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Title: Dietary analysis of barley crop for animal feed supplementation in poultry farming
Author: Abeke, Egega
ISNI:       0000 0004 6348 2887
Awarding Body: University of Sunderland
Current Institution: University of Sunderland
Date of Award: 2017
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Barley contains dietary fibres such as beta-glucan, which are not easily hydrolysable by the avian gastrointestinal enzymes but are linked to possible prebiotic properties. Prebiotics are non-digestible food ingredients that selectively encourage the growth of beneficial (probiotic) bacteria in the animal gut. A major advantage of prebiotics is their potential to compensate for the reduction in prophylactic antibiotic use. It is suggested that incorporating prebiotics into animal feed as supplements can modulate animal guts towards ensuring greater immunity against pathogens. The source and physicochemical condition of a prebiotic is key to its functionality. In the case of cereals, location on the grain and extraction method of prebiotics plays a vital role on its viability. Eight varieties of barley were investigated in this study, with grains separated into nine fractions, FR1 - FR9, by pearling, and each fraction analysed for its biochemistry and how it affects the growth of a probiotic bacterium - Lactobacillus acidophilus in a simulated poultry gut. Results showed an increase of beta-glucan from FR1 to FR9. The reverse was the case for protein. FR6 - FR8, supported the highest growth of L. acidophilus, with high amounts of beta-glucan. Multiple regression analysis, showed a strong correlation between bacterial growth patterns observed and beta-glucan in FR1 - FR8. However, FR9 with a high betaglucan content, supported a relatively low amount of bacterial growth, which was attributed to the presence of unavailable nutrients in this fraction. This research contributes information on the precise distribution of potentially prebiotic substances in eight barley varieties, with FR6 - FR9 standing out. This could form the basis for further research on the prebiotic property of barley in terms of prebiotic structure and mode of action, for use in poultry feed supplementation.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Chemistry