Effects of micro-molar H2O2 on inhibiting soil nitrification

Qin, J; Lin, C

Abstract

Microcosm experiments were conducted to examine the effects of micro-molar hydrogen peroxide (H2O2) on soil nitrification in three scenarios: (a) without added fresh biomass and magnetite, (b) with added fresh biomass, and (c) with added magnetite. The results show that nitrification of the added ammonium was impeded in the presence of H2O2 at a concentration range of 20–50μM probably as a result of weakened activities of ammoniaoxidizing microbes due to oxidative stress caused by H2O2 and possibly hydroxyl radical (·OH). Application of grass clippings or magnetite enhanced the effects of H2O2 on inhibiting soil nitrification. The research findings obtained from this study have implications for understanding the complication of soil nitrification by rainwaterborne H2O2 during flood events and developing cost-effective and environmentally friendly techniques for nitrification inhibition in fertilized soils.

Citation

Qin, J., & Lin, C. (2018). Effects of micro-molar H2O2 on inhibiting soil nitrification. Geoderma, 333, 145-148. https://doi.org/10.1016/j.geoderma.2018.07.028

• Journal Article Type: Article
• Acceptance Date: Jul 20, 2018
• Online Publication Date: Jul 23, 2018
• Publication Date: Jul 23, 2018
• Deposit Date: Aug 9, 2018
• Publicly Available Date: Jul 23, 2019
• Journal: Geoderma
• Print ISSN: 0016-7061
• Publisher: Elsevier
• Volume: 333
• Pages: 145-148
• DOI: https://doi.org/10.1016/j.geoderma.2018.07.028
• Publisher URL: https://doi.org/10.1016/j.geoderma.2018.07.028
• Related Public URLs: https://www.journals.elsevier.com/geoderma
• Additional Information: Funders : Natural Science Foundation of Guangdong Province; Grant Number: 2017A030310082