电阻法在喷灌土壤水分入渗再分布测定中的应用  

Application of Electric Resistance Method for Measuring Soil Water Infiltration and Redistribution under Sprinkler Irrigation

作　　者：孙泽强[1,2] 康跃虎[2] 赵爱国[3] 刘海军[4] 

机构地区：[1]山东省农业科学院土壤肥料研究所,山东济南250100 [2]中国科学院地理科学与资源研究所,北京100101 [3]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [4]北京师范大学水科学研究院,北京100875

出　　处：《山东农业科学》2009年第11期107-110,共4页Shandong Agricultural Sciences

基　　金：中国科学院知识创新工程重要方向性项目(KSCX2-YW-N-003);国家科技支撑计划课题(2007BAD87B05)

摘　　要：土壤通常是导电的,其电阻率随其含水量的大小而变化,电阻式土壤水分动态测定仪就是基于这种原理进行测量的。通过土壤电阻率的突变可以判断土壤水分湿润锋到达的时间,不同深度的探头组合就可以分析得出土壤水分入渗速率,可以定量研究土壤水分的入渗过程。田间试验结果表明:喷灌土壤水分入渗时间和入渗深度之间的关系可以表示为对数形式。电阻法测定土壤水分入渗还需要进一步研究。Electric resistance soil water dynamics meter works with the theory that soil is commonly electric and its resistivity changes with its water content. The wetting front arrival time could be judged by the mutation of soil resistivity, and using the different sensors, the soil water infiltration rate could be obtained. Through this method, the soil water infiltration process could be quantiteatively studied. The field experiment results indicated that the relation of soil water infiltration time and infiltration depth could be expressed by the logarithmic equation under sprinkler irrigation. The further study was needed on measuring soil water infiltration by electric resistance method.

关 键 词：电阻法 土壤水分入渗 喷灌 

分 类 号：S275.5[农业科学—农业水土工程]