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Accroître les performances des systèmes d'élevages de chevaux de selle par la mixité avec des bovins allaitants en zones herbagères.

Abstract : In grassland based livestock systems, diversification of animal species is considered a tool allowing a reduced use of inputs. The present thesis aims at comparing practices of grass management, gastrointestinal parasitism management and work organisation of specialised saddle horse breeding systems and mixed saddle horse - beef cattle farming systems, which have been surveyed across two French pasture areas. The investigated mixed farms are on average larger than specialised equine farms. In the northern foothills of Massif Central, mixed farms have a higher farm stocking rate and buy less forage than specialised farms. There is a high land proportion grazed alternately by cattle (main production in this region) then horses. In Normandy, where horses have a higher genetic value, farm stocking rate is identical in both types of systems. Only the plots grazed alternately by horses then cattle (<10% of the total grazed area) are more heavily used than other grazing combinations. Grinding is less used there, as well as in plots grazed simultaneously by both species. Faecal egg counts carried out on young horses from the Massif Central show that those kept on mixed pasture with cattle excrete half as many strongyle eggs as those kept in specialised systems. This dilution effect of equine parasitism by cattle suggests that limiting the use of chemical drugs in mixed systems is possible, while treatments remain systematic in all surveyed farms. Saddle horse breeding requires a very large amount of routine work, due to the individual valorisation of young horses. Beef cattle breeding has little effect on the workload or its organisation. Work does not seem to be a factor preventing the implementation of mixed grazing. The link between analysis of practices, work organisation and economic performance of farms must be further investigated.
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Submitted on : Tuesday, May 19, 2020 - 6:48:53 AM
Last modification on : Friday, October 23, 2020 - 5:03:24 PM


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Louise Forteau. Accroître les performances des systèmes d'élevages de chevaux de selle par la mixité avec des bovins allaitants en zones herbagères.. Agronomie. Université Clermont Auvergne, 2019. Français. ⟨NNT : 2019CLFAC082⟩. ⟨tel-02612241⟩



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