Study on the Characteristics of Soil Organic Carbon Changes in Coal Mining Subsidence Slopes in Coal Mining Areas
In order to explore the impact of coal mining subsidence on soil organic carbon content,this paper ana-lyzed the differences in soil Total Organic Carbon(TOC)content at the top,middle,bottom of the subsidence slope and farmland in the control area of the coal mining area,and the variation characteristics of soil organic car-bon content at different slope positions and depths of the subsidence slope.The results showed that the mean val-ue of soil organic carbon content in the subsidence slope was significantly lower than that in the farmland in the control area by 17％(P＜0.05),and the overall spatial variability of soil organic carbon content in the subsidence slope was greater.The soil organic carbon content of soil profiles at different slope positions of the subsidence slope and the control area generally showed a gradual decrease trend with increasing soil depth.The mean change of soil organic carbon content between different slope positions of the subsidence slope was generally the lowest at the top,the highest in the middle,and the lowest at the bottom.The spatial variation of soil organic carbon con-tent in the subsidence slope of the coal mining area is related to the soil erosion caused by surface collapse,and soil erosion has different effects on the loss of soil organic carbon at different positions and depths.
万方数据
维普
