Document Detail

Previous exposure to dietary phytase reduces the endogenous energy losses from precision-fed chickens.
MedLine Citation:
PMID:  19904639     Owner:  NLM     Status:  MEDLINE    
1. A precision feeding experiment was conducted with broiler chickens, which were previously fed on diets with or without phytase, to study the effects of previous exposure to dietary phytase supplementation on the excretions of endogenous energy, nitrogen, amino acids and minerals. 2. Female Ross 308 broiler chickens, which had previously received one of 4 experimental diets (low P maize/soy diets (control, D), D + 250 international units of phytase per kg diet (FTU), D + 500 FTU and D + 2500 FTU) were used in the study. All birds were starved and then given 50 ml of glucose solution at 44 d of age. The birds were allocated to individual metabolism cages in a randomised block design with 8 replicates of each of the 4 dietary treatments. 3. Chickens which had been previously fed on diets supplemented with phytase excreted 32% less energy and 28% less dry matter per kg metabolic body weight (W(075)) from endogenous sources, compared to birds fed the unsupplemented diet. 4. Birds previously given phytase supplemented diets excreted 60% less sodium than those given the control diet, but there was no effect on all other minerals investigated. There was no effect of diet on the excretion of endogenous N, sialic acid or amino acids. 5. The results showed that the effects of feeding chickens on diets with supplementary phytase may continue for a few days after the diets are withdrawn. This suggests that previous exposure to phytase may alter the nutritive value of follow-on diets, which may be a commercially important effect.
V Pirgozliev; T Acamovic; M R Bedford
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British poultry science     Volume:  50     ISSN:  1466-1799     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-11-11     Completed Date:  2010-01-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  598-605     Citation Subset:  IM    
Scottish Agricultural College, Ayr, KA6 5HW, Scotland.
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MeSH Terms
6-Phytase / metabolism*
Amino Acids / analysis,  metabolism
Body Weight / physiology
Chickens / metabolism*
Energy Metabolism / physiology*
Feces / chemistry
Minerals / analysis,  metabolism
Nitrogen / analysis,  metabolism
Random Allocation
Reg. No./Substance:
0/Amino Acids; 0/Minerals; 7727-37-9/Nitrogen; EC

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