摘要
根据1986～1988年试验结果,选择对产量有明显影响的5项农艺措施为决策变量,于1989年和1990年在长沙和新化两试点进行五元二次正交旋转试验,供试杂交水稻品种威优48-2。试验结果:自变量对产量的影响顺序是播种期>播种量>施磷>施氮>施钾。在试验设计范围内,播期提早,播种虽减少,增施氮、磷、钾肥对旱种高产有利。每公顷产量在6000～6750kg的优化方案是:4月1日播种,播量41.1kg,施尿素330kg,过磷酸钙400kg,氯化钾155kg。
According to the results of experiments from 1986～1988 five agricultural measures which affect the yield most were chosen as determinant variables and examined in a five-variale parabolic experiment of orthogonal rotation with hybrid rice V48-2 in Changsha and Xinhua in 1990. The results indicated that the influence of the five variables on the yield was in the order of seeding time>sowing norm>P application>N application>K, application.Higher yields were obtained in the treatments of earlier seeding time, less sowing norm and application of N, P, K. An optimized System for yielding 6000～6750 kg/ha is suggested as follows. Sowing time April 1; sowing norm 41.1kg/ha; N,P,K applications urea 330kg,calcium superphosphate 400kg, and potassium chloride 155 kg per hectare.
关键词
水稻
氮肥
磷肥
钾肥
播种期
栽培
lowland rice
nitrogenous fertilizer
phosphatic fertilizer
potassium fertilizer
optimization
sowing norm
sowing time
