Influence of Soil Erosion on Soil Properties of Black Soil Bank Farming

The black soils is the main farming soil in northeast China,the influence of its structure and character on soil productivity is prodigious.The fertile black soil is becoming thinner and thinner because of soil erosion,the physicochemical characters of soil are destroyed and affected in varying degrees.According to the actuality of soil erosion,the determination and analysis which includes the slope farmland nutrient condition of black soils in varying erosion degrees and the field moisture capacity and infiltration velocity,as well as the index of against corrosion and impact resistant show: with the aggravation of the black soil erosion degree,the soil organic content and the against corrosion and impact resistant of soil will become lower and lower,at the same time,the storage and seepage capacity of soil will minish gradually.The aggravation of soil erosion degree in the the black soil slope farmland result in that soil organic content decreases,the capacities of preservation and supply fertilizer reduces,the soil viscosity increase and the structure becomes inferior,water retaining capacity lower,making an impact on the growth of crops,which certainly will compose the grave threat to the important status of commodity grain base of the black soil region of northeast China.