鄂东南红壤水分运动参数与红壤性质的相关性

THE RELATION BETWEEN THE SOIL WATER MOVEMENT PARAMETERS AND THE RED SOIL PROPERTIES IN THE SOUTHEAST OF HUBEI PROVINCE

研究了鄂东南５种母质发育的红壤水分特征曲线、土壤水分扩散率，推导了土壤非饱和导水率。对试验资料进行了回归分析，得出了土壤水吸力（ ）与土壤含水量（θ）、土壤水分扩散率（Ｄ）与土壤水饱和度（Ｇ）、土壤非饱和导水率（Ｋ）与土壤水饱和度（Ｇ）的经验公式，并将参数与土壤性质进行了相关分析， －θ、Ｄ－Ｇ之间的参数与土壤性质关系很密切。实测的土壤饱和导水率与土壤通气孔隙度关系密切。

The soil water characteristic curve and the hydraulic diffusivity (D) of the red soil derived from five parent materials in southeast of Hubei province were studied.The unsaturated hydraulic conductivity(K) was computered. By the regressive analysis of experimental data the empirical relationships of -θ,D-G,K-G were given and by the regressive analysis of parameters of ψ-θ, D-G and the soil properties the relationships between the parameters of ψ-θ,D-G and some properties of the soils were very close(-soil water suction;θ-soil water content; G-soil water saturation degree). The relationship between saturated hydraulic conductivity by experimental measurement and aeration porosity were close.