提高优质水稻耿籼1号产量的优化施肥方案

为确定优质稻耿籼1号的最优施肥用量,通过田间小区试验,采用3因素5水平2次正交旋转回归组合设计,研究了氮、磷、钾不同配比对其产量及构成因素的影响。结果表明,耿籼1号最优施肥组合方案为氮肥(46%尿素)255 kg/ hm2,磷肥(17%普钙)600 kg/ hm2,钾肥(50%硫酸钾)150 kg/ hm2,产量可超过8 829 kg/ hm2。建立的耿籼1号最高分蘖数、成穗率、产量与肥料用量的优化数学模型,经检验达到显著性水平。

Fertilizing methods for high yields of rice cultivar Gengxian No.1

Abstract: To determine the optimum fertilization for rice cultivar Gengxian No.1, field plot experiment using orthogonal rotational combination design with three factors and five levels was conducted to investigate the effects of fertilizers with different ratios of N, P and K on the yield component of Gengxian No.1. The results showed that the optimum fertilization model include 46% urea, 255 kg/ hm2; 17% calcium superphosphate, 600 kg/ hm2 and 50% potassium sulfate, 150 kg/ hm2, under which the yield could exceed 8 829 kg/ hm2. The optimized mathematical models was created between the maximum tillering, formation of spike from the tillers, yield and the fertilizer, which reached significant level.