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The voluntary intake and digestibility by cattle and sheep of dried grass wafers containing particles of different size

Published online by Cambridge University Press:  02 September 2010

R. J. Wilkins ,
C. R. Lonsdale ,
R. M. Tetlow  and
T. J. Forrest
R. J. Wilkins
Affiliation:
The Grassland Research Institute, Hurley, Berks
C. R. Lonsdale
Affiliation:
The Grassland Research Institute, Hurley, Berks
R. M. Tetlow
Affiliation:
The Grassland Research Institute, Hurley, Berks
T. J. Forrest
Affiliation:
The Grassland Research Institute, Hurley, Berks
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Summary

Wafers of dried grass which differed in particle size (modulus of fineness) were prepared and fed ad libitum to cattle and sheep. The response of the two classes of stock to the feeds was similar. The digestibility of organic matter and of cellulose decreased with decrease in modulus of fineness (more fine particles) and this was associated with more rapid passage of the finely-milled material through the alimentary tract. Organic matter intake generally increased with decrease in modulus of fineness, but the pattern of response differed between experiments. In one experiment the difference in voluntary intake between feeds with modulus of fineness of 2·5 and 1·0 was less than 5% and not significant, but in a second experiment the intake of feed with modulus of fineness of 2·1 was 18% lower than that of feed with modulus of fineness of 1·0. In the first experiment the wafers broke down during handling and feeding with the result that the feed of low modulus of fineness was extremely dusty, but in the second experiment a binding agent was included and little breakdown of wafers occurred. It is suggested that dustiness may have restricted the intake of some of the feeds in the first experiment. Intakes of digestible organic matter did not differ significantly between treatments in either experiment.

Type
Research Article
Information
Animal Production , Volume 14 , Issue 2 , April 1972 , pp. 177 - 188
Copyright
Copyright © British Society of Animal Science 1972

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References

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