在张掖干旱绿洲灌溉区进行了膜草覆盖玉米栽培试验，探讨膜草覆盖对土壤水热效应、玉米生长发育及地膜残留的影响。结果表明，与全膜覆盖相比，地膜与小麦秸秆覆盖具有较好的保墒效果，生育期耗水量仅增加1.99%，玉米产量及水分利用效率分别仅降低4.05%、5.92%。膜草覆盖地膜投入量比全膜覆盖减少40.94～41.55 kg/hm2，地膜残留量减少11.01～11.54 kg/hm2。综上分析，认为地膜与小麦秸秆覆盖栽培可有效提高水资源利用效率、玉米产量，降低环境污染。

The cultivation experiment of corn covered with film-grass was carried out in Hexi Oasis Irrigation Area to explore the effects of film-grass mulching on soil hydrothermal effect, corn growth and development, and film residue. The results showed that compared with full film mulching, plastic film mulching and wheat straw mulching had better effect on soil moisture conservation, water consumption increased by only 1.99% during growth period, and corn yield and water use efficiency decreased by 4.05% and 5.92%, respectively. The input amount of plastic film mulched with film grass decreased by 40.94～41.55 kg/hm2 and the residual amount of plastic film decreased by 11.01~11.54 kg/hm2. In conclusion, plastic film mulching and wheat straw mulching can effectively improve water use efficiency, corn yield, reduce environmental pollution and promote the sustainable development of agricultural production.

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国家重点研发计划项目(2018YFD0800806)；甘肃省农业科学院科技创新专项(2017GAAS25)。