Propionate supplementation did not increase whole body glucose turnover in growing lambs fed rye grass |
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Authors: | Majdoub Linda Beylot Michel Vermorel Michel Ortigues-Marty Isabelle |
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Affiliation: | Unité de Recherches sur les Herbivores, INRA Theix, 63122 Saint-Genès-Champanelle, France. |
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Abstract: | The objective of the present study was to investigate the effects of propionate supplementation on whole body glucose turnover in growing lambs fed frozen rye-grass at 1.5 x maintenance using [1-13C]-glucose. Intraruminal infusion of propionate (0.55 and 0.91 mol x d(-1)) increased the ruminal molar proportions of propionate from 25% with the control to 40% with the highest propionate treatment. It did not however modify glucose turnover (26 mmol x d(-1) x kg(-1)), nor the conversion of its carbon into L-lactate (21%) and alanine (21%), nor glucose recycling (9%). All of the results suggest that in the present conditions glucose turnover and metabolism were not influenced by the supply of propionate. |
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