红壤丘陵区小流域土壤侵蚀对土壤有机碳再分布及其通量的影响规律研究

项目名称： 红壤丘陵区小流域土壤侵蚀对土壤有机碳再分布及其通量的影响规律研究

项目编号： No.41271294

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 李忠武

作者单位： 湖南大学

项目金额： 75万元

中文摘要： 从小流域尺度，全面考虑土壤侵蚀对土壤有机碳再分布和输出过程影响及其对土壤碳通量过程影响的研究是探究土壤碳循环的关键科学问题之一，但是目前相关研究多侧重于通过小区或田间试验来开展土壤再分布及其有机碳水平向和垂向通量过程的研究。本项目以湖南省邵阳市水土保持研究所内红壤丘陵区典型小流域作为研究对象，采用野外微型径流小区模拟降雨实验、坡面径流小区定位观测实验、小流域野外调查采样实验，结合核素复合示踪技术和地理信息系统（GIS）等信息技术，通过研究土壤侵蚀对土壤有机碳流失过程的影响，小流域土壤侵蚀对土壤有机碳再分布格局的影响，小流域土壤侵蚀对土壤有机碳流域输出的影响以及小流域土壤侵蚀对土壤有机碳通量的影响，揭示红壤丘陵区小流域土壤侵蚀对土壤有机碳再分布及其通量的影响规律，从而为探讨土壤侵蚀影响土壤有机碳迁移及通量的变化机制提供一定的理论基础，也为红壤丘陵区减少碳排放政策的制定提供依据。

中文关键词： 土壤侵蚀；碳流失；再分布特征；稳定性；核素示踪

英文摘要： The research on soil erosion impacting soil organic carbon restribution and export and its effect on soil carbon flux process in small catchments scale is one of vital Scientific problems for exploring soil carbon cycle. While, the related researchs are foucused on soil organic carbon redistribution and its lateral and vertical flux process from plot scale. In the project, a typically small catchments of Red soil Hilly Region located in the Soil and Water Conservation Institue of Shaoyang City of Hunan Province will be selected as the study site, And field artificial simulation rainfall test in micro-plot, site-observation test in slope runoff plot, field investigation and sample test in small catchments, integrated with isotopic multiple tracing method and information technology(Geographic information system, GIS) will be carried.The research content include the rule on soil erosion impacting the loess process of soil organic carbon, the effect of soil erosion on redistribution of soil organic carbon, of soil eron on export of soil organic carbon, of soil erosion on the soil organic carbon flux in the small catments. The project objective is to disclose the rule of soil erosion affecting soil organic carbon redistribution and soil organic carbon flux in red soil hilly region , which can provide some theory base

英文关键词： soil erosion；carbon loss；redistribution property；stability；isotopic tracing