Table 4.
Effect of super-dosing phytase and day of measurement on serum mineral concentrations of nursery pigs1
| Day 21 | Day 42 | ||||
|---|---|---|---|---|---|
| Phytase, FTU/kg | 0 | 2,500 | 0 | 2,500 | SEM |
| Mineral concentration, mg/L | |||||
| P | 137.6 | 140.4 | 135.6 | 126.9 | 4.12 |
| K | 280.2 | 273.4 | 273.7 | 258.8 | 8.04 |
| Ca | 103.7 | 103.1 | 100.3 | 93.4 | 3.32 |
| Mg | 24.5 | 24.2 | 23.5 | 22.5 | 0.84 |
| Zn2 | 1.25b | 1.45a | 1.30b | 1.23b | 0.05 |
| S | 81.2 | 77.1 | 65.5 | 61.5 | 1.87 |
| Cu3 | 1.9 | 2.2 | 1.8 | 2.0 | 0.07 |
| Fe4 | 1.2 | 0.9 | 1.1 | 0.6 | 0.16 |
abValues within a row with different superscripts differ (P ≤ 0.05).
1Values are least square means of 16 pigs, representing main effects of phytase of a 2 × 3 factorial arrangement with 0 or 2,500 FTU/kg of phytase and 0, 0.15, or 0.30% inositol. The interaction between phytase and inositol was not significant.
2Interaction of phytase × day (P = 0.008).
3Main effect of phytase (P = 0.01).
4Main effect of phytase (P = 0.02).