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减少棉花追肥次数,改多次追肥为一次集中追肥,是简化栽培的内容之一。据作者1981年试验结果,棉花一次集中追肥单产皮棉74.9公斤,比常规多次追肥71.8公斤增产4.29％,表明一次集中追肥省工、操作简便、效益明显,这些已有专题报道[中国棉花,1982(2)]。本文主要报道一次集中追肥对棉铃发育以及纤维品质的影响,进一步明确这一追肥方法的效果,为棉花生产大面积推行此法提供依据。
Reduce the number of top dressing cotton, dressing change to a number of times to concentrate, is one of the simplified culture content. According to the author’s 1981 test results, the cotton concentrate concentrates on 74.9 kg of single-cropped lint at a time, yielding 4.29% more than the conventional multiple-top dressing of 71.8 kg, which shows that concentrating on top dressing and labor saving at one time is simple and easy to operate with obvious benefits. These special reports have been reported [China Cotton, 1982 (2)]. This article mainly reports the effect of concentrated top dressing on boll development and fiber quality, and further clarifies the effect of this top dressing method to provide a basis for the implementation of this method on a large area of cotton production.