山西省从1978年起开始引进地膜覆盖技术,逐步在蔬菜、瓜类、棉花、粮食等作物上开展试验、示范、推广工作。由于增产效果好,经济效益高,所以发展速度非常迅速。1978—1980年推广面积1100亩;1981—1984年推广达302万亩;1985—1986年推广210万亩。农民普遍反映,地膜覆盖栽培,能抗旱保墒,增温防寒、促连早熟。特剐在冷凉地带效果更 Since 1978, Shanxi Province has introduced the technology of plastic film mulching to gradually carry out experiments, demonstrations and popularization on crops such as vegetables, melons, cotton and grain. As a result of increased production efficiency, high economic efficiency, so the development speed is very rapid. 1978-1980 to promote an area of ​​1100 mu; 1981-1984 to reach 302 million mu; 1985-1986 to promote 2.1 million mu. Farmers generally reflect the mulching cultivation, drought drought and soil moisture, warming cold, and even premature. Special 效 in the cool zone more effective