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


     

J. Anim Sci. 1966. 25:1014-1018.
© 1966 American Society of Animal Science
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 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 Evans, J. L.
Right arrow Articles by Davis, G. K.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Evans, J. L.
Right arrow Articles by Davis, G. K.

Influence of Sulfur, Molybdenum, Phosphorus and Copper Interrelationships in Cattle upon Cellulose Digestion In Vivo and In Vitro1

Joe L. Evans2 and George K. Davis3

University of Florida, Gainesville,4

Abstract

In vivoand in vitrotrials were carried out to determine the effects of mineral interrelationships upon cellulose digestion by rumen microorganisms. Sulfur increased microbial activity for digesting cellulose. Sixty-five mcg. of S per milliliter of rumen fluid were optimum for rumen microorganisms which would be produced by feeding the dietary requirement of 0.29% S as Na2SO4 for ruminant animals. Phosphorus stimulated microbial activity in vivoand in vitroexcept for the 0.54% dietary level. Sulfur and P gave positive additive effects in vitro, and the depression produced by Cu was lessened by added S. The addition of Cu or Mo lessened the depressing effect of the other in the presence of P. With S, Mo, P and Cu additions in vitro, the effects of Mo and the remaining first and second order interactions were not different from the trial mean but were lower than an optimum control. The in vivobag technique gave significant differences among steers and among cellulose sources. Digestibility of cellulose was highest in purified cellulose, intermediate in cotton linters and lowest in sugar cane bagasse.

Footnotes

1 Florida Agricultural Experiment Stations Journal Series No. 2156.

2 Present address: Department of Animal Sciences, Rutgers University, New Brunswick, New Jersey.

3 The authors wish to acknowledge the assistance of W. 0. Ash, Statistics Department, University of Florida. Appreciation is expressed to the Brown Company, New York, New York; Hercules Powder Company, Wilmington. Delaware; United States Sugar Corporation, Clewiston, Florida: and Chas. Pfizer and Company, Terre Haute, Indiana, for Solka-Floc, cotton linters, sugar cane bagasse and vitamin A used in these trials.

4 Nutrition Laboratory, Department of Animal Science.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1966 by the American Society of Animal Science.