THE INFLUENCE OF CADMDIUM LOAD ON THE LEVEL OF VITAMINS A AND E IN BLOOD OF LAYING HENS

  • A. Y. Ostapyuk Lviv National University of Veterinary Medicine and Biotechnology named after S. Z. Gzhytskyi 50, Pekarska str., Lviv, 79010, Ukraine
  • B. V. Gutyj Lviv National University of Veterinary Medicine and Biotechnology named after S. Z. Gzhytskyi 50, Pekarska str., Lviv, 79010, Ukraine
Keywords: TOXICOLOGY, CADMIUM SULPHATE, LAYING HENS, VITAMIN A AND E.

Abstract

Cadmium – a heavy metal, classified as a second class of danger, has a pronounced tendency to accumulate in the body. Absorbed cadmium accumulates in the liver as a complex with metallothionein. The aim of the study was to study the effect of Cadmium on the level of vitamins A and E in the blood of laying hens. For research, three groups of poultry were formed: control and two experimental. The control group chickens were on a regular diet, fed with compound feed and drinking water without cadmium sulfate. To drinking water of chickens of experimental groups for 30 days was added cadmium sulfate in doses: the first group – 2 mg/kg, the second group – 4 mg/kg of body weight. The keeping conditions of the chickens and the indoor microclimate parameters for all groups of birds were similar.

After cadmium loading at a dose of 2 mg/kg body weight, the level of vitamin A in the blood of chickens has probably decreased since the 14th day of the experiment. It was the lowest at 21 days of experience. When drinking cadmium sulfate at a dose of 4 mg/kg body weight decreased levels of vitamin A by 4 and 21 days of the experiment, respectively, by 24 and 40% compared with the control group of chickens.

When examining the level of vitamin E in the blood of laying hens under cadmium loading, it was found that in the second experimental group of chickens the level of this vitamin was significantly lower than in the control and the first experimental group of chickens. When compared with the control group of chickens, it was found that on the 14th day of the experiment, the level of vitamin E was lower in the first experimental group by 12% and in the second – by 27%, respectively. At day 21 of the experiment, the level of vitamin E was the lowest in the second experimental group, where it was 0.70 ± 0.011 µg/ml, respectively, which is 44% lower than the control.

A significant decrease in the content of vitamins A and E indicates not only the pathological condition of the liver, but also the enhancement of oxidation processes associated with a decrease in the activity of enzymes of the antioxidant system. Cadmium compounds have high biological activity, they easily form complex compounds with proteins, nucleic acids, which inactivate a number of enzymes.

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Published
2020-06-01
How to Cite
Ostapyuk, A. Y., & Gutyj, B. V. (2020). THE INFLUENCE OF CADMDIUM LOAD ON THE LEVEL OF VITAMINS A AND E IN BLOOD OF LAYING HENS. Scientific and Technical Bulletin оf State Scientific Research Control Institute of Veterinary Medical Products and Fodder Additives аnd Institute of Animal Biology, 21(1), 147-152. https://doi.org/10.36359/scivp.2020-21-1.19