Effects of Non-Genetic Influential Factors on Service Period Length in Romanian Brown Breed

The aim of the current research was to determine the influence of calving year, season of calving, lactation parity and calving ease on service period (SP) length in Romanian Brown breed. A total of 750 data recorded from 150 lactations of 50 Romanian Brown cows raised between 2018 and 2020 were included in the current study. Year of calving (P≤0.05), lactation parity (P≤0.01) and calving ease (P≤0.001) were related to the service period length. A comparable length of the service period was noted according to season of calving (P>0.5). Concluding, year of calving and calving ease were the main influential factors for this particularly reproductive trait. In this respect, additional studies should be performed in order to include other factors and validate their influence.