Amino acid | Chicks1 | Pigs2 |
|---|
| | Corn grain | Soybean meal | Sorghum grain | Meat & Bone meal | Corn grain | Soybean meal | Sorghum grain | Meat & bone meal |
|---|
Alanine | 87.6 | 88.9 | 85.4 | 90.2 | 88.5 | 89.0 | 87.2 | 90.5 |
Arginine | 88.4 | 90.6 | 87.2 | 91.4 | 89.3 | 90.2 | 88.4 | 91.3 |
Asparagine | 86.5 | 88.3 | 85.9 | 90.6 | 86.8 | 88.5 | 86.0 | 90.2 |
Aspartate | 87.2 | 89.5 | 86.1 | 90.2 | 86.3 | 88.2 | 85.8 | 89.7 |
Cysteine | 85.1 | 86.4 | 84.8 | 89.4 | 86.0 | 87.1 | 85.1 | 89.0 |
Glutamine | 88.6 | 89.5 | 87.6 | 90.8 | 87.7 | 89.2 | 86.8 | 90.8 |
Glutamate | 89.2 | 90.2 | 88.4 | 91.2 | 88.1 | 89.6 | 87.4 | 91.0 |
Glycine | 86.4 | 88.3 | 85.7 | 90.5 | 86.6 | 88.0 | 85.7 | 89.5 |
Histidine | 85.5 | 87.4 | 84.9 | 89.6 | 87.0 | 88.5 | 86.2 | 90.2 |
Isoleucine | 88.7 | 89.3 | 88.0 | 90.8 | 88.2 | 88.9 | 87.6 | 90.5 |
Leucine | 88.2 | 89.0 | 87.6 | 90.3 | 87.8 | 89.6 | 86.4 | 90.6 |
Lysine | 85.0 | 88.4 | 84.3 | 90.0 | 84.5 | 89.8 | 83.7 | 90.4 |
Methionine | 87.5 | 90.1 | 86.8 | 90.6 | 88.6 | 89.1 | 87.4 | 90.5 |
Phenylalanine | 89.1 | 90.3 | 88.5 | 90.9 | 89.5 | 90.0 | 88.9 | 91.0 |
Proline | 86.8 | 88.0 | 85.9 | 89.4 | 86.4 | 87.2 | 86.0 | 89.2 |
Hydroxyproline | --- | --- | --- | 88.7 | --- | --- | --- | 88.4 |
Serine | 88.4 | 90.2 | 87.5 | 91.1 | 88.6 | 89.0 | 87.9 | 90.6 |
Threonine | 85.2 | 86.5 | 84.8 | 89.3 | 84.9 | 86.8 | 84.3 | 88.5 |
Tryptophan | 86.0 | 87.2 | 85.3 | 89.0 | 85.2 | 88.1 | 84.6 | 89.7 |
Tyrosine | 88.5 | 89.6 | 88.0 | 91.4 | 89.0 | 90.2 | 88.2 | 91.0 |
Valine | 88.2 | 89.8 | 87.6 | 90.7 | 87.1 | 88.7 | 86.1 | 90.3 |
- 1Except for glycine, all amino acids are L-isomers. Broiler chickens (21-wk-old). Ileal digestae were obtained from 21-d-old broiler chicks [92] at 6 h after they were fed either a nitrogen-free purified diet (consisting of 94.9% cornstarch, 2% soybean oil, 1.65% dicalcium phosphate, 0.5% vitamin premix, 0.5% mineral premix, 0.25% NaCl, and 0.2% chromic oxide) or a diet containing the test feed ingredient (consisting of 79.9% cornstarch, 15% test ingredient, 2% soybean oil, 1.65% dicalcium phosphate, 0.5% vitamin premix, 0.5% mineral premix, 0.25% NaCl, and 0.2% chromic oxide) and then euthanized by cervical dislocation. The amount of the diet was provided to overnight (16 h)-fasted chicks at 25 g/kg body weight. Amino acids in the diet, as well as the digestae from chicks fed either the nitrogen-free purified diet or the diet containing the test feed ingredient were analyzed as described by Li et al. [91, 94] to calculate the true ideal digestibilities of AA [2]. Data are means for 8 chicks per ingredient, with pooled SEM values being less than 0.8%.
- 2Pigs (50- to 65-d-old). Ileal digestae were obtained from 50- to 65-d-old cannulated pigs [93] at 6 h after they were fed either a nitrogen-free purified diet (consisting of 94.9% cornstarch, 2% soybean oil, 1.65% dicalcium phosphate, 0.5% vitamin premix, 0.5% mineral premix, 0.25% NaCl, and 0.2% chromic oxide) or a diet containing the test feed ingredient (consisting of 79.9% cornstarch, 15% test ingredient, 2% soybean oil, 1.65% dicalcium phosphate, 0.5% vitamin premix, 0.5% mineral premix, 0.25% NaCl, and 0.2% chromic oxide). The amount of the diet was provided to overnight (16 h)-fasted pigs at 12 g/kg body weight. Amino acids in the diet, as well as the digestae from pigs fed either the nitrogen-free purified diet or the diet containing the test feed ingredient were analyzed as described by Li et al. [91, 94] to calculate the true ideal digestibilities of AA [2]. Data are means for 6 pigs per ingredient, with pooled SEM values being less than 1.2%.
