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Assessment of caecal parameters in layer hens fed on diets containing wheat distillers dried grains with solubles

White, Gavin A.; Richards, P. J.; Wu, S.; Mellits, K. H.; Wiseman, J.

Authors

P. J. Richards

S. Wu

J. Wiseman



Abstract

There is much interest in quantifying the nutritional value of UK wheat distillers dried grains with solubles (W-DDGS) for livestock species. A study was designed to evaluate caecal parameters (pH, short chain fatty acids (SCFAs) and bacterial diversity) in layer hens fed on balanced diets containing graded concentrations of W-DDGS.
A total of 32 layer hens (Bovans Brown strain at 27 weeks of age) were randomly allocated to one of 4 dietary treatments containing W-DDGS at 0, 60, 120 or 180 g/kg. Each treatment was fed to 8 replicate individually housed layer hens over a 5-d acclimatisation period, followed by a 4-week trial. Individual feed intakes were monitored and all eggs were collected daily for weeks 2, 3 and 4 of the trial, weighed and an assessment of eggshell “dirtiness” made. All hens were culled on d 29 and caecal pH and SCFAs measured. Polymerase chain reaction denaturing gradient gel electrophoresis of the bacterial 16 S rDNA gene was used to assess total bacterial diversity of luminal caecal content from hens fed the 0 and 180 g W-DDGS/kg diets. Unweighted pair group method with arithmetic mean (UPGMA) dendrograms were generated from DGGE banding patterns.
Increasing W-DDGS dietary concentrations resulted in a more acidic caecal environment. Caecal SCFAs were unaffected by diet aside from a quadratic effect for molar proportions of isobutyric acid. Diversity profiles of the bacterial 16S rRNA gene from luminal caecal contents were unaffected by W-DDGS inclusion.
The results of the current study suggest that W-DDGS can be successfully formulated into nutritionally balanced layer diets (supplemented with xylanase and phytase) at up to 180 g/kg with no detrimental effects to the caecal environment.

Citation

White, G. A., Richards, P. J., Wu, S., Mellits, K. H., & Wiseman, J. (2015). Assessment of caecal parameters in layer hens fed on diets containing wheat distillers dried grains with solubles. British Poultry Science, 56(4), 494-502. https://doi.org/10.1080/00071668.2015.1064859

Journal Article Type Article
Acceptance Date May 14, 2015
Online Publication Date Aug 3, 2015
Publication Date Jul 4, 2015
Deposit Date Dec 8, 2016
Publicly Available Date Dec 8, 2016
Journal British Poultry Science
Print ISSN 0007-1668
Electronic ISSN 1466-1799
Publisher Taylor & Francis Open
Peer Reviewed Peer Reviewed
Volume 56
Issue 4
Pages 494-502
DOI https://doi.org/10.1080/00071668.2015.1064859
Public URL http://eprints.nottingham.ac.uk/id/eprint/39219
Publisher URL http://www.tandfonline.com/doi/full/10.1080/00071668.2015.1064859
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf
Additional Information Peer Review Statement: The publishing and review policy for this title is described in its Aims & Scope.; Aim & Scope: http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=cbps20

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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