【目的】提高棉田磷肥利用率。【方法】磷酸二铵、重过磷酸钙两种肥料不同施肥水平在棉花各生育期对土壤全磷和有效磷的影响。【结果】施磷可以增加土壤有效磷、全磷含量;不同施磷水平在棉花苗期、蕾期重过磷酸钙对土壤有效磷、全磷的影响显著超过磷酸二铵;在棉花各个生育时期,磷酸二铵各水平、重过磷酸钙施P2O5751、50和300 kg/hm2与不施磷相比土壤有效磷差异不显著。【结论】建议施磷量为150 kg/hm2即可满足棉花需要。 【Objective】 To improve the utilization rate of phosphate fertilizer in cotton field. 【Method】 Effects of different fertilizers, diammonium phosphate and heavy superphosphate, on soil total phosphorus and available phosphorus in different growth stages of cotton. 【Result】 Phosphorus application increased soil available phosphorus and total phosphorus. Different phosphorus application levels significantly affected soil available phosphorus and total phosphorus over diammonium phosphate in cotton seedling stage and bud stage. In all cotton growing stages , The level of diammonium phosphate, P2O5751, 50 and 300 kg / hm2 under the superphosphate application were not significantly different compared with no phosphorus application. 【Conclusion】 It is suggested that 150 kg / hm2 phosphorus can meet the needs of cotton.