N\u01b0\u1edbc l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00e2n t\u1ed1 quan tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c c\u01a1 th\u1ec3 s\u1ed1ng. V\u1edbi th\u1ef1c v\u1eadt, khi h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc trong t\u1ebf b\u00e0o gi\u1ea3m, m\u1ed9t lo\u1ea1t ch\u1ee9c n\u0103ng sinh l\u00fd quan tr\u1ecdng nh\u01b0 quang h\u1ee3p, h\u00f4 h\u1ea5p s\u1ebd b\u1ecb k\u00ecm h\u00e3m v\u00e0 do \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y. N\u01b0\u1edbc kh\u00f4ng ch\u1ec9 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t dung m\u00f4i, m\u1ed9t ch\u1ea5t ph\u1ea3n \u1ee9ng m\u00e0 n\u01b0\u1edbc c\u00f2n tham gia v\u00e0o c\u1ea5u tr\u00fac c\u1ee7a t\u1ebf b\u00e0o. Ngo\u00e0i nh\u1eefng vai tr\u00f2 quan tr\u1ecdng tr\u00ean, n\u01b0\u1edbc c\u00f2n l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 n\u1ed1i li\u1ec1n c\u00e2y v\u1edbi m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i v\u00e0 \u0111i\u1ec1u ho\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u00e2y. <\/p>\n
\u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ebf \u0111\u1ed9 n\u01b0\u1edbc \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u1edf m\u1ee9c \u0111\u1ed9 t\u1ebf b\u00e0o trong nh\u1eefng nghi\u00ean c\u1ee9u c\u1ee7a Kramer (1983), Wang v\u00e0 c\u1ed9ng s\u1ef1 (1988), Sands v\u00e0 Mulligan (1990) vv\u2026 V\u1ec1 m\u1eb7t h\u00ecnh th\u00e1i, Boyer (1968) cho r\u1eb1ng s\u1ef1 l\u1edbn l\u00ean c\u1ee7a l\u00e1 r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi ch\u1ebf \u0111\u1ed9 t\u01b0\u1edbi n\u01b0\u1edbc, khi thi\u1ebfu n\u01b0\u1edbc l\u00e1 c\u00e2y th\u01b0\u1eddng nh\u1ecf. T\u1ed5ng tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4 c\u1ee7a c\u1ee7a b\u1ea1ch \u0111\u00e0n Eucalyptus globulus<\/i> b\u1ecb gi\u1ea3m nhi\u1ec1u trong \u0111i\u1ec1u ki\u1ec7n thi\u1ebfu n\u01b0\u1edbc, nguy\u00ean nh\u00e2n do s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a l\u00e1 m\u1edbi b\u1ecb h\u1ea1n ch\u1ebf d\u1eabn \u0111\u1ebfn t\u1ed5ng di\u1ec7n t\u00edch l\u00e1 gi\u1ea3m (Metcalfe v\u00e0 c\u1ed9ng s\u1ef1, 1989). \u0110\u1ed1i v\u1edbi lo\u00e0i th\u00f4ng \u0111\u1ecf s\u1ef1 n\u1ea3y ch\u1ed3i v\u00e0 t\u1ef7 l\u1ec7 s\u1ed1ng b\u1ecb gi\u1ea3m r\u1ea5t nhi\u1ec1u trong \u0111i\u1ec1u ki\u1ec7n \u0111\u1ed9 \u1ea9m kh\u00f4ng kh\u00ed th\u1ea5p. R\u1ec5 c\u1ee7a lo\u00e0i n\u00e0y c\u0169ng c\u00f3 xu h\u01b0\u1edbng ng\u1eebng ph\u00e1t tri\u1ec3n khi b\u1ecb thi\u1ebfu n\u01b0\u1edbc (Wilcox, 1968). <\/p>\n
\u1edf n\u01b0\u1edbc ta, m\u1ed1i quan h\u1ec7 gi\u1eefa n\u01b0\u1edbc v\u00e0 th\u1ef1c v\u1eadt c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u (Ho\u00e0ng Xu\u00e2n T\u00fd, 1998; Nguy\u1ec5n V\u0103n V\u1ee5, 1989). N\u0103m 1976, Nguy\u1ec5n Ng\u1ecdc T\u00e2n \u0111\u00e3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ed9 \u1ea9m \u0111\u1ea5t \u0111\u1ed1i v\u1edbi sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y h\u1ed3i (Illicium verum<\/i> Hook). Tuy nhi\u00ean nh\u1eefng nghi\u00ean c\u1ee9u n\u00e0y ch\u01b0a nhi\u1ec1u, \u0111\u1eb7c bi\u1ec7t trong ho\u00e0n c\u1ea3nh hi\u1ec7n nay, h\u1ea7u h\u1ebft c\u00e1c nghi\u00ean c\u1ee9u \u0111\u1ec1u t\u1eadp trung v\u00e0o nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng. <\/p>\n
V\u1ea1ng tr\u1ee9ng (Endospermum chinensis <\/i>Benth) l\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba m\u1ecdc nhanh, g\u1ed7 d\u00f9ng l\u00e0m di\u00eam, g\u1ed7 d\u00e1n l\u1ea1ng, b\u00fat ch\u00ec vv…, \u0111\u01b0\u1ee3c ch\u1ecdn cho tr\u1ed3ng r\u1eebng t\u1ea1i Vi\u1ec7t Nam. Nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y \u0111\u00e3 c\u00f3 m\u1ed9t s\u1ed1 nghi\u00ean c\u1ee9u v\u1ec1 lo\u00e0i c\u00e2y n\u00e0y v\u00e0 ban \u0111\u1ea7u \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 nh\u01b0 l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y c\u00f3 tri\u1ec3n v\u1ecdng trong tr\u1ed3ng r\u1eebng nguy\u00ean li\u1ec7u g\u1ed7 (Nguy\u1ec5n B\u00e1 Ch\u1ea5t, 2001; \u0110\u1eb7ng Th\u1ecbnh Tri\u1ec1u, 2002). B\u00e0i b\u00e1o n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ebf \u0111\u1ed9 t\u01b0\u1edbi n\u01b0\u1edbc \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y con v\u1ea1ng tr\u1ee9ng s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp.<\/p>\n","protected":false},"excerpt":{"rendered":"
N\u01b0\u1edbc l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00e2n t\u1ed1 quan tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c c\u01a1 th\u1ec3 s\u1ed1ng. V\u1edbi th\u1ef1c v\u1eadt, khi h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc trong t\u1ebf b\u00e0o gi\u1ea3m, m\u1ed9t lo\u1ea1t ch\u1ee9c n\u0103ng sinh l\u00fd quan tr\u1ecdng nh\u01b0 quang h\u1ee3p, h\u00f4 h\u1ea5p s\u1ebd b\u1ecb k\u00ecm h\u00e3m v\u00e0 do \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y. N\u01b0\u1edbc kh\u00f4ng ch\u1ec9 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t dung m\u00f4i, m\u1ed9t ch\u1ea5t ph\u1ea3n \u1ee9ng m\u00e0 n\u01b0\u1edbc c\u00f2n tham gia v\u00e0o c\u1ea5u tr\u00fac c\u1ee7a t\u1ebf b\u00e0o. Ngo\u00e0i nh\u1eefng vai tr\u00f2 quan tr\u1ecdng tr\u00ean, n\u01b0\u1edbc c\u00f2n l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 n\u1ed1i li\u1ec1n c\u00e2y v\u1edbi m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i v\u00e0 \u0111i\u1ec1u ho\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u00e2y.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/170"}],"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=170"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/170\/revisions"}],"predecessor-version":[{"id":8427,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/170\/revisions\/8427"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}