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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.

Journal Article Type Article
Publication Date Jul 4, 2015
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
APA6 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
DOI https://doi.org/10.1080/00071668.2015.1064859
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.nottingh.../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....cope&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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