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A comparison of sequential implantation with Zeranol or a single implant with Oestradiol 17β

Published online by Cambridge University Press:  23 November 2017

M. Kay ,
T. L. Reith  and
E. A. Hunter
M. Kay
Affiliation:
North of Scotland College of Agriculture, 581 King Street, Aberdeen AB9 1UD
T. L. Reith
Affiliation:
North of Scotland College of Agriculture, 581 King Street, Aberdeen AB9 1UD
E. A. Hunter
Affiliation:
A.F.R.C. Unit of Statistics Mayfield Road, Edinburgh
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Extract

Implants are widely used with both steers and heifers over the 100 days before slaughter. They are known to increase the growth rate and improve the carcasses of the cattle. Results were presented to this Society last year (Proceeding Winter Meeting 1983 paper 102) which showed that repeat implantation with Zeranol in steers weighing initially 55 or 175 kg produced worthwhile improvements in daily gain. The object of this work was to obtain information on the effect of a single implant of oestradiol 17 β with repeat implantation using Zeranol at 90 day intervals.

Type
Beef Production and Growth Promoters
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1984 , March 1984 , pp. 92
Copyright
Copyright © The British Society of Animal Production 1988

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