Table 5.
Average total eggs per hen and classification of all eggs produced through 60 wk of age by broiler breeder pullets raised using different rearing strategies (RS), everyday spin feeding (EDS) or skip-a-day feeding (SAD), to reach target body weight for photostimulation (PS) at either 15 wks (15P) or 21 wks (21P). Values are the means ± SEM with 9 replicate pens of 38 hen per treatment (n = 18 for PS and RS main effects).
| Total | Settable |
Cracked |
Floor |
Double-yolked |
Dirty |
Misshaped |
|||
|---|---|---|---|---|---|---|---|---|---|
| RS × PS | PS | RS | #/hen | % | |||||
| 15P | 151 ± 6.9 | 83.2 ± 0.75 | 4.3 ± 0.24 | 2.7 ± 0.33 | 1.1 ± 0.06 | 8.2 ± 0.7 | 1.6 ± 0.10 | ||
| 21P | 160 ± 7.2 | 84.2 ± 0.53 | 3.7 ± 0.19 | 3.8 ± 0.35 | 0.5 ± 0.09 | 7.2 ± 0.33 | 1.3 ± 0.09 | ||
| SAD | 152 ± 11.2 | 84.2 ± 0.64 | 3.9 ± 0.21 | 2.8 ± 0.37 | 0.8 ± 0.13 | 7.5 ± 0.43 | 1.5 ± 0.09 | ||
| EDS | 159 ± 9.8 | 83.1 ± 0.68 | 4.0 ± 0.27 | 3.8 ± 0.31 | 0.9 ± 0.12 | 6.9 ± 0.19 | 1.4 ± 0.11 | ||
| RS × PS | 15P | SAD | 149 ± 5.9 | 83.8 ± 0.96 | 4.0 ± 0.21 | 2.3 ± 0.56 | 1.1 ± 0.05 | 8.0 ± 0.50 | 1.7 ± 0.13 |
| EDS | 153 ± 6.4 | 82.5 ± 0.98 | 4.5 ± 0.27 | 3.1 ± 0.31 | 1.1 ± 0.07 | 8.3 ± 0.88 | 1.4 ± 0.13 | ||
| 21P | SAD | 156 ± 5.6 | 84.7 ± 0.83 | 3.8 ± 0.20 | 3.2 ± 0.46 | 0.5 ± 0.10 | 6.9 ± 0.19 | 1.5 ± 0.18 | |
| EDS | 164 ± 5.9 | 83.7 ± 0.66 | 3.6 ± 0.15 | 4.5 ± 0.46 | 0.6 ± 0.10 | 7.5 ± 0.42 | 1.2 ± 0.13 | ||
| Source of variation | P values | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| PS | 0.09 | 0.29 | 0.07 | 0.02 | 0.00 | 0.09 | 0.05 | ||
| RS | 0.39 | 0.24 | 0.61 | 0.04 | 0.78 | 0.46 | 0.31 | ||
| PS × RS | 0.67 | 0.91 | 0.36 | 0.61 | 0.51 | 0.84 | 0.85 | ||
*Value significantly differs from the corresponding RS value for hens within the same PS curve.