Sapropel – iloobraznoe natural organic matter, formed by deposition at the bottom of freshwater bodies of dead plants and microorganisms with limited access of oxygen. Formed by natural physical and chemical processes occurring in the water for tens of thousands of years, the composition of sapropels determines its quality and agronomic evaluation, as the raw materials used by mankind as a fertilizer, ieliorantov (rekultivantov) pochvoobrazovateley. Sapropel consists of mineral and organic parts. Depending on the composition of these parts of sapropels is divided into several types: – silica – calcareous mixed type. According to the content of organic matter in sapropels are divided into: – organic (ash content up to 30%) – organo-mineral (ash content 30-50%) – mineral-organic (ash content 50-70%) – saline (ash content 70-85%). Sapropel have a different chemical composition and are widely used as raw material for organic fertilizers for various purposes.
These fertilizers contain complex organic and mineral substances, nitrogen compounds, phosphorus, potassium, sulfur, copper, boron, molybdenum and other trace elements. As part of the organic part of sapropel are biologically active substances – humic acids, and vitamins. The most important characteristic of sapropel as Fertilizers – a general level of ash content and the content of silicon, iron, sulfur, carbonates, calcium, acidity, etc. In accordance with this sapropel are used to produce organic, organic and lime fertilizer can be applied in a mixture of manure, various wastes, mineral fertilizers. The mineral part of sapropel, which is the main component of the sapropel fertilizers contain large number of trace elements such as: Co, Mn, Cu, B, Zn, Br, Mo, V, Cr, Be, Ni, Ag, Sn, Pb, As, Ba, Sr, Ti.