北亚热带次生栎林与火炬松人工林土壤碳动态研究的开题报告.docx

北亚热带次生栎林与火炬松人工林土壤碳动态研究的开题报告 【摘要】 近年来，土壤碳动态研究成为全球环境变化的热门研究领域之一。本研究以广西北海市某野外观测站为研究对象，比较分析了北亚热带次生栎林和火炬松人工林土壤有机碳含量、碳密度、分布特征和土壤碳汇潜力等指标，探讨了人类干预对土壤碳贮量的影响。研究表明，与人工林相比，次生栎林土壤有机碳含量和碳密度较高，而人工林土壤碳汇潜力更大。此外，干扰程度不同的土层在土壤碳动态中扮演着不同的角色，并且人类活动对土壤有机碳短期和长期的影响也不尽相同。因此，在保护生态系统功能的同时，考虑到经济社会发展的需要，应适当进行人类干预。 【关键词】 北亚热带，土壤碳动态，次生栎林，火炬松人工林，土壤有机碳，碳密度，碳汇潜力 【Abstract】 In recent years, soil carbon dynamics research has become one of the hot research areas of global environmental change. In this study, a wild observation station in Beihai city, Guangxi province was selected as the research object, and the organic carbon content, carbon density, distribution characteristics and soil carbon sink potential of secondary oak forest and Pinus kesiya var. langbianensis plantation were compared and analyzed, and the impact of human intervention on soil carbon storage was discussed. The results showed that compared with the plantation, the secondary oak forest had higher soil organic carbon content and carbon density, while the soil carbon sink potential of plantation was greater. In addition, different disturbed soil layers played different roles in soil carbon dynamics, and the short-term and long-term effects of human activities on soil organic carbon were also different. Therefore, while protecting the ecological system function, human intervention should be appropriate considering the needs of economic and social development. 【Keywords】 North subtropical, soil carbon dynamics, secondary oak forest, Pinus kesiya var. langbianensis plantation, soil organic carbon, carbon density, carbon sink potential