Summary
This global meta-analysis, published in the Journal of Cleaner Production, synthesises peer-reviewed data on how long-term nitrogen fertilisation alters denitrification activity in agricultural soils. As suggested by the title, the work quantifies heterogeneous responses across regions and soil types, likely contributing to understanding of how nitrogen management strategies affect both nutrient loss pathways and greenhouse gas emissions. The findings are intended to inform fertiliser management practices aimed at balancing crop productivity with environmental stewardship.
UK applicability
UK cereal and intensive grassland systems frequently rely on synthetic nitrogen fertilisers; this meta-analysis offers evidence on how such practices affect soil denitrification, relevant to UK policy on nutrient runoff, nitrate pollution, and agricultural greenhouse gas mitigation. Results may inform Defra guidance on fertiliser best management practices, though site-specific soil and climate factors remain important for local application.
Key measures
Potential denitrification activity; nitrogen fertilisation rates and duration; soil properties; enzyme activity assays
Outcomes reported
The study synthesised global data on how denitrification activity in soils responds to long-term nitrogen fertilisation across diverse farming systems and soil conditions. It quantified the direction and magnitude of changes in potential denitrification enzyme activity (PDEA) under sustained nitrogen input.
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