Effects of rye grass coverage on soil loss from loess slopes

作     者：Yuequn Dong Tingwu Lei Shuqin Li Cuiping Yuan Shumei Zhou Xiusheng Yang 

作者机构：College of Water Resources and Civil EngineeringChina Agricultural UniversityBeijing100083China Agricultural Clear Watershed GroupInstitute of Agro-environment and Sustainable DevelopmentCAASBeijing 100081China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess PlateauInstitute of Soil and Water ConservationChinese Academy of Science and Ministry of Water ResourcesYanglingShaanxi 712100China Beijing Grandtopeak Tianpinghang Land Plan and Design Co.Ltd.Beijing 100081China e School of Eonomics and ManagementHebei University of Science and TechnologyShijiazhuang050018China University of ConnecticutDepartment of Natural Resources and the EnvironmentStorrs 06269 United States 

出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)

年 卷 期：2015年第3卷第3期

页      面：170-182页

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：This research was financially funded by Science and Technique Development Foundation of the Yellow River Institute of Hydraulic Research(No.200651) the Foundation of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau(Grant no.10501-245) 

主　　题：Loess soil Rainfall simulation Slope Soil erosion Surface coverage 

摘      要：Vegetative coverage is commonly used to reduce urban slope soil *** experimental study on soil erosion under grass covered slopes is conventionally time and space *** this study,a new method is suggested to study the influences of vegetation coverage on soil erosion from a sloped loess surface under three slope gradients of 51,151,and 251;four rye grass coverages of 0%,25%,50%,and 75%;and three rainfall intensities of 60,90,and 120 mm/h with a silt-loamy loess *** grasses were planted in the field with the studied soil before being transplanted into a laboratory *** was allowed to resume growth for a period before the rain simulation *** showed that the grass cover reduced soil erosion by 63.90%to 92.75%and sediment transport rate by 80.59%to 96.17%under different slope gradients and rainfall *** sediment concentration/sediment transport rate from bare slope was significantly higher than from a grass-covered *** sediment concentration/transport rate from grass-covered slopes decreased linearly with grass coverage and increased with rainfall *** sediment concentration/transport rate from the bare slope increased as a power function of slope and reached the maximum value at the gradient of about 251,whereas that from grass-covered slope increased linearly and at much lower *** results of this study can be used to estimate the effect of vegetation on soil erosion from loess slopes.