Activity of alkaline phosphatase in cattle blood plasma according to stage of pregnancy

Abstract

The project was aimed at determining physiological values in activity of alkaline phosphatase (ALP) in different stages of the reproduction cycle of cows. Blood samples were collected from the two herds (organic and conventional) over a period of two years. In both, the organic (A) and conventional herds, the highest ALP activity was found in cows pregnant for more than 140 days. Statistically significant differences were found only in the organic herd, specifically between the group of cows pregnant for more than 140 days and the group of cows after calving (P < 0.05) and non-pregnant cows (P < 0.01). Difference between herds A and B was also recorded (P< 0.05).