Lipid profile of blood serum of chickens under conditions of long-term exposure to extremely low frequency variable pulsed electromagnetic field

Abstract

It has been proven that electromagnetic fields (EMF) of various intensities have various effects on living organisms – from a therapeutic effect to the appearance of various functional disorders. The purpose of this study was to investigate the pattern of long-term continuous exposure of poultry with extremely low frequency variable pulsed electromagnetic field (ELF-PEMF) of weak intensity on indicators of lipid metabolism in chickens. 150–day-old Tetra X breed chickens were irradiated with ELF-PEMF at a frequency of 8 Hz for about 30 minutes for 174 days. The irradiation regime of experimental groups 1 and 2 was continuous, and in groups 3 and 4 it was alternated with weekly breaks. In 1 experimental group, poultry was fed according to the basic diet with a protein content increased by 10–15 %, and in 2 – with a protein content reduced by 10–15 %. In the control group of non-irradiated poultry, the protein content in the diet corresponded to generally accepted norms. The results of the experiment proved that the irradiation regimes of ELF-PEMF selected by us have an effect on lipid metabolism in the body of Tetra X breed chickens. On the 112th day of the experiment, regardless of the used regimes of irradiation of chickens with ELF-PEMF and the protein level in the diet, in the blood serum of the experimental groups, compared to the control, an increase in the level of free triacylglycerols by 1.56–2.76 times was found; cholesterol level – by 1.04–1.39 times; of high-density lipoproteins (HDL) – by 1.24–1.84 times and the reduction of atherogenic index – by 1.41–1.73 times, which is predicted to have a positive effect on their health and productive qualities. Meanwhile, during longer exposure of chickens to ELF-PEMF, the level of triacylglycerols in the blood serum of experimental groups of chickens did not differ significantly from the indicators of non-irradiated poultry (control group). In general, by selecting different modes of irradiation with ELF-PEMF with different supply of protein in the rations, it is possible to influence the indicators of lipid metabolism of Tetra X breed chickens.