Table 4. Effect of CSM level with or without enzyme blend on FI, WG, and FCR of broilers
| Treatments | 1–10 days | 1–24 days | 1–35 days |
| CSM level | Enzyme (mg/kg) | FI (g/bird) | WG (g) | FCR | FI (g/bird) | WG (g) | FCR | FI (g/bird) | WG (g) | FCR |
| Control | 0 | 345.3a | 323.7b | 1.08 | 1,769.9 | 1,438.4 | 1.25 | 3,547.0 | 2,589.5 | 1.37 |
| 100 | 367.8a | 342.9a | 1.07 | 1,754.7 | 1,472.6 | 1.20 | 3,485.2 | 2,614.0 | 1.35 |
| Low1) | 0 | 350.2b | 332.9ab | 1.05 | 1,786.8 | 1,450.4 | 1.22 | 3,484.6 | 2,557.2 | 1.36 |
| 100 | 346.5b | 338.7a | 1.02 | 1,798.4 | 1,525.8 | 1.19 | 3,491.8 | 2,609.5 | 1.34 |
| Medium2) | 0 | 347.1b | 333.1ab | 1.04 | 1,771.9 | 1,454.1 | 1.23 | 3,516.1 | 2,577.8 | 1.36 |
| 100 | 354.0ab | 342.4a | 1.03 | 1,750.4 | 1,493.0 | 1.21 | 3,539.0 | 2,656.4 | 1.33 |
| High3) | 0 | 357.7ab | 341.6a | 1.05 | 1,800.5 | 1,493.5 | 1.97 | 3,498.9 | 2,573.2 | 1.36 |
| 100 | 345.8b | 332.0ab | 1.04 | 1,768.6 | 1,498.0 | 1.20 | 3,449.3 | 2,660.7 | 1.31 |
| SEM | | 2.15 | 1.80 | 0.01 | 9.71 | 9.11 | 0.01 | 13.90 | 19.60 | 0.01 |
| Main effects | | | | | | | | | | |
| CSM levels | | | | | | | | | | |
| Control | | 356.6 | 333.3 | 1.08a | 1,784.5 | 1,455.5 | 1.22a | 3,516.1 | 2,601.7 | 1.361 |
| Low | | 348.3 | 335.8 | 1.04b | 1,762.3 | 1,488.1 | 1.20ab | 3,488.2 | 2,583.4 | 1.352 |
| Medium | | 350.6 | 337.8 | 1.04b | 1,792.6 | 1,473.5 | 1.22ab | 3,527.6 | 2,617.1 | 1.349 |
| High | | 351.8 | 336.8 | 1.04ab | 1,761.1 | 1,495.8 | 1.20b | 3,474.1 | 2,617.0 | 1.361 |
| Enzyme (mg/kg) | | | | | | | | | | |
| 0 | 350.1 | 332.8 | 1.06 | 1,782.3 | 1,450.4b | 1.22 | 3,511.6 | 2,574.4b | 1.364a |
| 100 | 353.5 | 339.0 | 1.04 | 1,768.0 | 1,525.8a | 1.20 | 3,491.3 | 2,635.1a | 1.334b |
| Significance | | | | | | | | | | |
| CSM | | 0.537 | 0.802 | 0.023 | 0.613 | 0.402 | 0.045 | 0.787 | 0.806 | 0.527 |
| Enzyme | | 0.400 | 0.072 | 0.215 | 0.486 | 0.037 | 0.008 | 0.627 | 0.036 | 0.017 |
| CSM × Enzyme | | 0.028 | 0.028 | 0.036 | 0.801 | 0.890 | 0.573 | 0.130 | 0.859 | 0.855 |
Values are means of 6 replicates (10 birds per replicate).
Means with different superscripts within the columns are different (p < 0.05).
CSM low level: 4%, 8%, and 12% of complete diet introduced in the starter, grower, and finisher period respectively.
CSM medium level: 5%, 10%, and 15% of complete diet introduced in the starter, grower, and finisher period, respectively.
CSM high level: 6%, 12%, and 18% of complete diet introduced in starter, grower, and finisher phases of growth, respectively.
CSM, cottonseed meal; FI, feed intake; WG, weight gain; FCR, feed conversion ratio; SEM, standard error of means.