Considering the problems of artificial seeding,sealing film hole in the traditional plastic film mulching,this paper studied the self-puncture effect of six crops in sub-soil planting with film mulching. The results showed that the self-puncture ability of different crops in film mulching was different and the difference was extremely significant. The self-puncture ability of peanut and maize was the strongest,and their relative seedling ratio reached 0.85 and 0.78 ,respectively . Pumpkin was the weakest and its relative seedling ratio was 0.48. The factor strongly affecting the crop self-puncture was membrane overlying soil thickness and the film thickness. In covering thickness of 0.008 mm thick film + membrane cover 2.0 cm thick soil,the crop self-puncture effect with film mulching was the best. If the crop had a strong self-puncture ability,its self-puncture was affected relatively little by cover material change. The full stand time of crops in sub-soil planting with film mulching was similar to control.%针对传统地膜覆盖需要人工放苗,封堵地膜破洞等问题,研究了6种不同作物在土下覆膜时的自动破膜效应.结果表明:不同作物的自动破膜能力差异极显著,花生、玉米的自动破膜能力最强,其相对出苗率分别达0.85和0.78,南瓜最弱为0.48;影响作物自动破膜效应的因素及各因素间的互作中,以膜上覆土厚度与地膜厚度的影响最大,覆盖厚度为0.008 mm地膜+膜上覆盖2.0 cm土壤时作物的自动破膜效果最佳;自动破膜能力越强的作物,其自动破膜效果受覆盖材料变化的影响也相对较低.采用土下覆膜种植方式,作物出全苗时间与对照相近.
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