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Key indicators and decision-making trees to analyse reproduction problems linked to environmental factors: data from a commercial dairy unit

Published online by Cambridge University Press:  22 November 2017

E Knapp ,
P Chapaux ,
L Istasse  and
K Touati
E Knapp
Affiliation:
Nutrition Unit, Department of Animal Production, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium
P Chapaux
Affiliation:
Association Wallonne de l’Elevage, 5590 Ciney, Belgium
L Istasse*
Affiliation:
Nutrition Unit, Department of Animal Production, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium
K Touati
Affiliation:
Ruminants and pigs clinics, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium
*
Email: listasse@ulg.ac.be
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Extract

Reproduction performances in cattle regularly decreased with time. For example, the number of inseminations per pregnancy increased in dairy herds from 1.43 to 1.75 and the calving interval (CI) from 385 to 412 days in 10 years (Leroy et al., 2006). Such a reduction is responsible for rising income losses for breeders. In Belgium, an increase of the age at first calving (AFC) by 3 months and of the CI by 20 days induced a gross margin reduction of about 500 € /cow/year.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2009 , April 2009 , pp. 14
Copyright
Copyright © The British Society of Animal Science 2009

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References

Leroy, J.L.M.R., de Kruif, A. 2006. Vlaam. Diergeneeskd. Tijdschr., 75, 55–60.Google Scholar