晋西高寒山区的岚县,近年粮食作物亩产徘徊在100公斤左右,玉米亩产也不足200公斤.但是,该县岚城镇城内村的程全生,1987年种植3亩覆膜玉米,获得了总产2253公斤,平均亩产751公斤的好收成,为晋西高寒山区大幅度提高粮食作物产量提给了可贵的经验.他主要采取了以下几项关键栽培技术. In Lanxi County in the alpine mountainous area of ​​western Shanxi, in recent years, the mu production of grain crops hovers around 100 kilograms and the per mu of maize is less than 200 kilograms.However, Cheng Quansheng, Cheng Nei-village, Lan Cheng Town, planted 3 mu of plastic-covered corn in 1987, Producing 2253 kilograms, the average yield of 751 kilograms per hectare yield, for the Western Shanxi alpine mountain area greatly improve the yield of food crops gave valuable experience.He mainly adopted the following key cultivation techniques.