中文摘要：

为了探讨不同林龄人工柠条林对土壤渗透性能的影响,以天然草地为对照,以土壤初渗速率,稳渗速率,平均渗透速率和渗透总量表征土壤渗透性,运用主成分分析及散点聚类法对毛乌素沙地南缘不同林龄人工柠条（Caragana korshinkii）林地土壤渗透性进行了研究。结果表明：不同林龄人工柠条林地土壤渗透性能大小依次为：15a〉24a〉36a〉天然草地（CK）。即随着人工柠条林林龄的增加,其土壤渗透性能力逐渐减弱,对照天然草地的土壤渗透能力最小。不同林龄人工柠条林地土壤入渗过程回归模拟结果表明：土壤水分入渗过程符合Kostiakov模型,相关系数在0.8003～0.9535之间,且F检验均达到极显著水平。Kostiakov模型是比较适用于干旱、半干旱区的人工柠条林地土壤入渗特征的模型。。

英文摘要：

Applying principal component analysis （PCA） and splashes cluster analysis, soil infiltration characteristics of Caragana Korshinkii plantation with different ages in south edge of Mu Us Sandy Land were studied. The results showed that soil infiltration characteristics of Caragana Korshinkii plantation varied with ages and soil layers. The scores of soil infiltration characteristics obtained by principal component analysis were in the following order： 15a 〉 24a 〉 36a 〉 natural meadow. The regression analog result of the soil water infiltrating processes of Caragana Korshinkii plantation with different ages indicated＇ that Kostiakov equation simulated the water infiltrating processes very well, the correlation coefficient （ R2 ） was between 0. 8003 and 0.9535, and F test reached significant level.