土壤碳排放组分区分的研究进展

发布时间：2018-02-15 02:32

本文关键词： 全球变暖土壤有机碳土壤呼吸激发效应　出处：《生态学杂志》2017年08期 　论文类型：期刊论文

【摘要】：土壤呼吸作为全球碳循环的一个重要组成部分,是理解地下碳排放过程与土壤有机碳稳定性的关键环节。然而,土壤呼吸是由不同组分构成,目前对有关土壤呼吸的许多关键术语尚存在理解片面和使用不当问题,阻碍了相关土壤碳循环的研究进程。本文针对此现状,分别从土壤呼吸各组分所利用的碳源、产生的部位与途径等方面综合分析了国内外土壤碳排放的研究进展及对陆地生态系统地下碳排放过程的认知,并对所涉及的相关术语进行梳理与界定。在此基础上,阐释了土壤呼吸各组分对大气CO_2浓度的贡献及其对全球变暖的响应;结合当前有关土壤碳循环的研究热点,强调了区分陆地生态系统土壤呼吸各组分的必要性与生态重要性,指出深入研究根际激发效应发生机制是破译未来生态系统地下碳循环过程的关键。
[Abstract]:Soil respiration, as an important component of the global carbon cycle, is a key link in understanding the process of underground carbon emissions and the stability of soil organic carbon. However, soil respiration is composed of different components. At present, there are still some problems in understanding and improper use of many key terms related to soil respiration, which hinder the research progress of soil carbon cycle. The research progress of soil carbon emission at home and abroad and the cognition of underground carbon emission process in terrestrial ecosystem are comprehensively analyzed, and the related terms are sorted out and defined. The contribution of soil respiration components to atmospheric CO_2 concentration and its response to global warming were explained, and the necessity and ecological importance of distinguishing soil respiration components from terrestrial ecosystems were emphasized. It is pointed out that further study on the mechanism of rhizosphere excitation is the key to decipher the process of underground carbon cycle in the future ecosystem.
【作者单位】：中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室;中国科学院大学资源与环境学院;
【基金】：国家自然科学基金项目(31470560)资助
【分类号】：S154.1

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