Table 4.
Effect of zinc type on tibia length, width, weight and strength of broilers.
| Control | M-Zn 1 | Nano-ZnO 1 | M-Nano-ZnO 1 | SEM 2 | p Value | |
|---|---|---|---|---|---|---|
| Day 21 | ||||||
| Tibia length (mm) | 72.3 b | 73.5 a | 72.6 b | 74.0 a | 0.31 | <0.001 |
| Tibia weight (g) | 7.18 c | 7.77 a | 7.33 b,c | 7.58 a,b | 0.12 | 0.004 |
| Tibia width (mm) | 5.46 b | 5.74 a | 5.45 b | 5.60 a,b | 0.06 | 0.001 |
| Tibia strength (N) | 181.6 b | 197.7 a | 178.5 b | 188.2 a,b | 3.77 | 0.001 |
| Day 35 | ||||||
| Tibia length (mm) | 98.3 c | 99.1 b,c | 100.5 a | 99.4 a,b | 0.43 | 0.001 |
| Tibia weight (g) | 17.79 | 17.73 | 18.15 | 18.12 | 0.2 | 0.365 |
| Tibia width (mm) | 7.44 | 7.47 | 7.47 | 7.48 | 0.06 | 0.992 |
| Tibia strength (N) | 284.2 | 282.1 | 298 | 285.2 | 5.01 | 0.084 |
1 M-Zn = methionine-Zinc chelate; Nano-ZnO = nano zinc oxide; M-Nano-ZnO = methionine coated nano zinc oxide; 2 SEM = standard error of the mean. Superscript letters denote significant differences within rows.