Table 8. Study D: key analysed values of creep, starter and grower feeds (as is).
| Treatment | Dry matter (%) |
Crude protein (%) |
Crude fat (%) |
Ash (%) |
Fe (mg/kg) |
Microtracer (% recovery) |
Calculated ferric citrate content (mg/kg feed)1 |
|---|---|---|---|---|---|---|---|
| Creep feed | 92.43 | 24.92 | 3.38 | 6.27 | 56.8 | NA | NA |
| Starter diet (0–14 d) | |||||||
| T1 Control | 91.09 | 20.09 | 3.60 | 5.48 | 89.6 | NA | NA |
| T2 Fe (II) sulphate | 90.96 | 20.05 | 3.64 | 5.52 | 181.7 | NA | NA |
| T3 Fe (III) oxide | 90.83 | 20.10 | 3.66 | 5.50 | 188.8 | NA | NA |
| T4 Ferric citrate | 91.22 | 20.18 | 3.62 | 5.53 | 179.6 | 80% | 400 |
| T5 Ferric citrate + Fe (II) sulphate | 91.18 | 20.15 | 3.59 | 5.57 | 266.6 | 79% | 395 |
| Grower diet (15–42 d) | |||||||
| T1 Control | 90.98 | 18.62 | 4.47 | 5.40 | 75.4 | NA | NA |
| T2 Fe (II) sulphate | 90.86 | 18.62 | 4.48 | 5.39 | 171.5 | NA | NA |
| T3 Fe (III) oxide | 90.91 | 18.64 | 4.50 | 5.42 | 176.8 | NA | NA |
| T4 ferric citrate | 91.11 | 18.59 | 4.48 | 5.39 | 177.6 | 95% | 475 |
| T5 Ferric citrate + Fe (II) sulphate | 90.83 | 18.64 | 4.51 | 5.42 | 256.7 | 88% | 440 |
Notes:
NA = Not applicable.
1
Calculated ferric citrate = % recovery of microtracer × ferric citrate dose.