土壤持水特征测定中的容重变化及其确定方法  

Bulk density changing during measuring soil water retention characteristics and its determining method

作　　者：吕殿青[1] 邵明安[1] 王全九[2] 

机构地区：[1]中科院水利部水土保持研究所,陕西杨陵712100 [2]中科院地理科学与资源研究所,北京100101

出　　处：《水利学报》2003年第3期110-114,119,共6页Journal of Hydraulic Engineering

基　　金：国家重点基础研究发展规划(G2000018605);国家自然科学基金重大研究计划(90102012)项目资助

摘　　要：利用离心机法测定了黄土高原6种典型质地土壤的吸力、容重和重量含水量三者的关系,分析了土壤持水特征测定中的容重变化特征;借用土壤水分特征曲线幂函数模型和土壤收缩特征线性模型获得容重与吸力间幂函数关系,并利用试验资料进行检验;提出了确定土壤持水特征测定中容重变化的三点法,该方法所获得土壤水分特征曲线与实测结果极为吻合,精度较高。Relationship among weight content,suction and bulk density was measured by using centrifugal method for six types of soils ranging from sand to silt clay loam.The power function between bulk density and suction was derived on the basis of power model of soil water retention characteristics and linear model of soil shrinkage characteristics and also proved with measured data.The three points method determining bulk density during measuring soil water retention characteristics was put forward.Soil water characteristic curve obtained by the three points method was matched with measured data well and its precision was high.

关 键 词：上壤持水特征 容重 离心机法 三点法 黄土高原 容重 含水量 

分 类 号：S152.7[农业科学—土壤学]