Analysis of Culling Characteristics and Influencing Factors of Longevity in Holstein Cows in Ningxia
ZHANG Hailiang, CHEN Ziwei, SHI Rui, TIAN Jia, GAO Xuhong, WEN Wan, WANG Yachun
China Animal Husbandry and Veterinary Medicine . 2021, (1): 200 -208 .  DOI: 10.16431/j.cnki.1671-7236.2021.01.022