Table 9.
Correlations between concentrations of free amino acids in the portal circulation and feed conversion ratios of broilers offered wheat-based diets without and with sodium metabisulphite plus protease from 7 to 28 days post–hatch.
| Essential amino acids | Correlation coefficient (r) | Significance (P-value) | Non-essential amino acids | Correlation coefficient (r) | Significance (P-value) |
|---|---|---|---|---|---|
| Arginine | −0.563 | 0.072 | Alanine | −0.157 | 0.644 |
| Histidine | −0.568 | 0.068 | Aspartic acid | −0.019 | 0.956 |
| Isoleucine | −0.643 | 0.033 | Asparagine | −0.606 | 0.048 |
| Leucine | −0.621 | 0.042 | Cystine | −0.329 | 0.322 |
| Lysine | −0.575 | 0.064 | Glutamic acid | +0.295 | 0.379 |
| Methionine | −0.660 | 0.027 | Glutamine | −0.501 | 0.116 |
| Phenylalanine | −0.683 | 0.021 | Glycine | −0.692 | 0.018 |
| Threonine | −0.773 | 0.005 | Proline | −0.802 | 0.003 |
| Tryptophan | −0.247 | 0.464 | Serine | −0.499 | 0.118 |
| Valine | −0.657 | 0.028 | Tyrosine | +0.085 | 0.804 |