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Intensive beef production. 12. Replacement of concentrates with chopped dried grass

  • M. Kay (a1), R. Massie (a1) and A. MacDearmid (a1)

Summary

1. A growth trial was carried out using 24 British Friesian steers given diets containing (1) 100%, (2) 60%, (3) 40% and (4) 0% concentrates and chopped dried grass up to 100%.

2. Daily dry-matter intake was significantly lower for steers on Treatment 1 than for steers on the other three treatments.

3. Rate of live-weight gain declined from 1·18 to 0·88 kg/day and carcass gain from 625 to 430 g/day between steers on Treatments 1 and 4.

4. Killing-out percentage dropped from 55·3% (1) to 51·9% (4) and the 8th-10th rib from steers on Treatments 3 and 4 contained significantly more crude protein and less ether-extractable matter than ribs from steers on Treatments 1 and 2.

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References

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Blaxter, K. L., Wainman, F. W. and Smith, J. S. 1970. Nutritive value of mixtures of dried grass and barley as determined by indirect calorimetry. Anim. Prod. 12: 369370.
Bowers, H. B., Preston, T. R.McDonald, I. and Philip, Euphemia B. 1965. Intensive beef production. 4. The effect on nitrogen retention of all-concentrate diets containing levels of fish meal. Anim. Prod. 7: 1925.
Davidson, J., Mathieson, J. and Boyne, A. W. 1970. The use of automation in determining nitrogen by the Kjeldahl method, with final calculations by computer. Analyst, Land. 95: 181193.
Denerley, H., Gunn, J., Blaxter, K. L. and Wainman, F. W. 1969. The value of artificially dried grass in terms of animal production. Anim. Prod. 11: 273274. (Abstr.)
Kay, M. 1970. The nutrition of the early weaned calf. Rep. Rowett Inst. 25: 123129.
Kay, M., MacDearmid, A. and MacLeod, N. A. 1970. Intensive beef production. 10. Replacement of cereals with chopped straw. Anim. Prod. 12: 261266.
Kay, M., MacDearmid, A. and Massie, R. 1970, Intensive beef production. 11. Replacement of cereals with ground straw. Anim. Prod. 12: 419424.
Poutiainen, E. K., Lonsdale, C. R. and Tayler, J. C. 1969. The effect of method of processing dried grass, wafered with or without barley grain on the growth of young cattle. Proc. Nutr. Soc. 28: 6162.
Tayler, J. C. 1970. Dried forages and beef production. J. Br. Grassld Soc. 25: 180190.

Intensive beef production. 12. Replacement of concentrates with chopped dried grass

  • M. Kay (a1), R. Massie (a1) and A. MacDearmid (a1)

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