凋落物输入对森林土壤有机碳转化与稳定性影响的研究进展  

Research advance in the effects of litter input on forest soil organic carbon transformation and stability

作　　者：郭晓伟 张雨雪 尤业明[3] 孙建新[4] GUO Xiaowei;ZHANG Yuxue;YOU Yeming;SUN Jianxin(College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,Shaanxi,China;School of Life Sciences,Hebei University,Baoding 071002,Hebei,China;School of Forestry,Guangxi University,Nanning 530004,China;School of Ecology and Nature Conservation,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]河北大学生命科学学院,河北保定071002 [3]广西大学林学院,南宁530004 [4]北京林业大学生态与自然保护学院,北京100083

出　　处：《应用生态学报》2024年第9期2352-2361,共10页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(32301384,31870426);中国博士后科学基金项目(2022M722776);地表过程分析与模拟教育部重点实验室开放基金资助。

摘　　要：土壤有机碳的周转和稳定过程与凋落物输入的性质密切相关。由于凋落物分解的复杂性以及森林土壤的高度异质性,土壤矿物、微生物以及环境因子如何协同调控凋落物输入对土壤有机碳的转化和稳定,还存在较大不确定性。本文综述了以微生物代谢和有机碳转化为核心的“微生物效率-基质调控概念框架”以及最新提出的“微生物碳泵”和“矿物碳泵”理论在森林土壤有机碳转化和稳定中的研究进展,强调了区别于土壤“有机-无机交互”作用的“有机-有机交互”作用在土壤有机碳累积过程中的作用机制,并阐述了如何基于“物质循环”和“能量流动”探索土壤有机碳的转化和稳定过程,以期为森林土壤生态系统固碳研究提供理论支撑。The turnover and stabilization of soil organic carbon are tightly associated with the properties of litter in-put.Due to the complexity of litter decomposition and the high heterogeneity of forest soils,there are considerable uncertainties about how soil minerals,microorganisms,and environmental factors jointly regulate the transformation and stability of litter-derived soil organic carbon.Here,we present an overview of the“microbial efficiency-matrix stabilization”framework centered on microbial metabolism and organic carbon transformation,as well as the new“microbial carbon pump”and“mineral carbon pump”theories in forest soil organic carbon transformation and sta-bilization.We specifically highlighted a differential mechanism of“organo-organic interfaces”from the“organo-mineral interfaces”in the effects on soil organic carbon accumulation.We further expounded the transformation processes and stability of soil organic carbon based on the“carbon material cycling”and“energy fluxes”,aiming to provide theoretical support for the research on carbon sequestration in forest soils.

关 键 词：凋落物质量 凋落物数量 根系碳源 土壤碳组分 植物源碳 微生物源碳 微生物碳泵 矿物碳泵 

分 类 号：S714.2[农业科学—林学]