Nh\u1eefng chuy\u1ec7n th\u00fa v\u1ecb trong th\u1ebf gi\u1edbi t\u1ef1 nhi\u00ean nhi\u1ec1u v\u00f4 k\u1ec3, kh\u00f4ng bi\u1ebft c\u00e1c b\u1ea1n \u0111\u00e3 ch\u00fa \u00fd \u0111\u1ebfn ch\u01b0a, b\u1ea5t lu\u1eadn l\u00e0 c\u00e1c lo\u1ea1i c\u00e2y cao \u0111\u1ebfn 100 m\u00e9t ho\u1eb7c nh\u1eefng c\u00e2y ch\u1ec9 cao c\u00f3 v\u00e0i cm, m\u1eb7c d\u00f9 b\u1ec1 ngo\u00e0i c\u1ee7a ch\u00fang c\u1ef1c k\u1ef3 d\u1ecb th\u01b0\u1eddng nh\u01b0ng c\u1ea3 \u0111\u1eddi ch\u00fang l\u00e0 nh\u01b0 v\u1eady: Khi h\u1ea1t \u0111\u01b0\u1ee3c gieo xu\u1ed1ng \u0111\u1ea5t, g\u1eb7p ph\u1ea3i \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng th\u00edch h\u1ee3p l\u00e0 n\u1ea3y m\u1ea9m, sinh tr\u01b0\u1edfng, ra hoa k\u1ebft tr\u00e1i, trong h\u1ea1t gi\u1ed1ng l\u1ea1i \u1ea5p \u1ee7 h\u1ea1t cu\u1ea3 th\u1ebf h\u1ec7 th\u1ee9 hai, cu\u1ed1i c\u00f9ng l\u00e0 ch\u1ebft \u0111i.<\/p>\n\n\n\n
Nh\u01b0ng th\u1eddi gian c\u1ea9n thi\u1ebft \u0111\u1ec3 ch\u00fang ho\u00e0n th\u00e0nh qu\u00e1 tr\u00ecnh s\u1ed1ng nh\u01b0 v\u1eady ph\u1ea3i c\u0103n c\u1ee9 v\u00e0o c\u00e1c \u0111\u1eb7c t\u00ednh kh\u00e1c nhau c\u1ee7a c\u00e1c lo\u1ea1i th\u1ef1c v\u1eadt, \u0111\u1ed3ng th\u1eddi kh\u00f4ng ho\u00e0n to\u00e0n gi\u1ed1ng nhau, th\u1eadm ch\u00ed c\u00e1ch nhau m\u1ea5y ch\u1ee5c l\u1ea9n \u0111\u1ebfn m\u1ea5y tr\u0103m l\u1ea9n. C\u00f3 lo\u1ea1i ch\u1ec9 c\u1ea9n m\u1ed9t n\u0103m (t\u1eeb m\u00f9a xu\u00e2n \u0111\u1ebfn m\u00f9a thu) nh\u01b0 c\u00e1c lo\u1ea1i th\u1ef1c v\u1eadt n\u00f4ng nghi\u1ec7p: l\u00faa, cao l\u01b0\u01a1ng, ng\u00f4, khoai. m\u1ecdi ng\u01b0\u1eddi g\u1ecdi ch\u00fang l\u00e0 th\u1ef1c v\u1eadt s\u1ed1ng m\u1ed9t n\u0103m. C\u00f3 lo\u1ea1i th\u1ef1c v\u1eadt ph\u1ea3i c\u1ea9n \u0111\u1ebfn hai n\u0103m m\u1edbi c\u00f3 th\u1ec3 ho\u00e0n th\u00e0nh, trong \u0111\u00f3 ph\u1ea3i ngh\u1ec9 qua m\u1ed9t m\u00f9a \u0111\u00f4ng, \u0111\u1ebfn n\u0103m sau m\u1edbi sinh tr\u01b0\u1edfng hoa th\u00e2n, ra hoa k\u1ebft qu\u1ea3 nh\u01b0 rau c\u1ea3i d\u1ea9u, ti\u1ec3u m\u1ea1ch v\u1ee5 \u0111\u00f4ng l\u00e0 nh\u01b0 v\u1eady, m\u1ecdi ng\u01b0\u1eddi g\u1ecdi ch\u00fang l\u00e0 th\u1ef1c v\u1eadt s\u1ed1ng hai n\u0103m. Nh\u1eefng lo\u1ea1i n\u00e0y \u0111a s\u1ed1 l\u00e0 nh\u1eefng th\u1ef1c v\u1eadt thu\u1ed9c lo\u1ea1i c\u1ecf.<\/p>\n\n\n\n
Th\u1ef1c v\u1eadt lo\u1ea1i g\u1ed7 th\u00ec l\u1ea1i kh\u00e1c xa, c\u00f3 lo\u1ea1i c\u1ea9n m\u01b0\u1eddi m\u1ea5y n\u0103m, m\u1ea5y ch\u1ee5c n\u0103m th\u1eadm ch\u00ed m\u1ea5y tr\u0103m n\u0103m, m\u1ea5y ng\u00e0n n\u0103m m\u1edbi ho\u00e0n th\u00e0nh chu k\u1ef3 s\u1ed1ng c\u1ee7a ch\u00fang. Cho d\u00f9 nh\u01b0 v\u1eady, n\u00f3 c\u0169ng gi\u1ed1ng nh\u01b0 th\u1ef1c v\u1eadt kh\u00e1c, quy lu\u1eadt c\u01a1 b\u1ea3n c\u1ee7a cu\u1ed9c s\u1ed1ng \u0111\u1ec1u l\u00e0 t\u1eeb ph\u00e1t d\u1ee5c, sinh tr\u01b0\u1edfng \u0111\u1ebfn gi\u00e0 y\u1ebfu v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 ch\u1ebft, tr\u00ean th\u1ebf gi\u1edbi kh\u00f4ng c\u00f3 lo\u00e0i th\u1ef1c v\u1eadt n\u00e0o l\u00e0 c\u00f3 th\u1ec3 s\u1ed1ng m\u00e3i kh\u00f4ng gi\u00e0. C\u00f3 lo\u1ea1i th\u1ef1c v\u1eadt n\u00e0o s\u1ed1ng kh\u00f4ng \u0111\u1ebfn m\u1ed9t n\u0103m kh\u00f4ng? C\u0169ng c\u00f3 v\u00e0 ch\u1ee7ng lo\u1ea1i c\u1ee7a ch\u00fang c\u0169ng kh\u00f4ng \u00edt. Trong gi\u1edbi th\u1ef1c v\u1eadt, c\u00f3 lo\u1ea1i ch\u1ec9 s\u1ed1ng v\u1ecfn v\u1eb9n v\u00e0i th\u00e1ng, c\u00f3 lo\u1ea1i th\u1eadm ch\u00ed ch\u1ec9 s\u1ed1ng m\u1ea5y ch\u1ee5c ng\u00e0y. Nh\u01b0 ch\u00fang ta th\u01b0\u1eddng nh\u00ecn th\u1ea5y tr\u00ean m\u00e1ng ng\u00f3i tr\u00ean m\u00e1i nh\u00e0 c\u00f3 m\u1ed9t lo\u1ea1i c\u1ecf nhi\u1ec1u th\u1ecbt c\u00f3 th\u1ec3 n\u1edf b\u00f4ng hoa nh\u1ecf n\u0103m c\u00e1nh m\u00e0u v\u00e0ng, g\u1ecdi l\u00e0 Ngo\u00e3 t\u00f9ng, sau c\u01a1n m\u01b0a ch\u00fang m\u1edbi m\u1ecdc l\u00ean, r\u1ea5t nhanh ch\u00f3ng n\u1edf hoa, qua m\u00f9a m\u01b0a th\u00ec kh\u00f4 m\u00e0 ch\u1ebft. C\u00f2n c\u00f3 m\u1ed9t lo\u1ea1i H\u1ea1 kh\u00f4 th\u1ea3o d\u00f9ng l\u00e0m thu\u1ed1c trong \u0110\u00f4ng y, m\u00f9a xu\u00e2n n\u1ea3y m\u1ea9m, m\u00f9a h\u1ea1 v\u1eeba \u0111\u1ebfn th\u00ec n\u00f3 \u0111\u00e3 tuy\u00ean b\u1ed1 k\u1ebft th\u00fac m\u1ed9t \u0111\u1eddi. N\u1ebfu mu\u1ed1n n\u00f3i lo\u1ea1i th\u1ef1c v\u1eadt th\u1eadt s\u1ef1 ng\u1eafn th\u00ec tr\u00ean v\u00f9ng sa m\u1ea1c c\u00f3 r\u1ea5t nhi\u1ec1u. V\u00ed d\u1ee5 nh\u01b0 c\u00fac \u0111o\u1ea3n m\u1ec7nh, y\u1ebfu \u0111i\u1ec3m l\u1edbn nh\u1ea5t c\u1ee7a nh\u1eefng th\u1ef1c v\u1eadt \u0111o\u1ea3n m\u1ec7nh n\u00e0y l\u00e0 s\u1ee3 kh\u00f4 h\u1ea1n. Tr\u00ean sa m\u1ea1c, l\u01b0\u1ee3ng m\u01b0a kh\u00f4ng nh\u1eefng c\u1ef1c k\u1ef3 \u00edt m\u00e0 c\u00f2n t\u1eadp trung c\u1ee7a s\u1ef1 xu\u1ed1ng th\u1ea5p trong m\u1ed9t th\u1eddi gian ng\u1eafn, do \u0111\u00f3 ch\u00fang ph\u1ea3i ho\u00e0n th\u00e0nh chu k\u1ef3 s\u1ed1ng trong th\u1eddi gian ng\u1eafn kho\u1ea3ng 20 \u0111\u1ebfn 30 ng\u00e0y, ho\u1eb7c trong m\u1ea5y tu\u1ea9n sau khi m\u01b0a xu\u00e2n r\u01a1i xu\u1ed1ng m\u1ed7i n\u0103m th\u00ec ra hoa, k\u1ebft qu\u1ea3 v\u00e0 ch\u1ebft, sau \u0111\u00f3 l\u1ea1i kh\u00f4ng nh\u00ecn th\u1ea5y d\u1ea5u v\u1ebft c\u1ee7a ch\u00fang \u0111\u00e2u. Tu\u1ed5i th\u1ecd c\u1ee7a nh\u1eefng lo\u00e0i th\u1ef1c v\u1eadt tr\u00ean sa m\u1ea1c ng\u1eafn nh\u01b0 v\u1eady l\u00e0 do \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng kh\u00f4 h\u1ea1n c\u1ee7a sa m\u1ea1c t\u1ea1o n\u00ean, \u0111\u00e2y l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a s\u1ef1 th\u00edch \u1ee9ng v\u1edbi t\u1ef1 nhi\u00ean c\u1ee7a c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt.<\/p>\n","protected":false},"excerpt":{"rendered":"
Nh\u1eefng chuy\u1ec7n th\u00fa v\u1ecb trong th\u1ebf gi\u1edbi t\u1ef1 nhi\u00ean nhi\u1ec1u v\u00f4 k\u1ec3, kh\u00f4ng bi\u1ebft c\u00e1c b\u1ea1n \u0111\u00e3 ch\u00fa \u00fd \u0111\u1ebfn ch\u01b0a, b\u1ea5t lu\u1eadn l\u00e0 c\u00e1c lo\u1ea1i c\u00e2y cao \u0111\u1ebfn 100 m\u00e9t ho\u1eb7c nh\u1eefng c\u00e2y ch\u1ec9 cao c\u00f3 v\u00e0i cm, m\u1eb7c d\u00f9 b\u1ec1 ngo\u00e0i c\u1ee7a ch\u00fang c\u1ef1c k\u1ef3 d\u1ecb th\u01b0\u1eddng nh\u01b0ng c\u1ea3 \u0111\u1eddi ch\u00fang l\u00e0 nh\u01b0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1,15],"tags":[],"class_list":["post-10639","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=10639"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10639\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}