The role of gut tissue in the energy metabolism of growing lambs fed forage or concentrate diets

The role of the gastrointestinal tract (GIT) in explaining the less efficient utilization of metabolizable energy (ME) in growing lambs fed forage rather than concentrate-based diets was investigated by feeding forage (legume–grass silage) and concentrate (whole shelled maize) diets, at isoenergetic...

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Bibliographic Details
Published in:British journal of nutrition 2001-08, Vol.86 (2), p.257-264
Main Authors: Finegan, Esther J., Buchanan-Smith, Jock G., McBride, Brian W.
Format: Article
Language:English
Subjects:
Animal Feed
Animals
Biological and medical sciences
Body Weight
Concentrate
Diet
Energy Metabolism - physiology
Forage
Fundamental and applied biological sciences. Psychology
Gastrointestinal tract
Grass silage
Gut energy metabolism
Intestine. Mesentery
Intestines - physiology
Linear Models
Male
Oxygen uptake
Random Allocation
Sheep - growth & development
Sheep - metabolism
Sheep - physiology
Thermogenesis
Vertebrates: digestive system
Weaning
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Summary:The role of the gastrointestinal tract (GIT) in explaining the less efficient utilization of metabolizable energy (ME) in growing lambs fed forage rather than concentrate-based diets was investigated by feeding forage (legume–grass silage) and concentrate (whole shelled maize) diets, at isoenergetic intakes (ME basis), using five groups of lambs. One group of seven lambs was an initial slaughter group and of the two groups (eight lambs per group) fed each diet, one group was fed for 8 weeks, whereas the other group was fed for 16 weeks. All lambs were slaughtered between 18·5 and 20 h following their last meal. Retained energy (as a percentage of ME intake) was higher (concentrate-fed 28, forage-fed 17; P
ISSN:0007-1145
1475-2662
DOI:10.1079/BJN2001393