Effect of Rock Strata Dip on Soil Detachment Capacity of Different Land Use Types in Karst Trough Valley Area

[Objective] This study aimed to explore the influence mechanism of rock strata dip on soil erodibility and provide references for preventing and controlling water and soil erosion in karst trough valley area. [Methods] The study focused on the dip/anti-dip slope of Qingmuguan karst trough valley area in Chongqing city. Through flume erosion experiments, we analyzed the differences in soil erodibility between different land use types on the dip/anti-dip slopes and investigated the impact of soil physicochemical properties on soil erodibility. [Results] (1) Both dip/anti-dip slopes showed a significant negative correlation with organic matter content, >0.25 mm water-stable aggregates content, and total nitrogen content (p0.25 mm water-stable aggregate content, and total nitrogen compared to the dip slope. (2) Soil erodibility was higher on the dip slope than on the anti-dip slope for all four land use types studied. Additionally, gras