Nitrous oxide emissions from European agriculture – an analysis of variability and drivers of emissions from field experiments

Rees, R M and Augustin, J and Alberti, G and Ball, C and Boeck, P and Cantarel, A and Chirinda, N and Chojnicki, B and Giebels, M and Gordon, H and Grosz, B and Horvath, L and Juszczak, R and Klemedtsson, A K and Klemedtsson, L and Medinets, S and Machon, A and Mapanda, F and Nyamangara, J and Olesen, J E and Reay, D S and Sanchez, L and Cobena, A S and Smith, K A and Sowerby, A and Sommer, M and Soussana, J F and Stenberg, M and Topp, C F E and van Cleemput, O and Vallejo, A and Watson, C A and Wuta, M (2013) Nitrous oxide emissions from European agriculture – an analysis of variability and drivers of emissions from field experiments. Biogeosciences (BG), 10. pp. 2671-2682. ISSN 1726-4170

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Abstract

Nitrous oxide emissions from a network of agricultural experiments in Europe were used to explore the relative importance of site and management controls of emissions. At each site, a selection of management interventions were compared within replicated experimental designs in plot-based experiments. Arable experiments were conducted at Beano in Italy, El Encin in Spain, Foulum in Denmark, Logården in Sweden, Maulde in Belgium, Paulinenaue in Germany, and Tulloch in the UK. Grassland experiments were conducted at Crichton, Nafferton and Peaknaze in the UK, Gödöllö in Hungary, Rzecin in Poland, Zarnekow in Germany and Theix in France. Nitrous oxide emissions were measured at each site over a period of at least two years using static chambers. Emissions varied widely between sites and as a result of manipulation treatments. Average site emissions (throughout the study period) varied between 0.04 and 21.21 kg N2O-N ha−1 yr−1, with the largest fluxes and variability associated with the grassland sites. Total nitrogen addition was found to be the single most important determinant of emissions, accounting for 15% of the variance (using linear regression) in the data from the arable sites (p < 0.0001), and 77% in the grassland sites. The annual emissions from arable sites were significantly greater than those that would be predicted by IPCC default emission factors. Variability of N2O emissions within sites that occurred as a result of manipulation treatments was greater than that resulting from site-to-site and year-to-year variation, highlighting the importance of management interventions in contributing to greenhouse gas mitigation.

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Subjects: Others > Agriculture-Farming, Production, Technology, Economics
Others > Fertilizer Applications
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 16 Jan 2014 05:34
Last Modified: 16 Jan 2014 09:11
URI: http://oar.icrisat.org/id/eprint/7323
Official URL: http://dx.doi.org/10.5194/bg-10-2671-2013
Projects: European Union’s Framework 6 Integrated Project NitroEurope
Funders: European Union
Acknowledgement: The authors wish to acknowledge funding from the European Union’s Framework 6 Integrated Project NitroEurope (Contract No. 017841) and matched national research funding for financial support.
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