HUBUNGAN ANTARA BOBOT BADAN INDUK DAN UKURAN AMBING TERHADAP PRODUKSI KOLOSTRUM PADA SAPI PERAH FRIESIAN HOLSTEIN DI PT GREENFIELDS INDONESIA 2

Colostrum production is greatly influenced by internal factors (genetics) and external factors (feed and environment). Colostrum is produced from the secretions of the udder/mammary glands after the animal gives birth. This study aims to determine the relationship between body weight and udder size on colostrum production in Holstein Friesian dairy cows. This research was carried out at PT. Greenfields Indonesia 2 Blitar Regency, East Java. The material was 100 post-calving Holstein Friesian cows in the I-V lactation phase. Parameters measured include udder depth, height, width, length, body weight, and colostrum production. The measurement was done using a measuring tape and measuring cup for colostrum production measurement. The measurement results obtained body weight of 649.48 ± 99.22 cm, udder depth of 43.39 ± 7.56 cm, udder length of 48.14 ± 6.29, colostrum production of 6.53 ± 1.08 liters. Analysis of the relationship between research variables used correlation analysis. In contrast, the form of relationship was sought using multiple and simple linear regression, where body weight and udder size were the independent variables (X) and colostrum production was the dependent variable (Y). The study showed significant results between udder depth and udder length to colostrum production and no significant relationship between udder height, udder width, and body weight to colostrum production. This research concludes that udder depth and udder length are appropriate for predicting colostrum production.