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Analyser une transition agro-alimentaire par les flux d’azote : Aussois un cas d’étude du découplage progressif de la production et de la consommation

Abstract : We reconstructed the one-century evolution of the agri-food system of the municipality of Aussois. We considered the nitrogen and money flows. Two periods are distinguished: from 1925 to 1965, characterized by autonomous agro-pastoral systems, while the second period from 1965 to the present, is defined by specialized and intensive grazing systems with an autonomy of 67%. Nitrogen use efficiency almost no changes between the two periods. Only 10% of nitrogen inputs are fixed in the products of the first period and 11% for the second period. Productivity, or the amount of products produced by surface is multiplied by 2.5 to reach today 7.2 kg N/ha/year. Finally, there is an opening of the nitrogen cycle and an economic transition from a low cash flow closely linked to nitrogen flow, to a significant cash flows independent of nitrogen flow.
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https://hal-agroparistech.archives-ouvertes.fr/hal-03691890
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Submitted on : Thursday, June 9, 2022 - 2:25:59 PM
Last modification on : Saturday, June 25, 2022 - 3:38:52 AM

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Thierry Bonaudo, Gilles Billen, Josette Garnier, Fabienne Barataud, Sabine Bognon, et al.. Analyser une transition agro-alimentaire par les flux d’azote : Aussois un cas d’étude du découplage progressif de la production et de la consommation. Revue d'économie régionale et urbaine, Armand Colin, 2018, Décembre (5), pp.967-991. ⟨10.3917/reru.175.0967⟩. ⟨hal-03691890⟩

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