HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Burroughs, W. Articles by Schalk, A. F. Search for Related Content PubMed Articles by Burroughs, W. Articles by Schalk, A. F.

The Amounts of Feeds and Nutrients in the Rumen of Cattle throughout a 24-Hour Period as Affected by Plane of Feeding and Character of Ration

Ohio Agricultural Experiment Station

Abstract

Rumen contents of steers were examined every 4 hours throughout 24-hour periods for purposes of gathering information pertaining to fundamental rumen physiology in the utilization of feeds by cattle. Two rumen fistula steers were fed successively three rations at three levels of feeding. The composition of the rations differed only in the form of corn used: whole shelled corn, ground shelled corn, and ground ear corn. The rumen ingesta examinations included the weight of the wet material and the following analysis, dry matter, protein, crude fiber, ether extracts, and ash. Estimations of the amounts of feeds existing in the ingesta throughout the day were made by physical separation methods and mathematical determinations based upon nutrient analysis. Only slight differences were noted in the rumen contents when whole shelled corn was compared with ground shelled corn; whereas marked differences in the water and fiber make-up of the rumen existed when ground ear corn was fed. The significance of these differences can be evaluated only in part at present, since information is incomplete concerning conditions favorable to rumen micro-organisms in bringing about fiber digestion and synthesis of protein and vitamin nutrients.

¹ Resigned February 1944.