The effect of diet manipulation on nitrous oxide and methane emissions from manure application to incubated grassland soils |
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| Institution: | 1. Institute of Grassland and Environmental Research, North Wyke, Okehampton, Devon EX20 2SB, UK;2. Institute of Grassland and Environmental Research, Aberystwyth SY23 3EB, UK;3. Institut für Bodenkunde und Waldernährung, Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany;4. Dpto. Química y Análisis Agrícola, ETSI Agrónomos, C/Ciudad Universitaria s/n, 28040 Madrid, Spain;1. Rothamsted Research, North Wyke, Okehampton, Devon EX20 2SB, UK;2. Technical University of Madrid, Chemistry and Agricultural Analysis, Madrid, Spain;3. School of Geography, Earth and Environmental Sciences, University of Plymouth, Davy Building, Drake Circus, Plymouth, Devon PL4 8AA, UK;4. Agri-Food and Biosciences Institute, Newforge Lane, Belfast BT9 5PX, UK;5. Thünen-Institut für Agrarklimaschutz, Bundesallee 50, 38116 Braunschweig, Germany;1. Laboratory of Isotope Geology and Geoecology, Department Applied Geology and Geochemistry, Institute of Geological Sciences, University of Wroc?aw, Cybulskiego 30, 50-205 Wroclaw, Poland;2. Thünen Institute of Climate-Smart Agriculture, Bundesallee 50, 38116 Braunschweig, Germany;1. Johann Heinrich von Thünen-Institute (TI) - Federal Research Institute for Rural Areas, Forestry and Fisheries, Institute of Biodiversity, Bundesallee 50, D-38116 Braunschweig, Germany;2. Julius Kühn-Institute (JKI) – Federal Research Institute for Cultivated Plants, Institute for Plant Protection in Field Crops and Grassland, Messeweg 11/12, D-38104 Braunschweig, Germany;3. Johann Heinrich von Thünen-Institute (TI) – Federal Research Institute for Rural Areas, Forestry and Fisheries, Institute of Agricultural Technology, Bundesallee 50, D-38116 Braunschweig, Germany;1. Rothamsted Research, West Common, Harpenden, Hertfordshire AL5 2JQ, UK;2. Cranfield University, Cranfield, Bedfordshire MK43 0AL, UK;3. Rothamsted Research, North Wyke, Okehampton, Devon EX20 2SB, UK;4. ADAS UK LTD, Pendeford House, Pendeford Business Park, Wobaston Road, Wolverhampton WV9 5AP, UK;5. Centre for Ecology and Hydrology, Bush Estate, Penicuik, Midlothian EH26 0QB, UK;1. Laboratoire d’Ecologie Microbienne LEM, INRA UMR 1418, CNRS UMR 5557, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne Cedex, France;2. INRA, UMR1114 EMMAH, Site Agroparc, 84914, Avignon, France;1. Laboratory of Isotope Geology and Geoecology, Department Applied Geology and Geochemistry, Institute of Geological Sciences, University of Wroc?aw, Cybulskiego 30, 50-205 Wroclaw, Poland;2. Thünen Institute of Climate-Smart Agriculture, Bundesallee 50, 38116 Braunschweig, Germany |
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| Abstract: | Changes to agricultural management, particularly of the nitrogen (N) input to farms, have great potential for mitigating emissions of N containing gases, especially the greenhouse gas nitrous oxide (N2O). Manipulating diets fed to livestock is a potential method for controlling N excretion and emissions of greenhouse gases (GHG's) to the atmosphere. We selected three slurries derived from sheep that had been fed, either ensiled ryegrass (Lolium hybridicum), lucerne (Medicago sativa) or kale (Brassica oleracea) and applied them to a grassland soil from the UK in a laboratory experiment using a special He/O2 atmosphere incubation facility. The resulting fluxes of N2O, CH4 and N2 were measured, with the largest total N fluxes generated by the ryegrass slurry treatment (14.23 ryegrass, 10.84 lucerne, 13.88 kale and 4.40 kg N ha?1 from the control). Methane was emitted only from the ryegrass slurry treatment. The isotopomer signatures for N2O in the control and lucerne slurry treatments indicated that denitrification was the main process responsible for N2O emissions. |
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