压力膜仪法在测定土壤水分特征曲线中的应用  

Application of Pressure Membrane Meter Method to Determination of Soil Moisture Characteristic Curve

作　　者：李春燕[1] 李红艳 石丽霞 

机构地区：[1]邯郸水文水资源勘测局,河北邯郸056001 [2]张家口水文水资源勘测局,河北张家口075000 [3]涉县水利局,河北涉县056400

出　　处：《人民黄河》2011年第9期60-61,共2页Yellow River

基　　金：河北省自然科学基金资助项目(D2009000827)

摘　　要：对压力膜仪法的工作原理、试验装置及操作方法进行了介绍。利用压力膜仪测定了某区沙土、原位沙、粉沙及黏土4种土壤的水分特征曲线,结果表明:压力膜仪能够同时测定多种土样,但测定周期长、步骤繁琐,存在容重变化问题。At first,this paper introduces the work principle,test device and operation method of the pressure-membrane meter method.On the basis,water characteristic curves for sandy,situ-sandy,silt and clay soils from deferent regions were determined by pressure-membrane meter.The results show that the operation of pressure-membrane meter is simple and many solid samples can be determined at same time.However,a few problems still remain by pressure-membrane instrument method,such as a long testing period,many steps,variable bulk density,and so on.

关 键 词：含水量 土壤水吸力 压力膜仪法 土壤水分特征曲线 

分 类 号：S152.7[农业科学—土壤学]