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酸沉降对泥炭地甲烷排放和碳循环的影响

柳铮铮1,2;曾从盛1,2;钟春棋1,2;仝川1,2   

  1. 1福建师范大学地理科学学院湿润亚热带生态地理过程省高校重点实验室, 福州 350007;2亚热带资源与环境省重点实验室, 福州 350007
  • 收稿日期:2008-01-20 修回日期:1900-01-01 出版日期:2008-10-10 发布日期:2008-10-10

Effects of acid deposition on methane emission and carbon cycling in peatland.

LIU Zheng-zheng;ZENG Cong-sheng;ZHONG Chun-qi; TONG Chuan   

  1. 1Key Laboratory of Humid Subtropical Ecogeographical Process, School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;2Fujian Provincial Key Laboratory of Subtropical Resources and Environment, Fuzhou 350007, China
  • Received:2008-01-20 Revised:1900-01-01 Online:2008-10-10 Published:2008-10-10

摘要: 泥炭地是一个巨大的碳库,是温室气体的源或汇。有研究表明,酸沉降可以促使硫酸盐还原细菌活性增加,并与产甲烷菌争夺基质,从而抑制甲烷气体的产生。这种作用可能对北方泥炭地及全球甲烷气体排放具有重要的影响。硫酸盐还原菌同产甲烷菌竞争主要受到硫酸根浓度、硫酸根循环速度、基质及温度的影响。通过硫酸根的快速循环,酸沉降可以长期抑制泥炭地的甲烷排放和产生。目前关于酸沉降对泥炭地碳库和碳循环的影响还无最后定论。本文综述了酸沉降对泥炭地甲烷产生、排放及碳循环影响的机制方面的最新研究成果,以期找出其内在规律,为今后研究提供参考,并探讨了中国在该领域可开展的研究方向。

关键词: 铝胁迫, 大豆, 光合特性

Abstract: Peatland is a large carbon reservoir, which can act as a source or sink of greenhouse gases. Recent researches show that the SO42- from acid rain can stimulate sulfate-reducing bacteria into a population capable of outcompeting methanogens for substrates, and thereby, can suppress methane emission. This microbemediated interaction may have a significant effect on northern peatlands’ and global methane emission. It is most likely that sulfate concentration, sulfur cycling, substrates, and temperature are the main factors limiting the competition of sulfate-reducing bacteria with methane-producing bacteria in peatlands. Through rapid sulfate cycling, acid deposition could suppress the production and emission of methane from peatland, but at present, the effects of acid deposition on the carbon pool and carbon cycling in peatland were still not drawn a conclusion. This paper reviewed the research advances in the effects and action mechanisms of acid deposition on the methane emission and carbon cycling in peatland, and put forward the prospects for the future researches in China.

Key words: Aluminum, Soybean, Photosynthetic character