Table 5.
Egg quality of laying breeder hens.
| Items | Treatments |
SEM |
p-value |
||||
|---|---|---|---|---|---|---|---|
| CON | AOP1 | AOP3 | AOP | Linear | Quadratic | ||
| Egg shape index | 1.30 | 1.31 | 1.27 | 0.008 | 0.217 | 0.169 | 0.276 |
| Eggshell thickness, mm | 0.312 | 0.308 | 0.314 | 0.004 | 0.392 | 0.813 | 0.618 |
| Eggshell strength (kg/cm2) | 3.50b | 4.58a | 4.28a | 0.159 | 0.013 | 0.006 | 0.021 |
| Eggshell ratio (%) | 12.70 | 13.33 | 13.46 | 0.192 | 0.232 | 0.113 | 0.529 |
| Albumen height (mm) | 2.57b | 3.78a | 3.35a | 0.173 | 0.011 | 0.048 | 0.019 |
| Yolk colour | 5.33 | 5.83 | 5.67 | 0.184 | 0.541 | 0.469 | 0.404 |
| Haugh unit | 48.74b | 62.87a | 57.11a | 1.870 | 0.005 | 0.045 | 0.007 |
| Yolk percentage (%) | 32.65 | 33.02 | 32.78 | 0.444 | 0.943 | 0.903 | 0.751 |
a-b
Means within a row with no common superscript differ significantly (p < 0.05). Values are means ± SEM (n = 12 eggs). Abbreviations: CON, control group, basal diet; AOP1, basal diet supplemented with 1 g/kg AOP; AOP3, basal diet supplemented with 3 g/kg AOP.