沙性土壤非饱和灌溉实验表明，土壤抽提液电导率和离子强度之间符合线性关系，且土壤溶液电导率和溶液总浓度之间也有很好的线性关系；土壤体电导率和溶液电导率的比值（＞１）与含水量成线性关系．在非饱和情况下用时间域反射仪测得水分和电导率数据，再利用此关系可进行溶质的输运研究． Unsaturated irrigation experiments on sandy soil showed that there was a linear relationship between conductivity and ionic strength of soil extract, and there was also a good linear relationship between conductivity of soil solution and total solution concentration. Soil bulk conductivity and solution conductivity (> 1) is linear with water content. Under non-saturated conditions, time-domain reflectometer was used to measure the moisture and conductivity data, and then the relationship between solute transport and transport was studied.