Lactose was identified in digesta up to SI2, but disappeared in digesta from SI3 and the ileum. There was no difference in the digestibility of β-glucan among diets up to SI3, whereas the digestibility in ileum was significantly higher in diets without lactose compared with diets containing lactose. With all diets, β-glucan was virtually completely digested in the cecum. No difference was found in the concentration of organic acids between diets either in SI3, ileum or cecum.
In conclusion slowly digestible lactose was the most likely cause of the reduced digestibility of β-glucan in oat diets containing lactose.
KE Bach Knudsen, 2010. Journal of Animal Science, 88, E-Suppl. 2:496.