Effects of grassland vegetation restoration on soil saturated hydraulic conductivity in mountain area of southern Ningxia

Studying on soil saturated hydraulic conductivity(Ks) characteristics of different measurements for vegetation restoration in mountain area of southern Ningxia will provide scientific basis for evaluating different measurements for vegetation restoration and discussing mechanism.There measurements for vegetation restoration were beneficial to improve K_s.K_s on 0-5 cm were improved most obviously.Values of K_s quickly reduced with depth under different communities.K_s was directly affected by soil organic matter(SOM) and capillary porosity.There was linear correlation between SOM and K_s in three measurements for vegetation restoration.The higher the content of SOM,the faster K_s increase.The accumulation of SOM was driving force for K_s. So enclosed meadows was the best measure for improvement of K_s and eclolgical restoration.