Document Detail


Effects of dietary energy concentration, nonstarch polysaccharide concentration, and particle sizes of nonstarch polysaccharides on digesta mean retention time and gut development in laying hens.
MedLine Citation:
PMID:  22221239     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
1. From an experiment with 504 laying hens (ISA Brown strain, 18-40 weeks of age), 90 40-week old hens were used for determining digesta mean retention time (MRT) and gut weight development. This experiment comprised 6 dietary treatments according to a 2 × 3 factorial design. Factors were dietary apparent metabolisable energy (AME) concentration (11·8 vs 10·6 MJ/kg), insoluble nonstarch polysaccharides (NSP) concentration (65 vs 134 g/kg), and fine vs coarse particle sizes of added NSP. Titanium recovery in different gut segments was used as an indicator of MRT. 2. Increasing NSP concentration prolonged MRT in the crop (68 vs 34 min) and total foregut (91 vs 57 min) compared with control NSP. Reducing energy concentration prolonged MRT in the colon (26 vs 7 min), and total hind gut (30 vs 9 min), compared with control energy. Overall MRT was not affected by dietary treatments. 3. Increasing NSP concentration increased relative weights of the empty proventriculus-gizzard and its contents by 30% (25·2 vs 19·4 g/kg) and 18% (15·4 vs 13·0 g/kg), respectively, compared with control NSP diets. 4. MRT in the foregut was prolonged as daily insoluble NSP intake increased, and this was more pronounced in hens given coarsely ground NSP, compared with finely ground. A prolonged MRT in the foregut seemed to indicate a higher level of satiety, which may contribute to a lower feather pecking pressure in laying hens.
Authors:
M M Van Krimpen; R P Kwakkel; C M C Van Der Peet-Schwering; L A Den Hartog; M W A Verstegen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British poultry science     Volume:  52     ISSN:  1466-1799     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2012-01-06     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  730-41     Citation Subset:  IM    
Affiliation:
a Wageningen UR Livestock Research , PO Box 65, NL-8200 AB Lelystad.
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