Chemical Composition of Bovine Colostrum

摘要

Chemical compositions of bovine colostrum and their change after parturition were studied. Fat, total protein, whey proteins, ash and total solid were higher than those in milk and decreased as lactation time was Increased. Lactose was lower than thatin milk and incrcsed with the increase of lactation time. Whey proteins of colostrum such as Ig, beta-Lg, BSA, Lf and Lp were obviously higher than those in milk and decreased as lactation time was increased. There were high unsaturatcd fatty acids in colostrum compared with bovine milk. Na, Cl, Fe, Zn, Cr and Mg in colostrum were higher than those in milk. They fell as lactation time was increased. I, K, P, Mn and Cu increased with the increase of lactation time. Co, As and Pb were not detected by TCPmethod.