土壤矿物驱动的反硝化研究进展

氮肥的大量施用虽然极大地推动了粮食的增产，但也引发了一系列生态环境问题。氮素在农田土壤中的转化规律长期受到研究人员的关注。本文介绍了农田土壤中除有机质以外的多种可以为反硝化提供电子的土壤矿物，如亚铁[Fe（Ⅱ）]和亚锰[Mn（Ⅱ）]的反硝化过程研究进展，探讨了可能影响土壤矿物驱动反硝化反应规律的因素。通过梳理发现，传统研究主要是在纯相条件下对Fe（Ⅱ）和Mn（Ⅱ）驱动反硝化过程进行研究。近年来愈来愈多的证据表明，在农田土壤这种复杂的介质中，Fe（Ⅱ）和Mn（Ⅱ）也可以为反硝化提供电子。然而，土壤矿物驱动的反硝化在农田土壤反硝化过程中的作用存在不确定性，其内在机理以及对农田土壤氮循环和温室气体排放的作用机制尚不明确。本文指出土壤矿物驱动的反硝化在农田土壤中的影响因素、作用机制以及该过程与有机质驱动的异养反硝化的相互关系是未来的研究方向。

Advances in denitrification driven by soil minerals

Although the application of nitrogen fertilizer has greatly promoted crop yield, it has also resulted in a series of ecological and environmental problems. The laws of nitrogen transformation in farmland soils have long been the focus of researchers. In this paper, advances in denitrification driven by soil minerals（ferrous [Fe（Ⅱ） ] and manganese [Mn（Ⅱ） ]）that provide electrons for denitrification in farmland soil, with the exception of organic matter, are introduced, and the factors that affect denitrification driven by soil minerals are discussed. Although the denitrification process driven by Fe（Ⅱ）and Mn（Ⅱ）has been mainly been studied under the pure phase condition, in recent years, increasing evidence has shown that Fe（Ⅱ）and Mn（Ⅱ）can also provide electrons for denitrification in complex media, such as soils. However, the proportion of soil mineral-driven denitrification in soil denitrification process is uncertain, and its mechanism and effect on soil nitrogen cycle and greenhouse gas emissions remains unclear. This study provides a basis for the future study of the factors and mechanisms of soil mineral-driven denitrification in farmland soil and the relationship between this process and organic matter driven heterotrophic denitrification.