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地膜覆盖具有促进作物根系生长发育,提高光能利用率,稳定土壤墒情,促进土壤微生物活动,改善土壤物理化学性状等多方面的作用。笔者1992年安排了掖单4号地膜制种试验40亩,结果亩产比对照(未盖膜)增产36。
Mulching has many functions such as promoting root growth and development, improving light energy utilization, stabilizing soil moisture, promoting soil microbial activities, and improving soil physico-chemical properties. In 1992, the author arranged a test of 40 mu for film mulching of Yedan No.4, with the result that the yield per mu was 36 more than that of the control (uncovering film).