摘要
以我国具有代表性的土壤理化特性层间和空间变异资料为依据。基于广义电磁波与物质相互作用原理 ,分析了土壤理化特性变异对土壤介电常数、折射率、质量吸收系数等电磁特性参数的影响规律 ,得出了土壤介电常数的水分敏感性强而土壤的容重、质地影响小 。
Based on the theory of interaction between electromagnetic waves and matter and using the data of inter-layer and spatial variation of the physico-chemical properties of several typical soils in Northwest China, the effects of variations in soil physico-chemical properties of the soil on soil dielectric constant (ε s), complex refractive index (n) and mass absorption coefficient (u) were analyzed and the influence of soil bulk density and texture on electromagnetic measurement was investigated. It is concluded that ε s is highly sensitive to soil moisture and less sensitive to other physico-chemical properties of the soil and, therefore, the dielectric method is more adaptable and more precise for soil moisture measurement than any other methods.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2002年第3期193-199,共7页
Journal of Southwest Agricultural University
基金
国家自然科学基金项目 (49871 0 4 0 )
国家科技产业示范工程项目 (99- 0 2 1 - 0 1 - 0 2 )
