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Danish GHG and ammonia emissions

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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 - PowerPoint PPT Presentation
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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
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Page 1: Danish GHG and ammonia  emissions

Danish GHG and ammonia emissions

- the present and future changes -

by

Steen Gyldenkærne and Mette H. MikkelsenDepartment of Policy Analysis

National Environmental Research Institute, Denmark

Page 2: Danish GHG and ammonia  emissions

0

2000

4000

6000

8000

10000

12000

1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001

Gg

CO

2-eq

u.

0

20000

40000

60000

80000

100000

120000

To

nn

es N

H3-

N

Gg N2O (CO2-equ.)

Gg CH4 (CO2-equ.)

Tonnes NH3-N

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

Page 3: Danish GHG and ammonia  emissions

Before

- separate NH3 emission calculation

- separate CH4 emission calculation

- separate N2O calculation

After

Integrated emission system based on the Danish ammonia emission system

Page 4: Danish GHG and ammonia  emissions

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

Page 5: Danish GHG and ammonia  emissions

Danish Agricultural

Advisory Centre

National Environmental

Research Institute

Danish Institute of

Agricultural Sciences

A strong co-operation

Page 6: Danish GHG and ammonia  emissions

The Danish Norm report (Poulsen et al. 2002)

Page 7: Danish GHG and ammonia  emissions

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

Page 8: Danish GHG and ammonia  emissions

Type No.in 2002

Stable type Percentage Manure type

Large dairy cows 558.093 Stanchion bars with liquid and solid manure 18 Solid manure18 +Liquid manuire

Stanchion bars with grid 28 SlurryLose holdings with beds, slatted floor, ring drain 34 SlurryLose holdings with beds, slatted floor, scrapers 3 SlurryLose holdings with beds, solid floor, scrapers 6 SlurryDeep litter (whole area) 0 Deep litterDeep litter, slatted floor, ring drain 7 Deep litter

7 +SlurryDeep litter, slatted floor, scrapers 1 Deep litter

1 +SlurryDeep litter, solid floor, scrapers 3 Deep litter

3 +Slurry

Distribution of dairy cows in stable types in 2001

Page 9: Danish GHG and ammonia  emissions

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

Page 10: Danish GHG and ammonia  emissions

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,

21

12 )(exp

TRT

TTEf

Page 11: Danish GHG and ammonia  emissions

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

Page 12: Danish GHG and ammonia  emissions

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

Page 13: Danish GHG and ammonia  emissions

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

Page 14: Danish GHG and ammonia  emissions

Skjøt et al.2003 unpublished

Modelled and measured NH3-concentration in an agricultural area in Denmark 2000

Page 15: Danish GHG and ammonia  emissions

Modelled and measured NH3-concentration in an agricultural area in Denmark 1999-2001

Skjøt et al.2003 unpublished

Page 16: Danish GHG and ammonia  emissions

Conclusion

Relatively good estimates in future


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