Table 4.
Effect of 25OHD on laying hen feed consumption during laying period.
| Feeding stages | Guide1 (g/bird/day) | D (g/bird/day) | DD (g/bird/day) | 25D (g/bird/day) | SEM | P-value |
|---|---|---|---|---|---|---|
| Peaking2 | 84 | 105.8 | 103.7 | 105.4 | 1.4 | 0.542 |
| Layer 2 | 96 | 106.0A | 95.9B | 104.9A | 1.4 | <0.0001 |
| Layer 3 | 100 | 108.6B | 113.2A | 107.9B | 0.9 | 0.001 |
| Layer 4 | 94 | 108.7 | 110.5 | 108.3 | 0.9 | 0.312 |
| Layer 5 | 93 | 106.7 | 106.7 | 106.0 | 0.9 | 0.843 |
| 22–60 wk3 | 94 | 106.6 | 104.3 | 106.0 | 1.1 | 0.346 |
| 61–90 wk | 96 | 107.6 | 108.5 | 107.1 | 0.9 | 0.519 |
| 22–95 wk | 95 | 107.0 | 105.9 | 106.4 | 0.9 | 0.696 |
A,BMeans within a column with different superscripts are significantly different (P < 0.05).
Abbreviation: 25OHD, 25-hydroxyvitamin D3.
1
Guide: calculated feed consumption (average) from 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.
2
Peaking (22–38 wk), layer 2 (39–48 wk), layer 3 (49–60 wk), layer 4 (61–75 wk), and layer 5 (76–95 wk).
3
Accumulated feed consumption during the period indicated in the column.