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The effects of rate of release of organic matter and nitrogen in the rumen on growth and metabolism of growing ewe lambs

Published online by Cambridge University Press:  05 November 2021

M.W. Witt ,
L.A. Sinclair ,
R.G. Wilkinson  and
P.J. Buttery
M.W. Witt
Affiliation:
Harper Adams Agricultural College, Edgmond, Newport, Shropshire TF10 8NB, UK
L.A. Sinclair
Affiliation:
Harper Adams Agricultural College, Edgmond, Newport, Shropshire TF10 8NB, UK
R.G. Wilkinson
Affiliation:
Harper Adams Agricultural College, Edgmond, Newport, Shropshire TF10 8NB, UK
P.J. Buttery
Affiliation:
University of Nottingham, Dept. ABFS, Sutton Bonmgton Campus, Loughborough, Leics LE12 5RD, UK
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Extract

Formulation of diets mat are synchronous for the hourly energy and nitrogen release in the rumen increase the efficiency of microbial protein synthesis (Sinclair et al,1993). However few trials have been conducted that have investigated whether this is translated into a whole animal production response. Rate of degradation of energy and nitrogen (N) components of feeds have been classified as fast, medium or stow (Johnson, 1976). Diets containing high proportions of quickly degradable nitrogen but low amounts of quickly fermentable carbohydrate result in an uncoupling of fermentation decreasing the efficiency of use of dietary nutrients (Rooke et al., 1987). The objective of the experiment was to study the effects of synchronising the rate of energy and nitrogen supply to the rumen in diets with two rates of carbohydrate release on growth and metabolism in ewe lambs.

Type
Sheep Nutrition
Information
Proceedings of the British Society of Animal Science , Volume 1996 , March 1996 , pp. 163
Copyright
Copyright © The British Society of Animal Science 1996

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References

Johnson, R.R. 1976. Influence of carbohydrate solubility on non protein nitrogen utilisation in the ruminant. J. Anim. Sci. 43. 184–191.10.2527/jas1976.431184xCrossRefGoogle Scholar
Rooke, J.A, Lee, N.H. and Armstrong, D.G. 1987. The effects of intraruminal infusions of urea, casein, glucose syrup and a mixture of casein and glucose syrup on nitrogen digestion in the rumen of cattle receiving grass silage diets. British J. Nutr. 57.89–98.10.1079/BJN19870012CrossRefGoogle Scholar
Sinclair, L.A., Garnsworthy, P.C., Newbold, J.R. and Buttery, P.J. 1993. Effect of synchronizing the rate of dietary energy and nitrogen release on rumen fermentation and microbial protein synthesis in sheep. J. Agric. Sci., Camb. 120. 251–263.10.1017/S002185960007430XCrossRefGoogle Scholar