{"id":8898,"date":"2007-01-14T22:33:48","date_gmt":"2007-01-14T15:33:48","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2007\/01\/tuyen-chon-cac-dong-bach-dan-chong-chiu-benh-co-nang-suat-cao\/"},"modified":"2013-10-06T09:00:47","modified_gmt":"2013-10-06T02:00:47","slug":"tuyen-chon-cac-dong-bach-dan-chong-chiu-benh-co-nang-suat-cao","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/tuyen-chon-cac-dong-bach-dan-chong-chiu-benh-co-nang-suat-cao\/","title":{"rendered":"Tuy\u1ec3n Ch\u1ecdn c\u00e1c d\u00f2ng 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<\/h2>\n

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

T\u00f3m t\u1eaft <\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 tuy\u1ec3n ch\u1ecdn \u0111\u01b0\u1ee3c 73 gia \u0111\u00ecnh lo\u00e0i b\u1ea1ch \u0111\u00e0n E.camaldulensis<\/i> c\u00f3 c\u1ea5p b\u1ec7nh t\u1eeb 1-4 v\u00e0 sinh tr\u01b0\u1edfng kh\u00e1 t\u1eeb 150 gia \u0111\u00ecnh b\u1ea1ch \u0111\u00e0n FORTIP; t\u1eeb r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t \u0111\u00e3 tuy\u1ec3n ch\u1ecdn \u0111\u01b0\u1ee3c 78 c\u00e2y tr\u1ed9i b\u1ea1ch \u0111\u00e0n E.camaldulensis<\/i> ch\u1ed1ng ch\u1ecbu b\u1ec7nh v\u00e0 sinh tr\u01b0\u1edfng nhanh. \u0110\u01b0a v\u00e0o kh\u1ea3o nghi\u1ec7m 136 d\u00f2ng b\u1ea1ch \u0111\u00e0n t\u1ea1i c\u00e1c v\u00f9ng c\u00f3 b\u1ec7nh nguy hi\u1ec3m t\u1eeb \u0111\u00f3 tuy\u1ec3n ch\u1ecdn \u0111\u01b0\u1ee3c c\u00e1c d\u00f2ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh. C\u00e1c d\u00f2ng b\u1ea1ch \u0111\u00e0n FORTIP c\u00f3 tri\u1ec3n v\u1ecdng l\u00e0 EF18, EF43, EF29, EF55, E7 v\u00e0 EF23 \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng nhanh, \u0111\u1ea1t t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n tr\u00ean 20m3<\/sup>\/ha\/n\u0103m v\u00e0 ch\u1ed1ng ch\u1ecbu t\u1ed1t v\u1edbi b\u1ec7nh h\u1ea1i l\u00e1 t\u1ea1i S\u00f4ng M\u00e2y (\u0110\u1ed3ng Nai) \u1edf giai \u0111o\u1ea1n 4 n\u0103m tu\u1ed5i. M\u1ed9t s\u1ed1 d\u00f2ng c\u00f3 tri\u1ec3n v\u1ecdng v\u1ec1 sinh tr\u01b0\u1edfng v\u00e0 ch\u1ed1ng ch\u1ecbu b\u1ec7nh \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn t\u1eeb r\u1eebng s\u1ea3n xu\u1ea5t l\u00e0 c\u00e1c d\u00f2ng EC57 (15m3<\/sup>\/ha\/n\u0103m), EC15, EC26, EC38 v\u00e0 EC63 \u1edf S\u00f4ng M\u00e2y; c\u00e1c d\u00f2ng EC25 (10m3<\/sup>\/ha\/n\u0103m), EC15, ET1, EC69 v\u00e0 EC66 \u1edf B\u00ecnh \u0110i\u1ec1n (Th\u1eeba Thi\u00ean Hu\u1ebf); c\u00e1c d\u00f2ng EC84, ET1, EC67, EC76 v\u00e0 ET2 \u1edf \u0110\u1ea1i L\u1ea3i (V\u0129nh Ph\u00fac) v\u00e0 d\u00f2ng EC81 \u0111\u1ea1t 29,3m3<\/sup>\/ha\/n\u0103m, d\u00f2ng EC10 \u0111\u1ea1t 21,9m3<\/sup>\/ha\/n\u0103m v\u00e0 d\u00f2ng EC82 \u0111\u1ea1t 20,3m3<\/sup>\/ha\/n\u0103m kh\u1ea3o nghi\u1ec7m sau 2 n\u0103m tu\u1ed5i \u1edf Minh \u0110\u1ee9c (B\u00ecnh Ph\u01b0\u1edbc). <\/p>\n<\/p>\n

T\u1eeb kho\u00e1<\/b>: Ch\u1ecdn gi\u1ed1ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh, d\u00f2ng v\u00f4 t\u00ednh, b\u1ea1ch \u0111\u00e0n. <\/p>\n<\/p>\n

M\u1edf \u0111\u1ea7u <\/p>\n

B\u1ea1ch \u0111\u00e0n (Eucalyptus<\/i> L\u2019Herit) l\u00e0 m\u1ed9t chi th\u1ef1c v\u1eadt thu\u1ed9c h\u1ecd Sim (Myrtaceae<\/i>) bao g\u1ed3m tr\u00ean 500 lo\u00e0i v\u00e0 \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh nhi\u1ec1u chi ph\u1ee5 kh\u00e1c nhau, ch\u1ee7 y\u1ebfu g\u1eb7p \u1edf \u00d4xtr\u00e2ylia. Trong nh\u1eefng n\u0103m v\u1eeba qua, di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n tr\u00ean th\u1ebf gi\u1edbi \u0111\u00e3 t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3. V\u1edbi nh\u1eefng c\u1ed1 g\u1eafng l\u1edbn lao v\u1ec1 ch\u1ecdn gi\u1ed1ng, s\u1eed d\u1ee5ng c\u00e1c d\u00f2ng v\u00f4 t\u00ednh cao s\u1ea3n v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p th\u00e2m canh m\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n \u0111\u00e3 t\u0103ng l\u00ean v\u01b0\u1ee3t b\u1eadc \u1edf nhi\u1ec1u n\u01b0\u1edbc tr\u00ean th\u1ebf gi\u1edbi \u0111\u1eb7c bi\u1ec7t l\u00e0 Brazil, C\u00f4ng-g\u00f4, Nam Phi. <\/p>\n

Tuy nhi\u00ean vi\u1ec7c g\u00e2y tr\u1ed3ng thu\u1ea7n lo\u00e0i b\u1ea1ch \u0111\u00e0n tr\u00ean di\u1ec7n r\u1ed9ng \u0111\u00e3 d\u1eabn t\u1edbi nhi\u1ec1u b\u1ec7nh h\u1ea1i l\u00e1 v\u00e0 th\u00e2n c\u00e2y. N\u0103m 1976, Pitkethley \u0111\u00e3 ph\u00e1t hi\u1ec7n ra n\u1ea5m Cylindrocladium quinqueseptatum<\/i>tr\u00ean c\u00e1c c\u00e2y non h\u1ecd Sim (Myrtaceae<\/i>) t\u1ea1i \u00d4xtr\u00e2ylia. Ti\u1ebfn s\u0129 Sharma trong c\u00e1c n\u0103m 1982, 1985 c\u00f9ng \u0111\u1ed3ng nghi\u1ec7p \u0111\u00e3 \u0111\u1ec1 c\u1eadp` v\u1ec1 b\u1ec7nh b\u1ea1ch \u0111\u00e0n v\u00e0 lo\u00e0i n\u1ea5m h\u1ea1i Cylindrocladium<\/i> \u1edf \u1ea5n \u0110\u1ed9. C\u00e1c nghi\u00ean c\u1ee9u \u1edf \u00d4xtr\u00e2ylia (Bolland et al., 1985), Brazil (Alfenas et al., 1997; Junghans et al., 1999) v\u00e0 Nam Phi (Crous and Swart, 1995; Crous et al., 1993) \u0111\u1ec1u \u0111\u00e3 \u0111\u1ec1 c\u1eadp v\u1ec1 b\u1ec7nh \u1edf b\u1ea1ch \u0111\u00e0n. \u0110\u1ed1i v\u1edbi c\u00e1c r\u1eebng tr\u1ed3ng \u0111\u01a1n d\u00f2ng v\u00f4 t\u00ednh \u1edf Th\u00e1i Lan, lo\u1ea1i b\u1ec7nh nguy hi\u1ec3m nh\u1ea5t l\u1ea1i l\u00e0 Cryptosporiopsis<\/i> v\u00e0 n\u00f3 \u0111\u00e3 g\u00e2y h\u1ea1i cho nhi\u1ec1u r\u1eebng tr\u1ed3ng \u1edf \u0111\u00e2y trong \u0111\u00f3 c\u00f3 40ha r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n d\u00f2ng T5 n\u0103ng su\u1ea5t cao \u1edf g\u1ea7n Pataya b\u1ecb ch\u1ebft ho\u00e0n to\u00e0n. Tr\u00ean c\u01a1 s\u1edf \u0111\u00f3 c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 ch\u1ecdn gi\u1ed1ng kh\u00e1ng b\u1ec7nh c\u0169ng \u0111\u00e3 b\u01b0\u1edbc \u0111\u1ea7u \u0111\u01b0\u1ee3c tri\u1ec3n khai, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf Brazil cho b\u1ec7nh “stem canker”. Nh\u00ecn chung ch\u1ecdn gi\u1ed1ng kh\u00e1ng b\u1ec7nh cho c\u00e1c lo\u00e0i b\u1ea1ch \u0111\u00e0n \u1edf v\u00f9ng \u0110\u00f4ng Nam \u00e1 m\u1edbi ch\u1ec9 l\u00e0 nh\u1eefng b\u01b0\u1edbc kh\u1edfi \u0111\u1ea7u, trong khi \u1edf c\u00e1c n\u01b0\u1edbc n\u1ed5i ti\u1ebfng v\u1ec1 tr\u1ed3ng b\u1ea1ch \u0111\u00e0n nh\u01b0 Brazil, Nam Phi l\u1ea1i \u0111\u00e3 thu \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 th\u00e0nh c\u00f4ng nh\u1ea5t \u0111\u1ecbnh. <\/p>\n

\u1edf Vi\u1ec7t Nam t\u1eeb cu\u1ed1i nh\u1eefng n\u0103m 1980, \u0111\u1ea7u 1990 \u0111\u1ebfn nay d\u1ecbch b\u1ec7nh ch\u00e1y l\u00e1, ch\u1ebft ng\u1ecdn \u0111\u00e3 xu\u1ea5t hi\u1ec7n tr\u00ean di\u1ec7n r\u1ed9ng \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 lo\u00e0i b\u1ea1ch \u0111\u00e0n v\u00e0 m\u1ed9t s\u1ed1 lo\u00e0i keo, \u0111\u1eb7c bi\u1ec7t \u1edf v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 v\u00e0 mi\u1ec1n Trung (g\u1ed3m c\u00e1c t\u1ec9nh Qu\u1ea3ng Nam, \u0110\u00e0 N\u1eb5ng v\u00e0 Th\u1eeba Thi\u00ean Hu\u1ebf). Theo k\u1ebft qu\u1ea3 \u0111i\u1ec1u tra, \u0111\u00e1nh gi\u00e1 c\u1ee7a m\u1ed9t s\u1ed1 t\u00e1c gi\u1ea3 (Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a, 1992; Sharma, 1994; Old and Yuan, 1995) cho th\u1ea5y di\u1ec7n t\u00edch r\u1eebng b\u1ea1ch \u0111\u00e0n b\u1ecb b\u1ec7nh l\u00ean t\u1edbi 50% t\u1ed5ng di\u1ec7n t\u00edch v\u1edbi c\u00e1c m\u1ee9c \u0111\u1ed9 h\u1ea1i kh\u00e1c nhau v\u00e0 \u0111\u1ec1u c\u1ea3nh b\u00e1o nguy c\u01a1 g\u00e2y h\u1ea1i l\u1edbn \u0111\u1ed1i v\u1edbi r\u1eebng tr\u1ed3ng t\u1eadp trung. <\/p>\n

R\u1eebng tr\u1ed3ng m\u00f4 hom b\u1ea1ch \u0111\u00e0n nh\u1eadp n\u1ed9i \u1edf n\u01b0\u1edbc ta c\u0169ng \u0111\u00e3 cho th\u1ea5y d\u1ea5u hi\u1ec7u b\u1ec7nh h\u1ea1i \u1edf nhi\u1ec1u n\u01a1i, do v\u1eady b\u00ean c\u1ea1nh c\u00e1c bi\u1ec7n ph\u00e1p g\u00e2y tr\u1ed3ng ph\u00f9 h\u1ee3p th\u00ec vi\u1ec7c tuy\u1ec3n ch\u1ecdn gi\u1ed1ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh l\u00e0 y\u00eau c\u1ea7u c\u1ea5p thi\u1ebft c\u1ee7a s\u1ea3n xu\u1ea5t. \u0110\u1ec3 ti\u1ebfn h\u00e0nh c\u00f4ng t\u00e1c ch\u1ecdn gi\u1ed1ng kh\u00e1ng b\u1ec7nh c\u1ea7n ph\u1ea3i \u0111i\u1ec1u tra x\u00e1c \u0111\u1ecbnh c\u00e1c lo\u1ea1i b\u1ec7nh, ph\u00e2n lo\u1ea1i b\u1ec7nh nguy hi\u1ec3m v\u00e0 b\u1ec7nh ti\u1ec1m n\u0103ng tr\u00ean c\u01a1 s\u1edf \u0111\u00f3 tuy\u1ec3n ch\u1ecdn c\u00e2y tr\u1ed9i kh\u00f4ng b\u1ecb b\u1ec7nh ho\u1eb7c kh\u00f4ng b\u1ecb c\u00e1c b\u1ec7nh nguy hi\u1ec3m.<\/p>\n","protected":false},"excerpt":{"rendered":"

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 tuy\u1ec3n ch\u1ecdn \u0111\u01b0\u1ee3c 73 gia \u0111\u00ecnh lo\u00e0i b\u1ea1ch \u0111\u00e0n E.camaldulensis c\u00f3 c\u1ea5p b\u1ec7nh t\u1eeb 1-4 v\u00e0 sinh tr\u01b0\u1edfng kh\u00e1 t\u1eeb 150 gia \u0111\u00ecnh b\u1ea1ch \u0111\u00e0n FORTIP; t\u1eeb r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t \u0111\u00e3 tuy\u1ec3n ch\u1ecdn \u0111\u01b0\u1ee3c 78 c\u00e2y tr\u1ed9i b\u1ea1ch \u0111\u00e0n E.camaldulensis ch\u1ed1ng ch\u1ecbu b\u1ec7nh v\u00e0 sinh tr\u01b0\u1edfng nhanh. \u0110\u01b0a v\u00e0o kh\u1ea3o nghi\u1ec7m 136 d\u00f2ng b\u1ea1ch \u0111\u00e0n t\u1ea1i c\u00e1c v\u00f9ng c\u00f3 b\u1ec7nh nguy hi\u1ec3m t\u1eeb \u0111\u00f3 tuy\u1ec3n ch\u1ecdn \u0111\u01b0\u1ee3c c\u00e1c d\u00f2ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh. C\u00e1c d\u00f2ng b\u1ea1ch \u0111\u00e0n FORTIP c\u00f3 tri\u1ec3n v\u1ecdng l\u00e0 EF18, EF43, EF29, EF55, E7 v\u00e0 EF23 \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng nhanh, \u0111\u1ea1t t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n tr\u00ean 20m3\/ha\/n\u0103m v\u00e0 ch\u1ed1ng ch\u1ecbu t\u1ed1t v\u1edbi b\u1ec7nh h\u1ea1i l\u00e1 t\u1ea1i S\u00f4ng M\u00e2y (\u0110\u1ed3ng Nai) \u1edf giai \u0111o\u1ea1n 4 n\u0103m tu\u1ed5i. <\/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\/8898"}],"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=8898"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8898\/revisions"}],"predecessor-version":[{"id":10354,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8898\/revisions\/10354"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}