Table 6.
Effects of diet density and growing curve and their interaction on body composition (% body weight on DM basis) of broiler breeder pullets at 6, 13, and 19 wk of age.
| Crude protein, % DM | Ash, % DM | Fat, % DM | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Effects | 6 wk | 13 wk | 19 wk | 6 wk | 13 wk | 19 wk | 6 wk | 13 wk | 19 wk |
| Diet density | |||||||||
| CON | 65.6 | 64.4 | 62.4 | 12.8 | 13.5 | 12.0 | 12.9 | 15.2 | 22.2 |
| DIL | 66.0 | 61.0 | 64.6 | 11.8 | 13.2 | 11.3 | 12.6 | 16.7 | 17.4 |
| SEM (n = 10) | 1.2 | 1.8 | 1.2 | 0.5 | 0.9 | 0.7 | 1.1 | 1.1 | 1.2 |
| Target body weight | |||||||||
| RBW | 67.2 | 64.3 | 62.9 | 12.2 | 14.5 | 11.5 | 12.4 | 16.4 | 18.6 |
| HBW | 64.4 | 61.2 | 64.1 | 12.5 | 12.2 | 11.8 | 13.1 | 15.4 | 21.0 |
| SEM (n = 10) | 1.2 | 1.8 | 1.2 | 0.5 | 0.9 | 0.7 | 1.1 | 1.1 | 1.2 |
| Treatments | |||||||||
| CON / RBW | 67.2 | 67.8 | 61.0 | 13.7a | 15.1 | 12.0 | 12.8 | 16.0 | 23.1a |
| CON / HBW | 64.0 | 61.1 | 63.8 | 12.0a,b | 11.9 | 12.0 | 12.9 | 14.3 | 21.3a,b |
| DIL / RBW | 67.2 | 60.8 | 64.9 | 10.7b | 13.8 | 11.0 | 12.1 | 16.8 | 14.0b |
| DIL / HBW | 64.8 | 61.3 | 64.3 | 13.0a,b | 12.6 | 11.6 | 13.2 | 16.5 | 20.8a,b |
| SEM (n = 5) | 1.6 | 2.5 | 1.7 | 0.6 | 1.2 | 1.0 | 1.5 | 1.5 | 1.8 |
| P-values | |||||||||
| Diet | 0.805 | 0.178 | 0.210 | 0.122 | 0.783 | 0.515 | 0.877 | 0.323 | 0.009 |
| Target BW | 0.095 | 0.218 | 0.509 | 0.678 | 0.074 | 0.767 | 0.685 | 0.492 | 0.166 |
| Interaction | 0.407 | 0.120 | 0.410 | 0.012 | 0.271 | 0.892 | 0.961 | 0.713 | 0.003 |
a,bLeast square means not sharing a common superscript differed as compared using Tukey's Honestly Significant Difference test (Tukey, 1953).