Abstract
Using the approach of calculation the Maximum Acceptable Toxicant Concentration, the calculation of Phyto Maximum Allowable Concentration of metal in soil (1N HCl) (on the example of agroecosystem of spring barley) was proposed. Using the probit analysis, the phytolethal dose decreasing 5% of biomass was obtained. Metal concentration in unpolluted soil, and Phytoletal Dose which causes the 5% reduction of biomass were obtained for calculation of Phyto Maximum Allowable Concentration of metal in soil. Phyto Maximum Allowable Concentration of each metal in soil (1N HCl) was highlighted. The highest value of Phyto Maximum Allowable Concentration was for zinc, the least — for cadmium. According to the Phytolethal Dose decreasing 5% of biomass the metals are arranged in the row: Cd > Ni > Co > Cu > Pb > Zn (sod podzolic soil), Cd > Cu > Ni > Co > Pb > Zn (chernozem).
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