Table 4.
Mean values (x̅) and standard deviations (± SD) for egg yolk colour.
| Factor | Indicator | Yolk colour (score) | Colour | ||
|---|---|---|---|---|---|
| L* | a* | b* | |||
| Group | A | 5.40b | 51.74 | 4.94a | 26.87 |
| B | 5.85a | 51.34 | 3.95b | 20.93 | |
| ± SD* | ± 1.50 | ± 3.78 | ± 2.20 | ± 6.96 | |
| p value | 0.009 | 0.069 | 0.000 | 0.135 | |
| Age of hens (weeks) | I (19) | 5.42b | 47.92c | 1.59d | 18.84d |
| II (24) | 6.24a | 47.45c | 3.52c | 21.32c | |
| III (29) | 5.78ab | 54.84a | 4.99b | 30.98b | |
| IV (34) | 5.58ab | 54.55a | 5.92b | 32.93a | |
| V (39) | 5.12b | 52.89b | 6.16a | 31.86ab | |
| ±SD* | 1.39 | 1.99 | 1.35 | 3.37 | |
| p value | 0.000 | 0.000 | 0.000 | 0.000 | |
| Interaction | 0.027 | 0.117 | 0.000 | 0.001 | |
Different letters (a, b) indicate a significant difference between treatments (A–B) and periods (I–V) at p < 0.05.
*Standard deviation.
1TREATMENT: A, control with soybean meal; B, experimental with yellow lupin, narrow-leaved lupin and peas.