Veterynarna biotehnologija – Veterinary biotechnology, 2019, 35, 53-62 [in Ukrainian]. https://doi.org/10.31073/vet_biotech35-07
National University of Life and Environmental Sciences of Ukraine
Institute of Veterinary Medicine NAAS
CORRELATION OF COPPER CONTENT IN THE BLOOD OF COWS WITH TONUS OF THE AUTONOMIC NERVOUS SYSTEM
Introduction. Normally, the sympathetic and parasympathetic nervous systems are constantly in an active state, and the value of this basal activity is defined as the sympathetic and parasympathetic tonus of the autonomic nervous system. It allows one system both increase and decrease activity of an innervated organ. Sympathetic tonus maintains long-term secretion of adrenaline and norepinephrine by the adrenal glands, which increase significantly with extreme effect on organism and decreases in dormancy. In this state, the tonus of the parasympathetic vagus fibers on the heart prevails. Copper is an important component of mineral nutrition and belongs to biotics, the lack of which leads to significant metabolic disorders.
The goal of the work was to determine the content of copper in the blood of cows with different vegetative status.
Materials and methods. The research was carried out on Ukrainian white-and-black cattle of the 2-3rd lactation. The tonus of the autonomic nervous system of cows was determined using a trigeminovagal reflex. According to obtained results, the animal was classified as normotonics, sympathicotonics or vagotonics. For the research we used animal blood samples obtained from the jugular vein in the morning before feeding. Blood sampling was performed twice, in summer and winter. In whole blood, serum, and blood cells, the copper content was determined by flame atomic absorption spectrophotometry.
Results of research and discussion. The results of the copper content in the blood of cows with different vegetative status are presented. In animals with different tonus of the autonomic nervous system, the copper content in various blood fractions was within physiological limits. Thus, the metal content in whole blood, serum and blood cells of cows, depending on the tonus of the autonomic nervous system and season, was 71-84 μg/100 ml, 100-109 μg/100 ml and 57-66 μg/100 ml, respectively. In the blood cells of sympathicotonic cows in both warm and cold seasons, the copper content in blood cells was significantly lower than that in normotonics, respectively by 9.4% (p <0.05) and 12.4% (p <0.001). It was established that the vegetative status of cows significantly influences the copper content only in blood cells: F = 8.59> FU = 4.41; p <0.01, while, season limits the copper content only in whole blood – F = 12.12> FU = 3.55; p <0.01.
Keywords: cows, higher nervous activity, copper, autonomic nervous system.