Progress on effects of dissolved organic matter in soil on nitrogen cycling and N₂O emissions

ZHENG Zihan; QIU Yanxun; YE Xinyuan; XU Jiran; XU Yang; YU Hongyan; TENG Yue

doi:10.13300/j.cnki.hnlkxb.2026.02.012

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Progress on effects of dissolved organic matter in soil on nitrogen cycling and N₂O emissions

Resources and environment | 更新时间：2026-11-05

- Progress on effects of dissolved organic matter in soil on nitrogen cycling and N₂O emissions
- Journal of Huazhong Agricultural University Vol. 45, Issue 2, Pages: 113-121(2026)
- 作者机构：
  
  江南大学环境与生态学院，无锡 214122
- 作者简介：
- 基金信息：
- DOI：10.13300/j.cnki.hnlkxb.2026.02.012
  CLC： X131
- Received：11 March 2025，
  
  Published：15 March 2026
- 稿件说明：
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郑紫晗，邱彦勋，叶馨远，等.土壤中溶解性有机质对氮循环及N₂O排放影响研究进展［J］.华中农业大学学报，2026，45（2）：113‐121. DOI: 10.13300/j.cnki.hnlkxb.2026.02.012.

ZHENG Zihan,QIU Yanxun,YE Xinyuan,et al.Progress on effects of dissolved organic matter in soil on nitrogen cycling and N₂O emissions[J].Journal of Huazhong Agricultural University,2026,45(02):113-121.
郑紫晗，邱彦勋，叶馨远，等.土壤中溶解性有机质对氮循环及N₂O排放影响研究进展［J］.华中农业大学学报，2026，45（2）：113‐121. DOI: 10.13300/j.cnki.hnlkxb.2026.02.012. DOI：

ZHENG Zihan,QIU Yanxun,YE Xinyuan,et al.Progress on effects of dissolved organic matter in soil on nitrogen cycling and N₂O emissions[J].Journal of Huazhong Agricultural University,2026,45(02):113-121. DOI： 10.13300/j.cnki.hnlkxb.2026.02.012.

摘要

全球氮肥使用量的持续增加导致N₂O排放问题日益严峻，如何有效减少N₂O的排放并提高氮素利用效率成为当前研究的重点。土壤溶解性有机质（soil dissolved organic matter，DOM）在土壤氮循环中发挥着至关重要的作用，直接或间接影响氮的矿化、固持、硝化、反硝化以及N₂O排放等过程。本文综述了DOM在土壤氮循环以及N

O排放中的调控作用与机制，主要包括以下几个方面：（1）DOM通过提供碳源和能量，促进微生物代谢活动，从而加速有机氮的矿化，缓解氮素供应的限制；（2）DOM的组成与形态对氮素的固持、硝化和反硝化反应具有显著调控作用，影响土壤中氮的转化速率；（3）DOM在硝化和反硝化过程中既能作为电子供体，又能通过改变土壤微生物群落结构影响氮素转化过程。解析DOM对土壤氮循环的影响不仅有助于理解土壤氮的动态变化，还能为减缓温室气体排放、优化农业管理措施提供理论依据。

Abstract

The continuous increase of globally using nitrogen fertilizer has led to a growing concern over N₂O emissions.How t

o effectively reduce N

O emissions and improve nitrogen use efficiency has become the key points of current studies.Dissolved organic matter （DOM） in soil plays a crucial role in the nitrogen cycling in soil，directly or indirectly affecting process of the mineralization，immobilization，nitrification，denitrification of nitrogen and the N₂O emissions.This article reviewed the regulatory role and mechanism of DOM in the nitrogen cycling and N

O emissions in soil mainly from the following aspects including DOM promoting the metabolic activity of microorganisms in soil by providing carbon sources and energy，thereby accelerating the mineralization of organic nitrogen and alleviating the limitations of nitrogen supply，the composition and morphology of DOM significantly regulating the fixation，nitrification，denitrification of nitrogen and affecting the transformation rate of nitrogen in soil，and DOM serving as an electron donor during the nitrification and denitrification of nitrogen and affecting the transformation of nitrogen by altering the structure of microbial community in soil.Analyzing the effects of DOM on nitrogen cycling in soil both helps to understand the dynamic changes of nitrogen in soil and provides a theoretical basis for mitigating the emissions of greenhouse gas and optimizing the management of agriculture.

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references

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