Table 3. Effects of feeding type and dietary energy level on litter size and piglet performance in sows during summer season.
| Item1) | Feeding type | Energy level (ME, kcal/kg) | SEM | p-value | ||||
|---|---|---|---|---|---|---|---|---|
| CF | FF | 3,300 | 3,400 | F | E | F × E | ||
| Litter size | ||||||||
| Initial litter size | 11.68 | 11.74 | 11.67 | 11.75 | 0.23 | 0.997 | 0.541 | 0.361 |
| Piglets weaned | 11.25 | 11.40 | 11.22 | 11.43 | 0.25 | 0.673 | 0.326 | 0.482 |
| Survival rate (%) | 96.38 | 97.11 | 96.13 | 97.36 | 1.13 | 0.459 | 0.331 | 0.825 |
| Litter weight (kg) | ||||||||
| Initial (d 1) | 15.95 | 16.28 | 16.10 | 16.14 | 0.36 | 0.646 | 0.587 | 0.548 |
| Initial (kg/pig, d 1) | 1.37 | 1.39 | 1.38 | 1.38 | 0.01 | 0.312 | 0.944 | 0.759 |
| Weaning (d 21) | 69.01 | 73.92 | 69.88 | 73.05 | 1.61 | 0.006 | 0.033 | 0.833 |
| Weaning (kg/pig, d 21) | 6.14 | 6.49 | 6.23 | 6.40 | 0.06 | 0.001 | 0.007 | 0.195 |
| Total weight gain | 53.06 | 57.65 | 53.79 | 56.92 | 1.35 | 0.002 | 0.017 | 0.932 |
| Average weight gain (g/pig) | 224.27 | 240.88 | 228.18 | 237.17 | 3.08 | 0.001 | 0.002 | 0.466 |
1)
Data are means of seven replicates.
SEM, standard error of means; CF, conventional feeding; FF, free feeding; F, feeding type, E, dietary energy level, F × E, feeding type × dietary energy level.