试验目的:在棉花上施用腐铵和腐铵磷对提高棉花产量和品质都有一定的效果。又据国外资料报道,微量元素锌、硼、硫施于棉花可以减少蕾铃脱落,增加棉花产量。本试验主要研究不同种类的微量元素肥料同腐铵混合施用在棉花上的效果。材料和方法:1.供试土壤:本所老棉田,老冲积性粉砂壤土,pH6.5,有机质含 Purpose of the experiment: Applying ammonium and ammonium phosphate on cotton has a certain effect on improving cotton yield and quality. According to foreign data, trace elements such as zinc, boron and sulfur applied to cotton can reduce the shedding of buds and increase the yield of cotton. The main purpose of this experiment is to study the effect of different types of trace element fertilizers mixed with ammonium chloride on cotton. Materials and methods: 1. Test soil: the old cotton fields, the old alluvial silty loam soil, pH6.5, organic matter