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Valorisation par les vaches laitières de mélanges céréales/protéagineux fermiers dans une ration hivernale

Abstract : We compared the use of three farm grown cereal/protein mixes (oat/fava bean, barley/lupin, triticale/pea), that were used to complement lactating dairy cow diets based on hay consisting of alfalfa/orchard grass and perennial grassland. The trial took place in 2007 at the INRA experimental station of Mirecourt, where an organic mixed-crop dairy system is being prototyped. The experiment was carried out in a Latin square with three groups of eight cows (50% Holstein, 50% Montbéliarde). The cows were fed 4 kg/cow/day of one of the three cereal/protein mixes, 8 kg DM/cow/day of alfalfa/orchard grass hay, and permanent grassland hay ad libitum. The three diets were indicative of the animals’ needs. Diets had no significant effect on milk production (20.3 kg/cow/d) and milk fat content (41.3 g/kg). However, dairy cows fed with the oat/fava bean mix had a significantly lower protein content in their milk. This is the result of: (i) a nitrogen surplus in relation to energy, and (ii) a lower starch content compared to the two other diets. Therefore, in organic mixed-crop dairy systems with forages that are rich in nitrogen, the choice to cultivate mixtures of cereal/pulses and the composition of these mixtures must be primarily based on their agronomic interest and not on their zootechnical one since they are not essential to a balanced animal diet.
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  • HAL Id : hal-02664235, version 1
  • PRODINRA : 28161

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Xavier Coquil, Jean-Marie Trommenschlager, Claude Bazard, Ségolène Despres, Luc Delaby. Valorisation par les vaches laitières de mélanges céréales/protéagineux fermiers dans une ration hivernale. Innovations Agronomiques, INRAE, 2009, 4, pp.145-149. ⟨hal-02664235⟩

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