{"id":9387,"date":"2010-07-28T06:49:24","date_gmt":"2010-07-27T23:49:24","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2010\/07\/nghien-cuu-chi-so-canh-tranh-trong-rung-la-rong-thuong-xanh-o-kon-ha-nung\/"},"modified":"2015-05-19T14:33:01","modified_gmt":"2015-05-19T07:33:01","slug":"nghien-cuu-chi-so-canh-tranh-trong-rung-la-rong-thuong-xanh-o-kon-ha-nung","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-chi-so-canh-tranh-trong-rung-la-rong-thuong-xanh-o-kon-ha-nung\/","title":{"rendered":"Nghi\u00ean c\u1ee9u ch\u1ec9 s\u1ed1 c\u1ea1nh tranh trong r\u1eebng l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh \u1edf Kon H\u00e0 N\u1eebng"},"content":{"rendered":"

Nguy\u1ec5n Thanh S\u01a1n, Tr\u1ea7n V\u0103n Con <\/strong><\/p>\n

Ph\u00f2ng Nghi\u00ean c\u1ee9u K\u1ef9 thu\u1eadt L\u00e2m sinh<\/em><\/p>\n

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

Nguy\u1ec5n Danh<\/strong><\/p>\n

Ph\u00f3 tr\u01b0\u1edfng \u0111o\u00e0n \u0110BQH t\u1ec9nh Gia Lai<\/em><\/strong><\/p>\n

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

Ch\u1ec9 s\u1ed1 c\u1ea1nh tranh ph\u1ea3n \u00e1nh ph\u00e2n b\u1ed1 kh\u00f4ng gian sinh tr\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00e2y c\u00e1 th\u1ec3 trong m\u1ed9t l\u00e2m ph\u1ea7n v\u00e0 s\u1ef1 t\u01b0\u01a1ng t\u00e1c c\u1ea1nh tranh gi\u1eefa ch\u00fang v\u1ec1 chi\u1ebfm l\u0129nh kh\u00f4ng gian v\u00e0 t\u1eadn d\u1ee5ng ngu\u1ed3n t\u00e0i nguy\u00ean. Ch\u1ec9 s\u1ed1 c\u1ea1nh tranh c\u00f3 th\u1ec3 ph\u1ee5 thu\u1ed9c ho\u1eb7c kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u1ecb th\u1ebf c\u1ee7a c\u00e2y t\u00f9y theo c\u00e1ch t\u00ednh to\u00e1n c\u00f3 d\u1ef1a v\u00e0o kho\u1ea3ng c\u00e1ch \u0111\u1ebfn c\u00e1c c\u00e2y k\u1ebf c\u1eadn hay kh\u00f4ng. B\u00e0i b\u00e1o \u0111\u00e3 x\u00e1c \u0111\u1ecbnh hai nh\u00f3m c\u00e1c ch\u1ec9 ti\u00eau c\u1ea1nh tranh: (i) nh\u00f3m c\u00e1c ch\u1ec9 s\u1ed1 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u1ecb th\u1ebf x\u00e3 h\u1ed9i bao g\u1ed3m ti\u1ebft di\u1ec7n l\u00e2m ph\u1ea7n, k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a c\u00e2y, ch\u1ec9 s\u1ed1 TCI; v\u00e0 (ii) nh\u00f3m c\u00e1c ch\u1ec9 s\u1ed1 ph\u1ee5 thu\u1ed9c v\u1ecb th\u1ebf x\u00e3 h\u1ed9i bao g\u1ed3m v\u1ecb th\u1ebf c\u00e2y theo Dawkin v\u00e0 v\u00f9ng \u1ea3nh h\u01b0\u1edfng ch\u1ed3ng nhau CIO. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y c\u00e1c ch\u1ec9 ti\u00eau n\u00e0y c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n ph\u1ea3n \u1ee9ng sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y c\u00e1 th\u1ec3 b\u1eb1ng c\u00e1c m\u00f4 h\u00ecnh m\u00f4 ph\u1ecfng l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p x\u1eed l\u00fd l\u00e2m sinh trong nu\u00f4i d\u01b0\u1ee1ng r\u1eebng t\u1ef1 nhi\u00ean.<\/p>\n

T\u1eeb kh\u00f3a: <\/strong>Ch\u1ec9 s\u1ed1 c\u1ea1nh tranh, R\u1eebng t\u1ef1 nhi\u00ean l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh, Sinh tr\u01b0\u1edfng, T\u1ef7 l\u1ec7 ch\u1ebft.<\/strong><\/p>\n

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

C\u00e1c \u00fd t\u01b0\u1edfng hi\u1ec7n c\u00f3 v\u1ec1 s\u1ef1 c\u1ea1nh tr\u1ea1nh gi\u1eefa c\u00e1c c\u00e2y trong l\u00e2m ph\u1ea7n c\u00f3 th\u1ec3 t\u00f3m t\u1eaft \u1edf 5 ti\u00ean \u0111\u1ec1 sau \u0111\u00e2y (Ford v\u00e0 Sorrensen, 1992): (i) C\u00e2y r\u1eebng l\u00e0m thay \u0111\u1ed5i m\u00f4i tr\u01b0\u1eddng ch\u00fang s\u1ed1ng theo h\u01b0\u1edbng l\u00e0m gi\u1ea3m ngu\u1ed3n s\u1ed1ng c\u1ee7a c\u00e1c c\u00e2y kh\u00e1c (c\u1ea1nh tranh); (ii) C\u01a1 ch\u1ebf b\u1eadc m\u1ed9t c\u1ee7a c\u1ea1nh tranh l\u00e0 s\u1ef1 t\u01b0\u01a1ng t\u00e1c v\u1ec1 kh\u00f4ng gian sinh tr\u01b0\u1edfng; (iii) C\u00e2y b\u1ecb ch\u1ebft l\u00e0 do khi c\u1ea1nh tranh \u0111\u00e3 ph\u1ea3n \u1ee9ng ch\u1eadm h\u01a1n d\u1eabn \u0111\u1ebfn sinh tr\u01b0\u1edfng b\u1ecb suy gi\u1ea3m khi ngu\u1ed3n l\u1ef1c b\u1ecb c\u1ea1n ki\u1ec7t; (iv) C\u00e2y r\u1eebng t\u1ef1 \u0111i\u1ec1u ch\u1ec9nh theo thay \u0111\u1ed5i c\u1ee7a m\u00f4i tr\u01b0\u1eddng, ph\u1ea3n \u1ee9ng v\u1edbi s\u1ef1 c\u1ea1nh tranh v\u00e0 thay \u0111\u1ed5i b\u1ea3n ch\u1ea5t c\u1ee7a c\u1ea1nh tranh; v\u00e0 (v) C\u00f3 s\u1ef1 kh\u00e1c nhau theo lo\u00e0i trong qu\u00e1 tr\u00ecnh c\u1ea1nh tranh. C\u00e1c nh\u00e0 sinh th\u00e1i h\u1ecdc \u0111\u00e3 s\u1eed d\u1ee5ng r\u1ea5t nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 c\u1ea1nh tranh \u0111\u1ebfn qu\u00e1 tr\u00ecnh sinh tr\u01b0\u1edfng v\u00e0 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a c\u00e2y r\u1eebng. C\u00e1ch ti\u1ebfp c\u1eadn th\u00f4ng d\u1ee5ng nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng c\u00e1c m\u00f4 h\u00ecnh h\u1ed3i qui \u0111\u1ec3 ki\u1ec3m \u0111\u1ecbnh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e1c ch\u1ec9 s\u1ed1 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e2y c\u1ea1nh tranh v\u1edbi nhau (Bella1971; Hegyi 1974, …). C\u00f3 hai ph\u01b0\u01a1ng ph\u00e1p c\u01a1 b\u1ea3n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u1ec9 s\u1ed1 c\u1ea1nh tranh: (1) C\u00e1c ph\u01b0\u01a1ng ph\u00e1pd\u1ef1a tr\u00ean c\u00e1c tham s\u1ed1 th\u1ed1ng k\u00ea \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c \u00f4 \u0111o \u0111\u1ebfm (c\u00f2n g\u1ecdi l\u00e0 ph\u01b0\u01a1ng ph\u00e1p kh\u00f4ng ph\u1ee5 thu\u1ed9c kho\u1ea3ng c\u00e1ch), kh\u00f4ng c\u1ea7n bi\u1ebft \u0111\u1ebfn v\u1ecb tr\u00ed x\u00e3 h\u1ed9i c\u1ee7a c\u00e2y trong l\u00e2m ph\u1ea7n, do \u0111\u00f3 v\u1ec1 m\u1eb7t ph\u01b0\u01a1ng ph\u00e1p vi\u1ec7c ph\u00e2n t\u00edch s\u1ed1 li\u1ec7u \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 th\u1ef1c hi\u1ec7n h\u01a1n. (2) C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u1ee5 thu\u1ed9c kho\u1ea3ng c\u00e1ch d\u1ef1a tr\u00ean v\u1ecb th\u1ebf x\u00e3 h\u1ed9i c\u1ee7a c\u00e2y trong l\u00e2m ph\u1ea7n (Ek v\u00e0 Monserud, 1974.<\/p>\n

(Trang 1141-1148)<\/p>\n","protected":false},"excerpt":{"rendered":"

\nCh\u1ec9 s\u1ed1 c\u1ea1nh tranh ph\u1ea3n ánh phân b\u1ed1 không gian sinh tr\u01b0\u1edfng c\u1ee7a các cây cá th\u1ec3 trong m\u1ed9t lâm ph\u1ea7n và s\u1ef1 t\u01b0\u01a1ng tác c\u1ea1nh tranh gi\u1eefa chúng v\u1ec1 chi\u1ebfm l\u0129nh không gian và t\u1eadn d\u1ee5ng ngu\u1ed3n tài nguyên. Ch\u1ec9 s\u1ed1 c\u1ea1nh tranh có th\u1ec3 ph\u1ee5 thu\u1ed9c ho\u1eb7c không ph\u1ee5 thu\u1ed9c v\u1ecb th\u1ebf c\u1ee7a cây tùy theo cách tính toán có d\u1ef1a vào kho\u1ea3ng cách \u0111\u1ebfn các cây k\u1ebf c\u1eadn hay không. Bài báo \u0111ã xác \u0111\u1ecbnh hai nhóm các ch\u1ec9 tiêu c\u1ea1nh tranh: (i) nhóm các ch\u1ec9 s\u1ed1 không ph\u1ee5 thu\u1ed9c v\u1ecb th\u1ebf xã h\u1ed9i bao g\u1ed3m ti\u1ebft di\u1ec7n lâm ph\u1ea7n, kích th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a cây, ch\u1ec9 s\u1ed1 TCI; và (ii) nhóm các ch\u1ec9 s\u1ed1 ph\u1ee5 thu\u1ed9c v\u1ecb th\u1ebf xã h\u1ed9i bao g\u1ed3m v\u1ecb th\u1ebf cây theo Dawkin và vùng \u1ea3nh h\u01b0\u1edfng ch\u1ed3ng nhau CIO. K\u1ebft qu\u1ea3 nghiên c\u1ee9u cho th\u1ea5y các ch\u1ec9 tiêu này có th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 d\u1ef1 \u0111oán ph\u1ea3n \u1ee9ng sinh tr\u01b0\u1edfng c\u1ee7a cây cá th\u1ec3 b\u1eb1ng các mô hình mô ph\u1ecfng làm c\u01a1 s\u1edf cho vi\u1ec7c \u0111\u1ec1 xu\u1ea5t các bi\u1ec7n pháp x\u1eed lý lâm sinh trong nuôi d\u01b0\u1ee1ng r\u1eebng t\u1ef1 nhiên.<\/span><\/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\/9387"}],"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=9387"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9387\/revisions"}],"predecessor-version":[{"id":15275,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9387\/revisions\/15275"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}