and;
Technology;
Group,;
Beijing;
University;
of;
Agriculture,;
Beijing;
102206,;
China;
of;
Animal;
Husbandry;
and;
Veterinary,;
Beijing;
Vocational;
College;
of;
Agriculture,;
Beijing;
102442,;
China;
of;
Animal;
Science;
and;
Technology,;
Beijing;
University;
of;
Agriculture,;
Beijing;
102206,;
China;
复合预混料; 荷斯坦奶牛; 牛奶质量; 产奶性能; 生物; 基础日粮; 日产奶量; 奇偶校验;