Geology, geography and global energy

Scientific and Technical Journal

Lithogenous sequence of automorphic soils within middle taiga on Ustyansky plateau

2015. №3, pp. 54-63

Nikitina Olga A. - Post-graduate student, Lomonosov Moscow State University, GSP-1, 1 Leninskie gory, Moscow, 119991, Russian Federation, olganikitina.job@gmail.com

Gorbunova Irina A. - C.Sc. in Geography Associate Professor, Lomonosov Moscow State University, GSP-1, 1 Leninskie gory, Moscow, 119991, Russian Federation, iagorb@mail.ru

Soil lithogenous sequences represent a great interest for geography and soil science in particular. It enables correlation detection between main environmental components and serves as an important indicator while compiling soil maps. The Ustyanskoe plateau is a representative area, where dependency between soils and parent material is clear. Here automorphic soil formation takes place in a moderately cold humid climate on a flat terrain, where two-term sediments (loam moraine overlain by sandy fluvioglacial or lacustrine-glacial sediments) under spruce and parvifoliate forests with larch and Siberian fir are playing predominant role. Thickness of the upper coating layer varies significantly, which, in turn, leads to the formation of different zonal podzolic and intrazonal podzol soils types and subtypes. Start date for studying two-term sedimentary soils corresponds to the beginning of the 20th century. Followed by an intensive investigation period, genetic and diagnostic knowledge base on this subject have been significantly expanded and improved. Research conducted by V.D. Tonkonogov in 2010 reveals the attempt to identify genetic soil series (including lithogenous series) in its relation to the principles of the new Russian soil classification. Present paper goes in accordance with the mentioned research and develops this idea further. The connection between parent material and soil subtypes was investigated and described. Thus, study area represents the following soil subtype combination: podzolic on loamy sediments; pale-yellow podzolic, podzolic with contact bleached horizon and complex lithobarrier clay-illuviated podzols on two-term sediments; iron podzol, iron and humus podzol on sandy fluvioglacial sediments.

Key words: двучленные отложения, почвообразующие породы, литогенный ряд почв, классификация почв России, средняя тайга, подзолистые почвы, подзолы, two-term sediments, parent material, soil lithogenous sequence, Russian soil classification, middle taiga, podzolic so

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