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１．冬暖大棚、拱棚应选用无滴塑料薄膜 ,因透光性好 ,棚内增温效果明显 ,而且还能提高作物的光合作用 ,以利提高棚内作物的产量。２．用于春季作物覆盖的薄膜 ,应选购透明薄膜 ,因透光率强 ,地温提高快 ,作物生长发育快 ,促使早熟。３．杂草严重地块 ,最好选购黑色膜。在高温?
1. Winter warm shed, shed shedding plastic film should be selected drip, because of good light transmission, greenhouse warming effect is obvious, but also improve the photosynthesis of crops, in order to facilitate the production of shed crops. 2. For the film covering spring crops, should choose a transparent film, due to the light transmittance, ground temperature increased rapidly, crop growth and development, prompting premature. 3. Weeds in the block, the best buy black film. At high temperature?