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A note on the effects of dietary inclusion of a yeast culture on growth and ruminal metabolism of lambs given diets containing unground pelleted molassed dried sugar-beet pulp and barley in various proportions

Published online by Cambridge University Press:  02 September 2010

Y. Rouzbehan ,
H. Galbraith ,
J. A. Rooke  and
J. G. Perrott
Y. Rouzbehan
Affiliation:
School of Agriculture, 581 King Street, Aberdeen AB9 1UD
H. Galbraith
Affiliation:
Department of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
J. A. Rooke
Affiliation:
Animal and Feed Technology Department, Scottish Agricultural College, Aberdeen
J. G. Perrott
Affiliation:
Trident Feeds, PO Box 11, Peterborough UK
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Abstract

Twenty-eight Suffolk-cross male castrated lambs aged 7 to 8 months, initial live weight 36 (s.e. 149) kg were given four diets which contained unground pelleted molassed sugar-beet pulp and rolled barley (940 g/kg, fresh weight basis) in the following proportions either A, 0·8 to 0·2 or B, 0·5 to 0·5, with 60 g soya-bean meal per kg. Diets A and B were offered with or without a yeast culture product Yea-Sacc. Diets zvere offered twice daily to appetite with 100 g hay per head. Yeast culture had no effect on any measurement made (P > 0·05). Lambs given diet B consumed more dry matter (DM), grew faster and had superior food conversion efficiencies (all P < 0·01). Rumen fluid taken 3 h after feeding contained higher concentrations of ammonia (F < 0·01), total volatile fatty acids (F < 0·001) and acetic acid (F < 0·001) in samples from lambs given diet A. Rumen fluid samples collected before the 10·00 h meal, produced more gas from diet A than diet B after 6 and 24 h in vitro incubation (F < 0·001) suggesting the presence of more undigested food. When ground diets were incubated, more gas was produced from diet A after 6h (F < 0·05) but not after 24 h fP > 0·05). It is suggested that diet B supported faster growth of the lambs as a result of faster rate of digestion, higher DM intake and superior food conversion.

Keywords

growthlambsrumen fermentationsugar-beet pulpyeast
Type
Research Article
Information
Animal Production , Volume 59 , Issue 1 , August 1994 , pp. 147 - 150
Copyright
Copyright © British Society of Animal Science 1994

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References

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