泥沙研究2025，Vol.50Issue(3)：1-8,8.DOI:10.16239/j.cnki.0468-155x.2025.03.001
黄土区典型流域土壤有机碳空间分布特征分析
Analysis of spatial distribution characteristics of soil organic carbon in typical watersheds in loess areas
摘要
Abstract
In order to reveal the spatial distribution characteristics of soil organic carbon components under the action of soil and water conservation measures,based on the measured data of nuclide 137Cs and organic carbon components from typical watersheds at the National Field Scientific Observation and Research Station of Forest Ecosystems in Jixian County,Shanxi Province,the spatial distribution pattern of organic carbon components in the erosion-deposition area and its correlation with the erosion modulus has been analyzed.The results show that the average content of total organic carbon in the erosion area is relatively low(5.45 g/kg),and the slope orientation is the main influencing factor of the proportion of organic carbon components.After the implementation of soil and water conservation measures,the content of organic carbon components in the 20-30 cm soil layer is better correlated with the erosion modulus,with significant correction(p＜0.05)of the coarse and fine particle organic carbon content and erosion modulus,and the difference of the organic carbon components is smaller.However,the organic carbon component content in the sedimentary area decreases,which is significantly influenced by the sources of sediment and the mineralization of organic carbon.The research findings are of great significance for understanding the changes in soil organic carbon driven by both natural and anthropogenic factors,and they provide a basis for ecological management on enhancing carbon sequestration benefits in soil and water conservation efforts.关键词
水土保持措施/有机碳组分/侵蚀模数/相关分析Key words
soil and water conservation measures/organic carbon components/erosion module/correlation analysis分类
农业科技引用本文复制引用
韩晓,张永娥,张晓明..黄土区典型流域土壤有机碳空间分布特征分析[J].泥沙研究,2025,50(3):1-8,8.基金项目
国家自然科学基金项目(52379082) （52379082）
