1.Institute of Soil and Water Conservation,CAS & MWR,712100,Yangling,Shaanxi;2.Graduate School of the Chinese Academy of Sciences,100049,Beijing;3.Institute of Agriculture Science,Xi'an,710061,Xi'an;4.Institute of Soil and Water Conservation,Northwest Sci-tech University of Agriculture and Forestry,712100,Yangling,Shaanxi:China
Abstract：The study result on soil anti-erodibility in Wuqi County,Shaanxi Province,a national experiment site for conversion from cropland,into forest land and grassland showed that all the 12 anti-erodibility indexes can be divided into 4 categories,i.e.inorganic clay,aggregate,inorganic colloid and water-stable aggregate,capable of reflecting 88.671% of the information of the eigenvalues,by means of PCA.All the plant communities in Wuqi County can be clustered into three kinds based on the four categories with the Hierachical Cluster Method.The first kind with good anti-erodibility mainly includes forest land and grassland from cropland with a long removal time,and the second kind with medium anti-erodibility is composed of Artemisia,where as the third with poor anti-erodibility is made up of newly forest land and grassland removed from cropland and the cropland.The anti-erodibility of artificial forests is getting stronger and stronger as the forest ages,approaching that of natural forests.
张振国1,2；范变娥3；白文娟1,2；焦菊英1,4. 黄土丘陵沟壑区退耕地植物群落土壤抗蚀性研究[J]. 中国水土保持科学, 2007, 5(1): 7-13.
ZHANG Zhen-Guo-；Fan-Bian-E-；Bai-Wen-Juan-；Jiao-Ju-Yang. Soil anti-erodibility of plant communities on the removal lands in hilly-gully region of the Loess Plateau. SSWCC, 2007, 5(1): 7-13.
2007, Vol. 5 
