Table 1.
Ingredients and nutrient composition of the diets in each group (%, Ingredient composition with air dried basis and nutrient composition with DM basis)
| Items | Treatments1 | |||
|---|---|---|---|---|
|
| ||||
| A | B | C | D | |
| Ingredient composition | ||||
| Corn straw | 70.00 | 60.00 | 50.00 | 40.00 |
| Corn | 18.00 | 24.00 | 30.00 | 36.00 |
| Wheat bran | 4.50 | 6.00 | 7.50 | 9.00 |
| Soybean meal | 3.65 | 4.86 | 6.08 | 7.30 |
| Corn protein powder | 1.15 | 1.53 | 1.92 | 2.30 |
| Rapeseed meal | 1.50 | 2.00 | 2.50 | 3.00 |
| Calcium carbonate | 0.33 | 0.44 | 0.56 | 0.67 |
| Calcium hydrogen phosphate | 0.20 | 0.27 | 0.34 | 0.40 |
| Sodium sulphate | 0.13 | 0.18 | 0.22 | 0.26 |
| Sodium bicarbonate | 0.15 | 0.20 | 0.25 | 0.29 |
| Salt | 0.20 | 0.27 | 0.34 | 0.40 |
| Choline chloride | 0.02 | 0.03 | 0.04 | 0.04 |
| Mineral-vitamin premix2 | 0.17 | 0.22 | 0.28 | 0.34 |
| Nutrient composition | ||||
| DM | 83.33 | 84.39 | 85.45 | 86.50 |
| CP | 9.13 | 10.50 | 11.86 | 13.22 |
| Ether extract | 2.10 | 2.37 | 2.64 | 2.90 |
| NDF | 53.84 | 48.36 | 42.88 | 37.40 |
| ADF | 32.89 | 29.11 | 25.33 | 21.54 |
| Ash | 5.83 | 5.42 | 5.01 | 4.60 |
| Calcium | 0.50 | 0.53 | 0.56 | 0.59 |
| Phosphorus | 0.37 | 0.40 | 0.44 | 0.47 |
DM, dry matter; CP, crude protein; NDF, neutral detergent fiber; ADF, acid detergent fiber.
1
Treatments were: A, F:C = 70:30; B, F:C = 60:40; C, F:C = 50:50; D, F:C = 40:60.
2
Provided per kilogram of complete diet: vitamin A 1,500 IU; vitamin D 550 IU; vitamin E 10 IU; Fe (as ferrous sulfate) 20 mg; Mn (as manganese sulfate) 40 mg; Zn (as zinc sulfate) 30 mg; I (as potassium iodide) 0.50 mg; Se (as sodium selenite) 0.30 mg; Co(Cobalt chloride).