Liu, Ruili
Liu, Xianxun
Bai, Xuejin
Xiao, Chaozhu
Dong, Yajuan
Funding for this research was provided by:
Shandong modern agricultural industry technology system cattle industry innovation team (668-2216030)
Article History
Received: 11 December 2019
Accepted: 2 December 2020
First Online: 14 December 2020
Competing interests
: The authors declare no competing interests.