Table 1.
Ingredient and composition of feeds used for in vitro fermentation
| Items | CP levels in concentrate (%) | Roughage to concentrate ratios | ||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| 10 | 13 | 16 | 19 | |||||
| Ingredient (% fresh basis) | ||||||||
| Rice straw | 80 | 60 | 40 | 20 | ||||
| Concentrate1 | 20 | 40 | 60 | 80 | ||||
| Rice bran | 35.0 | 33.0 | 33.0 | 33.0 | ||||
| Maize | 32.5 | 30.0 | 30.0 | 30.0 | ||||
| Cassava powder | 30.0 | 29.0 | 25.0 | 17.0 | ||||
| Fish meal | 0.0 | 5.0 | 8.5 | 16.5 | ||||
| Urea | 0.5 | 1.0 | 1.5 | 1.5 | ||||
| Salt | 1.0 | 1.0 | 1.0 | 1.0 | ||||
| Premix vitamin-mineral2 | 1.0 | 1.0 | 1.0 | 1.0 | ||||
| Chemical composition (% DM) | ||||||||
| DM | 87.3 | 89.5 | 89.3 | 88.6 | 89.7 | 89.6 | 89.5 | 89.4 |
| OM | 94.6 | 93.5 | 91.7 | 89.2 | 88.0 | 88.9 | 89.9 | 90.8 |
| CP | 10.1 | 13.2 | 16.9 | 20.2 | 7.53 | 9.86 | 12.2 | 14.6 |
| NDF | 21.8 | 19.2 | 22.9 | 18.4 | 62.8 | 52.8 | 42.9 | 32.9 |
| Ash | 5.5 | 6.5 | 8.3 | 10.8 | 12.0 | 11.1 | 10.1 | 9.2 |
| GE (MJ/kg DM) | 18.1 | 18.1 | 18.1 | 18.1 | 17.6 | 17.7 | 17.9 | 18.0 |
1
Concentrate consisting of 33% rice bran, 30% maize meal, 25% cassava powder, 8.5% fish meal, 1.5% urea, 1% salt, and 1% premix vitamin-mineral.
2
Premix vitamin-mineral (per kg): 3,600,000 UI vitamin A; 300,000 UI vitamin D3; 4,000 mg vitamin E; 500 mg vitamin B1; 1,000 mg vitamin B2; 650 mg vitamin B6; 6 mg vitamin B12; 12,000 mg vitamin C; 300 mg vitamin K3; 16 mg biotin; 100 mg folic acid; 2,500 mg vitamin B5; 5,000 mg niacin; 40,000 mg Cholin chloride (Fe, Zn, Cu, Mn, Mg).