摘要
从广义电磁波角度 ,讨论了土壤水分电磁测量方法的物理机理 ,详细分析了土壤水分广义电磁测量方法的研究历史、现状和问题。指出现有各种土壤水分电磁测量方法误差大的核心原因是由于土壤理化特性空间变异造成的 ,因此 ,深入研究田间土壤理化特性空间变异对土壤电磁特性影响规律 ,寻找水分敏感性强而土壤容重、质地、含盐量影响小的测量方法和测量频率 。
Based on electromagnetic theory, the physical mechanism of soil moisture electromagnetic measurement methods are discussed, and its research history, advances and problems are analyzed. It is concluded that the key problem of research is lacking to analysis of soil physical and chemical properties variation to soil moisture measurement, so analyzing influence of the soil bulk density, physical and chemical property to soil electromagnetic property, finding the method and measurement frequency of high sensitive to soil moisture and less sensitive to soil physical and chemical properties, combining above researches and technique of sensor together to study the soil moisture measurement technique is the research orientation.
出处
《干旱地区农业研究》
CSCD
北大核心
2002年第2期72-78,共7页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目 (4 98710 40 )
国家 863项目 (2 0 0 1AA2 42 0 62 )
