Table 4.
Effects of dietary marine-derived polysaccharides (MDP) on serum antioxidant capacity in late-phase laying hens.
| Items1 | Dietary MDP levels (mg/kg) |
SEM2 |
P-value |
||||
|---|---|---|---|---|---|---|---|
| 0 | 1,000 | 2,500 | 5,000 | Linear | Quadratic | ||
| 3 wk | |||||||
| T-SOD, U/mL | 499.59 | 556.19 | 504.79 | 510.84 | 59.26 | 0.949 | 0.685 |
| GSH-Px, U/0.1 mL | 1253.51 | 1094.74 | 1523.68 | 1121.05 | 149.27 | 0.964 | 0.445 |
| CAT, U/mL | 5.79 | 3.76 | 4.02 | 3.46 | 1.19 | 0.253 | 0.561 |
| MDA, nmol/mL | 12.00a | 6.89b | 7.34b | 8.05b | 0.95 | 0.035 | 0.023 |
| 6 wk | |||||||
| T-SOD, U/mL | 393.53a | 491.06b | 493.87b | 469.75a,b | 25.59 | 0.080 | 0.045 |
| GSH-Px, U/0.1 mL | 1108.77 | 1333.35 | 1223.68 | 1212.28 | 97.17 | 0.816 | 0.270 |
| CAT, U/mL | 1.13 | 1.30 | 1.52 | 2.40 | 0.82 | 0.310 | 0.679 |
| MDA, nmol/mL | 8.67 | 5.11 | 5.88 | 7.33 | 1.10 | 0.538 | 0.064 |
a,bMeans in the same row with different letters are significantly different at P < 0.05.
1
T-SOD, total superoxide dismutase; GSH-Px, glutathione peroxidase; CAT, catalase; MDA, malondialdehyde.
2
SEM, standard error of mean.