黑河上游草地土壤水分特征曲线研究  

The soil-water characteristic curve for grassland stand in upstream region of Heihe River

作　　者：李广文[1,2] 冯起[1,3] 张福平[1] 成爱芳[3] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062 [2]齐齐哈尔大学理学院,齐齐哈尔161006 [3]中国科学院寒区与旱区环境工程研究所,兰州730000

出　　处：《干旱区资源与环境》2015年第10期128-134,共7页Journal of Arid Land Resources and Environment

基　　金：国家科技支撑项目(2012BAC08B07);中国博士后科学基金(编号:2011M501496);陕西师范大学中央高校基本科研业务费专项资金项目(编号:GK201101002)资助

摘　　要：采用离心机测定土壤水分特征曲线,分析黑河上游草地土壤持水特征。结果表明:研究区土壤持水能力变化大,与粉粒、含水量、容重和紧实度相关关系明显。对土壤特征曲线进行拟合,呈现出很好的幂函数曲线;通过均方根误差和误差的平方和分析,结果显示拟合效果好;模拟方程的系数a、b分别与饱和含水率、土壤失水率呈正相关关系。The soil moisture feature curve was evaluated by using centrifuge,and the soil- water characteristics of the grassland in Heihe River upstream region were analyzed. The results showed that the change of the soil water- holding capacity was big in the study area. The correlations between the water- holding capacity and silt,water content,unit weight and compactness were obvious. The soil- water characteristic curve was a good power function curve by fitting. The root mean square error and the sum of the squares of the error analysis results showed that the fitting effect was good. It was positively related between simulation equations coefficients a and the saturated moisture content; coefficients b and soil water loss rate had the same relationship too.

关 键 词：土壤水分特征 饱和含水率 土壤失水率 黑河 

分 类 号：S152.7[农业科学—土壤学]