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Effect of castration and dietary protein level on growth and carcass composition in beef cattle

Published online by Cambridge University Press:  27 March 2009

I. S. Robertson ,
H. Paver  and
J. C. Wilson
I. S. Robertson
Affiliation:
Department of Animal Health Department of Veterinary SurgeryUniversity of Edinburgh, Veterinary Field Station Easter Bush, Roslin, Midlothian, Scotland
H. Paver
Affiliation:
Department of Animal Health Department of Veterinary SurgeryUniversity of Edinburgh, Veterinary Field Station Easter Bush, Roslin, Midlothian, Scotland
J. C. Wilson
Affiliation:
Department of Veterinary Surgery,University of Edinburgh, Veterinary Field StationEaster Bush, Roslin, Midlothian, Scotland
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Summary

Thirty-six Hereford cross Friesian calves weighing on average 82.4 kg at an average age of 90 days were allotted in randomized blocks to a 2 x 3 factorial design. Castration by the open method was performed on half the number of calves and three dietary crude protein levels, 20, 14 and 11 % in dry matter were used in a mainly cereal concentrate diet fed ad libitum individually to the animals in stalls. Slaughter was at a fixed weight of approximately 420 kg.

Steers compared with bulls gained weight at a significantly slower rate and with less efficiency. Castration's greatest effect in reducing rate of gain occurred during the later stages of rearing when puberty in the bulls, as measured by a steep rise in seminal fructose, was associated with their relatively well maintained live-weight gain. The influence of testicular hormones was also apparent in the bull's carcass with its heavier head, horn and hide and significantly higher proportion of lean and lower proportion of fat in the side.

Dietary protein level affected rate of gain in both bulls and steers but at each level bulls performed better than steers. With circumstances similar to those in this experiment, a 14 % crude protein level in concentrate dry matter appears adequate for both categories up to a live weight of circa 270 kg and a reduction to 11 % thereafter. The effect of protein level on tissue proportions of the side and carcass composition generally was minimal.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 74 , Issue 2 , April 1970 , pp. 299 - 310
Copyright
Copyright © Cambridge University Press 1970

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References

REFERENCES

Agricultural Research Council (1965 a). Recommended Procedures for use in the Measurement of Beef Cattle and Carcases. London: H.M.S.O.Google Scholar
Agricultural Research Council (1965 b). The Nutrient Requirements of Farm Livestock No. 2 Ruminants. London: H.M.S.O.Google Scholar
Allison, J. B. & Bird, J. W. C. (1964). Mammalian Protein Metabolism, Chptr. 11. Ed. Munro, H. N. & Allison, J. B.New York: Academic Press.Google Scholar
Bailey, C. M., Probert, C. L. & Bohman, V. R. (1966). Growth rate, feed utilisation and body composition of young bulls and steers. J. Anim. Sci. 25, 132–7.CrossRefGoogle ScholarPubMed
Bowers, H. B., Preston, T. R., McDonald, I., MacLeod, N. A. & Philip, E. B. (1965). The effect of nitrogen retention on all concentrate diets containing different levels of fish meal. Anim. Prod. 7, 19–25.Google Scholar
Brannang, E. (1966). Studies on monozygous cattle twins. XVIII. The effect of castration and age of castration on the growth rate, feed conversion and carcase traits of Swedish Red and White cattle. Lantbr-Högsk Annlr 32, 329–415.Google Scholar
Cobic, T. (1968). Castration experiments with Yugoslav Simmental cattle. I. The effect of castration on growth and liveweight gains. Anim. Prod. 10, 103–8.CrossRefGoogle Scholar
Harte, F. J., Curran, S. & Vial, V. E. (1965). The production of beef from young bulls. Ir. J. agric. Res. 4, 189–204.Google Scholar
Hedrick, H. B. (1968). Bovine growth and composition. Res. Bull. no. 928. Mo. agric. Exp. Stn.Google Scholar
Jones, K. B. (1969). Objective measurements on the texture of meat from bulls and steers, and the influence of heat treatments. In Meat Production from Entire Male Animals. Ed. Rhodes, D. N.. London: Churchill.Google Scholar
Kay, M., Bowers, H. B. & Mckiddie, G. (1968). The protein requirements of rapidly growing steers. Anim. Prod. 10, 37–42.Google Scholar
Mason, I. L. (1951). Performance recording in beef cattle. Anim. Breed. Abstr. 19, 1–24.Google Scholar
Prescott, J. H. D. & Lamming, G. E. (1964). The effects of castration on meat production in cattle, sheep and pigs. J. agric. Sci., Camb. 63, 341–57.Google Scholar
Robertson, I. S. (1966). Castration in farm animals. Its advantages and disadvantages. Vet. Rec. 78, 130–35.Google Scholar
Robertson, I. S., Wilson, J. C. & Morris, P. G. D. (1967). Growth, carcase composition and sexual development in bulls, steers and cattle castrated by Baiburtcjan's method. Vet. Rec. 81, 88–103.CrossRefGoogle ScholarPubMed
Turton, J. D. (1962). The effect of castration on meat production and quality in cattle, sheep and pigs. Anim. Breed. Abstr. 30, 447–56.Google Scholar
Wickens, R. & Ball, C. (1967). Comparison of yard-fed bulls and steers for beef production. In Experimental Husbandry, No. 15 London: H.M.S.O.Google Scholar