覆膜灌水技术对农田地膜清除的影响

农田塑料薄膜（地膜）污染对土壤环境危害很大，覆膜灌溉技术可能会增加其复杂性。本文以新疆为例，依据材料力学试验结果，分析了覆膜灌水技术增加田间地膜回收难度的原因，得出：覆在地膜上的土壤浸水后硬结以及地膜老化使其抗拉强度降低是造成揭膜困难的最主要原因。最后根据这一结论提出了解决这些问题的相关建议。

Effects of Plastic Mulched Irrigation Techniques on Clearing Plastic Sheeting away from Farmland

The plastic sheeting used in farmland extremely pollutes and sabotages the soil environment. Plastic mulched irrigation techniques, however, can complicate the pollution problem. Experiments on the mechanical characteristics of materials were carried out to analyze the causes that the mulched irrigation techniques obstruct the plastic sheeting from being cleared off farmland in Xinjiang. We found out that the solidified earth covering on the plastic sheeting and being soaked by water, and the aged sheeting whose tensile strength was reduced, and that was the primary cause of difficulty in clearing the plastic sheeting off the farmland. The present results give some suggestions for solving the pollution problem.