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Bilans de gaz à effet de serre en prairies et cultures : méthodologies et résultats

Abstract : Grasslands and crops are both producers and absorbers of greenhouse-effect gases : CO2 and N2O, but CH4 should not be overlooked, especially on grazed pastures, nor should ozone and its precursors. This is a synthesis of the main known factors that affect the flows of greenhouse-effect gases and the storage of carbon. There exist different methods for the measurement of the gas flows from and to crops and grasslands ; they are summarily presented here. Experimental results have shown that these flows vary much in space and time and that they are influenced by many environmental factors (soil, climate) and agricultural practices (fertilizer dressings, tillage, changes in the occupation of the soil, etc.). In order to achieve a pertinent environmental assessment of the agricultural systems, it appears necessary to evaluate the flows of all the greenhouse-effect gases not only at the scale of individual fields, but also at larger scales (farm, small region).
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  • HAL Id : hal-02667329, version 1
  • PRODINRA : 14467


Jean-François J.-F. Soussana, Jean-Louis J.-L. Fiorelli, Pierre Cellier, Patricia P. Laville, Catherine C. Hénault, et al.. Bilans de gaz à effet de serre en prairies et cultures : méthodologies et résultats. Fourrages, 2006, 186, pp.193-204. ⟨hal-02667329⟩



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