Table 3.
Age-related changes in serum antioxidant capacity of laying hens.
| Treatments |
|||||
|---|---|---|---|---|---|
| Items | D195 | D340 | D525 | SEM | P-value |
| CAT (U/mL) | 1.41 | 1.56 | 1.33 | 0.064 | 0.321 |
| MDA (nmol/mL) | 3.59b | 3.66b | 4.99a | 0.233 | 0.014 |
| GSH (mg/L) | 6.15 | 4.38 | 4.41 | 0.431 | 0.162 |
| GSH-Px (U/mL) | 234.42a | 196.90ab | 178.66b | 7.688 | 0.005 |
| SOD (U/mL) | 253.55 | 260.00 | 244.15 | 6.012 | 0.578 |
| T-AOC (U/mL) | 2.22 | 1.72 | 1.70 | 0.102 | 0.055 |
Abbreviations: CAT, catalase; D195, 195-day-old laying hens; D340, 340-day-old laying hens; D525, 525-day-old laying hens; GSH, glutathione; GSH-Px, glutathione peroxidase; MDA, malondialdehyde; SOD, superoxide dismutase; T-AOC, total antioxidant capacity.
ab
Mean values within a row with different superscripts letters are significantly different at P < 0.05.