| 湿地土壤Fe与N耦合过程研究进展 |
| 摘要点击 1353 全文点击 1259 投稿时间：2009-11-07 修订日期：2010-03-26 |
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| 中文关键词 湿地土壤 耦合 微生物 氧化 还原 |
| 英文关键词 wetland soils coupling microbiology oxidation reduction |
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| 中文摘要 |
| 地球系统的耦合过程研究是目前地球表层系统地理过程研究的重点内容，湿地是地球表层生态系统重要的组成部分.湿地土壤季节性或长期处于积水的厌氧状态，这一厌氧环境中的Fe、N在氧化还原过程中存在微生物作用下的耦合过程.这种耦合过程主要表现在3个方面，即微生物利用NO-3氧化Fe2+、利用Fe3+氧化NH+4以及湿地厌氧土壤中NO-3对于Fe3+还原的抑制作用.这一耦合过程的研究对于认识湿地中Fe、N的循环具有重要意义.文章从3个方面综述了湿地土壤Fe与N耦合过程的研究现状.总体看来，目前对于NO-3氧化Fe2+方面的研究较另外两方面更深入，因此应加强Fe3+氧化NH+4的微生物机制、Fe与N耦合过程的综合评价等方面的研究，从而为人们更好地了解和掌握湿地生物地球化学循环过程提供理论依据. |
| 英文摘要 |
| The coupling process of the earth system is the key research content of earth surface system at present. Wetland is an important ecosystem on the earth surface. Wetland soil is under anaerobic conditions seasonally or perennially because of waterlogging, where the redox of Fe and N can be coupled by microbiology. The coupling process lies in three aspects: the microbial coupling of NO-3-reduction and Fe2+-oxidation, coupling of Fe3+-reduction and NH+4-oxidation and the interaction of NO-3 and Fe3+ during reduction. Getting the knowledge of the coupling process has important significance to understand the cycles of Fe and N in wetland soil. The article reviews the research status of the three aspects. In general, we have a comparatively deep understand of the coupling process of NO-3-reduction and Fe2+-oxidation than the latter two aspects. The research of microbial mechanism of the coupling process of Fe3+-reduction-NH+4-oxidation and the comprehensive evaluation of the environmental significance of coupling process of Fe and N in wetland soil should be strengthened in the future research, and then it can provide evidence for wetland protection and management. |
