Skip to main content

Advertisement

Table 5 Effects of dietary threonine levels on activities of tryspin, chymotrypsin, alpha-amylase and lipase in intestine of sub-adult grass carpd

From: Growth, digestive and absorptive capacity and antioxidant status in intestine and hepatopancreas of sub-adult grass carp Ctenopharyngodonidella fed graded levels of dietary threonine

Item Dietary Thr levels, g/kg diet
  3.3 5.9 8.4 10.9 13.1 15.8
Trypsin, U/g protein 177.2 ± 10.2a 239.9 ± 12.5b 252.6 ± 12.1b 291.2 ± 16.8c 286.1 ± 10.0c 294.0 ± 10.6c
Chymotrypsin, U/g protein 1.03 ± 0.09a 1.00 ± 0.08a 2.29 ± 0.15c 1.58 ± 0.14b 1.45 ± 0.14b 1.48 ± 0.12b
alpha-amylase, U /mg protein 2.46 ± 0.12a 2.51 ± 0.19a 2.84 ± 0.09b 2.75 ± 0.06b 2.73 ± 0.04b 2.77 ± 0.04b
Lipase, U/g protein 19.11 ± 1.29ab 20.97 ± 1.77bc 22.71 ± 2.00c 22.55 ± 2.41c 21.06 ± 2.34bc 17.93 ± 1.26a
  1. a,b,cMeans in the same row without a letter in common are significantly different (P< 0.05)
  2. dValues are mean ± SD (n = 6)