Summary
This field trial quantified greenhouse gas emissions separately from cattle urine and dung applications on UK grassland, addressing significant gaps in spatiotemporal emission data from grazed pastoral systems. The research tested the nitrification inhibitor DCD as a potential mitigation strategy and generated emission factors intended to improve agricultural greenhouse gas inventory methodologies. The findings provide evidence for management practices that could reduce emissions from pastoral livestock production.
UK applicability
The study was conducted on UK grassland under UK conditions, making its findings directly applicable to UK pastoral farming systems and inventory reporting under the IPCC framework. Results inform mitigation options available to UK livestock farmers and contribute to evidence for agricultural policy related to emissions reduction.
Key measures
N₂O and CH₄ emission factors (kg N₂O-N/kg N excreted; kg CH₄/kg dry matter) from cattle urine and dung; cumulative emissions over measurement periods; effect of DCD application on emission reduction
Outcomes reported
The study measured nitrous oxide (N₂O) and methane (CH₄) emissions from grassland soil following separate applications of cattle urine and dung at different times during the grazing season. It evaluated the effectiveness of the nitrification inhibitor DCD in reducing emissions from urine application.
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