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Fatty acid content in milk of dairy cows on a diet with high fat content derived from rapeseed

Author

Listed:
  • T. Komprda

    (Department of Food Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic)

  • R. Dvořák

    (University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic)

  • M. Fialová

    (Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Brno, Czech Republic)

  • K. Šustová

    (Department of Food Technology, Mendel University of Agriculture and Forestry, Brno, Czech Republic)

  • A. Pechová

    (University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic)

Abstract

Two groups of dairy cows, Czech Red-pied × Ayrshire × Red Holstein crossbreds, received a diet with either production mixture with rapeseed, rapeseed cakes and rapeseed oil (Energol; E-group; final feed mixture with 62 g of crude fat per kg of dry matter, DM) or control production mixture (C-group; crude fat content in total feed mixture 37 g/kg DM). Milk samples were taken on the 14th, 30th, 60th and 90th day of lactation, and basic milk constituents and fatty acid content in milk fat were determined. E- and C-groups did not differ in either milk yield or yield of milk fat, milk protein and lactose (P > 0.05). Lactose, calcium, milk protein and casein content increased linearly (P < 0.05) with the increasing day of lactation both in E-milk and in C-milk. Casein content in E-milk was lower (P < 0.05) than in C-milk but total lipid content did not differ (P > 0.05) from that in C-milk. Dietary rapeseed decreased (P < 0.05) palmitic acid content in milk by 20 percentage units and at the same time increased (P < 0.05) oleic acid content by 10 percentage units in comparison with control milk; the ratio of total C16/total C18 fatty acids was consequently twice lower (P < 0.01) in E-milk. As far as polyunsaturated fatty acids (PUFA) are concerned, the contents of linoleic acid (LA), α-linolenic acid (LNA) and eicosapentaenoic + docosahexaenoic acid were higher (P < 0.05) in E-milk; however, the PUFAn-6/PUFAn-3 ratio was not different between E- and C-milk. It was concluded that 1 litre of E-milk could provide 20% of both LA and LNA daily requirement.

Suggested Citation

  • T. Komprda & R. Dvořák & M. Fialová & K. Šustová & A. Pechová, 2005. "Fatty acid content in milk of dairy cows on a diet with high fat content derived from rapeseed," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 50(7), pages 311-319.
  • Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:7:id:4172-cjas
    DOI: 10.17221/4172-CJAS
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    Citations

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    Cited by:

    1. M. Pešek & E. Samková & J. Špička, 2006. "Fatty acids and composition of their important groups in milk fat of Czech Pied cattle," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 51(5), pages 181-188.
    2. O. Hanuš & J. Vegricht & J. Frelich & A. Macek & M. Bjelka & F. Louda & L. Janů, 2008. "Analysis of raw cow milk quality according to free fatty acid contents in the Czech Republic," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 53(1), pages 17-30.
    3. R. Bečková & E. Václavková, 2010. "The effect of linseed diet on carcass value traits and fatty acid composition in muscle and fat tissue of fattening pigs," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(8), pages 313-320.
    4. J. Frelich & M. Šlachta & O. Hanuš & J. Špička & E. Samková, 2009. "Fatty acid composition of cow milk fat produced on low-input mountain farms," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(12), pages 532-539.
    5. Z.L. Liu & D.P. Yang & P. Chen & S.B. Lin & X.Y. Jiang & W.S. Zhao & J.M. Li & W.X. Dong, 2008. "Effect of dietary sources of roasted oilseeds on blood parameters and milk fatty acid composition," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 53(5), pages 219-226.

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