Soil biotesting based on fractal characteristics of plants

Intense technological impact on the components of the environment once again explains the need for a detailed analysis of interaction between man and nature. Assessment of the degree of environmental pollution can be based on the reaction of biological test objects to external influences, including such as chemical ones, implemented through the flow of a wide range of pollutants from the soil to the vegetative parts of plants. The aim of the study is to develop new models that increase the informativity of soil biotesting by describing self-organization as a transitional process. One of prospective methods for determining soil pollution is a method of biotesting, in which the dynamics of changes in the structural parameters of the test object is evaluated in time (length of germ, development of root system). In this aspect, fractals have proved to be an extremely convenient mathematical tool for describing the dynamics of the development of a natural object in changing environmental conditions, in which a natural object retains its self-similarity, i.e. behaves as a single unite. In contrast to the deterministic approach, which allows us to evaluate only the probability of a crisis state in the development of a plant, the modeling proposed by the authors shows the dynamics and direction of the process: either synthesis or destruction. This feature is a methodological basis for assessing the impact of technogenic pollution of soils on the dynamics of metabolism of the test-object under examination. In this work, the dependence of the fractal characteristics of oat seedlings on the place of its germination and soil was studied. In our case, the fractal parameters allow us to judge the degree of development of the plant and how favorable the external conditions are for its growth.