Effect of Parity Order and Lactation Stage on Physico-Chemical Properties of Anglo Nubian X Etawah Grade Goat Milk

Abstract

Many crossbreeding program in dairy goat has been done to increase milk production. Knowing physico-chemical properties of goat milk is important to understand its quality. A preliminary study was conducted to investigate effect of parity and lactation stage on physico-chemical properties of goat milk in F1 Anglo Nubian x Etawah Grade goats.  The study was done in the Dairy Goat Unit, Indonesian Research Institute for Animal Production. About 540 milk samples collected for 5 months of lactation from 27 does consisted of 3 parities were used in this study. Parameters of physico-chemical properties of milk observed were fat, protein, lactose, total solid, pH, density, freezing point, temperature and salt. All parameters observed were significantly affected by parity order (P<0.05), except temperature, density and pH. Stage of lactation affected significantly fat, total solid and density (P<0.05). First parity and early lactation showed lowest fat and total solid (P<0.05). Across parities and lactation stage, physico-chemical properties of Anglo Nubian x Etawah grade goat milk met the requirement of National Standard of goat milk.