{"id":3760,"date":"2017-09-13T08:37:24","date_gmt":"2017-09-13T01:37:24","guid":{"rendered":"http:\/\/wasi.org.vn\/?p=3760"},"modified":"2017-09-13T08:48:45","modified_gmt":"2017-09-13T01:48:45","slug":"gioi-thieu-ket-qua-nghien-cuu-ve-phan-bon-n-va-k-cho-ca-cao-o-viet-nam","status":"publish","type":"post","link":"https:\/\/wasi.org.vn\/en\/gioi-thieu-ket-qua-nghien-cuu-ve-phan-bon-n-va-k-cho-ca-cao-o-viet-nam\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 ph\u00e2n b\u00f3n N v\u00e0 K cho Ca cao \u1edf Vi\u1ec7t Nam"},"content":{"rendered":"<p style=\"text-align: right;\"><strong><span style=\"font-family: times new roman,times,serif;\"><em> Tr\u01b0\u01a1ng H\u1ed3ng<\/em><\/span><\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 b\u00f3n ph\u00e2n \u0111\u1ea1m v\u00e0 kali cho ca cao th\u1eddi k\u1ef3 kinh doanh t\u1ea1i v\u00f9ng T\u00e2y Nguy\u00ean, \u0110\u00f4ng Nam B\u1ed9 v\u00e0 T\u00e2y Nam B\u1ed9 t\u1eeb 2011 <em>&#8211;<\/em> 2015 cho th\u1ea5y r\u1eb1ng:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 T\u1ea1i T\u00e2y Nguy\u00ean, tr\u00ean n\u1ec1n c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1 10 kg (ph\u00e2n chu\u1ed3ng\/g\u1ed1c, 2 n\u0103m b\u00f3n 1 l\u1ea7n), n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t \u1edf m\u1ee9c b\u00f3n \u0111\u1ea1m 180g N\/g\u1ed1c (\u0111\u1ea1t 1,10 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t b\u00f3n 90g N\/g\u1ed1c (0,82 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Tr\u00ean n\u1ec1n kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1, n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t \u1edf m\u1ee9c b\u00f3n \u0111\u1ea1m 180g N\/g\u1ed1c (0,88 t\u1ea5n h\u1ea1t kh\u00f4\/ha), sau \u0111\u00f3 \u0111\u1ebfn m\u1ee9c b\u00f3n \u0111\u1ea1m 270g N\/g\u1ed1c (0,86 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 \u1edf m\u1ee9c b\u00f3n \u0111\u1ea1m 90g N (0,65 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Nh\u01b0 v\u1eady t\u1eeb k\u1ebft qu\u1ea3 tr\u00ean, b\u01b0\u1edbc \u0111\u1ea7u cho th\u1ea5y b\u00f3n \u0111\u1ea1m \u1edf m\u1ee9c 180g N\/g\u1ed1c tr\u00ean n\u1ec1n 82g P<sub>2<\/sub>O<sub>5<\/sub> v\u00e0 180g K<sub>2<\/sub>O\/g\u1ed1c k\u1ebft h\u1ee3p v\u1edbi b\u00f3n ph\u00e2n h\u1eefu c\u01a1 \u0111\u00e3 g\u00f3p ph\u1ea7n gi\u00fap cho ca cao \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 Nghi\u00ean c\u1ee9u h\u00e0m t\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u1ee3ng \u0111\u1ea1m v\u00e0 n\u0103ng su\u1ea5t ca cao cho th\u1ea5y r\u1eb1ng \u0111\u01b0\u1eddng cong ph\u1ea3n \u1ee9ng c\u1ee7a ph\u00e2n \u0111\u1ea1m theo d\u1ea1ng h\u00e0m b\u1eadc 2: Y = -ax<sup>2<\/sup> + bx + c, h\u00e0m n\u00e0y c\u00f3 1 gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i. K\u1ebft qu\u1ea3 t\u00ednh to\u00e1n \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng ph\u00e2n \u0111\u1ea1m b\u00f3n cho ca cao t\u1ea1i \u0110\u0103k L\u0103k \u0111\u1ec3 \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t l\u00e0 200 g N\/g\u1ed1c.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 \u0110\u1ed1i v\u1edbi kali, n\u0103ng su\u1ea5t ca cao trung b\u00ecnh tr\u00ean n\u1ec1n kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1 cao nh\u1ea5t l\u00e0 m\u1ee9c b\u00f3n kali 270g K<sub>2<\/sub>O\/g\u1ed1c (0,87 t\u1ea5n h\u1ea1t kh\u00f4\/ha), sau \u0111\u00f3 \u0111\u1ebfn m\u1ee9c b\u00f3n 180g K<sub>2<\/sub>O\/g\u1ed1c (0,83 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 m\u1ee9c b\u00f3n 90g K<sub>2<\/sub>O\/g\u1ed1c (0,7 t\u1ea5n h\u1ea1t kh\u00f4\/ha). T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady x\u00e9t \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ee9c b\u00f3n kali l\u00ean n\u0103ng su\u1ea5t ca cao tr\u00ean n\u1ec1n c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1, th\u00ec n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t \u1edf m\u1ee9c b\u00f3n 180g K<sub>2<\/sub>O\/g\u1ed1c (1,07 t\u1ea5n h\u1ea1t kh\u00f4\/ha), sau \u0111\u00f3 \u0111\u1ebfn m\u1ee9c 270g K<sub>2<\/sub>O\/g\u1ed1c (1,03 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 \u1edf m\u1ee9c b\u00f3n 90g K<sub>2<\/sub>O\/g\u1ed1c (0,86 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Nh\u01b0 v\u1eady, trong \u0111i\u1ec1u ki\u1ec7n th\u00ed nghi\u1ec7m, m\u1ee9c b\u00f3n 180g K<sub>2<\/sub>O\/g\u1ed1c k\u1ebft h\u1ee3p v\u1edbi b\u00f3n ph\u00e2n h\u1eefu c\u01a1 \u0111\u00e3 g\u00f3p ph\u1ea7n cho n\u0103ng su\u1ea5t cao nh\u1ea5t.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 T\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u1ee3ng kali v\u00e0 n\u0103ng su\u1ea5t ca cao theo d\u1ea1ng h\u00e0m b\u1eadc 2: Y = -ax<sup>2<\/sup> + bx + c, h\u00e0m n\u00e0y c\u00f3 1 gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i. K\u1ebft qu\u1ea3 t\u00ednh to\u00e1n \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng ph\u00e2n kali b\u00f3n cho ca cao v\u00f9ng T\u00e2y Nguy\u00ean \u0111\u1ec3 \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t l\u00e0 205 g K<sub>2<\/sub>O\/g\u1ed1c.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 &#8211; T\u1ea1i \u0110\u00f4ng Nam B\u1ed9, k\u00ea\u0301t qua\u0309 sau 4 n\u0103m cho th\u1ea5y n\u0103ng su\u1ea5t trung b\u00ecnh c\u1ee7a c\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n h\u00f3a h\u1ecdc tr\u00ean n\u1ec1n h\u1eefu c\u01a1 (\u0111\u1ea1t 1,14 t\u1ea5n h\u1ea1t kh\u00f4\/ha) cao h\u01a1n c\u00e1c c\u00f4ng th\u1ee9c kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1 (1,07 t\u1ea5n h\u1ea1t kh\u00f4\/ha), tuy nhi\u00ean sai kh\u00e1c l\u00e0 kh\u00f4ng c\u00f3 \u00fd ngh\u0129a. C\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t \u00fd ngh\u0129a gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c b\u00f3n N, P, K tr\u00ean c\u1ea3 2 n\u1ec1n c\u00f3 v\u00e0 kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1. Trong c\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n h\u00f3a h\u1ecdc N, P, K; c\u00f4ng th\u1ee9c 5 (180g N &#8211; 82g P<sub>2<\/sub>O<sub>5 <\/sub>&#8211; 180g K<sub>2<\/sub>O)\/g\u1ed1c v\u00e0 c\u00f4ng th\u1ee9c 6 (180g N &#8211; 82g P<sub>2<\/sub>O<sub>5 <\/sub>&#8211; 270g K<sub>2<\/sub>O)\/g\u1ed1c tr\u00ean n\u1ec1n h\u1eefu c\u01a1 c\u00f3 n\u0103ng su\u1ea5t \u0111\u1ea1t cao nh\u1ea5t 1,33 &#8211; 1,36 t\u1ea5n h\u1ea1t kh\u00f4\/ha. C\u00f4ng th\u1ee9c b\u00f3n l\u01b0\u1ee3ng ph\u00e2n th\u1ea5p (90g N &#8211; 82g P<sub>2<\/sub>O<sub>5 <\/sub>&#8211; 90g K<sub>2<\/sub>O)\/g\u1ed1c n\u0103ng su\u1ea5t h\u1ea1t kh\u00f4 thu \u0111\u01b0\u1ee3c th\u1ea5p nh\u1ea5t ch\u1ec9 \u0111\u1ea1t 0,89 t\u1ea5n h\u1ea1t kh\u00f4\/ha.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 Nghi\u00ean c\u1ee9u v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u00e1c m\u1ee9c \u0111\u1ea1m tr\u00ean n\u1ec1n c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1 cho th\u1ea5y r\u1eb1ng n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t khi b\u00f3n 180g N\/g\u1ed1c (1,30 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 \u1edf m\u1ee9c 90g N\/g\u1ed1c (0,96 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Tr\u00ean n\u1ec1n kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1, n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t c\u0169ng \u1edf m\u1ee9c b\u00f3n \u0111\u1ea1m 180g N\/g\u1ed1c (1,15 t\u1ea5n h\u1ea1t kh\u00f4\/ha), sau \u0111\u00f3 \u0111\u1ebfn m\u1ee9c b\u00f3n \u0111\u1ea1m 270g N\/g\u1ed1c (1,07 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 \u1edf m\u1ee9c b\u00f3n \u0111\u1ea1m 90g N (0,99 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Nh\u01b0 v\u1eady b\u00f3n 180g N\/g\u1ed1c tr\u00ean n\u1ec1n 82g P<sub>2<\/sub>O<sub>5<\/sub> v\u00e0 180g K<sub>2<\/sub>O\/g\u1ed1c, k\u1ebft h\u1ee3p v\u1edbi b\u00f3n ph\u00e2n h\u1eefu c\u01a1 \u0111\u00e3 g\u00f3p ph\u1ea7n gi\u00fap cho \u00a0ca cao \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 T\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u1ee3ng \u0111\u1ea1m v\u00e0 n\u0103ng su\u1ea5t ca cao t\u1ea1i v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 theo d\u1ea1ng h\u00e0m b\u1eadc 2. K\u1ebft qu\u1ea3 t\u00ednh to\u00e1n \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng ph\u00e2n \u0111\u1ea1m b\u00f3n cho ca cao \u0111\u1ec3 \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t l\u00e0 193 g N\/g\u1ed1c.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 \u0110\u1ed1i v\u1edbi kali, tr\u00ean n\u1ec1n kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1, n\u0103ng su\u1ea5t trung b\u00ecnh gi\u1eefa 3 m\u1ee9c b\u00f3n kali l\u00e0 kh\u00e1c nhau (t\u1eeb 1,01 &#8211; 1,11 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Nh\u01b0ng khi x\u00e9t \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ee9c b\u00f3n kali l\u00ean n\u0103ng su\u1ea5t ca cao tr\u00ean n\u1ec1n c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1, th\u00ec n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t khi b\u00f3n 180g K<sub>2<\/sub>O\/g\u1ed1c (\u0111\u1ea1t 1,18 t\u1ea5n h\u1ea1t kh\u00f4\/ha), sau \u0111\u00f3 \u0111\u1ebfn m\u1ee9c 270 g K<sub>2<\/sub>O\/g\u1ed1c v\u00e0 90g K<sub>2<\/sub>O\/g\u1ed1c (1,12 &#8211; 1,10 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Nh\u01b0 v\u1eady b\u00f3n 180 g K<sub>2<\/sub>O\/g\u1ed1c k\u1ebft h\u1ee3p v\u1edbi b\u00f3n ph\u00e2n h\u1eefu c\u01a1 \u0111\u00e3 g\u00f3p ph\u1ea7n gi\u00fap cho ca cao \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 T\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u1ee3ng kali v\u00e0 n\u0103ng su\u1ea5t ca cao cho th\u1ea5y r\u1eb1ng \u0111\u01b0\u1eddng cong ph\u1ea3n \u1ee9ng c\u1ee7a ph\u00e2n kali theo d\u1ea1ng h\u00e0m b\u1eadc 2. K\u1ebft qu\u1ea3 t\u00ednh to\u00e1n \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u00a0l\u01b0\u1ee3ng ph\u00e2n kali b\u00f3n cho ca cao t\u1ea1i \u0110\u00f4ng Nam B\u1ed9 \u0111\u1ec3 \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t l\u00e0 200 g K<sub>2<\/sub>O\/g\u1ed1c<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 &#8211; T\u1ea1i v\u00f9ng T\u00e2y Nam B\u1ed9 n\u0103ng su\u1ea5t ca cao c\u00f3 xu h\u01b0\u1edbng t\u0103ng d\u1ea7n theo m\u1ee9c \u0111\u1ea1m b\u00f3n v\u00e0o. Gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n h\u00f3a h\u1ecdc tr\u00ean n\u1ec1n c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1 trung b\u00ecnh n\u0103ng su\u1ea5t \u0111\u1ea1t 1,47 t\u1ea5n\/ha cao h\u01a1n so v\u1edbi tr\u00ean n\u1ec1n kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1 (1,37 t\u1ea5n), tuy nhi\u00ean sai kh\u00e1c n\u00e0y l\u00e0 kh\u00f4ng c\u00f3 \u00fd ngh\u0129a. C\u00f4ng th\u1ee9c 9 (270g N &#8211; 82g P<sub>2<\/sub>O<sub>5 <\/sub>&#8211; 270g K<sub>2<\/sub>O)\/g\u1ed1c v\u00e0 c\u00f4ng th\u1ee9c 8 (270g N &#8211; 82g P<sub>2<\/sub>O<sub>5 <\/sub>&#8211; 180g K<sub>2<\/sub>O)\/g\u1ed1c c\u00f3 n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t l\u00e0 1,85 &#8211; 1,87 t\u1ea5n\/ha, n\u0103ng su\u1ea5t th\u1ea5p nh\u1ea5t l\u00e0 c\u00f4ng th\u1ee9c b\u00f3n m\u1ee9c ph\u00e2n (90g N &#8211; 82g P<sub>2<\/sub>O<sub>5 <\/sub>&#8211; 90g K<sub>2<\/sub>O)\/g\u1ed1c ch\u1ec9 \u0111\u1ea1t 0,83 t\u1ea5n\/ha v\u00e0 c\u00f4ng th\u1ee9c 2 (90g N &#8211; 82g P<sub>2<\/sub>O<sub>5 <\/sub>&#8211; 180g K<sub>2<\/sub>O)\/g\u1ed1c n\u0103ng su\u1ea5t thu \u0111\u01b0\u1ee3c ch\u1ec9 1,02 t\u1ea5n\/ha.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n \u0111\u1ea1m \u0111\u1ed1i v\u1edbi n\u0103ng su\u1ea5t ca cao t\u1ea1i T\u00e2y Nam B\u1ed9 cho th\u1ea5y tr\u00ean n\u1ec1n b\u00f3n ph\u00e2n h\u1eefu c\u01a1, n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t \u1edf m\u1ee9c b\u00f3n 270g N\/g\u1ed1c (\u0111\u1ea1t 1,59 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 \u1edf m\u1ee9c 90 g N\/g\u1ed1c (1,34 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Tr\u00ean n\u1ec1n kh\u00f4ng c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1, n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t c\u0169ng \u1edf m\u1ee9c b\u00f3n \u0111\u1ea1m 270g N\/g\u1ed1c (1,51 t\u1ea5n h\u1ea1t kh\u00f4\/ha), sau \u0111\u00f3 \u0111\u1ebfn m\u1ee9c 180g N\/g\u1ed1c (1,39 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 \u1edf m\u1ee9c 90g N\/g\u1ed1c (1,24 t\u1ea5n h\u1ea1t kh\u00f4\/ha). Nh\u01b0 v\u1eady, trong \u0111i\u1ec1u ki\u1ec7n th\u00ed nghi\u1ec7m t\u1ea1i T\u00e2y Nam B\u1ed9 b\u00f3n 270g N tr\u00ean n\u1ec1n 82g P<sub>2<\/sub>O<sub>5 <\/sub>v\u00e0 270g K<sub>2<\/sub>O\/g\u1ed1c, k\u1ebft h\u1ee3p v\u1edbi b\u00f3n ph\u00e2n h\u1eefu c\u01a1 cho n\u0103ng su\u1ea5t cao nh\u1ea5t.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 T\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u1ee3ng \u0111\u1ea1m v\u00e0 n\u0103ng su\u1ea5t ca cao t\u1ea1i T\u00e2y Nam B\u1ed9 theo d\u1ea1ng h\u00e0m\u00a0\u00a0 Y = ax + b. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u0103ng su\u1ea5t ca cao c\u00f2n t\u0103ng khi b\u00f3n \u0111\u1ea1m \u1edf m\u1ee9c\u00a0 cao h\u01a1n.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 Nh\u01b0 v\u1eady, trong \u0111i\u1ec1u ki\u1ec7n th\u00ed nghi\u1ec7m \u0111\u1ed1i v\u1edbi v\u00f9ng T\u00e2y Nam B\u1ed9, c\u00f3 th\u1ec3 ch\u1ecdn m\u1ee9c N = 270g\/g\u1ed1c b\u00f3n cho ca cao \u0111\u1ec3 \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0 X\u00e9t \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ee9c b\u00f3n kali l\u00ean n\u0103ng su\u1ea5t ca cao tr\u00ean n\u1ec1n c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1, th\u00ec n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t \u1edf m\u1ee9c b\u00f3n 270g K<sub>2<\/sub>O\/g\u1ed1c (\u0111\u1ea1t 1,59 t\u1ea5n h\u1ea1t kh\u00f4\/ha), sau \u0111\u00f3 \u0111\u1ebfn m\u1ee9c b\u00f3n 180g K<sub>2<\/sub>O\/g\u1ed1c (1,48 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t l\u00e0 \u1edf m\u1ee9c b\u00f3n 90g K<sub>2<\/sub>O\/g\u1ed1c (1,34 t\u1ea5n h\u1ea1t kh\u00f4\/ha). T\u01b0\u01a1ng t\u1ef1 tr\u00ean n\u1ec1n kh\u00f4ng b\u00f3n ph\u00e2n h\u1eefu c\u01a1 m\u1ee9c b\u00f3n 270g K<sub>2<\/sub>O cho n\u0103ng su\u1ea5t cao nh\u1ea5t (1,51 t\u1ea5n h\u1ea1t kh\u00f4\/ha) ti\u1ebfp \u0111\u1ebfn l\u00e0 m\u1ee9c b\u00f3n 180g K<sub>2<\/sub>O (1,37 t\u1ea5n h\u1ea1t kh\u00f4\/ha) v\u00e0 th\u1ea5p nh\u1ea5t \u1edf m\u1ee9c b\u00f3n 90g K<sub>2<\/sub>O\/g\u1ed1c (1,24 t\u1ea5n h\u1ea1t kh\u00f4\/ha). K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y b\u00f3n kali 270g K<sub>2<\/sub>O tr\u00ean n\u1ec1n 270g N v\u00e0 80g P<sub>2<\/sub>O<sub>5\/ <\/sub>g\u1ed1c k\u1ebft h\u1ee3p v\u1edbi b\u00f3n ph\u00e2n h\u1eefu c\u01a1 th\u00ec n\u0103ng su\u1ea5t ca cao \u0111\u1ea1t cao nh\u1ea5t.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: times new roman,times,serif;\">\u00a0\u00a0\u00a0\u00a0\u00a0 T\u01b0\u01a1ng quan gi\u1eefa l\u01b0\u1ee3ng kali v\u00e0 n\u0103ng su\u1ea5t ca cao t\u1ea1i T\u00e2y Nam B\u1ed9 theo d\u1ea1ng h\u00e0m Y = ax + b. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u0103ng su\u1ea5t ca cao c\u00f2n t\u0103ng khi b\u00f3n kali \u1edf m\u1ee9c cao h\u01a1n. Nh\u01b0 v\u1eady, trong \u0111i\u1ec1u ki\u1ec7n th\u00ed nghi\u1ec7m \u0111\u1ed1i v\u1edbi v\u00f9ng B\u1ebfn Tre, c\u00f3 th\u1ec3 ch\u1ecdn m\u1ee9c K<sub>2<\/sub>O = 270g\/g\u1ed1c b\u00f3n cho ca cao \u0111\u1ec3 \u0111\u1ea1t n\u0103ng su\u1ea5t cao nh\u1ea5t.<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tr\u01b0\u01a1ng H\u1ed3ng \u00a0\u00a0\u00a0\u00a0 K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 b\u00f3n ph\u00e2n \u0111\u1ea1m v\u00e0 kali cho ca cao th\u1eddi k\u1ef3 kinh doanh t\u1ea1i v\u00f9ng T\u00e2y Nguy\u00ean, \u0110\u00f4ng Nam B\u1ed9 v\u00e0 T\u00e2y Nam B\u1ed9 t\u1eeb 2011 &#8211; 2015 cho th\u1ea5y r\u1eb1ng: \u00a0\u00a0\u00a0\u00a0 T\u1ea1i T\u00e2y Nguy\u00ean, tr\u00ean n\u1ec1n c\u00f3 b\u00f3n ph\u00e2n h\u1eefu c\u01a1 10 kg (ph\u00e2n chu\u1ed3ng\/g\u1ed1c, 2 n\u0103m b\u00f3n 1 l\u1ea7n), n\u0103ng su\u1ea5t trung b\u00ecnh cao nh\u1ea5t \u1edf m\u1ee9c b\u00f3n \u0111\u1ea1m 180g N\/g\u1ed1c&#8230;<\/p>\n","protected":false},"author":1,"featured_media":3761,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,34],"tags":[],"class_list":["post-3760","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ket-qua-nguyen-cuu","category-thong-tin-khoa-hoc-cong-nghe"],"_links":{"self":[{"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/posts\/3760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/comments?post=3760"}],"version-history":[{"count":0,"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/posts\/3760\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/media\/3761"}],"wp:attachment":[{"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/media?parent=3760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/categories?post=3760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wasi.org.vn\/en\/wp-json\/wp\/v2\/tags?post=3760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}