Table 3.
The range and standard deviation in broiler performance and nutrient utilisation
| Minimum | Mean | Maximum | Standard deviation | |
|---|---|---|---|---|
| Dry matter intake (g/d) | ||||
| 7–14 d | 28.8 | 34.4 | 39.3 | 2.40 |
| 14–21 d | 58.6 | 71.5 | 83.1 | 4.73 |
| 21–28 d | 92.2 | 115.2 | 134.9 | 8.84 |
| Total | 61.6 | 73.8 | 85.7 | 4.94 |
| Liveweight gain (g/d) | ||||
| 7–14 d | 21.4 | 28.5 | 33.2 | 3.34 |
| 14–21 d | 42.4 | 57.5 | 65.1 | 5.90 |
| 21–28 d | 58.1 | 81.8 | 96.3 | 8.45 |
| Total | 41.9 | 55.9 | 64.2 | 5.67 |
| Gain:feed | ||||
| 7–14 d | 0.731 | 0.828 | 0.906 | 0.051 |
| 14–21 d | 0.719 | 0.804 | 0.884 | 0.044 |
| 21–28 d | 0.615 | 0.711 | 0.782 | 0.032 |
| Total | 0.672 | 0.758 | 0.817 | 0.036 |
| In vivo viscosity (cp) | 3.3 | 5.9 | 13.0 | 1.97 |
| Apparent metabolizable energy (MJ/kg DM) | 12.7 | 13.9 | 14.7 | 0.44 |
| ME:gain | 16.5 | 18.3 | 20.7 | 0.89 |
| Dry matter retention | 0.697 | 0.721 | 0.753 | 0.013 |
| Ileal dry matter digestibility | 0.627 | 0.700 | 0.756 | 0.027 |
| Ileal starch digestibility | 0.832 | 0.917 | 0.972 | 0.033 |
| Ileal crude protein digestibility | 0.703 | 0.769 | 0.832 | 0.033 |