The Sources of Income and the Dynamics of Heavy Metals in the Soil of Different Agro-Ecosystems with Their Long-Term Agricultural Use

Abstract

Listen

Translate article

In the present work, an attempt was made to determine the dynamics of the content of gross forms of heavy metals in long (50 years) field experiments of various agroecosystems on various fertilizer backgrounds. In the ecosystem of the field five-field grain-crop crop rotation, the dynamics of the content of heavy metals was more clearly expressed due to their higher removal due to a higher yield of crops entering the crop rotation, as well as more significant inflows of heavy metals to the soil with mineral fertilizers and manure at a dose of 20 tons / ha per rotation sowing volume. The main sources of heavy metals in the soil are the mineral and especially organic fertilizers. Introduction of mineral and organic fertilizers, even in moderate doses for 10 rotations has contributed to the content of heavy metals in the ploughed layer typical black earth and resulted in exceeding the concentrations of individual elements (Pb, Cd ), having high background values.