Influence of plants and the microbial activity on the metal content in soil solutions of a soddy-podzolic soil in a model experiment

The influence of plants and microorganisms on the migration of metals in a soddy-podzolic loamy sandy soil was studied in a simulation experiment. It was shown that the biota has a great influence on the release of metal compounds into the soil and lysimetric solutions. In most cases, the metal content was reliably higher in the variants of the experiment with the presence of biota than in the control. The microorganisms maintained a high concentration of metals in the soil solution in the course of the experiment. The influence of the plants on the metal migration begins from the third week of the experiment as the biomass grows. The dose of the introduced metals also influences the concentration of the elements in the solutions and the ratios of the Me in the soil solutions: Me in the lysimetric solutions. In all the variants of the experiment, the ratios become narrower with the increase in the dose; i.e., the migration of the metals becomes more active. The dose of 7 APC (the approximate permissible concentration) has an inhibiting influence on the activity of the microorganisms and mustard plants.