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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Dozier, W. A. Articles by Kidd, M. T. Search for Related Content PubMed Articles by Dozier, W. A., III Articles by Kidd, M. T.

Threonine Requirement of Broiler Males from 42 to 56 Days in a Summer Environment

Poultry Science Department and Alabama Agricultural Research Station Auburn University, AL 36849-5416

M. T. Kidd

Nutri-Quest, Inc. 1400 Elbridge Payne Road Suite 110 Chesterfield, MO 63017

Correspondence: W. A. Dozier, III, E-mail:bdozier{at}uga.edu

Amino acid requirements of broilers may be altered during extreme environmental conditions. Threonine is a limiting amino acid for broilers, particularly at finishing when a hot environment would decrease feed intake. The dietary threonine requirement was examined with male broilers from 42 to 56 days of age during summer roduction. Birds were given a common feeding regimen until 6 wk of age, then six experimental diets consisting of progressive increments of threonine that ranged from 0.50 to 0.80% were fed from 42 to 56 days of age. Feed conversion was optimized at a total dietary threonine concentration approximating 0.67% of the diet; however, growth rate and feed consumption were not significantly affected by dietary threonine. Increasing dietary threonine did not alter carcass yield nor the proportions of abdominal fat and Grade A carcasses, but, breast fillet weight and its relative yield was maximized at 0.62% dietary threonine. Threonine need for male broilers is less for optimum breast meat recovery than feed conversion ratio during hot temperature conditions.

Key Words: Amino acid • breast fillet • broiler • threonine

This article has been cited by other articles:

				W. A. Dozier III, A. Corzo, M. T. Kidd, and M. W. Schilling Dietary Digestible Lysine Requirements of Male and Female Broilers from Forty-Nine to Sixty-Three Days of Age Poult. Sci., July 1, 2008; 87(7): 1385 - 1391. [Abstract] [Full Text] [PDF]

				W. A. Dozier III, R. W. Gordon, J. Anderson, M. T. Kidd, A. Corzo, and S. L. Branton Growth, Meat Yield, and Economic Responses of Broilers Provided Three- and Four-Phase Schedules Formulated to Moderate and High Nutrient Density During a Fifty-Six-Day Production Period J. Appl. Poult. Res., January 1, 2006; 15(2): 312 - 325. [Abstract] [Full Text] [PDF]