近年来,我国地膜覆盖栽培面积越来越大,对促进农业生产起了不可低估的作用,但随之也带来了两个问题,一是制作地膜的原料趋向紧张;二是地膜在土体的残留量越来越大。针对这些问题,为了利用残旧塑膜,节约原料,从1987年7月开始,我们利用残旧地膜进行了经济地膜的试制和应用研究。 In recent years, China’s growing area of ​​plastic film mulching has played an important role in promoting agricultural production, but it has also brought about two problems. First, raw materials for making mulch tend to be tense. Second, The residual amount is bigger and bigger. In response to these problems, in order to use the old plastic film, saving raw materials, from July 1987 onwards, we use the residual film for the economic production and application of plastic film research.