Table 1 Composition and nutrient levels of the experimental diets (on a dry matter basis)
Items | Treatments | ||
|---|---|---|---|
L | M | H | |
Ingredient | |||
 Chinese wildrye | 12.50 | 12.50 | 12.50 |
 Dry alfalfa hay | 16.50 | 16.50 | 16.50 |
 Corn silage | 21.00 | 21.00 | 21.00 |
 Corn | 12.90 | 18.12 | 27.85 |
 Wheat bran | 12 | 10 | 8.29 |
 Soybean meal | 5 | 4.44 | 4 |
 DDGS a | 5 | 5 | 4.86 |
 Cottonseed meal | 4.02 | 3 | 3 |
 Rice hull powder | 9.08 | 7.44 | 0 |
 Premixb | 2.00 | 2.00 | 2.00 |
 Total | 100.00 | 100.00 | 100.00 |
Nutrient level | |||
 Dry matter (%) | 89.43 | 89.45 | 89.64 |
 Metabolizable energyc(MJ/kg) | 9.34 | 10.08 | 10.88 |
 CPd (%) | 14.09 | 14.06 | 14.12 |
 NDF d (%) | 50.52 | 48.27 | 42.74 |
 ADF d (%) | 35.13 | 33.41 | 29.19 |
 Ash (%) | 7.61 | 6.93 | 5.69 |
 Calcium (%) | 0.97 | 0.94 | 0.92 |
 Phosphorous (%) | 0.46 | 0.46 | 0.46 |