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Effects of season and time of milking on spontaneous and induced lipolysis in bovine milk fat

Author

Listed:
  • Renáta TOUŠOVÁ

    (Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Sources, Czech University of Life Sciences Prague, Prague-Suchdol, Czech Republic)

  • Luděk STÁDNÍK

    (Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Sources, Czech University of Life Sciences Prague, Prague-Suchdol, Czech Republic)

  • Jaromír DUCHÁČEK

    (Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Sources, Czech University of Life Sciences Prague, Prague-Suchdol, Czech Republic)

Abstract

The effects were evaluated of different factors on the level of spontaneous (SPO) and induced (IND) lipolysis as defined by the content of free fatty acids (FFA) in milk. Milk samples were collected at monthly intervals throughout the year from both morning and evening milkings either individually in a milking parlour (SPO; n = 10) or from the bulk tank (IND; n = 10). The data were analysed using SAS 9.1. More intensive SPO was observed from March to May with higher FFA contents (+0.034 to +0.523 mmol/100 g of fat; P < 0.05-0.01), and also from September to November (+0.077 to +0.292 mmol/100 g of fat; P < 0.05). More intensive SPO was also detected in the evening milk than in that coming from morning milking (+0.062 to +0.556 mmol/100 g of fat; P < 0.05-0.01). SPO measured immediately after milking was affected by the season and time of milking. The content of FFA characterising IND in bulk milk (0.33-1.10 mmol/100 g of fat) was higher (P < 0.05-0.001) than that due to SPO in individual samples (0.21-0.86 mmol/100 g of fat), especially in those from evening milking compared to morning milking (+0.10 to +0.47 vs. +0.12 to +0.22 mmol/100 g of fat; P < 0.05-0.001).

Suggested Citation

  • Renáta TOUŠOVÁ & Luděk STÁDNÍK & Jaromír DUCHÁČEK, 2013. "Effects of season and time of milking on spontaneous and induced lipolysis in bovine milk fat," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 31(1), pages 20-26.
    • Handle: RePEc:caa:jnlcjf:v:31:y:2013:i:1:id:9-2012-cjfs
    DOI: 10.17221/9/2012-CJFS
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    References listed on IDEAS

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