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 Asplund, J. M. Articles by Harris, L. E. Search for Related Content PubMed Articles by Asplund, J. M. Articles by Harris, L. E.

A Technique and Apparatus for the Study of Rate of Passage of Feed Residues through the Digestive Tract of Sheep¹

Utah State University, Logan

Abstract

Thoroughly dampened feed was treated with Sudan III dye in acetone. The dyed feed was dried and fed as part of the daily ration to sheep, and feces collected hourly for 60 hr. in an apparatus designed to change feces collection receptacles at hourly intervals. A ground sample of each collection was extracted with acetone and the optical density determined in a spectrophotometer. Cumulative recoveries of dyes were calculated and the mean retention time and 50% passage time were determined. The best estimates of total dye recovery were 55 to 95% with a mean ± standard deviation of 78 ± 14%. Mean retention times and 50% passage times ± the standard deviation for alfalfa hay, meadow hay and beet pulp were 25.8 ± 3.2, 32.7 ± 3.2; 33.4 ± 2.7, 36.5 ± 4.5; and 31.6 ± 8.4, 36.0 ± 9.2 hr., respectively.

¹ This investigation was supported in part by Utah Agricultural Experiment Station. Project 421 (W–94). Journal Paper No. 998.

² Research Associate in Animal Science, Utah State University. Present address: University of Missouri, Columbia.

³ Professor of Nutrition, Utah State University.