| dc.description.abstract | Nutritional formula is an economical key factor to raise poultry. β-mannanase breaks the non-starch polysaccharide (NSP) backbone chains in plant-based feed, then NSP is divided into mannose or mannan-oligosaccharide (MOS). Any study about the utilization of MOS or β-mannanase on the ducks was not conducted to our knowledge. This study was performed to evaluate effects of MOS and β-mannanase on the ducks. Effects of MOS supplementation on live performances started to show at d 21.
There were no effects by additional YCW-MOS in intestine length, weight, index, and viscosity. However, YCW-MOS showed its effectiveness on gut morphology and cell formation. YCW-MOS only influenced cysteine, histamine, and tryptophan digestibility. β-mannanase showed its effect on live performance throughout the experiment. β-mannanase showed its effectiveness on organ length, viscosity, and gut morphology and cell formation. β-mannanase not only affected amino acid digestibility, but also affected body and bone composition. Titanium (IV) Oxide was used to test the effect of β-mannanase on digesta passage rate. β-mannanase was found to have a great effect on digesta passage rate. Addition of β-mannanase showed faster digesta passage rate because β-mannanase had influenced viscosity and pH of digestive tracts. In conclusion, the β-mannanase influence proved to be more effective than MOS to ducks. This result seems to be due to the fact that MOS is a derivative of β-mannanase. Therefore, the addition of β-mannanase can be an important factor that duck producers must take into account if they want to earn better profit. | en |
