Table 1.
Effect of the form of supplemental Se on the concentration of progesterone (P4) in the peripheral plasma of cows during the early luteal phase of the estrous cycle 1.
| Variable | Treatment | p-Value 2 | |
|---|---|---|---|
| ISe | MIX | ||
| Mean ± SEM | Mean ± SEM | ||
| Progesterone (ng/mL) | |||
| Cerny et al., 2016 * | |||
| No. of cows (n) | 9 | 9 | |
| Day 6 † | 3.44 ± 0.18 a | 5.14 ± 0.60 b | 0.035 |
| Experimental Study | |||
| No. of cows (n) | 12 | 12 | |
| Day 4 | 1.02 ± 0.22 | 0.94 ± 0.12 | 0.740 |
| Day 7 † | 2.92 ± 0.27 a | 3.91 ± 0.16 b | 0.006 |
| Day 10 | 7.17 ± 0.54 | 6.36 ± 0.55 | 0.308 |
1 Selenium was supplemented at 35 ppm as either inorganic (ISe; sodium selenite), or a 1:1 combination (MIX) of ISe and organic (OSe, SEL-PLEX). Selenium was provided ad libitum in free-choice vitamin-mineral premixes; 2 p-Values associated with one-way ANOVA; * Adapted from results reported in Cerny et al., 2016; † Means ± SEM with different superscripted letters (a,b) differ (p ≤ 0.05).