Characteristics of Soil Erosion in Bare Slope Land of Black Soil Re-gion in Northeastern China
A combination of field experiments and indoor analysis was used to continuously monitor and analyze the amount of soil erosion and soil physicochemical properties of bare slope land in the black soil region of Northeast China from 2012 to 2018.The results showed that:the annual soil ero-sion was significantly affected by erosive precipitation and runoff times of years and months,and there was a significant regression relationship between runoff,sediment yield and erosive rainfall,runoff times,respectively.In 2012 and 2013,times of runoff producing were the highest,and the an-nual runoff amount and sediment amount were also the largest,being 3.77×104 and 2.97×104 m3/km2,228.92×104 and 271.59×104 m3/km2,respectively.Times of runoff production and the annual flow were the least in 2016.The amount of sediment production was the smallest in 2018.The distribution of monthly runoff production and sediment yield in different years were similar as erosive precipita-tion and runoff times,and the hazard in earlier monsoon was higher than other periods.There was a significant positive regression relationship between soil organic carbon content,total nitrogen and phosphorous content,porosity and soil erosion,while bulk density was negative.Soil organic matter,total N and total P of the experimental plot decreased first and then tended to be stable with the in-crease of erosion years,and the decreasing range reduced year by year.Erosion time had a great ef-fect on the degradation of soil structure and fertility on slope land.The results will provide useful ref-erence for further revealing the law of soil erosion on black soil slope land,constructing soil and wa-ter conservation measures,and improving land quality.
black soil region in Northeast Chinabare slope landsoil erosionfertility
万方数据
维普
