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应用生态学报 ›› 2003, Vol. ›› Issue (2): 305-309.

• 研究论文 • 上一篇    下一篇

无机氮对土壤甲烷氧化作用的影响

王智平1, 胡春胜2, 杨居荣3   

  1. 1. 中国科学院植物研究所, 北京 100093;
    2. 中国科学院石家庄农业现代化研究所, 石家庄 050021;
    3. 北京师范大学环境科学研究所, 北京 1008751
  • 收稿日期:2001-04-19 修回日期:2001-09-07
  • 通讯作者: 王智平,男,1965年出生,博士,副研究员,主要从事生物地球化学与环境地球化学研究,发表论文40多篇.E-mail:wangzp5@yahoo.com.
  • 基金资助:
    中国科学院知识创新项目(KZCX24135);英国皇家学会(Royal Fellowship,Royal Society of United Kingdom)资助项目

Effect of inorganic nitrogen on CH4 oxidation in soils

WANG Zhiping1, HU Chunsheng2, YANG Jurong 3   

  1. 1. Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
    2. Institute of Shijiazhuang Agricultural Modernization, Chinese Academy of Sciences, Shijiazhuang 050021, China;
    3. Institute of Environmental Sciences, Beijing Normal University, Beijing 100875, China
  • Received:2001-04-19 Revised:2001-09-07

摘要: 无机氮输入(施氮肥和大气N沉降)对土壤CH4氧化作用的影响取决于甲烷氧化菌类型、输N种类和量以及土壤状况.这种作用既有抑制作用,又有刺激作用,但文献报道的抑制作用多于刺激作用,NH4+对CH4氧化的抑制作用多于NO3-.随着全球N输入的增加,应在广泛的土壤类型和气候带观测和评价无机氮对土壤CH4氧化作用的影响.无机氮对土壤CH4氧化的抑制作用表现为立即或直接抑制、延迟抑制以及缺乏抑制等多种模式.尽管目前一些学者用酶基质竞争、增高的 值、盐作用和离子交换、N转化率和N浓度等来解释抑制现象,但抑制机理依旧不完全清楚.因此,抑制机理是本领域未来研究的主要目标之一.

关键词: 甲烷, 甲烷氧化菌, 氨态氮, 硝态氮, 抑制, 土壤, 耐低磷, 苦荞, 综合评价, 隶属函数, 主成分分析

Abstract: The effects of N inputs,including N fertilizer applications and atmospheric Ndepositions, on CH4 oxidation by soils were determined by CH4 oxidizing bacteria, N inputs and soil factors. These effects were inhibitory or stimulative, but inhibition was more popular than stimulation, and the inhibition of NH4+ was more popular than that of NO3-. Wealthy experiments in different soils and climate regions are required to monitor and evaluate how N inputs influence CH4 oxidation in soils. Generally, CH4 oxidation in soils following N inputs showed multiple inhibition patterns, i.e., immediate or direct inhibition, delayed inhibition, and absence of inhibition. Some researchers explained the inhibition mechanism through using competition between CH4 and NH4+ for the same enzyme sites, elevated threshold, salt effect and ion exchange, and N turnover rate and N concentration. However, the inhibitory mechanism is still unclear. Therefore, inhibitory mechanism is one of the main research concerns in future.

Key words: Methane, Methane oxidizing bacteria, Ammonium, Nitrate, Inhibition, Soil, principal component analysis, comprehensive evaluation., Fagopyrum tararicum, subordinate function, phosphorus tolerance

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