自1978年引进地膜覆盖栽培技术后,花生是重点试验作物。1979年首先在辽宁省试点,试验面积10.2亩;1980年扩大到北方几省,试种2000多亩;1981年扩大到辽、京、冀、黑、鲁、豫、津、赣、鄂九省、市,面积达37600亩,占全国农作物地膜覆盖示范面积的16％,仅次于蔬菜、棉花,居全国第三位。以后花生覆膜面积均成倍的增长。1982年为30多万亩,1983年为58万多亩,1984年为138万亩,1985年为350万亩。覆膜栽培花生已占全国各作物2200万 Since the introduction of plastic film mulching cultivation technology in 1978, peanuts are the key experimental crops. In 1979, it first piloted in Liaoning Province with a test area of ​​10.2 mu; it was expanded to several northern provinces in 1980 and planted more than 2,000 mu; it was expanded to Liaoning, Beijing, Hebei, Heilongjiang, Shandong, Henan, Tianjin, Jiangxi and Hubei provinces in 1981 The city covers an area of ​​37600 mu, accounting for 16% of the demonstration area of ​​plastic mulching in China. It is second only to vegetables and cotton and ranks third in the country. After peanut film area doubled growth. Over 300,000 mu in 1982, 580,000 mu in 1983, 1,380,000 mu in 1984 and 3.5 million mu in 1985. Covered peanut cultivation has accounted for 22 million of the country’s crops