Summary
This laboratory study employed 15N isotope tracing to quantify simultaneous nitrification and denitrification (SND) processes in nitrogen-fertilised soils incubated under oxygen-limiting conditions. The work advances understanding of nitrogen cycling mechanisms in waterlogged or poorly aerated soils, as suggested by the methodological focus on dual microbial nitrogen transformation pathways. The findings contribute to predicting nitrogen fate and greenhouse gas emissions from field soils experiencing temporary or chronic anaerobic stress.
UK applicability
The findings are relevant to UK farming contexts characterised by poorly drained soils, winter waterlogging, or intensive nitrogen fertiliser application (common in arable and livestock systems). Understanding SND pathways may inform nitrogen management and emission mitigation strategies on clay-rich soils or fields with impeded drainage typical of UK lowland regions.
Key measures
15N-labelled nitrogen transformations; rates of nitrification and denitrification; dual nitrogen pathway quantification; soil microbial activity under anaerobic conditions
Outcomes reported
The study quantified the occurrence and magnitude of simultaneous nitrification and denitrification (SND) in nitrogen-fertilised soils using 15N isotope tracing under oxygen-limiting conditions. The research measured nitrogen transformation pathways and their contribution to overall nitrogen cycling and greenhouse gas emissions in waterlogged or poorly aerated soils.
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