Table 7.
Effect of supplemental Zn in late gestation on preweaning mortality of pigs by treatment and weight classification1
| Treatment | |||||
|---|---|---|---|---|---|
| Item | CON2 | INT3 | HI4 | Chi-square5 | P-value |
| Piglet mortality | |||||
| Overall | 5.41 | 0.07 | |||
| Dead6 | 235 | 188 | 186 | ||
| Alive7 | 1,330 | 1,236 | 1,339 | ||
| Total pigs | 1,565 | 1,424 | 1,525 | ||
| Mortality, % | 15.0 | 13.2 | 12.2 | ||
| Low birth weight (≤1.00 kg) | 5.94 | 0.05 | |||
| Dead6 | 92 | 60 | 65 | ||
| Alive7 | 148 | 105 | 166 | ||
| Total pigs | 240 | 165 | 231 | ||
| Mortality, % | 38.3 | 36.4 | 28.1 | ||
| Normal birth weight (1.01 to 1.75 kg) | 0.11 | 0.94 | |||
| Dead6 | 127 | 120 | 112 | ||
| Alive7 | 987 | 938 | 909 | ||
| Total pigs | 1,114 | 1,058 | 1,021 | ||
| Mortality, % | 11.4 | 11.3 | 11.0 | ||
| Heavy birth weight (≥1.76 kg) | 5.20 | 0.07 | |||
| Dead6 | 16 | 8 | 9 | ||
| Alive7 | 195 | 193 | 264 | ||
| Total pigs | 211 | 201 | 273 | ||
| Mortality, % | 7.6 | 4.0 | 3.3 | ||
1Data presented as counts of pigs.
2Diets containing 125 ppm supplemental Zn as AvailaZinc and ZnSO4·H2O.
3Diets containing 365 ppm supplemental Zn as Control + ZnSO4·H2O.
4Diets containing 595 ppm supplemental Zn as Control + ZnSO4·H2O.
5df = 2.
6Represents dead pigs from birth to weaning and does not include stillborn pigs.
7Represents live piglets from birth to weaning.