A soil quality index for evaluation of degradation under land use and soil erosion categories in a small mountainous catchment, Iran

作     者：Kazem NOSRATI Adrian LCOLLINS 

作者机构：Department of Physical GeographySchool of Earth SciencesShahid Beheshti University*** TehranIran Sustainable Agriculture Sciences DepartmentRothamsted ResearchNorth WykeOkehamptonEX202SBUK 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2019年第16卷第11期

页      面：2577-2590页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 09[农学] 090301[农学-土壤学] 0303[法学-社会学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0705[理学-地理学] 0815[工学-水利工程] 0903[农学-农业资源与环境] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0704[理学-天文学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：funded by a grant from the research council of Shahid Beheshti University,Tehran,Iran(Grant No.600.4452) supported by strategic funding from the UK Biotechnology and Biological Sciences Research Council(BBSRC grant BBS/E/C/000I0330 Soil to Nutrition) 

主　　题：Soil quality index Land use Erosion status Soil enzyme activities Multivariate statistical techniques 

摘      要：Soil erosion and land use type have long been viewed as being particularly important drivers of soil *** objectives of this study,therefore,were to select a new soil quality index(SQI)which varies significantly with land use/soil erosion,and to evaluate the new SQI using expert *** total,18 soil physical,chemical,and biochemical properties(indicators)were measured on 56 soil samples collected from four land use/soil erosion categories(rangeland/surface erosion,rangeland/subsurface erosion,cultivated land/surface erosion and dry-farming land/surface erosion).Principal component and classification analysis(PCCA)identified five PCs that explained 77.7%of the variation in soil properties with the biochemical PC varying significantly with land use/soil *** discriminant analysis(GDA)selected urease and clay as the most sensitive properties distinguishing the land use/soil erosion *** GDA canonical scores for the new SQI were significantly correlated with expert opinion soil surface summed scores(for soil movement,surface litter,pedestalling,rills and flow pattern)derived using the *** of the Interior Bureau of Land Management(BLM)method.A forward stepwise general regression model revealed that the new SQI values were explained by soil movement,surface litter,and the summed values of the soil surface ***,this study confirmed that soil quality in the study area in Iran is controlled by land use and corresponding soil erosion.