Keywords: potassium humate, sewage sludge, peat-humic fertilizer, liming, heavy metals

// Мелиорация. – 2017. – №3(81).– С. 76—81

The positive aftereffect of sewage sludge, liming and humates of potassium, both extracted from a vermicompost on the basis of sewage sludge, and included in peat-humic fertilizer, on biogeochemical indicators of agrocenosis was revealed. Soil treatment by potassium humate extracted from a vermicompost increased the value of the total contamination index (Zc) of mobile heavy metals in comparison with the background version, especially with a minimum dose of liming, and as a result Zc of oatsan was increased, primarily straw. Peathumic fertilizer decreases mobility of heavy metals in 0-20 cm soil layer on the basis of Zc level.