Ushakov R.N., Vinogradov D.V., Ruchkina A.V., Lupova E.I., Ivanov E.S., Pityurina I.S.

To the question of the fertility of gray forest (agro-gray) soil

The purpose of the research is to substantiate the characteristics of the chemical composition of the main soils of the Ryazan region, as well as to study the content of chemical elements after applying fertilizers to them under various grounds. The following soils were considered: sod-podzolic light loamy (PD), agro gray heavy loamy (L2) and leached chernozem of loamy granulometric composition (CV). Analyzes to determine the gross content of chemical elements in the arable layer of the soil and parent rock were determined by the X-ray fluorescence method. The main results of scientific research (scientific): the introduction of organic fertilizers significantly change the chemical composition of the soil. It has been established that all elements of the D.I. periodic system are present in the soils. Mendeleev. At the time of the cultivation of these soils, there was an increase in the content of almost all chemical elements, except for some of them: Ge, Ru, Rh, Ag, Cd, Sb, Re, Ir, Au and Hg. In some cases, the difference was a multiple of 3.0 ... 4.5 times. In this case, an increase in the maximum permissible concentrations was not found. A comparative analysis of the chemical composition of soil agro-sulfur under different grounds of the parent rock (surface loam) within its evolution indicates the accumulation of most elements. Apparently, this is due to their biological origin. The anthropogenic factor has a significant influence on the chemical composition of the soil agro-sulfur, the involvement of the soil in agricultural circulation. The obtained data can be used in the compilation of a database of environmental monitoring in relation to the chemical composition of soils under different agro-and natural ecosystems, both in comparative analysis and without it, as well as to assess the direction of evolution of soil chemistry

Keywords:MACROELEMENTS, MICROELEMENTAL CHEMICAL COMPOSITION, ORGANIC FERTILIZERS, GENESIS, FERTILITY, SCATTERED ELEMENTS