Items | Treatmentsc | SEM | P-value | ||
---|---|---|---|---|---|
Control | Arg group | Ala group | |||
Feed intake, kg DM/d | 21.69 | 22.33 | 22.82 | 0.90 | 0.48 |
Milk yield, kg/d | 25.45b | 28.16a | 25.95b | 0.92 | 0.03 |
Milk fat, % | 4.42 | 4.19 | 4.09 | 0.14 | 0.09 |
Milk protein, % | 3.04b | 3.17a | 3.11b | 0.03 | < 0.01 |
Solids nonfat, % | 8.81 | 8.73 | 8.75 | 0.21 | 0.93 |
Milk fat yield, g/d | 1125.88 | 1179.80 | 1064.26 | 61.92 | 0.22 |
Milk protein yield, g/d | 774.97b | 893.95a | 805.80b | 31.38 | 0.01 |
Solids nonfat yield, g/d | 2241.28 | 2458.33 | 2271.29 | 101.66 | 0.11 |
Milk efficiencyd | 1.12b | 1.30a | 1.17b | 0.06 | 0.03 |