Table 5.
Metabolizable energy (ME) and apparent total tract digestibility (ATTD) of crude protein in various feedstuffs fed to growing pigs with or without β-mannanase
| Item | β-mannanase (U/kg of feed)1) | SEM | p-value | |
|---|---|---|---|---|
|
| ||||
| 0 | 800 | |||
| ME (kcal/kg) | ||||
| Barley | 3,218 | 3,553 | 96 | 0.030 |
| Copra meal | 3,048 | 3,161 | 69 | 0.276 |
| Corn | 3,217 | 3,212 | 29 | 0.906 |
| Corn DDGS | 3,462 | 3,468 | 38 | 0.905 |
| Palm kernel meal | 2,751 | 3,091 | 82 | 0.015 |
| Sorghum | 3,262 | 3,457 | 55 | 0.047 |
| Soybean meal | 3,336 | 3,432 | 32 | 0.049 |
| Wheat | 3,197 | 3,207 | 32 | 0.826 |
| ATTD of CP (%) | ||||
| Barley | 70.5 | 74.0 | 1.6 | 0.156 |
| Copra meal | 59.3 | 64.5 | 1.8 | 0.061 |
| Corn | 77.8 | 77.9 | 1.0 | 0.952 |
| Corn DDGS | 66.3 | 68.9 | 1.5 | 0.248 |
| Palm kernel meal | 47.1 | 55.6 | 2.5 | 0.035 |
| Sorghum | 73.6 | 75.3 | 1.4 | 0.324 |
| Soybean meal | 84.4 | 87.2 | 1.7 | 0.219 |
| Wheat | 81.6 | 82.3 | 1.9 | 0.635 |
ME, metabolizable energy; DDGS, distillers dried grains with solubles; ATTD, apparent total tract digestibility; CP, crude protein.
1)
One unit (U) of β-mannanase activity is defined as the amount of enzyme required to releases 1 μmole of mannose reducing sugars equivalents per minute from locust bean gum (1.0%) in sodium phosphate buffer (200 mmol/L), pH 6.0 at 50°C.