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近20年,我国农业领域广泛使用地膜。当前使用地膜主要是聚乙烯地膜,根据其材料可分为低密度聚乙烯地膜(CDDE)、线性低密度聚乙烯地膜(CDDE)、高密度聚乙烯地膜(HDPE)和聚乙烯共混地膜及草纤维地膜等。这些地膜具有透光增温性好、保水保肥、疏松土壤等多种效应,我国北方低温寒冷地
In the past 20 years, the plastic film has been widely used in agriculture in our country. Currently used plastic film is mainly polyethylene film, according to its material can be divided into low density polyethylene film (CDDE), linear low density polyethylene film (CDDE), high density polyethylene film (HDPE) and polyethylene blend film and grass Fiber film and so on. These mulching film has the advantages of good light transmission and warming, water and fertilizer, loose soil and other effects, low temperature and cold in northern China