覆膜土壤水分入渗特性研究  

Water Infiltration Characteristics of the Soil with Plastic Film Mulching

作　　者：王慧[1] 李绍才[1] 龙凤[1] 孙海龙[2] 

机构地区：[1]四川大学生命科学学院,成都610064 [2]四川大学水力学与山区河流开发保护国家重点实验室,成都610064

出　　处：《节水灌溉》2014年第5期22-24,33,共4页Water Saving Irrigation

基　　金：国家科技支撑计划(2012BAD11B03);国家科技支撑计划(2011BAK12B04)

摘　　要：为探究覆膜条件下坡度、水分容量对土壤水分入渗的影响,采用室内人工模拟降雨,比较分析了在同一降雨强度下不同坡度梯度、不同水分容量的覆膜土壤水分的入渗率、累积入渗量等指标的动态变化。结果表明:15°,30°,45°坡度条件下,覆膜水分入渗所受影响较小;当坡度为65°时,覆膜土壤水分入渗率与累积入渗量显著性降低。10kg/m2水分容量时覆膜土壤水分入渗速率与累积入渗量均为最低,22kg/m2水分容量时达到最大,14与18kg/m2水分容量的入渗率与累积入渗量差异较小。In order to study the effect of slope and soil water capacity on the soil with plastic film mulching, artificial rain was used in the lab experiments and the dynamic changes of soil water infiltration rate, the dynamic changes of soil water cumulative infiltration rate under different slope or different soil water capacity were analyzed. The result showed that the slope has little influence on the soil water infiltration and the soil water cumulative infiltration rate when the slope was 15°, 30°, 45°, but the soil water infiltration and the soil water cumulative infiltration rate would be decreased significantly when the slope was 65°. And the 14 kg/m2 or 18 kg/m2 soil water capacity had little effect on the soil water infiltration, the soil water infiltration rate and the soil water cumulative infiltration rate would be the maximum when the soil water capacity was 22 kg/m2, and be the minimum when the soil water capacity was 10 kg/m2

关 键 词：模拟降雨 坡度 水分容量 水分入渗 

分 类 号：S152.7[农业科学—土壤学]