#8676. Oxygen-depletion by rapid ammonia oxidation regulates kinetics of N2O, NO and N2 production in an ammonium fertilised agricultural soil

November 2026publication date
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Journal’s subject area:
Soil Science;
Microbiology;
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Abstract:
Here, we investigated how nitrogenous gas kinetics interact with the transition of soil O2 status caused by N fertilisation. For this, different amounts of ammonium-based fertiliser were applied to an agricultural soil with a strong nitrification potential under three different initial O2 levels. Through repeated measurements of N2O, NO, and N2 concentrations and kinetics of mineral N following the decline of O2 concentrations, we determined how ammonium addition affects O2 consumption and accumulation of N2O under initially oxic headspace condition.
Keywords:
Denitrification; Functional gene transcript number; Nitrification; Nitrous oxide; Oxygen transition

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