Lead Content in the System: the Breed в†’ Soil в†’ Humus Substances в†’ Plants, on the Example of Steppe and Forest-Steppe Soils of Western Transbaikalia
G. D. CHIMITDORZHIEVA1, E. A. BODEEVA2, A. Z. NIMBUEVA3
1Institute of General and experimental biology SB RAS, 670047, Ulan-Ude, Sakhyanovoy str., 6
2Buryat agricultural Academy, 670024, Ulan-Ude, Pushkinа str., 8
3Buryat Republican pedagogical College, 670034, Ulan-Ude, Namsaraeva str., 5
Keywords: lead, soil-forming rock, soils, ground and underground mass of vegetation, humic and fulvic acids
Abstract
Lead content in the organogenic layer of black soils and chestnut soils is high (it exceeds maximum permissible concentration) due to its significant contents in soil-forming rocks, and it is low in frozen soils of meadow-chernozem and gray forests. However, despite this difference, lead content in grassland vegetation growing on all four types of soils is equally low, as humus substances bind up to 40 % of the total lead content in soils. Of all humic substances, fulvic acids bind lead most actively.
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