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An assessment of the biological and economic efficiency in conversion of milk to growth in N'Dama calves

Published online by Cambridge University Press:  02 September 2010

K. Agyemang ,
D. Clifford  and
D. A. Little
K. Agyemang
Affiliation:
International Livestock Centre for Africa International Trypanotolerance Centre (ITC), PMB 14, Banjul, The Gambia
D. Clifford
Affiliation:
International Trypanotolerance Centre (ITC), PMB 14, Banjul, The Gambia
D. A. Little
Affiliation:
International Livestock Centre for Africa International Trypanotolerance Centre (ITC), PMB 14, Banjul, The Gambia
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Abstract

Two groups of eight N'Dama calves were fed different quantities of milk from birth to 10 months of age to compare efficiencies of converting milk to live-weight gain, and to assess the economic efficiencies of the two feeding regimes. Group 1 received an average of 347 (s.e. 2·4) kg per calf, with a daily and seasonal pattern of feeding designed to simulate a village production system where calves have access to only part of the milk produced by their dams, the rest being extracted for human consumption. Group 2 received an average of 617 (s.e. 5·1) kg per calf, and simulated situations where no milk is extracted such as in a ranch or station-type of operation.

During the first 6 months, when growth was certainly mediated only by milk, and live-weight gains were consistently positive at 151 and 262 g/day in groups 1 and 2 respectively, the biological conversion of milk to live weight did not differ between groups (8·7 v. 8·8 kg milk per kg live-weight gain). When the two groups were compared over the same weight range to remove possible effects of variable maintenance requirements, the conversion efficiencies again did not differ significantly. Over the whole 10-month period the biological conversion factors were slightly less favourable but still not different between groups (9·5 v. 9·4 kg/kg). When monetary values of milk and live weight at farmgate prices were applied to quantities of milk consumed and calf live-weight increases, the cost efficiency of group 1 was superior to that of group 2.

Based on these findings and results from other on-farm experiments in The Gambia, it was concluded that the current practice of partial milk extraction as occurs in the village production system is a logical approach for profit maximization.

Keywords

calf productioncost analysisGambiamilk productionN'Dama
Type
Research Article
Information
Animal Production , Volume 56 , Issue 2 , April 1993 , pp. 165 - 170
Copyright
Copyright © British Society of Animal Science 1993

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References

Agyemang, K., Jeannin, P., Grieve, A. S., Bah, M. L. and Dwinger, R. H. 1988. Milk extraction for human consumption from N'Dama cattle under village management conditions in The Gambia. In Livestock production in tsetse affected areas of Africa, pp. 231–245. English Press, Nairobi.Google Scholar
Agyemang, K., Dwinger, R. H., Grieve, A. S. and Bah, M. L. 1991a. Milk production characteristics and productivity of N'Dama cattle kept under village management in The Gambia. Journal of Dairy Science 74: 1599–1608.CrossRefGoogle Scholar
Agyemang, K., Dwinger, R. H., Grieve, A. S. and Little, D. A. 1991b. Studies on the effects of milking on calf growth and viability and on cow reproductive performance in traditionally managed N'Dama herds. Animal Production 53: 11–18.Google Scholar
Agyemang, K., Dwinger, R. H. and Little, D. A. 1992. A detailed analysis of biological and socio-economic aspects of the productivity of village-based N'Dama cattle subjected to varying degrees of tsetse challenge in The Gambia and Senegal. International Livestock Centre for Africa/International Centre for Research on Animal Diseases, pp. 196.Google Scholar
Agricultural Research Council. 1980. The nutrient requirements of ruminant livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Drewry, K. J., Brown, C. J. and Honea, R. S. 1959. Relationships among factors associated with mothering ability in beef cattle. Journal of Animal Science 18: 938–946.CrossRefGoogle Scholar
Kerven, C. 1987. Some research and development implications for pastoral dairy production in Africa. International Livestock Centre for Africa, bulletin no. 26, pp. 29–35.Google Scholar
International Livestock Centre for Africa. 1988. Annual report 1988, pp. 1–6. ILCA, Addis Ababa.Google Scholar
Leeuw, P. N. de, Bekure, S. and Grandin, B. 1984. Aspects of livestock productivity on Maasai group ranches in Kenya. International Livestock Centre for Africa, bulletin no. 19, pp. 17–21.Google Scholar
Little, D. A., Riley, J. A., Agyemang, K., Jeannin, P., Grieve, A. S., Badji, B. and Dwinger, R. H. 1991. Effect of groundnut cake supplementation during the dry season on productivity characteristics of N'Dama cows under village husbandry conditions in The Gambia. Tropical Agriculture, Trinidad 68: 259–262.Google Scholar
Montsma, G. 1960. Observations of milk yield, and calf growth and conversion rate, on three types of cattle in Ghana. Tropical Agriculture, Trinidad 37: 293–302.Google Scholar
Monstma, G. 1962. Observations of milk yield, and calf growth and conversion rate, on three types of cattle in Ghana. II. Effects of plane nutrition. Tropical Agriculture, Trinidad 39:123–129.Google Scholar
Starkey, P. H. 1984. N'Dama cattle — a productive trypantolerant breed. World Animal Review 50: 2–15.Google Scholar
Trail, J. C. M. and Gregory, K. E. 1982. Production characters of the Sahiwal and Ayrshire breeds and their crosses in Kenya. Tropical Animal Health and Production 14: 45–57.CrossRefGoogle ScholarPubMed
Wagenaar, K. T., Diallo, A. and Sayers, A. R. 1986. Productivity of transhumant Fulani cattle in the Inner Niger Delta of Mali. International Livestock Centre for Africa, research report no. 13.Google Scholar