摘要
该文以我国几种有代表性的土壤理化特性变异资料为基础,分析土壤颗粒的介电特性变异,研究介电法测量时土壤容重、化学成份、质地及其温度变化等对测量的影响。研究表明:用介电法来测量土壤水分是一种适应面广,精度较高的方法。
Radio frequency, microwave frequency dielectric method is an important way to measure soil moisture. But its adaptability to variation of field soil physical and chemical properties has not been studied so far. In this paper, using the data of several, typical soil physical and chemical properties, the variation of soil dielectric constant (εs,) is analyzed, and the influence of the soil bulk density, physical and chemical property, temperature and instrumental error to dielectric measurement is studied. It is concluded that the dielectric method is more adaptable and more precise for soil moisture content measurement than many other methods.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
1995年第2期21-26,共6页
Transactions of the Chinese Society of Agricultural Engineering
关键词
介电特性
土壤水分
土壤理化特性
测定误差
Dielectric properties Soil moisture Soil physical and chemical properties Inst.ru mental error
