Document Detail

Influence of whole wheat and xylanase on broiler performance and microbial composition and activity in the digestive tract.
MedLine Citation:
PMID:  15206619     Owner:  NLM     Status:  MEDLINE    
An experiment was carried out to study the effect of different forms of wheat (airtight silo stored whole wheat, conventionally stored whole wheat, and ground wheat included in pellets) and dietary xylanase addition on production results and gastrointestinal characteristics of broiler chickens. Ileal viscosity, pancreatic digestive enzyme activities, and the composition and activity of the intestinal microflora were considered as response parameters. Differences between the 2 types of whole wheat with respect to the various measured parameters were marginal, whereas distinct differences were found between pellet-fed birds and birds receiving whole wheat. Whole wheat feeding improved feed conversion ratio and reduced water consumption (P < 0.001). Compared with pellets, whole wheat increased the relative weight of pancreas and gizzard and the dry matter concentration of gizzard content (P < 0.001). Whole wheat feeding reduced the pH in the gizzard contents (P < 0.01) and increased ileal viscosity. The addition of xylanase reduced ileal viscosity in birds receiving whole wheat to the same level as in pellet-fed birds. Whole wheat feeding resulted in lower activities of amylase in pancreatic tissue (P = 0.054), whereas xylanase addition increased chymotrypsin (P = 0.030) and lipase activities (P = 0.052). Whole wheat feeding resulted in lower intestinal numbers of lactose-negative enterobacteria (P < 0.05) and tended to reduce the ileal and cecal numbers of Clostridium perfringens (P < or = 0.08). It is concluded that whole wheat feeding stimulates gizzard function, which in turn prevents potentially pathogenic bacteria from entering the intestinal tract.
R M Engberg; M S Hedemann; S Steenfeldt; B B Jensen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Poultry science     Volume:  83     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-06-21     Completed Date:  2004-07-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  925-38     Citation Subset:  IM    
Department of Animal Nutrition and Physiology, Danish Institute of Agricultural Sciences, Research Centre Foulum, PO Box 50, DK-8830 Tjele, Denmark.
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MeSH Terms
Amylases / metabolism
Chickens / microbiology*,  physiology*
Chymotrypsin / metabolism
Clostridium perfringens / growth & development
Colony Count, Microbial
Digestive System / microbiology*
Enterobacteriaceae / growth & development
Gizzard / anatomy & histology,  physiology
Hydrogen-Ion Concentration
Intestines / anatomy & histology,  microbiology
Lipase / metabolism
Organ Size
Pancreas / anatomy & histology,  enzymology
Xylosidases / administration & dosage*
Reg. No./Substance:
EC; EC 3.2.1.-/Amylases; EC 3.2.1.-/Xylosidases; EC

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

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