|
|||||
|
|
Carbon, nitrogen and Greenhouse gases budgets over a four years crop rotation in northern France |
|
| Authors: | Benjamin Loubet Patricia Laville Simon Lehuger Eric Larmanou Christophe Fl??chard Nicolas Mascher Sophie Genermont Romain Roche Rossana M Ferrara Patrick Stella Erwan Personne Brigitte Durand C??line Decuq Dominique Flura Sylvie Masson Olivier Fanucci Jean-No?l Rampon Jan Siemens Reimo Kindler Benoit Gabrielle Marion Schrumpf Pierre Cellier |
| Institution: | 1. INRA, AgroParisTech, UMR 1091 EGC, Environnement et Grandes Cultures, 78850, Thiverval-Grignon, France 5. Now at Agroscope Reckenholz-T?nikon Research Station ART, Air pollution/Climate Group, Reckenholzstrasse 191, 8046, Zurich, Switzerland 2. INRA, Soils, Agro-hydrosystems and Spatialization (SAS) Research Unit, 65, rue de St-Brieuc, 35042, Rennes Cedex, France 3. Agricultural Research Council??Research Unit for cropping systems in dry environments (CRA?CSCA), Via Celso Ulpiani, 5?C70125, Bari, Italy 9. Agricultural Research Council??Research Centre for Agrobiology and Pedology (CRA-ABP), Piazza D??Azeglio 30, 50121, Florence, Italy 4. Chair of Soil Science, Technische Universit?t Berlin, Salzufer 12, 10587, Berlin, Germany 6. Institute of Crop Science and Resource Conservation, Soil Science, University of Bonn, Nussallee 13, 53115, Bonn, Germany 7. Chair of Waste Management and Environmental Research, Technische Universit?t Berlin, Franklinstrasse 29, 10587, Berlin, Germany 8. Max-Planck-Institute for Biogeochemistry, Hans-Kn?ll-Strasse 10, 07745, Jena, Germany |
| Abstract: | Croplands mainly act as net sources of the greenhouse gases carbon dioxide (CO2) and nitrous oxide (N2O), as well as nitrogen oxide (NO), a precursor of troposheric ozone. We determined the carbon (C) and nitrogen (N) balance of a four-year crop rotation, including maize, wheat, barley and mustard, to provide a base for exploring mitigation options of net emissions. The crop rotation had a positive net ecosystem production (NEP) of 4.4?±?0.7 Mg C ha-1 y-1 but represented a net source of carbon with a net biome production (NBP) of -1.3?±?1.1 Mg C?ha-1 y-1. The nitrogen balance of the rotation was correlated with the carbon balance and resulted in net loss (?24?±?28 kg N ha-1 y-1). The main nitrogen losses were nitrate leaching (?11.7?±1.0 kg N ha-1 y-1) and ammonia volatilization (?9 kg N ha-1 y-1). Dry and wet depositions were 6.7?±?3.0 and 5.9?±0.1 kg N ha-1 y-1, respectively. Fluxes of nitrous (N2O) and nitric (NO) oxides did not contribute significantly to the N budget (N2O: -1.8?±?0.04; NO: -0.7?±?0.04 kg N ha-1 y-1) but N2O fluxes equaled 16% of the total greenhouse gas balance. The link between the carbon and nitrogen balances are discussed. Longer term experiments would be necessary to capture the trends in the carbon and nitrogen budgets within the variability of agricultural ecosystems. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |