中文摘要：

关于土壤生产率上的土壤侵蚀的效果的研究吸引了增加的注意。紫色土壤是在中国的主要土壤类型之一并且在国民经济起一个重要作用。然而，在侵蚀之间的关系和紫色土壤的生产率一直不是学习的井。这研究的目的是决定土壤深度，依赖于侵蚀的率，是否在庄稼产量和生长上有影响。在不同土壤深度的情节和壶实验被执行。结果显示从不同父母材料的土壤由于导出的土壤的微分富饶有不同生长特征和庄稼收益。收益减小率与侵蚀的土壤(侵蚀的水平) 的深度指数地增加。收益减小率为玉米和小麦每统一侵蚀的土壤地平线(10 厘米) 是约 10.5% 。

英文摘要：

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.