The effects of chitosan supplementation on the activities of pepsin,amylase,
and lipase are shown in Table 4.
No significant difference was found for the activities of pepsin and amylase in the distal jejunum digesta
among the five groups on days 14 and 28.
Chitosan supplementation had no effect on the activity of amylase in proximal jejunum on day 14,
however,
on day 28,
a quadratic increase tendency (P =0.062) was observed with increasing chitosan supplementation.
The lipase activity of proximal jejunum contents was not affected by increasing chitosan supplementation on days 14 and 28.
Dietary chitosan linearly decreased the lipase activity of distal jejunum compared with the control on days 14 (P < 0.01) and 28 (P < 0.05).