地膜除草、保暖是从外表看来已经习惯的使用方式,其实地膜的主要作用是节水、调节土壤成份,其次才是部分除草。对于保暖来说,可说没有,也可以说是“无用保暧”,它的“保暖”只是增加土壤温度,通过借用天气暖和,太阳热量,光合辐射,使地膜内部的温度升高,但对地膜以外的温度没有提高,所以对农作物没有“保 Membrane weeding, warm from the appearance seems to have been accustomed to using the way, in fact, the main role of the film is water-saving, regulating soil composition, followed by some weeding. For the warmth, we can say no, it can be said to be “useless Paul warm”, its “warmth” just increase the soil temperature, by borrowing the warm weather, solar heat, photosynthetic radiation, so that the internal temperature of the film, but the The temperature outside the film did not increase, so there is no protection of crops