Document Detail


Enzyme supplementation of dry and wet wheat-based feeds for broiler chickens: performance and gut responses.
MedLine Citation:
PMID:  10967608     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To test whether the improvements in digestive efficiency due to either wetting of the food or inclusion of enzymes are accompanied by the same changes in gut function, foods with a high content of wheat were fed to broiler chicks from 1-42 d old. Twenty-four birds were caged individually while a further sixty-four were in group pens in experiments of 2 x 2 factorial design with two levels of enzyme (0 or 1 g/kg, designed for wheat) and two levels of water addition (0 and 1300 g/kg). Food intake and live-weight gain were significantly increased by wet feeding (from 89.3 to 153.4 g/d and from 39.7 to 65.4 g/d respectively), the differences increasing with age, while the enzyme had no significant effect (120.5 and 122.2 g/d and 51.9 and 53.1g/week respectively). The viscosity of digesta was greatly reduced both by wetting (from 4.40 to 2.64 kPa. s) and enzyme (from 4.47 to 2.57 kPa. s) but there was a significant interaction with age in which the viscosity was low throughout in the wet only, enzyme only and wet + enzyme treatments but declined with age from a very high level in the dry, no enzyme treatment (11.5 kPa. s at 14 d). While wetting increased weight and length of digestive tract and thickness of some parts of the gut, enzyme had no significant effect, tending to reduce gut wall thickness. Crypt cell proliferation rate (CCPR) was significantly reduced by wet feeding (from 39.4 to 28.7 cells/crypt per 2 h) and by enzyme supplementation (from 38.9 to 29.2 cells/crypt per 2 h). Therefore, while both wetting and enzyme addition to the food reduced digesta viscosity and CCPR to a similar extent, the former had marked stimulatory effects on food intake and weight gain while the latter had little effect. The mode of action of wet feeding is therefore deduced to be not primarily through its effects on viscosity and CCPR.
Authors:
S Yasar; J M Forbes
Related Documents :
16349238 - Effects of temperature, sulfide, and food abundance on growth and feeding of anaerobic ...
7233078 - 'partial' sham feeding releases gastrin in normal human subjects.
813328 - Configurational changes in helical microtubule frameworks in feeding tentacles of the s...
12035968 - Complementary feeding patterns in pondok labu, south jakarta, indonesia.
24194358 - Food deprivation and refeeding in atlantic salmon,salmo salar: effects on brain and liv...
18465148 - Competition, predation and flow rate as mediators of direct and indirect effects in a s...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The British journal of nutrition     Volume:  84     ISSN:  0007-1145     ISO Abbreviation:  Br. J. Nutr.     Publication Date:  2000 Sep 
Date Detail:
Created Date:  2000-10-24     Completed Date:  2000-10-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372547     Medline TA:  Br J Nutr     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  297-307     Citation Subset:  IM    
Affiliation:
Centre for Animal Sciences, Leeds Institute of Biotechnology and Agriculture, University of Leeds, Leeds, LS2 9JT, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animal Feed*
Animals
Chickens / physiology*
Dietary Supplements*
Drinking
Eating
Enzymes / administration & dosage*
Intestines / physiology*
Organ Size
Viscosity
Weight Gain
Chemical
Reg. No./Substance:
0/Enzymes

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


Previous Document:  Raised saturated-fat intake worsens vascular function in virgin and pregnant offspring of streptozot...
Next Document:  Effects of milk diets containing beef tallow or coconut oil on the fatty acid metabolism of liver sl...