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The energy value to sheep of saturated and unsaturated fat fed singly or in combination

Published online by Cambridge University Press:  02 September 2010

F. W. Wainman  and
P. J. S. Dewey
F. W. Wainman
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
P. J. S. Dewey
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Abstract

Four diets containing either 0 or 50 g fat per kg were prepared from a basal mix of barley, sugar-beet pulp, soya-bean meal and molasses. The fats used were tallow (saturated), soya-acid oil (unsaturated), or a 45:5 mixture of both fats. The diets were given with chopped dried grass to adult wether sheep in the ratio 4:1 of diet to dried grass. Measurements of heat production of the sheep were made in closed-circuit respiration chambers and from the data the efficiencies of utilization of energy for maintenance (km) and production (kf) were calculated for each diet, together with the metabolizable energy (ME) values for the fats.

Values for both km and kf were not significantly different between diets, the means were 0·81 and 0·61 respectively. The ME values (MJ/kg DM) of the fats were for tallow 36·2, for soya-acid oil 36·6 and for the tallow/soya mixture 31·6; these values were not significantly different.

No evidence of any synergistic effect caused by the addition of an unsaturated fat to a saturated fat was seen in this experiment.

Type
Research Article
Information
Animal Production , Volume 44 , Issue 2 , April 1987 , pp. 227 - 232
Copyright
Copyright © British Society of Animal Science 1987

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References

REFERENCES

Bull, L. S. 1971. Fats in ruminant rations. Proceedings of the Maryland Nutrition Conference, pp. 20–25.Google Scholar
Christie, W. W. 1981. The effect of diet and other factors on the lipid composition of ruminant tissues and milk. In Lipid Metabolism in Ruminant Animals (ed. Christie, W. W.), pp. 193–226. Pergamon Press, Oxford.Google Scholar
Devendra, C. and Lewis, D. 1974a. Fat in the ruminant diet: a review. Indian Journal of Animal Science 44: 917–938.Google Scholar
Devendra, C. and Lewis, D. 1974b. The interaction between dietary lipids and fibre in sheep. 2. Digestibility studies. Animal Production 19: 67–76.Google Scholar
Dijkstra, N. D. 1969. Influence of supplemented animal fats upon digestibility of ration components by ruminants. Netherlands Journal of Agricultural Science 17: 27–40.CrossRefGoogle Scholar
Garion, G. A. 1969. Lipid metabolism of farm animals. In Nutritional Aspects of Farm Animals (ed. Cuthbertson, D.), pp. 335–360. Pergamon Press, Oxford.Google Scholar
Honing, Y. Van Der, Wieman, B. J., Steg, A. and Donsellaar, B. Van. 1981. The effect of fat supplementation of concentrates on digestion and utilization of energy by productive dairy cows. Netherlands Journal of Agricultural Science 29: 79–92.CrossRefGoogle Scholar
Kelner, O. 1900. Untersuchungen über den Stoff-und Energieumsatz des erwachsenen Rindes bei Erhaltungs-und Produktionsfutter. Die Landwirtschaftlichen Versuchsstationen 53, 1.Google Scholar
Lawes, J. B. and Gilbert, J. H. 1853. On the composition of foods in relation to respiration and the feeding of animals. Report of the British Association for the Advancement of Science for 1852, London.Google Scholar
Lewis, D. and Payne, C. G. 1966. Fats and amino acids in broiler rations. 6. Synergistic relationships in fatty acid utilisation. British Poultry Science 7: 209–218.CrossRefGoogle Scholar
Lough, A. K. 1975. Aspects of lipid digestion and absorption in the ruminant. In Lipid Absorption: Biochemical and Clinical Aspects (ed. Rommel, K., Boebell, H. and Bohmer, R.), pp. 255–281. MTP Press.Google Scholar
Nehring, K. 1969. Estimation of crude cellulose in feedingstuffs. Archiv für Tierernährung 19: 453–473.Google Scholar
Oltjen, R. R. 1975. Fats for ruminants — utilization and limitations, including value of protected fat. Proceedings of the Georgia Nutrition Conference, pp. 31–40.Google Scholar
Perry, F. G. 1981a. The role of oils' and fats in ruminant diets. Feed Compounder 1: (10) 9–13.Google Scholar
Perry, F. G. 1981b. The role of oils and fats in pig diets. Feed Compounder 1: (11), 25–30.Google Scholar
Wainman, F. W., Dewey, P. J. S. and Smith, J. S. 1982. The energy value to sheep of tallow and of palm acid oil when added to a basal diet of barley and dried grass. In Energy Metabolism of Farm Animals (ed. Ekern, A. and Sundstøl, F.), pp. 116–119. Agricultural University of Norway, Aas-NLH.Google Scholar
Wiseman, J. ed. 1984. Fats in Animal Nutrition. Butterworths, London.Google Scholar