This part of DB53/T 447 specifies the technical requirements for the selection of breeding bulls for artificial insemination of BMY cattle, the age of first mating and estrus identification of cows, insemination methods, and pregnancy diagnosis of cows. This section applies to artificial insemination of BMY cattle.
DB53/T 447.3-2012 history
2022DB53/T 447.3-2022 Yunling Cattle Part 3: Artificial Insemination
2012DB53/T 447.3-2012 BMY Cattle Part 3: Technical Specifications for Artificial Insemination