Table 8.
Effect of different inorganic sodium sources and increasing level of phytase supplementation on bone breaking strength and bone (tibia) ash.1
| Treatment | Bone breaking strength, kgF | Bone ash, % | |
|---|---|---|---|
| Positive control (PC) | 29.68 | 52.59 | |
| Sodium source | Phytase | ||
| NaCl | 26.25 | 51.53 | |
| NaCl + NaHCO3 | 26.63 | 51.53 | |
| 0 | 18.22 | 49.11 | |
| 500 | 27.93 | 51.68 | |
| 1,000 | 30.44 | 52.62 | |
| 2,000 | 29.18 | 52.73 | |
| NaCl | 0 | 19.35 | 48.95 |
| NaCl | 500 | 28.03 | 51.70 |
| NaCl | 1,000 | 28.88 | 52.07 |
| NaCl | 2,000 | 28.75 | 53.42 |
| NaCl + NaHCO3 | 0 | 17.08 | 49.27 |
| NaCl + NaHCO3 | 500 | 27.82 | 51.65 |
| NaCl + NaHCO3 | 1,000 | 32.00 | 53.17 |
| NaCl + NaHCO3 | 2,000 | 29.62 | 52.03 |
| SD2 | 5.322 | 1.730 | |
| Probability | |||
| Contrast | PC vs. 0 Phy3 | 0.006 | 0.001 |
| Trend for main effect | |||
| Linear | Phytase | 0.010 | <0.001 |
| Quadratic | Phytase | 0.021 | 0.120 |
| Sodium | 0.808 | 0.993 | |
| Phytase | <0.001 | <0.001 | |
| Sodium × phytase | 0.663 | 0.369 | |
1
Means represents 6 tibia bones per replicate cage.
2
Standard deviation.
3
Contrast between the positive control and diets containing 0 FTU phytase/kg diet.