(一)农民呼唤有孔地膜。地膜覆盖农作物已越来越被广大农民所接受和采用,但普通地膜内形成的温度过高或过低,都会影响农作物的生长,且农作物顶壳时,还要逐个把农膜剪出小孔,促期抽芽生长,费时费力。为此,广大农民盼望厂家能生产有孔地膜。有孔地膜一是能调节土壤温度。其膜内最高温度比普通地膜降低3℃至8℃,避免了温度过高过低,有利于作物根系生长。二是维持土壤水分平衡。由于有孔 (A) farmers call a hole in the film. Plastic film mulching crops have been more and more accepted by the majority of farmers and adoption, but the common film formed within the temperature is too high or too low, will affect the crop growth, and crop top shell, but also one by one to cut the crop filming holes , Promote bud germination growth, time-consuming and laborious. To this end, the majority of farmers look forward to manufacturers can produce perforated film. The first is to adjust the temperature of the soil film. The maximum temperature in the film is lower than ordinary film 3 ℃ to 8 ℃, to avoid the temperature is too high too low, is conducive to crop root growth. The second is to maintain soil moisture balance. Due to holes