J. Anim Sci.
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J. Anim Sci. 1974. 38:1272-1275.
© 1974 American Society of Animal Science
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Digestion of Wheat Bran by Calves and Pigs

Robert M. Saunders1, Margaret A. Connor1, George O. Kohler1 and Lynn G. Blaylock2

U. S. Department of Agriculture,1, Berkeley, California

Abstract

A diet containing 30% wheat bran has been fed to calves and pigs. Examination of the feces showed the aleurone layer of the bran was almost totally digested by each animal. This is possibly the reason why pigs show a metabolizable energy value for wheat bran like that of a ruminant rather than a nonruminant animal. Neither animal digested entirely the bran protein or carbohydrates. In each case the bran residue in the feces contained about 15% protein. Acid hydrolysis of the fecal bran residue yielded glucose, xylose, arabinose and galactose in both species.

Wheat millfeeds have been reported to have a higher metabolizable energy value for pigs than for chicks, even though the pig, like the chick, is a monogastric animal. The values for the pig are close to those values reported for cattle (Crampton and Harris, 1969). The higher values reported for the pig compared to the chick are numerous in the literature (Crampton and Harris, 1969), and in the case of wheat bran and shorts, Young (1971) has shown that bran has a metabolizable energy for pigs 59% higher than for chicks, and shorts a value 62% higher. No reports appear to exist suggesting the reason for the unexpectedly high values reported for the pig. This study is an attempt to establish which entities within the millfeed fraction are contributing to its higher metabolizable energy for pigs and cattle than for the chick.

Footnotes

1 Agricultural Research Service, Western Regional Research Laboratory, Berkeley, California.

2 Supersweet—Research Farm, Box 117, Courtland, Minnesota.






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Copyright © 1974 by the American Society of Animal Science.