【摘要】 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。更多还原

【Abstract】 Plastic film covering had an obvious effect on crop yield by means of raising the soil temperature and preserving the soil moisture and improving the crop growth environment in the river vally regions which lack of rain and heat in spring in Tibet. In the experiment corn and potato yield increased by 49% and 55.7%,and the net income was 33.0% and 50.9% per mu respect-tively compared with the plot which wasn’t be covered with plastic film. The most harvesting one was interplanting corn with potato both with covered with plastic film.更多还原