The use of exogenous xylanase and dietary fibre for modern broiler chicken production
Dimitrova, K. (2021) The use of exogenous xylanase and dietary fibre for modern broiler chicken production. Other thesis, Harper Adams University.
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Abstract
Xylanase is extensively used as an exogenous enzyme in poultry diets due to its ability to reduce digesta viscosity, increase energy and nutrient availability and promote beneficial caecal fermentation through the generation of prebiotic xylooligosaccharides (XOS). Based on the premise that released XOS from feed ingredients may be more important for gut health and bird performance than the removal of antinutritional factors alone by xylanase, the objective of this thesis was to evaluate the best strategy for using xylanase for broiler chicken production. Parameters assessed included: growth performance, nutrient availability, metabolisable energy, gastrointestinal tract development and caecal short-chain fatty acids (SCFAs) concentration in Ross 308 male broiler chickens. In low fibre diets (wheat-maze based), both xylanase and SIGNIS® fed at commercially recommended levels provide beneficial effects through better utilisation of nutrients and increased metabolisable energy. However, this may not directly translate to improved bird growth performance. Changes in caecal SCFAs concentration may be indicative of the prebiotic effect on the microflora associated with XOS generated through xylanase supplementation or as supplied in SIGNIS®. Further research on the impact of dietary fibre on digesta transit time, endogenous enzyme activity and nutrient utilisation might better elucidate the mode of action of dietary fibres for improving gut health in poultry.
| Item Type: | Thesis (Other) |
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| Divisions: | Veterinary Health and Animal Sciences (from 1.08.20 to 31.08.21) |
| Depositing User: | Ms Kath Osborn |
| Date Deposited: | 19 Nov 2021 13:46 |
| Last Modified: | 19 Nov 2021 13:46 |
| URI: | https://hau.repository.guildhe.ac.uk/id/eprint/17773 |
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