Table 4.
Growth performance of broilers fed complete corn–soybean meal based or complete diets substituted with 40% corn supplemented with α-amylase from 15 to 25 d of age.
| Diets | Α-Amylase, KNU1/kg | FI2 (g) | BW3 (g) | FCR4 (g) |
|---|---|---|---|---|
| Effect of interaction | ||||
| Corn and soybean meal diet | 0 | 1,115 | 740 | 1.509 |
| 40 | 1,074 | 710 | 1.515 | |
| 80 | 1,117 | 738 | 1.516 | |
| 120 | 1,075 | 713 | 1.509 | |
| 160 | 1,103 | 754 | 1.464 | |
| Corn-based | 0 | 1,072 | 579 | 1.860 |
| 40 | 1,157 | 610 | 1.918 | |
| 80 | 1,132 | 590 | 1.933 | |
| 120 | 1,091 | 605 | 1.808 | |
| 160 | 1,094 | 580 | 1.903 | |
| SEM | 7.23 | 9.11 | 0.025 | |
| Effect of diet | ||||
| Corn and soybean meal diet | 1,097 | 731 | 1.503 | |
| Corn-based | 1,109 | 593 | 1.884 | |
| Effect of α-amylase inclusion | ||||
| 0 | 1,094 | 660 | 1.685 | |
| 40 | 1,116 | 660 | 1.717 | |
| 80 | 1,125 | 664 | 1.725 | |
| 120 | 1,083 | 659 | 1.659 | |
| 160 | 1,099 | 667 | 1.684 | |
| Probabilities | ||||
| Diet | 0.630 | <0.001 | <0.001 | |
| Amylase | 0.651 | 0.720 | 0.567 | |
| Diet∗Amylase | 0.755 | 0.685 | 0.726 | |
1
Kilo novo α-amylase units.
2
Feed intake.
3
BW gain.
4
Feed conversion ratio.