Investigation of the use of organic additives to im-prove the fertile properties of soil after screening

Abstract

The possibility of using soil passed through a screen to create a fertile layer on disturbed areas is considered. These soils may be contaminated with various toxic substances. Joint use of chemical-analytical methods and the proposed set of biotest systems with the use of test-cultures from different systematic groups (Daphnia magna Straus, Paramecium caudatum, Chlorella vulgaris Beijer, Triticum aestivum) with the use of standardized methods of eluate and substrate biotesting allow to increase the reliability of studies to assess the quality of soil. As a result of these studies, the degree of its ecotoxicity was determined and the soil hazard class was established. This approach to soil quality assessment can be recommended for environmental quality control purposes.

With the help of laboratory vegetation experiment the possibility of restoration of ecological properties of soil after screening and the possibility of increasing its fertility with promising ameliorants such as manure, biohumus and peat were considered. In the experiment the plant biomass of lawn grasses was taken into account, which serves as an integral indicator of vegetation productivity in assessing the physiological state of plants. As a result of the conducted research, the possibility of using the increase in soil fertility in the creation of a fertile layer in the areas of disturbed lands was established. The results of this work can be used in the development of technical specifications for the production of nutritious soil.