Marie-Angélina Magne

Cette synthèse dresse un état des lieux des connaissances sur les systèmes et territoires pastoraux en France au prisme des principaux enjeux qui les traversent. Le repli pastoral en situation d’intensification de la production et d’agrandissement des troupeaux, l’adaptation au changement climatique et aux fluctuations des marchés, ou encore le retour de prédateurs sauvages sont particulièrement discutés. Cinq champs de recherche prioritaires ont été dégagés : l’animal en milieu pastoral ; le pastoralisme comme modèle d’agroécologie avec ses forces et ses faiblesses ; les territoires pastoraux multi-acteurs, espaces de confrontation et de projets collectifs ; les métiers du pastoralisme et leur attractivité ; les données issues des méthodes de suivi de l’évolution des végétations, de la biodiversité et des systèmes d’élevage. Bien des sujets font écho avec les situations pastorales du reste du monde, notamment en Afrique de l’Ouest, sans pour autant les recouvrir exactement.

Organic mixed livestock farming offers a range of potential benefits for the environment. Due to the diversification of enterprises, this farming system can be associated with a high workload, which means that it could be socially unsustainable. The aim of this study was to understand and explain work satisfaction of farmers running an organic mixed livestock farm. Using a mixed-method approach, quantitative and qualitative data were collected from 102 farmers in seven European countries during face-to-face interviews. We showed for the first time that across Europe and different animal species and category combinations, organic mixed livestock farms can provide a high work satisfaction, despite a high workload. By using a mixed-method approach and a clear framework, we aimed at better understanding work satisfaction. Underlying reasons for work satisfaction included the diversity of tasks, opportunities to learn, autonomy in the work schedule, perceived acknowledgement by consumers, and the contribution to sustainable food production. Factors contributing to work satisfaction identified in the analysis of quantitative data included workload, number of livestock units, mental complexity, proportion of work peaks per year, and the match between wanted free time and time taken off work. The combination of qualitative and quantitative data allowed a deeper understanding of farmers’ work satisfaction and revealed consistent findings. Future research should investigate the relationship between farmers’ work satisfaction and capacity for innovation, flexibility, and adaptation potential.

Using three-breed rotational crossbreeding in a purebred Holstein (HO) herd raises two questions: Do the different genetic classes of cows generated by crossbreeding perform differently? Are there any economic benefits of combining them within a herd? This study aimed at comparing the performance between the different genetic classes resulting from the use of three-breed rotational crossbreeding, and simulating the effect of combining them on herd profitability. Based on a dataset of 14 French commercial dairy herds using three-bred rotational crossbreeding from a HO herd over a 10-year period, we defined three genetic classes according to the theoretical value of heterosis and the percentage of HO genes. We performed linear models and estimated least square means to compare HO cows and the first and second generation of crosses (F₁ and G₂, respectively) on eight performance characteristics related to milk yield and solids, udder health and fertility. We used these to simulate profitability of five herd compositions differing according to HO, F₁ and G₂ proportions. We showed that HO, F₁ and G₂ cows had different and complementary performance profiles. HO had a win-lost trade-off between milk yield and fertility, G₂ had the opposite trade-off and F₁ had a win-win trade-off. Differences regarding milk solids and udder health were less clear-cut. We highlighted that combining HO with F₁ or with both F₁ and G₂ (below 30%) could be more profitable than using purebred HO or crossbred herds in a conventional milk price scenario. These findings provide evidence on the benefits of functional diversity generated from the use of dairy crossbreeding in dairy herds.

La biodiversité, et en particulier la diversité animale que l’éleveur choisit d’élever, est présentée comme un levier prometteur pour la transition agroécologique et la résilience des systèmes d’élevage. Or, les travaux traitant de cette question sont peu nombreux, récents et épars. Cet article vise à développer un cadre conceptuel pour analyser de manière intégrée la diversité animale et ses modalités de gestion à l’échelle des systèmes d’élevage et à proposer des pistes de recherche pour y contribuer. Ce cadre est structuré en quatre composantes : i) les formes que recouvre la diversité animale, ii) les niveaux organisationnel et temporel auxquels elle se construit et s’exprime, iii) ses modes de gestion et iv) les bénéfices retirés par l’éleveur. Quatre études de recherche contrastées en termes de diversité animale analysée ont été revisitées au travers du cadre conceptuel proposé. Leur relecture et leur analyse transversale montrent l’intérêt d’articuler les quatre composantes du cadre pour raisonner de manière intégrée la gestion de la diversité animale en élevage afin d’en tirer parti sur le long terme. Elles permettent aussi d’identifier trois fronts de recherche à investiguer conjointement : affiner la caractérisation de la diversité animale en élevage, mieux caractériser ses modes de gestion y compris ses déterminants et approfondir l’évaluation des différents bénéfices retirés de sa gestion. Des pistes d’utilisation du cadre en recherche, en enseignement et dans conseil en élevage sont enfin proposées.

Stakeholders from academic, political, and social spheres encourage the development of more sustainable forms of agriculture. Given its scale and scope, the sustainability transition is a challenge to the entire agricultural sector. The main question is, how to support the transition process? In this article, we explore how agricultural science can address the sustainability transition of farming systems to understand and support transition processes. We discuss the potential for articulating three research approaches: comprehensive analysis, co-design, and simulation modeling. Comprehensive analysis of the sustainability transition provides perspectives on the interplay between resources, resource management, and related performances of farming systems on the one hand and technical, economic, and sociocultural dimensions of change on the other. Co-design of the sustainability transition stimulates local-scale transition experiments in the real world and identification of alternatives for change. Simulation modeling explores future-oriented scenarios of management at multiple levels and assesses their impacts. We illustrate the articulation of research approaches with two examples of research applied to agricultural water management and autonomy in crop-livestock systems. The resulting conceptual framework is the first one developed to organize research to understand and support the sustainability transition of farming systems.