Document Detail

Effect of low-protein diets having constant energy-to-protein ratio on performance and carcass characteristics of broiler chickens from one to thirty-five days of age.
MedLine Citation:
PMID:  18281572     Owner:  NLM     Status:  MEDLINE    
A trial was conducted to determine the effect of low-protein diets with constant ME:CP ratio on performance and carcass characteristics of broilers from 1 to 35 d of age. Four experimental diets were formulated to have 4 levels of CP and ME, respectively, in each phase: 23, 22, 21, and 20% CP with 3,036, 2,904, 2,772, and 2,640 kcal/kg in the starter phase (1 to 10 d); 22, 21, 20, and 19% CP with 3,146, 3,003, 2,860, and 2,717 kcal/kg in the grower phase (11 to 26 d); and 20, 19, 18, and 17% CP with 3,100, 2,945, 2,790, and 2,635 kcal/kg in the finisher phase (27 to 35 d). Digestible Lys was maintained at 1.10, 1.02, and 0.90% of the diet in the starter, grower, and finisher periods, respectively. A total of 1,760 one-day-old Hubbard broiler chickens were randomly divided into 16 experimental pens, 110 chickens in each pen, and each diet was offered to 4 replicates at random. Weight gain was linearly decreased (P < 0.001), whereas feed intake and feed conversion ratio were increased (P < 0.001) linearly as dietary protein and energy decreased during grower, finisher, and overall experimental periods. Protein efficiency ratio and energy efficiency ratio were decreased (P < 0.05) with low-CP and low-ME diets during the grower, finisher, and overall experimental period. However, carcass yield, breast meat yield, thigh yield, abdominal fat, and relative liver and heart weights were not affected by the treatments. Feeding broiler chickens low-CP diets with constant ME:CP ratio has adversely affected the growth performance, but carcass parameters were unaffected without any increase in abdominal fat content.
Z Kamran; M Sarwar; M Nisa; M A Nadeem; S Mahmood; M E Babar; S Ahmed
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Poultry science     Volume:  87     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-02-18     Completed Date:  2008-04-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  468-74     Citation Subset:  IM    
Institute of Animal Nutrition and Feed Technology, University of Agriculture, Faisalabad, Pakistan 38040.
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MeSH Terms
Age Factors
Animal Feed
Animal Nutritional Physiological Phenomena / physiology
Body Composition / drug effects*
Chickens / growth & development*
Diet, Protein-Restricted*
Dietary Proteins / administration & dosage*
Dose-Response Relationship, Drug
Energy Intake / physiology*
Energy Metabolism
Nutritional Requirements
Organ Size
Random Allocation
Weight Gain
Reg. No./Substance:
0/Dietary Proteins

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

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