Генезис таежных слабодифференцированных почв Западной Сибири

RUSSIAN JOURNAL OF FOREST SCIENCE. 2017, No. 2, pp. 83-93 GENESIS OF TAIGA POORLY DIFFERENTIATED SOILS IN WEST SIBERIA Y. A. Golovleva 1 , N. A. Avetov 1 , A. Bruand 2 , A. V. Kiryushin 1 , I. I. Tolpeshta 1 , P.V. Krasil’nikov 1,3 1 Soil Science faculty, Lomonosov Moscow State University Leninskie Gory, 1 bldg., 12, Moscow, 119991, Russia 2 Institut des Sciences de la Terre d’Orleans Rue de la Ferolerie, 1A, Orleans, CS 20066 – 45071 France 3 Institute of Biology, Karelian Research Centre of the Russian Academy of Sciences Pushkinskaya st. 11, Petrozavodsk, 185910, Russia E-mail: Julango85@gmail.com Received 19 April 2016 We studied acid loamy and clayey mesomorphous soils in middle taiga subdomain in West Siberia. Micromorphological study in transmitted and reflected light, and scanning electronic microscopy showed multiple ferromanganese nodules and strong soil aggregation with roe aggregate structure. X-ray diffractometric analysis revealed smectite, illite, kaolinite, and vermiculite with interplanar Al as clay compounds. We found that the main soil forming processes in these soils are clay destruction by acid hydrolysis in the upper horizons and accumulation of aluminum in middle soil horizons. Specificity of soil morphology was linked with cryogenic structural transformations, and low mobility of silt caused by aluminum enrichment. The soils were classified as Cambisols and Alisols following WRB. Keywords: mesomorphous soils, hardpans, roe structure, acid hydrolysis, Al-enriched clays. REFERENCES Arinushkina E.V., Rukovodstvo po khimicheskomu analizu pochv (Handbook on chemical analysis of soils), Moscow: Izd-vo MGU, 1970, 487 p. 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