在西北沿黄灌区，以马铃薯-大豆套田为研究对象，研究了地膜覆盖与套作对土壤水热效应和马铃薯产量的影响。结果表明，在马铃薯块茎增长期和成熟期，地膜覆盖马铃薯单作的土壤含水量显著高于套作。马铃薯各生育期，地膜覆盖马铃薯单作土壤温度显著高于套作。不同地膜覆盖马铃薯套作大豆的土地当量比(LER)均大于1。黑色地膜覆盖比透明地膜覆盖马铃薯水分利用效率提高了11.3%，产量提高了5.1%，且在一定程度上降低了马铃薯生育期土壤温度，有利马铃薯植株的生长及提高马铃薯产量，可作为西北沿黄灌区的马铃薯优化栽培方式。

The field of potato(Solanum tuberosum L) and soybean (Glycine max) interplanting is used to study the effects of plastic film mulching and intercropping on potato soil temperature， humidity and yield . The result shows that soil water content of plastic-film mulching monoculture cropping potato is significantly higher than that of intercropping in stage of tuber bulking， and maturity of potato . The soil temperature of monoculture is significantly higher than that of intercropping in every growing period of potato. LER of potato and soybean interplanting of different plastic-film mulching is more than 1. Compared to transparent plastic-film mulching plastic-film mulching， WUE and yield of black plastic-film mulching plastic-film mulching in potato increased by 11.3% and 5.1%， and reduced soil temperature of growth period， promoted plant growth and yield， as well as best tillage modes in Northwest Along Yellow River Irrigation Areas .

S532；S344.3

国家自然科学基金(41161042)；甘肃省干旱生境作物学重点实验室—省部共建国家重点实验室培育基地开放基金(GSCS-2012-13)资助