The effect of BCS, PPM, S/C and days open on the calving interval of dairy cows at PT. Ultra Peternakan Bandung Selatan

Abstract

Abstract The calving interval is a key factor in the dairy industry that determines overall milk production and heavily influences management and the environment. This study aims to determine the effect of body condition score (BCS), post-partum mating (PPM), service per conception (S/C), and days open (DO) on calving interval (CI) for dairy cows at PT. Ultra Peternakan Bandung Selatan (UPBS). A total of 99 Friesian Holstein samples were used during their fourth lactation period. The reproduction traits were collected from the UPBS dataset. A linear regression analysis was carried out to evaluate the effect reproduction traits of CI. Furthermore, CI was used as the dependent variable (Y), while BCS, PPM, S/C, and DO were used as the independent (X). The result showed that BCS, PPM S/C, and DO significantly influenced CI (P<0.05). The regression equation obtained in Y = 244,243 – 13,710 X1 + 1,202 X2 + 12,563 X3 + 0,730 X4 + e with a coefficient of determination (R2) of 92,8%. It was concluded that BCS, PPM, S/C, and DO affected the CI of dairy cows at the PT. UPBS.