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应用生态学报 ›› 2019, Vol. 30 ›› Issue (2): 677-684.doi: 10.13287/j.1001-9332.201902.028

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全球变化对森林土壤甲烷吸收的影响及其机制研究进展

何姗1,2,刘娟1,2*,姜培坤1,2,周国模1,2,李永夫1,2   

  1. 1浙江农林大学亚热带森林培育国家重点实验室, 浙江临安 311300;
    2浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室, 浙江临安 311300
  • 收稿日期:2018-07-04 修回日期:2018-12-22 出版日期:2019-02-20 发布日期:2019-02-20
  • 通讯作者: E-mail:liujuan@zafu.edu.cn
  • 作者简介:何姗,女,1993年生,硕士研究生.主要从事土壤碳汇与全球气候变化研究.E-mail:m18868191676@163.com
  • 基金资助:
    本文由国家自然科学基金项目(31700540)和浙江省自然科学基金项目(LY15C160004)资助

Effects of global change on methane uptake in forest soils and its mechanisms: A review

HE Shan1,2, LIU Juan1,2*, JIANG Pei-kun1,2, ZHOU Guo-mo1,2, LI Yong-fu1,2   

  1. 1State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an 311300, Zhejiang, China;
    2Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Lin’an 311300, Zhejiang, China
  • Received:2018-07-04 Revised:2018-12-22 Online:2019-02-20 Published:2019-02-20
  • Supported by:
    This work was supported by the National Na-tural Science Foundation of China (31700540) and the Natural Science Foundation of Zhejiang Province (LY15C160004).

摘要: 大气CO2浓度升高、降水格局改变、全球氮沉降增加和土地覆盖变化等全球变化不仅改变了森林土壤理化性质,而且影响了植物的生长和微生物活性,导致森林土壤碳、氮循环发生改变,进而影响土壤CH4的吸收.本研究综述了森林土壤CH4吸收的重要性,森林土壤CH4吸收对大气CO2浓度升高、降水格局改变、全球氮沉降增加和土地覆盖变化等全球变化的响应差异及驱动机制.大气CO2浓度升高抑制土壤CH4吸收;降水减少倾向于促进土壤CH4吸收;外源氮输入抑制富氮森林土壤CH4吸收,而对贫氮森林土壤CH4吸收则表现为促进或不影响;森林转化为草地、农田或人工林会减少土壤CH4的吸收量,而植树造林则会增加土壤CH4的吸收量.今后的研究重点是探讨全球变化对森林土壤CH4吸收产生长期影响和综合效应,并借助分子生物学方法进一步探究土壤CH4吸收的微生物学机制.

关键词: 森林土壤, 全球变化, CH4吸收, 响应机制

Abstract: Elevated atmospheric CO2 concentration, altered precipitation regime, increased nitrogen deposition, and land cover change have not only changed the physical and chemical properties of forest soils, but also affected plant growth and microbial activity, with concequences on soil carbon and nitrogen cycles, including soil CH4 uptake. In this study, we summarized the important role of soil CH4 uptake in forests under global change scenarios. The differences of responses as well as the underlying mechanisms of soil CH4 uptake in forests to global change were reviewed. Elevated atmospheric CO2 concentration inhibits soil CH4 uptake. Reduced precipitation tends to promote soil CH4 uptake. Increased nitrogen input inhibits soil CH4 uptake in nitrogen-rich forests, but promotes or has no effects on soil CH4 uptake in nitrogen-poor forests. Conversion of forests to grassland, farmland, or plantations would reduce soil CH4 uptake, while afforestation increases soil CH4 uptake. The future research should explore the long-term and multiple effects of global changes on forest soil CH4 uptake. In addition, molecular biology methods should be developed to explore the microbial mechanism of soil CH4 uptake.

Key words: forest soil, responding mechanism, global change, CH4 uptake