中文摘要：

土壤饱和导水率反映了土壤的入渗性质，是研究水分在土壤中运动规律的重要水力参数。利用Guelph入渗仪测量了科尔沁地区樟子松林、灌木林和草地0-20cm、20-40cm和40-60cm三个不同土层深度的土壤饱和导水率，分析了这三种类型沙地土壤饱和导水率的差异及其随土层深度的变化特征。结果表明：1）平均土壤饱和导水率樟子松林较大，草地次之，而灌木林较小，它们的平均取值在0．63-12．50mm／min范围内；随土层深度增加，樟子松林土壤饱和导水率逐渐增大，而草地的逐渐减少，灌木林的随土层深度变化不大；2）樟子松林和灌木林土壤饱和导水率与容重显著负相关；灌木林和草地土壤饱和导水率与细沙百分含量显著负相关，而与中沙百分含量显著正相关；樟子松林和草地土壤饱和导水率与粗沙百分含量显著正相关。

英文摘要：

Soil saturated hydraulic conductivity （ Kfs ） is one of the important hydraulic parameters in soil physical processes. Kfs in Pinus var. mongolica woodland, shrubbery and grassland in Horqin Sand Land were meas- ured by Gueph permeameter. The results showed that （ 1 ） Kfs ranged from 0.63 to 12.50mm/min for these sands in study site, and indicated a tendency of the conductivity at Pinus var. mongolica woodland 〉 grassland 〉shrubbery ; depth, but nus var, mo at Pinus var. mongolica woodland showed a strong tendency to increase with increasing of soil for grassland it diminished with soil depth increase; Ffor shrubbery, it c woodland and shrubbery were significant negative related to bulk hanged minor; （2） Kfs at Pi- density; Kf, at shrubbery and grassland were significant negative related to percentage of fine sand, but significant positive related to percentage of middle sand; Kfs at Pinus var. mongolica woodland and grassland were significant positive related to percentage of coarse sand.