Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-26T17:51:53.346Z Has data issue: false hasContentIssue false
  • English
  • Français

Voluntary intake of low-protien diets by ruminants: I. Intake of food by cattle

Published online by Cambridge University Press:  27 March 2009

R. C Elliott
R. C Elliott
Affiliation:
Henderson Research Station, Salisbury, Rhodesia
Get access Rights & Permissions [Opens in a new window]

Extract

1. A study was made of the voluntary intake hay, of low nutritive value, by heifers of two breeds of African cattle when given four different amounts concentrate foods (9, 18, 27 and 36 g/kg W0.73/day) each providing three levels of protein (1·3, 2·6 and 3·9 g DCP kg W0.73/day). The trial was designed two incomplete Latin squares, one for each breed, with thirteen treatments, thirteen heifers and four replicates.

2. Voluntary intakes of low-protein hay by Africander and Mashona heifers were similar and these increased as levels of supplementary protein were raised and intakes of hay were reduced amounts of concentrate provided to them became more liberal. Inter-relationships of food intake and dietary composition were, however, very complex.

3. Increased allowances of dietary protein and concentrate generally corresponded with higher intakes of total food and digestible energy. But this was not true at the lower levels of protein input where there was evidence that food and digestible nutritient intakes were depressed when liberal amounts of concentrate were fed to the cattle.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 69 , Issue 3 , December 1967 , pp. 375 - 382
Copyright
Copyright © Cambridge University Press 1967

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

Blaxter, K. L., Wainman, F. W. & Wilson, R. S. (1961). The regulation of food intake by sheep. Anim. Prod. 3, 51.Google Scholar
Blaxter, K. L. & Wilson, R. S. (1962). Voluntary intake of roughages by steers. Anim. Prod. 4, 351.Google Scholar
Blaxter, K. L. (1962). The Energy Metabolism of Ruminants. London: Hutchinson.Google Scholar
Blaxter, K. L. & Wilson, R. S. (1963). The evaluation of crop husbandry technique in terms of animal production. Anim. Prod. 5, 27.Google Scholar
Blaxter, K. L., Wainman, F. W. & Davidson, J. L. (1966). The voluntary intake of food by sheep and cattle in relation to their energy requirements for maintenance. Anim. Prod. 8, 75.Google Scholar
Campling, R. C, Freer, M. & Balch, C. C. (1962). Factors affecting voluntary intake of food by cows. 2. Br. J. Nutr. 15, 531.CrossRefGoogle Scholar
Campling, R. C, Freer, M. & Balch, C. C. (1962). Factors affecting voluntary intake of food by cows. 3. Br. J. Nutr. 16, 155.Google Scholar
Cochran, W. G. & Cox, G. M. (1957). Experimental Designs. New York: Wiley Publications.Google Scholar
Crampton, E. W. (1957). Interrelationships between digestible nutrient and energy content, voluntary dry matter intake and overall feeding value of forages. J. Anim. Sci. 16, 546.CrossRefGoogle Scholar
Egan, A. R. & Moir, R. J. (1965). Nutritional status and intake regulation in sheep. 1. Aust. J. agric. Res. 16, 437.CrossRefGoogle Scholar
Egan, A. R. (1965). Nutritional status and intake regulation in sheep. II. Aust. J. agric. Res. 16, 451.CrossRefGoogle Scholar
Elliott, R. C. & Topps, J. H. (1963 a). Studies of protein requirements of ruminants. 1. Br. J. Nutr. 17, 539.CrossRefGoogle Scholar
Elliott, R. C. & Topps, J. H. (1963 b). Studies of protein requirements of ruminants. 2. Br. J. Nutr. 17, 549.CrossRefGoogle Scholar
Elliott, R. C. & Topps, J. H. (1963c). Voluntary intake of low protein diets by sheep. Anim. Prod. 5, 269.Google Scholar
Elliott, R. C. & Topps, J. H. (1964). Studies of protein requirements of ruminants. 3. Br. J. Nutr. 18, 245.CrossRefGoogle Scholar
Elliott, R. C., Reed, W. D. C. & Topps, J. H. (1964). Studies of protein requirements of ruminants. 4. Br. J. Nutr. 18, 519.CrossRefGoogle Scholar
Elliott, R. C. (1967). Voluntary intake of low-protein diets by ruminants. 2. J. agric. Sci., Camb. 69, 119.Google Scholar
Hemsley, J. A. & Moir, R. J. (1963). The influence of higher volatile fatty acids on the intake of ureasupplemented low quality cereal hay by sheep. Aust. J. agric. Res. 14, 509.CrossRefGoogle Scholar
Holder, J. M. (1963). Chemostatic regulation of appetite in sheep. Nature, Lond. 200, 1974.CrossRefGoogle Scholar
Hotelling, H. (1931). The generalization of Student's ratios. Ann. Math. Statist. 2, 360.CrossRefGoogle Scholar
Pleterse, P. J. S., Lesch, S. F., Costhuizen, F. J. & Le, Roux D. P. (1966). The effect of various supplementary levels of urea and maize on nitrogen utilization by sheep fed poor quality roughage. S. Afr. J. agric. Sci. 9, 87.Google Scholar
Robinson, J. J. & Forbes, T. J. (1966). A study of the protein requirements of the mature breeding ewe. Br. J. Nutr. 20, 263.CrossRefGoogle Scholar
Ulyatt, M. J. (1965). Effects of intra-ruminal infusions of volatile fatty acids on food intake of sheep. N.Z. J. agric. Res. 8, 387.CrossRefGoogle Scholar