土壤学报2013，Vol.50Issue(3)：469-477,9.
科尔沁不同沙地土壤饱和导水率比较研究
A COMPARISON OF SOIL SATURATED HYDRAULIC CONDUCTIVITY(KFS)IN DIFFERENT HORQIN SAND LAND
摘要
Abstract
In situ measurements with a Guelph Permeator were performed to investigate the saturated hydraulic conductivity of soils (Kfs) at various desertified sand lands,such as grassland,fixed sand dune and mobile sand dune of Horqin Sand Land.Based on analyzing the relationships of Kfs with the sand land types,soil depths,slope position of sand dunes and soilphysical and chemical properties,the results indicated that:(l) The average Kfs increased in the order:grassland (potential desertification),fixed sand dune (light desertification) and mobile sand dune (serve desertification),and the value was 2.15,4.79 and 5.89 mm min-1,respectively.That was,the more serious desertified,the higher infiltration capacity.A statistically significant differences (p ＜ 0.05) in Kfs were found among the three sites and between the slope positions of the two dunes.So,the Kfs at Horqin Sand Land has showed a higher heterogeneity ; (2) The changes of Kfs was considerably with the increase of soil profile depths.The changes of Kfs with soil depths at grassland could be fitted with parabola models,and for fixed sand dune by exponential models; (3) The stepwise regression revealed that the soil organic matter content,the fine sand fraction (0.1 ～ 0.05 mm) and the clay and silt content (＜ 0.05 mm) were some key factors affecting Kfs with a significantly negative relationship,but there was a significantly positive correlation with the coarse sand fraction (2 ～ 0.1 mm).关键词
饱和导水率/沙漠化/科尔沁沙地Key words
Saturated hydraulic conductivity/Desertification/Horqin Sand Land分类
农业科技引用本文复制引用
姚淑霞,赵传成,张铜会..科尔沁不同沙地土壤饱和导水率比较研究[J].土壤学报,2013,50(3):469-477,9.基金项目
国家重点基础研究发展规划项目(973计划)(2009CB421303)、国家科技支撑计划项目(2011BAC07B02)资助 （973计划）
