时下,塑料薄膜在农村被广泛使用,对于农作物的增产增收起到了重要作用。但是,如果那些废旧的农膜弃留在田间,所带来的危害是不容忽视的。因为农膜属于高分子化合物,极难降解,既不受微生物侵蚀,也不能自行分解,其降解周期一般为200～300年,降解过程中还会溶出有毒物质,污染农田。随着使用地膜栽培年限的延长,残留地膜若得不到及时清理回收,还会导致水稻、棉花、玉米、花生、红薯、高粱等农 Nowadays, plastic film is widely used in rural areas, which has played an important role in increasing crop yield. However, if those abandoned plastic sheeting left in the field, the harm caused can not be ignored. Because the plastic film is a polymer compound, extremely difficult to degrade, neither by microbial erosion, it can not be self-decomposition, the degradation cycle is generally 200 to 300 years, the degradation process will dissolve toxic substances, pollute the farmland. With the prolongation of the use of mulching cultivation, if the residual mulch film can not be cleaned up in time, it will lead to farmers such as rice, cotton, corn, peanut, sweet potato and sorghum