The dynamics of trace elements and heavy metals content in the soil profile of gray forest soil under the long-term use of fertilizers in crop rotation

Abstract

The results of investigations of changes in the content of mobile forms of trace elements and heavy metals under the systematic use of organic and mineral fertilizers in field crop rotation on gray forest soil are given. It was established that the use of fertilizers had little effect on the accumulation of these indicators in the soil relative to the initial state, but the excess of the MPC level was not observed for all elements. The most organoleptic fertilizer system (12 t/ha manure + N 60 P 60 K 68 ) was found to be the most effective both in the processes of accumulation of the most significant microelements in the life of plants and in the creation of a high level of productivity of the crop rotation. Under these conditions, a rational ratio between calcium and magnesium is noted. The use of organic fertilizers, creating conditions for the reproduction of humus stocks and optimization of the structure of hydrocarbons, does not provide optimal parameters for available forms of nutrients in the soil environment for field crop rotation crops. Application of purely mineral fertilizers at high loads in fertilizer systems is agronomically unworkable.