Table 3.
Effects of different light regime on egg quality of laying hens.
| 16 L:8 D | 9 L:15 D | P value | |
|---|---|---|---|
| Eggshell thickness, mm | 0.346 ± 0.003 | 0.352 ± 0.004 | 0.277 |
| Egg shape index | 1.29 ± 0.01 | 1.3 ± 0.01 | 0.508 |
| Eggshell hardness, kg. f | 3.81 ± 0.05a | 4.14 ± 0.1a | 0.011 |
| Albumen height, mm | 4.4 ± 0.13 | 4.57 ± 0.14 | 0.377 |
| Yolk color | 7.67 ± 0.06 | 7.61 ± 0.1 | 0.617 |
| Haugh units | 60.0 ± 0.8 | 62.3 ± 1.5 | 0.214 |
| Percentage of yolk, % | 28.5 ± 0.5 | 28.8 ± 0.6 | 0.698 |
| Percentage of eggshell, % | 10.9 ± 0.1 | 11.2 ± 0.2 | 0.141 |
Data were presented as mean ± SE (n = 6).
a
Means with different superscripts differ significantly (P < 0.05).