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Le pluralisme des voies d’écologisation de la gestion des biomasses résiduaires en agriculture : analyse à partir des réseaux métaboliques et étude de cas dans la vallée de la Drôme

Abstract : Abstract: Residual biomass (RB) (e.g. livestock effluents, crop residues, green and urban waste) plays a key role in agriculture. The modernization of agriculture since the 19th century has profoundly transformed their metabolism, leading to soil impoverishment, pollution and loss of autonomy of farms and territories in terms of fertilization.Today, solid scientific facts prove the need for an ecologization of RB management, but the nature of this ecologization is debated. Radically different visions of what should be the biophysical basis of the functioning of our societies coexist and put our human and scientific communities in tension. This thesis aims to provide an analytical framework for a dialogue between the multiple pathways of ecologization: the metabolic networks. The study was conducted in the Drôme valley, a region well knowned for the development of organic agriculture. The cartography of production and flows of RB as well as the description of the multiple values given by farmers to the metabolism of RB allow us to think the tensions and complementarities between two contrasting paths of ecologization: the engineering path of optimization and "closing the loop" (industrial ecology) and cultivating bounds with the rest of the living through multiple values, beyond economic utilitarianism (the earthbound).This thesis draws up the perspectives of a more pragmatic path towards ecologization.
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Submitted on : Monday, May 10, 2021 - 4:11:03 PM
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Andréa-Wiktor Gabriel. Le pluralisme des voies d’écologisation de la gestion des biomasses résiduaires en agriculture : analyse à partir des réseaux métaboliques et étude de cas dans la vallée de la Drôme. Sciences agricoles. Université Paris-Saclay, 2021. Français. ⟨NNT : 2021UPASB017⟩. ⟨tel-03223081⟩

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