1eebng t\u1ef1 nhi\u00ean, Nxb th\u1ed1ng k\u00ea H\u00e0 N\u1ed9i.<\/p>\n","protected":false},"excerpt":{"rendered":"

Nguy\u1ec5n Th\u1ecb Nhung v\u00e0 c\u1ed9ng s\u1ef1 \u00a0 1.\u0110\u1eb6T V\u1ea4N \u0110\u1ec0 V\u00f9ng Trung t\u00e2m B\u1eafc B\u1ed9 l\u00e0 m\u1ed9t trong 9 v\u00f9ng sinh th\u00e1i l\u00e2m nghi\u1ec7p. Di\u1ec7n t\u00edch to\u00e0n v\u00f9ng chi\u1ebfm kho\u1ea3ng 1\/3 di\u1ec7n t\u00edch mi\u1ec1n n\u00fai ph\u00eda B\u1eafc v\u00e0 kho\u1ea3ng 1\/10 di\u1ec7n t\u00edch c\u1ea3 n\u00ad\u01b0\u1edbc v\u1edbi t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng v\u00e0 \u0111\u1ea5t l\u00e0 2.267.597ha. Trong \u0111\u00f3 […]<\/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\/14534"}],"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=14534"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14534\/revisions"}],"predecessor-version":[{"id":14539,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14534\/revisions\/14539"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=14534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=14534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=14534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}