Table 6.
Characteristics of the egg yolk depending on the specific concentration of citric acid applied on the shell.
| Characteristic | Time (days) | Group |
SEM | Factors |
|||||
|---|---|---|---|---|---|---|---|---|---|
| CA0 | CA10 | CA15 | Total | CA | T | CA × T | |||
| YW (g) | 0 | 15.37 | 15.37a | 0.267 | - | 1 | - | ||
| 7 | 15.88 | 15.74 | 15.70 | 15.77b | 0.141 | ||||
| 14 | 16.65 | 16.42 | 16.55 | 16.54a,b | 0.160 | ||||
| 21 | 16.87 | 16.50 | 16.59 | 16.65b | 0.153 | ||||
| 28 | 17.13 | 16.72 | 16.72 | 16.86a,b | 0.272 | ||||
| YP (%) | 0 | 25.37 | 25.37a | 0.525 | - | 1 | - | ||
| 7 | 27.70 | 27.62 | 27.70 | 27.67b | 0.246 | ||||
| 14 | 27.41 | 26.44 | 27.51 | 27.12b | 0.291 | ||||
| 21 | 26.90 | 27.96 | 26.99 | 27.28b | 0.383 | ||||
| 28 | 27.91 | 28.48 | 28.20 | 28.20b | 0.263 | ||||
| YI | 0 | 44.47 | 44.47c | 0.579 | - | 1 | - | ||
| 7 | 41.91 | 40.33 | 42.99 | 41.74b | 0.725 | ||||
| 14 | 38.11x | 39.00y | 40.18y | 39.10b | 0.373 | ||||
| 21 | 37.53x | 37.52x | 38.37y | 37.81b | 0.376 | ||||
| 28 | 33.99x | 36.53y | 36.02y | 35.51a | 0.334 | ||||
| YC (pts) | 0 | 13.48 | 13.84b | 0.162 | - | 1 | - | ||
| 7 | 12.80 | 12.20 | 12.63 | 12.54a | 0.122 | ||||
| 14 | 12.46 | 12.14 | 12.30 | 12.30a | 0.088 | ||||
| 21 | 12.53 | 12.55 | 12.23 | 12.44a | 0.087 | ||||
| 28 | 12.50y | 12.13x,y | 11.83x | 12.15a | 0.107 | ||||
| YpH | 0 | 6.29 | 6.29a | 0.013 | - | 1 | - | ||
| 7 | 6.37y | 6.35y | 6.26x | 6.33a,b | 0.013 | ||||
| 14 | 6.38 | 6.36 | 6.39 | 6.38b | 0.013 | ||||
| 21 | 6.42x | 6.58y | 6.46x | 6.49c | 0.017 | ||||
| 28 | 6.54 | 6.48 | 6.51 | 6.51c | 0.021 | ||||
x,ymeans within the row differ significantly at P ≤ 0.05; a,b means within the column differ significantly at P ≤ 0.05.
Abbreviations: CA, citric acid; T, time; YC, yolk color; YI, yolk index; YP, yolk proportion in egg; YpH, pH of yolk; YW, yolk weight.
1
The influence of factor significant at P ≤ 0.05.