【摘 要】
：
1999年和 2 0 0 0年作者在昆明市寻甸县王家箐流域坡地进行了五种耕种方式的玉米试验。结果表明 :与传统的凸型覆膜一样 ,凹型覆膜同样能保持土壤水分 ,促进玉米生长发育、提
【机 构】
：
中国农业大学作物学院,云南农业大学 100094,650201,昆明
论文部分内容阅读
1999年和 2 0 0 0年作者在昆明市寻甸县王家箐流域坡地进行了五种耕种方式的玉米试验。结果表明 :与传统的凸型覆膜一样 ,凹型覆膜同样能保持土壤水分 ,促进玉米生长发育、提高产量。覆膜处理对土壤水分的影响表现为 :晴天覆膜处理土壤水分含量高于裸地 ,阴天二者差异缩小 ,雨后覆膜处理土壤水分含量低于裸地 ;随着土层深度的增加 ,覆膜与不覆膜之间土壤水分含量差异缩小。传统的凸型覆膜种植下雨时雨水汇集行向增大坡耕地径流 ,凹型覆膜种植能减轻坡地水土流失。
In 1999 and 2000, the author carried out five kinds of maize experiment on the slope of Wangjiatang watershed in Xundian County, Kunming. The results show that, like the traditional convex film, the concave film can also maintain the soil moisture, promote the growth and development of maize and increase the yield. The effects of plastic film mulching on soil moisture were as follows: the moisture content of mulching film in sunny days was higher than that in bare mulch, and the difference between cloudy days and the mulching film was less than that in bare mulch; , The difference of soil water content between covered and uncovered reduced. When the rainwater is collected from the traditional convex film mulching, the flow of slope rainwater increases and the concave film mulching can reduce soil erosion on the slope.
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