Table 2. Broiler growth performance during the starter (1 to14d), grower (15to 28d) and finisher (29–42d) growth periods and for the entire experiment.
| Factors | BWG Gain (g/bird)1 | Feed Intake (g/bird)1 | Feed Conversion Ratio (g FI/g BWG)1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Starter | Grower | Finisher | Overall | Starter | Grower | Finisher | Overall | Starter | Grower | Finisher | Overall | |
| Diet type (D)2 | ||||||||||||
| A | 384.0 | 895.3 | 1167.9 | 2447.2 | 561.6 | 1384.0 | 2134.6 | 4080.2 | 1.47 | 1.55B | 1.83 | 1.68B |
| B | 386.9 | 892.6 | 1152.4 | 2431.9 | 563.7 | 1439.3 | 2172.1 | 4175.1 | 1.46 | 1.61AB | 1.89 | 1.72AB |
| C | 384.1 | 874.5 | 1125.0 | 2383.6 | 578.2 | 1420.5 | 2151.6 | 4150.3 | 1.51 | 1.62A | 1.91 | 1.74A |
| Phytogenic (Ph)3 | ||||||||||||
| No | 381.4 | 876.9 | 1152.2 | 2410.4 | 582.5 | 1417.4 | 2156.4 | 4156.4 | 1.53 | 1.62 | 1.88 | 1.73 |
| Yes | 388.7 | 898.1 | 1144.7 | 2431.4 | 553.1 | 1411.8 | 2149.2 | 4114.1 | 1.43 | 1.57 | 1.88 | 1.69 |
| Interactions (treatments) | ||||||||||||
| A | 374.8 | 868.9 | 1167.1 | 2410.8 | 576.3 | 1367.6 | 2109.6 | 4053.5 | 1.54 | 1.57 | 1.81 | 1.68 |
| APh | 393.2 | 921.7 | 1168.7 | 2483.6 | 546.8 | 1400.3 | 2159.7 | 4106.8 | 1.40 | 1.52 | 1.85 | 1.65 |
| B | 387.6 | 885.2 | 1147.6 | 2420.4 | 578.5 | 1438.3 | 2176.7 | 4193.6 | 1.49 | 1.63 | 1.90 | 1.74 |
| BPh | 386.2 | 900.1 | 1157.1 | 2443.4 | 548.9 | 1440.3 | 2167.5 | 4156.6 | 1.43 | 1.60 | 1.88 | 1.70 |
| C | 381.6 | 876.6 | 1141.8 | 2400.0 | 592.8 | 1446.3 | 2182.9 | 4222.0 | 1.56 | 1.65 | 1.91 | 1.76 |
| CPh | 386.6 | 872.4 | 1108.2 | 2367.2 | 563.6 | 1394.8 | 2120.3 | 4078.7 | 1.46 | 1.60 | 1.92 | 1.72 |
| SEM4 | 10.53 | 23.44 | 32.42 | 45.16 | 18.70 | 34.33 | 39.70 | 61.25 | 0.071 | 0.028 | 0.040 | 0.023 |
| P-value | ||||||||||||
| D | 0.952 | 0.633 | 0.421 | 0.355 | 0.630 | 0.280 | 0.645 | 0.293 | 0.742 | 0.021 | 0.129 | 0.010 |
| Ph | 0.403 | 0.280 | 0.780 | 0.575 | 0.066 | 0.843 | 0.825 | 0.406 | 0.090 | 0.057 | 0.841 | 0.089 |
| D×Ph | 0.634 | 0.476 | 0.781 | 0.514 | 1.000 | 0.474 | 0.380 | 0.294 | 0.861 | 0.886 | 0.719 | 0.955 |
1
Data shown per diet type represent treatment means from n=10 replicate floor pens (e.g. treatments A+APh). Data shown for PFA represent means from n=15 replicate pens (e. g. A+B+C). Within the same column means with different superscript (A, B) per diet type, differ significantly (P<0.05).
2
Diet type (A, B and C): for each growth phase diet type A optimal for energy and protein; B and C suboptimal for protein and energy compared to A by 3 and 6% respectively.
3
Phytogenic supplementation (No=0 mg/kg diet and Yes=125 mg/kg diet).
4
Standard error of the means.