摘要
土壤有机碳库是全球碳循环的重要组成部分,其积累和分解的变化直接影响全球的碳平衡。理解土壤有机碳蓄积过程对生物、物理和人为因素的响应,把握关键的控制因子是准确预测土壤有机碳在全球变化情景下对大气CO2的源/汇方向及准确评估碳收支的关键。综述了土壤有机碳主导影响因子的研究进展,并针对陆地碳循环特点,提出未来土壤有机碳研究应加强土壤有机碳过程与状态的定量化、土壤有机碳分解对环境因子的敏感性、氮沉降对土壤有机碳的影响、土壤有机碳对气候变率的响应及其反馈作用,以及土壤有机碳动态的综合模拟5个方面的研究,为准确评估陆地碳收支提供依据。
Soil organic carbon (SOC) is an important component of the global carbon cycle, and it has direct effects on the global carbon balance. Better understanding of the controlling factors of SOC and how SOC may respond to environmental changes are important to the accuracy for predicting the consequences of SOC under global change and evaluating the carbon budget. In this paper, the effects of climate, atmospheric composition, vegetation, soil property, land use and management practices on soil organic carbon (SOC) are presented. Based on this, some important tasks are also proposed, including 1 quantifying processes and states of SOC; 2 determining the controlling factors; 3 the effects of nitrogen deposition on SOC; 4 the responses and feedback of SOC to climate variability; and 5the synthetic simulating SOC dynamics.
出处
《地球科学进展》
CAS
CSCD
北大核心
2005年第1期99-105,共7页
Advances in Earth Science
基金
中国科学院知识创新工程重大项目"中国陆地和近海生态系统碳收支研究"(编号:KZCX1 SW 01 12)
国家自然科学基金重点项目"中国东北样带典型生态系统碳循环的过程与机理"(编号:40231018)资助.
