The Effect of Parity on Colostrum Quality of Friesian Holstein Crossbred Cows in Indonesia

A study was conducted to figure out the colostrum quality at first milking from various parity of Friesian Holstein crossbred cows in rural area of Ngantang, Malang Regency, East Java. Colostrum quality was determined using Brix Refractometer (%). Thirty cows from first to fifth parity were used in this study. Each parity consisted of 6 cows. The colostrum samples were taken from first milking of each teat of the cows. The experimental method was using a Nested in Completely Randomized Design with parity as the treatment and teats position were nested to the parity. The data was analyzed using analysis of variance (ANOVA) and if there was a significant difference in the averages it was continued by Duncan's Multiple Range Test (DMRT). The results showed that parity had a significant effect (P< 0.01) on the colostum quality, in which the higher the parity, the better the colostrum quality, from second parity (26.88 ± 1.20% Brix) to fifth parity (29.46 ± 1.68% Brix). However, that of first parity (28.92 ± 1.46% Brix) was higher than second parity. While the teats position were not significantly affect the colostrum quality, but there was a tendency that the rear teats had better colostrum quality than the front teats.