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The protein requirement of the ruminant calf. II. Further studies on the effect of protein content of the concentrate mixture on the performance of calves weaned at an early age

Published online by Cambridge University Press:  02 September 2010

I. J. F. Stobo ,
J. H. B. Roy  and
Helen J. Gaston
I. J. F. Stobo
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
J. H. B. Roy
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
Helen J. Gaston
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
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Extract

1. Eighty-four Friesian heifer calves were used in two experiments (Experiments 4 and 5) to study the protein requirement of the ruminant calf to 12 weeks of age. The calves were weaned at 5 weeks of age and given a concentrate containing one of several protein levels, together with hay and water.

2. In Experiment 4, the effect of changing the protein content of the concentrates at 8 weeks of age under ad libitum feeding conditions was studied. A concentrate containing 20·6% crude protein (air-dry basis) tended to promote more rapid weight gains in calves to 8 weeks than a similar concentrate with 12·1% crude protein. Following the change in diet at 8 weeks, both groups of calves given the low-protein diet gained weight at similar rates in the period 8–12 weeks, irrespective of the protein level to 8 weeks. During the period 8–12 weeks calves given the high-protein diet, after receiving a low-protein diet to 8 weeks, tended to gain weight at a faster rate than those given the high-protein concentrate throughout. After adjustment for differences between treatment groups in mean concentrate consumption and mean live-weight at 8 weeks, the live-weight gain from 8 to 12 weeks was significantly greater in calves given the high-protein diet after 8 weeks.

3. In Experiment 5, a significantly lower growth rate was obtained when concentrate intake was restricted to a maximum of 2 kg./day than when given ad libitum. Calves given the concentrates containing 15·9% or 20·6% crude protein gained weight significantly faster than those given the concentrate containing 12·1% crude protein, at both levels of feeding, after live-weight gain was adjusted for differences between treatment groups in mean food consumption and live-weight at 1 week.

4. It is concluded that no advantage is obtained by giving a concentrate containing more than 15·9% protein to Friesian heifer calves weaned at 5 weeks of age. The results indicate clearly the importance of an adequate supply of energy in the diet of the ruminant calf if maximum live-weight gain is to be achieved.

Type
Research Article
Information
Animal Production , Volume 9 , Issue 1 , February 1967 , pp. 23 - 33
Copyright
Copyright © British Society of Animal Science 1967

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References

REFERENCES

Blaxter, K. L., 1962. The Energy Metabolism of Ruminants. Hutchinson, London.Google Scholar
Blaxter, K. L., & Wood, W. A., 1951. The nutrition of the young Ayrshire calf. 4. Some factors affecting the biological value of protein determined by nitrogen-balance methods. Br. J. Nutr., 5: 55–67.CrossRefGoogle Scholar
Brisson, G. J., Cunningham, H. M., & Haskell, S. R., 1957. The protein and energy requirements of young dairy calves. Canad. J. Anim. Sci., 37: 157–167.CrossRefGoogle Scholar
Broster, W. H., Tuck, V. J., & Balch, C. C., 1963. Experiments on the nutrition of the dairy heifer. 4. Protein requirements of 2-year-old heifers. J. agric. Sci., Camb., 60: 393–398.CrossRefGoogle Scholar
Brown, L. D., & Lassiter, C. A., 1962. Protein-energy ratios for dairy calves. J. Dairy Sci., 45: 1353–1356.CrossRefGoogle Scholar
Brown, L. D., Lassiter, C. A., Everett, J. P., Seath, D. M., & Rust, J. W., 1958. Effect of protein level in calf starters on the growth rate and metabolism of young calves. J. Dairy Sci., 41: 1425–1433.CrossRefGoogle Scholar
Lofgreen, G. P., Loosli, J. K., & Maynard, L. A., 1951. Comparative study of conventional protein allowances and theoretical requirements of growing Holstein heifers. J. Anim. Sci., 10: 171–183.CrossRefGoogle ScholarPubMed
Moir, R. J., 1961. A note on the relationship between digestible dry matter and the digestible energy content of ruminant diets. Aust. J. exp. Agric. Anim. Husb., 1: 24–26.CrossRefGoogle Scholar
Preston, T. R., 1963. The nutrition of the early-weaned calf. Wld Rev. Nutr. Diet., 4: 121–139.Google Scholar
Preston, T. R., Whitelaw, F. G., MacLeod, N. A., & Philip, E. B., 1965. The nutrition of the early-weaned calf. 8. The effect on nitrogen retention of diets containing different levels of fish meal. Anim. Prod., 7: 53–58.Google Scholar
Roy, J. H. B., 1959. Calves (dairy and beef). In Scientific Principles of Feeding Farm Livestock. Farmer & Stockbreeder Publications Ltd., London, pp. 48–75.Google Scholar
Roy, J. H. B., Gaston, H. J., Shillam, K. W. G., Thompson, S. Y., Stobo, I. J. F., & Greatorex, J. C., 1964. The nutrition of the veal calf. The effect of anaemia and of iron and chlortetracycline supplementation on the performance of calves given large quantities of whole milk. Br. J. Nutr., 18: 467–502.CrossRefGoogle ScholarPubMed
Stobo, I. J. F., 1964. Studies in the nutrition of young cattle with special reference to rumen development and protein requirements of the early-weaned calf. Ph.D. Thesis, Univ. Reading.Google Scholar
Stobo, I. J. F., Roy, J. H. B., & Gaston, H. J., 1966. Rumen development in the calf. 2. The effect of diets containing different proportions of concentrates to hay on digestive efficiency. Br. J. Nutr., 20: 189–215.CrossRefGoogle ScholarPubMed
Stobo, I. J. F., Roy, J. H. B., & Gaston, H. J., 1967. The protein requirement of the ruminant calf. I. The effect of protein content of the concentrate mixture given to calves weaned at an early age. Anim. Prod., 9: 7–21.Google Scholar