Document Detail

Influence of enzyme supplementation of maize-soyabean meal diets on carcase composition, whole-body nutrient accretion and total tract nutrient retention of broilers.
MedLine Citation:
PMID:  18704790     Owner:  NLM     Status:  MEDLINE    
1. Carcase composition, whole body nutrient accretion rates and total tract nutrient retention of broilers in response to supplemental phytase or carbohydrase and protease from 0 to 21 d of age were investigated. 2. A total of 480 broilers were allocated to 4 slaughter groups (SG) of 30, 150, 150 and 150 broilers. Thirty broilers, in 6 replicates of 5 birds, comprised the initial SG killed at d 0; 150 broilers were allocated to each of the d 7, 14 and 21 final SG. Broilers in the final SG were allocated to 5 treatments in a randomised complete block design; each treatment had 6 replicate cages of 5 broilers per replicate cage. 3. The diets were maize-wheat-soyabean based and the treatments were: (1) positive control which met NRC (1994) energy and nutrients requirements for broiler, (2) negative control (NC) deficient in metabolisable energy (ME) and P, (3) NC plus phytase added at 1000 FTU/kg, (4) NC plus cocktail of xylanase, amylase and protease (XAP), and (5) NC plus phytase and XAP. 4. Except for ash and Ca, the treatments had no effect on carcase composition. Phytase or XAP individually or combined had variable effects on body nutrient accretion rates at various age periods of the broilers compared with the NC diet. Phytase alone or combined with XAP consistently improved body accretion rates of DM, protein, fat, ash, Ca, and P. 5. Addition of phytase alone or combined with XAP to the NC diet improved total tract N and P retention compared with the NC diet. Cocktail of XAP alone or combined with phytase improved Ca retention. Combination of phytase and XAP improved metabolisable energy (ME) and dry matter retention. 6. Overall, the results showed that the exogenous enzymes used had greater effects on the rates of nutrient accumulation in the carcase rather than on the proportion of nutrients deposited in the carcase.
O A Olukosi; A J Cowieson; O Adeola
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  British poultry science     Volume:  49     ISSN:  1466-1799     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-08-15     Completed Date:  2008-10-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  436-45     Citation Subset:  IM    
Department of Animal Sciences, Purdue University, West Lafayette, IN, USA.
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MeSH Terms
6-Phytase / metabolism,  pharmacology*
Animal Feed / analysis*
Animal Nutritional Physiological Phenomena
Body Composition / drug effects
Chickens / physiology*
Diet / veterinary*
Weight Gain
Zea mays*
Reg. No./Substance:
7440-70-2/Calcium; 7723-14-0/Phosphorus; EC

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

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