Table 2.
Concentrations of minerals, phytate, and apparent total tract digestibility (ATTD) and standardized total tract digestibility (STTD) of phosphorus in copra and palm kernel ingredients (as-fed basis)1
| Item | Copra meal | Copra expellers | Palm kernel meal | Palm kernel expellers | Soybean meal |
|---|---|---|---|---|---|
| Ca, % | 0.04 | 0.11 | 0.20 | 0.25 | 0.33 |
| Cl, % | 0.37 | - | - | 0.15 | 0.05 |
| K, % | 1.83 | 1.75 | - | 0.64 | 2.11 |
| Mg, % | 0.31 | 0.23 | - | 0.29 | 0.28 |
| Na, % | 0.04 | - | - | 0.03 | 0.05 |
| P, % | 0.52 | 0.53 | 0.54 | 0.52 | 0.67 |
| S, % | 0.31 | - | - | 0.22 | 0.4 |
| Cu, ppm | 25 | 40 | - | 21 | 16.5 |
| Fe, ppm | 486 | - | - | 534 | 190.5 |
| Mn, ppm | 69 | 75 | - | 131 | 36.7 |
| Zn, ppm | 49 | 53 | - | 32 | 47.9 |
| Phytate, % | 0.79 | 0.78 | 1.12 | 1.29 | 1.55 |
| Phytate P, % | 0.22 | 0.22 | 0.32 | 0.35 | 0.44 |
| Non-phytate P, % | 0.30 | 0.31 | 0.22 | 0.16 | 0.23 |
| P digestibility without phytase | |||||
| ATTD, % | 60.8 | 46.0 | 48.9 | 30.0 | 41.1 |
| STTD, % | 70.6 | 56.5 | 57.9 | 39.8 | 49.6 |
| P digestibility with phytase | |||||
| ATTD, % | 80.8 | - | 64.1 | 58.2 | 72.2 |
| STTD, % | 90.3 | - | 73.5 | 68.1 | 81.1 |