天津滨海地区土壤电导率的测定及其与含盐量的关系

Measurement of Soil Electric Conductivity and Relationship Between Soluble Salt Content and Electrical Conductivity in Tianjin Coastal Area

根据天津滨海盐渍土的特点,采集了不同类型盐渍化土壤样品160个,测定了不同土水比土壤浸提液电导率与水溶性盐含量,系统研究了质量法测定的土壤含盐量与不同土水比浸提液电导率之间的关系。结果表明:不同土水比土壤浸提液电导率与土壤全盐量之间都呈极显著正相关关系,并得出了天津滨海新区土壤含盐量在0.044%～3.644%范围内土水比1:5、1:1及饱和土浆土壤浸提液电导率与土壤含盐量的关系方程。

Based on characteristics of the salt-affected soils in Tianjin coastal area,160 salt-affected soil samples with different types were collected from various regions of Tianjin.The electrical conductivities and soluble salts contents of the soil extracts with different ratio of water to soil were determined.The relationship between soluble salt content determined by residue-drying method and the electrical conductivity in the soil extracts was studied.The results indicated that electrical conductivities of the soil extracts by using different ratio of water to soil had an extremely significant positive correlation with the total salinity of soil.Furthermore,the equations of relationship between electrical conductivities of 1：5,1：1 soil/water and saturated soil extracts and salt content were proposed within salt content range from 0.044% to 3.644% in Tianjin coastal area.