1986～1987年,在西藏春旱少雨,热量条件不足的高寒河谷农区进行了地膜覆盖栽培技术试验,结果表明不仅具有明显的增温,保墒作用,而且能有效地改善土壤与作物生长的环境条件,促进作物生长,获得显著增产。玉米、土豆覆膜亩产分别比对照增产49％和55.7％;每亩纯收益比对照提高33.0％和50.9%;以土豆+玉米处理的增长幅度最大。 From 1986 to 1987, the experiment of plastic film mulching cultivation was carried out in the agricultural areas of the alpine valley with less drought and less heat in Tibet. The results showed that it not only had obvious effects of increasing temperature and preserving soil moisture but also effectively improving the environment of soil and crop growth Conditions, promote crop growth, access to significant increase in production. The yield per mu of corn and potatoes increased by 49% and 55.7% respectively compared with the control; the net profit per acre was increased by 33.0% and 50.9% compared with the control; the growth rate was the highest by potatoes and maize.