农田土壤水分测定三种方法的比较  

Comparison of Three Methods for Measuring Soil Moisture in the Field

作　　者：龚元石[1] 李春友 李子忠 

机构地区：[1]中国农业大学,北京圆明园西路2号100094

出　　处：《中国农业大学学报》1997年第3期53-58,共6页Journal of China Agricultural University

基　　金：国家自然科学基金;"八五"重大项目!49391600

摘　　要：应用时域反射仪（TDR）、中子仪和上钻法测定了农田土壤水分，并对农田土层含水量和主体贮水量的测定结果进行了比较。结果表明，三种方法的测定结果存在一定的差异，TDR测定农田土壤水分最精确且稳定性好。本文还提出了用TDR配合上钻法测定农田土壤容重的方法。The soil moisture is measured in the field by time domain reflectometry (TDR), neutron probe and soil sampling, The results showed that the measured values are different. TDR measurement is most accurate among the three methods and much more stable. In addition, a method by the use of TDR combining with soil sampling to evaluate the soil bulk density in the field has been developed.

关 键 词：土壤水分 测定 时域反射仪 

分 类 号：S152.7[农业科学—土壤学]