Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 418171
Title 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
Author(s) Krimpen, M.M. van; Kwakkel, R.P.; Peet-Schwering, C.M.C. van der; Hartog, L.A. den; Verstegen, M.W.A.
Source British Poultry Science 52 (2011)6. - ISSN 0007-1668 - p. 730 - 741.
Department(s) Livestock Research
LR - Backoffice
Animal Nutrition
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) feather-pecking - japanese quail - nutrient digestibility - titanium-dioxide - wood shavings - performance - fiber - behavior - whole - dilution
Abstract 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.
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