{"id":8736,"date":"2009-03-24T04:23:43","date_gmt":"2009-03-23T21:23:43","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/tham-do-phan-ung-cua-keo-lai-giai-doan-moi-trong-voi-phan-khoang-n-urea-k-kali-clorua-va-p-super-lan-bon-don-va-phoi-hop-tren-nen-datrung-tan-lap-binh-phuoc\/"},"modified":"2019-09-24T11:03:50","modified_gmt":"2019-09-24T04:03:50","slug":"tham-do-phan-ung-cua-keo-lai-giai-doan-moi-trong-voi-phan-khoang-n-urea-k-kali-clorua-va-p-super-lan-bon-don-va-phoi-hop-tren-nen-datrung-tan-lap-binh-phuoc","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/tham-do-phan-ung-cua-keo-lai-giai-doan-moi-trong-voi-phan-khoang-n-urea-k-kali-clorua-va-p-super-lan-bon-don-va-phoi-hop-tren-nen-datrung-tan-lap-binh-phuoc\/","title":{"rendered":"Th\u0103m d\u00f2 ph\u1ea3n \u1ee9ng c\u1ee7a keo lai giai \u0111o\u1ea1n m\u1edbi tr\u1ed3ng v\u1edbi ph\u00e2n kho\u00e1ng N (Urea), K (Kali clorua ) v\u00e0 P (Super l\u00e2n) b\u00f3n \u0111\u01a1n v\u00e0 ph\u1ed1i h\u1ee3p tr\u00ean n\u1ec1n \u0111\u1ea5tr\u1eebng T\u00e2n L\u1eadp, B\u00ecnh Ph\u01b0\u1edbc."},"content":{"rendered":"

Th\u0103m d\u00f2 ph\u1ea3n \u1ee9ng c\u1ee7a keo lai giai \u0111o\u1ea1n m\u1edbi tr\u1ed3ng v\u1edbi ph\u00e2n kho\u00e1ng N (Urea), K (Kali clorua ) v\u00e0 P (Super l\u00e2n) b\u00f3n \u0111\u01a1n v\u00e0 ph\u1ed1i h\u1ee3p tr\u00ean n\u1ec1n \u0111\u1ea5t r\u1eebng T\u00e2n L\u1eadp, B\u00ecnh Ph\u01b0\u1edbc.<\/strong><\/p>\n

Ph\u1ea1m Th\u1ebf D\u0169ng, Nguy\u1ec5n Th\u1ecb Thu\u1eadn,<\/em><\/strong><\/p>\n

Ng\u00f4 V\u0103n Ng\u1ecdc<\/em><\/strong><\/p>\n

Ph\u00e2n vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/em><\/p>\n

1. M\u1ee5c ti\u00eau th\u00ed nghi\u1ec7m<\/h6>\n

– So s\u00e1nh hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n kho\u00e1ng, b\u00f3n \u0111\u01a1n ho\u1eb7c ph\u1ed1i h\u1ee3p t\u1edbi sinh tr\u01b0\u1edfng c\u1ee7a keo lai.<\/p>\n

– X\u00e1c \u0111\u1ecbnh lo\u1ea1i ph\u00e2n v\u00e0 c\u00f4ng th\u1ee9c ph\u00e2n th\u00edch h\u1ee3p \u0111\u1ed1i v\u1edbi sinh tr\u01b0\u1edfng c\u1ee7a keo lai giai \u0111o\u1ea1n m\u1edbi tr\u1ed3ng.<\/p>\n

    \n
  1. V\u1eadt li\u1ec7u v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u.<\/strong><\/li>\n<\/ol>\n

    2.1. V\u1eadt li\u1ec7u v\u00e0 qui c\u00e1ch:<\/em><\/strong>Th\u00ed nghi\u1ec7m th\u1ef1c hi\u1ec7n trong ch\u1eadu<\/p>\n

    – Ch\u1eadu th\u00ed nghi\u1ec7m: ch\u1eadu s\u00e0nh c\u00f3 dung t\u00edch 25dm3<\/sup>.<\/p>\n

    – \u0110\u1ea5t tr\u1ed3ng: l\u1edbp \u0111\u1ea5t m\u1eb7t 30cm t\u1ea1i T\u00e2n L\u1eadp, \u0111\u1ea5t \u0111\u01b0\u1ee3c tr\u1ed9n \u0111\u1ec1u, nh\u1eb7t h\u1ebft r\u1ec5 c\u00e2y, c\u1ecf d\u1ea1i, \u0111\u1ed5 \u0111\u1ea7y t\u1edbi mi\u1ec7ng m\u1ed7i ch\u1eadu v\u00e0 sau 1 tu\u1ea7n, \u0111\u1ed5 th\u00eam \u0111\u1ea5t cho \u0111\u1ea7y ch\u1eadu.<\/p>\n

    – K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch \u0111\u1ea5t nh\u01b0 sau:<\/p>\n

    + pHH2<\/sub>O: 4.9<\/p>\n

    + M\u00f9n t\u1ed5ng s\u1ed1: 2.32 %<\/p>\n

    + N t\u1ed5ng s\u1ed1: 0.19%<\/p>\n

    + P2<\/sub>O5 <\/sub>t\u1ed5ng s\u1ed1: 0.11%<\/p>\n

    + K2<\/sub>O t\u1ed5ng s\u1ed1: 0.26 %<\/p>\n

    – C\u00e2y gi\u1ed1ng: C\u00e2y hom gi\u1ed1ng keo lai 2 th\u00e1ng tu\u1ed5i, d\u00f2ng TB06, cao trung b\u00ecnh 26cm, kho\u1ebb m\u1ea1nh, kh\u00f4ng s\u00e2u b\u1ec7nh.<\/p>\n

    – Ph\u00e2n b\u00f3n: ph\u00e2n b\u00f3n d\u00f9ng trong th\u00ed nghi\u1ec7m bao g\u1ed3m c\u00e1c lo\u1ea1i ph\u00e2n kho\u00e1ng: Urea (46\u201348% N), Super l\u00e2n (16\u201318% P2<\/sub>O5<\/sub>), Kali clorua (25\u201327% K2<\/sub>O). Ph\u00e2n \u0111\u01b0\u1ee3c c\u00e2n s\u1eb5n theo li\u1ec1u l\u01b0\u1ee3ng v\u00e0o c\u00e1c t\u00fai ri\u00eang bi\u1ec7t v\u00e0 \u0111\u01b0\u1ee3c b\u00f3n theo s\u01a1 \u0111\u1ed3 b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m \u0111\u00e3 chu\u1ea9n b\u1ecb s\u1eb5n. Th\u1ebb th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c c\u1eafm tr\u00ean m\u1ed7i ch\u1eadu ghi c\u00f4ng th\u1ee9c ph\u00e2n th\u00ed nghi\u1ec7m.<\/p>\n

    2. 2. Ph\u01b0\u01a1ng ph\u00e1p th\u00ed nghi\u1ec7m:<\/em><\/strong>Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong ch\u1eadu g\u1ed3m 8 nghi\u1ec7m th\u1ee9c 4 l\u1ea7n l\u1eadp l\u1ea1i, b\u1ed1 tr\u00ed theo ki\u1ec3u kh\u1ed1i ho\u00e0n to\u00e0n ng\u1eabu nhi\u00ean.<\/em><\/p>\n

    2.2.1. C\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n
    TT<\/strong><\/td>\nT\u00ean nghi\u1ec7m th\u1ee9c<\/strong><\/td>\nL\u01b0\u1ee3ng ph\u00e2n tinh<\/strong><\/p>\n

    (gr\/ ch\u1eadu)<\/strong><\/td>\n

    		L\u01b0\u1ee3ng ph\u00e2n qui \u0111\u1ed5i<\/strong><\/p>\n

    (gr\/ch\u1eadu)<\/strong><\/td>\n<\/tr>\n

    1<\/td>\n\n

    N<\/h2>\n<\/td>\n

    		7<\/td>\n15<\/td>\n<\/tr>\n
    2<\/td>\nP<\/td>\n6<\/td>\n35<\/td>\n<\/tr>\n
    3<\/td>\nK<\/td>\n4<\/td>\n15<\/td>\n<\/tr>\n
    4<\/td>\nNP<\/td>\n7 + 6<\/td>\n15 + 35<\/td>\n<\/tr>\n
    5<\/td>\nNK<\/td>\n7 + 4<\/td>\n15 + 15<\/td>\n<\/tr>\n
    6<\/td>\nPK<\/td>\n6 + 4<\/td>\n35 + 15<\/td>\n<\/tr>\n
    7<\/td>\nNPK<\/td>\n7 + 6 + 4<\/td>\n15 + 35 + 15<\/td>\n<\/tr>\n
    8<\/td>\n\u0110C (\u0111\u1ed1i ch\u1ee9ng)<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    2.2.2. Ch\u1ec9 ti\u00eau v\u00e0 ph\u01b0\u01a1ng ph\u00e1p theo d\u00f5i<\/em><\/p>\n

    – Chi\u1ec1u cao c\u00e2y: \u0110o t\u1eeb g\u1ed1c \u0111\u1ebfn ph\u1ea7n ng\u1ecdn cao nh\u1ea5t; \u0111o \u0111\u1ecbnh k\u1ef3 m\u1ed7i th\u00e1ng m\u1ed9t l\u1ea7n; m\u1ee9c t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 chi\u1ec1u cao c\u00e2y c\u1ee7a m\u1ed7i th\u00e1ng tr\u1eeb \u0111i chi\u1ec1u cao c\u00e2y c\u1ee7a th\u00e1ng tr\u01b0\u1edbc, \u0111\u01a1n v\u1ecb t\u00ednh l\u00e0 cm th\u00e1ng..<\/p>\n

    – \u0110\u01b0\u1eddng k\u00ednh g\u1ed1c: \u0110\u00e1nh d\u1ea5u \u0111i\u1ec3m \u0111o \u1edf s\u00e1t g\u1ed1c; d\u00f9ng th\u01b0\u1edbc k\u1eb9p \u0111o \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c h\u00e0ng th\u00e1ng c\u00f9ng v\u1edbi chi\u1ec1u cao c\u00e2y. C\u00e1ch t\u00ednh m\u1ee9c t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c t\u01b0\u01a1ng t\u1ef1 nh\u01b0 chi\u1ec1u cao c\u00e2y, \u0111\u01a1n v\u1ecb t\u00ednh l\u00e0 mm\/th\u00e1ng. V\u00ec c\u00e2y keo lai khi c\u00f2n nh\u1ecf g\u1ed1c ch\u01b0a tr\u00f2n n\u00ean 2 th\u00e1ng \u0111\u1ea7u kh\u00f4ng \u0111o \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c.<\/p>\n

    – Sinh kh\u1ed1i: sau khi x\u1eed l\u00fd ph\u00e2n b\u00f3n 9 th\u00e1ng nh\u1ed5 c\u00e2y, c\u00e2n to\u00e0n b\u1ed9 th\u00e2n, c\u00e0nh, l\u00e1, r\u1ec5. C\u00e2n t\u01b0\u01a1i ngay sau khi nh\u1ed5 c\u00e2y.<\/p>\n

    – Tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4: To\u00e0n b\u1ed9 c\u00e2y \u0111\u01b0\u1ee3c ch\u1eb7t, ch\u1ebb nh\u1ecf, ph\u01a1i v\u00e0 s\u1ea5y kh\u00f4 \u1edf nhi\u1ec7t \u0111\u1ed9 75o<\/sup>C \u0111\u1ebfn khi tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4ng thay \u0111\u1ed5i.<\/p>\n

    – T\u1ef7 l\u1ec7 % tr\u1ecdng l\u01b0\u1ee3ng r\u1ec5 so v\u1edbi to\u00e0n b\u1ed9 tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4 c\u1ee7a c\u00e2y.<\/p>\n

    – C\u00e1c ch\u1ec9 ti\u00eau ho\u00e1 t\u00ednh c\u1ee7a \u0111\u1ea5t sau 10 th\u00e1ng tr\u1ed3ng v\u00e0 b\u00f3n ph\u00e2n cho keo lai: \u0110\u1ea5t trong ch\u1eadu sau khi nh\u1ed5 c\u00e2y \u0111\u01b0\u1ee3c tr\u1ed9n \u0111\u1ec1u v\u00e0 l\u1ea5y m\u1eabu \u0111\u1ec3 ph\u00e2n t\u00edch c\u00e1c ch\u1ec9 ti\u00eau: pH, N t\u1ed5ng s\u1ed1, P2<\/sub>O5<\/sub> t\u1ed5ng s\u1ed1, K2<\/sub>O t\u1ed5ng s\u1ed1, ch\u1ea5t h\u1eefu c\u01a1.<\/p>\n

    2.2.3. X\u1eed l\u00fd s\u1ed1 li\u1ec7u<\/em>: C\u00e1c ch\u1ec9 ti\u00eau sinh h\u1ecdc \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch th\u1ed1ng k\u00ea theo ph\u01b0\u01a1ng ph\u00e1p LSD5%; <\/sub>so s\u00e1nh s\u1ef1 kh\u00e1c bi\u1ec7t nh\u1ecf nh\u1ea5t gi\u1eefa c\u00e1c trung b\u00ecnh \u1edf m\u1ee9c \u0111\u1ed9 5%.<\/p>\n

    3. K\u1ebft qu\u1ea3 v\u00e0 th\u1ea3o lu\u1eadn<\/h5>\n

    1. \u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n t\u1edbi sinh tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y keo lai. (B\u1ea3ng 1 v\u00e0 2; bi\u1ec3u \u0111\u1ed3 1)<\/p>\n

    Chi\u1ec1u cao c\u00e2y v\u00e0o th\u1eddi \u0111i\u1ec3m b\u00f3n ph\u00e2n c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t trong \u0111\u00f3 nghi\u1ec7m th\u1ee9c \u0111\u1ed1i ch\u1ee9ng (\u0110C) c\u00f3 chi\u1ec1u cao c\u00e2y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c: N, K, NK v\u00e0 NPK, cao h\u01a1n c\u00f3 \u00fd ngh\u0129a so v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c: NP, P v\u00e0 PK. Tuy nhi\u00ean sau 1 th\u00e1ng x\u1eed l\u00fd ph\u00e2n, chi\u1ec1u cao c\u00e2y c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c nghi\u1ec7m th\u1ee9c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau, ch\u1ee9ng t\u1ecf ph\u00e2n b\u00f3n \u0111\u00e3 b\u1eaft \u0111\u1ea7u c\u00f3 hi\u1ec7u l\u1ef1c. C\u00e0ng c\u00e1c th\u00e1ng v\u1ec1 sau s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c nghi\u1ec7m th\u1ee9c th\u00ed nghi\u1ec7m c\u00e0ng r\u00f5 r\u1ec7t. (B\u1ea3ng 1 v\u00e0 2)<\/p>\n

    V\u00e0o th\u00e1ng th\u1ee9 III, nghi\u1ec7m th\u1ee9c NPK c\u00f3 chi\u1ec1u cao c\u00e2y cao nh\u1ea5t: 82,2cm; kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a so v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c c\u00f2n l\u1ea1i: t\u1eeb 48,0 \u2013 68,6cm, t\u0103ng 35.5cm\/th\u00e1ng. K\u1ebf \u0111\u1ebfn l\u00e0 c\u00e1c nghi\u1ec7m th\u1ee9c: NP v\u00e0 N c\u00f3 chi\u1ec1u cao c\u00e2y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi P v\u00e0 PK; cao h\u01a1n h\u1eb3n so v\u1edbi K v\u00e0 NK. Hai nghi\u1ec7m th\u1ee9c n\u00e0y c\u00f3 chi\u1ec1u cao c\u00e2y th\u1ea5p nh\u1ea5t: 51.0 v\u00e0 52.4, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0110C kh\u00f4ng b\u00f3n ph\u00e2n.<\/p>\n

    B\u1ea3ng 1: Chi\u1ec1u cao c\u00e2y v\u00e0 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng 3 th\u00e1ng \u0111\u1ea7u sau khi b\u00f3n ph\u00e2n<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    C\u00f4ng th\u1ee9c<\/strong><\/td>\nTh\u00e1ng th\u1ee9<\/strong><\/p>\n

    I<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    II<\/strong><\/td>\n

    		T\u0103ng tr\u01b0\u1edfng (cm\/th\u00e1ng)<\/strong><\/td>\nTh\u00e1ng th\u1ee9 III<\/strong><\/td>\nT\u0103ng tr\u01b0\u1edfng (cm\/th\u00e1ng)<\/strong><\/td>\n<\/tr>\n
    N<\/td>\n29.4<\/td>\n42.1<\/td>\n12.7<\/td>\n63.3<\/td>\n21.2<\/td>\n<\/tr>\n
    P<\/td>\n26.0<\/td>\n44.7<\/td>\n18.6<\/td>\n60.7<\/td>\n16.0<\/td>\n<\/tr>\n
    K<\/td>\n30.0<\/td>\n43.8<\/td>\n13.7<\/td>\n51.0<\/td>\n7.3<\/td>\n<\/tr>\n
    NP<\/td>\n27.4<\/td>\n44.1<\/td>\n16.8<\/td>\n68.6<\/td>\n24.5<\/td>\n<\/tr>\n
    NK<\/td>\n28.1<\/td>\n36.7<\/td>\n8.6<\/td>\n52.4<\/td>\n15.7<\/td>\n<\/tr>\n
    PK<\/td>\n24.6<\/td>\n43.1<\/td>\n18.5<\/td>\n59.0<\/td>\n16.0<\/td>\n<\/tr>\n
    NPK<\/td>\n28.8<\/td>\n46.8<\/td>\n17.9<\/td>\n82.2<\/td>\n35.4<\/td>\n<\/tr>\n
    \u0110C<\/td>\n31.4<\/td>\n40.4<\/td>\n9.0<\/td>\n48.0<\/td>\n7.6<\/td>\n<\/tr>\n
    LSD5%<\/td>\n3.3<\/td>\n7.6 ns<\/td>\n11.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Tuy nhi\u00ean, t\u1eeb th\u00e1ng th\u1ee9 IV tr\u1edf \u0111i nghi\u1ec7m th\u1ee9c K c\u00f3 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao r\u1ea5t nhanh, trung b\u00ecnh \u0111\u1ea1t t\u1eeb 29 \u2013 30cm\/th\u00e1ng. T\u1edbi th\u00e1ng th\u1ee9 IX chi\u1ec1u cao c\u00e2y c\u1ee7a nghi\u1ec7m th\u1ee9c K t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi NPK l\u00e0 nghi\u1ec7m th\u1ee9c c\u00f3 chi\u1ec1u cao c\u00e2y cao nh\u1ea5t trong t\u1ea5t c\u1ea3 c\u00e1c th\u00e1ng theo d\u00f5i.<\/p>\n

    B\u1ea3ng 2: Chi\u1ec1u cao c\u00e2y v\u00e0 m\u1ee9c t\u0103ng tr\u01b0\u1edfng 6 th\u00e1ng cu\u1ed1i sau khi b\u00f3n ph\u00e2n<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    C\u00f4ng th\u1ee9c<\/strong><\/td>\nTh\u00e1ng th\u1ee9<\/strong><\/p>\n

    IV<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    V<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    VI<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    VII<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    VIII<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    IX<\/strong><\/td>\n

    		T\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng 6 th\u00e1ng cu\u1ed1i<\/strong><\/p>\n

    (cm \/ th\u00e1ng)<\/strong><\/td>\n<\/tr>\n

    N<\/td>\n99.2<\/td>\n112.2<\/td>\n135.9<\/td>\n162.5<\/td>\n196.2<\/td>\n217.9<\/td>\n25.8<\/td>\n<\/tr>\n
    P<\/td>\n93.5<\/td>\n106.5<\/td>\n130.5<\/td>\n165.2<\/td>\n195.9<\/td>\n212.5<\/td>\n25.3<\/td>\n<\/tr>\n
    K<\/td>\n79.5<\/td>\n102.5<\/td>\n131.5<\/td>\n172.5<\/td>\n206.9<\/td>\n224.5<\/td>\n28.9<\/td>\n<\/tr>\n
    NP<\/td>\n89.2<\/td>\n99.5<\/td>\n111.9<\/td>\n125.5<\/td>\n145.5<\/td>\n159.5<\/td>\n15.2<\/td>\n<\/tr>\n
    NK<\/td>\n66.9<\/td>\n76.5<\/td>\n92.5<\/td>\n114.5<\/td>\n139.5<\/td>\n148.9<\/td>\n16.1<\/td>\n<\/tr>\n
    PK<\/td>\n84.2<\/td>\n99.2<\/td>\n123.5<\/td>\n153.2<\/td>\n169.2<\/td>\n179.2<\/td>\n20.0<\/td>\n<\/tr>\n
    NPK<\/td>\n118.2<\/td>\n132.9<\/td>\n151.2<\/td>\n190.9<\/td>\n222.2<\/td>\n240.5<\/td>\n26.4<\/td>\n<\/tr>\n
    \u0110C<\/td>\n56.9<\/td>\n62.2<\/td>\n72.5<\/td>\n85.2<\/td>\n92.2<\/td>\n103.9<\/td>\n9.3<\/td>\n<\/tr>\n
    LSD5%<\/td>\n17.9<\/td>\n20<\/td>\n35.7<\/td>\n47.6<\/td>\n61.9<\/td>\n69.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    C\u00e1c nghi\u1ec7m th\u1ee9c N v\u00e0 P c\u00f3 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau, trung b\u00ecnh m\u1ed7i th\u00e1ng t\u0103ng t\u1eeb 25 \u2013 26cm; trong khi \u0111\u00f3 nghi\u1ec7m th\u1ee9c NP c\u00e0ng v\u1ec1 sau t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao c\u00e0ng ch\u1eadm l\u1ea1i: 15.2cm\/th\u00e1ng. T\u1eeb th\u00e1ng th\u1ee9 VII tr\u1edf \u0111i nghi\u1ec7m th\u1ee9c NP c\u00f3 chi\u1ec1u cao c\u00e2y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0110C.<\/p>\n

    Ri\u00eang nghi\u1ec7m th\u1ee9c PK, m\u1eb7c d\u00f9 v\u00e0o th\u1eddi \u0111i\u1ec3m b\u00f3n ph\u00e2n, chi\u1ec1u cao c\u00e2y th\u1ea5p nh\u1ea5t, nh\u01b0ng ngay sau khi b\u00f3n ph\u00e2n 1 th\u00e1ng chi\u1ec1u cao c\u00e2y \u0111\u00e3 t\u0103ng 18.5cm, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c NPK v\u00e0 P; 5 th\u00e1ng sau t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh t\u01b0\u01a1ng \u0111\u1ed1i kh\u00e1:\u00f8 20cm\/ th\u00e1ng. T\u1edbi th\u00e1ng th\u1ee9 IX, PK c\u00f3 chi\u1ec1u cao c\u00e2y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi NPK.<\/p>\n

    \u0110\u1ed1i v\u1edbi nghi\u1ec7m th\u1ee9c \u0110C kh\u00f4ng b\u00f3n ph\u00e2n, chi\u1ec1u cao c\u00e2y sau 9 th\u00e1ng tr\u1ed3ng ch\u1ec9 \u0111\u1ea1t 103cm, t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng trung b\u00ecnh 9cm\/ th\u00e1ng, th\u1ea5p nh\u1ea5t so v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c nghi\u1ec7m th\u1ee9c th\u00ed nghi\u1ec7m.<\/p>\n

    Bi\u1ec3u \u0111\u1ed3 1. \u0110\u1ed9ng th\u00e1i sinh tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y keo lai<\/em><\/p>\n

    2. \u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n t\u1edbi sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c c\u00e2y keo lai. (B\u1ea3ng 3 v\u00e0 bi\u1ec3u \u0111\u1ed3 2)<\/p>\n

    Do \u1edf th\u00e1ng th\u1ee9 I v\u00e0 II g\u1ed1c c\u00e2y keo lai ch\u01b0a tr\u00f2n m\u00ecnh n\u00ean kh\u00f4ng \u0111o \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c.<\/p>\n

    V\u00e0o th\u00e1ng th\u1ee9 III \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c c\u00f3 s\u1ef1 kkh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t gi\u1eefa c\u00e1c nghi\u1ec7m th\u1ee9c: Cao nh\u1ea5t l\u00e0 NPK v\u00e0 NP, kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a so v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c kh\u00e1c; k\u1ebf \u0111\u1ebfn l\u00e0 N, c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c cao h\u01a1n K nh\u01b0ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi P, NK v\u00e0 PK. Nghi\u1ec7m th\u1ee9c K c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c th\u1ea5p nh\u1ea5t trong c\u00e1c nghi\u1ec7m th\u1ee9c ph\u00e2n b\u00f3n v\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0110C.<\/p>\n

    B\u1ea3ng 3: \u0110\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng c\u1ee7a c\u00e2y keo lai (mm)<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    C\u00f4ng th\u1ee9c<\/strong><\/td>\nTh\u00e1ng th\u1ee9<\/strong><\/p>\n

    III<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    IV<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    V<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    VI<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    VII<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    VIII<\/strong><\/td>\n

    		Th\u00e1ng th\u1ee9<\/strong><\/p>\n

    IX<\/strong><\/td>\n

    		T\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng mm\/thg.<\/strong><\/td>\n<\/tr>\n
    NPK<\/td>\n12.5<\/td>\n17.0<\/td>\n18.7<\/td>\n21.7<\/td>\n25.2<\/td>\n25.9<\/td>\n26.9<\/td>\n2.4<\/td>\n<\/tr>\n
    K<\/td>\n8.4<\/td>\n10.6<\/td>\n13.6<\/td>\n16.4<\/td>\n19.2<\/td>\n22.3<\/td>\n23.6<\/td>\n2.5<\/td>\n<\/tr>\n
    PK<\/td>\n9.5<\/td>\n13.4<\/td>\n15.2<\/td>\n17.1<\/td>\n20.0<\/td>\n22.8<\/td>\n23.3<\/td>\n2.3<\/td>\n<\/tr>\n
    NP<\/td>\n12.9<\/td>\n16.0<\/td>\n16.4<\/td>\n17.9<\/td>\n19.0<\/td>\n21.2<\/td>\n23.1<\/td>\n1.7<\/td>\n<\/tr>\n
    P<\/td>\n9.5<\/td>\n12.2<\/td>\n13.8<\/td>\n15.9<\/td>\n17.4<\/td>\n19.8<\/td>\n21.0<\/td>\n1.9<\/td>\n<\/tr>\n
    NK<\/td>\n9.0<\/td>\n13.9<\/td>\n14.9<\/td>\n16.7<\/td>\n17.7<\/td>\n19.2<\/td>\n20.7<\/td>\n1.9<\/td>\n<\/tr>\n
    N<\/td>\n10.4<\/td>\n14.5<\/td>\n15.0<\/td>\n16.4<\/td>\n17.7<\/td>\n19.1<\/td>\n19.7<\/td>\n1.5<\/td>\n<\/tr>\n
    \u0110C<\/td>\n7.3<\/td>\n9.8<\/td>\n10.4<\/td>\n11.1<\/td>\n12.6<\/td>\n14.9<\/td>\n15.6<\/td>\n1.4<\/td>\n<\/tr>\n
    LSD5%<\/td>\n1.6*<\/td>\n2.6*<\/td>\n2.7*<\/td>\n2.8*<\/td>\n2.8*<\/td>\n3.6*<\/td>\n4.2*<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Cho t\u1edbi th\u00e1ng th\u1ee9 XIII, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c c\u1ee7a NPK lu\u00f4n lu\u00f4n cao nh\u1ea5t, kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a so v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c ph\u00e2n kh\u00e1c. C\u00e1c nghi\u1ec7m th\u1ee9c ph\u00e2n b\u00f3n c\u00f2n l\u1ea1i c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau cho t\u1edbi th\u00e1ng th\u1ee9 VII.<\/p>\n

    Tuy nhi\u00ean, t\u1edbi th\u00e1ng th\u1ee9 VIII, 2 nghi\u1ec7m th\u1ee9c PK v\u00e0 K c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u01b0\u1ee3t l\u00ean t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi NPK.<\/p>\n

    T\u1eeb th\u00e1ng th\u1ee9 V tr\u1edf \u0111i nghi\u1ec7m th\u1ee9c \u0110C c\u00f3 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c th\u1ea5p h\u01a1n c\u00f3 \u00fd ngh\u0129a so v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c ph\u00e2n b\u00f3n.<\/p>\n

    Nh\u00ecn l\u1ea1i t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y ta th\u1ea5y r\u1eb1ng nghi\u1ec7m th\u1ee9c K \u0111\u1ee9ng \u0111\u1ea7u b\u1ea3ng (29 cm\/th\u00e1ng). T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, \u0111\u1ed1i v\u1edbi \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c, K c\u0169ng c\u00f3 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng nhanh nh\u1ea5t (2.5 mm \/ th\u00e1ng), k\u1ebf \u0111\u00f3 l\u00e0 NPK v\u00e0 PK. C\u00e1c nghi\u1ec7m th\u1ee9c P v\u00e0 N m\u1eb7c d\u00f9 c\u00f3 t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y nhanh: 25.3 v\u00e0 25.8cm\/th\u00e1ng nh\u01b0ng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c t\u0103ng qu\u00e1 ch\u1eadm, \u0111\u1eb7c bi\u1ec7t N ch\u1ec9 t\u0103ng 1.5mm\/th\u00e1ng g\u1ea7n nh\u01b0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0110C. T\u01b0\u01a1ng quan gi\u1eefa \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 chi\u1ec1u cao c\u00e2y l\u00e0 t\u01b0\u01a1ng quan thu\u1eadn, kh\u00e1 ch\u1eb7t: r = 0,7.<\/p>\n

    Bi\u1ec3u \u0111\u1ed3 2 . \u0110\u1ed9ng th\u00e1i sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c c\u1ee7a keo lai<\/em><\/p>\n

    3. \u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n t\u1edbi sinh kh\u1ed1i v\u00e0 ch\u1ea5t kh\u00f4 c\u1ee7a keo lai (B\u1ea3ng 4 v\u00e0 bi\u1ec3u \u0111\u1ed3 3).<\/p>\n

    Trong th\u00ed nghi\u1ec7m n\u00e0y, sinh kh\u1ed1i v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ch\u1ea5t kh\u00f4 c\u00e2y keo lai gi\u1eefa c\u00e1c nghi\u1ec7m th\u1ee9c th\u00ed nghi\u1ec7m kh\u00e1c bi\u1ec7t r\u1ea5t r\u00f5 r\u00e0ng cho th\u1ea5y \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n t\u1edbi sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y keo lai l\u00e0 r\u1ea5t kh\u00e1c nhau.<\/p>\n

    B\u1ea3ng 4: \u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n t\u1edbi sinh kh\u1ed1i v\u00e0 ch\u1ea5t kh\u00f4 c\u1ee7a c\u00e2y keo lai.<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    C\u00f4ng th\u1ee9c<\/strong><\/td>\nSinh kh\u1ed1i<\/strong><\/p>\n

    (gr\/c\u00e2y)<\/strong><\/td>\n

    		% so v\u1edbi \u0110C<\/strong><\/td>\nCh\u1ea5t kh\u00f4<\/strong><\/p>\n

    (gr\/c\u00e2y)<\/strong><\/td>\n

    		% so v\u1edbi \u0110C<\/strong><\/td>\n<\/tr>\n
    NPK<\/td>\n1783.2<\/td>\n300.3<\/td>\n677.5<\/td>\n251.2<\/td>\n<\/tr>\n
    P<\/td>\n1412.2<\/td>\n237.8<\/td>\n532.7<\/td>\n197.5<\/td>\n<\/tr>\n
    PK<\/td>\n1361.9<\/td>\n229.3<\/td>\n514.5<\/td>\n190.8<\/td>\n<\/tr>\n
    K<\/td>\n1001.5<\/td>\n168.6<\/td>\n380.5<\/td>\n141.1<\/td>\n<\/tr>\n
    N<\/td>\n733.5<\/td>\n123.5<\/td>\n277.2<\/td>\n102.8<\/td>\n<\/tr>\n
    NP<\/td>\n629.2<\/td>\n105.9<\/td>\n239.2<\/td>\n88.7<\/td>\n<\/tr>\n
    NK<\/td>\n556.5<\/td>\n93.7<\/td>\n211.4<\/td>\n78.4<\/td>\n<\/tr>\n
    \u0110C<\/td>\n593.9<\/td>\n100.0<\/td>\n269.7<\/td>\n100.0<\/td>\n<\/tr>\n
    LSD5%<\/td>\n306.3*<\/td>\n–<\/td>\n118.5*<\/td>\n–<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Bi\u1ec3u \u0111\u1ed3 3. \u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n \u0111\u1ebfn sinh kh\u1ed1i c\u00e2y sau 10 th\u00e1ng tu\u1ed5i.<\/em><\/p>\n

    Nghi\u1ec7m th\u1ee9c b\u00f3n ph\u1ed1i h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 3 y\u1ebfu t\u1ed1 NPK c\u00f3 sinh kh\u1ed1i v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ch\u1ea5t kh\u00f4 cao nh\u1ea5t: 1783,2gr\/c\u00e2y, kh\u00e1c bi\u1ec7t c\u00f3 \u00fd ngh\u0129a so v\u1edbi c\u00e1c nghi\u1ec7m th\u1ee9c c\u00f2n l\u1ea1i. K\u1ebf \u0111\u1ebfn l\u00e0 2 nghi\u1ec7m th\u1ee9c P v\u00e0 PK, 2 nghi\u1ec7m th\u1ee9c n\u00e0y c\u00f3 sinh kh\u1ed1i v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau: 1412,2gr v\u00e0 1361,9 gr\/c\u00e2y, cao h\u01a1n h\u1eb3n so v\u1edbi K: 1001gr\/c\u00e2y. C\u00e1c nghi\u1ec7m th\u1ee9c ph\u00e2n b\u00f3n c\u00f2n l\u1ea1i: N, NP v\u00e0 NK c\u00f3 sinh kh\u1ed1i v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng \u0111\u1ed1i ch\u1ee9ng \u0110C, l\u00e0 nh\u1eefng nghi\u1ec7m th\u1ee9c c\u00f3 sinh kh\u1ed1i v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4 th\u1ea5p nh\u1ea5t.<\/p>\n

    Nh\u01b0 v\u1eady \u0111\u1ed1i v\u1edbi c\u00e2y keo lai, trong giai \u0111o\u1ea1n \u0111\u1ea7u m\u1edbi tr\u1ed3ng, b\u00f3n ph\u1ed1i h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 3 y\u1ebfu t\u1ed1 NPK c\u00f3 hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t t\u1edbi sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n: c\u00e2y ph\u00e1t tri\u1ec3n c\u00e2n \u0111\u1ed1i, cao, to, c\u00e0nh l\u00e1 nhi\u1ec1u. B\u00f3n N \u0111\u01a1n \u0111\u1ed9c l\u00e0m t\u0103ng chi\u1ec1u cao c\u00e2y nh\u01b0ng kh\u00f4ng l\u00e0m t\u0103ng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c c\u00e2y. Ph\u1ed1i h\u1ee3p 1 trong 2 y\u1ebfu t\u1ed1 c\u00f2n l\u1ea1i: NP ho\u1eb7c NK th\u00ec ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 hi\u1ec7u qu\u1ea3 cho vi\u1ec7c t\u00edch l\u0169y sinh kh\u1ed1i v\u00e0 ch\u1ea5t kh\u00f4. Hai nghi\u1ec7m th\u1ee9c n\u00e0y m\u1eb7c d\u00f9 l\u00e0m t\u0103ng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c nh\u01b0ng kh\u00f4ng l\u00e0m t\u0103ng chi\u1ec1u cao c\u00e2y so v\u1edbi \u0110C, d\u1eabn \u0111\u1ebfn sinh kh\u1ed1i v\u00e0 ch\u1ea5t kh\u00f4 kh\u00f4ng t\u0103ng.<\/p>\n

    So s\u00e1nh hi\u1ec7u qu\u1ea3 c\u1ee7a 2 c\u00f4ng th\u00fac ph\u00e2n P v\u00e0 K ta th\u1ea5y r\u1eb1ng nghi\u1ec7m th\u1ee9c P c\u00f3 sinh kh\u1ed1i v\u00e0 ch\u1ea5t kh\u00f4 \u0111\u1ee9ng th\u1ee9 2 trong b\u1ea3ng (Ch\u1ec9 th\u1ea5p h\u01a1n so v\u1edbi NPK): 1412.2gr\/c\u00e2y. Tuy nhi\u00ean, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 chi\u1ec1u cao c\u00e2y c\u1ee7a nghi\u1ec7m th\u1ee9c P t\u01b0\u01a1ng \u0111\u01b0\u01a1ng so v\u1edbi nghi\u1ec7m th\u1ee9c K. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 sinh kh\u1ed1i v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng kh\u00f4 gi\u1eefa 2 nghi\u1ec7m th\u1ee9c n\u00e0y l\u00e0 do t\u00e1c d\u1ee5ng c\u1ee7a 2 lo\u1ea1i ph\u00e2n kh\u00e1c nhau \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y: P th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e2n c\u00e0nh v\u00e0 ph\u00e1t tri\u1ec3n c\u00e0nh l\u00e1; trong khi K l\u00e0m t\u0103ng chi\u1ec1u cao c\u00e2y, h\u1ea1n ch\u1ebf ph\u00e1t tri\u1ec3n c\u00e0nh l\u00e1. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 g\u1eb7p trong tr\u01b0\u1eddng h\u1ee3p c\u00e2y tr\u00e0m.<\/p>\n

    B\u1ea3ng 5: T\u1ed5ng h\u1ee3p c\u00e1c ch\u1ec9 ti\u00eau sinh h\u1ecdc c\u00e2y keo lai 10 th\u00e1ng tu\u1ed5i<\/em><\/h1>\n\n\n\n\n\n\n\n\n\n\n\n\n
    C\u00f4ng th\u1ee9c<\/strong><\/td>\nSinh kh\u1ed1i<\/strong><\/p>\n

    (gr\/c\u00e2y)<\/strong><\/td>\n

    		D g\u1ed1c<\/strong><\/p>\n

    (mm)<\/strong><\/td>\n

    		H c\u00e2y<\/strong><\/p>\n

    (cm)<\/strong><\/td>\n

    		Ch\u1ea5t kh\u00f4<\/strong><\/p>\n

    (gr\/c\u00e2y)<\/strong><\/td>\n

    		%r\u1ec5<\/strong><\/p>\n

    (kh\u00f4)<\/strong><\/td>\n<\/tr>\n

    NPK<\/td>\n1783.2<\/td>\n26.9<\/td>\n240.5<\/td>\n677.5<\/td>\n23.3<\/td>\n<\/tr>\n
    P<\/td>\n1412.2<\/td>\n21.0<\/td>\n212.5<\/td>\n532.7<\/td>\n16.9<\/td>\n<\/tr>\n
    PK<\/td>\n1361.9<\/td>\n22.5<\/td>\n179.2<\/td>\n514.5<\/td>\n19.7<\/td>\n<\/tr>\n
    K<\/td>\n1001.5<\/td>\n23.6<\/td>\n224.5<\/td>\n380.5<\/td>\n23.0<\/td>\n<\/tr>\n
    N<\/td>\n733.5<\/td>\n19.7<\/td>\n217.9<\/td>\n277.2<\/td>\n16.0<\/td>\n<\/tr>\n
    NP<\/td>\n629.2<\/td>\n23.1<\/td>\n159.5<\/td>\n239.2<\/td>\n20.3<\/td>\n<\/tr>\n
    NK<\/td>\n556.5<\/td>\n20.7<\/td>\n148.9<\/td>\n211.4<\/td>\n19.2<\/td>\n<\/tr>\n
    \u0110C<\/td>\n593.9<\/td>\n15.6<\/td>\n103.9<\/td>\n269.7<\/td>\n19.1<\/td>\n<\/tr>\n
    LSD5%<\/td>\n306.3*<\/td>\n4.2*<\/td>\n69.1*<\/td>\n118.5*<\/td>\n8.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    4. \u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n t\u1edbi h\u00f3a t\u00ednh \u0111\u1ea5t sau 10 th\u00e1ng tr\u1ed3ng keo lai. (B\u1ea3ng 6)<\/p>\n

    B\u1ea3ng 6: M\u1ed9t s\u1ed1 ch\u1ec9 ti\u00eau h\u00f3a t\u00ednh \u0111\u1ea5t sau khi tr\u1ed3ng keo lai 10 th\u00e1ng<\/em><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
    CT<\/strong><\/td>\n% m\u00f9n<\/strong><\/td>\n% \u0111\u1ea1m<\/strong><\/td>\npH n\u01b0\u1edbc<\/strong><\/td>\nP2<\/sub>O5<\/sub> %<\/strong><\/td>\nK2<\/sub>O %<\/strong><\/td>\n<\/tr>\n
    \u0110C<\/td>\n2.97<\/td>\n0.21<\/td>\n4.97<\/td>\n0.09<\/td>\n0.33<\/td>\n<\/tr>\n
    P<\/td>\n2.49<\/td>\n0.20<\/td>\n4.90<\/td>\n0.12<\/td>\n0.30<\/td>\n<\/tr>\n
    K<\/td>\n2.28<\/td>\n0.18<\/td>\n5.28<\/td>\n0.10<\/td>\n0.27<\/td>\n<\/tr>\n
    N<\/td>\n2.15<\/td>\n0.17<\/td>\n5.05<\/td>\n0.08<\/td>\n0.24<\/td>\n<\/tr>\n
    NP<\/td>\n2.12<\/td>\n0.18<\/td>\n4.92<\/td>\n0.11<\/td>\n0.29<\/td>\n<\/tr>\n
    PK<\/td>\n2.12<\/td>\n0.18<\/td>\n4.87<\/td>\n0.11<\/td>\n0.29<\/td>\n<\/tr>\n
    NK<\/td>\n1.91<\/td>\n0.18<\/td>\n5.26<\/td>\n0.11<\/td>\n0.27<\/td>\n<\/tr>\n
    NPK<\/td>\n1.75<\/td>\n0.17<\/td>\n4.95<\/td>\n0.10<\/td>\n0.30<\/td>\n<\/tr>\n
    Tr\u01b0\u1edbc khi tr\u1ed3ng<\/td>\n2.32<\/td>\n0.19<\/td>\n4.90<\/td>\n0.11<\/td>\n0.26<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Th\u1eddi gian 10 th\u00e1ng c\u0169ng l\u00e0 th\u1eddi gian qu\u00e1 ng\u1eafn \u0111\u1ec3 ph\u00e2n gi\u1ea3i h\u1ebft nh\u1eefng l\u00e1 keo gi\u00e0 r\u01a1i r\u1ee5ng th\u00e0nh d\u1ea1ng m\u00f9n. V\u00ec v\u1eady, s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u1ef7 l\u1ec7 m\u00f9n trong \u0111\u1ea5t gi\u1eefa c\u00e1c nghi\u1ec7m th\u1ee9c kh\u00f4ng nhi\u1ec1u l\u1eafm. B\u1ea3ng 6 s\u1eafp theo th\u1ee9 t\u1ef1 h\u00e0m l\u01b0\u1ee3ng m\u00f9n trong \u0111\u1ea5t c\u1ee7a c\u00e1c nghi\u1ec7m th\u1ee9c th\u00ed nghi\u1ec7m t\u1eeb cao xu\u1ed1ng th\u1ea5p. \u0110\u1ee9ng \u0111\u1ea7u b\u1ea3ng l\u00e0 nghi\u1ec7m th\u1ee9c \u0111\u1ed1i ch\u1ee9ng \u0110C: 2.97%, cao h\u01a1n so v\u1edbi tr\u01b0\u1edbc khi tr\u1ed3ng: 2.32%; trong khi \u0111\u00f3 nghi\u1ec7m th\u1ee9c NPK c\u00f3 h\u00e0m l\u01b0\u1ee3ng m\u00f9n th\u1ea5p nh\u1ea5t: 1.75%, th\u1ea5p h\u01a1n so v\u1edbi tr\u01b0\u1edbc khi tr\u1ed3ng l\u00e0 0.57%. C\u00e1c nghi\u1ec7m th\u1ee9c P v\u00e0 K c\u0169ng c\u00f3 t\u1ec9 l\u1ec7 m\u00f9n trong \u0111\u1ea5t kh\u00e1 cao: 2.28 \u2013 2.49%, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi h\u00e0m l\u01b0\u1ee3ng m\u00f9n trong \u0111\u1ea5t tr\u01b0\u1edbc khi tr\u1ed3ng. C\u00e1c nghi\u1ec7m th\u1ee9c c\u00f2n l\u1ea1i: N, NP, NK, PK c\u00f3 h\u00e0m l\u01b0\u1ee3ng m\u00f9n g\u1ea7n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau, th\u1ea5p h\u01a1n so v\u1edbi h\u00e0m l\u01b0\u1ee3ng m\u00f9n tr\u01b0\u1edbc khi tr\u1ed3ng keo lai.<\/p>\n

    H\u00e0m l\u01b0\u1ee3ng \u0111\u1ea1m t\u1ed5ng s\u1ed1 (N t\u1ed5ng s\u1ed1) trong \u0111\u1ea5t dao \u0111\u1ed9ng t\u1eeb: 0.17 \u2013 0.21%, c\u00f3 t\u01b0\u01a1ng quan thu\u1eadn r\u1ea5t ch\u1eb7t v\u1edbi t\u1ef7 l\u1ec7 m\u00f9n trong \u0111\u1ea5t. H\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan r = 0.9, ngh\u0129a l\u00e0 nghi\u1ec7m th\u1ee9c n\u00e0o c\u00f3 h\u00e0m l\u01b0\u1ee3ng m\u00f9n cao th\u00ec c\u0169ng c\u00f3 h\u00e0m l\u01b0\u1ee3ng N t\u1ed5ng s\u1ed1 cao v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n

    PHH2<\/sub>0c\u1ee7a dung d\u1ecbch \u0111\u1ea5t th\u01b0\u1eddng \u00edt b\u1ecb thay \u0111\u1ed5i b\u1edfi t\u00e1c \u0111\u1ed9ng b\u00ean ngo\u00e0i do c\u00f3 \u0111\u1ed9 \u0111\u1ec7m nh\u1ea5t \u0111\u1ecbnh, t\u00f9y thu\u1ed9c v\u00e0o h\u00f3a l\u00fd t\u00ednh c\u1ee7a t\u1eebng lo\u1ea1i \u0111\u1ea5t. Trong th\u00ed nghi\u1ec7m n\u00e0y, nh\u00ecn chung pH \u0111\u1ea5t sau 10 th\u00e1ng tr\u1ed3ng keo lai c\u1ee7a c\u00e1c nghi\u1ec7m th\u1ee9c kh\u00f4ng thay \u0111\u1ed5i nhi\u1ec1u so v\u1edbi tr\u01b0\u1edbc khi tr\u1ed3ng, h\u1ea7u h\u1ebft ch\u1ec9 dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 4.9 \u2013 5.0; duy ch\u1ec9 c\u00f3 2 nghi\u1ec7m th\u1ee9c ph\u00e2n b\u00f3n K v\u00e0 NK l\u00e0 c\u00f3 \u0111\u1ed9 pH cao h\u01a1n: 5.26 \u2013 5.28.<\/p>\n

    H\u00e0m l\u01b0\u1ee3ng P2<\/sub>O5<\/sub> t\u1ed5ng s\u1ed1 dao \u0111\u1ed9ng t\u1eeb 0.09 \u2013 0.12 %, kh\u00f4ng kh\u00e1c bi\u1ec7t so v\u1edbi tr\u01b0\u1edbc khi tr\u1ed3ng: 0.11. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, h\u1ea7u h\u1ebft h\u00e0m l\u01b0\u1ee3ng K2<\/sub>O t\u1ed5ng s\u1ed1 trong \u0111\u1ea5t c\u1ee7a c\u00e1c nghi\u1ec7m th\u1ee9c dao \u0111\u1ed9ng t\u1eeb 0.27\u20130.33%, n\u1eb1m trong kho\u1ea3ng h\u00e0m l\u01b0\u1ee3ng K2<\/sub>O t\u1ed5ng s\u1ed1 c\u1ee7a \u0111\u1ea5t tr\u01b0\u1edbc khi tr\u1ed3ng: 0.26<\/p>\n

    Nh\u01b0 v\u1eady, vi\u1ec7c b\u00f3n ph\u00e2n v\u00f4 c\u01a1 cho keo lai trong giai \u0111o\u1ea1n \u0111\u1ea7u ch\u01b0a l\u00e0m thay \u0111\u1ed5i h\u00f3a t\u00ednh \u0111\u1ea5t, ngay c\u1ea3 \u1edf nghi\u1ec7m th\u1ee9c \u0110C kh\u00f4ng b\u00f3n ph\u00e2n c\u0169ng ch\u01b0a c\u00f3 g\u00ec kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3 ngo\u1ea1i tr\u1eeb h\u00e0m l\u01b0\u1ee3ng m\u00f9n trong \u0111\u1ea5t h\u01a1i cao h\u01a1n m\u1ed9t ch\u00fat.<\/p>\n

    4. K\u1ebft lu\u1eadn v\u00e0 \u0111\u1ec1 ngh\u1ecb<\/h6>\n

    1. C\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n ph\u1ed1i h\u1ee3p NPK v\u00e0 c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n \u0111\u01a1n: N, P, K r\u1ea5t c\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c l\u00e0m t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao c\u00e2y \u1edf giai \u0111o\u1ea1n n\u0103m \u0111\u1ea7u m\u1edbi tr\u1ed3ng, t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n kho\u1ea3ng 26cm\/th\u00e1ng.<\/p>\n

    2. \u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c, t\u1ea5t c\u1ea3 c\u00e1c nghi\u1ec7m th\u1ee9c ph\u00e2n b\u00f3n \u0111\u1ec1u c\u00f3 hi\u1ec7u qu\u1ea3 l\u00e0m t\u0103ng tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c so v\u1edbi \u0110C, trong \u0111\u00f3 NPK, K v\u00e0 PK l\u00e0 c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n c\u00f3 hi\u1ec7u qu\u1ea3 nh\u1ea5t v\u1edbi t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng b\u00ecnh qu\u00e2n: 2.4 \u2013 2.5mm\/th\u00e1ng.<\/p>\n

    3. \u0110\u1ed1i v\u1edbi sinh kh\u1ed1i v\u00e0 ch\u1ea5t kh\u00f4, c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n: NPK, P, PK v\u00e0 K r\u1ea5t c\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c t\u00edch l\u0169y sinh kh\u1ed1i v\u00e0 ch\u1ea5t kh\u00f4, trong \u0111\u00f3 NPK c\u00f3 hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/p>\n

    4. <\/em>Trong s\u1ed1 c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n b\u00f3n, s\u1ef1 ph\u1ed1i h\u1ee3p NPK l\u00e0 c\u00f3 hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ed1i v\u1edbi sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y keo lai; hi\u1ec7u qu\u1ea3 t\u01b0\u01a1ng t\u00e1c gi\u1eefa P v\u00e0 K (c\u00f4ng th\u1ee9c ph\u00e2n PK ) c\u0169ng r\u1ea5t cao d\u1eabn \u0111\u1ebfn c\u00e2y ph\u00e1t tri\u1ec3n c\u00e2n \u0111\u1ed1i c\u1ea3 chi\u1ec1u cao c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 sinh kh\u1ed1i. S\u1ef1 ph\u1ed1i h\u1ee3p NP v\u00e0 NK \u00edt c\u00f3 hi\u1ec7u qu\u1ea3 nh\u1ea5t trong c\u00e1c c\u00f4ng th\u1ee9c ph\u00e2n ph\u1ed1i h\u1ee3p \u0111a y\u1ebfu t\u1ed1. \u0110\u1eb7c bi\u1ec7t ph\u00e2n K khi b\u00f3n \u0111\u01a1n c\u0169ng r\u1ea5t c\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao v\u00e0 \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c c\u00e2y keo lai.<\/em><\/p>\n

    5. V\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a vi\u1ec7c b\u00f3n ph\u00e2n v\u00f4 c\u01a1 cho keo lai t\u1edbi ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea5t trong giai \u0111o\u1ea1n n\u0103m \u0111\u1ea7u m\u1edbi tr\u1ed3ng, th\u1eddi gian qu\u00e1 ng\u1eafn, ch\u01b0a th\u1ec3 hi\u1ec7n kh\u00e1c bi\u1ec7t r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Th\u0103m dò ph\u1ea3n \u1ee9ng c\u1ee7a keo lai giai \u0111o\u1ea1n m\u1edbi tr\u1ed3ng v\u1edbi phân khoáng N (Urea), K (Kali clorua ) và P (Super lân) bón \u0111\u01a1n và ph\u1ed1i h\u1ee3p trên n\u1ec1n \u0111\u1ea5t r\u1eebng Tân L\u1eadp, Bình Ph\u01b0\u1edbc. 1. M\u1ee5c tiêu thí nghi\u1ec7m – So sánh hi\u1ec7u qu\u1ea3 c\u1ee7a các công th\u1ee9c phân khoáng, bón \u0111\u01a1n ho\u1eb7c ph\u1ed1i h\u1ee3p t\u1edbi sinh tr\u01b0\u1edfng c\u1ee7a keo lai. – Xác \u0111\u1ecbnh lo\u1ea1i phân và công th\u1ee9c phân thích h\u1ee3p \u0111\u1ed1i v\u1edbi sinh tr\u01b0\u1edfng c\u1ee7a keo lai giai \u0111o\u1ea1n m\u1edbi tr\u1ed3ng. 2. V\u1eadt li\u1ec7u và ph\u01b0\u01a1ng pháp nghiên c\u1ee9u. 2.1. V\u1eadt li\u1ec7u và qui cách: Thí nghi\u1ec7m th\u1ef1c hi\u1ec7n trong ch\u1eadu – Ch\u1eadu thí nghi\u1ec7m: ch\u1eadu sành có dung tích 25dm3. – \u0110\u1ea5t tr\u1ed3ng: l\u1edbp \u0111\u1ea5t m\u1eb7t 30cm t\u1ea1i Tân L\u1eadp, \u0111\u1ea5t \u0111\u01b0\u1ee3c tr\u1ed9n \u0111\u1ec1u, nh\u1eb7t h\u1ebft r\u1ec5 cây, c\u1ecf d\u1ea1i, \u0111\u1ed5 \u0111\u1ea7y t\u1edbi mi\u1ec7ng m\u1ed7i ch\u1eadu và sau 1 tu\u1ea7n, \u0111\u1ed5 thêm \u0111\u1ea5t cho \u0111\u1ea7y ch\u1eadu. – K\u1ebft qu\u1ea3 phân tích \u0111\u1ea5t nh\u01b0 sau: <\/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\/8736"}],"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=8736"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8736\/revisions"}],"predecessor-version":[{"id":19095,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8736\/revisions\/19095"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}