Table 5.
The effects of grain type and dietary inclusions of sodium metabisulphite (SMBS) and protease on protein (N) disappearance rates (g/bird/day) in four small intestinal segments at 28 days post–hatch.
| Treatments |
Protein (N) disappearance rates, g/(bird·day) |
|||||
|---|---|---|---|---|---|---|
| Grain | SMBS, g/kg | Protease, units/kg | Proximal jejunum | Distal jejunum | Proximal ileum | Distal ileum |
| Wheat | 0 | 0 | 18.9 | 24.7 | 25.9 | 26.8 |
| 0 | 1,000 | 17.4 | 23.4 | 25.1 | 26.9 | |
| 2.75 | 0 | 17.5 | 23.2 | 25.2 | 26.8 | |
| 2.75 | 1,000 | 16.1 | 21.5 | 23.0 | 27.3 | |
| Sorghum | 0 | 0 | 15.8 | 22.6 | 24.5 | 22.1 |
| 0 | 1,000 | 15.7 | 21.4 | 23.5 | 25.4 | |
| 2.75 | 0 | 18.2 | 23.2 | 25.7 | 23.5 | |
| 2.75 | 1,000 | 14.0 | 24.5 | 25.4 | 24.0 | |
| SEM | 1.2541 | 1.0362 | 1.2330 | 1.0415 | ||
| Main effects grain | ||||||
| Wheat | 17.5 | 23.2 | 24.8 | 27.0b | ||
| Sorghum | 15.9 | 22.9 | 24.8 | 23.7a | ||
| SMBS, g/kg | ||||||
| 0 | 16.9 | 23.0 | 24.7 | 25.3 | ||
| 2.75 | 16.5 | 23.1 | 24.8 | 25.4 | ||
| Protease, units/kg | ||||||
| 0 | 17.6 | 23.4 | 25.3 | 24.8 | ||
| 1,000 | 15.8 | 22.7 | 24.2 | 25.9 | ||
| Significance (P-value) | ||||||
| Grain | 0.083 | 0.728 | 0.995 | <0.001 | ||
| SMBS | 0.613 | 0.905 | 0.993 | 0.902 | ||
| Protease | 0.051 | 0.335 | 0.229 | 0.151 | ||
| Grain × SMBS | 0.361 | 0.021 | 0.110 | 0.918 | ||
| Grain × Protease | 0.686 | 0.296 | 0.612 | 0.289 | ||
| SMBS × Protease | 0.261 | 0.518 | 0.825 | 0.421 | ||
| Grain × SMBS × Protease | 0.239 | 0.355 | 0.530 | 0.268 | ||
a,b Means within columns not sharing a common suffix are significantly different at the 5% level of probability.