Table 2.
Ingredient composition and nutrient content of wheat straw (WS), soybean hulls (SBH), and corn distiller's dried grains with solubles (DDGS) diets, DM basis
| WS | SBH | Corn DDGS | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Item | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Ingredient composition, % | |||||||||
| WS | 23.00 | 23.00 | 23.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| SBH | 0.00 | 0.00 | 0.00 | 30.00 | 30.00 | 30.00 | 0.00 | 0.00 | 0.00 |
| Corn DDGS | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 55.00 | 55.00 | 55.00 |
| Spray-dried plasma | 4.73 | 4.73 | 4.73 | 4.73 | 4.73 | 4.73 | 4.73 | 4.73 | 4.73 |
| Cornstarch | 61.10 | 61.10 | 61.10 | 56.66 | 56.66 | 56.66 | 34.73 | 34.73 | 34.73 |
| Casein | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 |
| Fish meal, menhaden | 6.74 | 6.74 | 6.74 | 3.77 | 3.77 | 3.77 | 0.00 | 0.00 | 0.00 |
| Titanium dioxide | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 |
| Dicalcium phosphate (18.5%) | 0.00 | 0.00 | 0.00 | 0.30 | 0.30 | 0.30 | 0.00 | 0.00 | 0.00 |
| Limestone | 0.32 | 0.32 | 0.32 | 0.44 | 0.44 | 0.44 | 1.44 | 1.44 | 1.44 |
| Sodium chloride | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 |
| Vitamin–trace mineral premix1 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 |
| Total | 99.99 | 99.99 | 99.99 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 |
| Analyzed nutrient composition, DM basis | |||||||||
| GE, kcal/kg | 4,160 | 4,169 | 4,174 | 4,106 | 4,105 | 4,099 | 4,517 | 4,480 | 4,429 |
| CP, % | 13.00 | 13.60 | 12.40 | 13.20 | 13.70 | 13.10 | 22.20 | 24.00 | 23.00 |
| EE,2 % | 2.90 | 2.60 | 3.10 | 2.40 | 2.50 | 2.30 | 6.30 | 6.30 | 6.00 |
| ADF, % | 12.40 | 12.50 | 13.00 | 15.30 | 13.90 | 14.70 | 8.60 | 10.00 | 7.70 |
| NDF, % | 22.20 | 23.50 | 26.90 | 21.30 | 19.80 | 23.50 | 18.70 | 19.60 | 20.40 |
| TDF,3 % | 23.00 | 23.40 | 21.40 | 24.70 | 23.20 | 25.00 | 20.70 | 20.90 | 18.30 |
| Lignin, % | 2.20 | 2.30 | 2.20 | 0.80 | 0.90 | 1.50 | 2.00 | 2.80 | 2.10 |
| Hemicellulose,4 % | 9.70 | 11.00 | 13.90 | 6.00 | 5.90 | 8.80 | 10.00 | 9.60 | 12.70 |
| Cellulose,4 % | 10.30 | 10.20 | 10.80 | 14.50 | 13.00 | 13.20 | 7.00 | 7.20 | 5.60 |
| Titanium, % | 0.33 | 0.33 | 0.30 | 0.27 | 0.33 | 0.28 | 0.35 | 0.38 | 0.37 |
| Bulk density, g/cm3 | 0.37 | 0.42 | 0.40 | 0.64 | 0.61 | 0.60 | 0.67 | 0.68 | 0.67 |
The vitamin and trace mineral premix provided the following (per kg of diet): 3,527,392 IU vitamin A, 661,386 IU vitamin D3, 13,228 IU vitamin E, 1,323 mg vitamin K (menadione dimethylpyrimidinol bisulfite), 2,205 mg riboflavin, 13,228 mg niacin, 8,818 mg pantothenic acid, 13 mg vitamin B12, 119 mg iodine (ethylenediamine dihydroiodide), 119 mg selenium (selenite), 22,046 mg organic zinc, 13,228 mg organic iron, 454 mg organic manganese, and 1,543 mg organic copper.
EE = ether extract with acid hydrolysis.
TDF = total dietary fiber.
Hemicellulose was calculated as NDF − ADF and cellulose was calculated as ADF − lignin.