土壤凋萎系数的影响因素研究

Study on the influence factors of wilting point

基于清徐大田土壤试验研究了土壤的凋萎系数与其土壤物理性粘粒含量、有机质含量以及土壤全盐含量之间的关系。研究结果表明土壤凋萎系数随着土壤物理性粘粒含量的变大而变大,且两者较好地符合线性关系;土壤凋萎系数随着土壤有机质含量的变大而变大,且两者较好地符合对数关系;土壤凋萎系数随着土壤全盐含量的增加而增大,且两者较好的符合对数关系。本研究对农业生产凋萎系数的确定具有重要意义。

The relation between the wilting point with the soil physics characters as clay content, organic matter content and the salt content have been studied based on the experiments in field. The research results have shown that the soil wilting point increased with the clay content increased, and the relationship between two sides conformed a good linear relation. The wilting point increased with the organic matter content increased, and the relationship between them conformed to logarithm function. The wilting point increased while the salt content increased, and the relationship between them conformed to logarithm function too. This study has important significance for determining the wilting point in agricultural praduction.