Skip to main content
. 2019 Feb 11;97(4):1656–1670. doi: 10.1093/jas/skz062

Table 3.

The effect of foster sow parity (primiparous, second, or mid parity sow [parities 3 to 5]) and birth weight class (light [<1.25 kg] or heavy [1.50 to 2.00 kg]) and their interaction on performance from birth to 10 wk of age1,2

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).