Relationship of Lactation Period Between Colostrum Production and Colostrum Fat on Friesian Holstein Crossbred

Abstract

The aim of this study was to determine relationship of lactation period with colostrum production and colostrum fat in Friesian Holstein crossbred in rural area of KPSP Setia Kawan, Nongkojajar, Pasuruan. A total of 37 dairy cow pasca partus consisting of different lactation period (1-4) were observed directly with case study method and analyzed using regression and correlation. The results showed that the colostrum production regression equation was Y = 5,286 + 0.432X and R 2 = 0.613 and the colostrum fat regression equation was Y = 7,090-0.323X and R 2 = 0.255. The average production of colostrum dairy cows is highest in the fourth lactation (6.92 ± 0.30 L/cows/day) and colostrum fat is highest in the first lactation (6.68 ± 0.79 L/cows/day). The lactation period significantly affected colostrum production and fat.