氮、磷、钾肥配合施用对春育夏栽棉花的效应研究

Studies on the Effects of NPK to Cotton Seeded in Spring and Transplanted in Summer

采用三因素五水平二次正交旋转组合设计方法 ,研究了在中上等地力棉田上 ,移栽密度52 50 0株 /hm2 条件下 ,春育夏栽棉花氮肥、磷肥、钾肥的配合施肥效应。根据试验结果 ,建立了以籽棉产量、皮棉产量和霜前皮棉产量及部分产量构成因素为目标的肥料效应函数模型 ,分析了配方施肥增产的原因。并在此基础上模拟选优 ,制订出了籽棉产量 390 0 kg/hm2 、皮棉产量 150 0 kg/hm2 、霜前皮棉 1380 kg/hm2 以上的氮、磷。

According to the data obtained through puadratic rotated combination design on the ba- sis of three factors and five levels in moderate fertility degree field with 5 2 5 0 0 plants/ hm2 ,it established the regresion models which aim at cotton yield,lint yield and lint yield before frostin the cotton field forseeding in spring and transplanted in summer,selected the plan of fertilizer,which cotton yield≥ 390 0 kg/ hm2 ,lint yield≥ 1 5 0 0 kg/ hm2 and lintyield≥ 1 380 kg/ hm2 .