Элементный состав лесных подстилок дерново-подзолистых почв пробных площадей Лесной опытной дачи

Abstract

The object to study iselemental composition of lime and pine forests litter of mixed grasses. In average samples, ground up and sieved through a sieve with adiameter of 0.25 mm, we determined the following: the hygroscopic moisture by drying in a desiccator above P2O5, the ash content by weight method, C, H, N content on a CHNS –vario Microcube automatic analyzer, the elemental composition by X-ray fluorescence method on the ReSPECTanalyzer of substance composition.Compared to lime forest litter, the organic part of pine forest one contains more aromatic, depleted in nitrogen-containing groups and oxidized compounds. The ash content of lime forest litter is 11.46%, pine forest litter - 7.19%. The chemical composition of the litter mineral part is formed by two groups of elements: macroelements (Ca, Si, Al, Fe, Mn, Mg, K, P, S, Na, Cl), which content varies from 0.02-0.03 to 2.36-3.07 % and microelements (Zn, Cr, Sr, Cu, Ni, Pb, Rb, As, Hg) contained in amounts from 0.24-0.39 to 151-199 μg / g. In the lime and pine forest litter in forest experimental dacha, Ca and Si absolutely prevail, which account for more than 70% in totalsum of the macroelements. Zn, Cr, Sr account for 74% in the total microelementsin pine forest litter and for 82% in lime forest one. Moreover, the total mineral elements content in the lime forest litter is higher except for Ni, Pb and Mn. The data obtained can be used for environmental monitoring. Keywords: FOREST LITTER, LIME FOREST, PINEFOREST, ORGANOGEN ELEMENTS, MACROELEMENTS, MICROELEMENTS, TRANSITION ELEMENTS