华南红壤侵蚀中有机碳流失的水动力学机制及负荷估算研究

Rich in rainfall amount, thermal change condition, and special red soil erosion and carbon cycle is the basic core of red soil formation, occurrence and development. It is important for soil erosion control, soil degradation, restoration and ecological reconstruction in red soil region to discuss the process of organic carbon loss under southern red soil erosion. Studies on erosion and the carbon cycle in this area are still very weak. Strengthen these researches in the field, accumulate the related data and information, help to scientific evaluating soil erosion on greenhouse gas emissions, and assessing the impact of climate warming. It is also help to provide a certain amount of scientific theory support for the area environmental protection, energy saving, and low carbon. The object of this study is the hydraulic mechanism of soil organic carbon loss and an assessment for loss load on red soil erosion in south China. The method of indoor simulation combined with field investigation was used. To discuss the rule and hydraulic mechanism of soil organic carbon loss under this erosion condition, to reveal the influence of red soil erosion hydraulic characteristics of soil organic carbon loss, and to build the estimation method of soil organic carbon loss load are main task of this study. It can profoundly reveal the essence of soil organic carbon loss in erosion; can provide a certain theoretical guidance for the evaluation of the effect of regional soil organic carbon source. It can provide science and technology support for low carbon, environmental protection in south China.

丰富的水热条件、独特强烈的红壤侵蚀及碳循环过程是红壤形成、发生与发展的基本核心与动力，对于华南红壤侵蚀下的有机碳流失过程的深入探讨是进行红壤地区水土流失整治、土壤退化恢复与生态重建的基础。至今华南红壤侵蚀区关于侵蚀与碳循环研究还十分薄弱，加强该领域的科学研究，积累相关的数据和资料，有助于科学评价土壤侵蚀对温室气体排放、气候变暖效应的影响，为该区乃至我国的环境保护、节能低碳提供一定的科学理论支撑。本研究针对华南红壤侵蚀区的土壤有机碳流失问题，拟采用室内模拟与野外调查相结合的方法，揭示华南红壤侵蚀下的土壤有机碳流失的水动力学规律及机理，揭示红壤侵蚀对土壤有机碳流失的动力学特征的影响，构建土壤有机碳流失负荷的估算方法，这既可深刻地揭示侵蚀过程中土壤有机碳流失的本质，也可为区域土壤有机碳储量的源汇效应评价提供一定的理论指导，进而为华南地区的低碳、环保提供科技支撑。

丰富的水热条件、独特强烈的红壤侵蚀及碳循环过程是红壤形成、发生与发展的基本核心与动力，对于华南红壤侵蚀下的有机碳流失过程的深入探讨是进行红壤地区水土流失整治、土壤退化恢复与生态重建的基础。至今华南红壤侵蚀区关于侵蚀与碳循环研究还十分薄弱，加强该领域的科学研究，积累相关的数据和资料，有助于科学评价土壤侵蚀对温室气体排放、气候变暖效应的影响，为该区乃至我国的环境保护、节能低碳提供一定的科学理论支撑。本研究针对华南红壤侵蚀区的土壤有机碳流失问题，拟采用室内模拟与野外调查相结合的方法，揭示华南红壤侵蚀下的土壤有机碳流失的水动力学规律及机理，揭示红壤侵蚀对土壤有机碳流失的动力学特征的影响，构建土壤有机碳流失负荷的估算方法，这既可深刻地揭示侵蚀过程中土壤有机碳流失的本质，也可为区域土壤有机碳储量的源汇效应评价提供一定的理论指导，进而为华南地区的低碳、环保提供科技支撑。