Chemical elements composition of soils and plants of the West Taimyr floodplain landscapes
A. I. SYSO1, I. D. MAKHATKOV1,2, D. A. SOKOLOV1,2, S. A. KHUDYAEV1, A. S. CHEREVKO1, Z. A. YANCHENKO2, T. A. TURCHINA2
1Institute of Soil Science and Agrochemistry of SB RAS, Novosibirsk, Russia
2Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, Scientific-Research Institute of Agriculture and Ecology of the Arctic, Norilsk, Russia
Keywords: Arctic zone of Russia, Taimyr, floodplain landscapes, soils, forage plants, reindeer pastures, tundra, macroelements, trace elements
Abstract
In the floodplain landscapes of the Norilo-Pyasino lake-river system along the line the Daldykan River - the Ambarnaya River - the Pyasino Lake - the Pasina River - the Kara Sea changes in the alluvial soils properties were studied, specifically the content of chemical elements (N, P, K, Ca, Mg, Na, Fe, Mn, Zn, Cu, Co, Mo, B, S, As, Cd, Cr, Ni, in soils and plants of the Carex, Salix, Eguisetum genera and the Poaceae family. Natural factors were found to determine the difference between soils in granulometric composition, increased Cu, Ni and Co in soils and plants, surplus Fe and Mn and insufficient P, Zn and Mo in plants. The impact of technogenic contamination of the floodplains of the Daldykan, and Ambarnaya Rivers up to the Pyasino Lake was proven to increase soil acidity and total Cu, Ni and Co content, as well as the concentration of the mobile forms of soil S-SO4, Ni, Cu, Co, Cr. Due to the changes in the contaminated soils composition and properties, plants accumulated Cu, Co and B in excessive and Ni in toxic for plants and animals concentrations. Both natural and technogenic factors determined the increased, as compared with their Clarke number, content of As, Cd, Hg, Pb in plants, but not exceeding the maximal permissible concentrations in forage plants, and decreased plant P, Ca, Zn, Mo content, making it insufficient for the normal supply of the elements to agricultural animals. Since in the West Taimyr area the share of territories with technogenically contaminated soils and plants is not large, their negative effect on the reindeer diet will not be significant.
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