Dynamics of changes in selenium content in soidalnd winter wheat affected by long-term organic fertilization

The objective of this study was to determine the selenium content in soil and its accumulation and distribution in winter wheat plants affected by organic fertilization. There was found a significant effect of FYM application on the total selenium in soil. A supplement of manure at the dose of 80 Mg ha -1 resulted in the significantly highest increase of the total selenium content almost 50 % in soil, as compared with the soil from control plots. The total selenium content in soil was significantly correlated with organic carbon content. The highest selenium concentrations were observed in aboveground biomass of winter wheat gathered from plots treated with FYM with the doses of 20 and 40 Mg ha -1 , which was about 70 % higher in comparison with the control plants. The application of manure in the dose of 80 Mg ha -1 resulted in a decrease in the selenium content in aboveground wheat biomass. The bioaccumulation and translocation coefficients of selenium demonstrated that aboveground winter wheat biomass absorbed and transported selenium more easily from soil treated with FYM at the doses of 20 or 40 Mg ha -1 . Both coefficients decreased considerably due to the highest doses of FYM.