Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL

Recent activities on ammonia emissions:

Emission inventory

• 1990, 1995 based on expert assumptions

• 2002, 2007, 2010 based on survey on manure management on representative stratified sample of farms

• Emission calculation with N-flux model AGRAMMON Why survey?

– Consulted experts can not reliably and comparable estimate changes that lead to 14% shift in emissions over 20 years

– Information on different regions, altitude zones, farm types– Survey on development of livestock and manure management also

valuable for other activities– Allows a detailed assessment of the abatement potential

Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL

Emission inventory

Representative survey

• 36 stratified classes (3 altitude zones, 3 geogr. Regions, 4 farm types)

• Analysed sample: 3 % of farms; at least 50 per class

• 12 page questionnaire• 1950 farms used for

analysis

Central

Eastern

Western

Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL

Recent activities on ammonia emissions:

Assessment of emission abatement potential

• Detailed assessment of farm specific abatement potential through individual and combined measures possible via AGRAMMON

• Detailed assessment of applicability of different measures model calculations for abatement potential

– “Business as usual”

– Realistically feasible

– Maximum technically possible (without cost considerations)

• Regionally differentiated

Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL

Abatement potential

Abatement potential in different regions (2002)

altitude regiontechnically

possible feasiblevalley East -39.8% -25.5%valley Central -36.2% -21.9%valley West/South -34.2% -22.0%hill East -34.2% -19.4%hill Central -33.3% -18.7%hill West/South -32.9% -18.0%mountain East -26.2% -13.9%mountain Central -24.2% -10.3%mountain West/South -21.1% -9.0%

-32.9% -19.1%total

Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL

Recent activities on ammonia emissions:

New measurements on application losses

Background

• Recent studies indicate standard emissions factors for slurry spreading might be too high (Sintermann et al. 2011)

New experiments

• Comparison of field scale and medium plot size experiments

• New series of measurements with different application techniques

• Different measurement systems (mainly impinger + Windtrax)

• International collaboration

Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL

What did we achieve?• Ceiling value 2010 (-14%) was just achieved

• Awareness of farmers on need of emission abatement has increased. Mainly thanks to new agricultural policy with nutrient balance restriction

• AGRAMMON is a valuable tool for scenario calculations on emissions at farm or regional level

• Reliable emission inventory; good agreement with atmospheric concentration monitoring network

• Detailed assessment of emission mitigation potential

• Thanks to regular survey on livestock and manure management we have a good understanding of the development of emissions and farm/manure management

• Good collaboration between Federal Office and research

Berner FachhochschuleHochschule für Agrar-, Forst- und Lebensmittelwissenschaften HAFL

Thank you for your attention