采用三因素五水平通用旋转组合试验设计方法,研究了种植密度、氮肥和缩节胺对棉花新品种KB02的产量及主要性状的影响,建立了相应的数学模型.结果表明,3个因素对子棉产量的作用为密度＞氮肥＞缩节胺,密度与氮肥、密度与缩节胺之间存在互作效应,在-1.682≤x≤1.682水平内,即密度为30000株/hm2,纯N为337.5 kg/hm2,缩节胺为90.0 g/hm2时,可达最高产量,最高产量y=4 344.71 kg/hm2.%The effects of density, nitrogen fertilizer, and 1-dimethylpiperidyliumchloride (DPC) on the yield and main characters of hybrid cotton KB02 were studied using general rotational regression design method and a mathematic model involving the three factors and seed cotton yield was established. The results indicated that the affecting degree of the three factors on seed cotton yield was as follows: plant density>nitrogen fertilizer>DPC. There were interaction effects between density and nitrogen fertilizer, density and DPC. In the horizontal range of -1.682≤x≤ 1.682 (i.e. plant density was 30 000 ind/hm2, nitrogen fertilizer was 337.5 kg/hm2, DPC was 90.0 g/hm2), the yield of KB02 could be up to the high yield of 4 344.71 kg/hm2.
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