采用大田试验的方法，研究了磷肥施用量对旱地全膜双垄沟播玉米产量、磷素积累和分配及磷肥利用效率的影响。结果表明，施P2O5为150 kg/hm2、200 kg/hm2时，籽粒产量较对照分别增加12.37%、13.64%，显著高于其它处理。完熟期玉米植株各器官磷素积累量随施磷量增加而相应增加，但分配比例差异不显著，籽粒磷素积累量最大，占植株磷总量的61.7%～64.5%。磷肥农学利用率、磷肥偏生产力、磷肥表观利用率和生理利用率均随磷肥施用量的增加显著下降。综合各因素，P2O5用量为150 kg/hm2时可达到高产高效。

Field experiments were carried out to study the effects of phosphorus(P) fertilizer (50，100，150，200 kg/hm2) on yield， accumulation， distribution and use efficiency of phosphorus under the condition of whole field surface plastic mulching and planting in furrows. The results showed that corn yield in phosphorus application 150 kg/hm2， 200 kg/hm2 increased by 12.37%， 13.64%， compared with CK， significantly higher than other treatments； phosphorus accumulation in various organs of ripening corn plants increased with the increasing of phosphorus application rate， but there had not significant different in the distribution， the largest accumulation of phosphorus was grain， accounting for 61.7%-64.5% of plant total phosphorus； The agronomic efficiency， partial factor productivity， apparent recovery efficiency and physiological efficiency decreased significantly with increasing the amount of phosphorus； comprehensively considered with every factor， phosphorus application 150 kg/hm2 could achieve the highest yield of corn under the condition of whole field surface plastic mulching and planting in furrows in dryland.

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国家重点实验室基金(10201-244)；甘肃省自然科学基金(1010RJZA177)部分内容