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A note on lactation curves of crossbred cows

Published online by Cambridge University Press:  02 September 2010

T. G. Jenkins  and
C. L. Ferrell
T. G. Jenkins
Affiliation:
Roman L. Hruska US Meat Animal Research Center US Department of Agriculture, Clay Center, Nebraska 68933, USA
C. L. Ferrell
Affiliation:
Roman L. Hruska US Meat Animal Research Center US Department of Agriculture, Clay Center, Nebraska 68933, USA
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Abstract

Milk production data were collected on 8- and 9-year-old Angus × Hereford or Hereford × Angus; Charolais × Angus or Hereford; Jersey × Angus or Hereford; and Simmental × Angus or Hereford cows at days 14, 28, 56, 84, 112, 140, 168 and 196 after parturition. During the study, cows were given diets differing in quantity of brome grass (Bromus inermis) haylage. Lactation curves were estimated by the empirical equation Y(n) = n/aekn. Differences were observed among the breed crosses in 25-week lactation yield and time of peak lactation.

Type
Research Article
Information
Animal Production , Volume 39 , Issue 3 , December 1984 , pp. 479 - 482
Copyright
Copyright © British Society of Animal Science 1984

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References

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