Dry matter intake (DMI) and the apparent digestibility of DM, CP, ADF, NDF,Ca and P are not affected significantly by different dietary CP levels;

• 日粮不同粗蛋白质水平对围产期奶牛干物质采食量(DMI)影响差异不显著； 对DM、CP、ADF、NDF、Ca、P的表观消化率影响差异不显著；