Summary
This narrative review synthesises the current state of knowledge on nitrous oxide emissions from ruminant urine deposited in intensively managed perennial pasture systems, a significant but underestimated source of agricultural greenhouse gases. The authors examine the underlying biogeochemical pathways driving N₂O production and critically appraise evidence for potential mitigation strategies. The work addresses a substantive gap between the intensification of pastoral systems and climate change mitigation imperatives.
UK applicability
Highly applicable to UK pastoral farming, where intensive grassland systems are widespread and ruminant urine patches represent a major on-farm N₂O source. The findings and mitigation strategies reviewed are directly relevant to UK farm practice and policy objectives for reducing agricultural emissions.
Key measures
Nitrous oxide (N₂O) emissions; emission factors; biogeochemical pathways (nitrification and denitrification); mitigation strategy effectiveness
Outcomes reported
The review synthesises current understanding of N₂O emission pathways from ruminant urine patches and evaluates mitigation strategies. It examines biogeochemical processes and practical interventions for reducing greenhouse gas emissions whilst maintaining pasture productivity.
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