对甘肃省榆中县11个监测点的农田地膜残留情况进行调查及取样分析。结果表明，玉米和蔬菜作物农田中地膜残留量与覆膜年限和种植作物种类密切相关，地膜残留量随着覆膜年限的增加呈线性增长；蔬菜田中地膜残留量高于玉米田中地膜残留量；农田地膜残留量当年秋季高于下年春季。

Based on the investigation and sampling analysis of farmland plastic film residue in 11 monitoring sites in Yuzhong County. The results showed that the amount of mulching film residual in corn and vegetable crops was closely related to the mulching period and planting crop species， and the amount of mulching film residual increased linearly with the increase of mulching period； The amount of plastic film residue in vegetable field was higher than that in corn field； The residue of mulch in farmland was higher in autumn than in spring of next year.

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