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试验采用短季棉品种鄂棉13号夏播,以中熟品种为对照,设置60000,75000,82500株/hm~2三种密度处理,研究其产量形成规律。三年研究结果表明,鄂棉13号由营养生长转向生殖生长的时期较早,单株果枝,果节增长速度快,其果节形成高峰期比中熟种提早10～15d;现蕾及成铃高峰期亦相应提早10～15d;伏桃和早秋桃比例、10月20日前收花量均比中熟种大,早熟性好;75000～82500株/hm~2为其适宜的高产栽培密度。
Short-season cotton variety E-mian 13 was used for summer sowing. Medium-maturing varieties were used as control, and three density treatments of 60000, 75000 and 82500 plants / hm ~ 2 were set up to study the law of yield formation. Three years of research results showed that Emeian 13 from vegetative growth to reproductive growth earlier, fruit branch per plant, fruit section growth rate, the peak of its fruit section than the mature species early 10 ~ 15d; bud and into The bell peak also corresponding early 10 ~ 15d; peach and early autumn peach ratio, before October 20 received more than moderately mature varieties of large, good early maturity; 75000 ~ 82500 / hm ~ 2 for its suitable high-yielding cultivation density .