Table 4.
Basal ileal losses (g/kg DMI) and true ileal digestibility estimated by regression 1
| |
BEL
2
|
TID
3
|
R
2
(5)
|
||
|---|---|---|---|---|---|
| a | S.D. 4 | b | S.D. | ||
| Protein |
16.95 |
3.69 |
97.8 |
0.3 |
0.99 |
| Essential amino acids |
|
|
|
|
|
| Arginine |
1.36 |
0.26 |
99.0 |
3.8 |
0.98 |
| Histidine |
0.18 |
0.10 |
93.0 |
1.9 |
0.99 |
| Lysine |
0.60 |
0.16 |
99.4 |
1.1 |
0.99 |
| Isoleucine |
0.64 |
0.17 |
98.0 |
1.8 |
0.99 |
| Leucine |
0.98 |
0.19 |
99.5 |
1.1 |
0.99 |
| Valine |
0.81 |
0.18 |
98.4 |
1.5 |
0.99 |
| Methionine |
0.35 |
0.09 |
97.0 |
9.0 |
0.99 |
| Phenylalanine |
0.63 |
0.10 |
100.2 |
1.0 |
0.99 |
| Threonine |
0.96 |
0.21 |
96.0 |
2.6 |
0.99 |
| Non essential amino acids |
|
|
|
|
|
| Alanine |
0.99 |
0.20 |
97.2 |
3.5 |
0.98 |
| Aspartic acid |
1.25 |
0.26 |
97.1 |
2.1 |
0.99 |
| Cystine |
0.30 |
0.07 |
95.3 |
4.8 |
0.96 |
| Glutamic acid |
2.18 |
0.69 |
97.1 |
1.7 |
0.99 |
| Glycine |
0.95 |
0.13 |
99.3 |
3.4 |
0.98 |
| Proline |
0.97 |
0.27 |
98.1 |
1.6 |
0.99 |
| Serine |
0.91 |
0.26 |
95.0 |
2.6 |
0.99 |
| Tyrosine | 0.55 | 0.09 | 100.1 | 1.0 | 0.99 |
1 According to equation: Y = a + bX.
2BEL Basal endogenous losses (a = intercept, protein or amino acids endogenous losses at ileal level).
3TID True ileal digestibility (b = slope, proportion of protein or amino acid that disappeared in the digestive tract, per protein or amino acid unit intake).
4SD Standard deviation of the intercept (a) or slope (b).
5R2 Coefficient of determination for regression straight line.