Table 2.
Amino acid (AA) composition of the experimental diets and recommended ideal amino acid ratio (IAAR) in diets for growing chicken.
| Dietary AA Concentration | Ideal Dietary Ratios for Individual Amino Acids Related to Lys (Lys = 100) | ||||
|---|---|---|---|---|---|
| g/16 g N | Ratio Relative to Lys | Mean of Literature Data [8] | GRSS [13] | NRC [14] | |
| Lysine (Lys) | 5.09 | 100 | 100 | 100 | 100 |
| Methionine (Met) | 1.44 | 28 | 40 | 37 | 42 |
| Methionine + Cysteine (Met + Cys) | 2.91 | 57 | 74 | 71 | 72 |
| Threonine (Thr) | 3.63 | 71 | 66 | 67 | 74 |
| Tryptophan (Trp) | 0.96 | 19 | 16 | 16 | 18 |
| Arginine (Arg) | 6.26 | 123 | 105 | 108 | 110 |
| Histidine (His) | 2.36 | 46 | 34 | 32 | 32 |
| Isoleucine (Ile) | 4.03 | 79 | 69 | 69 | 73 |
| Valine (Val) | 4.24 | 83 | 80 | - | 82 |
| Leucine (Leu) | 7.50 | 147 | 110 | 112 | 109 |
| Phenylalanine (Phe) | 4.71 | 93 | 66 | 65 | 65 |
| Phenylalanine + Tyrosine (Phe + Tyr) | 8.35 | 164 | 120 | 118 | 122 |