Table 4.
Standardized ileal digestibility (%) of amino acids (AA) in copra and palm kernel products and in soybean meal1
| Item | Copra meal | Copra expellers | Palm kernel meal | Palm kernel expellers | Soybean meal |
|---|---|---|---|---|---|
| Crude protein | 79.9 | 67.6 | 71.3 | 81.8 | 87.0 |
| Indispensable AA | |||||
| Arg | 91.2 | 90.0 | 88.3 | 90.4 | 94.0 |
| His | 82.5 | 73.2 | 80.8 | 83.6 | 90.0 |
| Ile | 81.6 | 76.7 | 80.4 | 83.5 | 89.0 |
| Leu | 81.6 | 78.5 | 79.7 | 82.4 | 88.0 |
| Lys | 72.8 | 40.3 | 71.1 | 76.5 | 89.0 |
| Met | 85.5 | 82.1 | 82.2 | 85.0 | 90.0 |
| Phe | 84.5 | 81.4 | 82.2 | 84.6 | 88.0 |
| Thr | 76.7 | 64.4 | 73.9 | 77.2 | 85.0 |
| Trp | 88.4 | 66.3 | 87.5 | 89.4 | 91.0 |
| Val | 79.0 | 77.8 | 77.2 | 81.0 | 87.0 |
| Mean | 82.6 | 73.1 | 80.3 | 83.4 | 89.1 |
| Dispensable AA | |||||
| Ala | 78.2 | 79.0 | 72.5 | 79.0 | 85.0 |
| Asp | 78.9 | 66.5 | 75.8 | 77.5 | 87.0 |
| Cys | 68.0 | 53.1 | 71.7 | 76.4 | 84.0 |
| Glu | 79.9 | 67.3 | 81.2 | 82.0 | 89.0 |
| Gly | 76.2 | 60.6 | 65.1 | 77.9 | 84.0 |
| Pro | 128.8 | 125.0 | 54.9 | 121.5 | 113.0 |
| Ser | 82.0 | 70.5 | 80.0 | 83.7 | 89.0 |
| Tyr | 82.8 | 58.0 | 80.1 | 82.7 | 88.0 |
| Mean | 83.7 | 72.5 | 75.2 | 83.7 | 89.9 |
| Mean all AA | 83.2 | 72.8 | 77.6 | 83.5 | 89.5 |