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用农膜覆盖种植农作物,具有保温、保墒,提早成熟,增加产量的效果。但是,如果农膜使用不当,不仅不会增产,反而会造成不应有的损失。为了充分发挥各类农膜的优势,现将目前市场上供应的农用塑料薄膜种类作系统介绍,以便农家能够合理地进行选用。 1.高压聚乙烯簿膜 这种薄膜外观为透明白色或半透明乳白色,表面滑腻,质地柔软。其主要优点是:耐老化、耐低温、耐腐蚀、无毒、粘性低、透气性强等。不足之处是:抗拉强度低、回弹力差。该膜多用于塑料大棚。生产上应选用厚0.08毫米～0.10毫米、幅宽3.2米～4米的高压聚乙烯薄膜。
Crops covered with plastic sheeting crops, with heat, moisture, early maturity, increase the yield effect. However, if the improper use of agricultural film, not only will not increase production, but will cause undue losses. In order to give full play to the advantages of all kinds of plastic sheeting, the types of agricultural plastic sheets currently supplied on the market are introduced systematically so that farmers can make reasonable choices. 1. High-pressure polyethylene film The appearance of this film is transparent white or translucent milky white, smooth surface, soft texture. Its main advantages are: anti-aging, low temperature, corrosion-resistant, non-toxic, low viscosity, breathable and so on. Deficiencies are: low tensile strength, poor resilience. The film used in plastic sheds. Production should be used thick 0.08 mm ~ 0.10 mm, width 3.2 m ~ 4 m high-pressure polyethylene film.