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Analysis of some factors which affect the productivity of beef cows and of their calves in a marginal rainfall area of Rhodesia. 4. The growth and efficiency of live-weight gain of weaned and sucking calves at different ages

Published online by Cambridge University Press:  02 September 2010

F. D. Richardson
F. D. Richardson
Affiliation:
Mlezu Rural Technical Institute, PO Box 311, Que Que, Rhodesia
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Abstract

The growth and efficiency of live-weight gain of 36 calves confined in pens was studied between 30 and 210 days of age. They were weaned individually at 30, 90 or 150 days old and offered one of three solid foods which contained 200, 300 or 400 g milled roughage/kg both before and after weaning. From 30 to 90 days and from 90 to 150 days weaned calves consumed more (P<0·001) solid food than sucking calves. During both these periods sucking calves consumed more (P< 0·001 and P<0·05 during the first and second periods respectively) metabolizable energy (ME), gained more (P<0·01) body weight and also gained more body weight/MJ ME consumed than weaned calves. Composition of solid food had little effect on calf performance.

The combined efficiency (kg calf weight gain/MJ ME consumed by cow and calf unit) was higher (P<0·001) for suckling cows and calves than for weaned cows and calves between 30 and 90 days. Between 90 and 150 days, weaning had no effect on combined efficiency.

Eight similar calves which were reared by their dams on veld until 210 days of age were heavier at 90 (P< 0·001) and 150 (P<0·05) days than penned calves which had been given concentrates ad libitum since weaning at 30 days. The body weights of these two groups were similar at 210 days.

Type
Research Article
Information
Animal Production , Volume 28 , Issue 2 , April 1979 , pp. 213 - 222
Copyright
Copyright © British Society of Animal Science 1979

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References

REFERENCES

Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. Agricultural Research Council, London.Google Scholar
Allden, W. G. 1968. Undernutrition of the Merino sheep and its sequelae. III. The effect on lifetime productivity of growth restrictions imposed at two stages of early post-natal life in a Mediterranean environment. Austr. J. agric. Res. 19: 981–996.CrossRefGoogle Scholar
Blaxter, K. L. 1952. The nutrition of the young Ayrshire calf. 6. The utilization of the energy of whole milk. Br. J. Nutr. 6: 12–19.CrossRefGoogle Scholar
Blaxter, K. L. 1969. The efficiency of energy transformations in ruminents. In Energy Metabolism of Farm Animals (ed. Blaxter, K. L., Kielanowski, J. and Thorbek, G.), pp. 21–28. Oriel Press, Newcastle.Google Scholar
British Standards Institution. 1951. Methods for chemical analysis of liquid milk. BS 1741. British Standards Institution, London.Google Scholar
British Standards Institution. 1955. Gerber method for the determination of fat in milk and milk products. BS 696 revised. British Standards Institution, London.Google Scholar
Devendra, C. and Lewis, D. 1973. The interaction between dietary lipids and fibre in the sheep. 1. A comparison of the methods used for crude fibre and acid-detergent fibre estimations. Anim. Prod. 17: 275–280.Google Scholar
Groenewald, I. B., Elliott, R. C. and Johnson, P. T. C. 1975. Nitrogen intake and utilization by dairy calves. 4. Growth and food intake of calves offered dry diets containing different amounts of nitrogen. Rhod. J. agric. Res. 13: 103–112.Google Scholar
Hammes, R. C, Blaser, R. E., Fontenot, J. P., Bryant, H. T. and Engel, R. W. 1968. Relative value of different forages and supplements for nursing and early weaned beef calves. J. Anim. Sci. 27: 509–515.CrossRefGoogle Scholar
Harwin, G. O. and Lombard, J. H. 1974. Intensification of the beef cow herd. S. Afr. J. Anim. Sci. 4: 247–256.Google Scholar
Johnson, P. T. C. and Elliott, R. C. 1969. Growth and food intake of Friesland calves weaned at different ages and offered dry food containing different proportions of roughage. Rhod. J. agric. Res. 7: 43–50.Google Scholar
Johnson, P. T. C. and Elliott, R. C. 1970. Growth and food intake of Friesland calves given milk once or twice daily and weaned at different ages. Rhod. J. agric. Res. 8: 41–46.Google Scholar
Johnson, P. T. C. and Elliott, R. C. 1972. Dietary energy intake and utilization by young Friesland calves. 3. The utilization by calves of energy of whole milk. Rhod. J. agric. Res. 10: 135–142.Google Scholar
Johnson, P. T. C. and Elliott, R. C. 1973. Dietary energy intake and utilization by young Friesland calves. 6. Energy retention by calves offered dry food containing different proportions of low or high quality roughage. Rhod. J. agric. Res. 11: 19–33.Google Scholar
Ministry of Agriculture, Fisheries and Food. 1975. Energy Allowances and Feeding Systems for Ruminants. Tech. Bull. No. 33. Her Majesty's Stationery Office, London.Google Scholar
Richardson, F. D., Oliver, J. and Clarke, G. P. Y. 1975. Analysis of some factors which affect the productivity of beef cows and of their calves in a marginal rainfall area of Rhodesia. 1. Factors affecting calving rate. Anim. Prod. 21: 41–49.Google Scholar
Richardson, F. D., Oliver, J. and Clarke, G. P. Y. 1979. Analysis of some factors which affect the productivity of beef cows and of their calves in a marginal rainfall area of Rhodesia. 3. Factors affecting calf birth weight, growth to 240 days and use of concentrates by cows and their calves. Anim. Prod. 28: 199–211.CrossRefGoogle Scholar
Spedding, C. R. W. 1971. Grassland Ecology, pp. 160 and 162. Oxford University Press, Oxford.Google Scholar
Tiffin, J. De W. 1973. Weaning studies in range cattle. Stock and Crops 4: 12–15.Google Scholar
Tyrrell, H. F. and Reid, J. T. 1965. Prediction of the energy value of cow's milk. J. Dairy Sci. 48: 1215–1223.CrossRefGoogle ScholarPubMed
Walsingham, J. M., Large, R. V. and Newton, J. E. 1975. The effect of time of weaning on the biological efficiency of meat production in sheep. Anim. Prod. 20: 233–241.Google Scholar