Table 3.
Egg quality of laying hens supplemented with different doses of incomplete degradation products of galactomannan (IDPG) at 72 and 76 wk of age.
| IDPG level (%) |
||||||
|---|---|---|---|---|---|---|
| Items | 0 | 0.01 | 0.025 | 0.05 | SEM | P values |
| Values at 72 wk of age | ||||||
| Eggshell strength (kg/cm2) | 2.93b | 3.44ab | 3.28ab | 3.78a | 0.12 | 0.041 |
| Eggshell thickness (mm) | 0.34 | 0.33 | 0.32 | 0.32 | 0.01 | 0.072 |
| Albumen height (mm) | 6.57 | 5.62 | 6.64 | 6.76 | 0.16 | 0.060 |
| Haugh unit | 75.79 | 70.26 | 77.72 | 78.69 | 1.43 | 0.156 |
| Yolk color | 8.21 | 7.98 | 7.62 | 7.83 | 0.13 | 0.437 |
| Yolk relative weight (%) | 25.06 | 25.13 | 25.99 | 24.60 | 0.29 | 0.414 |
| Values at 76 wk of age | ||||||
| Eggshell strength (kg/cm2) | 3.43 | 3.54 | 3.42 | 3.59 | 0.11 | 0.937 |
| Eggshell thickness (mm) | 0.35 | 0.33 | 0.32 | 0.32 | 0.01 | 0.102 |
| Albumen height (mm) | 6.80 | 6.54 | 6.31 | 6.43 | 0.15 | 0.710 |
| Haugh unit | 78.88 | 76.34 | 77.06 | 76.22 | 1.07 | 0.824 |
| Yolk color | 7.42 | 7.45 | 6.91 | 6.96 | 0.14 | 0.377 |
| Yolk relative weight (%) | 24.59 | 25.41 | 25.95 | 25.18 | 0.33 | 0.554 |
a–cMeans with different superscript letters in the same row differ significantly (P < 0.05).