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Effect of concentrate: roughage ratio on the production of beef from Israeli-Friesian bulls slaughtered at different live weights

Published online by Cambridge University Press:  02 September 2010

D. Levy
Affiliation:
Agricultural Research Organization, Newe Ya'ar Regional Experiment Station, Israel
Z. Holzer
Affiliation:
Agricultural Research Organization, Newe Ya'ar Regional Experiment Station, Israel
Y. Folman
Affiliation:
Agricultural Research Organization, Newe Ya'ar Regional Experiment Station, Israel
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Summary

The effects of roughage level (15 and 35% of the ration) and of slaughter weight (400,450 and 500 kg) were studied in an experiment of 2 x 3 factorial design. Daily live-weight gains and carcass gains were significantly higher on the lower roughage levels, but there was no difference in degree of fatness of the carcass. Dry-matter intake expressed as a percentage of body weight was 2·91 on 35% roughage compared with 2·53 and 15% roughage, i.e. 15% higher on the highroughage diet. This compensated the animals on the high-roughage diet for the lower energy content of their feed. Rate of gain increased with an increase in slaughter weight. The percentage of fat trim and of saleable meat increased, while that of bone decreased significantly with an increase in slaughter weight. The animals on the lowroughage diet were approximately 11% more efficient than the others in converting metabolizable energy into live weight.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1975

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References

Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2, Ruminants. Agricultural Research Council, London.Google Scholar
Baile, C. A. 1968. Regulation of feed intake in ruminants. Fed. Proc. 2: 13611366.Google Scholar
Balch, C. C. and Campling, R. C. 1962. Regulation of voluntary food intake in ruminants. Nutr. Abstr. Rev. 32: 669686.Google ScholarPubMed
Blaxter, K. L. 1962. The Energy Metabolism of Ruminants. Hutchinson, London.Google Scholar
Blaxter, K. L., Wainman, F. W. and Wilson, R. S. 1961. The regulation of feed intake in sheep. Anim. Prod. 3: 5161.Google Scholar
Blaxter, K. L. and Wilson, R. S. 1962. The voluntary intake of roughages by steers. Anim. Prod. 4: 351358.Google Scholar
Campling, R. C. 1966. The control of voluntary intake of food in cattle. Outl. Agric. 5: 7479.CrossRefGoogle Scholar
Drori, D., Levy, D., Folman, Y. and Holzer, Z. 1974. Compensatory growth of intensively raised bull calves. II. The effect of feed energy concentration. J. Anim. Sci. 38: 654661.CrossRefGoogle Scholar
Ezion, G. 1972. [Intensive raising of calves slaughtered at 450 kg body weight at the age of 10 months.] Meshek Habakar Vehehalav 121: 3640.Google Scholar
Holzer, Z. and Levy, D. 1969. The estimation of empty body weight of Israeli-Friesian and Herefordx Arab crossbred bull calves. Israel J. agric. Res. 19: 195198.Google Scholar
Holzer, Z. and Levy, D. 1973. Growth, feed conversion, efficiency and meat yield in Israeli-Friesian and grade Hereford bull calves. Israel J. agric. Res. 23 (1): 3139.Google Scholar
Holzer, Z., Levy, D., Tagari, H. and Volcani, R. 1975. Soaking of complete fattening rations high in poor roughage. II. The effect of moisture content and of particle size of the roughage component on the performance of male calves. Anim. Prod, (in press).CrossRefGoogle Scholar
Levy, D. and Holzer, Z. 1971. The relative value of concentrates and roughage for fattening cattle. Anim. Prod. 13: 569579.Google Scholar
Levy, D., Holzer, Z., Neumark, H. and Amir, S. 1974. The effects of dietary energy content and level of feeding on the growth of Israeli-Friesian intact male cattle. Anim. Prod. 18: 6773.Google Scholar
Levy, D., Holzer, Z. and Volcani, R. 1968a. [The effect of age and live weight on feed conversion and meat yield of beef breed bull calves.] Ktavim 18: 117125.Google Scholar
Levy, D., Holzer, Z. and Volcani, R. 1968b. The effect of age and live weight on feed conversion and yield of saleable meat of intact Israeli-Friesian male calves. Anim. Prod. 10: 325330.Google Scholar
Levy, D. and Volcani, R. 1964. [A survey of the trends in beef cattle production and consumption in Israel.] Spec. Bull. Volcani Inst. Agric. Res., Rehovot, Israel 61.Google Scholar
Levy, D. and Volcani, R. 1965. [The effect of different proportions of roughage and concentrates in the fattening ration on the rate of gain, feed conversion and body composition of Israeli-Friesian bull calves.] Pamph. Nat. Univ. Inst. Agric. Rehovot, Israel No. 84.Google Scholar
McCroskey, J., Pope, L. S., Walter, L. and Urban, K. 1958. Fattening steers and heifers on rations containing different levels of concentrates. Misc. Publ. Okla agric. Exp. Stn, MP 51: 116121.Google Scholar
Montgomery, M. J. and Baumgardt, B. R. 1965a. Regulation of food intake in ruminants. 1. Pelleted rations varying in energy concentration. J. Dairy Sci. 48: 569579.CrossRefGoogle ScholarPubMed
Montgomery, M. J. and Baumgardt, B. R. 1965b. Regulation of food intake in ruminants. 2. Rations varying in energy concentration and physical form. J. Dairy Sci. 48: 16231628.CrossRefGoogle Scholar
Pahnish, D. F., Stanley, E. B. and Shtllingburg, C. G. 1952. Effects of roughage levels on fattening cattle in Arizona. Bull. Ariz, agric. Exp. Stn, No. 272.Google Scholar
Preston, T. R. and Willis, M. B. 1970. Intensive Beef Production. Pergamon Press, London.Google Scholar