Methane,nitrous oxide and ammonia emissions during storage and after application of dairy cattle slurry and influence of slurry treatment |
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| Institution: | 1. University of Natural Resources and Applied Life Sciences, Department of Sustainable Agricultural Systems, Division of Agricultural Engineering, Peter Jordan-Strasse 82, A-1190 Vienna, Austria;2. Department of Forest Ecology, Federal Research and Training Centre for Forests, Natural Hazards and Landscape, Seckendorff-Gudent Weg 8, A-1131 Vienna, Austria;1. Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada;2. School of Environmental Sciences, University of Guelph, Ontario, Canada;3. Environment Canada, Gatineau, Quebec, Canada;1. Agriculture and Agri-Food Canada, Science and Technology Branch, 960 Carling Avenue, Ottawa, ON, Canada K1A 0C6;2. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada T6G 2H4;3. Ontario Ministry of Agriculture and Food, Guelph, ON, Canada N1G 2W1;1. Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada;2. School of Environmental Sciences, University of Guelph, Ontario, Canada;3. Ontario Ministry of Agriculture Food and Rural Affairs, Kemptville, ON, Canada;4. Environment Canada, Gatineau, Quebec, Canada;1. Department Agroecology, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark;2. Cirad, UMR Selmet, Montpellier, F-34398, France; RSA, Antsirabe, Madagascar;3. School of Environment, Natural Resources and Geography, Bangor University, Deiniol Road, Bangor LL57 2UW, Wales;4. Basque Centre for Climate Change, Alameda Urquijo 4, 48008 Bilbao, Spain;5. INRA Agrocampus Ouest, UMR1348 PEGASE, F-35590 Saint Gilles, France;6. Wageningen UR Livestock Research, PO Box 135, 6700 AC Wageningen, The Netherlands;7. Institute of Chemical Engineering, Biotechnology and Environmental Technology, University Southern Denmark, Campusvej 55, 5230 Odense M, Denmark;1. Department of Agricultural and Environmental Sciences, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy;2. Rothamsted Research, North Wyke, Okehampton, Devon EX20 2SB, UK;1. Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium;2. Department of Agricultural Economics, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium;3. Inagro vzw, Research and advice in agriculture and horticulture, Ieperseweg 87, 8800, Rumbeke-Beitem, Belgium |
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| Abstract: | Slurries are a significant source of CH4, NH3 and N2O emissions to the atmosphere. The research project aimed at quantifying CH4, NH3 and N2O emissions from liquid manure stores and after manure application under field conditions. The influence of the manure treatment options “no treatment”, “slurry separation”, “anaerobic digestion”, “slurry aeration” and “straw cover” on the emission level was investigated. Approximately 10 m3 of differently treated slurry were stored in pilot scale slurry tanks. Emissions were followed for c. 80 days. After the storage period, slurries were applied to permanent grassland. Greenhouse gas emissions from slurry were mainly caused by methane emissions during storage and by nitrous oxide emissions after field application of manures. Mitigation of GHG emissions can be achieved by a reduction in slurry dry matter and easily degradable organic matter content. Ammonia emissions mainly occurred after field application. Untreated slurry emitted 226.8 g NH3 m−3 and 92.4 kg CO2 eq. m−3 (storage and field application). Slurry separation (liquid fraction and composting of the solid fraction) resulted in NH3 losses of 402.9 g m−3 and GHG losses of 58.5 kg CO2 eq. m−3. Anaerobic digestion was a very effective means to reduce GHG emissions. 37.9 kg CO2 eq. m−3 were lost. NH3 emissions were similar to those from untreated slurry. Covering the slurry store with a layer of chopped straw instead of a wooden cover increased NH3 emissions to 320.4 g m−3 and GHG emissions to 119.7 kg CO2 eq. m−3. Slurry aeration nearly doubled NH3 emissions compared to untreated slurry. GHG emissions were reduced to 53.3 kg CO2 eq. m−3. |
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