重庆市四面山不同土地利用类型饱和导水率  

Saturated Hydraulic Conductivity of Different Land Use Types in Simian Mountain of Chongqing City

作　　者：阮芯竹 程金花[1] 张洪江[1] 杜士才 李世友 张福明 王贤[1] 陈晓冰[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]重庆市林业局,重庆401147 [3]重庆市四面山镇人民政府,重庆402296 [4]重庆市四面山森林资源管理局,重庆402296

出　　处：《水土保持通报》2015年第1期79-84,共6页Bulletin of Soil and Water Conservation

基　　金：国家林业局推广项目"三峡库区低山丘陵区水土保持型植物群落建设技术"([2012]42);国家自然科学资助项目(41271300;30900866)

摘　　要：[目的]探讨不同土地利用类型和土壤理化性质对饱对导水率的影响。[方法]采用定水头法测定四面山不同土地利用类型的饱和导水率,并运用回归分析,相关分析和主成分分析法分析其与土壤物理因子和有机质的关系,以及影响饱和导水率的主导因子。[结果]各土地利用类型的平均饱和导水率均高于荒地,其顺序为:林地>农地>草地,林地中天然林饱和导水率大于人工林;饱和导水率随土层深度的增加呈负指数递减规律;饱和导水率与容重呈幂函数关系,与孔隙度呈正相关,与黏粒含量呈负相关;有机质含量的提高对饱和导水率有积极的促进作用。[结论]影响饱和导水率的主导因子是容重、有机质、非毛管孔隙度和毛管孔隙度,其次,土壤机械组成对其也有一定影响。[Objective] The research focuses on the effect of the different land use types and soil physicochemi- cal properties on saturated hydraulic conductivity, [Methods] The constant-hydraulic head method was used to measure soil saturated hydraulic conductivity（K,） for different land use types in Simian Mountain of Chongqing City. Regression analysis, correlation analysis and principle component analysis was used to analyze the relationship between K, and soil physical factors and organic matter. [Results] The K, was the lowest in wasteland, and the descending order was： forest land 〉 farmland〉 grassland. The K, in natural forest was higher than that in artificial forest, and it was negative exponential declined with the increase of the soil depth. There was a power function relationship between Ks and unit weight, and Ks was positively related to soil porosity and negatively related to clay content. The increase of organic matter could improve the K,. [Conclusion] The unit weight, organic matter, non capillary poropsity and capillary poropsity are the main factors that influence Ks. Besides, soil mechanical composition also has some impact on Ks.

关 键 词：土地利用类型 饱和导水率 物理因子 有机质 四面山 

分 类 号：S157[农业科学—土壤学] S152.5[农业科学—农业基础科学]