Nitrous oxide emissions from crop rotations including wheat, oilseed rape and dry peas
| Autor: | Catherine Hénault, Pierre Cellier, Marie-Hélène Jeuffroy, Edouard Baranger, M. Gosme, E. de Chezelles, Anne Schneider, Benoît Carrouée |
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| Přispěvatelé: | Agronomie, AgroParisTech-Institut National de la Recherche Agronomique (INRA), Unité de recherche Science du Sol (USS), Institut National de la Recherche Agronomique (INRA), Environnement et Grandes Cultures (EGC), CASDAR 7-175, Institut National de la Recherche Agronomique (INRA)-AgroParisTech |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences
Crop residue 010504 meteorology & atmospheric sciences Field experiment lcsh:Life canola 01 natural sciences Crop blé lcsh:QH540-549.5 pisum sativum Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Earth-Surface Processes 2. Zero hunger lcsh:QE1-996.5 rotation des cultures Soil classification 04 agricultural and veterinary sciences 15. Life on land Crop rotation lcsh:Geology lcsh:QH501-531 fertilisation azotée Agronomy pois colza graine 13. Climate action émission d'azote Greenhouse gas Soil water 040103 agronomy & agriculture Nitrogen fixation 0401 agriculture forestry and fisheries Environmental science lcsh:Ecology fertilisation culture |
| Zdroj: | Biogeosciences Discussions Biogeosciences Discussions, European Geosciences Union, 2013, 10 (3), pp.1787-1797. ⟨10.5194/bg-10-1787-2013⟩ Biogeosciences 3 (10), 1787-1797. (2013) Biogeosciences, Vol 10, Iss 3, Pp 1787-1797 (2013) |
| ISSN: | 1810-6277 1810-6285 |
| DOI: | 10.5194/bg-10-1787-2013⟩ |
| Popis: | Approximately 65% of anthropogenic emissions of N2O, a potent greenhouse gas (GHG), originate from soils at a global scale, and particularly after N fertilisation of the main crops in Europe. Thanks to their capacity to fix atmospheric N2 through biological fixation, legumes can reduce N fertilizer use, and possibly N2O emissions. Nevertheless, the decomposition of crop organic matter during the crop cycle and residue decomposition, and possibly the N fixation process itself, could lead to N2O emissions. The objective of this study was to quantify N2O emissions from a dry pea crop (Pisum sativum, harvested at maturity) and from the subsequent crops in comparison with N2O emissions from wheat and oilseed rape crops, fertilized or not, in various rotations. A field experiment was conducted over 4 consecutive years to compare the emissions during the pea crop, in comparison with those during the wheat (fertilized or not) or oilseed rape crops, and after the pea crop, in comparison with other preceding crops. N2O fluxes were measured using static chambers. In spite of low N2O fluxes, mainly due to the site's soil characteristics, fluxes during the crop were significantly lower for pea and unfertilized wheat than for fertilized wheat and oilseed rape. The effect of the preceding crop was not significant, while soil mineral N at harvest was higher after the pea crop. These results should be confirmed over a wider range of soil types. Nevertheless, they demonstrate the absence of N2O emissions linked to the symbiotic N fixation process, and allow us to estimate the decrease in N2O emissions by 20–25% through including one pea crop in a three-year rotation. On a larger scale, this reduction of GHG emissions at field level has to be added to the decrease due to the reduced production and transport of the N fertilizer not applied to the pea crop. |
| Databáze: | OpenAIRE |
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