Table 1.
The ingredients and nutrient composition of the basal diet.
| Items | |
|---|---|
| Ingredients, g/kg of DM a | |
| Concentrate b | 419 |
| Stem-flaked corn | 35.8 |
| Sprouting corn bran | 21.9 |
| Cottonseed | 22.8 |
| Fat power | 11.4 |
| Pelleted beet pulp | 13.1 |
| Megalac c | 4.95 |
| Wet brewer grains | 37.3 |
| Alfalfa | 99.0 |
| Oat hay | 21.6 |
| Corn silage | 313 |
| Nutrient composition, % of DM unless otherwise stated | |
| Net energy for lactation d, MJ/kg DM | 7.20 |
| Crude protein | 17.7 |
| Neutral detergent fiber | 28.0 |
| Acid detergent fiber | 15.9 |
| Ether extract | 4.2 |
| Ash | 9.07 |
| Calcium | 0.85 |
| Phosphorus | 0.42 |
a1DM, dry matter.
bThe concentrate was manufactured by Beijing Sanyuan Seed Technology Co., Ltd. (Beijing, China). The concentrate provided (per kg DM basis) 239.1 g CP; 132.0 g NDF; 74.0 gg ADF; 14.1 g Ca; 5.80 g P; 12.0 g K; 5.80 g Mg; 9.90 g Na; 46.25 mg Cu; 80.30 mg Fe; 136.76 mg Zn; 20,530 IU vitamin A; 3,548.5 IU vitamin D; 115.89 IU vitamin E; 21.89 g NaHCO3.
cThe megalac was produced by Volac Wilmar Feed Ingredients, Ltd. (Hertfordshire, United Kingdom).
dNet energy for lactation was calculated according to NRC (22).