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Ammonia emissions from fertilisers

Ammonia emissions from fertilisers. Nick Hutchings Dept of Agroecology. Background. The Guidebook revision in 2008/9 Ammonia emission dependent on fertiliser type, soil pH and temperature Documentation for the methodology could not be found.

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Ammonia emissions from fertilisers

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  1. Ammonia emissions from fertilisers Nick Hutchings Dept of Agroecology

  2. Background • The Guidebook revision in 2008/9 • Ammonia emission dependent on fertiliser type, soil pH and temperature • Documentation for the methodology could not be found. • EEA funded the Dept of Environmental Sciences, Aarhus University to update the chapter. • Collatedpublishedmeasurement data • Found effect of fertiliser type, application methodand soil pH but not temperature. • Current method means emission increases for some Parties

  3. Assessment of the current methodology (Sebastian) • Detailed analysis of the collated data (Nick)

  4. Sebastian’s presentation here

  5. New analysis • Aarhus University has used own resources to undertake a more detailed analysis • Found significant effects of: • fertiliser type • application method • soil pH (+ve) • crop type (bare soil, grassland, cereal) (-ve) • claycontent (+ve) • rainfallafterapplication (-ve) +ve = increases emission, -ve = decreases

  6. Potential methodologies • Tier 2 (activitydata need to bewidelyavailable): • fertiliser type (FAO) • soil pH, claycontent (national/European soils databases) • Tier 3: • fertiliser type, soil pH, claycontent • crop type (EUROSTAT) • application method (survey) • rainfallafterapplication (survey + meteorology)

  7. Tier 3 - urea

  8. However…. • The data collated have inadequacies • Somefertilisersarepoorlyrepresented • Some situations arepoorlyrepresented • Differences in measurementmethodologies • Need a coordinatedmeasurementcampaign • Focus on mainfertilisers or maingroups • Climates and soilsrepresentativeof European ranges • Standardisedmeasurementmethods

  9. Current emission factors v new analysis

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