Table 3.
The targeted and measured concentration of 3-NOP in the diets (mean ± SD) and estimated daily intake of 3-NOP for the subset of feedlot cattle that met the criteria for measuring gaseous emissions
| Treatment | |||
|---|---|---|---|
| Item | Low | Medium | High |
| Target 3-NOP concentration in basal diet, mg/kg DM | 100 | 125 | 150 |
| Measured 3-NOP concentration basal diet (n = 9)1, mg/kg DM | 91.2 ± 2.87 | 114.0 ± 3.23 | 133.1 ± 4.68 |
| Recovery, % | 91.2 | 91.2 | 88.8 |
| Calculated 3-NOP concentration in total diet consumed2, mg/kg total DM | 85.6 | 107.6 | 124.5 |
| Measured 3-NOP concentration in basal diet (n = 2)3, mg/kg DM | |||
| At morning feeding (0900 hours) | 92.5 ± 5.72 | 106.6 ± 8.78 | 137.9 ± 0.52 |
| 6 h after morning feeding (1500 hours) | 94.0 ± 3.88 | 107.5 ± 3.04 | 135.3 ± 6.65 |
| Before next day morning feeding (24 h after morning feeding) | 91.6 ± 8.90 | 109.7 ± 5.25 | 129.4 ± 4.90 |
1Basal diet was provided in GrowSafe feed bunks, sampled daily, and composited by week for analyses of 3-NOP concentration. 3-NOP concentration in the control diet was zero.
2Calculated based on total DMI (basal diet DMI + pellet DMI in the GEM system) and measured concentration of 3-NOP in the basal diet.
3Based on diet samples collected from the GrowSafe feed bunks at different sampling points of the day for 2 consecutive weeks per period.