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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.
The coupling process of the earth system is the key content of the research on the geo-process of the Earth’s surface system, and the wetland is an important part of the Earth’s surface ecosystems.Water wetland soil is anaerobic, The coupling process of Fe and N in the process of redox process is mainly manifested in three aspects: microbial use of NO3-oxidized Fe2 +, the use of Fe3 + oxidation of NH4 + and wetland anaerobic soil NO3 - for the inhibition of Fe3 + reduction.The study of this coupling process is of great importance for the understanding of the cycle of Fe and N in wetlands.This paper reviews the research status of the coupling process of Fe and N in wetland from three aspects.In general, Therefore, the research on NO 3 -oxidized Fe 2+ should be more in-depth than the other two aspects. Therefore, we should strengthen the microbial mechanism of Fe 3 + oxidation of NH 4+ and the comprehensive evaluation of the coupling process of Fe and N to better understand and master Wetland biogeochemical cycle process provides a theoretical basis.