International Journal of Biometeorology

, Volume 32, Issue 3, pp 194–200 | Cite as

Effect of season on milk temperature, milk growth hormone, prolactin, and somatic cell counts of lactating cattle

  • M. O. Igono
  • H. D. Johnson
  • B. J. Steevens
  • W. A. Hainen
  • M. D. Shanklin
Original Articles

Abstract

Monthly fluctuations in milk temperature, somatic cell counts, milk growth hormone and prolactin of lactating cows were measured in milk samples over a 1 year period. The seasonal patterns in milk temperature, somatic cell count and milk prolactin concentration showed a positive trend with increasing environmental temperatures. Milk growth hormone concentration increased with lactation level and declined significantly during summer heat. Milk temperature and the measured hormonal levels may serve as indicators of the impact of the climatic environment on lactating cattle.

Key words

Cow milk temperature Somatic cell counts Milk growth hormone Prolactin Seasonality 

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Copyright information

© International Society of Biometeorology 1988

Authors and Affiliations

  • M. O. Igono
    • 1
  • H. D. Johnson
    • 1
  • B. J. Steevens
    • 1
  • W. A. Hainen
    • 1
  • M. D. Shanklin
    • 2
  1. 1.Department of Dairy ScienceUniversity of Missouri-ColumbiaColumbiaUSA
  2. 2.Department of Agricultural EngineeringUniversity of Missouri-ColumbiaColumbiaUSA

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