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Master Thesis

Étude des relations entre les conduites alimentaires et les performances zootechniques de la chèvre laitière avec le taux d'urée du lait dans le secteur Rhône-Alpin

Abstract : The rate of urea of the milk is an indicator which arouses an interest growing in the caprine sector by its potential of evaluation of the food strategy. Used since few last years in herd management of dairy cows, the urea is a useful tool to estimate the balance between the contribution of energy and nitrogen, this balance is essential for an efficient feeding and an optimal dairy production. The study is realized from data stemming from eighteen business concerns of Rhône-Alpes. The purpose is to search for the dietary factors (DMI, PDI, Crude Protein, PDI, etc.) and non-food factors (Breed, Season, Stage of lactation, milk yield, BCS, etc.) susceptible to affect the rate of urea milk, to be able to use him as help to the diagnosis on food conduct.Only one link between could be found: between milk urea and the parameter "month of the year" allowing to explain 50% of the variations of the urea. This correlation is difficult to explain in view of the absence of the link between the urea and the dietary factors. Indeed, goat feeding is often too rich in nitrogen, what returns the too low food effect of the variations of balance sheets and thus not impacting. The study did not allow to propose unique and practical references for an effective management of the usable food in the technical advice. The urea indicator remains an additional tool to use in the analysis of technical and economical food management of the goat herd, in connection with the other usual factors.
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Submitted on : Wednesday, December 7, 2016 - 4:21:37 PM
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Manon Gabarret. Étude des relations entre les conduites alimentaires et les performances zootechniques de la chèvre laitière avec le taux d'urée du lait dans le secteur Rhône-Alpin. Sciences du Vivant [q-bio]. 2016. ⟨dumas-01411681⟩

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