Table 3.
Foster sow parity class | Primiparous | Second | Mid | Significance | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Birth weight class | Light | Heavy | Light | Heavy | Light | Heavy | SED | Birth weight class | Foster parity | Birth weight × foster parity |
BW, kg | ||||||||||
Day 0 | 1.06 | 1.68 | 1.04 | 1.71 | 1.07 | 1.69 | 0.013 | <0.001 | 0.828 | 0.059 |
Day 10 | 2.94c | 3.82b | 2.88c | 4.15a | 3.08c | 3.80b | 0.094 | <0.001 | 0.403 | 0.020 |
Day 28 | 6.88 | 8.16 | 7.25 | 8.80 | 7.43 | 8.70 | 0.195 | <0.001 | 0.004 | 0.664 |
Day 34 | 8.29 | 9.67 | 8.40 | 10.0 | 8.69 | 10.7 | 0.216 | <0.001 | 0.011 | 0.356 |
Day 68 | 27.8 | 31.6 | 27.8 | 32.0 | 28.4 | 33.9 | 3.73 | <0.001 | 0.025 | 0.269 |
ADG, g/d | ||||||||||
Day 0 to 10 | 173c | 197bd | 171cd | 227a | 186c | 196b | 8.45 | <0.001 | 0.225 | 0.025 |
Day 0 to 28 | 204 | 226 | 217 | 248 | 221 | 245 | 6.26 | <0.001 | 0.007 | 0.738 |
Day 10 to 28 | 224 | 246 | 239 | 261 | 240 | 273 | 9.19 | <0.001 | 0.022 | 0.681 |
Day 28 to 34 | 227 | 249 | 199 | 203 | 209 | 327 | 24.9 | 0.057 | 0.066 | 0.088 |
Day 28 to 68 | 535 | 602 | 527 | 596 | 538 | 646 | 12.7 | <0.001 | 0.039 | 0.145 |
Feed intake, g/(day ∙ piglet) | ||||||||||
Day 28 to 34 | 197 | 234 | 174 | 182 | 179 | 271 | 17.5 | 0.006 | 0.034 | 0.073 |
Day 28 to 68 | 649 | 731 | 657 | 725 | 664 | 818 | 21.6 | <0.001 | 0.028 | 0.073 |
Feed intake, kg/ piglet | ||||||||||
Day 28 to 34 | 1.18 | 1.41 | 1.04 | 1.09 | 1.08 | 1.63 | 0.105 | 0.006 | 0.034 | 0.073 |
Day 28 to 68 | 25.3 | 28.5 | 25.6 | 28.3 | 25.9 | 31.9 | 0.841 | <0.001 | 0.028 | 0.073 |
G:F ratio | ||||||||||
Day 28 to 68 | 0.824 | 0.825 | 0.803 | 0.826 | 0.812 | 0.789 | 0.077 | 0.961 | 0.065 | 0.065 |
Total litter CV | ||||||||||
Day 28 | 14.4 | 10.6 | 15.9 | 11.2 | 13.8 | 13.8 | 1.39 | 0.029 | 0.613 | 0.226 |
Day 68 | 11.8 | 10.2 | 11.3 | 9.77 | 12.5 | 10.4 | 1.19 | 0.079 | 0.741 | 0.967 |
Total litter weight, kg | ||||||||||
Day 28 | 83.4 | 98.5 | 84.6 | 106 | 87.6 | 103 | 2.30 | <0.001 | 0.081 | 0.278 |
Day 68 | 329 | 374 | 328 | 378 | 337 | 400 | 7.217 | <0.001 | 0.036 | 0.372 |
1Pigs were cross-fostered within 12 to 24 h after birth (day 0), creep feed was provided from 10 d to weaning (day 28.6, SD = 0.46) and piglets remained in the same litter until ~10 wk of age (day 67.6, SD = 0.46). Individual pigs were weighed at birth (within 12 h after birth), days 10, 19, 28, 1 wk postweaning and at 10 wk of age.
2Data are expressed at least square means. Averages within row with different superscripts (a,b,c,d) differ significantly (P < 0.05).