分析了盐渍化土壤导电性的决定因子,提出松嫩平原苏打盐渍化土壤的电导率主要由土壤溶液中Na+和HCO₃^-离子的总电荷数和迁移速率决定;而土壤中粘土矿的含量会因外在环境条件(土壤含水率)的变化而影响土壤的电导率,其是针对不同的土壤物理特征对测量仪器进行校正的理论依据.简述了利用电磁技术进行盐渍化土壤电导率测量的技术原理,探讨了不同深度土壤电导率测量数据的提取方法,在此基础上,对不同类型土壤的测量结果与典型剖面调查结果进行对比分析,认为该技术具有快速、稳定、准确、实用的特点,利用这项技术可以对大面积不同深度土壤盐渍化情况进行快速测量,并对从事田间实验研究有重要的指导意义.

The factors that determine conductivity of sodium-saline soil are analyzed. It is pointed out that the conductivity of sodium-saline soil in the west of Songnen Plain is mainly determined by the total charge of Na⁺ and HCO₃^- and transferred speed of them in the soil solutions. Furthermore, the content of clay mineral in soil can affect the conductivity because of different environmental conditions, such as ratio of soil moisture, which is the theoretic foundation to adjust the instrument according to different soil physical character. The theory by electromagnetism technology to survey the conductivity of sodium-saline soil is viewed, and the gaining method of conductivity data in different depths of soil is probed. Moreover according to above research, we contrasted the surveying results of analysis in laboratory for the conductivities of different types of soil section. Generally, electromagnetism technology can quickly, steadily, accurately survey the conductivity of sodium-saline soil in the field, and it has important guidance meaning to explore soil characteristics in the field.