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塑料薄膜地面覆盖栽培技术在农业生产上应用,促进了我国塑料薄膜工业的发展。目前,我国生产的农用地膜主要有普通塑料地膜、线型低密度地膜、低压高密度超薄地膜、可控光解膜等。普通塑料地膜.即高压低密度聚乙烯薄膜(工业代号LDPE,简称高压膜)。这是目前普遍用于农作物地面覆盖栽培的一种塑料薄膜,因此叫普通地膜。它是用高压聚乙烯吹制而成,厚度为0.013～0.018毫米,出厂时单幅卷成筒状。薄膜幅宽、厚度、每卷重量等规格因覆盖作物不同而各异。有的还按作物栽培的密度预先在膜上打好圆孔。除覆盖花生的薄膜厚度不能超过0.014毫米(超厚花生果针下扎困难)外,其他作物对厚度要
The application of plastic film ground covering cultivation technology in agricultural production has promoted the development of plastic film industry in our country. At present, China’s production of agricultural plastic film are mainly ordinary plastic film, linear low-density film, low-pressure high-density ultra-thin plastic film, controllable photolytic film. Common plastic film, that is, high-pressure low-density polyethylene film (industrial code LDPE, referred to as high-pressure film). This is currently a plastic film commonly used for the cultivation of crops on the ground, so called ordinary film. It is blown with high pressure polyethylene, thickness of 0.013 ~ 0.018 mm, the factory roll into a single volume. Film width, thickness, weight per roll and other specifications vary due to cover crops. Some also according to the density of crop cultivation in advance on the membrane hole. In addition to covering the peanut film thickness can not exceed 0.014 mm (super thick peanut needles down the difficulties), other crops on the thickness to