{"id":1418,"date":"2019-05-03T08:23:56","date_gmt":"2019-05-03T01:23:56","guid":{"rendered":"http:\/\/demo.hoinongdanhp.org.vn\/?p=1418"},"modified":"2019-05-03T08:23:56","modified_gmt":"2019-05-03T01:23:56","slug":"ky-thuat-xu-ly-ra-hoa-tren-cay-buoi","status":"publish","type":"post","link":"https:\/\/hoinongdanhp.org.vn\/index.php\/2019\/05\/03\/ky-thuat-xu-ly-ra-hoa-tren-cay-buoi\/","title":{"rendered":"K\u1ef9 thu\u1eadt x\u1eed l\u00fd ra hoa tr\u00ean c\u00e2y b\u01b0\u1edfi"},"content":{"rendered":"

\t\t\t\trong vi\u1ec7c thay \u0111\u1ed5i t\u1eadp t\u00ednh c\u1ee7a c\u00e2y ph\u00f9 h\u1ee3p v\u1edbi s\u1ef1 mong mu\u1ed1n c\u1ee7a con ng\u01b0\u1eddi c\u00f3 nhi\u1ec1u v\u1ea5n \u0111\u1ec1 c\u1ea7n ph\u1ea3i gi\u1ea3i quy\u1ebft. N\u1ebfu ch\u00fang ta mu\u1ed1n thay \u0111\u1ed5i chu k\u1ef3 t\u1ef1 nhi\u00ean c\u1ee7a c\u00e2y, vi\u1ec7c \u0111\u1ea7u ti\u00ean l\u00e0 c\u00e2y \u0103n qu\u1ea3 ph\u1ea3i \u0111\u01b0\u1ee3c tr\u1ed3ng trong \u0111i\u1ec1u ki\u1ec7n ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c, ch\u00fang ta ph\u1ea3i t\u00e1c \u0111\u1ed9ng m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt \u0111\u1ec3 thay \u0111\u1ed5i t\u1eadp qu\u00e1n, chu k\u1ef3 ph\u00e1t tri\u1ec3n cu\u1ea3 c\u00e2y nh\u1eb1m ng\u0103n ch\u1eb7n s\u1ef1 sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n dinh d\u01b0\u1ee1ng. B\u1edfi v\u00ec c\u00e2y kh\u00f4ng d\u1ec3 d\u00e0ng h\u00ecnh th\u00e0nh m\u1ea7m hoa khi c\u00e2y \u0111ang \u1edf giai \u0111o\u1ea1n sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n dinh d\u01b0\u1ee1ng.<\/strong>\n\n\n

\n\"\"\"\"\n<\/div>\n\n\n\u1ede nh\u1eefng v\u00f9ng c\u00f3 h\u1ec7 th\u1ed1ng t\u01b0\u1edbi ti\u00eau, ng\u01b0ng t\u01b0\u1edbi n\u01b0\u1edbc t\u1ea1m th\u1eddi t\u1ea1o kh\u00f4 h\u1ea1n nh\u00e2n t\u1ea1o s\u1ebd l\u00e0m cho c\u00e2y t\u1ea1m d\u1eebng sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n dinh d\u01b0\u1ee1ng. Vi\u1ec7c g\u00e2y “stress\u201d cho c\u00e2y \u0103n qu\u1ea3 b\u1eb1ng c\u00e1c bi\u1ec7n ph\u00e1p nh\u01b0: khoang v\u1ecf, xi\u1ebft n\u01b0\u1edbc, x\u00f4ng kh\u00f3i ho\u1eb7c s\u1eed d\u1ee5ng ho\u00e1 ch\u1ea5t s\u1ebd gia t\u0103ng nhanh ch\u00f3ng h\u00e0m l\u01b0\u1ee3ng AAB trong c\u00e2y v\u00e0 l\u00e1, m\u00e0 AAB l\u00e0 m\u1ed9t ch\u1ea5t \u1ee9c ch\u1ebf sinh tr\u01b0\u1edfng r\u1ea5t m\u1ea1nh v\u00ec v\u1eady s\u1ebd ng\u0103n ch\u1eb7n s\u1ef1 sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n dinh d\u01b0\u1ee1ng c\u1ee7a c\u00e2y, bu\u1ed9c ch\u00fang chuy\u1ec3n sang giai \u0111oan sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n sinh s\u1ea3n. M\u1ed7i bi\u1ec7n ph\u00e1p \u0111\u1ec1u c\u00f3 nh\u1eefng \u01b0u v\u00e0 khuy\u1ebft \u0111i\u1ec3m c\u1ee7a n\u00f3, tu\u1ef3 lo\u1ea1i c\u00e2y tr\u1ed3ng, tu\u1ed5i c\u00e2y, t\u00ecnh tr\u1ea1ng dinh d\u01b0\u1ee1ng, \u0111i\u1ec1u ki\u1ec7n ngo\u1ea1i c\u1ea3nh,\u2026m\u00e0 ch\u00fang ta \u00e1p bi\u1ec7n ph\u00e1p x\u1eed l\u00fd ra hoa th\u00edch h\u1ee3p.\nC\u00f3 3 ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd ra hoa th\u01b0\u1eddng \u00e1p d\u1ee5ng tr\u00ean b\u01b0\u1edfi:\n1\/ X\u1eed l\u00fd ra hoa b\u1eb1ng c\u00e1ch t\u1ea1o s\u1ef1 kh\u00f4 h\u1ea1n:\nM\u1ed9t trong nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u00e2y c\u00f3 m\u00fai n\u00f3i chung v\u00e0 c\u00e2y b\u01b0\u1edfi n\u00f3i ri\u00eang so v\u1edbi nh\u1eefng lo\u1ea1i c\u00e2y \u0103n tr\u00e1i kh\u00e1c l\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c nhau gi\u1eefa m\u1ea7m ch\u1ed3i v\u00e0 m\u1ea7m tr\u00e1i. Kh\u00f4ng c\u00f3 s\u1ef1 bi\u1ebfn chuy\u1ec3n c\u1ee7a ch\u1ed3i trong nhi\u1ec1u n\u0103m m\u00e0 m\u1ed7i ch\u1ed3i c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n trong m\u1ed9t n\u0103m \u0111\u1ec3 t\u1ea1o m\u1ea7m hoa v\u00e0 s\u1ebd mang m\u1ed9t hay nhi\u1ec1u tr\u00e1i \u1edf cu\u1ed1i c\u00e0nh.\nC\u00e2y b\u01b0\u1edfi ra hoa c\u1ea7n th\u1eddi gian kh\u00f4 h\u1ea1n \u0111\u1ec3 ph\u00e2n ho\u00e1 m\u1ea7m hoa, v\u00ec v\u1eady \u1edf c\u00e1c v\u01b0\u1eddn qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c n\u01b0\u1edbc th\u00ec c\u00f3 th\u1ec3 t\u1ea1o s\u1ef1 kh\u00f4 h\u1ea1n \u0111\u1ec3 c\u00e2y ra hoa \u0111\u1ed3ng lo\u1ea1t. Vi\u1ec7c t\u1ea1o kh\u00f4 h\u1ea1n v\u00e0o th\u00e1ng 12-01 d\u01b0\u01a1ng l\u1ecbch s\u1ebd thu ho\u1ea1ch qu\u1ea3 v\u00e0o T\u1ebft Trung Thu (kho\u1ea3ng th\u00e1ng 7-8 d\u01b0\u01a1ng l\u1ecbch); ho\u1eb7c t\u1ea1o kh\u00f4 h\u1ea1n \u1edf th\u00e1ng 3-4 d\u01b0\u01a1ng l\u1ecbch thu ho\u1ea1ch qu\u1ea3 v\u00e0o t\u1ebft Nguy\u00ean \u0110\u00e1n (kho\u1ea3ng th\u00e1ng 12 d\u01b0\u01a1ng l\u1ecbch). G\u1eb7p l\u00fac m\u01b0a th\u00ec c\u00f3 th\u1ec3 d\u00f9ng t\u1ea5m nylon \u0111en che ph\u1ee7 chung quanh g\u1ed1c c\u0169ng c\u00f3 th\u1ec3 t\u1ea1o s\u1ef1 kh\u00f4 h\u1ea1n \u0111\u1ec3 x\u1eed l\u00fd ra hoa, tuy nhi\u00ean ph\u1ea3i t\u1ed1n chi ph\u00ed \u0111\u1ec3 mua nylon v\u00e0 t\u1ef7 l\u1ec7 ra hoa kh\u00f4ng cao. Sau khi thu ho\u1ea1ch xong ti\u1ebfn h\u00e0nh v\u1ec7 sinh v\u01b0\u1eddn nh\u01b0: c\u1eaft t\u1ec9a c\u00e0nh gi\u00e0, c\u00e0nh s\u00e2u b\u1ec7nh, l\u00e0m c\u1ecf, qu\u00e9t v\u00f4i g\u1ed1c… k\u1ebf \u0111\u1ebfn b\u00f3n ph\u00e2n v\u1edbi li\u1ec1u l\u01b0\u1ee3ng t\u00f9y thu\u1ed9c v\u00e0o s\u1ef1 sinh tr\u01b0\u1edfng v\u00e0 tu\u1ed5i c\u00e2y.\nC\u00e2y \u0111\u01b0\u1ee3c b\u00f3n ph\u00e2n l\u1ea7n 2 tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh ng\u01b0ng x\u1eed l\u00fd ra hoa. M\u1ef1c n\u01b0\u1edbc trong m\u01b0\u01a1ng \u0111\u01b0\u1ee3c kh\u1ed1ng ch\u1ebf \u1edf m\u1ee9c th\u1ea5p nh\u1ea5t nh\u01b0ng ph\u1ea3i tr\u00ean t\u1ea7ng ph\u00e8n ti\u1ec1m t\u00e0ng. Th\u1eddi gian t\u1ea1o kh\u00f4 h\u1ea1n t\u1eeb 7 -20 ng\u00e0y tu\u1ef3 thu\u1ed9c v\u00e0o \u0111\u1ed9 \u1ea9m c\u1ee7a \u0111\u1ea5t v\u00e0 t\u00ecnh tr\u1ea1ng thi\u1ebfu n\u01b0\u1edbc c\u1ee7a b\u1ed9 l\u00e1 c\u00e2y b\u01b0\u1edfi m\u00e0 quy\u1ebft \u0111\u1ecbnh t\u01b0\u1edbi tr\u1edf l\u1ea1i. C\u00f3 th\u1ec3 k\u1ebft h\u1ee3p v\u00e9t s\u00ecnh l\u00ean khi li\u1ebfp, khi s\u00ecnh kh\u00f4, n\u1ee9t n\u1ebb th\u00ec ti\u1ebfn h\u00e0nh t\u01b0\u1edbi tr\u1edf l\u1ea1i. Th\u00f4ng th\u01b0\u1eddng khi th\u1ea5y tri\u1ec7u ch\u1ee9ng l\u00e1 x\u00e0o th\u00ec b\u1eaft \u0111\u1ea7u t\u01b0\u1edbi n\u01b0\u1edbc tr\u1edf l\u1ea1i, m\u1ed7i ng\u00e0y 2-3 l\u1ea7n v\u00e0 t\u01b0\u1edbi li\u00ean t\u1ee5c 3 ng\u00e0y. \u0110\u1ebfn ng\u00e0y th\u1ee9 4, t\u01b0\u1edbi n\u01b0\u1edbc m\u1ed7i ng\u00e0y\/l\u1ea7n. 7-15 ng\u00e0y sau khi t\u01b0\u1edbi \u0111\u1ee3t \u0111\u1ea7u ti\u00ean c\u00e2y s\u1ebd ra hoa, th\u1eddi gian n\u00e0y ng\u00e0y t\u01b0\u1edbi ng\u00e0y ngh\u0129. 10-15 ng\u00e0y sau khi c\u00e2y tr\u1ed5 hoa s\u1ebd r\u1ee5ng c\u00e1nh hoa (\u0111\u1eadu qu\u1ea3).\n\u01afu \u0111i\u1ec3m: cung c\u1ea5p th\u00eam dinh d\u01b0\u1ee1ng cho c\u00e2y b\u01b0\u1edfi n\u1ebfu xi\u1ebft n\u01b0\u1edbc c\u00f3 k\u1ebft h\u1ee3p v\u1edbi v\u00e9t s\u00ecnh. C\u00e2y ra hoa t\u1eadp trung v\u00e0 \u0111\u1ed3ng lo\u1ea1t. Thu\u1eadn l\u1ee3i trong ch\u0103m s\u00f3c, ph\u00f2ng ng\u1eeba s\u00e2u b\u1ec7nh v\u00e0 thu ho\u1ea1ch. T\u1ed5ng thu nh\u1eadp m\u1ed9t l\u1ea7n b\u00e1n s\u1ebd cao h\u01a1n so v\u1edbi \u0111\u1ec3 ra hoa t\u1ef1 nhi\u00ean.\nNh\u01b0\u1ee3c \u0111i\u1ec3m: th\u00f4ng qua v\u00e9t s\u00ecnh, x\u00e1c b\u1ea3 th\u1ef1c v\u1eadt ch\u01b0a ph\u00e2n hu\u1ef7 ho\u00e0n to\u00e0n ho\u1eb7c t\u1ea7ng ph\u00e8n ti\u1ec1m t\u00e0ng v\u00f4 t\u00ecnh b\u1ecb \u0111\u01b0a l\u00ean li\u1ebfp c\u00f3 th\u1ec3 g\u00e2y \u0111\u1ed9c cho c\u00e2y b\u01b0\u1edfi. B\u1ed9 r\u1ec5 c\u00f3 khuynh h\u01b0\u1edbng \u0103n s\u00e2u t\u00ecm ngu\u1ed3n n\u01b0\u1edbc trong th\u1eddi gian xi\u1ebft n\u01b0\u1edbc v\u00ec v\u1eady b\u1ed9 r\u1ec5 d\u1ec5 b\u1ecb \u00fang, th\u00fai do m\u1ef1c thu\u1ef7 c\u1ea5p cao hay t\u1ea7ng ph\u00e8n ti\u1ebfm t\u00e0ng g\u00e2y ra. B\u1ed9 r\u1ec5 suy y\u1ebfu d\u1ec5 b\u1ecb s\u00e2u b\u1ec7nh h\u1ea1i t\u1ea5n c\u00f4ng trong th\u1eddi gian t\u1ea1o kh\u00f4 h\u1ea1n.\n2\/ L\u1ea3i b\u1ecf l\u00e1 tr\u00ean c\u00e0nh mang tr\u00e1i: sau khi thu ho\u1ea1ch xong c\u0169ng ti\u1ebfn h\u00e0nh v\u1ec7 sinh v\u01b0\u1eddn nh\u01b0: c\u1eaft t\u1ec9a c\u00e0nh gi\u00e0, c\u00e0nh s\u00e2u b\u1ec7nh, l\u00e0m c\u1ecf, qu\u00e9t v\u00f4i g\u1ed1c… k\u1ebf \u0111\u1ebfn b\u00f3n ph\u00e2n l\u1ea7n 2 (\u0111\u1ea1m th\u1ea5p, l\u00e2n v\u00e0 kali cao) v\u1edbi li\u1ec1u l\u01b0\u1ee3ng t\u00f9y thu\u1ed9c v\u00e0o s\u1ef1 sinh tr\u01b0\u1edfng v\u00e0 tu\u1ed5i c\u00e2y. Khi to\u00e0n b\u1ed9 l\u00e1 tr\u00ean c\u00e2y gi\u00e0 v\u00e0 kh\u00f4ng c\u00f3 t\u01b0\u1ee3t non xu\u1ea5t hi\u1ec7n th\u00ec ti\u1ebfn h\u00e0nh l\u1eb7t b\u1ecf l\u00e1 tr\u00ean c\u00e0nh mang qu\u1ea3 (th\u01b0\u1eddng r\u1ea5t ng\u1eafn kho\u1ea3ng 10 – 20 cm). C\u00e0nh n\u00e0y th\u01b0\u1eddng m\u1ecdc \u1edf ch\u1ea3ng 2 ho\u1eb7c ch\u1ea3ng 3 c\u1ee7a c\u00e2y. N\u1ebfu ch\u00fang ta kh\u00f4ng l\u1ea3i l\u00e1 th\u00ec c\u00e0nh n\u00e0y c\u0169ng s\u1ebd mang tr\u00e1i sau \u0111\u00f3 nh\u01b0ng mu\u1ed9n h\u01a1n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p l\u1ea3i b\u1ecf l\u00e1 tr\u01b0\u1edbc. Ch\u00fa \u00fd b\u1eaft \u0111\u1ea7u l\u1ea3i l\u00e1 t\u1eeb c\u00e0nh mang tr\u00e1i \u1edf v\u1ecb tr\u00ed g\u1ea7n m\u1eb7t \u0111\u1ea5t tr\u01b0\u1edbc sau \u0111\u00f3 ti\u1ebfn d\u1ea7n \u0111\u1ebfn v\u1ecb tr\u00ed cao, n\u00ean ch\u1ecdn nh\u1eefng c\u00e0nh gi\u00e0, th\u00e2n v\u00e0 l\u00e0 c\u00f3 m\u00e0u xanh \u0111\u1eadm. T\u00f9y t\u00ecnh tr\u1ea1ng sinh tr\u01b0\u1eddng v\u00e0 tu\u1ed5i c\u00e2y m\u00e0 c\u00e0nh n\u00e0y s\u1ebd cho hoa nhanh hay ch\u1eadm.\n\u01afu \u0111i\u1ec3m: k\u1ef9 thu\u1eadt n\u00e0y \u0111\u01a1n gi\u1ea3n d\u1ec3 l\u00e0m, kh\u00f4ng t\u1ed1n ho\u00e1 ch\u1ea5t \u0111\u1ec3 x\u1eed l\u00fd ra hoa. Tr\u00e1i b\u01b0\u1edfi n\u1eb1m b\u00ean trong t\u00e1n n\u00ean ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c c\u00e2y ch\u1ed1ng \u0111\u1ee1, h\u1ea1n ch\u1ebf tr\u00e1i b\u01b0\u1edfi b\u1ecb n\u00e1m n\u1eafng. Tr\u00e1i ra theo v\u1ecb tr\u00ed mong mu\u1ed1n n\u00ean thu\u1eadn l\u1ee3i trong ch\u0103m s\u00f3c v\u00e0 thu ho\u1ea1ch.\nNh\u01b0\u1ee3c \u0111i\u1ec3m: t\u1ed1n c\u00f4ng lao \u0111\u1ed9ng trong tr\u01b0\u1eddng h\u1ee3p \u00e1p d\u1ee5ng v\u00e0o trang tr\u1ea1i c\u00f3 di\u1ec7n t\u00edch l\u1edbn t\u1eeb v\u00e0i hecta tr\u1edf l\u00ean; Kh\u00f3 \u00e1p d\u1ee5ng cho c\u00e2y b\u01b0\u1edfi \u0111\u00e3 nhi\u1ec1u n\u0103m tu\u1ed5i, c\u00e2y cao tr\u00ean 3 m\u00e9t, gi\u00e0 c\u1ecfi.\n3\/ X\u1eed l\u00fd ra hoa b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ho\u00e1 ch\u1ea5t: c\u00f3 th\u1ec3 d\u00f9ng Paclobutrazol \u1edf li\u1ec1u l\u01b0\u1ee3ng 2,5g-5gr ai\/ c\u00e2y (t\u00f9y theo tu\u1ed5i c\u00e2y v\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e2y m\u00e0 t\u0103ng gi\u1ea3m li\u1ec1u l\u01b0\u1ee3ng) t\u01b0\u1edbi xung quanh g\u1ed1c ho\u1eb7c phun l\u00ean c\u00e2y \u1edf n\u1ed3ng \u0111\u1ed9 1000-2000ppm c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng gi\u00fap c\u00e2y b\u01b0\u1edfi ra hoa. Tr\u00ean c\u00e2y b\u01b0\u1edfi n\u0103m Roi phun Paclobutrazol n\u1ed3ng \u0111\u1ed9 1.000ppm, sau \u0111\u00f3 30 ng\u00e0y phun ti\u1ebfp Thiourea n\u1ed3ng \u0111\u1ed9 0,3% s\u1ebd gi\u00fap b\u01b0\u1edfi n\u0103m roi ra hoa \u0111\u1ea1t t\u1ef7 l\u1ec7 cao (Tr\u1ea7n v\u0103n H\u00e2u, 2005). Tr\u00ean b\u01b0\u1edfi long C\u1ed5 C\u00f2 5 n\u0103m tu\u1ed5i qu\u00e9t Paclobutrazol li\u1ec1u l\u01b0\u1ee3ng 1 gr ai\/g\u1ed1c \u0111\u1ea1t t\u1ef7 l\u1ec7 ra hoa 60-70%. Ho\u1eb7c d\u00f9ng Ethrel 500ppm phun l\u00ean l\u00e1 ho\u1eb7c t\u01b0\u1edbi g\u1ed1c. Tr\u01b0\u1edbc khi x\u1eed l\u00fd h\u00f3a ch\u1ea5t th\u00ec c\u00e2y c\u0169ng \u0111\u01b0\u1ee3c b\u00f3n ph\u00e2n l\u1ea7n 2 (tr\u01b0\u1edbc ra hoa), sau khi x\u1eed l\u00fd h\u00f3a ch\u1ea5t c\u0169ng c\u1ea7n gi\u1ea3m d\u1ea7n l\u01b0\u1ee3ng n\u01b0\u1edbc t\u01b0\u1edbi v\u00e0 khi c\u00e2y ra hoa th\u00ec t\u01b0\u1edbi n\u01b0\u1edbc tr\u1edf l\u1ea1i.\nVi\u1ec7c s\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t \u0111\u1ec3 x\u1eed l\u00fd ra hoa cho c\u00e2y b\u01b0\u1edfi c\u1ea7n ph\u1ea3i th\u1eadn tr\u1ecdng v\u00ec c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn c\u00e2y b\u01b0\u1edfi, n\u00ean l\u00e0m th\u1eed nghi\u1ec7m m\u1ed9t v\u00e0i c\u00e2y \u1edf c\u00e1c n\u1ed3ng \u0111\u1ed9 t\u1eeb th\u1ea5p \u0111\u1ebfn cao t\u1eeb \u0111\u00f3 r\u00fat ra kinh nghi\u1ec7m tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh s\u1eed d\u1ee5ng \u0111\u1ea1i tr\u00e0 tr\u00ean v\u01b0\u1eddn.\n\u01afu \u0111i\u1ec3m: c\u00e2y ra hoa theo \u00fd mu\u1ed1n; \u00cdt ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 t\u00e1c \u0111\u1ed9ng \u1ea9m \u0111\u1ed9 trong \u0111\u1ea5t trong th\u1eddi gian x\u1eed l\u00fd; Thu\u1eadn l\u1ee3i trong ch\u0103m s\u00f3c, ph\u00f2ng ng\u1eeba s\u00e2u b\u1ec7nh v\u00e0 thu ho\u1ea1ch; T\u1ed5ng thu nh\u1eadp m\u1ed9t l\u1ea7n b\u00e1n s\u1ebd cao h\u01a1n so v\u1edbi \u0111\u1ec3 ra hoa t\u1ef1 nhi\u00ean.\nNh\u01b0\u1ee3c \u0111i\u1ec3m: t\u1ed1n chi ph\u00ed mua ho\u00e1 ch\u1ea5t, c\u00f4ng lao \u0111\u1ed9ng khi phun ho\u1eb7c t\u01b0\u1edbi; Kh\u00f4ng an to\u00e0n cho ng\u01b0\u1eddi ti\u00eau d\u00f9ng n\u1ebfu ho\u00e1 ch\u1ea5t c\u00f2n l\u01b0u t\u1ed3n trong tr\u00e1i; S\u1eed d\u1ee5ng ho\u00e1 ch\u1ea5t li\u1ec1u cao c\u00f3 th\u1ec3 l\u00e0m g\u00e2y h\u1ea1i b\u1ed9 r\u1ec3 c\u1ee7a c\u00e2y b\u01b0\u1edfi, ti\u00eau di\u1ec7t vi sinh v\u1eadt c\u00f3 \u00edch trong \u0111\u1ea5t, g\u00e2y \u00f4 nhi\u1ec3m m\u00f4i tr\u01b0\u1eddng.\nC\u00e1c y\u1ebfu t\u1ed1 li\u00ean quan \u0111\u1ec3 vi\u1ec7c x\u1eed l\u00fd ra hoa b\u01b0\u1edfi \u0111\u01b0\u1ee3c th\u00e0nh c\u00f4ng: c\u00e2y ph\u1ea3i \u0111\u01b0\u1ee3c tr\u1ed3ng tr\u00ean m\u00f4 \u0111\u1ea5t cao v\u00e0 v\u01b0\u1eddn ph\u1ea3i c\u00f3 h\u1ec7 th\u1ed1ng t\u01b0\u1edbi ti\u00eau ch\u1ee7 \u0111\u1ed9ng \u0111\u01b0\u1ee3c ngu\u1ed3n n\u01b0\u1edbc trong m\u01b0\u01a1ng khi t\u1ea1o kh\u00f4 h\u1ea1n \u0111\u1ec3 \u0111\u1ea5t nhanh kh\u00f4 r\u00e1o, gi\u00fap vi\u1ec7c c\u00e2y ph\u00e2n h\u00f3a m\u1ea7m hoa t\u1ed1t h\u01a1n; Kho\u1ea3ng c\u00e1ch tr\u1ed3ng kh\u00f4ng \u0111\u01b0\u1ee3c qu\u00e1 d\u00e0y s\u1ebd g\u00e2y kh\u00f3 kh\u0103n trong vi\u1ec7c t\u1ea1o kh\u00f4 h\u1ea1n cho c\u00e2y b\u01b0\u1edfi; Th\u1eddi gian t\u1ea1o kh\u00f4 h\u1ea1n ph\u1ea3i t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1ee7 \u0111\u1ec3 c\u00e2y ph\u00e2n h\u00f3a m\u1ea7m hoa.\n+ Tr\u01b0\u1edbc giai \u0111o\u1ea1n x\u1eed l\u00fd ra hoa, c\u00e2y kh\u00f4ng \u0111\u01b0\u1ee3c b\u00f3n qu\u00e1 nhi\u1ec1u ph\u00e2n b\u00f3n c\u00f3 h\u00e0m l\u01b0\u1ee3ng N cao.\n+ Trong th\u1eddi gian x\u1eed l\u00fd ra hoa tr\u00ean c\u00e2y b\u01b0\u1edfi kh\u00f4ng \u0111\u01b0\u1ee3c mang qu\u00e1 nhi\u1ec1u tr\u00e1i ho\u1eb7c tr\u00e1i \u0111ang \u1edf c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n kh\u00e1c nhau.\n+ C\u00e0nh v\u01b0\u1ee3t ph\u1ea3i \u0111\u01b0\u1ee3c t\u1ec9a b\u1ecf th\u01b0\u1eddng xuy\u00ean v\u00e0 tr\u00ean c\u00e2y b\u01b0\u1edfi kh\u00f4ng c\u00f3 nhi\u1ec1u t\u01b0\u1ee3c non.\nT\u00f3m l\u1ea1i, Vi\u1ec7c x\u1eed l\u00fd ra hoa tr\u00ean c\u00e2y b\u01b0\u1edfi kh\u00f4ng kh\u00f3 n\u1ebfu ch\u00fang ta \u00e1p d\u1ee5ng \u0111\u00fang k\u1ef9 thu\u1eadt. Tu\u1ef3 t\u1eebng \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 m\u00e0 ch\u00fang ta ch\u1ecdn bi\u1ec7n ph\u00e1p x\u1eed l\u00fd ra hoa t\u1ed1i \u01b0u cho c\u00e2y b\u01b0\u1edfi. V\u1ea5n \u0111\u1ec1 \u0111\u1eb7t ra cho nh\u00e0 v\u01b0\u1eddn hi\u1ec7n nay l\u00e0 th\u1eddi \u0111i\u1ec3m x\u1eed l\u00fd ra hoa l\u00fac n\u00e0o \u0111\u1ec3 b\u00e1n tr\u00e1i \u0111\u01b0\u1ee3c gi\u00e1 nh\u1ea5t, thu l\u1ee3i nhu\u1eadn cao.]]>\t\t<\/p>\n","protected":false},"excerpt":{"rendered":"

\t\t\t\t\t\t<\/p>\n","protected":false},"author":1,"featured_media":1420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[27],"tags":[],"class_list":{"0":"post-1418","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-khoa-hoc-ky-thuat"},"_links":{"self":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/posts\/1418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/comments?post=1418"}],"version-history":[{"count":0,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/posts\/1418\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/media\/1420"}],"wp:attachment":[{"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/media?parent=1418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/categories?post=1418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hoinongdanhp.org.vn\/index.php\/wp-json\/wp\/v2\/tags?post=1418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}