Protein of milk replacers (MR) in A, B and C groups respectively came from isolated soyprotein (ISP) , soy protein concentrate (SPC) and SPC+corn gluten meal (CGM) . The calvesfed milk in D group were taken for the control.

• A 组饲喂以大豆分离蛋白为蛋白源的代乳料，B 组饲喂以大豆浓缩蛋白为蛋白源的代乳料，C 组饲喂以大豆浓缩蛋白+玉米蛋白为蛋白源的代乳料，D组饲喂牛奶作为对照组。