Summary
This winter field study examined how soil pH changes influence nitrous oxide emissions following autumn ploughing of grass–clover swards. The authors report that increases in soil pH substantially reduced N2O emissions under the study conditions, suggesting a potential mitigation pathway for this potent greenhouse gas in temperate grassland conversion. The findings are specific to autumn ploughing practices and winter field conditions in a Nordic climate.
Regional applicability
The study was conducted in Norway and may have limited direct applicability to United Kingdom grassland systems, which operate under different soil types, climate, and management timings. However, the mechanistic insight regarding soil pH and N2O suppression could be relevant to UK autumn ploughing practices and inform soil management strategies to reduce emissions from grass–clover ley conversion.
Key measures
N2O emissions (likely measured as flux or total seasonal output); soil pH; grass and clover sward composition
Outcomes reported
The study measured nitrous oxide (N2O) emissions from ploughed grass and clover swards during autumn and winter, investigating the mitigation effect of soil pH increase on these emissions.
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