土壤斥水性对含水率的响应模型研究  

Response Models for Soil Water Repellency and Soil Moisture

作　　者：陈俊英[1,2] 吴普特[1] 张智韬[1] Gideon Oron 汪志农[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]中国科学院水利部水土保持研究所,陕西杨凌712100 [3]本古里安大学Blaustein沙漠研究所

出　　处：《农业机械学报》2012年第1期63-67,82,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：中国博士后科学基金资助项目(20110491700);武汉大学水资源与水电工程科学国家重点实验室开放基金资助项目(2010B070);西北农林科技大学人才专项资金资助项目(2009)

摘　　要：选用以色列3类不同质地的10种不同斥水性的土壤为研究对象,采用滴水穿透时间法测定土壤斥水性对含水率的响应关系,得到了不同土壤斥水持续时间随含水率变化的规律,通过Gaussian模型、Lorentzian模型和Lognormal模型对这种规律进行回归分析,最终得出了土壤斥水持续时间随含水率的变化规律符合Lorentzian模型。由此响应模型,就可以根据某种土壤部分斥水性对含水率响应的实测数据,计算出土壤斥水性的峰值含水率、峰值斥水性以及临界含水率,为不同土壤斥水性进行对比和土壤改良提供理论依据。The relationships between the soil water repellency and soil moisture were studied by measuring WDPT using 10 different water repellent soils collected from Israel.A single peak curve correlation of the relationships between the WDPT and soil moisture was obtained after analysis.Three mathematic models,namely Gaussian,Lorentzian and Lognormal distributions were used for fitting the models by regression analysis,and the Lorentzian distribution was found to be the best model for the practical use.The peak soil moisture,the peak WDPT and the critical soil moisture can be computed by the model of part measured WDPT and soil moisture.It can provide the theory for amelioration of soil and compare of the different repellent soils.

关 键 词：土壤斥水性 土壤含水率 响应模型 回归 

分 类 号：S152.7[农业科学—土壤学]