{"id":8780,"date":"2009-03-24T04:27:35","date_gmt":"2009-03-23T21:27:35","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/mot-so-ket-qua-chon-giong-bach-dan-co-nang-suat-cao-va-chong-chiu-benh-cho-trong-rung-tai-dong-nam-bo\/"},"modified":"2019-09-24T11:01:18","modified_gmt":"2019-09-24T04:01:18","slug":"mot-so-ket-qua-chon-giong-bach-dan-co-nang-suat-cao-va-chong-chiu-benh-cho-trong-rung-tai-dong-nam-bo","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/mot-so-ket-qua-chon-giong-bach-dan-co-nang-suat-cao-va-chong-chiu-benh-cho-trong-rung-tai-dong-nam-bo\/","title":{"rendered":"M\u1ed8T S\u1ed0 K\u1ebeT QU\u1ea2 CH\u1eccN GI\u1ed0NG B\u1ea0CH \u0110\u00c0N C\u00d3 N\u0102NG SU\u1ea4T CAO V\u00c0 CH\u1ed0NG CH\u1ecaU B\u1ec6NH CHO TR\u1ed2NG R\u1eeaNG T\u1ea0I \u0110\u00d4NG NAM B\u1ed8"},"content":{"rendered":"

Nguy\u1ec5n v\u0103n Chi\u1ebfn<\/em><\/strong><\/p>\n

Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a<\/em><\/strong><\/p>\n

Trung t\u00e2m KH&SX L\u00e2m nghi\u1ec7p \u0110.N.B\u1ed9<\/em><\/p>\n

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

B\u1ea1ch \u0111\u00e0n l\u00e0 lo\u00e0i c\u00e2y c\u00f3 t\u1ed1c \u0111\u1ed9 sinh tr\u01b0\u1edfng nhanh, chu k\u1ef3 khai th\u00e1c ng\u1eafn, c\u00f3 nhi\u1ec1u c\u00f4ng d\u1ee5ng kh\u00e1c nhau trong s\u1ea3n xu\u1ea5t, \u0111\u1eddi s\u1ed1ng kinh t\u1ebf v\u00e0 x\u00e3 h\u1ed9i n\u00ean b\u1ea1ch \u0111\u00e0n \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t trong nh\u1eefng lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u00ednh \u1edf n\u01b0\u1edbc ta. V\u00e0o cu\u1ed1i nh\u1eefng n\u0103m c\u1ee7a th\u1eadp k\u1ef7 80 v\u00e0 \u0111\u1ea7u th\u1eadp k\u1ef7 90, b\u1ea1ch \u0111\u00e0n l\u00e0 m\u1ed9t trong s\u1ed1 c\u00e1c lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc \u01b0a chu\u1ed9ng ch\u1ecdn l\u00e0m c\u00e2y tr\u1ed3ng r\u1eebng kinh t\u1ebf \u0111\u1ec3 g\u00e2y tr\u1ed3ng v\u1edbi quy m\u00f4 l\u1edbn t\u1ea1i nhi\u1ec1u n\u01a1i trong c\u1ea3 n\u01b0\u1edbc. V\u1edbi nh\u1eefng c\u1ed1 g\u1eafng v\u1ec1 ch\u1ecdn gi\u1ed1ng v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt th\u00e2m canh m\u00e0 n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n t\u1eebng b\u01b0\u1edbc \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/p>\n

Tuy nhi\u00ean, trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n n\u00f3i chung v\u00e0 r\u1eebng tr\u1ed3ng c\u00e1cd\u00f2ng v\u00f4 t\u00ednh b\u1ea1ch \u0111\u00e0n cao s\u1ea3n nh\u1eadp n\u1ed9i \u0111\u00e3 b\u1ecb m\u1ed9t s\u1ed1 l\u1ecdai s\u00e2u b\u1ec7nh g\u00e2y h\u1ea1i \u1edf c\u00e1c m\u1ee9c \u0111\u1ed9 kh\u00e1c nhau. \u0110\u1eb7c bi\u1ec7t \u0110\u00f4ng Nam b\u1ed9 l\u00e0 m\u1ed9t trong nh\u1eefng v\u00f9ng c\u00f3 d\u1ea5u hi\u1ec7u s\u00e2u b\u1ec7nh ph\u00e1t tri\u1ec3n m\u1ea1nh, do v\u1eady b\u00ean c\u1ea1nh c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt g\u00e2y tr\u1ed3ng ph\u00f9 h\u1ee3p th\u00ec 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. B\u00e1o c\u00e1o n\u00e0y gi\u1edbi thi\u1ec7u t\u00f3m t\u1eaft m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u1ecdn gi\u1ed1ng b\u1ea1ch \u0111\u00e0n th\u1ef1c hi\u1ec7n t\u1eeb tr\u01b0\u1edbc t\u1edbi nay t\u1ea1i \u0110\u00f4ng Nam B\u1ed9 nh\u1eb1m gi\u00fap c\u00e1c \u0111\u01a1n v\u1ecb s\u1ea3n xu\u1ea5t c\u00f3 c\u01a1 s\u1edf ch\u1ecdn \u0111\u00fang lo\u00e0i, xu\u1ea5t x\u1ee9 v\u00e0 c\u00e1cd\u00f2ng sinh tr\u01b0\u1edfng t\u1ed1t, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu b\u1ec7nhcao ph\u1ee5c v\u1ee5 cho tr\u1ed3ng r\u1eebng t\u1ea1i khu v\u1ef1c.<\/p>\n

1. V\u1eadt li\u1ec7u, \u0111\u1ecba \u0111i\u1ec3m, v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/strong><\/p>\n

1.1.V\u1eadt li\u1ec7u th\u00ed nghi\u1ec7m<\/em><\/strong><\/p>\n

* V\u1eadt li\u1ec7u cho c\u00e1c th\u00ed nghi\u1ec7m lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 (xx), g\u1ed3m c\u00f3 10 lo\u00e0i v\u00e0 56 xu\u1ea5t x\u1ee9 nh\u01b0 sau: E. camaldulensla<\/em>-16xx, E. tereticornis<\/em> – 6xx, E. brassiana<\/em> – 12xx, E. pellita<\/em> – 6xx, E. urophylla<\/em> – 5xx, E. grandis<\/em> – 1xx,E. exserta<\/em> – 1xx, E. Torelliana<\/em> – 4xx, E. deglupta<\/em> – 1xx, E. Resinisfera<\/em> – 4xx (ngu\u1ed3n h\u1ea1t gi\u1ed1ng t\u1eeb CSIRO-Australia).<\/p>\n

* V\u1eadt li\u1ec7u cho kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf d\u00f2ng v\u00f4 t\u00ednh: ngu\u1ed3n v\u1eadt li\u1ec7u cho x\u00e2y d\u1ef1ng khu kh\u1ea3o nghi\u1ec7m n\u0103m 1998 t\u1ea1i S\u00f4ng m\u00e2y, g\u1ed3m c\u00e1c c\u00e2y tr\u1ed9i \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn t\u1eeb n\u0103m 1990 \u0111\u1ebfn 1995 t\u1ea1i c\u00e1c m\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng v\u00e0 r\u1eebng tr\u1ed3ng TN \u1edf \u0110\u1ed3ng Nai, B.D\u01b0\u01a1ng, B.Ph\u01b0\u1edbc.<\/p>\n

* V\u1eadt li\u1ec7u cho kh\u1ea3o nghi\u1ec7m ch\u1ee9ng minh d\u00f2ng: g\u1ed3m 8 d\u00f2ng \u0111\u1ea7u b\u1ea3ng ch\u1ecdn t\u1eeb kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf 50 d\u00f2ng t\u1ea1i S\u00f4ng M\u00e2y (SM3, SM7, SM16, SM23, SM28, SM33, SM36, SM 42)<\/p>\n

* V\u1eadt li\u1ec7u l\u00e0m \u0111\u1ed1i ch\u1ee9ng cho c\u00e1c kh\u1ea3o nghi\u1ec7m th\u01b0\u1eddng s\u1eed d\u1ee5ng B\u1ea1ch \u0111\u00e0n n\u1ed9i \u0111\u1ecba ho\u1eb7c c\u00e1c d\u00f2ng \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt (3 d\u00f2ng nh\u1eadp n\u1ed9i U6, W5, GU8 v\u00e0 1 d\u00f2ng do Trung t\u00e2m ngi\u00ean c\u1ee9u c\u00e2y nguy\u00ean li\u1ec7u Ph\u00f9 Ninh tuy\u1ec3n ch\u1ecdn PN2).<\/p>\n

1.2. \u0110\u1ecba \u0111i\u1ec3m th\u00ed nghi\u1ec7m<\/em><\/strong><\/p>\n

1.2.1. \u0110i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba<\/em>: th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean 2 d\u1ea1ng l\u1eadp \u0111\u1ecba \u0111\u1eb7c tr\u01b0ng, \u0111\u00f3 l\u00e0:<\/p>\n

* <\/strong>D\u1ea1ng l\u1eadp \u0111\u1ecba Feralit v\u00f9ng \u0111\u1ed3i n\u00fai th\u1ea5p<\/em>: C\u00e1c kh\u1ea3o nghi\u1ec7m \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp t\u1ea1i tr\u1ea1m th\u00ed nghi\u1ec7m S\u00f4ng M\u00e2y, t\u1ec9nh \u0110\u1ed3ng Nai.<\/p>\n

– V\u1ecb tr\u00ed \u0111\u1ecba l\u00fd: 110<\/sup>03′ \u0111\u1ed9 v\u0129 B\u1eafc, 1060<\/sup>57′ \u0111\u1ed9 kinh \u0110\u00f4ng, \u0111\u1ed9 cao 60m so v\u1edbi m\u1eb7t bi\u1ec3n.<\/p>\n

– \u0110\u1ea5t: \u0111\u1ea5t feralit v\u00e0ng \u0111\u1ecf \u0111\u00e3 b\u1ecb b\u00e0o m\u00f2n v\u00e0 laterite h\u00f3a m\u1ea1nh taon\u00ean t\u1ea7ng \u0111\u1ea5t m\u1ecfng, ph\u00eda d\u01b0\u1edbi l\u00e0 qu\u00e1 tr\u00ecnh \u0111\u00e1 ong h\u00f3a ho\u1eb7c k\u1ebft von, pH: 4-5<\/p>\n

– \u0110\u1ecba h\u00ecnh: \u0111\u1ed3i d\u1ed1c t\u1eeb 15-200<\/sup> c\u00f3 n\u01a1 300<\/sup><\/p>\n

– L\u01b0\u1ee3ng m\u01b0a b\u00ecnh qu\u00e2n\/ n\u0103m: 2000mm – 2200mm, t\u1eadp trung v\u00e0o th\u00e1ng 6 – th\u00e1ng 10<\/p>\n

* D\u1ea1ng l\u1eadp \u0111\u1ecba ph\u00f9 sa c\u1ed5 \u0111\u1ecba h\u00ecnh b\u1eb1ng ph\u1eb3ng: C\u00e1c kh\u1ea3o nghi\u1ec7m \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp t\u1ea1i tr\u1ea1m th\u00ed nghi\u1ec7m B\u00e0u B\u00e0ng t\u1ec9nh B\u00ecnh D\u01b0\u01a1ng.<\/p>\n

– V\u1ecb tr\u00ed \u0111\u1ecba l\u00fd: 110<\/sup>15′ \u0111\u1ed9 v\u0129 B\u1eafc, 1060<\/sup>38′ \u0111\u1ed9 kinh \u0110\u00f4ng, \u0111\u1ed9 cao 8-10m so v\u1edbi m\u1eb7t bi\u1ec3n.<\/p>\n

– \u0110\u1ea5t: \u0111\u1ea5t x\u00e1m ph\u00f9 sa c\u1ed5, t\u1ea7ng d\u00e0y c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng gl\u00e2y h\u00f3a,ph\u00eda d\u01b0\u1edbi l\u00e0 t\u1ea7ng \u0111\u1ea5t s\u00e9t c\u00f3 ph\u00e8n ti\u1ec1m n\u0103ng h\u1ecdat \u0111\u1ed9ng, pH: 4-5<\/p>\n

– \u0110\u1ecba h\u00ecnh: b\u1eb1ng ph\u1eb3ng<\/p>\n

– L\u01b0\u1ee3ng m\u01b0a b\u00ecnh qu\u00e2n\/ n\u0103m: 1800mm – 2200mm, t\u1eadp trung v\u00e0o th\u00e1ng 6 – th\u00e1ng 10<\/p>\n","protected":false},"excerpt":{"rendered":"

B\u1ea1ch \u0111àn là loài cây có t\u1ed1c \u0111\u1ed9 sinh tr\u01b0\u1edfng nhanh, chu k\u1ef3 khai thác ng\u1eafn, có nhi\u1ec1u công d\u1ee5ng khác nhau trong s\u1ea3n xu\u1ea5t, \u0111\u1eddi s\u1ed1ng kinh t\u1ebf và xã h\u1ed9i nên b\u1ea1ch \u0111àn \u0111\u01b0\u1ee3c coi là m\u1ed9t trong nh\u1eefng loài cây tr\u1ed3ng r\u1eebng chính \u1edf n\u01b0\u1edbc ta. Vào cu\u1ed1i nh\u1eefng n\u0103m c\u1ee7a th\u1eadp k\u1ef7 80 và \u0111\u1ea7u th\u1eadp k\u1ef7 90, b\u1ea1ch \u0111àn là m\u1ed9t trong s\u1ed1 các loài cây \u0111\u01b0\u1ee3c các nhà \u0111\u1ea7u t\u01b0 trong và ngoài n\u01b0\u1edbc \u01b0a chu\u1ed9ng ch\u1ecdn làm cây tr\u1ed3ng r\u1eebng kinh t\u1ebf \u0111\u1ec3 gây tr\u1ed3ng v\u1edbi quy mô l\u1edbn t\u1ea1i nhi\u1ec1u n\u01a1i trong c\u1ea3 n\u01b0\u1edbc. V\u1edbi nh\u1eefng c\u1ed1 g\u1eafng v\u1ec1 ch\u1ecdn gi\u1ed1ng và các bi\u1ec7n pháp k\u1ef9 thu\u1eadt thâm canh mà n\u0103ng su\u1ea5t r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111àn t\u1eebng b\u01b0\u1edbc \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. Tuy nhiên, trong nh\u1eefng n\u0103m g\u1ea7n \u0111ây r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111àn nói chung và r\u1eebng tr\u1ed3ng các dòng vô tính b\u1ea1ch \u0111àn cao s\u1ea3n nh\u1eadp n\u1ed9i \u0111ã b\u1ecb m\u1ed9t s\u1ed1 l\u1ecdai sâu b\u1ec7nh gây h\u1ea1i \u1edf các m\u1ee9c \u0111\u1ed9 khác nhau. \u0110\u1eb7c bi\u1ec7t \u0110ông Nam b\u1ed9 là m\u1ed9t trong nh\u1eefng vùng có d\u1ea5u hi\u1ec7u sâu b\u1ec7nh phát tri\u1ec3n m\u1ea1nh, do v\u1eady bên c\u1ea1nh các bi\u1ec7n pháp k\u1ef9 thu\u1eadt gây tr\u1ed3ng phù h\u1ee3p thì tuy\u1ec3n ch\u1ecdn gi\u1ed1ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh là yêu c\u1ea7u c\u1ea5p thi\u1ebft c\u1ee7a s\u1ea3n xu\u1ea5t. Báo cáo này gi\u1edbi thi\u1ec7u tóm t\u1eaft m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nghiên c\u1ee9u ch\u1ecdn gi\u1ed1ng b\u1ea1ch \u0111àn th\u1ef1c hi\u1ec7n t\u1eeb tr\u01b0\u1edbc t\u1edbi nay t\u1ea1i \u0110ông Nam B\u1ed9 nh\u1eb1m giúp các \u0111\u01a1n v\u1ecb s\u1ea3n xu\u1ea5t có c\u01a1 s\u1edf ch\u1ecdn \u0111úng loài, xu\u1ea5t x\u1ee9 và các dòng sinh tr\u01b0\u1edfng t\u1ed1t, có kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu b\u1ec7nh cao ph\u1ee5c v\u1ee5 cho tr\u1ed3ng r\u1eebng t\u1ea1i khu v\u1ef1c. <\/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\/8780"}],"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=8780"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8780\/revisions"}],"predecessor-version":[{"id":19084,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8780\/revisions\/19084"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8780"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8780"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}