Table 4.
Effects of dietary zinc source and level on growth performance of broilers.
| Zn source | Added Zn level (mg/kg) | ADFI (g) | ADG (g) | F/G (g/g) |
|---|---|---|---|---|
| Control1 | 0 | 98.6 | 54.2 | 1.72 |
| ZnSO4.7H2O1 | 60 | 102.0 | 57.2 | 1.69 |
| 120 | 101.8 | 56.9 | 1.69 | |
| 180 | 101.6 | 57.1 | 1.69 | |
| Zn-AA W1 | 60 | 100.5 | 55.3 | 1.73 |
| 120 | 102.5 | 57.3 | 1.69 | |
| 180 | 99.7 | 55.4 | 1.71 | |
| Zn-Pro M1 | 60 | 102.7 | 57.2 | 1.70 |
| 120 | 103.8 | 57.2 | 1.71 | |
| 180 | 103.8 | 57.7 | 1.70 | |
| Zn-Pro S1 | 60 | 102.5 | 55.8 | 1.74 |
| 120 | 102.8 | 56.8 | 1.72 | |
| 180 | 105.8 | 58.6 | 1.71 | |
| Pooled SE | 2.35 | 1.36 | 0.016 | |
| Zn source2 | ZnSO4.7H2O | 101 | 56.4 | 1.70 |
| Zn-AA W | 100 | 55.6 | 1.71 | |
| Zn-Pro M | 102 | 56.6 | 1.71 | |
| Zn-Pro S | 102 | 56.3 | 1.72 | |
| Pooled SE | 1.17 | 0.678 | 0.008 | |
| Zn level | 01 | 98.6a | 54.2a | 1.72 |
| 603 | 101.9b | 56.4b | 1.71 | |
| 1203 | 102.7b | 57.0b | 1.70 | |
| 1803 | 102.7b | 57.2b | 1.70 | |
| Pooled SE | 1.17 | 0.678 | 0.008 | |
| P-value4 | ||||
| Source | 0.538 | 0.732 | 0.230 | |
| Level | 0.043 | 0.008 | 0.384 | |
| Source × level | 0.979 | 0.946 | 0.854 | |
a,bMeans with different superscripts within the same column differ significantly (P < 0.05).
1Each value represents the mean of 6 replicate cages with 6 chicks per cage (n = 6).
2Each value represents the mean of 18 replicate cages with 6 chicks per cage (n = 18).
3Each value represents the mean of 24 replicate cages with 6 chicks per cage (n = 24).
4Probability values for main effects of ANOVA.