水土保持研究2025，Vol.32Issue(1)：39-47,9.DOI:10.13869/j.cnki.rswc.2025.01.011
青藏高原—黄土高原过渡带土壤抗冲性及影响因素
Soil anti-scourability and influencing factors in the transition zone between the Qinghai-Xizang Plateau and Loess Plateau
摘要
Abstract
[Objective]The aims of this study are to explore soil anti-scourability and influencing factors,and to provide a scientific basis for soil erosion prevention and ecological construction in the transitional zone between the Qinghai-Xizang Plateau and Loess Plateau.[Methods]In the upper,middle and lower reaches of the Shagou River Basin in Hainan Xizangan Autonomous Prefecture,Qinghai Province(sample plots 1,2 and 3),typical chestnut soil and aeolian sandy soil were selected.The undisturbed soil scouring method(2,3,4,5 and 6 L/min)was used to test the soil anti-scourability.The responses of soil anti-scourability to various factors such as soil physicochemical properties and hydrodynamic conditions were studied.The soil anti-scourability equation was constructed accordingly.[Results]The scouring intensity of three plots showed the maximum,and then decreased and then flattened,and the soil anti-scourability showed an order:sample plot 1＞sample plot 3＞sample plot 2,and the runoff sediment content decreased as a power function with the scouring duration.There were significant differences in soil physical and chemical properties among the three plots,and soil anti-scourability was significantly correlated with bulk density,WSA＞0.25mm,organic matter,and mean weight diameter.Relationships of shear stress and soil anti-scourability were well fitted by power function(R2＞0.98,p＜0.05).Based on the comprehensive consideration of dynamics and resistance for soil erosion,the soil anti-scourability equation was constructed based on main factors of shear stress,mean weight diameter and organic matter.[Conclusion]Anti-scourability of chestnut soil is better than aeolian sandy soil.The soil anti-scourability equations based on the mean weight diameter and shear stress,organic matter and shear stress,and mean weight diameter,organic matter and shear stress all fit well.关键词
青藏高原—黄土高原过渡带/土壤抗冲性/理化性质/径流剪切力Key words
Qinghai-Xizang Plateau-Loess Plateau transitional zone/soil anti-scourability/physicochemical properties/shear stress分类
农业科技引用本文复制引用
杜芳悦,刘俊娥,牛百成,朱启明,崔钦凯..青藏高原—黄土高原过渡带土壤抗冲性及影响因素[J].水土保持研究,2025,32(1):39-47,9.基金项目
青海省自然科学基金(2022-ZJ-942Q) （2022-ZJ-942Q）
国家自然科学基金项目(42077058,42107372) （42077058,42107372）
中央高校基本科研业务费项目(GK202309005) （GK202309005）
