Hostname: page-component-7dd5485656-glrdx Total loading time: 0 Render date: 2025-10-30T22:41:34.148Z Has data issue: false hasContentIssue false
  • English
  • Français

The voluntary intake of hay and silage by lactating cows in response to ruminal infusion of acetate or propionate, or both, with or without distension of the rumen by a balloon

Published online by Cambridge University Press:  09 March 2007

J. N. Mbanya ,
M. H. Anil  and
J. M. Forbes
J. N. Mbanya
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT
M. H. Anil
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT
J. M. Forbes
Affiliation:
Department of Animal Physiology and Nutrition, University of Leeds, Leeds LS2 9JT
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In order to test the hypothesis that negative leedback signals from abdominal receptors are integrated in an additive manner in the control of voluntary food intake, cows with rumen fistulas were given intraruminal infusions of sodium acetate or sodium propionate, cr both, with or without distension of the rumen by balloon. Intakes were monitored during the 3 h experimental period and for 2 h after and samples of rumen fluid were taken for estimation of short-chain fatty acid concentrations and osmolality. Six cows in mid-lactation were fed on hay and concentrates and given, into the rumen. 5.5 mol sodium acetate, 5.2 mol sodium propionate and 7.51 of distension. Compared with the control (water infusion), neither acetate, propionate nor distension significantly depressed hay intake when given separately. When given in combination, however, the following significantly depressed intake during the 3 h treatment period: propionate + distension, acetate + distension, acetate + propionate + distension. Seven cows in early lactation were fed on silage and concentrates and given, into the rumen, 9.0 mol sodium acetate, 4.0 mol sodium propionate and 10.0 litres of distension. Again, none of the three given alone depressed silage intake to a significant extent during the 3 h treatment period, whereas the following combinations had a significant effect: propionate + distension, acetate + distension, acetate + propionate + distension. Basal rumen osmolalities were similar for the two types of feed but infusion of the sodium salts caused a very much greater increase with silage than with hay. The results are discussed with regard to the implications for our understanding of the control of voluntary intake and the likely role of chemo-, osmo- and mechano-receptors.

Keywords

Voluntary intakelntraruminal infusionsVolatile fatty acidsRumen distensionDairy cows

Information

Type
Effect of Rumenal Infusions on Food Intake
Information
British Journal of Nutrition , Volume 69 , Issue 3 , May 1993 , pp. 713 - 720
Copyright
Copyright © The Nutrition Society 1993

References

Adams, G. B. & Forbes, J. M. (1981). Additivity of effects of ruminal acetate and either portal propionate orrumen distension on food intake in sheep. Proceedings of the Nutrition Society 40, 44A.Google Scholar
Anil, M. H., Forbes, J. M. & Mbanya, J. N. (1987). Additive effects of acetate, propionate and distension of the rumen on hay intake by lactating cows. Journal of Physiology 386, 61P.Google Scholar
Anil, M. H., Mbanya, J. N., Symonds, H. W. & Forbes, J. M. (1993). Responses in the voluntary intake of hay or silage by lactating cows to intraruminal infusions of sodium acetate or sodium propionate, the tonicity of rumen fluid or rumen distension. British Journal of Nutrition 69, 699–712.CrossRefGoogle ScholarPubMed
Baile, C. A. & McLaughlin, C. L. (1970). Feed intake during volatile fatty acid iiijections into four gastric areas. Journal of Dairy Science 51, 1058–1063.CrossRefGoogle Scholar
Bergen, W. G. (1972). Rumen osmolality as a factor in feed intake control in sheep. Journal of Animal Science 34, 1054–1060.CrossRefGoogle Scholar
Bhattacharya, A. N. & Warner, R. G. (1968). Effect of propionate and citrate on depressed feed intake after intraruminal infusions of acetate in dairy cattle. Journal of Dairy Science 51, 1091–1093.CrossRefGoogle ScholarPubMed
Campling, R. C. (1970). Physical regulation of voluntary intake. In Physiology of Digestion and Metabolism in the Ruminant, pp. 226–234 [Phillipson, A. T., editor]. Newcastle, England: Oriel Press.Google Scholar
Campling, R. C. & Balch, C. C. (1961). Factors affecting the voluntary intake of food by cows. British Journal of Nutrition 15, 523–530.CrossRefGoogle ScholarPubMed
Carter, R. R. & Grovum, W. L. (1988). Observations on how sodium chloride loading of the rumen depresses food intake in sheep. Proceedings of the Nutrition Society 41, 155A.Google Scholar
Egan, A. R. (1970). Nutritional status and intake regulation in sheep. 6. Evidence for variation in setting of an intake regulatory mechanism relating to the digesta content of the reticulorumen. Australian Journal of Agricultural Research 21, 735–746.CrossRefGoogle Scholar
Forbes, J. M. (1986). The Voluntary Food Intake of Farm Animals. London: Butterworths.Google Scholar
Mbanya, J. N., Anil, M. H. & Forbes, J. M. (1989). Combined effects of intraruminal application of acetate, propionate and distension on silage intake by dairy cows. Animal Production 48, 639.Google Scholar
Montgomery, M. J., Schultz, L. H. & Baumgardt, B. R. (1963). Effect of intraruminal infusions of VFAs and lactic acid on voluntary hay intake. Journal of Dairy Science 48, 1380–1384.CrossRefGoogle Scholar
Statistical Analysis Systems (1982). SAS User's Guide; Statistics. Cary, North Carolina: SAS Institute Inc.Google Scholar
Ternouth, J. H. (1967). A factor limiting the ruminant's voluntary consumption of silage. Journal ofthe Ausrralian Institute of Agricultural Science 33, 263–264.Google Scholar
Ternouth, J. H. & Beattie, A. W. (1971). Studies of the food intake of sheep at a single meal. British Journal of Nutrition 25, 153–164.CrossRefGoogle Scholar
Tulloh, N. M. (1968). Physical studies of the alimentary tract of grazing cattle. IV. Dimensions of the tract in lactating and non-lactating cows. New Zealand Journal of Agricultural Research 9, 999–1008.CrossRefGoogle Scholar
Weston, R. H. (1984). Rumen digesta load in relation to voluntary feed consumption and rumination in roughagefed young sheep. Canadian Journal of Animal Science 64, Suppl., 324–325.CrossRefGoogle Scholar