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Danish GHG and ammonia emissions

Danish GHG and ammonia emissions. - the present and future changes - by Steen Gyldenkærne and Mette H. Mikkelsen Department of Policy Analysis National Environmental Research Institute, Denmark. The calculated Danish emission of NH3, N2O and CH4 1990-2001. Before

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Danish GHG and ammonia emissions

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  1. Danish GHG and ammonia emissions - the present and future changes - by Steen Gyldenkærne and Mette H. Mikkelsen Department of Policy Analysis National Environmental Research Institute, Denmark

  2. The calculated Danish emission of NH3, N2O and CH4 1990-2001

  3. Before - separate NH3 emission calculation - separate CH4 emission calculation - separate N2O calculation After Integrated emission system based on the Danish ammonia emission system

  4. Background for the Danish System • Two dead lobsters in 1985 • The Danish Action Plan on the Aquatic Environment in 1987 • reduction targets for nitrogen in ground water and leaching • maximum amount of nitrogen per hectare • maximum number of animals per hectare • ban of spreading of manure after harvest • minimum 9 month storage capacity • a control system by the Danish Plant Directorate

  5. A strong co-operation Danish Agricultural Advisory Centre Danish Institute of Agricultural Sciences National Environmental Research Institute

  6. The Danish Norm report (Poulsen et al. 2002)

  7. Data sheet for Dairy cow (Poulsen et al. 2002)

  8. Distribution of dairy cows in stable types in 2001

  9. The Danish NH3 emission system cover some of the most important figures for estimation CH4 and N2O emissions • Animals divided in subgroups • Stable types • Manure types • N ab stable • N ab storage • N available for plants after manure application • Amount of artificial fertiliser used • Amount of sewage used as fertiliser • Calculated ammonia emission

  10. CH4-emission • The Danish feeding system is based on Feeding Units (FU) • Enteric fermentation • Converting FU to MJ • Manure management • Amount of liquid and solid manure in each stable type is known • Coverage of slurry tanks reduce the CH4 emission • Temperature dependent production of CH4,

  11. N2O-emission I • From artificial fertiliser is calculated in the basic system • From grassing is calculated in the basic system • From manure management is calculated in the basic system • From sewage sludge is calculated in the basic system • NH3 and NOx emission is calculated in the basic system

  12. N2O-emission II • Leaching and Runoff calculated by DIAS as a follow up of the Water Action Plans • 1990: 290.000 tonnes N • 2000: 209.000 tonnes N • Nitrogen fixation and N i crop residues are calculated by DIAS as a follow up of the Water Action Plans • Danish Residue/Crop Product ratios are calculated by DIAS • Newly established wetlands are not incorporated • 16.000 hectares are planned with N-removal capacity of • 30-40.000 tonnes N

  13. Uncertainty The number of animals are well known (Cattle have their own ID) Stabling are well known Manure management are well known Leaching and Runoff are fairly well known

  14. Modelled and measured NH3-concentration in an agricultural area in Denmark 2000 Skjøt et al.2003 unpublished

  15. Modelled and measured NH3-concentration in an agricultural area in Denmark 1999-2001 Skjøt et al.2003 unpublished

  16. Conclusion Relatively good estimates in future

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