{"id":14123,"date":"2015-01-12T10:56:47","date_gmt":"2015-01-12T03:56:47","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=14123"},"modified":"2015-01-13T08:44:25","modified_gmt":"2015-01-13T01:44:25","slug":"bao-cao-ket-qua-nghien-cuu-de-tai-nghien-cuu-su-dung-tong-hop-co-hieu-qua-go-tram","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-ket-qua-nghien-cuu-de-tai-nghien-cuu-su-dung-tong-hop-co-hieu-qua-go-tram\/","title":{"rendered":"B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u1ec1 t\u00e0i: Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p, c\u00f3 hi\u1ec7u qu\u1ea3 g\u1ed7 tr\u00e0m"},"content":{"rendered":"

TS. B\u00f9i Duy Ng\u1ecdc<\/em><\/p>\n

\u00a0(i) \u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/b><\/p>\n

 <\/p>\n

\u0110\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long v\u1edbi 2 h\u1ec7 sinh th\u00e1i r\u1eebng r\u1ea5t quan tr\u1ecdng l\u00e0: h\u1ec7 sinh th\u00e1i r\u1eebng ng\u1eadp m\u1eb7n v\u00e0 h\u1ec7 sinh th\u00e1i r\u1eebng tr\u00e0m. H\u1ec7 sinh th\u00e1i r\u1eebng tr\u00e0m ph\u00e1t tri\u1ec3n tr\u00ean v\u00f9ng ng\u1eadp n\u01b0\u1edbc n\u1ed9i \u0111\u1ecba v\u00e0 n\u01a1i \u0111\u1ea5t b\u1ecb ph\u00e8n c\u00f3 \u0111\u1ecba h\u00ecnh th\u1ea5p, v\u1edbi lo\u00e0i c\u00e2y r\u1eebng ch\u00ednh l\u00e0 tr\u00e0m.<\/p>\n

\"phoi-go-tram\"<\/a><\/p>\n

Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, bi\u1ebfn \u0111\u1ed9ng v\u1ec1 di\u1ec7n t\u00edch \u0111\u00e3 ph\u1ea3n \u00e1nh s\u1ef1 ph\u00e1t tri\u1ec3n kh\u00f4ng b\u1ec1n v\u1eefng c\u1ee7a r\u1eebng tr\u00e0m.\u00a0 T\u1eeb 2002 \u0111\u1ebfn 2005 di\u1ec7n t\u00edch r\u1eebng tr\u00e0m t\u0103ng l\u00ean nhanh ch\u00f3ng (t\u0103ng th\u00eam 23.967 ha) sau \u0111\u00f3 gi\u1ea3m d\u1ea7n t\u1eeb 2006 \u0111\u1ebfn 2008 (trong 3 n\u0103m di\u1ec7n t\u00edch r\u1eebng tr\u00e0m s\u1ea3n xu\u1ea5t gi\u1ea3m \u0111i 3.039 ha, trong\u00a0 \u0111\u00f3 ch\u1ee7 y\u1ebfu l\u00e0 suy gi\u1ea3m di\u1ec7n t\u00edch r\u1eebng s\u1ea3n xu\u1ea5t). S\u1ef1 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 di\u1ec7n t\u00edch r\u1eebng tr\u00e0m n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 do gi\u00e1 b\u00e1n c\u1eeb tr\u00e0m thay \u0111\u1ed5i. Trong khi \u0111\u00f3 gi\u00e1 b\u00e1n c\u1eeb tr\u00e0m tr\u00ean th\u1ecb tr\u01b0\u1eddng l\u1ea1i ph\u1ee5 thu\u1ed9c nhi\u1ec1u v\u00e0o s\u1ef1 c\u00e2n \u0111\u1ed1i c\u00e1n c\u00e2n cung \u1ee9ng v\u00e0 nhu c\u1ea7u c\u1ee7a s\u1ea3n ph\u1ea9m n\u00e0y tr\u00ean th\u1ecb tr\u01b0\u1eddng.<\/p>\n

 <\/p>\n

Nh\u01b0 v\u1eady: g\u1ed7 tr\u00e0m l\u00e0 ngu\u1ed3n nguy\u00ean li\u1ec7u ti\u1ec1m n\u0103ng \u1edf v\u00f9ng \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long \u0111\u1ed1i v\u1edbi ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7. Tuy nhi\u00ean, hi\u1ec7n nay ph\u1ea7n l\u1edbn g\u1ed7 tr\u00e0m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m \u201cc\u1eeb\u201d (m\u1ed9t lo\u1ea1i c\u1ecdc gia c\u1ed1 n\u1ec1n m\u00f3ng trong c\u00e1c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng), l\u00e0m ch\u1ea5t \u0111\u1ed1t, h\u1ea7m than, b\u0103m d\u0103m xu\u1ea5t kh\u1ea9u ..v.v. do \u0111\u00f3 gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng c\u1ee7a g\u1ed7 tr\u00e0m ch\u01b0a cao.<\/p>\n

 <\/p>\n

\u0110\u1ec3 g\u00f3p ph\u1ea7n duy tr\u00ec v\u00e0 ph\u00e1t tri\u1ec3n\u00a0 b\u1ec1n v\u1eefng r\u1eebng tr\u00e0m, n\u00e2ng cao gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng\u00a0 g\u1ed7 tr\u00e0m n\u00f3i ri\u00eang, r\u1eebng tr\u00e0m n\u00f3i chung, \u0111\u1ed3ng th\u1eddi \u0111\u00e1p \u1ee9ng ph\u1ea7n n\u00e0o nhu c\u1ea7u v\u1ec1 nguy\u00ean li\u1ec7u c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam ti\u1ebfn h\u00e0nh th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i (2006 \u2013 2009): \u201cNghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p, c\u00f3 hi\u1ec7u qu\u1ea3 g\u1ed7 tr\u00e0m\u201d<\/i><\/b>.<\/p>\n

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

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

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

\u0110\u1ec1 t\u00e0i \u0111\u00e3 t\u1eadp trung gi\u1ea3i quy\u1ebft m\u1ed9t s\u1ed1 n\u1ed9i dung c\u01a1 b\u1ea3n sau:<\/p>\n

– X\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u1ec3 c\u00e2y g\u1ed7 tr\u00e0m theo 2 c\u1ea5p tu\u1ed5i t\u1ea1i 3 \u0111\u1ecba \u0111i\u1ec3m;<\/p>\n

– Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m l\u00e0m g\u1ed7 x\u1ebb s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c;<\/p>\n

– Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m l\u00e0m v\u00e1n d\u0103m;<\/p>\n

– S\u01a1 b\u1ed9 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m theo h\u01b0\u1edbng: \u201c S\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p\u201d.<\/p>\n

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

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

– K\u1ebf th\u1eeba c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00f3 tr\u01b0\u1edbc.<\/p>\n

– Thu th\u1eadp c\u00e1c th\u00f4ng tin b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ph\u1ecfng v\u1ea5n tr\u1ef1c ti\u1ebfp v\u00e0 ti\u1ebfp thu th\u00f4ng tin c\u00f3 tr\u01b0\u1edbc theo t\u00e0i li\u1ec7u.<\/p>\n

– D\u1ef1a v\u00e0o ti\u00eau chu\u1ea9n Vi\u1ec7t Nam nh\u01b0: TCVN 1070-71; TCVN 1073-71; TCVN 1757-75; \u00a0TCVN 1758-75; ….\u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng nguy\u00ean li\u1ec7u g\u1ed7.<\/p>\n

– Quy ho\u1ea1ch th\u1ef1c nghi\u1ec7m \u0111\u01a1n y\u1ebfu t\u1ed1. Ti\u1ebfn h\u00e0nh th\u00ed nghi\u1ec7m theo ma tr\u1eadn \u0111\u00e3 quy ho\u1ea1ch.<\/p>\n

– S\u1eed d\u1ee5ng c\u00e1c ti\u00eau chu\u1ea9n c\u1ee7a Vi\u1ec7t Nam c\u0169ng nh\u01b0 ti\u00eau chu\u1ea9n c\u1ee7a n\u01b0\u1edbc ngo\u00e0i \u0111\u1ec3 ki\u1ec3m tra, \u0111\u00e1nh gi\u00e1 k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m nh\u01b0\u00a0: TCVN TCVN 7756 \u2013 (3; 4; 5; 6; 7; 8) : 2007. ti\u00eau chu\u1ea9n ASMTE 70-68. ti\u00eau chu\u1ea9n \u0433OCT, JIS, …<\/p>\n

– S\u1ed1 li\u1ec7u th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c x\u1eed l\u00fd lo\u1ea1i b\u1ecf sai s\u1ed1 th\u00f4 theo ti\u00eau chu\u1ea9n Studen.<\/p>\n

(iii) K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U V\u00c0 TH\u1ea2O LU\u1eacN <\/b><\/p>\n

3.1. X\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u1ec3 c\u00e2y g\u1ed7 tr\u00e0m theo 2 c\u1ea5p tu\u1ed5i t\u1ea1i 3 \u0111\u1ecba \u0111i\u1ec3m<\/b><\/p>\n

C\u00e2y tr\u00e0m \u0111\u01b0\u1ee3c tr\u1ed3ng t\u1eadp trung, c\u00f3 di\u1ec7n t\u00edch l\u1edbn, ch\u1ee7 y\u1ebfu \u1edf 3 t\u1ec9nh: Long An, An Giang v\u00e0 C\u00e0 Mau. Chu k\u1ef3 kinh doanh (khai th\u00e1c ch\u1eb7t tr\u1eafng) c\u1ee7a g\u1ed7 tr\u00e0m l\u00e0 5 \u2013 7 n\u0103m, ch\u1eadm nh\u1ea5t kho\u1ea3ng 10 n\u0103m. K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u1ec3 c\u00e2y g\u1ed7 tr\u00e0m nh\u01b0 sau:<\/p>\n

– C\u00e2y tr\u00e0m \u1edf tu\u1ed5i khai th\u00e1c (5 \u2013 7 n\u0103m) c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c nh\u1ecf. \u1ede tu\u1ed5i n\u00e0y, h\u1ea7u h\u1ebft g\u1ed7 tr\u00e0m c\u00f3 \u0111\u01b0\u1eddng k\u00ednh (D1.3) dao \u0111\u1ed9ng trong kh\u1ea3ng t\u1eeb 6 \u2013 10 cm. C\u00e2y tr\u00e0m l\u1edbn h\u01a1n 10 tu\u1ed5i c\u00f3 \u0111\u01b0\u1eddng k\u00ednh (D1.3) dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 10 \u2013 15 cm.<\/p>\n

– G\u1ed7 tr\u00e0m c\u00f3 t\u1ef7 l\u1ec7 v\u1ecf nhi\u1ec1u, chi\u1ebfm kho\u1ea3ng 15 %.<\/p>\n

– G\u1ed7 tr\u00e0m c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch dao \u0111\u1ed9ng t\u1eeb 0.5 \u2013 0.55 g\/cm3<\/sup>. S\u1ed1 li\u1ec7u n\u00e0y ph\u1ea3n \u00e1nh, \u0111\u00e2y l\u00e0 lo\u1ea1i g\u1ed7 n\u1eb7ng trung b\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch c\u1ee7a g\u1ed7 keo.<\/p>\n

3.2. Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m l\u00e0m g\u1ed7 x\u1ebb s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c<\/b><\/p>\n

Khai th\u00e1c g\u1ed7 tr\u00e0m ta (Melaleuca cajuputi) 5 tu\u1ed5i v\u00e0 10 tu\u1ed5i t\u1ea1i t\u1ec9nh C\u00e0 Mau v\u00e0 g\u1ed7 tr\u00e0m \u00dac (Melaleuca leucadendra) 5 tu\u1ed5i v\u00e0 7 tu\u1ed5i t\u1ea1i t\u1ec9nh Long An.<\/p>\n

*\/ X\u00e1c \u0111\u1ecbnh c\u00e1c th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc c\u1ee7a kh\u00fac g\u1ed7 tr\u00f2n g\u1ed7 tr\u00e0m:<\/p>\n

C\u00e1c kh\u00fac g\u1ed7 tr\u00f2n \u0111\u01b0\u1ee3c \u0111o \u0111\u1ebfm, l\u1ea5y s\u1ed1 li\u1ec7u k\u00edch th\u01b0\u1edbc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u00f4ng s\u1ed1 nh\u01b0: \u0111\u1ed9 thon; \u0111\u1ed9 cong; \u0111\u1ed9 \u00f4 van ..v.v. Sau \u0111\u00f3 so s\u00e1nh th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc c\u1ee7a g\u1ed7 tr\u00e0m v\u1edbi m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng kh\u00e1c. K\u1ebft qu\u1ea3 nh\u01b0 sau:<\/p>\n

B\u1ea3ng 3.1. Th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc c\u1ee7a g\u1ed7 tr\u00f2n g\u1ed7 tr\u00e0m v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng kh\u00e1c.<\/p>\n\n\n\n\n\n\n\n\n\n\n
\n

TT<\/b><\/p>\n<\/td>\n

\n

Lo\u1ea1i g\u1ed7<\/b><\/p>\n<\/td>\n

\n

Th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

\u0110\u1ed9 thon (cm\/m)<\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 \u00f4 van (%)<\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 cong (%)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

Tr\u00e0m ta 5 tu\u1ed5i<\/td>\n\n

0.45<\/p>\n<\/td>\n

\n

4.22<\/p>\n<\/td>\n

\n

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

\n

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

Tr\u00e0m ta 10 tu\u1ed5i<\/td>\n\n

0.74<\/p>\n<\/td>\n

\n

6.52<\/p>\n<\/td>\n

\n

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

\n

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

Tr\u00e0m \u00dac 5 tu\u1ed5i<\/td>\n\n

0.99<\/p>\n<\/td>\n

\n

7.83<\/p>\n<\/td>\n

\n

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

\n

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

Tr\u00e0m \u00dac 7 tu\u1ed5i<\/td>\n\n

1.00<\/p>\n<\/td>\n

\n

4.47<\/p>\n<\/td>\n

\n

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

\n

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

B.\u0111\u00e0n Urophylla 8 tu\u1ed5i (*)<\/td>\n\n

0.8<\/p>\n<\/td>\n

\n

0.1<\/p>\n<\/td>\n

\n

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

\n

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

Keo lai 9 tu\u1ed5i (*)<\/td>\n\n

0.7<\/p>\n<\/td>\n

\n

0.07<\/p>\n<\/td>\n

\n

1.81<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(Ngu\u1ed3n (*) – Ti\u1ec1m n\u0103ng nguy\u00ean li\u1ec7u g\u1ed7 tr\u00e0m \u1edf Ki\u00ean Giang v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng s\u1eed d\u1ee5ng \u2013 Nguy\u1ec5n Qung Trung)<\/p>\n

*\/ M\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 – v\u1eadt l\u00fd ch\u1ee7 y\u1ebfu c\u1ee7a g\u1ed7 tr\u00e0m;<\/p>\n

K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t c\u01a1 \u2013 v\u1eadt l\u00fd c\u1ee7a g\u1ed7 tr\u00e0m c\u1ee7a c\u00e1c chuy\u00ean gia CSIRO-FFP v\u00e0 Trung t\u00e2m c\u00f4ng ngh\u1ec7 g\u1ed7, \u1ee6y ban s\u1ea3n ph\u1ea9m r\u1eebng thu\u1ed9c Bang mi\u1ec1n T\u00e2y n\u01b0\u1edbc \u00dac(forest Products commision) v\u00e0 so s\u00e1nh v\u1edbi m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng kh\u00e1c nh\u01b0 sau:<\/p>\n

B\u1ea3ng 3.2. T\u1ef7 l\u1ec7 co r\u00fat c\u1ee7a g\u1ed7 tr\u00e0m v\u1edbi m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng kh\u00e1c.<\/p>\n\n\n\n\n\n\n\n\n
\n

TT<\/b><\/p>\n<\/td>\n

\n

Lo\u1ea1i g\u1ed7<\/b><\/p>\n

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

\n

Co r\u00fat theo chi\u1ec1u ti\u1ebfp tuy\u1ebfn Yt (%)<\/b><\/p>\n<\/td>\n

\n

Co r\u00fat theo chi\u1ec1u xuy\u00ean t\u00e2m Yx (%)<\/b><\/p>\n<\/td>\n

\n

Co r\u00fat theo chi\u1ec1u d\u1ecdc th\u1edb Yl (%)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

Acacia aff. Redolens<\/i><\/td>\n\n

2.2<\/p>\n<\/td>\n

\n

1.3<\/p>\n<\/td>\n

\n

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

\n

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

Eucalyptus occidentalis<\/i><\/td>\n\n

9.1<\/p>\n<\/td>\n

\n

4.5<\/p>\n<\/td>\n

\n

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

\n

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

Eucalyptus ornate<\/i><\/td>\n\n

6.6<\/p>\n<\/td>\n

\n

3.7<\/p>\n<\/td>\n

\n

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

\n

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

Melaleuca preissiana<\/i><\/td>\n\n

23.2<\/p>\n<\/td>\n

\n

11.2<\/p>\n<\/td>\n

\n

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

\n

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

Melaleuca rhaphiophylla<\/i><\/td>\n\n

15.0<\/p>\n<\/td>\n

\n

6.7<\/p>\n<\/td>\n

\n

0.26<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nh\u1eadn x\u00e9t:<\/p>\n

– G\u1ed7 tr\u00e0m c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf, h\u1ea7u h\u1ebft \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf h\u01a1n 15 cm, m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng r\u1ea5t \u00edt ( kho\u1ea3ng 15 %) kh\u00fac g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 15 cm.<\/p>\n

– \u0110\u1ed9 \u00f4 van v\u00e0 \u0111\u1ed9 cong c\u1ee7a g\u1ed7 tr\u00e0m r\u1ea5t l\u1edbn.<\/p>\n

– G\u1ed7 tr\u00e0m co r\u00fat theo c\u00e1c chi\u1ec1u xuy\u00ean t\u00e2m v\u00e0 ti\u1ebfp tuy\u1ebfn r\u1ea5t l\u1edbn. L\u1edbn h\u01a1n g\u1ea5p nhi\u1ec1u l\u1ea7n so v\u1edbi g\u1ed7 keo v\u00e0 g\u1ed7 b\u1ea1ch \u0111\u00e0n.<\/p>\n

T\u1eeb nh\u1eefng l\u00fd do n\u00eau tr\u00ean, th\u1ea5y r\u1eb1ng: kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m l\u00e0m g\u1ed7 x\u1ebb.<\/span><\/i><\/b><\/p>\n

M\u1eb7c d\u00f9 v\u1eady, nh\u01b0ng do m\u1ee5c ti\u00eau c\u1ee7a \u0111\u1ec1 t\u00e0i l\u00e0 nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p g\u1ed7 tr\u00e0m, ngo\u00e0i ra \u0111\u1ec3 t\u1ea1o ngu\u1ed3n nguy\u00ean li\u1ec7u m\u1edbi trong c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c, n\u00ean c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn m\u1ed9t s\u1ed1 \u00edt nh\u1eefng kh\u00fac g\u1ed7 tr\u00e0m t\u01b0\u01a1ng \u0111\u1ed1i tr\u00f2n, th\u1eb3ng \u0111\u1ec3 l\u00e0m g\u1ed7 x\u1ebb.<\/p>\n

\u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 x\u1ebb: qua ki\u1ec3m tra c\u00f3 4 lo\u1ea1i khuy\u1ebft t\u1eadt ch\u1ee7 y\u1ebfu l\u00e0 m\u1eaft s\u1ed1ng, m\u1eaft h\u01b0 (m\u1eaft ch\u1ebft), l\u1ed7 m\u1ecdt v\u00e0 v\u00e1n v\u00e1n b\u1ecb xi\u00ean th\u1edb. t\u1ef7 l\u1ec7 v\u00e1n c\u00f3 m\u1eaft s\u1ed1ng: 55.64 %; v\u00e1n c\u00f3 m\u1eaft ch\u1ebft: 23.06 %; v\u00e1n c\u00f3 khuy\u1ebft t\u1eadt do l\u1ed7 m\u1ecdt: 36.48 %; v\u00e1n b\u1ecb xi\u00ean th\u1edb: 46.58 %.<\/p>\n

Do g\u1ed7 tr\u00e0m c\u00f3 t\u1ef7 l\u1ec7 co r\u00fat theo c\u00e1c chi\u1ec1u r\u1ea5t l\u1edbn, n\u00ean khi s\u1ea5y g\u1ed7 x\u1ebb g\u1ed7 tr\u00e0m, c\u00e1c ph\u00f4i g\u1ed7 x\u1ebb s\u1ebd b\u1ecb bi\u1ebfn d\u1ea1ng, cong v\u00eanh d\u1eabn \u0111\u1ebfn m\u1ea5t m\u00e1t v\u1ec1 g\u1ed7 khi gia c\u00f4ng ch\u1ebf bi\u1ebfn cho kh\u00e2u s\u1ea5y l\u1edbn. K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng d\u01b0 cho kh\u00e2u s\u1ea5y (LDKS) g\u1ed7 x\u1ebb g\u1ed7 tr\u00e0m v\u00e0 so s\u00e1nh LDKS c\u1ee7a g\u1ed7 tr\u00e0m v\u1edbi m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng kh\u00e1c nh\u01b0 sau:<\/p>\n

B\u1ea3ng 3.3. LDKS g\u1ed7 x\u1ebb g\u1ed7 tr\u00e0m so v\u1edbi m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng<\/p>\n\n\n\n\n\n\n\n
\n

TT<\/p>\n<\/td>\n

\n

Ph\u01b0\u01a1ng<\/p>\n

ph\u00e1p x\u1ebb<\/p>\n<\/td>\n

\n

L\u01b0\u1ee3ng d\u01b0 kh\u00e2u s\u1ea5y (%)<\/p>\n<\/td>\n<\/tr>\n

\n

G\u1ed7 tr\u00e0m<\/p>\n<\/td>\n

\n

G\u1ed7 keo lai(*)<\/sup><\/p>\n<\/td>\n

\n

G\u1ed7 keo tai t\u01b0\u1ee3ng(*)<\/sup><\/p>\n<\/td>\n

\n

G\u1ed7 keo l\u00e1 tr\u00e0m(*)<\/sup><\/p>\n<\/td>\n<\/tr>\n

\n

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

X\u1ebb xuy\u00ean t\u00e2m<\/td>\n\n

11.24<\/p>\n<\/td>\n

\n

4.81<\/p>\n<\/td>\n

\n

5.88<\/p>\n<\/td>\n

\n

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

\n

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

X\u1ebb ti\u1ebfp tuy\u1ebfn<\/td>\n\n

12.32<\/p>\n<\/td>\n

\n

5.41<\/p>\n<\/td>\n

\n

6.38<\/p>\n<\/td>\n

\n

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

\n

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

X\u1ebb b\u1ed5 \u0111\u00f4i<\/td>\n\n

12.26<\/p>\n<\/td>\n

\n

4.91<\/p>\n<\/td>\n

\n

5.90<\/p>\n<\/td>\n

\n

5.40<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(Ngu\u1ed3n: (*)- B\u00e1o c\u00e1o t\u1ed5ng k\u1ebft \u0111\u1ec1 t\u00e0i Nghi\u00ean c\u1ee9u c\u00f4ng ngh\u1ec7 b\u1ea3o qu\u1ea3n, ch\u1ebf bi\u1ebfn g\u1ed7 r\u1eebng tr\u1ed3ng, 2005)<\/p>\n

*\/ Nghi\u00ean c\u1ee9u \u1ed5n \u0111\u1ecbnh h\u00ecnh d\u1ea1ng, k\u00edch th\u01b0\u1edbc g\u1ed7 x\u1ebb g\u1ed7 tr\u00e0m<\/p>\n

\u0110\u1ec3 \u1ed5n \u0111\u1ecbnh h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a g\u1ed7 x\u1ebb g\u1ed7 tr\u00e0m khi s\u1ea5y, \u0111\u1ec1 t\u00e0i s\u1eed d\u1ee5ng dung d\u1ecbch thu\u1ed1c PEG 600 (Poly Ethylene Glycol) v\u1edbi c\u00e1c m\u1ee9c n\u1ed3ng \u0111\u1ed9 dung d\u1ecbch, th\u1eddi gian ng\u00e2m v\u00e0 nhi\u1ec7t \u0111\u1ed9 dung d\u1ecbch khi ng\u00e2m kh\u00e1c nhau. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y: G\u1ed7 tr\u00e0m sau khi x\u1eed l\u00fd b\u1eb1ng dung d\u1ecbch thu\u1ed1c PEG600 c\u00f3 n\u1ed3ng \u0111\u1ed9 l\u00e0 30 %, th\u1eddi gian ng\u00e2m l\u00e0 6 gi\u1edd, nhi\u1ec7t \u0111\u1ed9 dung d\u1ecbch khi ng\u00e2m l\u00e0 300<\/sup> C \u0111\u00e3 cho k\u1ebft qu\u1ea3 t\u1ed1t. G\u1ed7 tr\u00e0m c\u00f3 x\u1eed l\u00fd sau khi s\u1ea5y c\u00f3 h\u00ecnh d\u1ea1ng, k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh theo c\u1ea3 2 chi\u1ec1u xuy\u00ean t\u00e2m v\u00e0 ti\u1ebfp tuy\u1ebfn. G\u1ed7 tr\u00e0m c\u00f3 x\u1eed l\u00fd so v\u1edbi g\u1ed7 keo th\u00ec m\u1ee9c \u0111\u1ed9 co r\u00fat cao h\u01a1n, nh\u01b0ng so v\u1edbi g\u1ed7 b\u1ea1ch \u0111\u00e0n th\u00ec m\u1ee9c \u0111\u1ed9 co r\u00fat th\u1ea5p h\u01a1n.<\/p>\n

B\u1ea3ng 3.4. T\u1ef7 l\u1ec7 co r\u00fat c\u1ee7a g\u1ed7 tr\u00e0m, g\u1ed7 keo v\u00e0 g\u1ed7 b\u1ea1ch \u0111\u00e0n.<\/p>\n\n\n\n\n\n\n\n
\n

TT<\/b><\/p>\n<\/td>\n

\n

Lo\u1ea1i g\u1ed7<\/b><\/p>\n<\/td>\n

\n

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

\n

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

\n

Yl (%)<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

G\u1ed7 tr\u00e0m c\u00f3 x\u1eed l\u00fd PEG 600<\/td>\n\n

4.133<\/p>\n<\/td>\n

\n

2.898<\/p>\n<\/td>\n

\n

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

\n

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

G\u1ed7 tr\u00e0m <\/i>\u00a0kh\u00f4ng x\u1eed l\u00fd<\/td>\n\n

23.2<\/p>\n<\/td>\n

\n

11.2<\/p>\n<\/td>\n

\n

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

\n

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

Acacia aff. Redolens<\/i><\/td>\n\n

2.2<\/p>\n<\/td>\n

\n

1.3<\/p>\n<\/td>\n

\n

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

\n

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

Eucalyptus occidentalis<\/i><\/td>\n\n

9.1<\/p>\n<\/td>\n

\n

4.5<\/p>\n<\/td>\n

\n

0.28<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

*\/ Ki\u1ec3m tra b\u00e1m d\u00ednh c\u1ee7a g\u1ed7 tr\u00e0m v\u1edbi ch\u1ea5t k\u1ebft d\u00ednh (keo)<\/i><\/p>\n

Ch\u1ea5t k\u1ebft d\u00ednh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 keo PVAc (Polyvinyl Axetat). L\u01b0\u1ee3ng keo tr\u00e1ng cho d\u00e1n gh\u00e9p l\u00e0 200 g\/m2<\/sup>. K\u1ebft qu\u1ea3 ki\u1ec3m tra l\u1ef1c b\u00e1m d\u00ednh c\u1ee7a g\u1ed7 tr\u00e0m v\u1edbi keo PVAc l\u00e0: 11.09 MPa. L\u1ef1c b\u00e1m d\u00ednh n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi l\u1ef1c b\u00e1m d\u00ednh c\u1ee7a c\u00e1c lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng kh\u00e1c nh\u01b0 keo ho\u1eb7c b\u1ea1ch \u0111\u00e0n.<\/p>\n

3.3. Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m l\u00e0m v\u00e1n d\u0103m;<\/b><\/p>\n

*\/ X\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t c\u00f4ng ngh\u1ec7 nguy\u00ean li\u1ec7u g\u1ed7 tr\u00e0m l\u00e0m v\u00e1n d\u0103m:<\/i><\/p>\n

K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh cho th\u1ea5y: g\u1ed7 tr\u00e0m kh\u00f4ng \u0111\u1ea1t y\u00eau c\u1ea7u so v\u1edbi nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m l\u00e0 v\u00ec \u0111\u1ed9 cong c\u1ee7a c\u00e1c kh\u00fac g\u1ed7 l\u1edbn. M\u1eb7t kh\u00e1c t\u1ef7 l\u1ec7 v\u1ecf cao (l\u1edbn h\u01a1n 10 %, y\u00eau c\u1ea7u nh\u1ecf h\u01a1n 10 %) do \u0111\u00f3 tr\u01b0\u1edbc khi b\u0103m d\u0103m kh\u00e2u b\u00f3c v\u1ecf \u0111\u1ec3 lo\u1ea1i b\u1ecf l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1eb7t kh\u00e1c \u0111\u1ed9 pH c\u1ee7a g\u1ed7 tr\u00e0m l\u1edbn h\u01a1n so v\u1edbi quy \u0111\u1ecbnh (quy \u0111\u1ecbnh t\u1eeb 6 \u0111\u1ebfn 6.5, g\u1ed7 tr\u00e0m l\u1edbn h\u01a1n 7).<\/p>\n

*\/ T\u1ea1o v\u00e1n d\u0103m g\u1ed7 tr\u00e0m:<\/i><\/p>\n

Ti\u1ebfn h\u00e0nh t\u1ea1o v\u00e1n d\u0103m g\u1ed7 tr\u00e0m theo c\u00e1c c\u00f4ng th\u1ee9c t\u1ea1o v\u00e1n kh\u00e1c nhau. Ti\u1ebfn h\u00e0nh c\u1eaft m\u1eabu v\u00e0 d\u1ef1a v\u00e0o TCVN 7754 : 2007 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e1n. K\u1ebft qu\u1ea3 nh\u01b0 sau:<\/p>\n

B\u1ea3ng 3.5. Ch\u1ea5t l\u01b0\u1ee3ng v\u00e1n d\u0103m g\u1ed7 tr\u00e0m<\/p>\n\n\n\n\n\n\n\n\n
\n

TT<\/b><\/p>\n<\/td>\n

\n

T\u00ednh ch\u1ea5t<\/b><\/p>\n<\/td>\n

\n

\u0110\u01a1n v\u1ecb<\/b><\/p>\n<\/td>\n

\n

TCVN<\/b><\/p>\n<\/td>\n

\n

K\u1ebft qu\u1ea3<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

\n

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

\n

T 5<\/b><\/p>\n<\/td>\n

\n

T 10<\/b><\/p>\n<\/td>\n

\n

U5<\/b><\/p>\n<\/td>\n

\n

U7<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

\u0110\u1ed9 \u1ea9m<\/td>\n\n

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

\n

5 – 13<\/p>\n<\/td>\n

\n

5 – 13<\/p>\n<\/td>\n

\n

12.97<\/p>\n<\/td>\n

\n

12.30<\/p>\n<\/td>\n

\n

12.92<\/p>\n<\/td>\n

\n

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

\n

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

\u0110\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh<\/td>\n\n

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

\n

\u2265 11.5<\/p>\n<\/td>\n

\n

\u2265 14<\/p>\n<\/td>\n

\n

12.33<\/p>\n<\/td>\n

\n

13.38<\/p>\n<\/td>\n

\n

13.23<\/p>\n<\/td>\n

\n

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

\n

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

\u0110\u1ed9 b\u1ec1n k\u00e9o vu\u00f4ng g\u00f3c<\/td>\n\n

Mpa<\/p>\n<\/td>\n

\n

\u2265 \u00a00.24<\/p>\n<\/td>\n

\n

\u2265 0.45<\/p>\n<\/td>\n

\n

0.28<\/p>\n<\/td>\n

\n

0.32<\/p>\n<\/td>\n

\n

0.23<\/p>\n<\/td>\n

\n

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

\n

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

\u0110\u1ed9 tr\u01b0\u01a1ng n\u1edf chi\u1ec1u d\u00e0y<\/td>\n\n

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

\n

Kh\u00f4ng quy \u0111\u1ecbnh<\/p>\n<\/td>\n

\n

\u2264 14<\/p>\n<\/td>\n

\n

8.49<\/p>\n<\/td>\n

\n

9.06<\/p>\n<\/td>\n

\n

7.23<\/p>\n<\/td>\n

\n

9.92<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Trong \u0111\u00f3: P1 \u2013 v\u00e1n d\u0103m th\u00f4ng d\u1ee5ng s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n kh\u00f4; P3 \u2013 v\u00e1n d\u0103m kh\u00f4ng ch\u1ecbu t\u1ea3i s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n \u1ea9m; T5, T10 \u2013 v\u00e1n d\u0103m g\u1ed7 tr\u00e0m ta 5 tu\u1ed5i v\u00e0 10 tu\u1ed5i; U5, U7 \u2013 v\u00e1n d\u0103m g\u1ed7 tr\u00e0m \u00fac 5 tu\u1ed5i v\u00e0 7 tu\u1ed5i.<\/p>\n

Nh\u1eadn x\u00e9t: K\u1ebft qu\u1ea3 b\u1ea3ng 3.5 cho th\u1ea5y: v\u00e1n d\u0103m l\u00e0m t\u1eeb nguy\u00ean li\u1ec7u g\u1ed7 tr\u00e0m (100 %) ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c so v\u1edbi TCVN 7754 : 2007 (P1) v\u1ec1\u00a0 v\u00e1n d\u0103m th\u00f4ng d\u1ee5ng s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n kh\u00f4. Nh\u01b0ng n\u1ebfu so v\u1edbi TCVN 7754 : 2007 (P3) v\u1ec1\u00a0 v\u00e1n d\u0103m kh\u00f4ng ch\u1ecbu t\u1ea3i s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n \u1ea9m th\u00ec v\u00e1n d\u0103m g\u1ed7 tr\u00e0m ch\u01b0a \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/p>\n

\u0110\u1ec3 n\u00e2ng cao \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o vu\u00f4ng g\u00f3c c\u1ee7a v\u00e1n d\u0103m g\u1ed7 tr\u00e0m, \u0111\u1ec1 t\u00e0i ch\u1ecdn h\u01b0\u1edbng nghi\u00ean c\u1ee9u: pha tr\u1ed9n h\u1ed7n h\u1ee3p d\u0103m g\u1ed7 tr\u00e0m v\u1edbi d\u0103m g\u1ed7 keo lai theo t\u1ef7 l\u1ec7 pha tr\u1ed9n kh\u00e1c nhau \u0111\u00f3 l\u00e0: D\u0103m g\u1ed7 tr\u00e0m\/d\u0103m g\u1ed7 keo lai = 60\/40; 70\/30; 80\/20 (%).<\/p>\n

B\u1ea3ng 3.6. Ch\u1ea5t l\u01b0\u1ee3ng v\u00e1n d\u0103m t\u1eeb h\u1ed7n h\u1ee3p g\u1ed7 tr\u00e0m v\u00e0 g\u1ed7 keo lai<\/p>\n\n\n\n\n\n\n\n\n
\n

TT<\/b><\/p>\n<\/td>\n

\n

T\u00ednh ch\u1ea5t<\/b><\/p>\n<\/td>\n

\n

\u0110\u01a1n v\u1ecb<\/b><\/p>\n<\/td>\n

\n

TCVN<\/b><\/p>\n<\/td>\n

\n

K\u1ebft qu\u1ea3<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

P1<\/b><\/p>\n<\/td>\n

\n

P3<\/b><\/p>\n<\/td>\n

\n

TN0<\/b><\/p>\n<\/td>\n

\n

TN1<\/b><\/p>\n<\/td>\n

\n

TN2<\/b><\/p>\n<\/td>\n

\n

TN3<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

\u0110\u1ed9 \u1ea9m<\/td>\n\n

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

\n

5 \u2013 13<\/p>\n<\/td>\n

\n

5 –\u00a0 13<\/p>\n<\/td>\n

\n

9,97<\/p>\n<\/td>\n

\n

10,75<\/p>\n<\/td>\n

\n

10,61<\/p>\n<\/td>\n

\n

10,97<\/p>\n<\/td>\n<\/tr>\n

\n

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

\u0110\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh<\/td>\n\n

MPa<\/p>\n<\/td>\n

\n

\u2265 11,5<\/p>\n<\/td>\n

\n

\u2265 14<\/p>\n<\/td>\n

\n

11,91<\/p>\n<\/td>\n

\n

14,13<\/p>\n<\/td>\n

\n

12,01<\/p>\n<\/td>\n

\n

13,40<\/p>\n<\/td>\n<\/tr>\n

\n

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

\u0110\u1ed9 b\u1ec1n k\u00e9o vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t v\u00e1n<\/td>\n\n

MPa<\/p>\n<\/td>\n

\n

\u2265 0,24<\/p>\n<\/td>\n

\n

\u2265 0,45<\/p>\n<\/td>\n

\n

0,41<\/p>\n<\/td>\n

\n

0,47<\/p>\n<\/td>\n

\n

0,44<\/p>\n<\/td>\n

\n

0,43<\/p>\n<\/td>\n<\/tr>\n

\n

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

\u0110\u1ed9 tr\u01b0\u01a1ng n\u1edf chi\u1ec1u d\u00e0y<\/td>\n\n

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

\n

Kh\u00f4ng<\/p>\n

quy \u0111\u1ecbnh<\/p>\n<\/td>\n

\n

\u2264 14<\/p>\n<\/td>\n

\n

10,41<\/p>\n<\/td>\n

\n

7,36<\/p>\n<\/td>\n

\n

7,73<\/p>\n<\/td>\n

\n

10,23<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Trong \u0111\u00f3: TN0 \u2013 T\u1ef7 l\u1ec7 d\u0103m g\u1ed7 tr\u00e0m l\u00e0 100 (%);TN1 \u2013T\u1ef7 l\u1ec7 pha tr\u1ed9n gi\u1eefa d\u0103m g\u1ed7 tr\u00e0m v\u1edbi d\u0103m g\u1ed7 keo lai l\u00e0: 60\/40 (%); TN2 \u2013T\u1ef7 l\u1ec7 pha tr\u1ed9n gi\u1eefa d\u0103m g\u1ed7 tr\u00e0m v\u1edbi d\u0103m g\u1ed7 keo lai l\u00e0: 70\/30 (%);TN3 \u2013T\u1ef7 l\u1ec7 pha tr\u1ed9n gi\u1eefa d\u0103m g\u1ed7 tr\u00e0m v\u1edbi d\u0103m g\u1ed7 keo lai l\u00e0: 80\/20 (%).<\/p>\n

K\u1ebft qu\u1ea3 b\u1ea3ng 3.8 cho th\u1ea5y: v\u00e1n d\u0103m t\u1ea1o ra t\u1eeb TN1 (t\u1ef7 l\u1ec7 pha tr\u1ed9n gi\u1eefa d\u0103m g\u1ed7 tr\u00e0m\/d\u0103m g\u1ed7 keo lai l\u00e0 60\/40) c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c so v\u1edbi ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN (P3) – v\u00e1n d\u0103m kh\u00f4ng ch\u1ecbu t\u1ea3i s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n \u1ea9m.<\/p>\n

 <\/p>\n

3.4. <\/b>S\u01a1 b\u1ed9 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m theo h\u01b0\u1edbng: \u201c S\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p\u201d.<\/b><\/b><\/p>\n

M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n c\u1ee7a s\u1ef1 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng tr\u00e0m \u1edf \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long l\u00e0 gi\u00e1 thu mua s\u1ea3n ph\u1ea9m g\u1ed7 tr\u00e0m lu\u00f4n c\u00f3 xu h\u01b0\u1edbng gi\u1ea3m d\u1ea7n: gi\u00e1 b\u00e1n c\u1eeb gi\u1ea3m 26,6% (S\u1ea3n ph\u1ea9m c\u1eeb 5, lo\u1ea1i 2 n\u0103m 2003 gi\u00e1 b\u00e1n 15.000 \u0111\u1ed3ng\/c\u00e2y; n\u0103m 2006 gi\u00e1 b\u00e1n ch\u1ec9 c\u00f2n 11.000 \u0111\u1ed3ng\/c\u00e2y.). Gi\u00e1\u00a0 mua 1 ha r\u1eebng tr\u00e0m gi\u1ea3m 55% (n\u0103m 2003: 50 tri\u1ec7u \u0111\u1ed3ng\/ha; n\u0103m 2006 gi\u1ea3m c\u00f2n kho\u1ea3ng 22 tri\u1ec7u \u0111\u1ed3ng\/ ha – t\u1ea1i C\u00e0 Mau). V\u00ec th\u1ebf v\u1ea5n \u0111\u1ec1 \u0111a d\u1ea1ng h\u00f3a s\u1ea3n ph\u1ea9m ch\u1ebf bi\u1ebfn t\u1eeb g\u1ed7 tr\u00e0m l\u00e0 gi\u1ea3i ph\u00e1p gi\u00fap n\u00e2ng cao gi\u00e1 tr\u1ecb r\u1eebng tr\u00e0m m\u00e0 c\u1ee5 th\u1ec3 l\u00e0 n\u00e2ng cao thu nh\u1eadp c\u1ee7a ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng.<\/p>\n

V\u1edbi c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u nh\u01b0 \u0111\u00e3 tr\u00ecnh b\u00e0y \u1edf ph\u1ea7n tr\u00ean, gi\u1ea3i ph\u00e1p s\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p g\u1ed7 r\u1eebng tr\u00e0m l\u00e0:<\/p>\n

1\/ \u01afu ti\u00ean cho s\u1ea3n ph\u1ea9m \u0111\u1ea1t ti\u00eau chu\u1ea9n l\u00e0 c\u1eeb tr\u00e0m c\u00f3 gi\u00e1 tr\u1ecb v\u00e0 s\u1ee9c ti\u00eau th\u1ee5 l\u1edbn tr\u00ean th\u1ecb tr\u01b0\u1eddng.<\/p>\n

2\/ S\u1eed d\u1ee5ng \u201cl\u00f3ng g\u1ed7\u201d c\u00f3 \u0111\u01b0\u1eddng k\u00ednh tr\u00ean 10 cm, d\u00e0i 1,2 m (kh\u00f4ng k\u1ec3 v\u1ecf) cho s\u1ea3n xu\u1ea5t g\u1ed7 x\u1ebb (v\u00e1n gh\u00e9p kh\u1ed1i, v\u00e1n gh\u00e9p thanh..)<\/p>\n

3\/ S\u1eed d\u1ee5ng s\u1ea3n ph\u1ea9m g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 6 cm \u0111\u1ebfn 10 cm l\u00e0m nguy\u00ean li\u1ec7u b\u0103m d\u0103m (cho s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m, v\u00e1n MDF, l\u00e0m nguy\u00ean li\u1ec7u gi\u1ea5y ho\u1eb7c xu\u1ea5t kh\u1ea9u)<\/p>\n

4\/ S\u1ea3n ph\u1ea9m c\u00f3 \u0111\u01b0\u1eddng k\u00ednh d\u01b0\u1edbi 6 cm cung c\u1ea5p cho s\u1ea3n xu\u1ea5t than, l\u00e0m c\u1ee7i\u2026<\/p>\n

Theo s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra n\u0103m 2006 t\u1ea1i C\u00e0 Mau, v\u1edbi r\u1eebng tr\u00e0m 10 tu\u1ed5i (tr\u00e0m ta, M.cajuputi<\/i>) t\u1ef7 l\u1ec7 c\u00e1c s\u1ea3n ph\u1ea9m ch\u00ednh (tr\u00ean 1 ha) nh\u01b0 sau: C\u1eeb chi\u1ebfm 12%, l\u00f3ng 5%, kho\u1ea3ng 68% g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh t\u1eeb 6 cm \u0111\u1ebfn d\u01b0\u1edbi 10 cm c\u00f3 th\u1ec3 l\u00e0m nguy\u00ean li\u1ec7u b\u0103m d\u0103m g\u1ed7; ph\u1ea7n c\u00f2n l\u1ea1i g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 3 \u0111\u1ebfn 6 cm l\u00e0m c\u1ee7i v\u00e0 h\u1ea7m than. Th\u00f4ng th\u01b0\u1eddng m\u1eadt \u0111\u1ed9 c\u00e2y \u1edf c\u1ea5p tu\u1ed5i n\u00e0y c\u00f2n kho\u1ea3ng 10.000 c\u00e2y\/ha.<\/p>\n

C\u0103n c\u1ee9 theo th\u1eddi gi\u00e1 n\u0103m 2007. Thu nh\u1eadp t\u1eeb b\u00e1n g\u1ed7 tr\u00e0m theo 2 ph\u01b0\u01a1ng \u00e1n \u0111\u01b0\u1ee3c so s\u00e1nh nh\u01b0 sau:<\/p>\n

B\u1ea3ng 3.7. Ph\u01b0\u01a1ng \u00e1n l\u00e0m c\u1eeb v\u00e0 h\u1ea7m than, b\u00e1n c\u1ee7i, v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng<\/p>\n\n\n\n\n\n\n
\n

Lo\u1ea1i s\u1ea3n ph\u1ea9m<\/b><\/p>\n<\/td>\n

\n

T\u1ec9 l\u1ec7<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 l\u01b0\u1ee3ng<\/b><\/p>\n<\/td>\n

\n

\u0110\u01a1n gi\u00e1<\/b><\/p>\n<\/td>\n

\n

Th\u00e0nh ti\u1ec1n<\/b><\/p>\n<\/td>\n<\/tr>\n

C\u1eeb (c\u1eeb 5 lo\u1ea1i 2)<\/td>\n12%<\/td>\n1.200 c\u00e2y<\/td>\n11000 \u0111\u1ed3ng\/c\u00e2y<\/td>\n\n

13.200.000 \u0111\u1ed3ng<\/p>\n<\/td>\n<\/tr>\n

G\u1ed7 c\u1ee7i, than, VLXD<\/td>\n88%<\/td>\n30 t\u1ea5n<\/td>\n320000 \u0111\u1ed3ng\/t\u1ea5n<\/td>\n\n

9.600.000 \u0111\u1ed3ng<\/p>\n<\/td>\n<\/tr>\n

\n

T\u1ed5ng<\/b><\/p>\n<\/td>\n

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

22.800.000 \u0111\u1ed3ng<\/b><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ea3ng 3.8. Ph\u01b0\u01a1ng \u00e1n s\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p<\/p>\n\n\n\n\n\n\n\n\n
\n

Lo\u1ea1i s\u1ea3n ph\u1ea9m<\/b><\/p>\n<\/td>\n

\n

T\u1ec9 l\u1ec7<\/b><\/p>\n<\/td>\n

\n

S\u1ed1 l\u01b0\u1ee3ng<\/b><\/p>\n<\/td>\n

\n

\u0110\u01a1n gi\u00e1<\/b><\/p>\n<\/td>\n

\n

Th\u00e0nh ti\u1ec1n<\/b><\/p>\n<\/td>\n<\/tr>\n

C\u1eeb (c\u1eeb 5 lo\u1ea1i 2)<\/td>\n12%<\/td>\n1.200 c\u00e2y<\/td>\n11.000 \u0111\u1ed3ng\/c\u00e2y<\/td>\n\n

13.200.000 \u0111\u1ed3ng<\/p>\n<\/td>\n<\/tr>\n

L\u00f3ng (g\u1ed7 x\u1ebb)<\/td>\n5%<\/td>\n500 l\u00f3ng<\/td>\n12.000 \u0111\u1ed3ng\/c\u00e2y<\/td>\n\n

6.000.000 \u0111\u1ed3ng<\/p>\n<\/td>\n<\/tr>\n

Nguy\u00ean li\u1ec7u b\u0103m d\u0103m<\/td>\n68%<\/td>\n22 t\u1ea5n<\/td>\n400.000 \u0111\u1ed3ng\/t\u1ea5n<\/td>\n\n

8.000.000 \u0111\u1ed3ng<\/p>\n<\/td>\n<\/tr>\n

C\u1ee7i, than<\/td>\n17%<\/td>\n1,3 t\u1ea5n<\/td>\n100.000 \u0111\u1ed3ng\/t\u1ea5n<\/td>\n\n

1.300.000 \u0111\u1ed3ng<\/p>\n<\/td>\n<\/tr>\n

\n

T\u1ed5ng<\/b><\/p>\n<\/td>\n

\n

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

\n

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

\n

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

\n

28.500.000 \u0111\u1ed3ng<\/b><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(Ghi ch\u00fa: S\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c \u0111i\u1ec1u tra t\u1ea1i c\u00e1c v\u00f9ng C\u00e0 Mau, Ki\u00ean Giang 2007)<\/p>\n

V\u1edbi k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch nh\u01b0 tr\u00ecnh b\u00e0y \u1edf b\u1ea3ng 3.7 v\u00e0 b\u1ea3ng 3.8 cho th\u1ea5y: m\u1ed7i ha r\u1eebng tr\u00e0m, theo h\u01b0\u1edbng s\u1eed d\u1ee5ng t\u1ed5ng h\u1ee3p, ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng \u0111\u00e3 c\u00f3 th\u1ec3 c\u00f3 th\u00eam thu nh\u1eadp 5.700.000 \u0111\u1ed3ng\/1 ha so v\u1edbi ph\u01b0\u01a1ng \u00e1n s\u1eed d\u1ee5ng truy\u1ec1n th\u1ed1ng hi\u1ec7n nay.<\/p>\n

 <\/p>\n

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

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

(iv) K\u1ebft lu\u1eadn v\u00e0 \u0111\u1ec1 ngh\u1ecb<\/b><\/p>\n

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

– C\u00e2y tr\u00e0m \u1edf tu\u1ed5i khai th\u00e1c (5 \u2013 7 n\u0103m) c\u00f3 \u0111\u01b0\u1eddng k\u00ednh (D1.3) dao \u0111\u1ed9ng trong kh\u1ea3ng t\u1eeb 6 \u2013 10 cm. C\u00e2y tr\u00e0m \u1edf c\u1ea5p tu\u1ed5i l\u1edbn h\u01a1n 10 tu\u1ed5i c\u00f3 \u0111\u01b0\u1eddng k\u00ednh (D1.3) dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 10 \u2013 15 cm. G\u1ed7 tr\u00e0m c\u00f3 t\u1ef7 l\u1ec7 v\u1ecf nhi\u1ec1uchi\u1ebfm kho\u1ea3ng 15 %. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch dao \u0111\u1ed9ng t\u1eeb 0.5 \u2013 0.55 g\/cm3<\/sup>.<\/p>\n

– G\u1ed7 tr\u00f2n g\u1ed7 tr\u00e0m kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u c\u1ee7a nguy\u00ean li\u1ec7u l\u00e0m g\u1ed7 x\u1ebb \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c do g\u1ed7 tr\u00e0m c\u00f3 \u0111\u01b0\u1eddng k\u00ednh b\u00e9, kh\u00fac g\u1ed7 tr\u00f2n c\u00f3 \u0111\u1ed9 cong, \u0111\u1ed9 thon, \u0111\u1ed9 \u00f4 van l\u1edbn. Tuy nhi\u00ean c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn nh\u1eefng kh\u00fac g\u1ed7 tr\u00f2n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n 15 cm, t\u01b0\u01a1ng \u0111\u1ed1i th\u1eb3ng v\u00e0 tr\u00f2n \u0111\u1ec1u \u0111\u1ec3 l\u00e0m g\u1ed7 x\u1ebb s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c. G\u1ed7 x\u1ebb g\u1ed7 tr\u00e0m c\u00f3 t\u1ef7 l\u1ec7 co r\u00fat theo c\u00e1c chi\u1ec1u xuy\u00ean t\u00e2m, ti\u1ebfp tuy\u1ebfn v\u00e0 d\u1ecdc th\u1edb r\u1ea5t l\u1edbn. Khi x\u1eed l\u00fd b\u1eb1ng dung d\u1ecbch thu\u1ed1c PEG600 c\u00f3 n\u1ed3ng \u0111\u1ed9 l\u00e0 30 (%), th\u1eddi gian ng\u00e2m l\u00e0 6 gi\u1edd, nhi\u1ec7t \u0111\u1ed9 dung d\u1ecbch khi ng\u00e2m l\u00e0 300<\/sup> C \u0111\u00e3 cho k\u1ebft qu\u1ea3 t\u1ed1t. Sau khi x\u1eed l\u00fd b\u1eb1ng dung d\u1ecbch thu\u1ed1c PEG600 t\u1ef7 l\u1ec7 co r\u00fat theo chi\u1ec1u ti\u1ebfp tuy\u1ebfn t\u1eeb 23.2 %\u00a0 gi\u1ea3m xu\u1ed1ng c\u00f2n 4.133 %, t\u1ef7 l\u1ec7 co r\u00fat theo chi\u1ec1u xuy\u00ean t\u00e2m t\u1eeb 11.2 % gi\u1ea3m xu\u1ed1ng c\u00f2n 2.898 %, t\u1ef7 l\u1ec7 co r\u00fat theo chi\u1ec1u d\u1ecdc th\u1edb t\u1eeb 1.4 % gi\u1ea3m xu\u1ed1ng c\u00f2n 0.326 %. L\u1ef1c b\u00e1m d\u00ednh c\u1ee7a g\u1ed7 tr\u00e0m v\u1edbi keo PVAc l\u00e0: 11.09 Mpa. L\u1ef1c b\u00e1m d\u00ednh n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi l\u1ef1c b\u00e1m d\u00ednh c\u1ee7a c\u00e1c lo\u1ea1i g\u1ed7 r\u1eebng tr\u1ed3ng kh\u00e1c nh\u01b0 keo ho\u1eb7c b\u1ea1ch \u0111\u00e0n.<\/p>\n

– G\u1ed7 tr\u00e0m c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m. T\u00f9y v\u00e0o m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ee7a s\u1ea3n ph\u1ea9m v\u00e1n d\u0103m g\u1ed7 tr\u00e0m \u0111\u1ec3 s\u1eed d\u1ee5ng t\u1ef7 l\u1ec7 d\u0103m g\u1ed7 tr\u00e0m cho h\u1ee3p l\u00fd. N\u1ebfu s\u1eed d\u1ee5ng 100 % nguy\u00ean li\u1ec7u g\u1ed7 tr\u00e0m l\u00e0m v\u00e1n d\u0103m th\u00ec s\u1ea3n ph\u1ea9m v\u00e1n d\u0103m t\u1eeb g\u1ed7 tr\u00e0m \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u c\u1ee7a v\u00e1n d\u0103m th\u00f4ng d\u1ee5ng s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n kh\u00f4. Khi s\u1eed d\u1ee5ng s\u1ea3n ph\u1ea9m l\u00e0m v\u00e1n d\u0103m kh\u00f4ng ch\u1ecbu t\u1ea3i s\u1eed d\u1ee5ng \u1edf \u0111i\u1ec1u ki\u1ec7n \u1ea9m th\u00ec c\u1ea7n pha tr\u1ed9n t\u1ef7 l\u1ec7 d\u0103m g\u1ed7 tr\u00e0m\/d\u0103m g\u1ed7 keo lai theo t\u1ef7 l\u1ec7 l\u00e0: 60\/40 (%).<\/p>\n

4.2. \u0110\u1ec1 ngh\u1ecb<\/b><\/p>\n

– Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m l\u00e0m v\u00e1n MDF;<\/p>\n

– G\u1ed7 tr\u00e0m sau khai th\u00e1c n\u00ean s\u1eed d\u1ee5ng theo h\u01b0\u1edbng t\u1ed5ng h\u1ee3p, \u0111\u00f3 l\u00e0: l\u00e0m c\u1eeb (s\u1ea3n ph\u1ea9m truy\u1ec1n th\u1ed1ng); l\u1ef1a ch\u1ecdn nh\u1eefng kh\u00fac g\u1ed7 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn, tr\u00f2n, th\u1eb3ng \u0111\u1ec3 l\u00e0m g\u1ed7 x\u1ebb (x\u1ebb nan, v\u00e1n gh\u00e9p thanh, gh\u00e9p kh\u1ed1i); b\u0103m d\u0103m (l\u00e0m v\u00e1n d\u0103m, v\u00e1n MDF); l\u00e0m c\u1ee7i h\u1ea7m than.<\/p>\n

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

(v) T\u00e0i li\u1ec7u tham kh\u1ea3o <\/b><\/p>\n

1. Nguy\u1ec5n Quang Trung (2006), Ph\u00e2n t\u00edch m\u1ed9t s\u1ed1 \u0111\u1eb7c t\u00ednh ch\u1ee7 y\u1ebfu c\u1ee7a g\u1ed7 tr\u00e0m v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m, v\u00e1n gh\u00e9p thanh<\/i>. Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam.<\/p>\n

2. B\u00f9i Duy Ng\u1ecdc (2008), Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng h\u1ed7n h\u1ee3p nguy\u00ean li\u1ec7u g\u1ed7 tr\u00e0m M.cajuputy v\u00e0 g\u1ed7 keo lai A. hybrid \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m<\/i>. Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n

3. B\u00f9i Duy Ng\u1ecdc (2009). Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng d\u01b0 gia c\u00f4ng cho kh\u00e2u s\u1ea5y c\u1ee7a g\u1ed7 x\u1ebb g\u1ed7 tr\u00e0m (Melaleuca cajuputi). Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam.<\/p>\n

4. Masatoshi Sato. (2005). Development of Melaleuca wood utilization technology. The case of wood cement board and block.<\/i> Workshop on Melaleuca wood utilization development \u2013 Ho Chi Minh City<\/p>\n

5. Masatoshi Sato (2005). \u201cDevelopment of Melaleuca wood utilizati on technology \u2013 The case of wood cement board and block\u201d<\/i>. A report in the worshop on Melaleuca wood utilization development \u2013 Ho Chi Minh City.<\/p>\n","protected":false},"excerpt":{"rendered":"

TS. B\u00f9i Duy Ng\u1ecdc \u00a0(i) \u0110\u1eb6T V\u1ea4N \u0110\u1ec0   \u0110\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long v\u1edbi 2 h\u1ec7 sinh th\u00e1i r\u1eebng r\u1ea5t quan tr\u1ecdng l\u00e0: h\u1ec7 sinh th\u00e1i r\u1eebng ng\u1eadp m\u1eb7n v\u00e0 h\u1ec7 sinh th\u00e1i r\u1eebng tr\u00e0m. H\u1ec7 sinh th\u00e1i r\u1eebng tr\u00e0m ph\u00e1t tri\u1ec3n tr\u00ean v\u00f9ng ng\u1eadp n\u01b0\u1edbc n\u1ed9i \u0111\u1ecba v\u00e0 n\u01a1i \u0111\u1ea5t b\u1ecb ph\u00e8n c\u00f3 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14123"}],"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=14123"}],"version-history":[{"count":3,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14123\/revisions"}],"predecessor-version":[{"id":14132,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/14123\/revisions\/14132"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=14123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=14123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=14123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}