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 Knowlton, P. H. Articles by Belyea, P. C. Search for Related Content PubMed Articles by Knowlton, P. H. Articles by Belyea, P. C.

Hydrolyzed Leather Scrap as a Protein Source for Ruminants^{1 ,2,}

University of Maine, Orono 04473

Abstract

The potential of hydrolyzed leather scrap (HLS) as a protein source for ruminants was investigated by substituting HLS for soybean meal (SBM) in rations fed to sheep. HLS crude protein was isonitrogenously substituted for 0, 25, 50 and 75% of the SBM crude protein in rations containing approximately 13% crude protein. Four mature wethers were used in a 4 x 4 latin square design experiment consisting of a 16-day adjustment period, a 7-day digestion trial, and 2 days of heat and methane production measurements using indirect respiration calorimetry.

HLS was found to contain 93.12% dry matter, of which 75.35% was crude protein, 1.82% was ether extractable and 18.62% was ash. The gross energy value on a dry matter basis was 4.24 kcal/g and 3.00% of the dry matter was chromium.

When fed at a maintenance level, intake and animal health were not adversely affected by HLS inclusion at up to 6.3% of the ration. Other than crude protein values which were lower at the 50 and 75% substitution levels, apparent digestibilities of the ration components were not affected nor were rumen pH, volatile fatty acid or ammonia levels. The utilization of energy was affected only by a decrease in urinary energy. Chromium balance data were variable, but did not suggest extensive chromium retention.

¹ Department of Animal and Veterinary Sciences.

Partially supported by Agway, Inc., Syracuse, NY.

³ Present address: Ruminant Nitrogen Products Company, Adrian, MI.

⁴ The authors gratefully acknowledge the cooperation of W. Grady, Maine Reduction Company, Brooks, ME. in providing the hydrolyzed tannery by-product used in this study.