Table.4.
Effect of dietary calcium (Ca) level on serum parameters and tibia ALP activities of broilers on d 211
| Analyzed dietary Ca level, % | Serum Ca content, mg/100 mL | Serum inorganic P, mg/100 mL | Serum Ca:inorganic P ratio | Serum ALP Activity, King unit/100 mL | Tibia ALP Activity, King unit/g prot |
|---|---|---|---|---|---|
| 0.59 | 8.63 | 6.22 | 1.39 | 312cd | 384a |
| 0.70 | 8.65 | 7.09 | 1.23 | 380bc | 350ab |
| 0.80 | 8.21 | 6.78 | 1.22 | 304cd | 271c |
| 0.88 | 8.50 | 7.14 | 1.19 | 345bcd | 305bc |
| 0.98 | 8.95 | 6.92 | 1.30 | 294d | 340ab |
| 1.09 | 8.63 | 6.81 | 1.27 | 396b | 348ab |
| 1.18 | 8.76 | 6.36 | 1.39 | 486a | 355ab |
| SEM | 0.553 | 0.534 | 0.133 | 51.9 | 57.1 |
| P-value | |||||
| Ca level | 0.43 | 0.06 | 0.08 | < 0.0001 | 0.04 |
| Linear | – | – | – | 0.0003 | 0.82 |
| Quadratic | – | – | – | 0.002 | 0.005 |
1Data represented the means of 6 replicates (n = 6)
2Abbreviation: ALP alkaline phosphatase
a-dMeans within a column with unlike superscript letters were significantly different (P < 0.05)