Protas N. Modeling of mikroelements migration processes in a system soil - plant.

The dissertation is devoted to research of transition processes of microelements from soil to plants. The analysis of concentration relations between the contents of microelements in soil solution, solid phase of soil and adsorbed on the surface of plants root system is held, when nonisotopic chemical analogue is present in soil. The received expression for probability of transition of microelements from soil to plants describes its dependence upon the migration characteristics of microelements in soil and characteristics of plants. The connection between the probability of microelements transition from soil to plants and coefficient of their accumulation in plants is found. It is shown that the dependence of radionuclids accumulating by plants upon the level of radioactive contamination is stipulated by the methods of accumulation coefficient measuring. The received theoretical relations are used for the analysis of accumulation radionuclides by the plants of hemp. The influence of potassium on the processes of radiocesium transition from soil to plants of hemp at their various stages of vegetative development is analyzed. Relative distribution of cesium radionuclides on different vegetative organs of hemp is established.