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.: Home > Animal Science Papers and Reports > 2014 > Volume 32 Number 4 > Iwona Radkowska, Eugeniusz Herbut

Hematological and biochemical blood parameters in dairy cows depending on the management system

Iwona Radkowska, Eugeniusz Herbut
National Research Institute of Animal Production, Department of Technology, Ecology and Economics of Animal Production, Krakowska 1, 32-083 Balice, Poland
Abstract :
Monitoring the health of dairy herds is central to the assessment of animal health and welfare. The
aim of this study was to analyse hematological and biochemical parameters in Holstein-Friesian
dairy cows depending on the management system.
Thirty cows from the foundation stock with an average annual yield of 6500-7000 l of milk were
selected for the experiment. The cows were characterized by similar yields and were in a similar
lactation period (second and third lactation). The cows were divided into three groups of 10 cows
each: confined to a barn (control group C), housed in a barn with free access to an outdoor run
(O) and maintained on a pasture (P). Blood samples to determine hematological and biochemical
parameters were collected from animals on an empty stomach before the onset of the experiment and
towards the end of the pasture period. The present study showed a positive effect of pasturing dairy
cows on their hematological parameters. In the group of pasture-fed cows, there were also significant
(P≤0.05) differences between the results before and at the end of the trial. There was a significant
(P≤0.05) increase in total white blood cell count and in basophil and neutrophil percentages. There
were also significant (P≤0.05) increases in the concentration of hemoglobin (by 8%) and hematocrit
(by 7%). Biochemical analysis showed slightly higher urea concentrations in the group of pastured
cows when compared to the other groups. The high content of nitrogen compounds in the pasture
forage could have a certain effect on hepatic nitrogen metabolism, which could increase serum

concentrations of AST and ALT enzymes in cows from group P

Keywords :
blood chemistry / dairy cows / housing systems / morphological parameters

Date Deposited : 02 Apr 2015 13:47

Last Modified : 02 Apr 2015 13:47

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Volume 32, Number 4, - 2014

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