Strategic use of carbohydrase enzymes in broiler diets to increase productivity by improving gut health
Lead Research Organisation:
University of Glasgow
Department Name: College of Medical, Veterinary, Life Sci
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
People |
ORCID iD |
| Oluyinka Olukosi (Primary Supervisor) | |
| Allison Craig (Student) |
Publications
Craig AD
(2019)
The effect of carbohydrases or prebiotic oligosaccharides on growth performance, nutrient utilisation and development of small intestine and immune organs in broilers fed nutrient-adequate diets based on either wheat or barley.
in Journal of the science of food and agriculture
Craig AD
(2020)
Xylanase and xylo- oligosaccharide prebiotic improve the growth performance and concentration of potentially prebiotic oligosaccharides in the ileum of broiler chickens.
in British poultry science
Studentship Projects
| Project Reference | Relationship | Related To | Start | End | Student Name |
|---|---|---|---|---|---|
| BB/M016080/1 | 30/09/2015 | 29/09/2019 | |||
| 1741959 | Studentship | BB/M016080/1 | 30/09/2015 | 29/09/2019 | Allison Craig |
| Description | Significant Achievements Growth Performance- This project has illustrated, thus far, little effect of carbohydrase enzymes or prebiotic oligosaccharides on the growth performance of broilers receiving nutrient adequate diets. There was no significant effect of raising birds on dirty litter or challenging birds with coccidia on growth performance. However, the inclusion of carbohydrase enzymes or prebiotic oligosaccharides significantly improved the growth performance of broilers receiving diets deficient in energy and protein. Nutrient Utilisation- The studies so far have shown that nitrogen and energy digestibility were improved following the use of carbohydrase enzymes or prebiotic oligosaccharides in diets adequate in nutrients and diets deficient in energy and protein. However, there was no significant effect of raising birds on dirty litter or challenging birds with coccidia on nutrient utilisation. Indices of Immune Function- The use of carbohydrase enzymes or prebiotic oligosaccharides have been shown to improve indices of immune function including bursa of fabricius weight and short chain fatty acid (SCFA) concentration in the caecum. In addition to this, carbohydrase enzymes significantly increased the disappearance of specific NSP hydrolysis products in the ileum of broilers which could be associated with the production of in-situ prebiotic oligosaccharides. The expression of genes related to immune function in the caecal tonsil, such as IL1ß and TLR21, were upregulated following carbohydrase or XOS supplementation which could suggest that additives such as carbohydrase or XOS beneficially affect immune function. Caecal Microflora- Challenging birds with coccidia affected the %G+C profile of the micro-organisms in the caeca. The left hand side of the %G+C graph is associated with potential pathogens and poor growth performance, the middle of the graph is associated with commensal bacteria and optimal growth performance and the right hand side of the graph is associated with beneficial bacteria. In general, the graph shifted towards the left hand side following coccidia challenge. Supplementing broiler diet with carbohydrase enzymes or XOS also significantly affected the %G+C profile. In general the graph shifted towards the right hand side and resembled that of birds in the non-challenged group. This suggests that additives such as carbohydrases or XOS may alleviate the impact of coccidiosis on the population of caecal microflora. |
| Exploitation Route | Yes the project shows that more research is required into identifying small oligosacchardies within gut contents. This could help to identify which molecules should be used a synthetic prebiotics for poultry. |
| Sectors | Agriculture Food and Drink Education Healthcare |