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Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk

Author

Listed:
  • F. Jílek

    (Department of Veterinary Science, Czech University of Agriculture, Prague, Czech Republic)

  • D. Řehák

    (Research Institute of Animal Production, Prague, Czech Republic)

  • J. Volek

    (Research Institute of Animal Production, Prague, Czech Republic)

  • M. Štípková

    (Research Institute of Animal Production, Prague, Czech Republic)

  • E. Němcová

    (Research Institute of Animal Production, Prague, Czech Republic)

  • M. Fiedlerová

    (Research Institute of Animal Production, Prague, Czech Republic)

  • R. Rajmon

    (Department of Veterinary Science, Czech University of Agriculture, Prague, Czech Republic)

  • D. Švestková

    (Department of Veterinary Science, Czech University of Agriculture, Prague, Czech Republic)

Abstract

The objective of this study was to determine how non-nutritional factors such as herd, parity, days in milk, milk production, and milk components affect the concentration of milk urea. A retrospective, observational study comprising analyses of individual cow records from monthly dairy herd improvement milk tests including milk urea tests was conducted. Six commercial Holstein dairy herds were involved in the investigation from October 2000 to September 2003. The data were evaluated using the mixed linear model with repeated measures, and parameters were estimated by the REML method. Significant differences in milk urea concentrations were observed between herds (P < 0.0001), with a significant variability between test dates within herds. Significant effects of parity (P = 0.0003), days in milk (P < 0.0001), and their interaction were also found. Higher concentrations of milk urea were determined in the cows on the first and second parity (5.63 and 5.62 mmol/l, respectively) compared to the groups of cows on the third and fourth parity (5.47 mmol/l). It was found that milk urea concentration increased with the square of milk yield (P < 0.0001), while a negative quadratic relationship was found between milk urea concentration and milk fat % (P < 0.0001). It was concluded that milk urea concentration should be evaluated in association with days in milk, milk yield, milk fat %, and milk protein %.

Suggested Citation

  • F. Jílek & D. Řehák & J. Volek & M. Štípková & E. Němcová & M. Fiedlerová & R. Rajmon & D. Švestková, 2006. "Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 51(12), pages 510-517.
  • Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:12:id:3971-cjas
    DOI: 10.17221/3971-CJAS
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    Citations

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    Cited by:

    1. D. Řehák & R. Rajmon & M. Kubešová & M. Štípková & J. Volek & F. Jílek, 2009. "Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(5), pages 193-200.
    2. M. Czauderna & J. Kowalczyk, 2012. "Simple, selective, and sensitive measurement of urea in body fluids of mammals by reversed-phase ultra-fast liquid chromatography," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 57(1), pages 19-27.
    3. K. Yazgan & J. Makulska & A. Węglarz & E. Ptak & M. Gierdziewicz, 2010. "Genetic relationship between milk dry matter and other milk traits in extended lactations of Polish Holstein cows," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(3), pages 91-104.
    4. O. Hanuš & J. Frelich & M. Tomáška & M. Vyletělová & V. Genčurová & J. Kučera & J. Třináctý, 2010. "The analysis of relationships between chemical composition, physical, technological and health indicators and freezing point in raw cow milk," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(1), pages 11-29.
    5. D. Řehák & J. Volek & L. Bartoň & Z. Vodková & M. Kubešová & R. Rajmon, 2012. "Relationships among milk yield, body weight, and reproduction in Holstein and Czech Fleckvieh cows," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 57(6), pages 274-282.

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