Table 3.
Color parameter (lightness, L*, redness, a*, and yellowness, b*, indexes) values of the yolk from hens fed three different diets (C, HI25, HI50) and collected at three different hen ages (20, 27, and 35 weeks).
| Colour Parameter | Diet | Hen Age (Weeks) | ||
|---|---|---|---|---|
| A20 | A27 | A35 | ||
| L* | C | 65.804 ab | 64.686 b,Y | 67.865 a,XY |
| H25 | 66.665 | 68.553 X | 68.671 X | |
| H50 | 68.858 a | 68.723 a,X | 65.537 b,Y | |
| a* | C | 6.514 ab,X | 8.338 a,X | 2.874 b,X |
| H25 | 1.353 ab,Y | 2.395 a,Y | −1.747 b,Y | |
| H50 | −0.437 b,Y | −2.422 b,Z | 5.268 a,X | |
| b* | C | 31.907 X | 32.428 | 32.558 |
| H25 | 33.463 X | 34.551 | 31.020 | |
| H50 | 20.458 b,Y | 28.391 a | 33.300 a | |
a,b: different superscript letters are significantly different means within the row. X,Y,Z: different superscript letters are significantly different means within the column.