A Quantification of the Effects of Erosion on the Productivity of Purple Soils  

作　　者：ZHAO Li JIN Jie DU Shuhan LIU Gangcai 

机构地区：[1]Key Laboratory of Mountain Hazards and Earth Surface Processes,ChineseAcademy of Science,Chengdu 610041,China [2]Institute of Mountain Hazards and Environment,Chinese Academy ofScienc,Chengdu 610041,China [3]Graduate University of the Chinese Academy of Sciences,Beijing 100049,China [4]Research Institute of Tropical Eco-agricultural Science,Yunnan Academy of Agricultural Sciences,Yuan mou 651300,China

出　　处：《Journal of Mountain Science》2012年第1期96-104,共9页山地科学学报（英文）

基　　金：the National Natural Science Foundation Committee (Grant No.40971168);the National 973 Program(2007CB407206)

摘　　要：Research on the effects of soil erosion on soil productivity has attracted increasing attention.Purple soil is one of the main soil types in China and plays an important role in the national economy.However,the relationship between erosion and the productivity of purple soils has not been well studied.The purpose of this research was to determine if soil depth,which is dependent on the rate of erosion,has an influence on crop yield and growth.Plot and pot experiments at different soil depths were performed.Results indicate that soils from different parental materials had different growth features and crop yields due to the differential fertility of the derived soils.The yield reduction rate increases exponentially with the depth of eroded soil(level of erosion).The yield reduction rate per unit eroded soil horizon(10 cm) is approximately 10.5% for maize and wheat.

关 键 词：Purple soil Erosion Productivity Impact characteristics China 

分 类 号：S15[农业科学—土壤学] S157.1[农业科学—农业基础科学]