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Initial insights on the performances and management of dairy cattle herds combining two breeds with contrasting features

Published online by Cambridge University Press:  18 January 2016

M. A. Magne ,
V. Thénard  and
S. Mihout
M. A. Magne*
Affiliation:
ENFA, UMR 1248 AGIR, F-31326 Castanet-Tolosan, France INRA, UMR 1248 AGIR, F-31326 Castanet-Tolosan, France
V. Thénard
Affiliation:
INRA, UMR 1248 AGIR, F-31326 Castanet-Tolosan, France
S. Mihout
Affiliation:
INRA, UMR 1248 AGIR, F-31326 Castanet-Tolosan, France
*
†E-mail: [email protected]
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Abstract

Finding ways of increasing animal production with low external inputs and without compromising reproductive performances is a key issue of livestock systems sustainability. One way is to take advantage of the diversity and interactions among components within livestock systems. Among studies that investigate the influence of differences in animals’ individual abilities in a herd, few focus on combinations of cow breeds with contrasting features in dairy cattle herds. This study aimed to analyse the performances and management of such multi-breed dairy cattle herds. These herds were composed of two types of dairy breeds: ‘specialist’ (Holstein) and ‘generalist’ (e.g. Montbeliarde, Simmental, etc.). Based on recorded milk data in southern French region, we performed ANOVA: (i) to compare the performances of dairy herds according to breed-type composition: multi-breed, single specialist breed or single generalist breed and (ii) to test the difference of milk performances of specialist and generalist breed cows (n = 10 682) per multi-breed dairy herd within a sample of 22 farms. The sampled farmers were also interviewed to characterise herd management through multivariate analysis. Multi-breed dairy herds had a better trade-off among milk yield, milk fat and protein contents, herd reproduction and concentrate-conversion efficiency than single-breed herds. Conversely, they did not offer advantages in terms of milk prices and udder health. Compared to specialist dairy herds, they produce less milk with the same concentrate-conversion efficiency but have better reproductive performances. Compared to generalist dairy herds, they produce more milk with better concentrate-conversion efficiency but have worse reproductive performances. Within herds, specialist and generalist breed cows significantly differed in milk performances, showing their complementarity. The former produced more milk for a longer lactation length while the latter produced milk with higher protein and fat contents and had a slightly longer lactation rank. Our results also focus on the farmers’ management of multi-breed dairy herds underlying herd performances. Three strategies of management were identified and structured along two main axes. The first differentiates farmers according to their animal-selection practices in relation with their objectives of production: adapting animal to produce milk with low-feeding inputs v. focussing on milk yield trait to intensify milk production. The second refers to the purpose farmers give to multi-breed dairy herds: milk v. milk/meat production. These initial insights on the performances and management of multi-breed dairy herds contribute to better understanding the functioning of ruminant livestock systems based on individual variability.

Keywords

functional diversitylivestock farming systemperformance trade-offsdairy breedagroecology
Type
Research Article
Information
animal , Volume 10 , Supplement 5 , May 2016 , pp. 892 - 901
Copyright
© The Animal Consortium 2016 

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