Branch of Animal Husbandry and Veterinary Medicine Heilongjiang Academy of Agricultural Sciences Qiqihar 161005 China;
Technical Identification Station for Agricultural Products and Veterinary Feed in Heilongjiang Province Harbin 150000 China;
Branch of Animal Husbandry and Veterinary Medicine Heilongjiang Academy of Agricultural Sciences Qiqihar 161005 China;
Branch of Animal Science Jilin Academy of Agricultural Sciences Changchun 136100 China;
Branch of Animal Science Jilin Academy of Agricultural Sciences Changchun 136100 China;
Branch of Animal Husbandry and Veterinary Medicine Heilongjiang Academy of Agricultural Sciences Qiqihar 161005 China;
Cattle; Embryo bisection; Blastocyst development rate;