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一、温度及其影响(一)低温期:使用透明多孔地膜,比黑色地膜透光性好,地温容易提高,但亦会促进杂草生长,顶起薄膜,现出售一种涂除草剂的地膜。但由于地表不平,地膜内附着的水滴在凹处落下,仅此处能除去杂草,凸面杂草仍能生长。绿色地膜,能确保
First, the temperature and its impact (A) low temperature: the use of transparent porous membrane, translucent than the black plastic film is good, easy to improve the ground temperature, but will also promote the growth of weeds, top film, is the sale of a herbicide-coated film . However, due to uneven surface, water droplets attached to the film fell in the recess, where only weeds can be removed, convex weeds can still grow. Green film, to ensure