地膜覆盖栽培技术引入我省以来,以其明显的增产效果和经济效益使我省的棉花生产发生了很大的变化,1979～1987年,全省累计覆盖面积为484.84万亩,增产皮棉20多万吨,增值3亿元。在我省9年的试验、示范、推广中,摸索到增产变幅的规律是;在 Since the introduction of plastic film mulching cultivation technology into our province, cotton production in our province has undergone tremendous changes with its obvious yield-increasing effect and economic benefits. From 1979 to 1987, the province’s total covered area was 4,848,400 mu, with an increase of more than 20 Tons of tons, added 300 million yuan. In our province nine years of trial, demonstration, promotion, to explore the law of increasing amplitude is;