PSXI-1 - Influence of Concentrations of Essential and Toxic Elements in Semen on Qualitative Characteristics of Sperm of Holstein Bulls

Many studies show that an excess or deficiency of chemical elements in an animal's body can lead to a number of reproductive disorders. In this regard, the aim of this study was to assess the influence of concentrations of essential and toxic elements in semen on qualitative characteristics of semen of sire bulls. The studies were carried out on Holstein bulls at the age of 3-4 years (n = 65). Sperm concentration (billions) was estimated using a digital photometer (IMV Technologies). Sperm activity (score) was studied using a phase contrast microscope (Nikon ECLIPSE E400, Tokyo, Japan). The elemental composition of the semen was determined by 25 chemical elements (Al, As, B, Ca, Cd, Co, Cr, Cu, Fe, I, K, Li, Mg, Mn, Na, Ni, P, Pb, Se, Si, Sn, Hg, Sr, V, Zn) by ICP-AES and ICP-MS. Coefficients were calculated according to Spearman’s correlation. As a result of the research, it was found that sperm activity negatively correlated (r = -0.47; P ≤ 0.05) with the Pb content in semen and had a positive correlation with Zn concentrations (r = 0.55; P ≤ 0.05); Se (r = 0.64; P ≤ 0.05); P (r = 0.67; P ≤ 0.05). Sperm concentration was positively correlated with Cu levels (r = 0.55; P ≤ 0.05); P (r = 0.76; P ≤ 0.05); Se (r = 0.66; P ≤ 0.05). Thus, the results of the carried out studies indicate a high degree of relationship between the content of essential and toxic elements in semen and main qualitative characteristics of sperm. A deeper study of the role of chemical elements in reproductive function can be useful in overcoming the problem of low reproductive capacity of sires. The studies were carried out in accordance with the research plan for 2019-2021. FSBSI Federal Research Centre BST RAS (No. 0761-2019-0006)