Table 3.
Effect of 25OHD on laying hen BW during the laying period.
| Week | Guide1 (g/bird) | D (g/bird) | DD (g/bird) | 25D (g/bird) | SEM | P-value |
|---|---|---|---|---|---|---|
| 17 | 1,280 | 1,261.9 | 1,245.6 | 1,236.3 | 10.1 | 0.218 |
| 40 | 1,540 | 1,615.8A | 1,418.7B | 1,579.0A | 22.1 | <0.0001 |
| 60 | 1,560 | 1,691.8 | 1,636.8 | 1,637.2 | 21.2 | 0.129 |
| 75 | 1,560 | 1,766.1A | 1,702.9B | 1,690.9B | 20.3 | 0.039 |
| 95 | N/A | 1,755.7 | 1,699.7 | 1,661.4 | 27.7 | 0.083 |
A,BMeans within a column with different superscripts are significantly different (P < 0.05).
Abbreviation: 25OHD, 25-hydroxyvitamin D3.
1
Guide: referenced BW (average) according to Hy-Line W36 guide (2015); D: vitamin D3 at 2,760 IU/kg; DD: vitamin D3 at 5,520 IU/kg; 25D: vitamin D3 at 2,760 IU/kg plus 25OHD at 2,760 IU (69 μg)/kg.