Valuation of diets in dairy herds: state of play and factors explaining the differences between theoretical and observed production

A Lefevre, Lise Boulet, Virginie Decruyenaere, Leen Vandaele, Benoit Verriele, Eddy Decaesteker, Dominique Gavillon, Johan Mahieu, Benoit Rouillé, Eric Froidmont

Onderzoeksoutput: Bijdrage aan congresPaperpeer review


The observations in the field show that milk production of dairy herds is consistent with the composition of the rations distributed, but that there is nevertheless a high degree of variability between farms. In order to understand this variability, French (Avenir Conseil Elevage) and Belgian (Inagro) datasets, set up within the INTERREG PROTECOW project, were used (n = 1604). These datasets contain data on milk production (production and contents) in relation to diets distributed (centesimal composition) in the French-Belgian crossborder area. The use efficiency of the diet was calculated as the ratio between the observed milk production and the expected milk production, estimated according to the composition of the distributed ration. A principal component analysis completed by clustering was used to create four homogeneous groups. Each group differed from the others in terms of milk production level, milk composition (fat and protein contents), type of diet (proportions of forages, concentrates, type of forages) and its use efficiency, the latter being different between each group (P < 0,001). Thus, the first group was characterised by silage maize rations, the second by milk production based on concentrates, the third by rations based on pasture and the fourth by mixed rations. While the use efficiency of the diet reached 120,0% in the silage maize group, it varied from 85,3% to 95,0% in the other three groups. The analysis of the productions observed in practical conditions shows that there is room for improvement in the adaptation and utilisation of dairy cow diets and that, based on the current feeding system, the type of ration has an influence on the observed vs expected milk production ratio.
Vertaalde titel van de bijdrageValuation of diets in dairy herds: state of play and factors explaining the differences between theoretical and observed production
Oorspronkelijke taalFrans
Aantal pagina’s6
PublicatiestatusGepubliceerd - dec-2022
EvenementRencontre Recherche Ruminant - Parijs, Frankrijk
Duur: 7-dec-20228-dec-2022
Congresnummer: 26


CongresRencontre Recherche Ruminant
Verkorte titel3R
Internet adres

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