Table 3.
Effect of dietary treatment and feeding regimen on the growth performance and carcass yield of broilers chickens.a
| Feeding Regimen (FR) | Ad Libitum | Restricted Feeding | SEM c | p-Value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Dietary Treatment (DT) | PC b | NG | EHS | PC | NG | EHS | FR | DT | DT * FR | |
| Initial weight g | 342.2 | 326.2 | 336.9 | 337.2 | 341.8 | 331.7 | 14.284 | 0.88 | 0.91 | 0.69 |
| Final weight g | 1967.9 | 1885.5 | 1909.6 | 1817.6 | 1806.3 | 1791.0 | 52.465 | 0.01 | 0.62 | 0.79 |
| Feed intake g/d | 76.6 | 73.5 | 74.2 | 70.1 | 69.1 | 68.8 | 1.234 | 0.01 | 0.81 | 0.37 |
| Weight gain g/d | 98.7 | 97.6 | 97.2 | 92.0 | 94.2 | 93.1 | 2.054 | 0.01 | 0.55 | 0.87 |
| Feed conversion ratio | 1.32 | 1.34 | 1.33 | 1.34 | 1.38 | 1.37 | 0.034 | 0.20 | 0.66 | 0.94 |
| Legs % | 8.3 | 8.3 | 8.3 | 8.4 | 8.4 | 8.5 | 0.179 | 0.53 | 0.82 | 0.84 |
| Thighs % | 9.0 | 8.8 | 8.9 | 8.9 | 8.8 | 9.0 | 0.137 | 0.72 | 0.53 | 0.84 |
| Breast % | 24.2 | 23.6 | 23.8 | 23.0 | 22.8 | 23.3 | 0.266 | 0.01 | 0.17 | 0.47 |
| Carcass % | 41.5 | 40.7 | 41.0 | 40.4 | 40.0 | 40.8 | 0.314 | 0.01 | 0.05 | 0.31 |
a Data are means of 30 replications per treatment with one bird/replicate.b PC = positive control; NC = negative control; EHS = Extract of humic substances obtained from a worm compost using an alkaline solution. c Standard error of the mean.