田间试验研究了露地种植、秸秆覆盖和地膜覆盖对马铃薯产量和水分利用效率的影响。结果表明，秸秆覆盖和地膜覆盖均显著提高了马铃薯地上地下生物量，同时也提高了马铃薯块茎产量和水分利用效率。与露地种植相比，秸秆覆盖和地膜覆盖马铃薯块茎产量分别增加55.86%、78.05%，水分利用效率分别提高17.38%、26.13%。

Field experiments were conducted to study the effects of open field planting， straw mulching and plastic film mulching on potato yield and water use efficiency. The results showed that the straw mulching and plastic cover significantly improve potato underground biomass on the ground， but also improves the potato tuber yield and water use efficiency. Compared with open field， straw mulch and plastic film mulch increased potato tuber yield by 55.86% and 78.05%， respectively， and increased water use efficiency by 17.38% and 26.13%， respectively.

S532

甘肃省科技重大专项计划“寒旱区优势作物绿色提质生产技术研究与示范”(20ZD7NA007)；定西市科技支撑计划“干旱半干旱地区马铃薯化肥农药‘双减’关键技术集成与示范”(DX2020N09)。