Table 2.
Effect of dietary zinc (Zn) concentration (ppm) and challenge on fecal dry matter (%) on different days (n = 12)1,2
| Zn, ppm | Control | Challenge | |||||
|---|---|---|---|---|---|---|---|
| 1503 | 1,4003 | 2,5003 | 1504 | 1,400 | 2,5005 | SEM | |
| Day 0 | 35.6 | 32.2x | 31.5 | 33.2 | 26.3y | 31.2 | 2.12 |
| Day 3 | 22.7 | 23.7 | 24.5 | 25.7 | 26.0 | 23.2 | 2.38 |
| Day 5 | 20.9x | 23.8 | 20.9 | 13.2b,y | 24.2a | 23.9a | 2.11 |
| Day 7 | 23.2 | 24.3 | 21.6 | 20.4 | 23.7 | 25.9 | 2.02 |
| Day 14 | 23.7 | 23.8 | 22.7 | 25.0 | 21.5 | 24.2 | 1.93 |
1Reported estimate derived from the interaction model with Zn × challenge × day and the covariate of BW on d 0 and sex.
2 P-values: Zn = 0.88, challenge = 0.52, day < 0.01, challenge × day = 0.29, Zn × challenge = 0.33, Zn × day < 0.01, Zn × challenge × day = 0.05.
3Lower (≤0.04) on d 3, 5, 7, and 14 compared to d 0, with no difference between d 3, 5, 7, and 14.
4Lower (≤0.04) on d 3, 5, 7, and 14 compared to d 0, lower (< 0.01) on d 5 than on d 3, greater (<0.01) on d 14 than on d 5, no difference between d 3, 7, and 14.
5Lower (≤0.04) on d 3, 5, and 14 compared to d 0, no difference between d 3, 5, 7, and 14, and no difference between d 0 and 7.
abIndicate difference (P ≤ 0.05) between dietary Zn concentrations within challenge group and day.
xyIndicate difference (P ≤ 0.05) between challenge groups within dietary Zn concentration and day.
Values are least-square means with the standard error of mean (SEM)