The last diets were formed by supplementation of compound enzyme addition and acidifier addition, reduced approximately 10% crude protein (CP) level and main essential amino acids (EAA).

• 通过调整乳清粉与蔗糖含量，设计主要营养成分含量相同的三种日粮，再通过增加酸化剂或酶制剂的办法，降低10%25日粮CP和主要氨基酸水平，设计第四种日粮。