Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-03T05:24:38.016Z Has data issue: false hasContentIssue false

Finishing steers on sorghum grain and sorghum silage. Effects of grain-to-roughage ratio, urea supplementation and hexoestrol implantation on rate of body-weight gain, feed efficiency and carcass compositions

Published online by Cambridge University Press:  27 March 2009

J. G. Morris
Affiliation:
Animal Research Institute, Yeerongpilly, Brisbane

Extract

1. A study of the suitability of rations of predominately sorghum grain for the intensive finishing of steers is reported. Six groups, each of ten steers, 18 months old and of an average body-weight of 544 lb., were fed, according to a set schedule, increasing quantities of grain in the ration until two groups were each consuming rations containing 80, 90 or 100% grain. One of the two groups, fed each grain-to-roughage ratio, received 60 g. urea per head daily. Individual steers were slaughtered when they attained 900 lb. body-weight. A seventh group of ten comparable steers was slaughtered at the commencement of feeding in order to measure changes in body composition due to the nutritional treatments.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1966

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.)

References

REFERENCES

, A.O.A.C. (1960). Official Methods of Analysis, 9th ed.Washington: Association of Official Agricultural Chemists.Google Scholar
Balch, D. A. & Rowland, S. J. (1957). Volatile fatty acids and lactic acid in the rumen of dairy cows receiving a variety of diets. Br. J. Nutr. 11, 288–98.CrossRefGoogle ScholarPubMed
Beeson, W. M. (1962). Recent developments in ruminant nutrition. Proc. Tenth Annual Res. Gonf. pp.3141. Terre Haute, Indiana: Chas. Pfizer & Co. Inc.Google Scholar
Blaxter, K. L. & Wainman, F. W. (1964). The utilization of the energy of different rations by sheep and cattle for maintenance and for fattening. J. agric. Sci., Camb. 63, 113–28.CrossRefGoogle Scholar
Callow, E. H. & Finney, D. J. (1959). Some effects of implanted hexoestrol on tho growth of steers. J. agric. Sci., Camb. 53, 404–9.CrossRefGoogle Scholar
Kraybill, H. F., Bitter, H. L. & Hatukins, O. G. (1952). Body composition of cattle. II. Determination of fat and water content from measurement of body specific gravity. J. appl. Physiol. 4, 575–83.CrossRefGoogle ScholarPubMed
Morris, J. G. (1958). Drought feeding studies with cattle and sheep. 3. A preliminary note on the use of grain sorghum as a drought fodder for cattlo. Qd J. agric. Sci. 15, 195202.Google Scholar
Morris, J. G. & Levitt, M. S. (1964). Effect of urea on digestibility by steers of dietary components, particularly starch. Avst. J. Sci. 27, 116–17.Google Scholar
Morris, J. G. & Moir, K. W. (1963). Methods of determining the chemical composition of dead animals. Symposium: Carcass Composition and Appraisal of Meat Animals, paper 2. Melbourne: C.S.I.R.O.Google Scholar
Morris, J. G. & O'Bryan, M. S. (1965). Finishing cattle on sorghum grain and sorghum silage. Effect of hormone implantation and urea. J. agric. Sci., Camb. 64, 343–50.CrossRefGoogle Scholar
National Research Council (1959). Nutrient Requirements of Beef Cattle. Washington: National Academy of Sciences, National Research Council.Google Scholar
Preston, T. R. (1963). Barley beef production. Vet. Recl. 75, 1399–402.Google Scholar
Reid, J. T., Wellington, G. H. & Dunn, H. O. (1955). Some relationships among the major chemical components of the bovine body and their application to nutritional investigations. J. Dairy Sci. 38, 1344–59.Google Scholar
Ryley, J. W. & Gartner, R. J. W. (1962). Drought feeding studies with cattle. No. 7. The use of sorghum grain as a drought fodder for cattle in late pregnancy and early lactation. Qd J. agric. Sci. 19, 309–30.Google Scholar
Ryley, J. W., Gartner, R. J. W. & Morris, J. G. (1960). Drought feeding studies with cattle. No. 5. The use of sorghum grain as a drought fodder for non-pregnant heifers. Qd J. agric. Sci. 17, 339–59.Google Scholar
Snapp, R. R. & Neumann, A. L. (1960). Beef cattle, 5th ed. p. 296. London: John Wiloy and Sons Inc.Google Scholar
Watson, S. J. & Ferguson, W. S. (1937). The chemical composition of grass silage. J. agric. Sci., Camb. 27, 142.CrossRefGoogle Scholar