土壤介电常数影响因素的研究综述

Review on Factors Affecting Soil Dielectric Constant

土壤介电常数作为描述土壤介电特性的物理量,可以反映土壤的特性,它是高频物探设备应用于探测土壤重金属污染的关键参数,也是开展微波土壤水分和冻融状态监测等的基础。影响土壤介电常数的因素众多,通过综合分析近年来的相关研究成果,总结得出影响土壤介电常数的因素主要有土壤特性、外界因素(有机质、盐度、矿物质等)、污染介质以及其他因素(频率、含水率、温度、冻融过程等)等4类,并且分别探讨了各种因素对土壤介电特性的影响。

Dielectric constant as to describe the soil dielectric characteristic quantities, can reflect the characteristics of the soil. The soil dielectric constant is not only a key parameter of high frequency geophysical equipment applied to detect the pollution of soil heavy metal, but also the basis for carrying out microwave soil moisture and monitoring the freeze - thaw state. However, there are many factors to influence the soil dielectric constant. Through comprehensive analyzing the relevant research results in recent years, It is concluded that the factors affecting soil dielectric constant are soil properties, external factors （ organic matter, salinity, minerals, etc. ） polluted media and other factors（ frequency, water content, temperature, freeze - thaw process）, and discussed the influence of various factors on the soil dielectric constant.