Hostname: page-component-77c89778f8-gq7q9 Total loading time: 0 Render date: 2024-07-18T19:27:36.306Z Has data issue: false hasContentIssue false
  • English
  • Français

Partitioning degradation of feeds between different segments of the equine digestive tract

Published online by Cambridge University Press:  27 February 2018

J. J. Hyslop
J. J. Hyslop*
Affiliation:
Dept Vet Clinical Studies, Edinburgh University, Easter Bush Vet Centre, Roslin, Midlothian EH25 9RG UK
Get access

Abstract

This paper describes how experimental adaptation of the mobile bag and in situ porous bag techniques for use in nutrition studies with equines, combined with mathematical modelling of feed degradation profiles and digesta passage rates, allows the quantitative partition of feed degradation amongst the major segments of the equine digestive tract. Dry matter effective degradability values in the small intestine (pre–caecal), caecal and colonic segments of the equine digestive tract for four fibre feeds are presented. Measurement of digesta passage rates in the caecum and total tract of equines are also discussed. Further studies are now required to capitalise on this development and partition degradation of individual feed constituents in common equine feeds across each of the major segments of the equine digestive tract. This would allow optimum, balanced and healthy diets to be formulated in practice across a wide range of equine husbandry systems.

Type
Research Article
Information
BSAP Occasional Publication , Volume 32: Emerging Equine Science , 2004 , pp. 97 - 111
Copyright
Copyright © British Society of Animal Production 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Applegate, C. S. and Herschberger, T. V. (1969). Evaluation of in vitro and in vivo caecal fermentation techniques for estimating the nutritive value of forages for equine. Journal of Animal Science. 28: 18–22.CrossRefGoogle Scholar
Cottrell, D. F., Jones, A. J. and Potter, K. E. (1998). Gas handling in the caecum of the horse. Experimental Physiology. 83: 397–408.Google Scholar
Dhanoa, M.S. (1988). On the analysis of dacron bag data for low degradability feeds. Grass and Forage Science. 43: 441–444.CrossRefGoogle Scholar
Dhanoa, M. S., Siddons, R. C., France, J. and Gale, D. L. (1985). A multicompartmental model to describe marker excretion patterns in ruminant faeces. British Journal of Nutrition. 53: 663–671.Google Scholar
Drogoul, C., Faurie, F. and Tisserand, J. L. (1995). Estimation of the contribution of the pony's colon in fibre digestion: a methodological approach. Annales de Zootechnie. 44 (Supp): 182.Google Scholar
Ellis, W.C., Matis, J.H., Hill, T.M. and Murphy, M. R. (1994). Methodology for estimating digestion and passage kinetics of forages. In: Forage Quality, Evaluation and Utilisation. Edited by Fahey, G.C., Collins, M., Mertens, D.R. and Moser, L.E.. American Society of Agronomy, Madison, WI, USA. pp. 682–756.Google Scholar
Grovum, W. L. and Williams, V. J. (1973). Rate of passage of digesta in sheep. 4. Passage of marker through the alimentary tract and the biological relevance of rate–constants derived from the changes in concentration of marker in faeces. British Journal of Nutrition. 30: 313–329.Google Scholar
Hvelplund, T. (1985). Digestibility of rumen microbial protein and undegraded dietary protein estimated in the small intestine of sheep and by in sacco procedure. Acta Agriculturae Scandinavica. 25 (Supp): 132–144.Google Scholar
Hyslop, J.J., McLean, B.M.L., Moore–Colyer, M.J.S., Longland, A.C., Cuddeford, D. and Hollands, T. (1999a). Measurement of caecal outflow rate in ponies using Chromium mordanted feeds. Proceedings of the British Society of Animal Science, BSAS, Penicuik, Midlothian, UK. pp. 141.Google Scholar
Hyslop, J.J., Stefansdottir, G.J., McLean, B.M.L., Longland, A.C. and Cuddeford, D. (1999b). In situ incubation sequence and its effect on degradation of feed components when measured in the caecum of ponies. Animal Science. 69: 147–156.Google Scholar
Hyslop, J.J., Tomlinson, A. L., Bayley, A. and Cuddeford, D. (1998). Development of the mobile bag technique to study the degradation dynamics of forage feed constituents in the whole digestive tract of equids. Proceedings of the British Society of Animal Science, BSAS, Penicuik, Midlothian, UK. pp. 129.Google Scholar
Macheboeuf, D., Poncet, C., Jestin, M. and Martin–Rossett, W. (1996). Use of a mobile nylon bag technique with caecum fistulated horses as an alternative method for estimating precaecal and total tract nitrogen digestibility. Proceedings of the European Association of Animal Production 47th Annual Meeting – Lillihammer, Norway. pp. 297.Google Scholar
McLean, B.M.L. (2001). Methodologies to determine digestion of starch in ponies. PhD Thesis. University of Edinburgh, Scotland.Google Scholar
McLean, B.M.L., Hyslop, J.J., Longland, A.C., Cuddeford, D. and Hollands, T. (1999). Development of the mobile bag technique to determine the degradation kinetics of purified starch sources in the pre–caecal segment of the equine digestive tract. Proceedings of the British Society of Animal Science, BSAS, Penicuik, Midlothian, UK. pp. 138.Google Scholar
Mehrez, A.Z. and Ørskov, E.R. (1977). A study of the artificial fibre bag technique for determining the digestibility of feeds in the rumen. Journal of Agricultural Science (Cambridge). 88: 645– 650.Google Scholar
Miraglia, N., Martin–Rosset, W. and Tisserand, J. L. (1988). Mesure de la digestibilite des fourrages destines aux chevaux par la technique des sacs de nylon. Annales de Zootechnie. 37: 13–20.Google Scholar
Moore–Colyer, M.J.S. (2000). Studies on the degradation kinetics of botanically diverse fibrous feeds and their apparent digestibility and rate of passage when fed to ponies. PhD Thesis, University of Edinburgh, Scotland.Google Scholar
Moore–Colyer, M.J.S., Hyslop, J.J., Longland, A.C. and Cuddeford, D. (2002). The mobile bag technique as a method for determining the degradation of four botanically diverse fibrous feedstuffs in the small intestine and total digestive tract of ponies. British Journal of Nutrition. 88: 729–740.Google Scholar
Moore–Colyer, M.J.S., Morrow, H. J. and Longland, A.C. (2003). Mathematical modelling of digesta passage rate, mean retention time and in vivo apparent digestibility of two different lengths of hay and big–bale grass silage in ponies. British Journal of Nutrition. 90: 109–118.Google Scholar
Ørskov, E.R. and McDonald, I. (1979). The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agricultural Science (Cambridge). 92: 499–503.Google Scholar
Pond, K. R., Ellis, W. C., Matis, J. H., Ferreiro, H. M. and Sutton, J. D. (1988). Compartment models for estimating attributes of digesta flow in cattle. British Journal of Nutrition. 60: 571–595.Google Scholar
Sauer, W.C., Jorgenson, H. and Berzins, R. (1983). A modified nylon bag technique for determining apparent digestibilities of protein in feedstuffs for pigs. Canadian Journal of Animal Science. 63: 233–237.Google Scholar