J. Anim Sci.
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J. Anim Sci. 1973. 37:1408-1413.
© 1973 American Society of Animal Science
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Effects of Dietary Change or Rumen Inoculation upon Subsequent Daily Digestibility in the Ovine1

E. L. Potter2 and B. A. Dehority3, 4,

Ohio Agricultural Research and Development Center, Wooster 44691

Abstract

Dietary changes from orchardgrass hay to either corn silage, alfalfa hay or 60% rolled corn and 40% orchardgrass hay and then back to orchardgrass hay were used as treatment variables in Experiment 1. Dietary changes from orchardgrass hay to 60% corn and 40% orchardgrass hay and then back to orchardgrass hay were used in combination with rumen inoculations in Experiment 2. The influence of these treatment variables upon rumen adaptation were measured by changes in fecal dry matter output, dry matter digestion and cellulose digestion. Daily fecal dry matter and digestibility values for dry matter and cellulose were affected only during the first 5 days after dietary changes. In general, these changes appear to be related to the passage of previous feed residues through the tract. These data suggest that microbial adaptation in the rumen is very rapid when dietary changes are made in animals fed at the maintenance level.

Inoculation with rumen contents from an animal already on the diet to which the animals were being changed had no influence upon length of time required for adaptation.

Footnotes

1 Approved for publication as Journal Article No.8-73 by the Associate Director of the Ohio Agricultural Research and Development Center, Wooster.

2 Present address: Department of Animal Science, Eli Lilly & Company, Greenfield Indiana 46140.

3 The authors acknowledge the assistance of P. R. Krauss, Animal Technician and L. P. Bicksler, Laboratory Technician.

4 Department of Animal Science.






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Copyright © 1973 by the American Society of Animal Science.