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目前国内生产的地膜种类很多,不同种类的地膜又各自具有特异的性能.透明地膜 有聚乙烯(PE)和聚氯乙烯(PVE)两种原料吹塑加工而成的地膜,两者光的吸收和透光率相近,只是聚乙烯地膜由于能透过长波辐射,保温性能比聚氯乙烯稍差,但使用安全,透光率大,增温保墒效果好,适于低温季节使用.晴天中午,薄膜本身和膜下附着的水滴对光的反射率可达30%左右,有利植物的光合作用.
At present, there are many types of mulch produced in China, and different types of mulch have their own specific properties. The transparent film is made of plastic film blown from two raw materials, polyethylene (PE) and polyvinyl chloride (PVE) And the transmittance is similar, but because of the polyethylene film through the long-wave radiation, thermal insulation performance is slightly worse than that of polyvinyl chloride, but the use of safety, light transmittance, good effect of warming soil moisture, suitable for low season use. Sunny noon, The film itself and the water droplets attached to the membrane reflectance of light up to 30%, beneficial plant photosynthesis.