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Quelles évolutions possibles pour les systèmes de polyculture-élevage ? Résultats d’ateliers participatifs et de modélisation dans quatre régions françaises

Abstract : Crop-livestock systems can use complementarities between crops and livestock to reduce their input consumption. In four French regions, expert meetings were organized to discuss the possible evolution of these systems according to three contrasting prospective scenarios: “Ultra-liberalization and globalization” (S1), “Territorial economy and refocusing on quality” (S2) and “Agro-ecological and energy transition” (S3), and to reflect on possible modalities to support crop-livestock systems in each of the scenarios. To support these discussions, the impacts of the structuring elements of the scenarios were simulated using the Orfee bio-economic model for a typical crop-livestock farm in each region. The experts agreed that S1 would lead to a reduction in livestock production and greater specialization in field crops, S2 would be the most favourable to diversified systems and S3 would lead to a reduction in livestock production, but with greater integration between livestock and crops. The results of the simulations go in the same direction, except for milk production, which increases in S1 due to the forecast increase in milk prices and non-limiting labour force. The simulations were used to calculate sustainability indicators: S1 is better for economic indicators, S2 better for social indicators and S3 more favourable to the environment. The simulations also highlight the need to maintain livestock farming in an agro-ecological transition to reduce mineral fertilizers and pesticides.
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https://hal.inrae.fr/hal-03104100
Contributor : Sabine Rossi <>
Submitted on : Tuesday, June 8, 2021 - 8:35:27 AM
Last modification on : Thursday, June 17, 2021 - 1:50:01 PM

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Claire Mosnier, Nelly Dubosc, Ikram Abdouttalib, Dominique Candau, Yannick Carel, et al.. Quelles évolutions possibles pour les systèmes de polyculture-élevage ? Résultats d’ateliers participatifs et de modélisation dans quatre régions françaises. Cahiers Agricultures, EDP Sciences, 2020, 29, pp.30. ⟨10.1051/cagri/2020028⟩. ⟨hal-03104100⟩

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