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Soya oil in diet for growing-fattening bulls : effects on metabolism in the rumen and on apparent digestibility

Published online by Cambridge University Press:  24 November 2017

A. Clinquart ,
C. Van Eenaeme ,
L. Istasse ,
K. Neirinck ,
G. Midy  and
J.M. Bienfait
A. Clinquart
Affiliation:
Service de Nutrition, Facultè de Mèdecine Vètèrinaire, rue des Vètèrinaires, 45 - 1070 Brussels - Belgium
C. Van Eenaeme
Affiliation:
Service de Nutrition, Facultè de Mèdecine Vètèrinaire, rue des Vètèrinaires, 45 - 1070 Brussels - Belgium
L. Istasse
Affiliation:
Service de Nutrition, Facultè de Mèdecine Vètèrinaire, rue des Vètèrinaires, 45 - 1070 Brussels - Belgium
K. Neirinck
Affiliation:
Service de Nutrition, Facultè de Mèdecine Vètèrinaire, rue des Vètèrinaires, 45 - 1070 Brussels - Belgium
G. Midy
Affiliation:
Service de Nutrition, Facultè de Mèdecine Vètèrinaire, rue des Vètèrinaires, 45 - 1070 Brussels - Belgium
J.M. Bienfait
Affiliation:
Service de Nutrition, Facultè de Mèdecine Vètèrinaire, rue des Vètèrinaires, 45 - 1070 Brussels - Belgium
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Extract

The diets for growing-fattening bulls in Belgium are usually high in concentrate (Van Eenaeme, Istasse, Gabriel, Clinquart, Maghuin Register and Bienfait, 1990). The fat content of such diets in usually low at about 0.025. Over the recent years, feed manufacturers have incorporated fat in fattening diets. The incorporation rates are usually rather low so that the ether extract content is about 0.05 in fat supplemented regimes. At such rates upsets of intake and digestion and depression of growth could be avoided (Zinn, 1989). The fat concentrates which are incorporated are usually blends of various and very often unknown origins. Conflicting observations were reported on the effects of fat supplementation. Two experiments were carried out to assess the effects of soya oil on metabolism in the rumen and on apparent digestibility.

Type
Ruminant Nutrition
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1991 , March 1991 , pp. 103
Copyright
Copyright © The British Society of Animal Production 1991

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References

Mehrez, A.Z. and Orskov, E.R. 1977. Study of the artificial fiber bag technique for determining the digestibility of feeds in the rumen. Journal of Agricultural Science, Cambridge 88: 645–650.Google Scholar
Van Eenaeme, C., Istasse, L., Gabriel, A., Clinquart, A., Maghuin-Rogister, G. and Bienfait, J.M. 1990. Effects of dietary carbohydrate composition on rumen fermentation, plasma hormones and metabolites on growing-fattening bulls. Animal Production 50: 409–416.Google Scholar
Zinn, R.A. 1989. Influence of level and source of dietary fat on its comparative feeding value in finishing diets for steers : feedlot cattle growth and performance. Journal of Animal Science 67: 1029–1037.CrossRefGoogle ScholarPubMed