Hostname: page-component-54dcc4c588-r5qjk Total loading time: 0 Render date: 2025-10-06T22:15:12.109Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on the estimation of total lactation yield from production on a single day

Published online by Cambridge University Press:  02 September 2010

P. D. P. Wood
P. D. P. Wood
Affiliation:
Milk Marketing Board, Thames Ditton, Surrey
Get access

Summary

The recording of total lactation yield for individual cows can be timeconsuming and costly. Periodic sampling at intervals throughout lactation offers an acceptable alternative, and a single day's production can be made to furnish a useful guide, by using an equation relating total to daily production.

Errors of estimation are affected by the degree of consistency of daily production, parity and individual herd management, so that estimates could be biased and have a standard error of nearly 20% if these effects are disregarded. Coefficients in the prediction equation must therefore be developed for individual herds.

Information

Type
Research Article
Information
Animal Production , Volume 19 , Issue 3 , December 1974 , pp. 393 - 396
Copyright
Copyright © British Society of Animal Science 1974

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.)

Article purchase

Temporarily unavailable

References

REFERENCES

O'Connor, L. K. and Lipton, S. 1960. The effect of various sampling intervals on the estimation of lactation milk yield and composition. J. Dairy Res. 27: 389–398.CrossRefGoogle Scholar
Robertson, K. J., Speight, B. R., Ball, C., Edwards, R. A., Parkinson, A. E. and Waite, R. 1973. Dairy cow production records based on information gathered at afternoon milkings only. Proc. Brit. Soc. Anim. Prod. (New Series) 2: 74 (Abstr.).Google Scholar
Van Vleck, L. D. and Henderson, C. R. 1961. Estimates of genetic parameters of some functions of part lactation milk records. J. Dairy Sci. 44: 1073–1084.CrossRefGoogle Scholar
Wood, P. D. P. 1969. Factors affecting the shape of the lactation curve in cattle. Anim. Prod. 11: 307–316.Google Scholar
Wood, P. D. P. 1970. A note on the repeatability of parameters of the lactation curve in cattle. Anim. Prod. 12: 535–538.Google Scholar