Organomineral compost and its effects for the content of heavy metals in the top layer leached chernozem

Abstract

Abstract To date, the most reliable and environmentally friendly way to increase soil fertility and reduce the concentration of mobile forms of heavy metals is the use of organic fertilizers. The article discusses the results of field trials of compost composed of semi-rotted cattle manure, phosphogypsum and alfalfa hay. It was revealed that organic fertilization increases the concentration of organic matter in the upper layer of chernozem leached in the agrocenosis of maize. This enhances the sorption of the organic mineral complex of the soil and decreases the mass fraction of some heavy metals (HM). It is noted that the use of compost in doses of 40 and 60 t/ha helps to reduce the mass concentration of zinc, copper and manganese. The excess of the permissible concentration of highly toxic and dangerous for humans HM was not detected in any field variant.