The association of culling and XXXX rate within 30 days after calving with productivity or reproductive performance in dairy herds in Fukuoka, Southern Japan.

@entity204 @entity291 @entity74
UNASSIGNED: The incidence of @entity74 in dairy herds negatively influences productivity and reproductive performance. Concrete data from local areas are helpful for explaining the importance of peripartum management to dairy farmers. This study was conducted to clarify the association of culling and @entity204 rate within 30 days after calving with productivity or reproductive performance in 179 dairy herds in Fukuoka, Southern Japan. A database was compiled from the records of the Livestock Improvement Association of Japan, the Dairy Cooperative Association and the Federation of Agricultural Mutual Relief Association. In this study, we created a comprehensive database of dairy farm production data for epidemiological analysis and used a general linear mixed model to analyze the association of culling and @entity204 rate within 30 days after calving with milk production or reproductive performance. The database can be used to describe, analyze and predict the risk of production. A cross-sectional analysis with contrasts was applied to investigate the association of @entity291 served by AI/all @entity291 , pregnant @entity291 / @entity291 served by AI, days open, milk yield and somatic cell counts with culling and @entity204 rate within 30 days after calving. The days open value significantly increased with increasing rate of culling and @entity204 within 30 days after calving (P for trend <0.001). No significant differences were found for the other comparisons. Our data suggest that proper feeding and management in the dry period may lead to improved postpartum reproductive performance in this dairy @entity291 cohort.
