{"id":8790,"date":"2005-11-16T23:24:17","date_gmt":"2005-11-16T16:24:17","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2005\/11\/ket-qua-de-tai-nghien-cuu-trong-rung-tram-trang-canarium-album-raeusch-lam-nguyen-lieu-go-dan-1995-1999\/"},"modified":"2013-10-06T09:00:32","modified_gmt":"2013-10-06T02:00:32","slug":"ket-qua-de-tai-nghien-cuu-trong-rung-tram-trang-canarium-album-raeusch-lam-nguyen-lieu-go-dan-1995-1999","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-de-tai-nghien-cuu-trong-rung-tram-trang-canarium-album-raeusch-lam-nguyen-lieu-go-dan-1995-1999\/","title":{"rendered":"K\u1ebft qu\u1ea3 \u0111\u1ec1 t\u00e0i-“nghi\u00ean c\u1ee9u tr\u1ed3ng r\u1eebng Tr\u00e1m tr\u1eafng (Canarium album Raeusch) l\u00e0m nguy\u00ean li\u1ec7u g\u1ed7 d\u00e1n (1995-1999)”"},"content":{"rendered":"

Ch\u1ee7 nhi\u1ec7m \u0111\u1ec1 t\u00e0i:Ph\u1ea1m \u0110\u00ecnh Tam <\/p>\n

C\u1ed9ng t\u00e1c vi\u00ean ch\u00ednh: <\/p>\n

Tr\u1ea7n L\u00e2m \u0110\u1ed3ng, Nguy\u1ec5n S\u1ef9 \u0110\u01b0\u01a1ng <\/p>\n

Vi\u1ec7n KHLN Vi\u1ec7t Nam <\/p>\n<\/p>\n

I.m\u1edf \u0111\u1ea7u<\/h1>\n

Tr\u00e1m tr\u1eafng (Canarium album<\/i> Raeusch) l\u00e0 c\u00e2y g\u1ed7 b\u1ea3n \u0111\u1ecba c\u00f3 chi\u1ec1u cao t\u1eeb 20 – 30m, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 50 – 70m, th\u00e2n tr\u00f2n th\u1eb3ng, t\u00e1n r\u1ed9ng v\u00e0 l\u00e1 xanh quanh n\u0103m. Tr\u00e1m tr\u1eafng l\u00e0 c\u00e2y \u0111a m\u1ee5c \u0111\u00edch \u0111\u01b0\u1ee3c nh\u00e2n d\u00e2n ta \u01b0a chu\u1ed9ng. <\/p>\n

G\u1ed7 Tr\u00e1m tr\u1eafng m\u1ec1m, nh\u1eb9 th\u1edb m\u1ecbn, d\u1ec5 b\u00f3c th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m nguy\u00ean li\u1ec7u g\u1ed7 d\u00e1n, \u0111\u00f3ng \u0111\u1ed3 th\u00f4ng th\u01b0\u1eddng, d\u00f9ng trong x\u00e2y d\u1ef1ng nh\u00e0 c\u1eeda. <\/p>\n

Nh\u1ef1a Tr\u00e1m d\u00f9ng trong c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn x\u00e0 ph\u00f2ng, n\u01b0\u1edbc hoa, s\u01a1n t\u1ed5ng h\u1ee3p, l\u00e0m ch\u1ea5t c\u00e1ch \u0111i\u1ec7n. Qu\u1ea3 Tr\u00e1m \u0103n \u0111\u01b0\u1ee3c, c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 ch\u1ebf bi\u1ebfn \u00f4 mai, l\u00e0m th\u1ef1c ph\u1ea9m, l\u00e0m thu\u1ed1c ch\u1eefa ho v\u00e0 gi\u1ea3i \u0111\u1ed9c. <\/p>\n

C\u00e2y Tr\u00e1m tr\u1eafng \u0111\u00e3 \u0111\u01b0\u1ee3c nhi\u1ec1u nh\u00e0 khoa h\u1ecdc trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc nghi\u00ean c\u1ee9u t\u1eeb nh\u1eefng n\u0103m \u0111\u1ea7u th\u1ebf k\u1ef7 20. C\u00e1c nghi\u00ean c\u1ee9u ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o c\u00e1c l\u0129nh v\u1ef1c: ph\u00e2n lo\u1ea1i; ch\u1ebf bi\u1ebfn v\u00e0 khai th\u00e1c qu\u1ea3, nh\u1ef1a; k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng. Tuy nhi\u00ean cho \u0111\u1ebfn nay c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt L\u00e2m sinh \u0111\u1ec3 g\u00e2y tr\u1ed3ng v\u00e0 ph\u00e1t tri\u1ec3n v\u1eabn c\u00f2n r\u1ea5t h\u1ea1n ch\u1ebf, \u0111\u1eb7c bi\u1ec7t l\u00e0 l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng, bi\u1ec7n ph\u00e1p x\u1eed l\u00fd th\u1ef1c b\u00ec v\u00e0 ch\u1ecdn c\u00e2y ph\u00f9 tr\u1ee3,\u2026 t\u1eeb \u0111\u00f3 c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng Tr\u00e1m tr\u1eafng tr\u00ean th\u1ef1c \u0111\u1ecba kh\u00f4ng m\u1ea5y th\u00e0nh c\u00f4ng. Trong khi \u0111\u00f3 Tr\u00e1m tr\u1eafng l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2y \u0111a m\u1ee5c \u0111\u00edch \u0111\u01b0\u1ee3c nh\u00e2n d\u00e2n \u01b0a chu\u1ed9ng, kh\u00f4ng nh\u1eefng c\u00e1c c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t ch\u1ebf bi\u1ebfn g\u1ed7 c\u00f3 nhu c\u1ea7u s\u1eed d\u1ee5ng g\u1ed7 Tr\u00e1m m\u00e0 c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng c\u0169ng mong mu\u1ed1n ph\u00e1t tri\u1ec3n tr\u1ed3ng r\u1eebng Tr\u00e1m tr\u1eafng. <\/p>\n

V\u1edbi l\u1ebd \u0111\u00f3, B\u1ed9 L\u00e2m nghi\u1ec7p nay l\u00e0 B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n \u0111\u00e3 ph\u00ea duy\u1ec7t \u0111\u1ec1 t\u00e0i: “Nghi\u00ean c\u1ee9u tr\u1ed3ng r\u1eebng Tr\u00e1m tr\u1eafng (Canarium album<\/i> Raeusch) l\u00e0m nguy\u00ean li\u1ec7u g\u1ed7 d\u00e1n”. \u0110\u1ec1 t\u00e0i do Vi\u1ec7n Khoa H\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam ch\u1ee7 tr\u00ec th\u1ef1c hi\u1ec7n t\u1eeb 1995 \u0111\u1ebfn 1999 v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c H\u1ed9i \u0110\u1ed3ng khoa h\u1ecdc \u0111\u00e1nh gi\u00e1 l\u00e0 th\u00e0nh c\u00f4ng. <\/p>\n

II.M\u1ee5c ti\u00eau, n\u1ed9i dung v\u00e0 Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/h2>\n

2.1. M\u1ee5c ti\u00eau nghi\u00ean c\u1ee9u<\/b> <\/p>\n

– X\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u01a1 s\u1edf khoa h\u1ecdc \u0111\u1ec3 \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p l\u00e2m sinh ph\u00f9 h\u1ee3p g\u00e2y tr\u1ed3ng v\u00e0 ph\u00e1t tri\u1ec3n c\u00e2y Tr\u00e1m tr\u1eafng. <\/p>\n

– \u0110\u1ec1 xu\u1ea5t \u0111\u01b0\u1ee3c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt sinh \u0111\u1ec3 tr\u1ed3ng r\u1eebng tr\u00e1m tr\u1eafng ph\u1ee5c v\u1ee5 m\u1ee5c ti\u00eau cung c\u1ea5p g\u1ed7 cho c\u00f4ng nghi\u1ec7p d\u00e1n l\u1ea1ng. <\/p>\n

– G\u00f3p ph\u1ea7n l\u00e0m c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c x\u00e2y d\u1ef1ng quy tr\u00ecnh, quy ph\u1ea1m tr\u1ed3ng r\u1eebng Tr\u00e1m tr\u1eafng <\/p>\n

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

– Nghi\u00ean c\u1ee9u c\u01a1 s\u1edf khoa h\u1ecdc \u0111\u1ec3 \u0111\u1ec1 xu\u1ea5t gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh. <\/p>\n

– Nghi\u00ean c\u1ee9u bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh. <\/p>\n

– X\u00e2y d\u1ef1ng quy ph\u1ea1m k\u1ef9 thu\u1eadt. <\/p>\n

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

\u1ee9ng d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u sinh th\u00e1i th\u1ef1c nghi\u1ec7m \u0111\u1ec3 \u0111i\u1ec1u tra thu th\u1eadp s\u1ed1 li\u1ec7u ngo\u1ea1i ngi\u1ec7p v\u00e0 \u0111i\u1ec1u tra b\u1ed5 sung c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a Tr\u00e1m tr\u1eafng. \u1ee9ng d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed3ng ru\u1ed9ng \u0111\u1ec3 b\u1ed1 tr\u00ed c\u00e1c th\u00ed nghi\u1ec7m v\u1ec1 c\u00e1c k\u1ef9 thu\u1eadt tr\u1ed3ng t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng. <\/p>\n

C\u00e1c th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea, c\u00e1c c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c l\u1eb7p l\u1ea1i 3 l\u1ea7n. T\u00ednh to\u00e1n v\u00e0 x\u1eed l\u00fd s\u1ed1 li\u1ec7u d\u1ef1a v\u00e0o ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea v\u00e0 c\u00e1cph\u1ea7n m\u1ec1m vi t\u00ednh th\u00f4ng d\u1ee5ng hi\u1ec7n nay. <\/p>\n

2.4.V\u1eadt li\u1ec7u nghi\u00ean c\u1ee9u<\/b> <\/p>\n

Hi\u1ec7n tr\u01b0\u1eddng nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i 3 \u0111i\u1ec3m: C\u1ea7u Hai (Ph\u00fa Th\u1ecd), B\u00ecnh Thanh (Ho\u00e0 B\u00ecnh) v\u00e0 K\u1ef3 S\u01a1n (Ho\u00e0 B\u00ecnh). <\/p>\n

III.K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u00e0 th\u1ea3o lu\u1eadn<\/h2>\n

3.1.Nghi\u00ean c\u1ee9u c\u01a1 s\u1edf khoa h\u1ecdc \u0111\u1ec3 \u0111\u1ec1 xu\u1ea5t gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh<\/b> <\/p>\n

3.1.1.<\/i><\/b>\u0110i\u1ec1u tra y\u00eau c\u1ea7u v\u00e0 ti\u00eau chu\u1ea9n g\u1ed7 nguy\u00ean li\u1ec7u<\/i><\/b> <\/p>\n

Th\u00f4ng qua \u0111i\u1ec1u tra, kh\u1ea3o s\u00e1t m\u1ed9t s\u1ed1 c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t g\u1ed7 d\u00e1n \u1edf trong n\u01b0\u1edbc v\u00e0 th\u00ed nghi\u1ec7m b\u00f3c th\u1eed g\u1ed7 Tr\u00e1m l\u1ea5y t\u1eeb r\u1eebng tr\u1ed3ng 20 tu\u1ed5i \u1edf L\u1ea1c Thu\u1ef7, Ho\u00e0 B\u00ecnh, \u0111\u1ec1 t\u00e0i \u0111\u00e3 t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c b\u1ea3ng ti\u00eau chu\u1ea9n v\u1ec1 nguy\u00ean li\u1ec7u g\u1ed7 d\u00e1n g\u1ed3m ch\u1ee7ng lo\u1ea1i, quy c\u00e1ch g\u1ed7 tr\u00f2n, quy c\u00e1ch g\u1ed7 th\u00e0nh kh\u00ed v\u00e0 15 ti\u00eau chu\u1ea9n v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng t\u1eeb \u0111\u00f3 gi\u00fap cho vi\u1ec7c \u0111\u1ecbnh h\u01b0\u1edbng k\u1ef9 thu\u1eadt l\u00e2m sinh \u0111\u1ec3 t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u nguy\u00ean li\u1ec7u. \u0110\u1ec1 t\u00e0i c\u0169ng \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh \u0111\u01b0\u1ee3c g\u1ed7 Tr\u00e1m tr\u1eafng l\u1ea5y t\u1eeb r\u1eebng tr\u1ed3ng tho\u1ea3 m\u00e3n \u0111\u01b0\u1ee3c c\u00e1c ti\u00eau chu\u1ea9n nguy\u00ean li\u1ec7u g\u1ed7 d\u00e1n, t\u1ef7 l\u1ec7 th\u00e0nh kh\u00ed v\u00e1n b\u00f3c \u0111\u1ea1t 61,2% trong \u0111\u00f3 v\u00e1n m\u1eb7t chi\u1ebfm 73,8%. K\u1ebft qu\u1ea3 n\u00e0y cho th\u1ea5y g\u1ed7 Tr\u00e1m tr\u1eafng d\u00f9ng l\u00e0m nguy\u00ean li\u1ec7u g\u1ed7 d\u00e1n h\u01a1n h\u1eb3n c\u00e1c lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba kh\u00e1c. <\/p>\n

3.1.2<\/i><\/b>T\u1ed5ng k\u1ebft \u0111\u00e1nh gi\u00e1 c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00e1m \u0111\u00e3 c\u00f3<\/i><\/b> <\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 ti\u1ebfn h\u00e0nh t\u1ed5ng h\u1ee3p, ph\u00e2n t\u00edch 25 b\u00e1o c\u00e1o khoa h\u1ecdc c\u00f3 li\u00ean quan \u0111\u1ebfn c\u00e2y Tr\u00e1m tr\u1eafng c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 trong n\u01b0\u1edbc, kh\u1ea3o s\u00e1t \u0111\u00e1nh gi\u00e1 10 m\u00f4 h\u00ecnh tr\u1ed3ng Tr\u00e1m t\u1eeb 2 \u0111\u1ebfn16 tu\u1ed5i t\u1ea1i m\u1ed9t s\u1ed1 t\u1ec9nh ph\u00eda B\u1eafc v\u00e0 r\u00fat ra \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 nh\u1eadn x\u00e9t nh\u01b0 sau: <\/p>\n

– C\u00e2y Tr\u00e1m tr\u1eafng \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u t\u1eeb nhi\u1ec1u n\u0103m \u1edf 3 l\u0129nh v\u1ef1c ch\u00ednh: khai th\u00e1c ch\u1ebf bi\u1ebfn nh\u1ef1a, t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1eb7c t\u00ednh sinh v\u00e2t h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng. Hai l\u0129nh v\u1ef1c \u0111\u1ea7u \u0111\u01b0\u1ee3c coi l\u00e0 th\u00e0nh c\u00f4ng, ri\u00eang l\u0129nh v\u01b0c th\u1ee9 3 c\u00f2n nhi\u1ec1u h\u1ea1n ch\u1ebf, c\u00e1c c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u ch\u01b0a nhi\u1ec1u, thi\u1ebfu h\u1ec7 th\u1ed1ng v\u00e0 ch\u01b0a \u0111\u1ec1 xu\u1ea5t \u0111\u01b0\u1ee3c k\u1ef9 thu\u1eadt \u0111\u1ea3m b\u1ea3o ch\u1eafc ch\u1eafn cho vi\u1ebfc tr\u1ed3ng r\u1eebng th\u00e0nh c\u00f4ng, do v\u1eady m\u00e0 c\u00f2n thi\u1ebfu m\u00f4 h\u00ecnh ch\u1ee9ng minh tr\u00ean th\u1ef1c \u0111\u1ecba. <\/p>\n

– Trong s\u1ea3n xu\u1ea5t c\u0169ng c\u00f3 nhi\u1ec1u \u0111\u1ecba ph\u01b0\u01a1ng g\u00e2y tr\u1ed3ng h\u00e0ng tr\u0103m ha v\u1edbi nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c kh\u00e1c nhau nh\u01b0 \u1edf: Ho\u00e0 B\u00ecnh, Ph\u00fa Th\u1ecd, Y\u00ean B\u00e1i, Tuy\u00ean Quang, Th\u00e1i Nguy\u00ean, nh\u01b0ng \u0111a s\u1ed1 r\u1eebng Tr\u00e1m tr\u1ed3ng \u0111\u1ec1u b\u1ecb th\u1ea5t b\u1ea1i sau 3-4 n\u0103m \u0111\u1ea7u, s\u1ed1 c\u00f2n l\u1ea1i c\u0169ng sinh tr\u01b0\u1edfng k\u00e9m. Nguy\u00ean nh\u00e2n l\u00e0 ch\u01b0a n\u1eafm v\u1eefng c\u00e1c \u0111\u1eb7c t\u00ednh quan tr\u1ecdng c\u1ee7a c\u00e2y Tr\u00e1m tr\u1eafng n\u00ean vi\u1ec7c ch\u1ecdn ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng, ch\u1ecdn c\u00e2y ph\u00f9 tr\u1ee3 v\u00e0 qu\u00e1 tr\u00ecnh ch\u0103m s\u00f3c \u0111i\u1ec1u ti\u1ebft th\u1ef1c b\u00ec ch\u01b0a h\u1ee3p l\u00fd. <\/p>\n

3.1.3<\/i><\/b>Nghi\u00ean c\u1ee9u b\u1ed5 sung \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u01a1 b\u1ea3n c\u1ee7a tr\u00e1m tr\u1eafng<\/i><\/b> <\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u b\u1ed5 sung m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u01a1 b\u1ea3n cua Tr\u00e1m tr\u1eafng bao g\u1ed3m: Ph\u00e2n b\u1ed1, l\u1eadp \u0111\u1ecba, t\u00e1i sinh, ch\u1ebf \u0111\u1ed9 \u00e1nh s\u00e1ng c\u1ee7a Tr\u00e1m tr\u1eafng giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m. K\u1ebft qu\u1ea3 \u0111\u00e3 cho th\u1ea5y: <\/p>\n

– Tr\u00e1m tr\u1eafng l\u00e0 c\u00e2y ph\u00e2n b\u1ed1 r\u1ed9ng \u1edf c\u1ea3 3 mi\u1ec1n B\u1eafc, Trung, Nam v\u00e0 th\u01b0\u1eddng g\u1eb7p trong r\u1eebng th\u1ee9 sinh tr\u00ean \u0111\u1ea5t c\u00f2n nguy\u00ean tr\u1ea1ng. Tr\u00e1m c\u00f3 m\u1eb7t \u1edf nh\u1eefng v\u00f9ng c\u00f3 \u0111\u1ed9 cao t\u1eeb 10m (B\u00e0 R\u1ecba-V\u0169ng T\u00e0u, T\u00e2n Ph\u00fa – \u0110\u1ed3ng Nai) \u0111\u1ebfn 1000m (T\u1ee7a Ch\u00f9a – Lai Ch\u00e2u). <\/p>\n

– \u0110\u1ea5t \u0111ai v\u00f9ng Tr\u00e1m tr\u1eafng ph\u00e2n b\u1ed1 h\u1ea7u h\u1ebft l\u00e0 t\u1ea7ng \u0111\u1ea5t d\u00e0y tr\u00ean 0,5m, \u0111\u1ed9 chua pH(KCl) bi\u1ebfn \u0111\u1ed9ng t\u1eeb 3,4 – 5,7, l\u01b0\u1ee3ng P2<\/sub>O5<\/sub> h\u1ea7u h\u1ebft d\u01b0\u1edbi 5mg\/100g \u0111\u1ea5t, m\u00f9n bi\u1ebfn \u0111\u1ed9ng t\u1eeb 2 – 4,7%. \u0110i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf Tr\u00e1m tr\u1eafng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c \u0111\u1ea5t chua \u0111\u1ebfn \u00edt chua, l\u00e2n h\u01a1i ngh\u00e8o nh\u01b0ng m\u00f9n ph\u1ea3I kh\u00e1 v\u00e0 t\u1ea7ng \u0111\u1ea5t s\u00e2u. <\/p>\n

– Tr\u00e1m tr\u1eafng c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ef1 nhi\u00ean m\u1ea1nh c\u1ea3 h\u1ea1t v\u00e0 ch\u1ed3i. <\/p>\n

– M\u1ee9c \u0111\u1ed9 che s\u00e1ng kh\u00e1c nhau c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y con giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m (1 – 2 n\u0103m tu\u1ed5i), m\u1ee9c \u0111\u1ed9 che \u00e1nh s\u00e1ng 25 -50% c\u00e2y con sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t. <\/p>\n

3.2.<\/i><\/b>Nghi\u00ean c\u1ee9u c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh<\/i><\/b> <\/p>\n

Qua \u0111i\u1ec1u tra kh\u1ea3o s\u00e1t c\u00e1c m\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m c\u1ee7a c\u00e1c \u0111\u1ec1 t\u00e0i tr\u1ed3ng Tr\u00e1m tr\u01b0\u1edbc \u0111\u00e2y v\u00e0 c\u00e1c m\u00f4 h\u00ecnh tr\u1ed3ng r\u1eebng trong s\u1ea3n xu\u1ea5t, \u0111\u1ec1 t\u00e0i \u0111\u00e3 r\u00fat ra m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 t\u1ed3n t\u1ea1i hi\u1ec7n nay trong vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh \u0111\u1ec3 t\u1ea1o c\u00e1c l\u00e2m ph\u1ea7n Tr\u00e1m c\u00f3 s\u1ea3n l\u01b0\u01a1ng t\u1eadp trung. M\u1eb7t kh\u00e1c \u0111\u1ec1 t\u00e0i t\u1eadp trung gi\u1ea3i quy\u1ebft m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 then ch\u1ed1t l\u00e0: <\/p>\n

– Ch\u1ecdn ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng <\/p>\n

– Ch\u1ecdn c\u00e2y ph\u00f9 tr\u1ee3 <\/p>\n

– Ph\u01b0\u01a1ng th\u1ee9c h\u1ed7n giao <\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 ti\u1ebfn h\u00e0nh b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m t\u1ea1i x\u00f3m L\u00f2n x\u00e3 B\u00ecnh Thanh, Th\u00f4n 3 x\u00e3 M\u00f4ng Ho\u00e1, huy\u1ec7n K\u1ef3 S\u01a1n, t\u1ec9nh Ho\u00e0 B\u00ecnh v\u00e0 t\u1ea1i Trung t\u00e2m C\u1ea7u Hai x\u00e3 Ch\u00e2n M\u1ed9ng, huy\u1ec7n \u0110oan H\u00f9ng, t\u1ec9nh Ph\u00fa Th\u1ecd. <\/p>\n

3.2.1<\/i><\/b>K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng<\/i><\/b> <\/p>\n

B\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m<\/h3>\n

* C\u00f4ng th\u1ee9c 1 <\/b>(tr\u1ed3ng to\u00e0n di\u1ec7n c\u00f3 c\u00e2y ph\u00f9 tr\u1ee3): ph\u00e1t tr\u1eafng th\u1ef1c b\u00ec, d\u1ecdn s\u1ea1ch sau \u0111\u00f3 thi\u1ebft k\u1ebf tr\u1ed3ng r\u1eebng. M\u1eadt \u0111\u1ed9 tr\u1ed3ng 1600 c\u00e2y\/ha (3 x 2m), trong \u0111\u00f3 Tr\u00e1m tr\u1eafng 800 c\u00e2y\/ha, Keo tai t\u01b0\u1ee3ng 800 c\u00e2y\/ha. Tr\u00e1m v\u00e0 Keo tr\u1ed3ng c\u00f9ng m\u1ed9t l\u00fac, h\u1ed7n giao theo h\u00e0ng, gi\u1eefa c\u00e1c h\u00e0ng c\u00e2y gieo m\u1ed9t h\u00e0ng c\u1ed1t kh\u00ed. <\/p>\n

* C\u00f4ng th\u1ee9c 2 <\/b>(tr\u1ed3ng trong r\u1ea1ch): H\u1ea1 chi\u1ec1u cao c\u1ee7a r\u1eebng xu\u1ed1ng d\u01b0\u1edbi 5m, m\u1edf c\u00e1c r\u1ea1ch song song, r\u1ea1ch r\u1ed9ng 3m, t\u00e2m r\u1ea1ch c\u00e1ch \u0111\u1ec1u nhau 8m. Tr\u00ean r\u1ea1ch ph\u00e1t d\u1ecdn s\u1ea1ch th\u1ef1c b\u00ec v\u00e0 tr\u1ed3ng m\u1ed9t h\u00e0ng Tr\u00e1m \u1edf gi\u1eefa c\u00e2y c\u00e1ch c\u00e2y 2m. <\/p>\n

* C\u00f4ng th\u1ee9c 3<\/b> (tr\u1ed3ng \u0111\u1ed1i ch\u1ee9ng \u2014 thu\u1ea7n lo\u1ea1i kh\u00f4ng c\u00f3 c\u00e2y che ph\u1ee7): ph\u00e1t tr\u1eafng th\u1ef1c b\u00ec d\u1ecdn s\u1ea1ch sau \u0111\u00f3 thi\u1ebft k\u1ebf tr\u1ed3ng r\u1eebng. M\u1eadt \u0111\u1ed9 tr\u1ed3ng r\u1eebng 1600 c\u00e2y\/ha (Tr\u00e1m thu\u1ea7n lo\u00e0i), kh\u00f4ng tr\u1ed3ng c\u00e2y che ph\u1ee7 \u0111\u1ea5t. <\/p>\n

Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed t\u1ea1i B\u00ecnh Thanh (Ho\u00e0 B\u00ecnh) n\u0103m 1996 tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng ph\u1ee5c h\u1ed3i. T\u1ea1i C\u1ea7u Hai (Ph\u00fa Th\u1ecd) n\u0103m 1996 sau r\u1eebng M\u1ee1 khai th\u00e1c tr\u1eafng. Qua bi\u1ec3u 1 cho th\u1ea5y \u1edf c\u1ea3 3 \u0111i\u1ec3m th\u00ed nghi\u1ec7m, \u1edf giai \u0111o\u1ea1n nh\u1ecf (1 tu\u1ed5i) sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao Tr\u00e1m tr\u1eafng ch\u01b0a c\u00f3 kh\u00e1c nhau, nh\u01b0ng t\u1eeb tu\u1ed5i 2 tr\u1edf \u0111i s\u1ef1 kh\u00e1c nhau \u1edf c\u00e1c c\u00f4ng th\u1ee9c r\u00f5 r\u1ec7t h\u01a1n v\u00e0 c\u00f4ng th\u01b0c tr\u1ed3ng to\u00e0n di\u1ec7n c\u00f3 c\u00e2y ph\u00f9 tr\u1ee3 c\u00f3 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao t\u1ed1t nh\u1ea5t. Ch\u00fang ta \u0111\u00e3 kh\u1ea3o s\u00e1t c\u00e1c th\u00ed nghi\u1ec7m t\u1ea1i B\u00ecnh Thanh-Ho\u00e0 B\u00ecnh cho th\u1ea5y m\u00f4 h\u00ecnh c\u00f3 tu\u1ed5i l\u1edbn nh\u1ea5t (4 tu\u1ed5i) c\u00f3 th\u1ec3 th\u1ea5y v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c \u1edf 12 th\u00e1ng tu\u1ed5i trong 3 c\u00f4ng th\u1ee9c ch\u01b0a c\u00f3 g\u00ec kh\u00e1c, nh\u01b0ng sau \u0111\u00f3 th\u00ec c\u00f4ng th\u1ee9c c\u00f3 c\u00e2y ph\u00f9 tr\u1ee3 \u0111\u00e3 v\u01b0\u1ee3t l\u00ean h\u1eb3n. C\u00f2n l\u1ea1i hai c\u00f4ng th\u1ee9c tr\u1ed3ng trong r\u1ea1ch v\u00e0 \u0111\u1ed1i ch\u1ee9ng th\u00ec \u0111\u1ebfn n\u0103m th\u1ee9 t\u01b0 v\u1eabn ch\u01b0a c\u00f3 sai kh\u00e1c. V\u1ec1 chi\u1ec1u cao th\u00ec hai n\u0103m \u0111\u1ea7u c\u1ea3 3 c\u00f4ng th\u1ee9c \u0111\u1ec1u ch\u01b0a c\u00f3 g\u00ec sai kh\u00e1c, nh\u01b0ng \u0111\u1ebfn 24 th\u00e1ng tr\u1edf \u0111i 3 c\u00f4ng th\u1ee9c \u0111\u00e3 b\u1eaft \u0111\u1ea7u ph\u00e2n h\u00f3a. C\u00f4ng th\u1ee9c c\u00f3 c\u00e2y ph\u00f9 tr\u1ee3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao l\u1edbn nh\u1ea5t (bi\u1ec3u 2). <\/p>\n

Bi\u1ec3u 1. Sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh v\u00e0 chi\u1ec1u cao Tr\u00e1m tr\u1eafng tr\u1ed3ng trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m t\u1ea1i 3 \u0111\u1ecba \u0111i\u1ec3m (l\u1ea7n \u0111o th\u00e1ng 11 n\u0103m 1999)<\/b> <\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

I.m\u1edf \u0111\u1ea7u
\nTr\u00e1m tr\u1eafng (Canarium album Raeusch) l\u00e0 c\u00e2y g\u1ed7 b\u1ea3n \u0111\u1ecba c\u00f3 chi\u1ec1u cao t\u1eeb 20 – 30m, \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c \u0111\u1ea1t 50 – 70m, th\u00e2n tr\u00f2n th\u1eb3ng, t\u00e1n r\u1ed9ng v\u00e0 l\u00e1 xanh quanh n\u0103m. Tr\u00e1m tr\u1eafng l\u00e0 c\u00e2y \u0111a m\u1ee5c \u0111\u00edch \u0111\u01b0\u1ee3c nh\u00e2n d\u00e2n ta \u01b0a chu\u1ed9ng.
\nG\u1ed7 Tr\u00e1m tr\u1eafng m\u1ec1m, nh\u1eb9 th\u1edb m\u1ecbn, d\u1ec5 b\u00f3c th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m nguy\u00ean li\u1ec7u g\u1ed7 d\u00e1n, \u0111\u00f3ng \u0111\u1ed3 th\u00f4ng th\u01b0\u1eddng, d\u00f9ng trong x\u00e2y d\u1ef1ng nh\u00e0 c\u1eeda.
\nNh\u1ef1a Tr\u00e1m d\u00f9ng trong c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn x\u00e0 ph\u00f2ng, n\u01b0\u1edbc hoa, s\u01a1n t\u1ed5ng h\u1ee3p, l\u00e0m ch\u1ea5t c\u00e1ch \u0111i\u1ec7n. Qu\u1ea3 Tr\u00e1m \u0103n \u0111\u01b0\u1ee3c, c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 ch\u1ebf bi\u1ebfn \u00f4 mai, l\u00e0m th\u1ef1c ph\u1ea9m, l\u00e0m thu\u1ed1c ch\u1eefa ho v\u00e0 gi\u1ea3i \u0111\u1ed9c.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8790"}],"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=8790"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8790\/revisions"}],"predecessor-version":[{"id":10246,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8790\/revisions\/10246"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}