Blood morpho-biochemical indices of Black Pied cows depending on milk production level

Abstract

The research findings on the evaluation of blood hematological and biochemical indices of Black Pied cows depending on their milk producing abilities are discussed. Four groups of 10 Black Pied cows were formed based on different levels of milk producing ability during the last lactation taking into account live weight, total number of lactations and current month of lactation. The concentration of hemoglobin in cows from Group 4 exceeded that of Group 1 by 17.8% or 18 g L (p ≤ 0.05). The cows of Group 2 exceeded the animals of Group 3 in terms of WBC count by 35.4% or 4.0 × 10⁹ L (p ≤ 0.05). The platelet count was higher in cows of Group 1 compared to those of Group 3 by 16.1% or 76.2 × 10⁹ L (p ≤ 0.05). The protein content in blood serum of cows of Group 4 was higher than that of cows of Group 2 by 7.5% or 6.0 g L (p ≤ 0.05). Higher albumin content was found between Groups 1 and 3, and Groups 1 and 4 where the difference was 9.8% or 5.0 g L (p ≤ 0.05) and 17.1% or 7.0 g L (p ≤ 0.01), respectively. The urea level in Group 4 compared to that of Groups 1 and 2 also differed; where the difference amounted to 17.1% or 0.6 mmol L (p ≤ 0.001) and 13.8% or 0.5 mmol L (p ≤ 0.01). In animals of Group 4; the AST level was higher than that in cows of Groups 1 and 2 by 18.1% or 13.0 U L (p ≤ 0.05) and 26.4% or 19.0 U L (p ≤ 0.01), respectively. This index was also higher in Group 3 compared to Group 2 by 19.7%, or 13 U L (p ≤ 0.05).