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一、概况用作地面覆盖的聚乙稀塑料薄膜简称为地膜,厚度为0.012～0.020毫米,为一般水稻育秧薄膜的1/5左右。地膜在国外已普遍应用在温室及露地栽培的园艺作物、花生、马铃薯、烟草、旱稻、甘蔗等多种作物的地面覆盖,以提高土温,保湿、保肥、减少杂草及病、虫害发生。由于覆盖地膜后增产、增收效果显著,故这项技术发展很快。如日本在1973年采用地膜覆盖栽培面积已占耕地面积的12%,1980年在
First, an overview Polyethylene plastic film for ground cover referred to as the plastic film, a thickness of 0.012 ~ 0.020 mm, about 1/5 of the general rice seedling film. Mulch has been widely used in foreign countries in the greenhouse and open-field cultivation of horticultural crops, peanuts, potatoes, tobacco, Upland rice, sugar cane and other crops cover the ground in order to improve the soil temperature, moisture, fertilizer, reduce weeds and diseases and insect pests happen . As the film after covering production, income significantly, so the technology developed rapidly. For example, in Japan, the area under mulch covering cultivation accounted for 12% of the cultivated area in 1973 and was in 1980