Abstract
The paper presents the results of a long-term study on the content and distribution of heavy metals in Haplic Chernozem of agrocenoses in southern zone of Rostov Region. The impact of various agricultural technologies traditional (using moldboard ploughing) and resource-saving (minimum and No-till) on accumulation and mobility of Pb, Zn, Cu in Haplic Chernozem in winter wheat cultivation is considered. The total content of Pb, Zn, Cu in the winter wheat areas corresponds to the background level and does not exceed permissible concentrations. Low mobility of elements (Pb 2.0-3.0%; Zn and Cu up to 1.0% as a percentage of their total forms) is a regional soil feature. In addition, the low availability of Zn and Cu in soils is due to their removal with the crops in the absence of micronutrient fertilizer replenishment. The significant role of soil organic matter in the accumulation of both total and mobile forms of heavy metals in soil has been confirmed. The intensity of the cultivation methods used has a significant effect on the total content of Zn, Cu and on the mobility of Pb, Zn, Cu in Haplic Chernozem.
Highlights
Soil is one of the most important natural resources
Anthropogenic pressure on soils is often accompanied by their degradation, including pollution by heavy metals
Intensive farming contributes to a change in the content of metal compounds in the soil, which can negatively affect crop quality, both due to its decline caused by insufficient micronutrition and due to contamination of products with highly dangerous substances [1]
Summary
Soil is one of the most important natural resources. Anthropogenic pressure on soils is often accompanied by their degradation, including pollution by heavy metals. Among the many anthropogenic factors affecting the change in the content of heavy metals in the soil, crop production technologies play a significant role. The content and composition of heavy metals in agricultural soils is largely determined by the source material (parent rock). Their entry from other sources, including organic and mineral fertilizers, chemical ameliorants can be significant [2]. Widespread application of advanced resource-saving technologies based on minimal tillage is a pressing issue. It is the least studied under the soil and climatic conditions of Rostov Region.
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