Table 3.
Effect of sodium source and phytase supplementation on the performance of 21-day-old broilers1.
| Average BW, g |
Average BW gain, g |
Feed intake/bird, g |
Feed efficiency, g/kg |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Treatment | D 0 | D 14 | D 21 | D 0–14 | D 14–21 | D 0–21 | D 0–14 | D 14–21 | D 0–21 | D 0–14 | D 14–21 | D 0–21 | |
| Positive control (PC) | 43.2 | 441.5 | 994 | 402.7 | 598.2 | 947.7 | 506.0 | 688.5 | 1,188.2 | 795.5 | 873.0 | 798.3 | |
| Sodium | Phytase | ||||||||||||
| NaCl | 43.3 | 411.6 | 946.7 | 370.4 | 573.1 | 894.5 | 478.0 | 667.3 | 1,141.2 | 775.0 | 858.4 | 783.1 | |
| NaCl + NaHCO3 | 43.2 | 414.9 | 959.7 | 371.5 | 588.0 | 916.3 | 480.7 | 684.2 | 1,164.6 | 772.5 | 861.5 | 786.6 | |
| 0 | 43.3 | 386.4 | 899.6 | 343.3 | 553.2 | 850.3 | 462.3 | 653.3 | 1,112.8 | 741.0 | 847.3 | 763.9 | |
| 500 | 43.3 | 419.9 | 965.1 | 378.8 | 585.1 | 919.2 | 476.9 | 680.2 | 1,155.3 | 793.9 | 860.4 | 794.3 | |
| 1,000 | 43.1 | 421.7 | 968.5 | 378.5 | 589.1 | 919.3 | 479.9 | 677.0 | 1,154.3 | 789.9 | 870.2 | 796.4 | |
| 2,000 | 43.3 | 425.0 | 979.6 | 383.3 | 594.9 | 932.8 | 498.3 | 692.4 | 1,189.2 | 770.3 | 862.0 | 784.8 | |
| NaCl | 0 | 43.3 | 391.3 | 900.0 | 348.5 | 545.3 | 844.8 | 465.3 | 649.3 | 1,109.3 | 748.3 | 840.7 | 761.7 |
| NaCl | 500 | 43.2 | 406.2 | 935.2 | 367.5 | 565.7 | 886.5 | 465.8 | 658.3 | 1,121.3 | 787.8 | 859.2 | 789.3 |
| NaCl | 1,000 | 43.2 | 428.0 | 977.8 | 385.0 | 591.0 | 922.8 | 482.8 | 685.5 | 1,163.2 | 799.2 | 861.5 | 793.0 |
| NaCl | 2,000 | 43.5 | 420.8 | 973.7 | 380.7 | 590.3 | 923.8 | 497.8 | 676.0 | 1,171.0 | 764.8 | 872.3 | 788.5 |
| NaCl + NaHCO3 | 0 | 43.2 | 381.5 | 899.2 | 338.2 | 561.0 | 855.8 | 459.2 | 657.3 | 1,116.3 | 733.7 | 853.8 | 766.2 |
| NaCl + NaHCO3 | 500 | 43.3 | 433.7 | 995.0 | 390.2 | 604.5 | 951.8 | 488.0 | 702.0 | 1,189.3 | 800.0 | 861.7 | 799.2 |
| NaCl + NaHCO3 | 1,000 | 43.0 | 415.3 | 959.2 | 372.0 | 587.2 | 915.8 | 477.0 | 668.5 | 1,145.3 | 780.7 | 878.8 | 799.8 |
| NaCl + NaHCO3 | 2,000 | 43.2 | 429.2 | 985.5 | 385.8 | 599.5 | 941.8 | 498.7 | 708.8 | 1,207.3 | 775.8 | 851.7 | 781.2 |
| SD2 | 2.78 | 39.01 | 65.00 | 36.76 | 38.34 | 66.10 | 24.00 | 40.04 | 51.96 | 64.77 | 43.73 | 784.85 | |
| Probability | |||||||||||||
| Contrast | PC vs. 0 Phy3 | 0.005 | 0.004 | 0.001 | 0.017 | 0.003 | <0.001 | 0.099 | 0.006 | 0.071 | 0.274 | 0.057 | |
| Trend for main effect | |||||||||||||
| Linear | Phytase | - | 0.007 | 0.019 | 0.014 | 0.007 | <0.001 | - | 0.002 | - | - | - | |
| Quadratic | Phytase | - | 0.068 | 0.078 | 0.121 | 0.072 | 0.819 | - | 0.525 | - | - | - | |
| Sodium | 0.877 | 0.769 | 0.491 | 0.916 | 0.184 | 0.259 | 0.694 | 0.152 | 0.127 | 0.894 | 0.808 | 0.744 | |
| Phytase | 0.997 | 0.069 | 0.019 | 0.039 | 0.049 | 0.017 | 0.008 | 0.130 | 0.010 | 0.189 | 0.641 | 0.131 | |
| Sodium × phytase | 0.997 | 0.568 | 0.500 | 0.619 | 0.587 | 0.586 | 0.437 | 0.265 | 0.222 | 0.902 | 0.716 | 0.943 | |
1
Means represents 6 replicate cages.
2
Standard deviation.
3
Contrast between the positive control and diets containing 0 FTU phytase/kg diet.