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KRACMAR, S., BUŇKA, F., HOZA, I., CECHOVA, L., VALASEK, P.: Changes in amino acids composition of cows colostrum (during fi rst 72 hours after parturition). Acta univ. agric. et silvic. Mendel. Brun., 2007, LV, No. 1, pp. 81–94 Changes in amino acid spectrum of colostrum within the period of 2 to 72 hours post partum were studied in dairy cows of the Czech Red Pied cattle with a genetic admixture of Black Pied Lowland breed (n = 10). Five of them were on the 1st lactation and 5 on the 2nd and/or higher lactations. Within the study period, the contents of non-essential amino acids (NEAA) and essential amino acids (EAA) decreased by 22.8–63.2% and 27.3–65.2%, resp., in dairy cows on the 1st lactation while in those on the 2nd and following lactations the corresponding values were 22.0–63.7% and 24.9–71.7%, respectively. The dependence of the course of changes in the AA spectrum of cow’s colostrum on the time interval elapsing after the parturition could be characterised by a regression equation y = b 0 + b 1 /x + b 2 /x 2 .

Changes in amino acids composition of cows colostrum (during first 72 hours after parturition)