The NDF, ADF, Ash content and IVDMD were similar, and the EE content increased from 4% to 5%, and the CP content increased from 16.1% to 16.6% and 16.9%. The DMI were not different between dairy cows of six total mixed rations.

• 在NDF、ADF、Ash等含量和IVDMD差异不明显；EE含量从4%25提高到4.；9%25；日粮CP含量从16