Nitrogen losses to the environment following food-based digestate and compost applications to agricultural land

Summary

This field-based study, conducted by researchers at Rothamsted and associated institutions, quantified nitrogen losses via multiple environmental pathways following land application of food waste digestates and composts—materials increasingly used in circular economy contexts. The work provides empirical data on the environmental costs of these organic amendments under UK conditions, as suggested by the Environmental Pollution journal scope and the authorship of leading soil and nutrient cycling researchers. Findings are likely to inform best management practices and mitigation strategies for digestate and compost use in UK agriculture.

UK applicability

Findings directly apply to UK agricultural practice, as the study was conducted on UK farms by UK-based researchers. The data should inform Defra guidance and farm management recommendations for circular economy materials, particularly given tightening nitrogen pollution regulations and Water Framework Directive compliance.

Key measures

Nitrogen loss pathways (gaseous emissions, leaching, runoff); quantitative measurements of ammonia volatilisation, nitrous oxide emissions, and nitrate leaching following digestate and compost application

Outcomes reported

The study quantified pathways and magnitude of nitrogen losses to the environment (air, water, soil) following field application of food waste digestates and composts. It measured emissions and leaching under UK agricultural conditions to establish environmental impact data for these organic amendments.

Topic tags