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 Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Schneider, B. H. Articles by Cipolloni, M. A. Search for Related Content PubMed PubMed Citation Articles by Schneider, B. H. Articles by Cipolloni, M. A.

The Value of Average Digestibility Data¹

West Virginia Agricultural Experiment Station

Abstract

Using published data for five classes of feeds fed to four species of animals, the value of average digestibility data in the assessment of the nutritive value of particular feed samples has been studied by statistical methods. The criterion of value used was the ratio, expressed as a percentage, of the between-and within-feed variances for digestion coefficients and T.D.N. The ratio measures the relative increase in precision with which nutritive value is assessed if one uses separate digestion coefficients for each kind of feed, as compared to not considering digestibility at all or assuming that all feeds in a class have the same average digestibility.

The increases in precision if separate digestion coefficients are used may be expected to be moderate to marked for almost all nutrients in all feeds. If digestibility is adjusted for proximate composition the increases in precision may be expected

¹ Supported in part by a grant from Swift and Company, Chicago, Illinois. Published with the approval of the Director, West Virginia Agricultural Experiment Station, as Scientific Paper No. 416.

² West Virginia University.

³ Institute of Statistics, University of North Carolina, Raleigh.