Vertical and spatial distribution of major and trace elements in the catena with Retisols in the Central Forest Nature Reserveтезисы доклада

Дата последнего поиска статьи во внешних источниках: 29 мая 2019 г.

Работа с тезисами доклада

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1. Полный текст Kasimov_et_al_full_text.doc 83,5 КБ 20 декабря 2018 [INSemenkov]

[1] Vertical and spatial distribution of major and trace elements in the catena with retisols in the central forest nature reserve / N. S. Kasimov, I. N. Semenkov, E. N. Aseeva et al. // Environment and Soil Resources Conservation: abstracts of the 10th International Soil Science Congress. — Almaty, 2018. — P. 89–92. In 2017 and 2018, we investigated the vertical and spatial distribution of major and trace elements in four soil profiles of Retisols within a typical catena in the Central Forest Nature Reserve. In 90 soil samples we measured total organic carbon, pH, grain size distributions, total concentrations of Co, Cr, Cu, Fe, Mn, Ni, Pb, Sr, Ti, Zn, Zr and levels of their mobile fractions: exchangeable, bound to organic and other complexes ("organic” fraction) and those phases that are associated with Fe and Mn hydroxides (“hydroxidous” fraction). In the umbric horizon the average total concentration of Fe is 1,2%, Ti – 0,33%, Mn – 482 mg‧kg-1, Zr – 292 mg‧kg-1, Sr – 90 mg‧kg-1, Zn – 39 mg‧kg-1, Cr – 21 mg‧kg-1, Pb – 21 mg‧kg-1, Ni – 9 mg‧kg-1, Cu 8 – mg‧kg-1. The concentrations of the exchangeable fraction of the metals diminish in order: Fe> Mn> Sr> Zn, Pb> Ti, Cr, Ni, Cu, Co, Zr; the concentrations of the “organic” fraction and the “hydroxidous” fractions show the following order: Fe> Mn>> Ti, Zr, Pb> Co> Ni, Cu, Zn> Cr, Sr and Fe> Mn> Ti> Zn, Sr, Pb> Cr> Cu, Ni, Co> Zr, respectively. In all studied Retisols the total Pb and Zr, the exchangeable fraction of Co, Fe, Mn, Pb and Zn, the “organic” fraction of Cu, Fe, Pb and Zn, the “hydroxidous” fraction of Pb accumulate in topsoil horizons. For the total Co, Fe, Ni, Sr and Zn, the exchangeable Co, Cr, Cu, Mn, Pb, Zn and Zr, the “organic” Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn and Zr and the “hydroxidous” Co, Cr, Cu, Ti, Zn, Zr the loss from the albic horizons and/or the accumulation in the argic horizons were registered. The total concentrations of all studied elements increase in the umbric horizon in the upper part of the catena, at its slope position. In the umbric horizons in its lower part (footslope and toeslope) positions, the concentrations of exchangeable Ni, Cu, Sr and Zr, “organic” Ni, Cu and Zn increases, and the concentration of exchangeable Co, Cr, Pb, Ti and Zn, “organic” Cr, Ti and Co, “hydroxidous” Mn, Ni, Zn, Pb, Zr decreases.

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