Table 6.
Effects of Mn-MHAC on Mn-SOD and Cu/Zn-SOD activities in the serum and heat.1
| Item | Dietary treatment |
SEM | P-value | Polynomial contrasts, P-value |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Control (0 mg Mn/kg) | Mn sulfate (100 mg Mn/kg) | Mn-MHAC (25 mg Mn/kg) | Mn-MHAC (50 mg Mn/kg) | Mn-MHAC (75 mg Mn/kg) | Mn-MHAC (100 mg Mn/kg) | Mn-MHAC linear | Mn-MHAC quadratic | |||
| Serum | ||||||||||
| Mn-SOD2, U/mL | 134.51a | 91.95b | 83.45bc | 65.74cd | 58.93d | 66.12cd | 5.071 | <0.001 | 0.048 | 0.019 |
| Cu/Zn-SOD, U/mL | 73.58 | 59.78 | 74.04 | 81.99 | 89.47 | 96.92 | 6.777 | 0.724 | 0.315 | 0.610 |
| Heart | ||||||||||
| Mn-SOD, U/mL | 155.18 | 151.35 | 160.34 | 169.80 | 194.54 | 160.54 | 8.011 | 0.698 | 0.441 | 0.561 |
| Cu/Zn-SOD, U/mL | 186.68 | 267.15 | 177.05 | 169.74 | 170.03 | 161.84 | 8.284 | 0.001 | 0.654 | 0.896 |
Mn-MHAC = manganese methionine hydroxy analog chelated; Mn-SOD = Mn superoxide dismutase; Cu/Zn-SOD = copper-zinc superoxide dismutase.
a, b, c, d Values in the same row with different superscript are significantly different (P < 0.05) by one-way ANOVA.
1
Data are means of 6 replicates of 12 broilers per dietary treatment.
2
Serum Mn-SOD Regression equation: y = −1.055x2 - 0.017x + 5.981, R2 = 0.548.