Table 2.
Diet analysis (as-fed basis), %1
| No yeast additives | Yeast additives2 | |||
|---|---|---|---|---|
| Low Zn | High Zn | Low Zn | High Zn | |
| Phase 1 diets | ||||
| DM, % | 91.8 | 91.9 | 91.9 | 91.9 |
| CP, % | 20.5 | 19.9 | 20.2 | 20.1 |
| Ca, % | 1.23 | 1.23 | 1.20 | 1.20 |
| P, % | 0.77 | 0.75 | 0.77 | 0.76 |
| Zn, mg/kg | 263 | 3,230 | 245 | 3,204 |
| Live yeast, CFU/g | 200 | 500 | 7,100,000 | 9,700,000 |
| Phase 2 diets | ||||
| DM, % | 90.2 | 90.1 | 89.7 | 89.8 |
| CP, % | 18.9 | 19.0 | 19.1 | 19.6 |
| Ca, % | 1.38 | 1.41 | 1.38 | 1.33 |
| P, % | 0.73 | 0.72 | 0.74 | 0.72 |
| Zn, mg/kg | 234 | 2,435 | 257 | 2,233 |
| Live yeast, CFU/g | 300 | 700 | 10,500,000 | 5,900,000 |
| Phase 3 common diet | ||||
| DM, % | 88.4 | – | – | – |
| CP, % | 20.7 | – | – | – |
| Ca, % | 0.95 | – | – | – |
| P, % | 0.61 | – | – | – |
| Zn, mg/kg | 199 | – | – | – |
1 Complete diet samples were obtained from each treatment during manufacturing and homogenized to form a composite sample. Samples were submitted to Ward Laboratories (Kearney, NE) to analyze DM, CP, Ca, P, and Zn. Phase 1 and 2 diets were also sent to Analabs (Fulton, IL) to analyze active live yeast.
2Yeast pre- and probiotics included ActiSaf SC 47 HR+ at 0.1%, SafMannan at 0.05% and NucleoSaf at 0.05% in phase 1 diets and then concentrations were lowered by 50% in phase 2 diets (Phileo by Lesaffre,Milwaukee, WI).