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The effects of dietary energy content and level of feeding on the growth of Israeli-Friesian intact male cattle

  • D. Levy (a1), Z. Holzer (a1), H. Neumark (a1) and S. Amir (a1)

Summary

In an experiment with group-fed cattle from 6 months of age to slaughter at 480 kg live weight two levels of feed intake: 1, ad libitum, 2, 85% of ad libitum amount, were combined with two ratios of concentrate to hay: a, 70: 30; b, 30: 70. In two further treatments, 3a and 3b, the cattle were fed diets a or b at 70% of ad libitum from 6 to 10 months and ad libitum thereafter.

Daily gain during the first 124 days of the experiment was (in grams) 1293, 983, 1097, 846, 992 and 756, and from the 125th day to slaughter 735, 600, 796, 579, 830 and 714, for treatments la, lb, 2a, 2b, 3a and 3b, respectively. The decline in rate of gain from the first period to the second was inversely related to the level of feed intake and to the percentage of concentrates in the ration in the first period.

Daily carcass gain was 582, 393, 532, 350, 531 and 368 g for treatments la, lb, 2a, 2b, 3a and 3b, respectively.

The treatments that were switched over from 70% of ad libitum feed intake in the first period to 100% in the second (3a and 3b), exhibited considerable compensatory growth in the second period, but this was not sufficient to be of economic advantage.

The overall ME requirement per kg of live-weight gain was inversely related to rate of gain. Of the six treatments, 2a (85% of ad libitum, 70% concentrate) was the most efficient (19·8 Mcal/kg live-weight gain).

Animals on the 100% level of feed intake throughout the experiment (treatments la, lb) were significantly fatter than those on the other treatments.

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References

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Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. Agricultural Research Council, London.
Buysse, F. 1969. Intensive Beef Production. Publ. Animal Nutrition Station, Gontrode, Belgium.
Cottyn, G. C. and Boucque, C. V. 1968. Rapid method for the gas-chromatographic determination of volatile fatty acids in rumen fluid. J. agric. Fd Chem. 16: 105107.
Drori, D., Levy, D., Folman, Y. and Holzer, Z. 1973. Compensatory growth of intensively raised bull calves. J. Anim. Sci. (in press).
Holzer, Z. and Levy, D. 1969. The estimation of empty-body weight of Israeli-Friesian and Hereford × Arab crossbred bull calves. IsraelJ. agric. Res. 19: 195198.
Levy, D. and Holzer, Z. 1971. The value of concentrates and roughage for fattening cattle. Anim. Prod. 13: 569579.
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 com- position of Israeli-Friesian bull calves.] Pamph. Nat. Univ. Inst. Agric, Rehovot, No. 84.
Levy, D., Holzer, Z. and Volcani, R. 1968. 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.
Levy, D., Holzer, Z. and Volcani, R. 1970. Concrete slatted floors vs. bedding for fattening Israeli-Friesian bull calves. J. Anim. Sci. 31: 815820.
Preston, T. R., Aitken, J. N., Whitelaw, F. G., MacDearmid, A., Philip, E. B. and MacLeod, N. A. 1963. Intensive beef production. 3. Performance of Friesian steers given low-fibre diets. Anim. Prod. 5: 245249.
Preston, T. R. and Willis, M. B. 1970. Intensive Beef Production, pp. 306310, 417–418. Pergamon Press, Oxford.
Rittmansperger, F. 1969. [Results of performance and progeny testing for meat production of cattle.] Züchtungskunde 41: 165168.

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