[目的]为了探讨不同磷肥用量对玉米产量、效益及养分吸收的影响,确定经济施磷量.[方法]采用田间试验方法,在海城、昌图和彰武地区进行不同磷肥用量试验.[结果]施磷可显著增加玉米产量和经济效益,各施磷处理比不施磷处理增产3.2％～21.5％,增收173 ～1 724元/hm2；施用磷肥可促进玉米对氮磷钾养分的吸收,但随着施磷量的增加,磷肥的增产效益和利用率降低.[结论]海城、昌图和彰武地区最高产量施磷量分别为89、116和129 kg/hm2,经济施磷量分别为77、98和100 kg/hm2.%[Objective] The research aimed to study the effects of different phosphorus application amounts on the yield, profit and nutrient uptake of maize and economic P2O5 application amount. [ Method] The field experiments of different phosphorus application amounts were conducted in Haicheng City,Changtu County and Zhangwu County. [Result]P application increased maize yield and profit by 3.2% -21.5% and 173 -1 724 yuan/hm2 compared with no P application treatment, respectively. Nutirient uptake could be promoted by the application of phosphorus fertilizer. The yield increase of unit P application and recovery of P decreased with the increase of P application amount. [ Conclusion ] P2O, application amount of the highest yield in Haicheng, Changtu and Zhangwu was 89,116 and 129 kg/hm2,respectively, and economic P2O5 application amount was 77,98 and 100 kg/hm2 ,respectively.
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