{"id":9503,"date":"2011-02-15T03:20:49","date_gmt":"2011-02-14T20:20:49","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2011\/02\/nghien-cuu-chon-cac-dong-keo-va-bach-dan-chong-chiu-benh-co-nang-suat-cao\/"},"modified":"2013-10-06T09:02:09","modified_gmt":"2013-10-06T02:02:09","slug":"nghien-cuu-chon-cac-dong-keo-va-bach-dan-chong-chiu-benh-co-nang-suat-cao","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-chon-cac-dong-keo-va-bach-dan-chong-chiu-benh-co-nang-suat-cao\/","title":{"rendered":"Nghi\u00ean c\u1ee9u ch\u1ecdn c\u00e1c d\u00f2ng keo v\u00e0 b\u1ea1ch \u0111\u00e0n ch\u1ed1ng ch\u1ecbu b\u1ec7nh c\u00f3 n\u0103ng su\u1ea5t cao"},"content":{"rendered":"

Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a, Ph\u1ea1m Quang Thu, Nguy\u1ec5n V\u0103n Chi\u1ebfn<\/strong> <\/p>\n

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

T\u00d3M T\u1eaeT<\/strong> <\/p>\n

C\u00e1c c\u00e2y tr\u1ed9i c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t v\u00e0 kh\u00f4ng b\u1ecb b\u1ec7nh trong c\u00e1c r\u1eebng tr\u1ed3ng b\u1ecb b\u1ec7nh \u0111\u00e3 \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn v\u00e0 nh\u00e2n hom v\u00e0 \u0111\u01b0a v\u00e0o c\u00e1c kh\u1ea3o nghi\u1ec7m d\u00f2ng v\u00f4 t\u00ednh \u0111\u1ec3 ch\u1ecdn ra c\u00e1c d\u00f2ng kh\u00e1ng b\u1ec7nh t\u1ed1t nh\u1ea5t \u0111\u01b0a v\u00e0o tr\u1ed3ng r\u1eebng. <\/p>\n

Kh\u1ea3o nghi\u1ec7m \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u00e0o n\u0103m 1998 v\u1edbi 49 d\u00f2ng v\u00f4 t\u00ednh c\u1ee7a 3 lo\u00e0i B\u1ea1ch \u0111\u00e0n (E. brassiana, E. camaldulensis<\/em> v\u00e0 E. tereticornis<\/em>) c\u00f9ng \u0111\u1ed1i ch\u1ee9ng l\u00e0 h\u1ea1t gi\u1ed1ng E. brassiana<\/em>. V\u1edbi m\u1eadt \u0111\u1ed9 cu\u1ed1i c\u00f9ng c\u1ee7a r\u1eebng l\u00e0 1000 c\u00e2y\/ha (m\u1eadt \u0111\u1ed9 ban \u0111\u1ea7u l\u00e0 1650 c\u00e2y\/ha) th\u00ec t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n sau 6,2 n\u0103m c\u1ee7a d\u00f2ng SM16 l\u00e0 40 m3<\/sup>\/ha\/n\u0103m v\u00e0 d\u00f2ng SM23 \u0111\u1ea1t 35,2 m3<\/sup>\/ha\/n\u0103m. N\u0103m 2005, B\u1ed9 N\u00f4ng nghi\u1ec7p &PTNT \u0111\u00e3 c\u00f4ng nh\u1eadn hai d\u00f2ng SM16 v\u00e0 SM23 l\u00e0 gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt cho v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. Kh\u1ea3o nghi\u1ec7m v\u1edbi 70 d\u00f2ng (64 th\u00e1ng tu\u1ed5i) c\u00f3 3 d\u00f2ng EF24, EF39 v\u00e0 EF55 c\u00f3 m\u1ee9c \u0111\u1ed9 b\u1ecb b\u1ec7nh v\u1edbi ch\u1ec9 s\u1ed1 b\u1ec7nh r\u1ea5t th\u1ea5p, nh\u1ecf h\u01a1n 0,5, h\u00ecnh th\u00e2n \u0111\u1eb9p, t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n \u0111\u1ea1t tr\u00ean 27 m3<\/sup>\/ha\/n\u0103m. Tr\u00ean c\u01a1 s\u1edf h\u00e0ng ch\u1ee5c kh\u1ea3o nghi\u1ec7m b\u1ea1ch \u0111\u00e0n \u0111\u00e3 \u0111\u01b0\u1ee3c tri\u1ec3n khai th\u1ef1c hi\u1ec7n tr\u00ean kh\u1eafp c\u1ea3 n\u01b0\u1edbc, n\u0103m 2007, B\u1ed9 N\u00f4ng nghi\u1ec7p &PTNT \u0111\u00e3 c\u00f4ng nh\u1eadn b\u1ed1n d\u00f2ng v\u00f4 t\u00ednh b\u1ea1ch \u0111\u00e0n l\u00e0 SM7, EF24, EF39 v\u00e0 EF55 l\u00e0 gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt sinh tr\u01b0\u1edfng nhanh v\u00e0 kh\u00e1ng b\u1ec7nh cho v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. <\/p>\n

Kh\u1ea3o nghi\u1ec7m g\u1ed3m 24 d\u00f2ng Keo lai \u0111\u01b0\u1ee3c tr\u1ed3ng n\u0103m 2002, t\u1ea1i B\u1ea7u B\u00e0ng, B\u00ecnh D\u01b0\u01a1ng trong \u0111\u00f3 c\u00f3 8 d\u00f2ng c\u1ee7a do \u0111\u1ec1 t\u00e0i m\u1edbi ch\u1ecdn, 14 d\u00f2ng \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn v\u00e0 2 d\u00f2ng \u0111\u1ed1i ch\u1ee9ng cho th\u1ea5y hai d\u00f2ng Keo lai l\u00e0 AH7 v\u00e0 AH1 c\u00f3 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng t\u1ed1t, \u0111\u1ea1t n\u0103ng su\u1ea5t trung b\u00ecnh 34,9m3<\/sup>\/ha\/n\u0103m v\u00e0 30,0m3<\/sup>\/ha\/n\u0103m v\u00e0 kh\u00f4ng b\u1ecb b\u1ec7nh ph\u1ea5n h\u1ed3ng. Sinh tr\u01b0\u1edfng c\u1ee7a hai d\u00f2ng Keo lai AH7 v\u00e0 AH1 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi d\u00f2ng BV10 v\u00e0 d\u00f2ng KL14. Kh\u1ea3o nghi\u1ec7m g\u1ed3m 26 d\u00f2ng keo lai \u0111\u01b0\u1ee3c tr\u1ed3ng n\u0103m 2002, t\u1ea1i S\u00f4ng M\u00e2y, \u0110\u1ed3ng Nai c\u0169ng cho th\u1ea5y hai d\u00f2ng Keo lai AH7 v\u00e0 AH1 c\u00f3 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng \u0111\u1ea1t n\u0103ng su\u1ea5t trung b\u00ecnh 24,4m3<\/sup>\/ha\/n\u0103m v\u00e0 23,0m3<\/sup>\/ha\/n\u0103m. N\u0103m 2007, B\u1ed9 N\u00f4ng nghi\u1ec7p &PTNT \u0111\u00e3 c\u00f4ng nh\u1eadn hai d\u00f2ng Keo lai l\u00e0 AH1 v\u00e0 AH7 l\u00e0 gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt cho v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. <\/p>\n

Kh\u1ea3o nghi\u1ec7m g\u1ed3m 9 d\u00f2ng Keo l\u00e1 tr\u00e0m \u0111\u01b0\u1ee3c tr\u1ed3ng n\u0103m 2001 t\u1ea1i S\u00f4ng M\u00e2y, \u0110\u1ed3ng Nai cho th\u1ea5y sinh tr\u01b0\u1edfng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c d\u00f2ng Keo l\u00e1 tr\u00e0m sau h\u01a1n 5 n\u0103m tu\u1ed5i \u0111\u1ec1u \u0111\u1ea1t \u1edf m\u1ee9c cao tr\u00ean 20m3<\/sup>\/ha\/n\u0103m v\u00e0 kh\u00f4ng b\u1ecb b\u1ec7nh ph\u1ea5n h\u1ed3ng, trong \u0111\u00f3 hai d\u00f2ng \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t l\u00e0 AA15 v\u00e0 AA9 c\u00f3 s\u1ee9c sinh tr\u01b0\u1edfng \u0111\u1ea1t 33,6m3<\/sup>\/ha\/n\u0103m v\u00e0 32,7m3<\/sup>\/ha\/n\u0103m. Kh\u1ea3o nghi\u1ec7m g\u1ed3m 13 d\u00f2ng Keo l\u00e1 tr\u00e0m tr\u00ean l\u1eadp \u0111\u1ecba ph\u00f9 sa c\u1ed5 \u1edf Minh \u0110\u1ee9c, B\u00ecnh Ph\u01b0\u1edbc, cho th\u1ea5y hai d\u00f2ng Keo l\u00e1 tr\u00e0m sinh tr\u01b0\u1edfng nhanh, th\u00e2n th\u1eb3ng, \u0111\u1eb9p, kh\u00f4ng b\u1ecb b\u1ec7nh l\u00e0 AA1 v\u00e0 AA9 \u0111\u1ea1t 25,7m3<\/sup>\/ha\/n\u0103m v\u00e0 25,3m3<\/sup>\/ha\/n\u0103m. N\u0103m 2007, B\u1ed9 N\u00f4ng nghi\u1ec7p &PTNT \u0111\u00e3 c\u00f4ng nh\u1eadn hai d\u00f2ng Keo lai l\u00e0 AA1, AA9 v\u00e0 AA15 l\u00e0 gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt cho v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. <\/p>\n

T\u1eeb kh\u00f3a<\/strong>: Keo, b\u1ea1ch \u0111\u00e0n, b\u1ec7nh <\/p>\n

I. M\u1ede \u0110\u1ea6U<\/strong> <\/p>\n

Gi\u1ed1ng l\u00e0 b\u01b0\u1edbc \u0111\u1ed9t ph\u00e1 trong vi\u1ec7c t\u0103ng n\u0103ng su\u1ea5t c\u00e2y tr\u1ed3ng, \u0111\u1eb7c bi\u1ec7t cho c\u00e2y l\u00e2m nghi\u1ec7p. Trong giai \u0111o\u1ea1n 1980-2000, \u0111\u00e3 c\u00f3 t\u1edbi 150 xu\u1ea5t x\u1ee9 c\u1ee7a 15 lo\u00e0i b\u1ea1ch \u0111\u00e0n \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m g\u00e2y tr\u1ed3ng \u1edf Vi\u1ec7t Nam. Trong v\u00f2ng 20 n\u0103m (1980- 2000) \u0111\u00e3 c\u00f3tr\u00ean 20 kh\u1ea3o nghi\u1ec7m \u0111\u01b0\u1ee3c tri\u1ec3n khai, tr\u1ea3i d\u00e0i su\u1ed1t t\u1eeb B\u1eafc t\u1edbi Nam, t\u1ea1i nhi\u1ec1u v\u00f9ng sinh th\u00e1i v\u00e0 tr\u00ean nhi\u1ec1u d\u1ea1ng l\u1eadp \u0111\u1ecba kh\u00e1c nhau \u0111\u00e3 l\u00e0 c\u01a1 s\u1edf t\u1ed1t \u0111\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c c\u00e1c lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 c\u00f3 tri\u1ec3n v\u1ecdng trong to\u00e0n qu\u1ed1c v\u00e0 cho t\u1eebng v\u00f9ng. H\u00e0ng ch\u1ee5c lo\u00e0i v\u00e0 g\u1ea7n 100 xu\u1ea5t x\u1ee9 Keo Acacia <\/em>v\u00f9ng th\u1ea5p \u0111\u00e3 \u0111\u01b0\u1ee3c quan t\u00e2m kh\u1ea3o nghi\u1ec7m t\u1eeb nh\u1eefng n\u0103m 1980. Trong s\u1ed1 nhi\u1ec1u lo\u00e0i keo \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o kh\u1ea3o nghi\u1ec7m th\u00ec 3 lo\u00e0i l\u00e0 Keo l\u00e1 li\u1ec1m, Keo l\u00e1 tr\u00e0m v\u00e0 Keo tai t\u01b0\u1ee3ng \u0111\u00e3 ch\u1ee9ng t\u1ecf c\u00f3 nhi\u1ec1u xu\u1ea5t x\u1ee9 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u tr\u1ed3ng r\u1eebng tr\u00ean di\u1ec7n r\u1ed9ng do c\u00f3 sinh tr\u01b0\u1edfng nhanh v\u00e0 kh\u1ea3 n\u0103ng th\u00edch nghi cao. G\u1ea7n \u0111\u00e2y Keo lai t\u1ef1 nhi\u00ean v\u00e0 nh\u00e2n t\u1ea1o c\u0169ng \u0111\u00e3 tr\u1edf th\u00e0nh c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 l\u1ef1c \u1edf nhi\u1ec1u v\u00f9ng. <\/p>\n

(K\u1ef7 y\u1ebfu H\u1ed9i ngh\u1ecb Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 L\u00e2m nghi\u1ec7p v\u1edbi ph\u00e1t tri\u1ec3n r\u1eebng b\u1ec1n v\u1eefng v\u00e0 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, trang 55-67)<\/em> <\/p>\n","protected":false},"excerpt":{"rendered":"

\nCác cây tr\u1ed9i có sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t và không b\u1ecb b\u1ec7nh trong các r\u1eebng tr\u1ed3ng b\u1ecb b\u1ec7nh \u0111ã \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn và nhân hom và \u0111\u01b0a vào các kh\u1ea3o nghi\u1ec7m dòng vô tính \u0111\u1ec3 ch\u1ecdn ra các dòng kháng b\u1ec7nh t\u1ed1t nh\u1ea5t \u0111\u01b0a vào tr\u1ed3ng r\u1eebng. Kh\u1ea3o nghi\u1ec7m \u0111\u1ea7u tiên \u0111\u01b0\u1ee3c xây d\u1ef1ng vào n\u0103m 1998 v\u1edbi 49 dòng vô tính c\u1ee7a 3 loài B\u1ea1ch \u0111àn (E. brassiana, E. camaldulensis<\/em> và E. tereticornis<\/em>) cùng \u0111\u1ed1i ch\u1ee9ng là h\u1ea1t gi\u1ed1ng E. brassiana<\/em>. V\u1edbi m\u1eadt \u0111\u1ed9 cu\u1ed1i cùng c\u1ee7a r\u1eebng là 1000 cây\/ha (m\u1eadt \u0111\u1ed9 ban \u0111\u1ea7u là 1650 cây\/ha) thì t\u0103ng tr\u01b0\u1edfng bình quân sau 6,2 n\u0103m c\u1ee7a dòng SM16 là 40 m3<\/sup>\/ha\/n\u0103m và dòng SM23 \u0111\u1ea1t 35,2 m3<\/sup>\/ha\/n\u0103m. N\u0103m 2005, B\u1ed9 Nông nghi\u1ec7p &PTNT \u0111ã công nh\u1eadn hai dòng SM16 và SM23 là gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt cho vùng \u0110ông Nam B\u1ed9. <\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9503"}],"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=9503"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9503\/revisions"}],"predecessor-version":[{"id":10957,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9503\/revisions\/10957"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}