Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-28T10:24:12.009Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Abadia, D. and Brinks, J. S. 1972. Milk production of Hereford heifers. J. Anim. Sci. 34: 886 (Abstr.).Google Scholar
Chenette, C. G. and Frahm, R. R. 1981. Yield and composition of milk from various two-breed cross cows. J. Anim. Sci. 52: 483–492.CrossRefGoogle Scholar
Cobby, J. M. and Le Du, Y. L. P. 1978. On fitting curves to lactation data. Anim. Prod. 26: 127–133.Google Scholar
Gaskins, C. T. and Anderson, D. C. 1980. Comparison of lactation curves in Angus-Hereford, Jersey-Angus and Simmental-Angus cows. J. Anim. Sci. 50: 828–832.CrossRefGoogle Scholar
Gleddie, V. M. and Berg, R. T. 1968. Milk production in range beef cows and its relationship to calf gains. Can. J. Anim. Sci. 48: 323–333.CrossRefGoogle Scholar
Jenkins, T. G. and Ferrell, C. L. 1982. Lactation curves of mature crossbred cows: Comparison of four estimating functions. J. Anim. Sci. 54: Suppl., p. 189 (Abstr.).Google Scholar
Jenkins, T. G. and Ferrell, C. L. 1983. Nutrient requirements to maintain weight of mature, nonlactating, nonpregnant cows of four diverse breed types. J. Anim. Sci. 56: 761–770.CrossRefGoogle ScholarPubMed
Kress, D. D. and Anderson, D. C. 1974. Milk production in Hereford cattle. J. Anim. Sci. 38: 1320 (Abstr.).Google Scholar
Notter, D. R., Cundiff, L. V., Smith, G. M., Laster, D. B. and Gregory, K. E. 1978. Characterization of biological types of cattle. VII. Milk production in young cows and transmitted and maternal effects on preweaning growth of progeny. J. Anim. Sci. 46: 908–921.CrossRefGoogle Scholar
Rowlands, G. J., Lucey, S. and Russell, A. M. 1982. A comparison of different models of the lactation curve in dairy cattle. Anim. Prod. 35: 135–144.Google Scholar
Totusek, R., Arnett, D. W., Holland, G. L. and Whiteman, J. V. 1973. Relation of estimation method, sampling interval and milk composition to milk yield of beef cows and calf gain. J. Anim. Sci. 37: 153–158.CrossRefGoogle Scholar
Williams, J. H., Anderson, D. C. and Kress, D. D. 1977. Nursing behaviour of young Hereford calves. J. Anim. Sci. 45: Suppl. 1, p. 337 (Abstr.).Google Scholar
Wood, P. D. P. 1967. Algebraic model of the lactation curve in cattle. Nature, Lond. 216: 164–165.CrossRefGoogle Scholar