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

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. The Danish feeding system is based on Feeding Units (FU)
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. Newly established wetlands are not incorporated
N2O-emission II
Leaching and Runoff calculated by DIAS as a follow up of the Water Action Plans
1990: tonnes N
2000: 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
hectares are planned with N-removal capacity of
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. Relatively good estimates in future
Conclusion
Relatively good estimates in future