Effect of slope shape on soil aggregate stability of slope farmland in black soil region

• Published in: Frontiers in environmental science 2023-02, Vol.11
• Main Authors: Wang, Yuxian, Xu, Yingying, Yang, Huiying, Shen, Huibo, Zhao, Lei, Zhu, Baoguo, Wang, Jiangxu, Guo, Lifeng
• Format: Article
• Language: English
• Subjects: aggregate; Aggregates; Agricultural equipment; Agricultural land; Agricultural production; Agriculture; black soil; combined erosion; cultivated land with long gentle slope; Cultivated lands; Environmental science; Erosion control; Farms; Food security; Particle size; Plows; Precipitation; Rainfall; Rainstorms; Shape effects; slope length; Slope stability; Soil aggregates; Soil conditions; Soil erosion; Soil management; Soil nutrients; Soil stability; Soil structure; Stability analysis; Water conservation
• ISSN: 2296-665X; 2296-665X
• DOI: 10.3389/fenvs.2023.1127043

Slope erosion in the black soil region of Northeast China is complex and specific. In order to effectively control soil erosion and protect scarce black soil resources, it is necessary to reveal the law of soil erosion and the influence of basic units of soil structure on its erosion process. This paper used three treatments in the Le Bissonnais (LB) method to determine soil aggregate stability parameters and soil erodibility K values based on particle size composition. By establishing a mathematical fitting of the slope erosion rate along the slope length, it is found that the sinusoidal function fitting can better characterize the periodic law of the slope erosion rate of the long and gentle slope cultivated land in the typical black soil region. The research shows that the primary mechanism of black soil aggregate breakage is dissipation and mechanical disturbance, while the damage caused by clay expansion is the least.