协优559旱育稀植高产栽培技术研究

Study on the Cultivation Technique of Dry-nursery and Sparsely Transplanting of Xieyou559

研究结果表明 :协优 5 5 9旱育稀植高产栽培适宜播期为 4月 2 5～ 30日 ,密度 18.0～ 2 2 .5万穴 /hm2 为宜 ;分蘖肥在移栽后 7～ 10d施用最佳 ,在田间总苗数达成穗数的 80 %～ 90 %时开始搁田 ,搁田由轻到重 ,有利群体协调发展 ;穗肥施氮肥 40kg/hm2 ,配合施用磷、钾肥 ,提高结实率、千粒重。上述措施配套 。

The experimental result showed that the suitable seeding time was from 25to30 April, the density was 180-225 thousand holes/hm 2, the time of top-dressing at tillering was from seventh to tenth day after transplanting, the midsummer drainage started when the rate of number of panicle to total seedling was 80%-90%. N-fertilizer was 40 kg/hm 2 as top dressing at young spike formation stage, with the application of phosphorus and potassium fertilizer, to reach high rate of seed-setting and high 1000-seed weight.