(1993) reported
a similar age associated pattern of enzyme activity
(amylase, trypsin, lipase, chymotrypsin; units/kg
BW) was observed through the first 15 d post hatch although
amylase activity peaked at 10 d. Noy and Sklan
(1995) observed greater than 85% starch digestibility
by 4 d posthatch and Reisenfeld et al. (1980) reported
greater than 95% digestibility by 12 d so it appears that
at very young ages, there is sufficient amylase to facilitate
near maximal starch utilization. When enzyme
activity was expressed per unit of pancreas weight, however,
there was a lag phase through 5 to 8 d posthatch
for trypsin, lipase, and chymotrypsin activity followed
by a sharp linear increase. In turkey poults, the lag
phase was slightly longer (14 d) followed by the same
linear increase in digestive enzyme activity although lipase
activity was somewhat influenced by diet (Krogdahl
and Sell, 1989).
(1993) reporteda similar age associated pattern of enzyme activity(amylase, trypsin, lipase, chymotrypsin; units/kgBW) was observed through the first 15 d post hatch althoughamylase activity peaked at 10 d. Noy and Sklan(1995) observed greater than 85% starch digestibilityby 4 d posthatch and Reisenfeld et al. (1980) reportedgreater than 95% digestibility by 12 d so it appears thatat very young ages, there is sufficient amylase to facilitatenear maximal starch utilization. When enzymeactivity was expressed per unit of pancreas weight, however,there was a lag phase through 5 to 8 d posthatchfor trypsin, lipase, and chymotrypsin activity followedby a sharp linear increase. In turkey poults, the lagphase was slightly longer (14 d) followed by the samelinear increase in digestive enzyme activity although lipaseactivity was somewhat influenced by diet (Krogdahland Sell, 1989).
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