Analyser une transition agro-alimentaire par les flux d'azote : Aussois un cas d'étude du découplage progessif 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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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 progessif de la production et de la consommation. Revue d'économie régionale et urbaine, Armand Colin, 2017, 2017 (5), pp.967--990. ⟨hal-01686319⟩

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