Document Detail


Methionine+cystine requirement of broiler chickens fed low-density diets under tropical conditions.
MedLine Citation:
PMID:  18607766     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Two experiments were conducted to determine the M+C requirement of straight-run broiler chickens (Hubbard x Hubbard) during the period 4-21 (Exp. 1) and 21-40 (Exp. 2) days of age. Experiments were conducted during summer months (July-August) in open-sided houses, thus exposing chicks to chronic heat stress. Daily min-max temperature averaged 26-37C (Exp. 1) and 23-36C (Exp. 2). M+C deficient basal diets were formulated to contain low-nutrient-density, i.e., 2750 kcal per kg ME, 20.1% CP (Exp. 1), and 2780 kcal per kg ME, 17.0% CP (Exp. 2). Diets were supplemented with DL-methionine to provide total M+C level ranging from 0.64 to 0.89 % (six increments) and 0.54 to 0.79% (six increments), respectively in experiment 1 and 2. Requirements (0.95 of the maximum quadratic response) were found to be 0.77 and 0.75% total M+C, respectively for gain and feed efficiency, during 4-21 days; and 0.67% total M+C for both gain and feed efficiency during 21-40 days of age. Calculated on the digestible M+C basis, the estimates were 0.67 and 0.65% respectively for gain and feed efficiency during 4-21 days of age; and 0.60% for gain and feed efficiency during 21-40 days of age.
Authors:
Usama Aftab; Muhammad Ashraf
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Publication Detail:
Type:  Journal Article     Date:  2008-07-08
Journal Detail:
Title:  Tropical animal health and production     Volume:  41     ISSN:  0049-4747     ISO Abbreviation:  Trop Anim Health Prod     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-02-03     Completed Date:  2009-05-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1277355     Medline TA:  Trop Anim Health Prod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  363-9     Citation Subset:  IM    
Affiliation:
Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan. usamaaftab@yahoo.com
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MeSH Terms
Descriptor/Qualifier:
Aging / physiology
Animal Feed
Animal Nutritional Physiological Phenomena / physiology*
Animals
Chickens / growth & development*,  metabolism
Cystine / administration & dosage*,  metabolism
Dietary Proteins / administration & dosage*,  metabolism
Dose-Response Relationship, Drug
Methionine / administration & dosage*,  metabolism
Nutritional Requirements*
Nutritive Value
Random Allocation
Seasons
Tropical Climate
Weight Gain / drug effects,  physiology
Chemical
Reg. No./Substance:
0/Dietary Proteins; 56-89-3/Cystine; 63-68-3/Methionine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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