Table 9 Egg quality of hens fed dietary treatments at week 34. a–cMeans within rows not sharing a common suffix are significantly different at the 5% level of probability.
From: Feeding recycled food waste improved feed efficiency in laying hens from 24 to 43 weeks of age
Variable | Control | Food waste | 50:50 blend | SEM | P value |
|---|---|---|---|---|---|
External egg quality | |||||
Shell breaking strength (Kgf) | 4.69b | 3.98a | 4.55b | 0.07 | < 0.001 |
Shell thickness (mm) | 0.379b | 0.331a | 0.368b | 0.004 | < 0.001 |
Egg length (mm) | 56.8 | 56.9 | 57.0 | 0.16 | 0.900 |
Egg width (mm) | 44.3 | 44.3 | 44.2 | 0.12 | 0.254 |
Egg shape index | 0.779 | 0.780 | 0.777 | 0.002 | 0.212 |
Reflectivity (%) | 22.5 | 22.3 | 22.6 | 0.32 | 0.867 |
Internal egg quality | |||||
Albumen height (mm) | 8.69 | 9.39 | 9.00 | 0.31 | 0.352 |
Yolk colour | 11.9 | 12.1 | 11.8 | 0.10 | 0.490 |
Haugh unit | 88.9 | 91.5 | 91.5 | 1.57 | 0.387 |
Yolk height (mm) | 22.3 | 22.5 | 22.7 | 0.10 | 0.355 |
Yolk diameter (mm) | 41.9 | 42.3 | 42.8 | 0.33 | 0.463 |
Yolk index | 0.532 | 0.533 | 0.533 | 0.004 | 0.995 |
Egg proportion | |||||
Albumen weight (g) | 41.13 | 41.14 | 40.35 | 0.30 | 0.473 |
Yolk weight (g) | 16.28 | 16.46 | 16.44 | 0.11 | 0.783 |
Shell weight (g) | 6.07c | 5.43a | 5.83b | 0.04 | < 0.001 |
Albumen (%) | 64.70 | 65.23 | 64.40 | 0.18 | 0.137 |
Yolk (%) | 25.70 | 26.14 | 26.29 | 0.15 | 0.270 |
Shell (%) | 9.63c | 8.62a | 9.32b | 0.06 | < 0.001 |
