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Emissions of Volatile Organic Compounds (VOCs) from soil to the atmosphere according to agricultural land-uses. Interrelationships between SOM, microbial diversity and VOCs fluxes

Abstract : Soil microorganisms are key players in soil functioning. Indeed these organisms are responsible for the decomposition of Soil Organic Matters (SOM) and deliver nutrients readily accessible to plants. While the biodegradation of SOM releases CO 2 and CH 4 to the atmosphere, it has CONTEXT Microorganisms CH 4 Atmosphere Soil Soil Organic Matter (SOM) CO 2 biodegradation VOCs VOCs ? 1. Determination of the VOC emission spectrum according to different agricultural land uses : i. Conventional cropping: Organic or Mineral Nitrogen fertilization ii. Meadows 2. Understand the link between SOM, active soil microorganisms and VOCs and greenhouse gases (CO 2 , N 2 O, CH 4) emissions been recently shown that microbial SOM biodegradation generates Volatile Organic Compounds (VOCs) which take part in greenhouse gases and secondary organic aerosols production. The VOC emission rates from soil to atmosphere in agricultural landscapes are still poorly documented compared to CO 2 and CH 4 fluxes. The objectives of this presenation were : 1. Determination of the VOC emission spectrum according to different agricultural land uses : 1.1. Conventional cropping: Organic or Mineral Nitrogen fertilization 1.2. Meadows 2.Understand the link between SOM, active soil microorganisms and VOCs and greenhouse gases (CO2, N2O, CH4) emissions
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Kevin Potard, Cécile Monard, A Le Moigne, Nathalie Le Bris, Jean-Pierre Caudal, et al.. Emissions of Volatile Organic Compounds (VOCs) from soil to the atmosphere according to agricultural land-uses. Interrelationships between SOM, microbial diversity and VOCs fluxes. Bageco - 13th Symposium on Bacterial Genetics and Ecology, Jun 2015, Milan, Italy. ⟨hal-01273064⟩

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