Table 1.
Diet composition and nutrient composition of basal diet in the experiment.
| Item | Content |
|---|---|
| Ingredient, % of DM | |
| Corn silage | 31.87 |
| Alfalfa hay | 21.02 |
| Oat hay | 3.75 |
| Cottonseed | 3.69 |
| Corn grain, coarsely ground | 17.43 |
| Soybean meal | 5.57 |
| Urea | 0.34 |
| Wheat bran | 3.74 |
| DDGS | 1.53 |
| BSG | 1.82 |
| Malt hulls | 1.49 |
| Sprayed corn barn | 1.87 |
| Corn germ meal | 3.76 |
| Premix1 | 2.12 |
| Total | 100.00 |
| Chemical composition2, % of DM | |
| DM | 48.63 |
| CP | 18.60 |
| EE | 5.96 |
| NDF | 31.15 |
| ADF | 12.03 |
| NEL, Mcal/kg | 1.49 |
| Isoflavone analysis, mg/kg | |
| Formononetin | Undetectable |
| Biochanin A | Undetectable |
| Genistein | 166.13 |
| Daidzein | 75.00 |
DDGS = dried distiller's grains with solubles; BSG = brewer's spent grains; DM = dry matter; EE = ether extract; CP = crude protein; NDF = neutral detergent fiber; ADF = acid neutral detergent fiber; NEL = net energy for lactating.
1
Contained the following per kilogram of premix (DM basis): 4 g of Ca; 5.5 g of P; 2 g of Na; 4 g of Mg; 30 mg of Cu; 25 mg of Fe; 140 mg of Mn; 140 mg of Zn; 0.8 mg of Se; 40,000 IU of vitamin A; 37,000 IU of vitamin D; 500 IU of vitamin E.
2
NEL was calculated according to NRC (2001), the other indicators were measured values.