Table 1.
Composition and nutrient levels of experimental diets (as fed basis) %
| Item | Experimental diets | |||
|---|---|---|---|---|
| A | B | C | D | |
| Corn | 5.0 | 15.0 | 25.0 | 30.0 |
| Wheat bran | 5.0 | 10.0 | 15.0 | 20.0 |
| Soybean meal | 15.0 | 15.0 | 15.0 | 15.0 |
| Corn germ meal | 5.0 | 5.0 | 5.0 | 5.0 |
| Medicago sativa | 16.5 | 16.5 | 16.5 | 16.5 |
| Soybean straw | 12.0 | 6.0 | 0.0 | 0 |
| Peanut vine | 39.0 | 30.0 | 21.0 | 11.0 |
| Bentonite | 1.0 | 1.0 | 1.0 | 1.0 |
| Salt | 0.5 | 0.5 | 0.5 | 0.5 |
| Vitamin‐mineral premixa | 1.0 | 1.0 | 1.0 | 1.0 |
| Total | 100.0 | 100.0 | 100.0 | 100.0 |
| Nutrient levelsb | ||||
| GE (MJ/kg) | 15.37 | 15.71 | 15.72 | 15.81 |
| Dry matter | 86.72 | 86.29 | 85.49 | 84.39 |
| Crude protein | 16.47 | 16.83 | 16.86 | 16.94 |
| Ether extract (EE) | 2.73 | 2.56 | 2.44 | 2.32 |
| Crude fiber | 22.37 | 18.46 | 14.32 | 10.03 |
| Neutral detergent fiber (NDF) | 41.84 | 37.36 | 31.72 | 25.24 |
| Acid detergent fiber (ADF) | 25.39 | 23.08 | 20.70 | 17.51 |
| Acid detergent lignin (ADL) | 7.88 | 6.90 | 6.10 | 5.19 |
| Ash | 10.28 | 9.35 | 8.20 | 7.30 |
| Ca | 0.94 | 0.95 | 0.84 | 0.81 |
| P | 0.75 | 0.80 | 0.71 | 0.73 |
a
Premix provided the following per kg of diets: VA 8000 IU; VD 31,000 IU; VE 50 mg; Lys 1.5 g; Met 1.5 g; Cu 50 mg; Fe 100 mg; Mn 30 mg; Mg 150 mg; I 0.1 mg; Se 0.1 mg.
b
Nutrient levels were measured values.