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In vitro and in vivo rumen protection of proteins coated with calcium soaps of long-chain fatty acids

Published online by Cambridge University Press:  27 March 2009

D. Sklan
D. Sklan
Affiliation:
Faculty of Agriculture, Hebrew University, P.O. Box 12, Rehovot 76–100, Israel
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Summary

The in sacco, in vitro and in vivo effects of feeding proteins partially coated with calcium soaps of longchain fatty acids were examined.

In sacco, 84–90% of whey powder and soya-bean meal coated with calcium salts of fatty acids remained after 20 h incubation in the rumen of sheep. In vitro tests revealed no effects on volatile fatty acid or ammonia production.

In vivo sheep balance studies, where soya-bean meal coated with calcium soaps was substituted for soya-bean meal, showed no effects on ammonia or volatile fatty acid production in the rumen due to the calcium soap coated proteins. No changes were observed in digestibilities of dry matter, nitrogen or acid detergent fibre; total fatty acid digestion increased. Nitrogen balance was improved slightly in sheep fed the protected protein.

It appears that proteins coated with calcium soaps are not degraded in the rumen and thus energy and non-degradable protein can be supplied to ruminants by this route.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 112 , Issue 1 , February 1989 , pp. 79 - 83
Copyright
Copyright © Cambridge University Press 1989

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References

Brumby, P. E., Storry, J. E., Bines, J. A. & Fulford, R. J. (1978). Utilization of energy for maintenance and production in dairy cows given protected tallow during early lactation. Journal of Agricultural Science, Cambridge 91, 151–159.CrossRefGoogle Scholar
Chalupa, W., Rickabaugh, B., Kronfeld, D. S. & Sklan, D. (1984). Rumen fermentation in vitro as influenced by long chain fatty acids. Journal of Dairy Science 67, 1439–1444.CrossRefGoogle ScholarPubMed
Conway, E. J. (1957). Microdiffusion Analysis and Volumetric Error, pp. 90–101. London: Crosby Lockwood & Son.Google Scholar
Goering, H. K. & Van Soest, P. J. (1970). Forage Fiber Analysis. Agriculture Handbook No. 379. Agricultural Research Service. Washington, D.C.: U.S. Department of Agriculture.Google Scholar
Jenkins, T. C. & Palmquist, D. L. (1984). Effect of fatty acid or calcium soaps on rumen and total nutrient digestibility of dairy rations. Journal of Dairy Science 67, 978–984.CrossRefGoogle ScholarPubMed
Lindberg, J. E. (1985). Estimation of rumen degradability of feed proteins with the in sacco technique and various in vitro methods. A review. Acta Agriculture Scandinavia, Suppl. 25, 64–97.Google Scholar
Palmquist, D. L. (1984). Use of fats in diets for lactating dairy cows. Fats in Animal Nutrition (ed. Wiseman, J.), pp. 183–199. London: Butterworths.Google Scholar
National Research Council (1985). Ruminant Nitrogen Usage, p. 73. Washington, D.C.: National Academy Press.Google Scholar
Schneider, P., Sklan, D., Chalupa, W. & Kronfeld, D. S. (1988). Feeding calcium salts of fatty acids to dairy cows. Journal of Dairy Science 71, 2143–2150.CrossRefGoogle Scholar
Sklan, D., Arieli, A., Chalupa, W. & Kronfeld, D. S. (1985). Digestion and absorption oflipidsand bile acids in sheep fed stearic acid, oleic acid or tristearin. Journal of Dairy Science 68, 1667–1675.CrossRefGoogle ScholarPubMed
Sklan, D., Hurwitz, S., Ascarelli, I. & Buoowski, P. (1975). Fat digestion and absorption in chicks fed raw or heated soybean meal. Journal of Nutrition 105, 57–63.CrossRefGoogle Scholar
Snedecor, G. W. & Cochran, W. G. (1967). Statistical Methods. Ames, Iowa: Iowa State University Press.Google Scholar