Ammonia emissions from fertiliser

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Presentation transcript:

Ammonia emissions from fertiliser Nick Hutchings

Developments since last meeting Revision was not completed in time for Zagreb Ad hoc group formed to review and accept/reject revision Revised methodology accepted

Developments since last meeting Revision was not completed in time for Zagreb Ad hoc group formed to review and accept/reject revision Revised methodology accepted

Developments since last meeting Revision was not completed in time for Zagreb Ad hoc group formed to review and accept/reject revision Revised methodology accepted Pan, B. B., et al. (2016) Ammonia volatilization from synthetic fertilizers and its mitigation strategies: A global synthesis. Agriculture Ecosystems & Environment 223: 283-289. Focus on fertiliser type and abatement measures

Developments since last meeting Revision was not completed in time for Zagreb Ad hoc group formed to review and accept/reject revision Revised methodology accepted Pan, B. B., et al. (2016). "Ammonia volatilization from synthetic fertilizers and its mitigation strategies: A global synthesis." Agriculture Ecosystems & Environment 223: 283-289. Focus on fertiliser type and abatement measures Identified further scientific studies Incorporated into emission database

Developments since last meeting Revision was not completed in time for Zagreb Ad hoc group formed to review and accept/reject revision Revised methodology accepted Pan, B. B., et al. (2016) Ammonia volatilization from synthetic fertilizers and its mitigation strategies: A global synthesis. Agriculture Ecosystems & Environment 223: 283-289. Focus on fertiliser type and abatement measures Identified further scientific studies Incorporated into emission database Re-analysed the data

Factors significantly affecting ammonia emission Fertiliser type Soil pH Application method (e.g. broadcast, incorporated) Crop (none, grass, cereal, maize, rice, trees) Air temperature or rainfall (almost both)

Implications for Guidebook No immediate changes  Consider revision as part of the Guidebook maintenance plan Will publish the revised model Make available as a Tier 3 method Note – data source was a highly significant variable Systematic differences between studies that cannot be explained by the variables available Included location (indoor/outdoor) and measurement method Similar situation for ammonia emissions from manure Needs further investigation