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Pol J Vet Sci. 2013;16(2):395-7.

Effect of age and stage of lactation on whey protein content in milk of cows of different breeds.

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Department of Commodity Science and Processing of Raw Animal Materials University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland.


The aim of the study was to determine the effect of age of cows, i.e. subsequent lactation and stage of lactation, on bioactive whey protein content in milk of dairy cows of six primary breeds kept in Poland. In all cases the significant correlations between lactoferrin concentration in milk and stage of lactation was stated. Its content gradually increased with the course of lactation but the changes in the content of this protein were highly dependent on breed of cows, what was indicated also by high interactions between breed and stage of lactation.

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