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A note on the performance of fattening steers implanted with zeranol under grazing and feedlot conditions in Botswana

Published online by Cambridge University Press:  02 September 2010

C. Shorrock ,
B. S. Capper ,
D. Light  and
M. M. J. Mlambo
C. Shorrock
Affiliation:
Animal Production Research Unit, Private Bag 0033, Gaborone, Botswana
B. S. Capper
Affiliation:
Animal Production Research Unit, Private Bag 0033, Gaborone, Botswana
D. Light
Affiliation:
Animal Production Research Unit, Private Bag 0033, Gaborone, Botswana
M. M. J. Mlambo
Affiliation:
Animal Production Research Unit, Private Bag 0033, Gaborone, Botswana
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Abstract

Trials involving a total of 401 steers were carried out from 1974 to 1976 to determine the effect of implantation with zeranol on the performance of fattening steers under grazing and feedlot conditions i n Botswana.

Over a 180-day grazing period in 1974, 1975 and 1976 there was a significant improvement in live-weight gain of 11·9, 24·5 and 12·3% i n implanted steers over control steers. Under feedlot conditions there was a mean improvement in live-weight gain of implanted steers over control steers of 17·9% over an average stay in the feedlot of 95 days.

Type
Research Article
Information
Animal Production , Volume 26 , Issue 2 , April 1978 , pp. 221 - 224
Copyright
Copyright © British Society of Animal Science 1978

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References

REFERENCES

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