摘要
利用EM38型电磁感应电导仪(EM38)在野外原位测定土壤电磁感应电导率(EM),是一种快速简便测定土壤含盐量的新方法。将EM38水平放置在地表以上不同高度,仪器EM读数随高度的变化与不同深度土层的盐分含量分布有关。室内用电导法测定不同深度土层土壤水浸液(水:土=5:1)的电导率(EC)。两种电导率(EM和EC)之间的相关分析表明,地面不同高度EM与不同深度土层EC具有显著相关性。根据EM建立了EC的回归方程,代入相应的EM值即可求出不同深度土层的EC和含盐量。
Determining soil electromagnetic induction conductivity (EM) in situ with EM38 is a new and convenient method for rapid determination of soil salt content. Deposing EM38 horizontally at different heights above the ground, the variation of EM readings has a relation to the salt contents in different depths of soil layer. Electric conductivity (EC) is also determined by electric conduction method in laboratory with soil water extracts (water: soil=5: 1). Correlation analysis shows that EM readings at different heights above the ground have a significant correlation to EC reading at different depths of soil layer. Regression equations for EC are established based on EM values, and inserting corresponding EM values, the EC values and salt contents in different depths of soil layer can be solved.
出处
《应用生态学报》
CAS
CSCD
1993年第3期289-294,共6页
Chinese Journal of Applied Ecology
基金
国家自然科学基金
关键词
电磁感应
电导率
盐含量
土壤
Electromagnetic induction conductivity (EM), Electric conductivity (EC), Salt content.
