J. Anim Sci.
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J. Anim Sci. 1966. 25:1045-1047.
© 1966 American Society of Animal Science
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Use of Oxytocin for Estimating Milk Production of Beef Cows1

F. J. Schwulst, L. J. Sumption2, L. A. Swiger3 and V. H. Arthaud

University of Nebraska, Lincoln4

Abstract

This experiment evaluated the use of oxytocin for estimating milk production of beef cattle. Twenty-four Angus cows, divided into two groups of 12 each, were assigned to three treatments using a switchback design. Treatments were (A) control, (B) oxytocin administered after nursing prior to machine milking, and (C) oxytocin administered before nursing. Oxytocin treatment did not have a significant effect on milk consumption or on total milk production. Differences in means of milk consumption and total milk production suggest that, when oxytocin was injected prior to nursing, more milk was obtained than was available to the calf under treatments A and B. These differences were not significant.

Correlations of milk consumption and growth traits were computed. The correlations of individual milk consumption observations and growth traits were positive and similar to those reported in the literature.

Footnotes

1 Published with the approval of the Director as Paper No. 1848, Journal Series, Nebraska Agricultural Experiment Station. Contribution from North Central Regional Project NC-1, Improvement of Beef Cattle through Breeding Methods.

2 Present address: Federal Research Station, Lethbridge, Alberta. Canada.

3 Present address: Department of Animal Science, Ohio State University, Columbus, Ohio.

4 The assistance of Melvin Riley with chemical analyses is gratefully acknowledged.






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Copyright © 1966 by the American Society of Animal Science.