Influence of toxic load on milk producing ability

Abstract

Abstract The purpose of this study was to assess the impact of the total toxic load on milk producing ability of Holstein cows in the Vologda region. Samples of animal hair were studied by atomic emission and mass spectral analysis with inductively coupled plasma to determine the concentrations of chemical elements. Depending on the toxic load factor, the animals were divided into two groups: with a lower and higher coefficient relative to the studied sample. Evaluation of productivity was carried out on the materials accumulated in breeding enterprises during the control milking operation. The analysis of the results of the content of chemical elements in the wool of dairy cows revealed that animals with a high toxicity coefficient had statistically significantly higher values of Cu, Fe, Mn, Pb, Al, Ni, and V. There was a tendency toward higher rates of elements such as As, Cd, Hg, Sr, Zn, B, Ca, Co, Cr, I, Li, Mg, Na, P, Se, Si and Sn. It was found that with an increase in the toxic load on the animal organism, milk productivity decreases.