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Journal of Experimental Biology 28,83-90 (1951)
Published by Company of Biologists 1951

Fermentation in the Rumen of the Sheep : II. The Production and Absorption of Volatile Fatty Acids during the Fermentation of Wheaten Hay and Lucerne Hay in the Rumen

F. V. GRAY 1 and A. F. PILGRIM 1

1 Commonwealth Scientific and Industrial Research Organization, Division of Biochemistry and General Nutrition, University of Adelaide

1. Analyses of the rumen fluid of sheep fed on wheaten hay and on lucerne hay showed that characteristic changes take place in the composition of the mixture of volatile fatty acids in the rumen throughout the day.

2. The changes conform closely to those predicted from the composition of the mixture of fatty acids produced from the same two fodders in vitro. They support the view that propionic acid is relatively more rapidly absorbed than either acetic or butyric acid, and that the fermentation of these fodders in the rumen produces a mixture of the acids in which propionic acid forms a larger proportion than it does in the rumen fluid.

Submitted on July 24, 1950




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© The Company of Biologists Ltd 1951