Table 5.
Digestive enzymes activities in the intestine of the on-growing grass carp (Ctenopharyngodon idella) fed diets containing graded levels of vitamin D3 for 10 weeks (U/g tissue)1.
| Item | VD3 level, IU/kg diet |
P-value | |||||
|---|---|---|---|---|---|---|---|
| 15.2 (control) | 364.3 | 782.5 | 1,167.9 | 1,573.8 | 1,980.1 | ||
| Trypsin | 0.82 ± 0.08a | 0.98 ± 0.09b | 1.25 ± 0.11c | 1.22 ± 0.13c | 1.20 ± 0.09c | 1.02 ± 0.13c | <0.001 |
| Chymotrypsin | 9.07 ± 0.77a | 9.13 ± 0.74a | 10.61 ± 0.82b | 12.02 ± 1.32c | 11.99 ± 1.09b | 11.39 ± 0.83b | <0.001 |
| Amylase | 1,009.12 ± 86.67a | 1,180.49 ± 66.10bc | 1,245.55 ± 75.92c | 1,293.35 ± 139.44c | 1,164.97 ± 127.77bc | 1,091.18 ± 102.44ab | 0.001 |
a-c Mean values within a row with different superscript letters indicate significant difference (one-way ANOVA and Duncan's multiple-range tests, P < 0.05).
1
Values are means ± SD (n = 6).