{"id":8557,"date":"2009-03-24T02:11:12","date_gmt":"2009-03-23T19:11:12","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/nghien-cuu-ky-thuat-phuc-hoi-nuoi-duong-rung-tu-nhien-la-rong-vung-bac-tay-nguyen\/"},"modified":"2019-09-25T10:28:22","modified_gmt":"2019-09-25T03:28:22","slug":"nghien-cuu-ky-thuat-phuc-hoi-nuoi-duong-rung-tu-nhien-la-rong-vung-bac-tay-nguyen","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-ky-thuat-phuc-hoi-nuoi-duong-rung-tu-nhien-la-rong-vung-bac-tay-nguyen\/","title":{"rendered":"Nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt ph\u1ee5c h\u1ed3i nu\u00f4i d\u01b0\u1ee1ng r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng v\u00f9ng B\u1eafc T\u00e2y Nguy\u00ean"},"content":{"rendered":"

H\u1ed3 \u0110\u1ee9c Soa, Tr\u1ea7n K\u1ebf L\u00e2m, <\/em><\/p>\n

Nguy\u1ec5n Thanh Xu\u00e2n<\/em><\/p>\n

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

R\u1eebng t\u1ef1 nhi\u00ean \u0111\u00f3ng vai tr\u00f2 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi \u0111\u1eddi s\u1ed1ng con ng\u01b0\u1eddi. Ngo\u00e0i vi\u1ec7c cung c\u1ea5p g\u1ed7, c\u1ee7i v\u00e0 l\u00e2m \u0111\u1eb7c s\u1ea3n kh\u00e1c, ch\u00fang c\u00f2n gi\u1eef vai tr\u00f2 ph\u00f2ng h\u1ed9, ch\u1ed1ng x\u00f3i m\u00f2n, r\u1eeda tr\u00f4i, \u0111i\u1ec1u ho\u00e0 kh\u00ed h\u1eadu v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng\u2026<\/p>\n

R\u1eebng t\u1ef1 nhi\u00ean \u0111\u00e3 v\u00e0 \u0111ang b\u1ecb t\u00e0n ph\u00e1 n\u1eb7ng n\u1ec1, nh\u1ea5t l\u00e0 t\u1eeb 1975 tr\u1edf l\u1ea1i \u0111\u00e2y. Theo s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea 1999, r\u1eebng t\u1ef1 nhi\u00ean n\u01b0\u1edbc ta c\u00f3 kho\u1ea3ng 9,44 tri\u1ec7u ha v\u1edbi tr\u1eef l\u01b0\u1ee3ng kho\u1ea3ng 720 tri\u1ec7u m3<\/sup>, chi\u1ebfm 96% tr\u1eef l\u01b0\u1ee3ng g\u1ed7 c\u1ea3 n\u01b0\u1edbc. So v\u1edbi n\u0103m 1992, r\u1eebng t\u1ef1 nhi\u00ean t\u0103ng 0,8 tri\u1ec7u ha (9,5%) do th\u1ef1c hi\u1ec7n \u0111\u1ecbnh canh, \u0111\u1ecbnh c\u01b0; giao kho\u00e1n khoanh nu\u00f4i, b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng theo c\u00e1c d\u1ef1 \u00e1n 327 hay 661 v\u00e0 \u01b0u ti\u00ean ph\u00e1t tri\u1ec3n tr\u1ea1ng tr\u1ea1i v\u01b0\u1eddn r\u1eebng.<\/p>\n

B\u1eafc T\u00e2y Nguy\u00ean tr\u01b0\u1edbc \u0111\u00e2y l\u00e0 khu r\u1eebng t\u1ef1 nhi\u00ean gi\u00e0u v\u00e0 \u0111a d\u1ea1ng, c\u00f3 t\u1ed5 th\u00e0nh v\u00e0 c\u1ea5u tr\u00fac r\u1ea5t ph\u1ee9c t\u1ea1p nh\u01b0ng hi\u1ec7n nay \u0111\u00e3 gi\u1ea3m m\u1ea1nh v\u1ec1 c\u1ea3 di\u1ec7n t\u00edch, tr\u1eef l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng do nhi\u1ec1u nguy\u00ean nh\u00e2n. Trong nh\u1eefng nguy\u00ean nh\u00e2n ch\u00ednh, c\u00f3 nguy\u00ean nh\u00e2n v\u1ec1 k\u1ef9 thu\u1eadt nh\u01b0: vi\u1ec7c khai th\u00e1c ch\u01b0a \u0111\u1ea3m b\u1ea3o t\u00e1i sinh, ch\u1eb7t \u0111i v\u00e9t l\u1ea1i l\u1ea5y h\u1ebft c\u00e1c c\u00e2y c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf, ph\u1ee5c h\u1ed3i nu\u00f4i d\u01b0\u1ee1ng r\u1eebng ch\u01b0a c\u00f3 k\u1ebft qu\u1ea3 cao, c\u1ed9ng th\u00eam s\u1ef1 di d\u00e2n \u1ed3 \u1ea1t, khai hoang l\u1ea5y \u0111\u1ea5t l\u00e0m n\u00f4ng nghi\u1ec7p, tr\u1ed3ng c\u00e2y c\u00f4ng nghi\u1ec7p . . .<\/p>\n

\u0110\u1ec3 kh\u00f4i ph\u1ee5c l\u1ea1i r\u1eebng t\u1ef1 nhi\u00ean, m\u1ed9t h\u1ec7 th\u1ed1ng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt, quy ph\u1ea1m khai th\u00e1c, nu\u00f4i d\u01b0\u1ee1ng, khoanh nu\u00f4i, x\u00fac ti\u1ebfn t\u00e1i sinh \u0111\u1ebfn tr\u1ed3ng m\u1edbi \u0111ang \u0111\u01b0\u1ee3c tri\u1ec3n khai \u00e1p d\u1ee5ng \u0111\u00e3 mang l\u1ea1i hi\u1ec7u qu\u1ea3 cao h\u01a1n. Tuy v\u1eady, c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt tr\u00ean mang t\u00ednh ch\u1ea5t nguy\u00ean t\u1eafc v\u00e0 ch\u1ec9 \u0111\u1ea1o chung, r\u1ea5t kh\u00f3 \u00e1p d\u1ee5ng cho t\u1eebng v\u00f9ng sinh th\u00e1i c\u1ee5 th\u1ec3. \u0110\u1ed1i v\u1edbi v\u00f9ng B\u1eafc T\u00e2y Nguy\u00ean, r\u1eebng t\u1ef1 nhi\u00ean c\u00e2y l\u00e1 r\u1ed9ng phong ph\u00fa v\u00e0 \u0111a d\u1ea1ng, c\u00f3 t\u1ed5 th\u00e0nh, c\u1ea5u tr\u00fac r\u1ea5t ph\u1ee9c t\u1ea1p, c\u1ea7n ph\u1ea3i \u0111\u1ea7u t\u01b0 nhi\u1ec1u c\u00f4ng s\u1ee9c v\u00e0 ti\u1ec1n c\u1ee7a \u0111\u1ec3 nghi\u00ean c\u1ee9u c\u1ee5 th\u1ec3 v\u00e0 \u0111\u1ea7y \u0111\u1ee7 h\u01a1n, nh\u1ea5t l\u00e0 v\u1ea5n \u0111\u1ec1 ph\u1ee5c h\u1ed3i v\u00e0 nu\u00f4i d\u01b0\u1ee1ng nh\u1eb1m n\u00e2ng cao n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 ph\u00e1t huy t\u00e1c d\u1ee5ng nhi\u1ec1u m\u1eb7t c\u1ee7a khu r\u1eebng hi\u1ec7n c\u00f3.<\/p>\n

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

1. M\u1ee5c ti\u00eau nghi\u00ean c\u1ee9u<\/em><\/p>\n

– Nghi\u00ean c\u1ee9u t\u00ecm gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt c\u1ee5 th\u1ec3 nu\u00f4i d\u01b0\u1ee1ng r\u1eebng nh\u1eb1m b\u1ed5 sung quy ph\u1ea1m cho hai \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng nu\u00f4i d\u01b0\u1ee1ng: R\u1eebng t\u1ef1 nhi\u00ean c\u00e2y l\u00e1 r\u1ed9ng ph\u1ee5c h\u1ed3i sau khai th\u00e1c v\u00e0 sau n\u01b0\u01a1ng r\u1eaby.<\/p>\n

– X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh \u0111\u1ec3 ch\u1ee9ng minh.<\/p>\n

2. N\u1ed9i dung nghi\u00ean c\u1ee9u <\/em><\/p>\n

– T\u1ed5ng k\u1ebft \u0111\u00e1nh gi\u00e1 c\u00e1c m\u00f4 h\u00ecnh nghi\u00ean c\u1ee9u v\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 c\u00f3 trong v\u00f9ng.<\/p>\n

– Ph\u00e2n chia hi\u1ec7n tr\u1ea1ng r\u1eebng c\u1ea7n nu\u00f4i d\u01b0\u1ee1ng.<\/p>\n

– X\u00e2y d\u1ef1ng gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt v\u00e0 m\u00f4 h\u00ecnh.<\/p>\n

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

– S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra kh\u1ea3o s\u00e1t k\u1ebft h\u1ee3p v\u1edbi l\u00e2m sinh th\u1ef1c nghi\u1ec7m, k\u1ebf th\u1eeba c\u00f3 ch\u1ecdn l\u1ecdc, ph\u00e2n t\u00edch \u0111\u00e1nh gi\u00e1 k\u1ebft qu\u1ea3 nh\u1eb1m r\u00fat ra nh\u1eefng t\u1ed3n t\u1ea1i xung quanh k\u1ef9 thu\u1eadt nu\u00f4i d\u01b0\u1ee1ng r\u1eebng t\u1ef1 nhi\u00ean \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng nghi\u00ean c\u1ee9u. C\u1ee5 th\u1ec3:<\/p>\n

+ \u1ee9ng d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u k\u1ebft h\u1ee3p gi\u1eefa truy\u1ec1n th\u1ed1ng v\u00e0 hi\u1ec7n \u0111\u1ea1i trong \u0111i\u1ec1u tra s\u1eed l\u00fd s\u1ed1 li\u1ec7u.<\/p>\n

+ \u1ee9ngd\u1ee5ng bi\u1ec7n ph\u00e1p ph\u00e2n lo\u1ea1i r\u1eebng hi\u1ec7n c\u00f3 \u0111\u1ec3 ph\u00e2n chia hi\u1ec7n tr\u1ea1ng r\u1eebng c\u1ea7n nu\u00f4i d\u01b0\u1ee1ng.<\/p>\n

+ S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea to\u00e1n h\u1ecdc trong l\u00e2m nghi\u1ec7p b\u1eb1ng ch\u01b0\u01a1ng tr\u00ecnh Excel 5.0 \u0111\u1ec3 ph\u00e2n t\u00edch \u0111\u00e1nh gi\u00e1 k\u1ebft qu\u1ea3.<\/p>\n

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

1. T\u1ed5ng k\u1ebft \u0111\u00e1nh gi\u00e1 c\u00e1c m\u00f4 h\u00ecnh nghi\u00ean c\u1ee9u v\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 c\u00f3<\/em><\/p>\n

1.1 M\u00f4 h\u00ecnh kh\u1ea3o nghi\u1ec7m \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 khai th\u00e1c \u0111\u1ebfn t\u00e1i sinh r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng<\/em><\/p>\n

– Tr\u00ean quan \u0111i\u1ec3m khai th\u00e1c l\u00e0 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u0111\u01b0a r\u1eebng \u0111\u1ea1t \u0111\u1ebfn m\u1ee5c ti\u00eau kinh t\u1ebf c\u00f3 hi\u1ec7u qu\u1ea3 cao, n\u0103m 1980 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam \u0111\u00e3 ch\u1ecdn v\u00e0 x\u00e2y d\u1ef1ng t\u1ea1i Trung t\u00e2m Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p (TNLN) Kon H\u00e0 N\u1eebng 2 m\u00f4 h\u00ecnh khai th\u00e1c v\u1edbi 2 c\u01b0\u1eddng \u0111\u1ed9 kh\u00e1c nhau: 50% v\u00e0 30% tr\u1eef l\u01b0\u1ee3ng. M\u1ed7i m\u00f4 h\u00ecnh 1 ha l\u1eb7p l\u1ea1i 1 l\u1ea7n v\u1edbi 4 \u00f4 th\u00ed nghi\u1ec7m tr\u00ean kho\u1ea3nh r\u1eebng nguy\u00ean sinh t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng nh\u1ea5t. \u0110\u00e2y l\u00e0 khu r\u1eebng c\u00f3 h\u1ec7 \u0111\u1ed9ng th\u1ef1c v\u1eadt \u0111a d\u1ea1ng v\u00e0 phong ph\u00fa, c\u00f3 nhi\u1ec1u nhi\u1ec1u lo\u00e0i g\u1ed7 c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf cao nh\u01b0 xoay, tr\u00e1m, gi\u1ed5i, g\u1ed9i, r\u1ebb, re, ch\u00f2\u2026 R\u1eebng c\u00f3 tr\u1eef l\u01b0\u1ee3ng 400 \u2014 500 m3<\/sup>\/ha, s\u1ed1 lo\u00e0i trong \u00f4 hi\u1ec7n c\u00f3 38 \u2014 45 lo\u00e0i\/ ha, d\u00e2y leo c\u00e2y b\u1ee5i ph\u00e1t tri\u1ec3n m\u1ea1nh, t\u00e1i sinh t\u1ef1 nhi\u00ean \u00edt.<\/p>\n

– Sau 20 n\u0103m khai th\u00e1c, s\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 4 ch\u1ec9 ti\u00eau ch\u1ee7 y\u1ebfu nh\u01b0 sau:<\/p>\n

+ Bi\u1ebfn \u0111\u1ed9ng v\u1ec1 t\u1ed5 th\u00e0nh lo\u00e0i<\/p>\n

+ Bi\u1ebfn \u0111\u1ed9ng v\u1ec1 c\u1ea5u tr\u00fac N\/D<\/p>\n

+ L\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng l\u00e2m ph\u1ea7n<\/p>\n

+ T\u00e1i sinh t\u1ef1 nhi\u00ean sau khai th\u00e1c<\/p>\n

– K\u1ebft qu\u1ea3:<\/p>\n

+ Bi\u1ebfn \u0111\u1ed9ng v\u1ec1 c\u1ea5u tr\u00fac N\/D:<\/p>\n

R\u1eebng nguy\u00ean sinh tr\u01b0\u1edbc khai th\u00e1c c\u00f3 c\u1ea5u tr\u00fac N\/D theo quy lu\u1eadt ph\u00e2n b\u1ed1 gi\u1ea3m c\u00f3 hai \u0111\u1ec9nh l\u1ec7ch ph\u1ea3i: \u0111\u1ec9nh 1 n\u1eb1m \u1edf c\u1ea5p D = 20 \u2014 24cm, \u0111\u1ec9nh 2 \u1edf c\u1ea5p D = 60 \u2014 80cm; sau khai th\u00e1c \u0111\u1ec9nh th\u1ee9 2 b\u1ecb xo\u00e1, r\u1eebng c\u00f3 c\u1ea5u tr\u00fac theo quy lu\u1eadt ph\u00e2n b\u1ed1 gi\u1ea3m 1 \u0111\u1ec9nh l\u1ec7ch ph\u1ea3i \u1edf c\u1ea5p D = 12 \u2014 16cm.<\/p>\n

V\u1ec1 s\u1ed1 c\u00e2y tr\u01b0\u1edbc v\u00e0 sau khai th\u00e1c 20 n\u0103m bi\u1ebfn \u0111\u1ed9ng t\u1eeb 365 c\u00e2y\/ ha l\u00ean 367 c\u00e2y\/ ha \u0111\u1ed1i v\u1edbi c\u00f4ng th\u1ee9c ch\u1eb7t 30% v\u00e0 372 c\u00e2y\/ ha l\u00ean 406 c\u00e2y\/ ha \u0111\u1ed1i v\u1edbi c\u00f4ng th\u1ee9c ch\u1eb7t 50% (bi\u1ec3u 1).<\/p>\n

Bi\u1ec3u 1. Bi\u1ebfn \u0111\u1ed9ng c\u1ea5u tr\u00fac N\/D tr\u01b0\u1edbc v\u00e0 sau khai th\u00e1c<\/em><\/p>\n\n\n\n\n\n
Ch\u1ec9 ti\u00eau<\/p>\n

c\u1ea5p D<\/td>\n

C\u00f4ng th\u1ee9c ch\u1eb7t 30% (I)<\/td>\nC\u00f4ng th\u1ee9c ch\u1eb7t 50% (II)<\/td>\n<\/tr>\n
Tr\u01b0\u1edbc khai th\u00e1c<\/td>\nSau khai th\u00e1c<\/td>\nTr\u01b0\u1edbc khai th\u00e1c<\/td>\nSau khai th\u00e1c<\/td>\n<\/tr>\n
12<\/p>\n

16<\/p>\n

20<\/p>\n

24<\/p>\n

28<\/p>\n

32<\/p>\n

36<\/p>\n

40<\/p>\n

44<\/p>\n

48<\/p>\n

52<\/p>\n

56<\/p>\n

60<\/p>\n

64<\/p>\n

68<\/p>\n

72<\/p>\n

76<\/p>\n

\u00b380<\/td>\n

22<\/p>\n

63<\/p>\n

42<\/p>\n

48<\/p>\n

30<\/p>\n

30<\/p>\n

20<\/p>\n

13<\/p>\n

20<\/p>\n

6<\/p>\n

3<\/p>\n

2<\/p>\n

4<\/p>\n

2<\/p>\n

2<\/p>\n

5<\/p>\n

4<\/p>\n

22<\/td>\n

74<\/p>\n

73<\/p>\n

47<\/p>\n

36<\/p>\n

28<\/p>\n

26<\/p>\n

12<\/p>\n

14<\/p>\n

12<\/p>\n

8<\/p>\n

7<\/p>\n

6<\/p>\n

6<\/p>\n

6<\/p>\n

1<\/p>\n

4<\/p>\n

11<\/p>\n

0<\/td>\n

30<\/p>\n

82<\/p>\n

48<\/p>\n

52<\/p>\n

36<\/p>\n

22<\/p>\n

17<\/p>\n

10<\/p>\n

9<\/p>\n

10<\/p>\n

5<\/p>\n

4<\/p>\n

7<\/p>\n

4<\/p>\n

2<\/p>\n

4<\/p>\n

3<\/p>\n

34<\/td>\n

97<\/p>\n

72<\/p>\n

52<\/p>\n

32<\/p>\n

24<\/p>\n

27<\/p>\n

22<\/p>\n

14<\/p>\n

13<\/p>\n

8<\/p>\n

9<\/p>\n

7<\/p>\n

11<\/p>\n

4<\/p>\n

2<\/p>\n

2<\/p>\n

0<\/p>\n

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

+ V\u1ec1 l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng V: m3<\/sup>\/ ha.<\/p>\n

– C\u00f4ng th\u1ee9c I (ch\u1eb7t 30%) l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n 6 m3<\/sup>\/ ha, t\u1ee9c 2,05%\/ n\u0103m. Hi\u1ec7n nay r\u1eebng \u0111\u1ea1t tr\u1eef l\u01b0\u1ee3ng b\u00ecnh qu\u00e2n ban \u0111\u1ea7u (450m3<\/sup>\/ha\/ 445m3<\/sup>\/ ha v\u00e0 442m3<\/sup>\/ha\/ 436m3<\/sup>\/ ha).<\/p>\n

– C\u00f4ng th\u1ee9c II (ch\u1eb7t 50%) t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n 5m3<\/sup>\/ ha, t\u1ee9c 1,73%\/ n\u0103m. Hi\u1ec7n t\u1ea1i r\u1eebng \u0111\u1ea1t 70% tr\u1eef l\u01b0\u1ee3ng ban \u0111\u1ea7u ( 460m3<\/sup>\/ha\/ 330m3<\/sup>\/ha v\u00e0 573m3<\/sup>\/ha\/ 358m3<\/sup>\/ ha).<\/p>\n

– S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng gi\u1eefa hai c\u00f4ng th\u1ee9c kh\u00f4ng r\u00f5 r\u1ec7t nh\u01b0ng khai th\u00e1c 30% sau 20 n\u0103m r\u1eebng \u0111\u00e3 \u0111\u1ea1t tr\u1eef l\u01b0\u1ee3ng ban \u0111\u1ea7u, c\u01b0\u1eddng \u0111\u1ed9 khai th\u00e1c 50% m\u1edbi \u0111\u1ea1t 70% s\u1ea3n l\u01b0\u1ee3ng ban \u0111\u1ea7u, d\u1ef1 ki\u1ebfn 10 n\u0103m n\u1eefa s\u1ebd \u0111\u1ea1t 500m3<\/sup>\/ ha.<\/p>\n

+ Kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ef1 nhi\u00ean v\u00e0 t\u1ed5 th\u00e0nh: \u1edfc\u1ea3 hai c\u00f4ng th\u1ee9c, s\u1ed1 c\u00e2y t\u00e1i sinh t\u0103ng g\u1ea5p 2 l\u1ea7n so v\u1edbi tr\u01b0\u1edbc khai th\u00e1c. H\u1ea7u h\u1ebft c\u00e1c lo\u00e0i g\u1ed7 l\u1edbn c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1ec1u c\u00f3 m\u1eb7t trong t\u1ed5 th\u00e0nh r\u1eebng. S\u1ed1 lo\u00e0i g\u1ed7 l\u1edbn c\u00f3 t\u0103ng nh\u01b0ng kh\u00f4ng \u0111\u00e1ng k\u1ec3; lo\u00e0i g\u1ed7 t\u1ea1p, g\u1ed7 nh\u1ecf tuy gi\u1ea3m nh\u01b0ng c\u00f2n nhi\u1ec1u, c\u1ea7n ph\u1ea3i ch\u1eb7t th\u1ea3i lo\u1ea1i th\u00eam.<\/p>\n

Nh\u00ecn chung c\u1ea3 hai c\u00f4ng th\u1ee9c khai th\u00e1c 30% v\u00e0 50% tr\u1eef l\u01b0\u1ee3ng \u0111\u1ec1u b\u1ea3o \u0111\u1ea3m cho l\u00e2m ph\u1ea7n t\u0103ng tr\u01b0\u1edfng b\u00ecnh th\u01b0\u1eddng. S\u1ed1 c\u00e2y ph\u00e2n b\u1ed1 theo c\u1ea5p k\u00ednh bi\u1ebfn \u0111\u1ed9ng m\u1ea1nh, r\u1eebng khai th\u00e1c 20 n\u0103m s\u1ed1 c\u00e2y t\u1eadp trung ch\u1ee7 y\u1ebfu c\u00f3 D t\u1eeb 12- 32cm, th\u1ebf h\u1ec7 r\u1eebng non \u0111ang sinh tr\u01b0\u1edfng m\u1ea1nh v\u00e0 \u0111\u01b0\u1ee3c b\u1ed5 sung nhi\u1ec1u c\u00e2y g\u1ed7 t\u1ed1t.<\/p>\n

1.2 M\u00f4 h\u00ecnh s\u1ea3n xu\u1ea5t th\u1ef1c nghi\u1ec7m l\u00e0m gi\u00e0u r\u1eebng ngh\u00e8o t\u1ea1i Trung t\u00e2m Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p Kon H\u00e0 N\u1eebng.<\/em><\/p>\n

\u0110a s\u1ed1 r\u1eebng ngh\u00e8o \u1edf T\u00e2y Nguy\u00ean c\u00f3 chi\u1ec1u cao t\u1eeb 15-20 m, tr\u1eef l\u01b0\u1ee3ng 60- 120m3<\/sup>\/ ha. S\u1ed1 l\u01b0\u1ee3ng c\u00e2y g\u1ed7 l\u1edbn \u00edt, ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ec1u, m\u1eadt \u0111\u1ed9 t\u1eeb 150- 250 c\u00e2y\/ ha, trong \u0111\u00f3 c\u00e2y g\u1ed7 t\u1ea1p, k\u00e9m gi\u00e1 tr\u1ecb chi\u1ebfm t\u1eeb 30- 50%, d\u00e2y leo, b\u1ee5i r\u1eadm ph\u00e1t tri\u1ec3n m\u1ea1nh, kh\u1ea3 n\u0103ng t\u0103ng tr\u01b0\u1edfng v\u00e0 t\u00e1i sinh b\u1ecb h\u1ea1n ch\u1ebf.<\/p>\n

T\u1eeb n\u0103m 1985 \u0111\u1ebfn n\u0103m 1990, Trung t\u00e2m TNLN Kon H\u00e0 N\u1eebng \u0111\u00e3 ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt l\u00e0m gi\u00e0u r\u1eebng b\u1eb1ng c\u00e1c lo\u00e0i c\u00e2y nh\u01b0 gi\u1ed5i, tr\u00e1m, xoan m\u1ed9c, d\u1ea7u r\u00e1i, sao \u0111en, long n\u00e3o, g\u1ed9i n\u1ebfp,\u2026 tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng th\u1ee9 sinh ngh\u00e8o sau khai th\u00e1c ki\u1ec7t, tr\u1eef l\u01b0\u1ee3ng t\u1eeb 80- 120m3<\/sup>\/ ha, d\u00e2y leo c\u00e2y b\u1ee5i r\u1ea5t r\u1eadm r\u1ea1p.<\/p>\n

* Ph\u01b0\u01a1ng th\u1ee9c tr\u1ed3ng theo b\u0103ng<\/p>\n

– Gi\u1ed5i tr\u1ed3ng theo b\u0103ng m\u1edf 5m, ch\u1eeba 10 m, m\u1eadt \u0111\u1ed9 tr\u1ed3ng 300 c\u00e2y\/ ha.<\/p>\n

– Sao d\u1ea7u tr\u1ed3ng theo b\u0103ng m\u1edf 10m, ch\u1eeba 10m, m\u1eadt \u0111\u1ed9 tr\u1ed3ng 450 c\u00e2y\/ ha.<\/p>\n

C\u00e2y tr\u1ed3ng sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i nhanh, t\u00e1n c\u00e2n \u0111\u1ed1i (bi\u1ec3u 2).<\/p>\n

Bi\u1ec3u 2. L\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng D v\u00e0 H h\u00e0ng n\u0103m c\u1ee7a c\u00e1c c\u00e2y tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng<\/em><\/p>\n

\u0110o n\u0103m 2000<\/em><\/p>\n\n\n\n\n\n\n
Lo\u00e0i c\u00e2y<\/td>\nN\u0103m tr\u1ed3ng<\/td>\nL\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng c\u00e2y tr\u1ed3ng<\/td>\nT\u1ea7ng r\u1eebng t\u1ef1 nhi\u00ean<\/td>\n<\/tr>\n
D<\/td>\nH<\/td>\nm3<\/sup>\/ha<\/td>\nT\u0103ng tr\u01b0\u1edfng<\/td>\nN\/ ha<\/td>\nM\/ ha<\/td>\nT\u00e1i sinh<\/td>\n<\/tr>\n
D(cm\/n\u0103m)<\/td>\nH(m\/<\/p>\n

n\u0103m)<\/td>\n

T\u1ed5ng s\u1ed1<\/td>\n% c\u00e2y m\u1ee5c \u0111\u00edch<\/td>\n<\/tr>\n
Gi\u1ed5i<\/p>\n

D\u1ea7u r\u00e1i<\/p>\n

Sao \u0111en<\/td>\n

1985<\/p>\n

1991<\/p>\n

1991<\/td>\n

13,5<\/p>\n

10<\/p>\n

8<\/td>\n

15<\/p>\n

10<\/p>\n

7<\/td>\n

65<\/p>\n

40<\/p>\n

–<\/td>\n

0,95<\/p>\n

1,1<\/p>\n

0,8<\/td>\n

1,00<\/p>\n

1,1<\/p>\n

0,7<\/td>\n

80<\/p>\n

220<\/p>\n

240<\/td>\n

108<\/p>\n

120<\/p>\n

127<\/td>\n

2580<\/p>\n

3700<\/p>\n

350<\/td>\n

30<\/p>\n

40<\/p>\n

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

* Nh\u1eadn x\u00e9t: C\u00e2y gi\u1ed5i, d\u1ea7u r\u00e1i, sao \u0111en l\u00e0 nh\u1eefng lo\u00e0i c\u00e2y tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean t\u1ea1i v\u00f9ng Kon H\u00e0 N\u1eebng. C\u00e2y tr\u1ed3ng sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i nhanh, t\u00e1n ph\u00e1t tri\u1ec3n c\u00e2n \u0111\u1ed1i. C\u00e2y gi\u1ed5i v\u00e0 c\u00e2y d\u1ea7u r\u00e1i t\u0103ng tr\u01b0\u1edfng nhanh h\u01a1n, c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng th\u00e0nh r\u1eebng t\u1ed1t.<\/p>\n

2. Ph\u00e2n lo\u1ea1i hi\u1ec7n tr\u1ea1ng r\u1eebng nu\u00f4i d\u01b0\u1ee1ng<\/em><\/p>\n

\u0110\u1ed1i v\u1edbi r\u1eebng t\u1ef1 nhi\u00ean c\u00e2y l\u00e1 r\u1ed9ng c\u00f3 t\u1ed5 th\u00e0nh, c\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p v\u00e0 \u0111a d\u1ea1ng, tr\u1eef l\u01b0\u1ee3ng, ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng ph\u1ee5 thu\u1ed9c nhi\u1ec1u v\u00e0o nh\u00f3m lo\u00e0i c\u00e2y kinh t\u1ebf. Nhi\u1ec7m v\u1ee5 c\u1ee7a k\u1ef9 thu\u1eadt nu\u00f4i d\u01b0\u1ee1ng r\u1eebng l\u00e0 ch\u1ecdn \u0111\u01b0\u1ee3c nh\u00f3m lo\u00e0i c\u00e2y kinh t\u1ebf th\u00edch h\u1ee3p, nu\u00f4i d\u01b0\u1ee1ng r\u1eebng \u0111\u1ea1t \u0111\u1ebfn m\u1ee5c \u0111\u00edch kinh doanh. Ch\u00fang t\u00f4i cho r\u1eb1ng c\u1ea7n k\u1ebft h\u1ee3p h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i hi\u1ec7n \u0111ang s\u1eed d\u1ee5ng (ph\u00e2n theo tr\u1eef l\u01b0\u1ee3ng v\u00e0 lo\u00e0i I, II, III, IV c\u1ee7a Lochaud) v\u1edbi nh\u00f3m lo\u00e0i c\u00e2y kinh doanh v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1 c\u1ea5u tr\u00fac N\/ D, ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y kinh t\u1ebf t\u1eeb \u0111\u00f3 \u0111\u01b0a ra m\u1ed9t gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt h\u1ee3p l\u00fd, nh\u1eb1m \u0111\u01b0a r\u1eebng nhanh \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau kinh doanh l\u00e2u d\u00e0i v\u00e0 b\u1ec1n v\u1eefng.<\/p>\n

K\u1ebft h\u1ee3p t\u00e0i li\u1ec7u v\u1edbi thu th\u1eadp s\u1ed1 li\u1ec7u th\u1ef1c t\u1ebf, r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng v\u00f9ng B\u1eafc T\u00e2y Nguy\u00ean \u0111\u01b0\u1ee3c ph\u00e2n chia th\u00e0nh 11 tr\u1ea1ng th\u00e1i v\u00e0 m\u1ed7i d\u1ea1ng c\u00f3 m\u1ed9t gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt th\u00edch \u1ee9ng.<\/p>\n

3. M\u00f4 h\u00ecnh th\u00ed nghi\u1ec7m nu\u00f4i d\u01b0\u1ee1ng r\u1eebng tr\u00ean th\u1ef1c \u0111\u1ecba<\/em><\/p>\n

3.1 M\u00f4 h\u00ecnh 1<\/em><\/p>\n

– \u0110\u1eb7c \u0111i\u1ec3m t\u1ef1 nhi\u00ean: R\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh ph\u1ee5c h\u1ed3i sau khai th\u00e1c ch\u1ecdn c\u00f3 tr\u1eef l\u01b0\u1ee3ng trung b\u00ecnh t\u1eeb 200- 250m3<\/sup>\/ ha, N: 300-400c\/ ha, t\u00e1i sinh 1000- 2000 c\u00e2y\/ ha. Trong r\u1eebng t\u1ed3n \u0111\u1ecdng nhi\u1ec1u c\u00e2y g\u1ed7 gi\u00e0 c\u1ed7i, m\u1ee5c r\u1ed7ng v\u00e0 c\u00e1c c\u00e2y g\u1ed7 t\u1ea1p, g\u1ed7 nh\u1ecf, d\u00e2y leo c\u00e2y b\u1ee5i ph\u00e1t tri\u1ec3n nhanh.<\/p>\n

– Nh\u00f3m c\u00e2y kinh t\u1ebf: Gi\u1ed5i, tr\u00e1m, v\u1ea1ng, re, kh\u00e1o, g\u1ed9i, ch\u00f2, s\u1eefa,\u2026<\/p>\n

– Nh\u00f3m c\u00e2y ph\u00f9 tr\u1ee3: Tr\u00e2m, ch\u00f4m ch\u00f4m, s\u1ebfn, tr\u01b0\u1eddng, r\u00e0ng m\u00edt, chay, dung.<\/p>\n

– Nh\u00f3m c\u00e2y th\u1ea3i lo\u1ea1i: M\u00e3i t\u00e1p, \u0111\u1ebbn ba l\u00e1, \u0111a, l\u00e8o heo, c\u00f2 ke, hoa kh\u1ebf, ng\u00e1t, ch\u00e2n chim\u2026 v\u00e0 c\u00e1c c\u00e2y c\u00f3 ph\u1ea9m ch\u1ea5t x\u1ea5u.<\/p>\n

M\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean hi\u1ec7n tr\u1ea1ng r\u1eebng t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng nh\u1ea5t v\u1edbi hai c\u00f4ng th\u1ee9c kh\u00e1c nhau v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 ken ch\u1eb7t c\u00e2y th\u1ea3i lo\u1ea1i. C\u00f4ng th\u1ee9c 1 ken ch\u1eb7t 40% c\u00e2y th\u1ea3i lo\u1ea1i, c\u00f4ng th\u1ee9c 2 ken ch\u1eb7t 70% c\u00e2y th\u1ea3i lo\u1ea1i. M\u1ed7i c\u00f4ng th\u1ee9c 1 ha, l\u1eb7p l\u1ea1i 2 l\u1ea7n.<\/p>\n

– K\u1ef9 thu\u1eadt t\u00e1c \u0111\u1ed9ng: Lu\u1ed7ng d\u00e2y leo, b\u1ee5i r\u1eadm to\u00e0n di\u1ec7n, ken ch\u1eb7t, b\u00e0i ch\u1eb7t c\u00e2y theo c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a t\u1eebng c\u00f4ng th\u1ee9c.<\/p>\n

– K\u1ebft qu\u1ea3: (bi\u1ec3u 3)<\/p>\n

Bi\u1ec3u 3. C\u00e1c ch\u1ec9 ti\u00eau ch\u1ee7 y\u1ebfu v\u00e0 l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng h\u00e0ng n\u0103m c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c<\/em><\/p>\n\n\n\n\n\n\n\n
C\u00f4ng th\u1ee9c<\/td>\n\u00d4<\/p>\n

ti\u00eau chu\u1ea9n<\/td>\n

Tr. T\u00e1c \u0111\u1ed9ng<\/td>\nSau t\u00e1c \u0111\u1ed9ng<\/td>\n\u0110o l\u1ea7n 2(2000)<\/td>\nT\u0103ng h\u00e0ng n\u0103m<\/td>\n<\/tr>\n
N\u0103m<\/td>\nN<\/p>\n

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

M<\/p>\n

(m3<\/sup>)<\/td>\n

N<\/p>\n

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

M<\/p>\n

(m3<\/sup>)<\/td>\n

N (c\u00e2y)<\/td>\nM<\/p>\n

(m3<\/sup>)<\/td>\n

N (c\u00e2y)<\/td>\nM<\/p>\n

(m3<\/sup>)<\/td>\n<\/tr>\n

I: ch\u1eb7t 70% c\u00e2y x\u1ea5u<\/td>\n97<\/p>\n

97<\/p>\n

98<\/p>\n

98<\/td>\n

1<\/p>\n

3<\/p>\n

6<\/p>\n

9<\/td>\n

402<\/p>\n

568<\/p>\n

299<\/p>\n

403<\/td>\n

248<\/p>\n

330<\/p>\n

206<\/p>\n

256<\/td>\n

320<\/p>\n

446<\/p>\n

260<\/p>\n

343<\/td>\n

205<\/p>\n

266<\/p>\n

156<\/p>\n

206<\/td>\n

320<\/p>\n

448<\/p>\n

260<\/p>\n

353<\/td>\n

226<\/p>\n

285<\/p>\n

171<\/p>\n

223<\/td>\n

–<\/p>\n

2<\/p>\n

–<\/p>\n

5<\/td>\n

7,13<\/p>\n

6,25<\/p>\n

7,46<\/p>\n

8,36<\/td>\n<\/tr>\n

II: ch\u1eb7t 40% c\u00e2y x\u1ea5u<\/td>\n97<\/p>\n

97<\/p>\n

98<\/p>\n

98<\/td>\n

2<\/p>\n

4<\/p>\n

7<\/p>\n

10<\/td>\n

462<\/p>\n

555<\/p>\n

326<\/p>\n

360<\/td>\n

258<\/p>\n

290<\/p>\n

205<\/p>\n

291<\/td>\n

390<\/p>\n

475<\/p>\n

288<\/p>\n

330<\/td>\n

223<\/p>\n

242<\/p>\n

196<\/p>\n

285<\/td>\n

393<\/p>\n

467<\/p>\n

286<\/p>\n

333<\/td>\n

242<\/p>\n

267<\/p>\n

216<\/p>\n

299<\/td>\n

3<\/p>\n

–<\/p>\n

–<\/p>\n

3<\/td>\n

6,36<\/p>\n

8,19<\/p>\n

8,36<\/p>\n

7,31<\/td>\n<\/tr>\n

\u0110\u1ed1i ch\u1ee9ng<\/td>\n97<\/p>\n

98<\/td>\n

5<\/p>\n

8<\/td>\n

503<\/p>\n

325<\/td>\n

259<\/p>\n

246<\/td>\n

–<\/p>\n

–<\/td>\n

–<\/p>\n

–<\/td>\n

503<\/p>\n

322<\/td>\n

284<\/p>\n

269<\/td>\n

–<\/p>\n

–<\/td>\n

8,26<\/p>\n

6,58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

* Vi\u1ec7c ken ch\u1eb7t 40% v\u00e0 70% s\u1ed1 c\u00e2y kh\u00f4ng kinh t\u1ebf l\u00e0 h\u1ee3p l\u00fd. L\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng h\u00e0ng n\u0103m gi\u1eefa hai c\u00f4ng th\u1ee9c v\u00e0 \u0111\u1ed1i ch\u1ee9ng kh\u00f4ng kh\u00e1c l\u1ec7ch v\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m n\u0103ng su\u1ea5t c\u1ee7a r\u1eebng; b\u01b0\u1edbc \u0111\u1ea7u \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c t\u1ed5 th\u00e0nh v\u00e0 m\u1eadt \u0111\u1ed9, m\u1edf \u00e1nh s\u00e1ng cho c\u00e2y t\u00e1i sinh ph\u00e1t tri\u1ec3n m\u1ea1nh.<\/p>\n

* L\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng:<\/p>\n

– C\u00f4ng th\u1ee9c I: 7,30m3<\/sup>\/ ha\/ n\u0103m.<\/p>\n

– C\u00f4ng th\u1ee9c II: 7,56m3<\/sup>\/ ha\/ n\u0103m.<\/p>\n

– \u0110\u1ed1i ch\u1ee9ng: 7,46m3<\/sup>\/ ha\/ n\u0103m.<\/p>\n

– T\u00e1i sinh: + C\u00f4ng th\u1ee9c I t\u0103ng t\u1eeb 3800 c\u00e2y\/ ha l\u00ean 6000 c\u00e2y\/ ha.<\/p>\n

+ C\u00f4ng th\u1ee9c II t\u0103ng t\u1eeb 4100 c\u00e2y\/ ha l\u00ean 5600 c\u00e2y\/ ha.<\/p>\n

+ \u0110\u1ed1i ch\u1ee9ng t\u0103ng t\u1eeb 4000 c\u00e2y\/ ha l\u00ean 4200 c\u00e2y\/ ha.<\/p>\n

3.2 M\u00f4 h\u00ecnh<\/em>2<\/p>\n

– \u0110\u1eb7c \u0111i\u1ec3m t\u1ef1 nhi\u00ean: Hi\u1ec7n tr\u1ea1ng r\u1eebng ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby, tr\u1eef l\u01b0\u1ee3ng b\u00ecnh qu\u00e2n 40- 60m3<\/sup>\/ ha, s\u1ed1 c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh >= 10cm t\u1eeb 150- 200 c\u00e2y\/ ha, t\u00e1i sinh tr\u00ean 500 c\u00e2y\/ ha, ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1c lo\u00e0i c\u00e2y ti\u00ean phong nh\u01b0 hu\u0111ay, gi\u1ebb, tr\u00e2m, b\u1eddi l\u1eddi, s\u00f2i, c\u00f4m, m\u00e0ng tang v\u00e0 m\u1ed9t s\u1ed1 \u00edt c\u00e2y g\u1ed7 l\u1edbn nh\u01b0 g\u1ed9i, kh\u00e1o, re, c\u00e0 ch\u00edt. \u0110\u1ea5t x\u00e1m v\u00e0ng ph\u00e1t tri\u1ec3n tr\u00ean \u0111\u00e1 granis.<\/p>\n

– M\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean c\u00f9ng m\u1ed9t tr\u1ea1ng th\u00e1i r\u1eebng t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ed3ng nh\u1ea5t, tr\u1ed3ng 3 lo\u00e0i c\u00e2y kh\u00e1c nhau.<\/p>\n

+ C\u00f4ng th\u1ee9c1: Tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng b\u1eb1ng c\u00e2y gi\u1ed5i nhung.<\/p>\n

+ C\u00f4ng th\u1ee9c 2: Tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng b\u1eb1ng c\u00e2y sao \u0111en.<\/p>\n

+ C\u00f4ng th\u1ee9c 3: Tr\u1ed3ng l\u00e0m gi\u00e0u r\u1eebng b\u1eb1ng c\u00e2y d\u1ea7u r\u00e1i.<\/p>\n

M\u1ed7i c\u00f4ng th\u1ee9c 1 ha, b\u0103ng m\u1edf 7m, ch\u1eeba 8m, m\u1eadt \u0111\u1ed9 tr\u1ed3ng 300 c\u00e2y\/ ha.<\/p>\n

– K\u1ebft qu\u1ea3: (Bi\u1ec3u 4)<\/p>\n

Bi\u1ec3u 4. C\u00e1c ch\u1ec9 ti\u00eau ch\u1ee7 y\u1ebfu v\u00e0 l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng c\u00e2y tr\u1ed3ng<\/em><\/p>\n\n\n\n\n\n\n
C\u00f4ng th\u1ee9c<\/td>\nLo\u00e0i c\u00e2y tr\u1ed3ng<\/td>\nR\u1eebng t\u1ef1 nhi\u00ean<\/td>\nC\u00e2y tr\u1ed3ng l\u00e0m gi\u00e0u<\/td>\n<\/tr>\n
N\/ ha<\/td>\nM\/ ha<\/td>\nT\u0103ng tr\u01b0\u1edfng<\/td>\nT\u00e1i sinh<\/td>\nL\u00fac tr\u1ed3ng<\/td>\n\u0110o l\u1ea7n 2<\/td>\nT\u0103ng h\u00e0ng n\u0103m<\/td>\n<\/tr>\n
T\u1ed5ng s\u1ed1<\/td>\n% Kt\u1ebf<\/td>\nD<\/p>\n

(cm)<\/td>\n

H<\/p>\n

(cm)<\/td>\n

D<\/p>\n

(cm)<\/td>\n

H<\/p>\n

(cm)<\/td>\n

D<\/p>\n

(cm)<\/td>\n

H<\/p>\n

(cm)<\/td>\n<\/tr>\n

1<\/p>\n

2<\/p>\n

3<\/td>\n

Gi\u1ed5i<\/p>\n

S. \u0111en<\/p>\n

D. r\u00e1i<\/td>\n

171<\/p>\n

204<\/p>\n

190<\/td>\n

64<\/p>\n

43<\/p>\n

58<\/td>\n

2,0<\/p>\n

1,6<\/p>\n

2,05<\/td>\n

700<\/p>\n

450<\/p>\n

700<\/td>\n

200<\/p>\n

150<\/p>\n

250<\/td>\n

0,2<\/p>\n

0,2<\/p>\n

0,2<\/td>\n

0,4<\/p>\n

0,2<\/p>\n

0,3<\/td>\n

0,3<\/p>\n

0,5<\/p>\n

0,5<\/td>\n

0,8<\/p>\n

0,7<\/p>\n

0,9<\/td>\n

0,2<\/p>\n

0,25<\/p>\n

0,3<\/td>\n

0,4<\/p>\n

0,5<\/p>\n

0,6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nh\u1eadn x\u00e9t: C\u1ea3 3 lo\u00e0i c\u00e2y tr\u1ed3ng \u0111\u1ec1u sinh tr\u01b0\u1edfng t\u1ed1t, th\u00e2n th\u1eb3ng \u0111\u1eb9p, t\u00e1n c\u00e2n \u0111\u1ed1i, kh\u00f4ng s\u00e2u b\u1ec7nh h\u1ea1i. L\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i nhanh, D t\u1eeb 0,30- 0,40cm\/ n\u0103m, H t\u1eeb 0,70- 0,80m\/ n\u0103m.<\/p>\n

Trong 3 c\u00f4ng th\u1ee9c tr\u00ean, c\u00e2y d\u1ea7u r\u00e1i v\u00e0 c\u00e2y sao \u0111en t\u1ecf ra c\u00f3 tri\u1ec3n v\u1ecdng h\u01a1n c\u00e2y gi\u1ed5i tr\u00ean tr\u1ea1ng th\u00e1i r\u1eebng ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby, \u0111\u1ea5t b\u1ea1c m\u00e0u kh\u00f4 h\u1ea1n.<\/p>\n

III. Th\u1ea3o lu\u1eadn v\u00e0 k\u1ebft lu\u1eadn<\/p>\n

Nghi\u00ean c\u1ee9u v\u1ec1 r\u1eebng t\u1ef1 nhi\u00ean l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 ph\u1ee5c h\u1ed3i v\u00e0 nu\u00f4i d\u01b0\u1ee1ng ch\u00fang, nh\u1ea5t l\u00e0 \u0111\u1ed1i v\u1edbi v\u00f9ng B\u1eafc T\u00e2y Nguy\u00ean.<\/p>\n

– R\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng v\u00f9ng B\u1eafc T\u00e2y Nguy\u00ean r\u1ea5t phong ph\u00fa v\u00e0 \u0111a d\u1ea1ng, c\u00f3 t\u1ed5 th\u00e0nh c\u1ea5u tr\u00fac r\u1ea5t ph\u1ee9c t\u1ea1p, c\u1ea7n \u0111i s\u00e2u nghi\u00ean c\u1ee9u \u0111\u1ea7y \u0111\u1ee7 to\u00e0n di\u1ec7n h\u01a1n n\u1eefa. Trong ph\u1ea1m vi nghi\u00ean c\u1ee9u ch\u1ec9 ra r\u1eb1ng:<\/p>\n

+ Tr\u1ea1ng th\u00e1i r\u1eebng gi\u00e0u v\u00e0 trung b\u00ecnh \u0111\u01b0a v\u00e0o khai th\u00e1c s\u1eed d\u1ee5ng v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 ch\u1eb7t t\u1eeb 30- 50% k\u1ebft h\u1ee3p v\u1edbi c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tu b\u1ed5, nu\u00f4i d\u01b0\u1ee1ng h\u1ee3p l\u00fd s\u1ebd \u0111\u1ea3m b\u1ea3o cho r\u1eebng ph\u1ee5c h\u1ed3i t\u1ed1t c\u1ea3 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 tr\u1eef l\u01b0\u1ee3ng.<\/p>\n

+ Nu\u00f4i d\u01b0\u1ee1ng r\u1eebng sau khai th\u00e1c v\u1edbi bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt lu\u1ed7ng d\u00e2y leo, b\u1ee5i r\u1eadm, ken ch\u1eb7t t\u1eeb 40- 70% c\u00e2y th\u1ea3i lo\u1ea1i kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn n\u0103ng su\u1ea5t c\u1ee7a r\u1eebng, \u0111\u1ed3ng th\u1eddi m\u1edf \u00e1nh s\u00e1ng cho c\u00e2y nu\u00f4i d\u01b0\u1ee1ng v\u00e0 t\u00e1i sinh ph\u00e1t tri\u1ec3n m\u1ea1nh, t\u0103ng n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y g\u1ed7 kinh t\u1ebf n\u00f3i ri\u00eang c\u0169ng nh\u01b0 l\u00e2m ph\u1ea7n n\u00f3i chung.<\/p>\n

+ L\u00e0m gi\u00e0u r\u1eebng b\u1eb1ng c\u00e2y b\u1ea3n \u0111\u1ecba v\u1edbi c\u00e1c lo\u00e0i gi\u1ed5i, sao \u0111en, d\u1ea7u r\u00e1i t\u1ecf ra c\u00f3 nhi\u1ec1u tri\u1ec3n v\u1ecdng. C\u00e2y tr\u1ed3ng sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i nhanh, th\u00e2n th\u1eb3ng, t\u00e1n c\u00e2n \u0111\u1ed1i, ch\u01b0a th\u1ea5y b\u1ecb s\u00e2u b\u1ec7nh h\u1ea1i. \u0110\u1ed1i v\u1edbi tr\u1ea1ng th\u00e1i r\u1eebng khai th\u00e1c ki\u1ec7t, \u0111\u1ea5t \u0111ai t\u1ed1t c\u00e2y gi\u1ed5i sinh tr\u01b0\u1edfng nhanh h\u01a1n, nh\u01b0ng tr\u1ea1ng th\u00e1i r\u1eebng ph\u1ee5c h\u1ed3i sau n\u01b0\u01a1ng r\u1eaby \u0111\u1ea5t tho\u00e1i ho\u00e1, b\u1ea1c m\u00e0u c\u00e2y d\u1ea7u r\u00e1i v\u00e0 sao \u0111en sinh tr\u01b0\u1edfng nhanh h\u01a1n.<\/p>\n

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

1 – Th\u00e1i V\u0103n Tr\u1eebng. Th\u1ea3m th\u1ef1c v\u1eadt r\u1eebng (Tr\u00ean quan \u0111i\u1ec3m sinh th\u00e1i).<\/p>\n

2 – Nguy\u1ec5n Ng\u1ecdc Lung, \u0110\u1ed7 \u0110\u00ecnh S\u00e2m. Nh\u1eefng c\u01a1 s\u1edf b\u01b0\u1edbc \u0111\u1ea7u x\u00e2y d\u1ef1ng quy ph\u1ea1m khai th\u00e1c g\u1ed7.<\/p>\n

3 – \u0110\u1ed7 \u0110\u00ecnh S\u00e2m, 1996. Nh\u1eefng c\u01a1 s\u1edf sinh th\u00e1i- th\u1ed5 nh\u01b0\u1ee1ng \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 ph\u00ec \u0111\u1ea5t r\u1eebng Vi\u1ec7t Nam.<\/p>\n

4 – Nguy\u1ec5n Xu\u00e2n Qu\u00e1t, V\u0169 V\u0103n M\u1ec5, \u0110o\u00e0n B\u1ed5ng. B\u01b0\u1edbc \u0111\u1ea7u x\u00e2y d\u1ef1ng c\u00e2y tr\u1ed3ng r\u1eebng cho c\u00e1c v\u00f9ng kinh t\u1ebf l\u00e2m nghi\u1ec7p (1983-1995).<\/p>\n

5 – V\u0169 Bi\u1ec7t Linh, B\u00f9i \u0110o\u00e0n. Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 c\u01a1 s\u1edf khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 cho th\u00e2m canh r\u1eebng g\u1ed7 l\u1edbn tr\u00ean di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh.<\/p>\n

6 – Tr\u1ea7n \u0110\u00ecnh L\u00fd. Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh di\u1ec7n t\u00edch v\u00e0 h\u1ec7 th\u1ed1ng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt cho vi\u1ec7c khoanh nu\u00f4i ph\u1ee5c h\u1ed3i r\u1eebng.<\/p>\n

7 – Ph\u1ea1m \u0110\u00ecnh Tam. Kh\u1ea3 n\u0103ng t\u00e1i sinh ph\u1ee5c h\u1ed3i r\u1eebng sau khai th\u00e1c t\u1ea1i v\u00f9ng Kon H\u00e0 N\u1eebng.<\/p>\n

8 – B\u00f9i \u0110o\u00e0n. Nh\u00f3m sinh th\u00e1i l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh v\u00f9ng Kon H\u00e0 N\u1eebng.<\/p>\n

Research on techniques for natural broadleaved forest rehabilitation and maintenance in Northen Central Highland.<\/p>\n

Summary:<\/em>This paper deals with the research on technique to rehabilitate and maintain natural, broad-leaved forests in northern Central Highland and makes some suggestions:<\/p>\n

+ Rich and average forests exploited at intensity of 30 \u2014 50% in combination with rational tending and maintaining measures can ensure good forest rehabilitation.<\/p>\n

+ Maintaining logged- over forest with techniques such as cutting and clearing climbers, bushes; girdling 40 \u2014 70% of the undesired trees, causes no bad effect on forest productivity.<\/p>\n

+ Forest enrich planting with native species such as Talauma gioi, Hopea odorata, Canarium oleosum proves promising.<\/p>\n

**********************************************<\/p>\n","protected":false},"excerpt":{"rendered":"

R\u1eebng t\u1ef1 nhiên \u0111óng vai trò r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi \u0111\u1eddi s\u1ed1ng con ng\u01b0\u1eddi. Ngoài vi\u1ec7c cung c\u1ea5p g\u1ed7, c\u1ee7i và lâm \u0111\u1eb7c s\u1ea3n khác, chúng còn gi\u1eef vai trò phòng h\u1ed9, ch\u1ed1ng xói mòn, r\u1eeda trôi, \u0111i\u1ec1u hoà khí h\u1eadu và b\u1ea3o v\u1ec7 môi tr\u01b0\u1eddng… R\u1eebng t\u1ef1 nhiên \u0111ã và \u0111ang b\u1ecb tàn phá n\u1eb7ng n\u1ec1, nh\u1ea5t là t\u1eeb 1975 tr\u1edf l\u1ea1i \u0111ây. Theo s\u1ed1 li\u1ec7u th\u1ed1ng kê 1999, r\u1eebng t\u1ef1 nhiên n\u01b0\u1edbc ta có kho\u1ea3ng 9,44 tri\u1ec7u ha v\u1edbi tr\u1eef l\u01b0\u1ee3ng kho\u1ea3ng 720 tri\u1ec7u m3, chi\u1ebfm 96% tr\u1eef l\u01b0\u1ee3ng g\u1ed7 c\u1ea3 n\u01b0\u1edbc. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8557"}],"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=8557"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8557\/revisions"}],"predecessor-version":[{"id":19341,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8557\/revisions\/19341"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}