C\u00f3 hai lo\u1ea1i h\u1ea1t gi\u1ed1ng 1 v\u00e0 2, c\u1ea7n t\u00ecm hi\u1ec3u xem lo\u1ea1i h\u1ea1t gi\u1ed1ng n\u00e0o cho s\u1ea3n l\u01b0\u1ee3ng cao ng\u01b0\u1eddi ta ph\u1ea3i ti\u1ebfn h\u00e0nh c\u00e1c th\u00ed nghi\u1ec7m. N\u1ebfu \u0111em h\u1ea1t gi\u1ed1ng 1 gieo v\u00e0o m\u1ea3nh \u0111\u1ea5t A c\u00f2n h\u1ea1t gi\u1ed1ng 2 gieo v\u00e0o m\u1ea3nh \u0111\u1ea5t B. K\u1ebft qu\u1ea3 thu ho\u1ea1ch c\u00f3 th\u1ec3 cho bi\u1ebft lo\u1ea1i h\u1ea1t gi\u1ed1ng n\u00e0o cho s\u1ea3n l\u01b0\u1ee3ng cao v\u00e0 d\u1ef1a v\u00e0o \u0111\u00f3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng cao, \u1eaft c\u00f3 ng\u01b0\u1eddi n\u00f3i \u0111\u00f3 l\u00e0 m\u1ea3nh \u0111\u1ea5t A ph\u00ec nhi\u00eau h\u01a1n, t\u1ed1t h\u01a1n m\u1ea3nh \u0111\u1ea5t B. T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 c\u00e1ch th\u00ed nghi\u1ec7m nh\u01b0 v\u1eeba m\u00f4 t\u1ea3 kh\u00f4ng c\u00f3 hi\u1ec7u qu\u1ea3 mong mu\u1ed1n.<\/p>\n\n\n\n
Ch\u1ec9 c\u1ea7n thay \u0111\u1ed5i ph\u01b0\u01a1ng \u00e1n th\u00ed nghi\u1ec7m m\u1ed9t ch\u00fat: Tr\u00ean c\u00e1c m\u1ea3nh \u0111\u1ea5t A v\u00e0 B ta \u0111\u1ec1u chia th\u00e0nh hai n\u1eeda: m\u1ed9t n\u1eeda gieo tr\u1ed3ng h\u1ea1t gi\u1ed1ng 1, m\u1ed9t n\u1eeda gieo tr\u1ed3ng h\u1ea1t gi\u1ed1ng 2. K\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m s\u1ebd kh\u00f4ng l\u00e0m ch\u00fang ta th\u1ea5t v\u1ecdng.<\/p>\n\n\n\n
D\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m (nh\u01b0 \u1edf h\u00ecnh b\u00ean d\u01b0\u1edbi) ta kh\u00f4ng ch\u1ec9 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c h\u1ea1t gi\u1ed1ng 2 cho s\u1ea3n l\u01b0\u1ee3ng cao h\u01a1n h\u1ea1t gi\u1ed1ng 1, m\u00e0 c\u00f2n cho bi\u1ebft l\u00e0 m\u1ea3nh \u0111\u1ea5t B ph\u00f9 h\u1ee3p v\u1edbi s\u1ef1 sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y h\u01a1n m\u1ea3nh \u0111\u1ea5t A.<\/p>\n\n\n\n
T\u1eeb c\u00e1c k\u1ebft qu\u1ea3 cho th\u1ea5y: c\u00e1ch b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m t\u1ed1t th\u00ec cho d\u00f9 s\u1ed1 l\u1ea7n th\u00ed nghi\u1ec7m kh\u00f4ng nhi\u1ec1u c\u0169ng c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 v\u1eeba \u00fd.<\/p>\n\n\n\n
Nh\u01b0ng n\u1ebfu b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m kh\u00f4ng t\u1ed1t, cho d\u00f9 c\u00f3 ti\u1ebfn h\u00e0nh nhi\u1ec1u th\u00ed nghi\u1ec7m th\u00ec k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m s\u1ebd kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/p>\n\n\n\n
Ph\u01b0\u01a1ng ph\u00e1p th\u00ed nghi\u1ec7m ch\u00e9o l\u00e0 m\u1ed9t c\u00e1ch b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m cho ph\u00e9p ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c th\u1eddi gian, ti\u1ec1n c\u1ee7a m\u00e0 k\u1ebft qu\u1ea3 l\u1ea1i \u0111\u1ea1t hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n
V\u00ed d\u1ee5 c\u1ea7n nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ba y\u1ebfu t\u1ed1 tu\u1ed5i m\u1ea1, s\u1ed1 l\u01b0\u1ee3ng d\u1ea3nh m\u1ea1 v\u00e0 ph\u00e2n b\u00f3n \u0111\u1ed1i v\u1edbi c\u00e2y l\u00faa n\u01b0\u1edbc. Ta c\u00f3 th\u1ec3 ch\u1ecdn hai m\u1ee9c: v\u1ec1 tu\u1ed5i m\u1ea1 chia th\u00e0nh hai m\u1ee9c non, tr\u01b0\u1edfng th\u00e0nh, v\u1ec1 s\u1ed1 d\u1ea3nh m\u1ea1 chia l\u00e0m 150.000\/ha v\u00e0 250.000\/ha; ph\u00e2n b\u00f3n 4 t\u1ea5n\/m\u1eabu v\u00e0 6 t\u1ea5n\/m\u1eabu.<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi ba y\u1ebfu t\u1ed1 n\u00e0y k\u1ebft h\u1ee3p v\u1edbi hai m\u1ee9c theo c\u00e1ch l\u00e0m nh\u01b0 tr\u00ean ta c\u00f3 23 = 8 c\u00e1ch ph\u1ed1i h\u1ee3p. C\u00f3 c\u00e1ch n\u00e0o ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c s\u1ee9c l\u1ef1c h\u01a1n kh\u00f4ng? C\u1ea7n xem x\u00e9t c\u00e1ch th\u00ed nghi\u1ec7m ch\u00e9o ta c\u00f3 th\u1ec3 ch\u1ec9 c\u1ea7n l\u00e0m b\u1ed1n th\u00ed nghi\u1ec7m l\u00e0 c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c \u0111\u00edch. Ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c hi\u1ec7n v\u00e0 k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c tr\u00ecnh trong b\u1ea3ng sau:<\/p>\n\n\n\n
Ta th\u1eed xem x\u00e9t hai l\u1ea7n th\u00ed nghi\u1ec7m v\u1edbi hai m\u1ee9c th\u00ed nghi\u1ec7m, ta th\u1ea5y \u0111\u01b0\u1ee3c 595 kg c\u00f2n v\u1edbi m\u1ea1 tr\u01b0\u1edfng th\u00e0nh \u0111\u01b0\u1ee3c 720 kg. Trong \u0111\u00f3 bao g\u1ed3m c\u1ea3 s\u1ed1 d\u1ea3nh m\u1ea1 v\u00e0 ph\u00e2n \u0111\u1ea1m.<\/p>\n\n\n\n
T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ea5y v\u1edbi m\u1ea1 tr\u01b0\u1edfng th\u00e0nh cao h\u01a1n m\u1ea1 non 125 kg.<\/p>\n\n\n\n
T\u01b0\u01a1ng t\u1ef1 khi x\u00e9t \u1ea3nh h\u01b0\u1edfng s\u1ed1 d\u1ea3nh m\u1ea1 l\u00e0 (295 + 375) – (3000 + 345) = 25 kg. T\u1eeb \u0111\u00f3 cho th\u1ea5y v\u1edbi s\u1ed1 d\u1ea3nh m\u1ea1 150.000\/m\u1eabu cao h\u01a1n 250.000\/ha. C\u00f2n v\u1edbi ph\u00e2n \u0111\u1ea1m th\u00ec m\u1ee9c 600 kg\/ha cao h\u01a1n 800 kg\/ha (300 + 375) – (295 + 345) = 35 kg.<\/p>\n\n\n\n
T\u1eeb c\u00e1c k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y s\u1eed d\u1ee5ng c\u00e1c ch\u1ebf \u0111\u1ed9 canh t\u00e1c: m\u1ea1 tr\u01b0\u1edfng th\u00e0nh, s\u1ed1 d\u1ea3nh m\u1ea1 150.000\/m\u1eabu, ph\u00e2n \u0111\u1ea1m 600 kg\/m\u1eabu cho s\u1ea3n l\u01b0\u1ee3ng cao nh\u1ea5t. T\u1eeb k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 \u0111i \u0111\u1ebfn k\u1ebft lu\u1eadn: Nh\u00e2n t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ea3n l\u01b0\u1ee3ng ch\u1ee7 y\u1ebfu l\u00e0 tu\u1ed5i m\u1ea1, ti\u1ebfp \u0111\u1ebfn l\u00e0 l\u01b0\u1ee3ng ph\u00e2n b\u00f3n, th\u1ee9 ba m\u1edbi \u0111\u1ebfn s\u1ed1 d\u1ea3nh m\u1ea1.<\/p>\n\n\n\n
D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p th\u00ed nghi\u1ec7m ch\u00e9o c\u00f3 th\u1ec3 gi\u1ea3m s\u1ed1 l\u1ea7n th\u00ed nghi\u1ec7m, l\u1ea1i c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 d\u1ef1 \u0111\u1ecbnh. N\u1ebfu s\u1ed1 nh\u00e2n t\u1ed1 v\u00e0 m\u1ee9c th\u00ed nghi\u1ec7m c\u00e0ng nhi\u1ec1u th\u00ec ph\u01b0\u01a1ng ph\u00e1p th\u00ed nghi\u1ec7m ch\u00e9o c\u00e0ng ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c nhi\u1ec1u h\u01a1n. V\u00ed d\u1ee5 khi th\u00ed nghi\u1ec7m v\u1edbi t\u00e1m nh\u00e2n t\u1ed1 v\u00e0 b\u1ea3y m\u1ee9c th\u00ed nghi\u1ec7m th\u00ec b\u00ecnh th\u01b0\u1eddng ph\u1ea3i ti\u1ebfn h\u00e0nh \u0111\u1ebfn 78 = 5.764.801 l\u1ea7n, n\u1ebfu d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p th\u00ed nghi\u1ec7m ch\u00e9o ch\u1ec9 c\u1ea7n 49 l\u1ea7n th\u00ed nghi\u1ec7m ch\u1ee9ng t\u1ecf hi\u1ec7u su\u1ea5t th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c t\u0103ng cao r\u1ea5t nhi\u1ec1u l\u1ea7n.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ph\u01b0\u01a1ng ph\u00e1p th\u00ed nghi\u1ec7m ch\u00e9o.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00f3 hai lo\u1ea1i h\u1ea1t gi\u1ed1ng 1 v\u00e0 2, c\u1ea7n t\u00ecm hi\u1ec3u xem lo\u1ea1i h\u1ea1t gi\u1ed1ng n\u00e0o cho s\u1ea3n l\u01b0\u1ee3ng cao ng\u01b0\u1eddi ta ph\u1ea3i ti\u1ebfn h\u00e0nh c\u00e1c th\u00ed nghi\u1ec7m. N\u1ebfu \u0111em h\u1ea1t gi\u1ed1ng 1 gieo v\u00e0o m\u1ea3nh \u0111\u1ea5t A c\u00f2n h\u1ea1t gi\u1ed1ng 2 gieo v\u00e0o m\u1ea3nh \u0111\u1ea5t B. K\u1ebft qu\u1ea3 thu ho\u1ea1ch c\u00f3 th\u1ec3 cho bi\u1ebft […]<\/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":[15,9],"tags":[],"class_list":["post-7694","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7694","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=7694"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7694\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}