Differences in whey protein content between cow's milk collected in late pasture and early indoor feeding season from conventional and organic farms in Poland

Authors

  • Beata Kuczyńska,

    Corresponding author
    1. Cattle Breeding Department, Faculty of Animal Science, Warsaw University of Life Sciences, 02-786 Warsaw, Poland
    • Cattle Breeding Department, Faculty of Animal Science, Warsaw University of Life Sciences, 02-786 Warsaw, Poland.
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  • Kamila Puppel,

    1. Cattle Breeding Department, Faculty of Animal Science, Warsaw University of Life Sciences, 02-786 Warsaw, Poland
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  • Marcin Gołȩbiewski,

    1. Cattle Breeding Department, Faculty of Animal Science, Warsaw University of Life Sciences, 02-786 Warsaw, Poland
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  • Ewa Metera,

    1. Animal Science Department, Institute of Genetics and Animal Breeding, Polish Academy of Science, Jastrzȩbiec, 05-552 Wólka Kosowska, Poland
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  • Tomasz Sakowski,

    1. Animal Science Department, Institute of Genetics and Animal Breeding, Polish Academy of Science, Jastrzȩbiec, 05-552 Wólka Kosowska, Poland
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  • Krzysztof Słoniewski

    1. Animal Science Department, Institute of Genetics and Animal Breeding, Polish Academy of Science, Jastrzȩbiec, 05-552 Wólka Kosowska, Poland
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Abstract

BACKGROUND: The aim of the study was to investigate bioactive whey protein concentrations in cow's milk collected in late pasture (LP) and early indoor feeding (EIF) season from conventional and organic farms in Poland.

RESULTS: Results showed that in the LP somatic cell count (SCC) was higher under organic farming conditions. However, percentages of protein and fat were higher under conventional farming conditions. In EIF, milk from conventional dairy farms had a higher percentage of fat and lactose and a lower concentration of protein and SCC in comparison to milk from organic farms. Organic milk in LP had higher concentrations of beneficial whey proteins than conventional milk, including β-lactoglobulin (β-Lg, 4.12 vs. 2.68 g L−1), lactoferrin (Lf, 334.99 vs. 188.02 mg L−1), and lysozyme (Lz, 15.68 vs. 12.56 µg L−1). However, conventional milk in EIF had higher concentrations of bovine serum albumin (146.47 vs. 118.65 mg L−1), Lf (49 vs. 185.27 mg L−1), and Lz (16.63 vs. 13.22 µg L−1).

CONCLUSIONS: The results show significant differences in the investigated parameters between organic milk and milk from conventional system during EIF and LP. Moreover, extending the pasture season during EIF in organic farms decreases concentration of bioactive compounds of milk. Copyright © 2012 Society of Chemical Industry

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