J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Fluharty, F. L.
Right arrow Articles by Dehority, B. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Fluharty, F. L.
Right arrow Articles by Dehority, B. A.

Journal of Animal Science, Vol 74, Issue 2 465-474, Copyright © 1996 by American Society of Animal Science

JOURNAL ARTICLE

Effects of feed and water deprivation on ruminal characteristics and microbial population of newly weaned and feedlot-adapted calves

F. L. Fluharty, S. C. Loerch and B. A. Dehority
Department of Animal Science, Ohio Agricultural Research and Development Center, Ohio State University, Wooster 44691, USA.

Two experiments were conducted to determine the effects of length of feed and water deprivation on ruminal microbes and ruminal characteristics. In Exp. 1, treatments were as follows: 1) weaned, but not trucked (0 h), 2) weaned, trucked, and fasted for 48 h (48 h), and 3) weaned, trucked, and fasted for 72 h (72 h). On d 0 (arrival back at the feedlot after treatment), DMI, ruminal contents (P < .05) decreased as length of feed and water deprivation increased. However, on d 4, there were no longer any differences (P > .10) in DMI or weight of ruminal contents. On d 0, percentage of ruminal DM in the 48- and 72-h treatment groups was lower (P < .01) than in the 0-h treatment group, but there were no differences (P > .10) by d 4. After the steers used in Exp. 1 had been in the feedlot for 28 h, they were reallotted, and the three treatments (except for weaning) were repeated; the 0-h group remained at the feedlot. On d 0, DMI of the 48-h group was lower (P < .05) than that of the 0-h group; DMI of the 72-h group was intermediate. On d 0, the 0-h treatment group had a greater ruminal DM percentage than the 48- and 72-h treatment groups (P < .05); however, due to large within-treatment variation the total weight of ruminal contents did not differ (P > .10) among treatments. There were no decreases (P > .10) in cellulolytic or total bacterial concentration or in the ruminal numbers of cellulolytic or total bacteria due to length of feed and water deprivation on d 0 in either Exp. 1 or 2. In both trials, 48 and 72 h of feed and water deprivation decreased (P < .05) protozoal numbers on d 0 and 4 compared with the 0-h treatment group.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1996 by the American Society of Animal Science.