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Master Thesis

Effet d’un complément alimentaire stimulateur de la rumination sur le démarrage de la lactation

Abstract : The main goal of this trial was to investigate the effect of a product on the rumination time around calving and on blood parameters with regard to ketosis in cows. In this trial, 26 cows were used and divided into 2 groups. The rumination time was monitored thanks to collars, linked to the milking robot. Cows of the treatment group received 2 times 200 g of the product on the day of calving, at 12 hours intervals. Blood tests determining the blood concentration in ᵝ-hydroxybutyrate were performed 3 times per cow : 7 days before calving, the day of calving and 7 days after calving. The aim of these measurements was to detect cows affected with ketosis. Milk yield and ingestion of concentrate feed were recorded. All cows had a high rumination time and quite low concentration of ketone bodies. The prevalence of ketosis is 23 %, the cows were mainly healthy. No effect of the treatment was found on rumination time, ketosis or ingestion. There was no link between rumination time and ketosis. The milk yield slightly increased in the treatment group compared to the control group. The product seemed to have a limited effect when it is used preventively in cows which have already a high rumination time before calving. The reason for the slightly increase in milk yield in cows treated with the product should be investigated in further studies.
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https://dumas.ccsd.cnrs.fr/dumas-03121713
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Submitted on : Tuesday, January 26, 2021 - 3:38:29 PM
Last modification on : Sunday, February 21, 2021 - 3:22:30 AM
Long-term archiving on: : Tuesday, April 27, 2021 - 7:01:37 PM

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Margaux Jouenne. Effet d’un complément alimentaire stimulateur de la rumination sur le démarrage de la lactation. Sciences du Vivant [q-bio]. 2020. ⟨dumas-03121713⟩

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