Open AccessHumic substances elemental composition of selected taiga and tundra soils from Russian European North-East
Author(s) -
Е. Д. Лодыгин,
В. А. Безносиков,
Evgeny Abakumov
Publication year - 2017
Publication title -
polish polar research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 32
eISSN - 2081-8262
pISSN - 0138-0338
DOI - 10.1515/popore-2017-0007
Subject(s) - humus , tundra , taiga , soil water , environmental chemistry , organic matter , composition (language) , podzol , total organic carbon , chemistry , humic acid , environmental science , soil science , geology , ecology , arctic , biology , oceanography , organic chemistry , fertilizer , linguistics , philosophy
Soils of Russian European North were investigated in terms of stability and quality of organic matter as well as in terms of soils organic matter elemental composition. Therefore, soil humic acids (HAs), extracted from soils of different natural zones of Russian North-East were studied to characterize the degree of soil organic matter stabilization along a zonal gradient. HAs were extracted from soil of different zonal environments of the Komi Republic: south, middle and north taiga as well as south tundra. Data on elemental composition of humic acids and fulvic acids (FAs) extracted from different soil types were obtained to assess humus formation mechanisms in the soils of taiga and tundra of the European North-East of Russia. The specificity of HAs elemental composition are discussed in relation to environmental conditions. The higher moisture degree of taiga soils results in the higher H/C ratio in humic substances. This reflects the reduced microbiologic activity in Albeluvisols sods and subsequent conservation of carbohydrate and amino acid fragments in HAs. HAs of tundra soils, shows the H/C values decreasing within the depth of the soils, which reflects increasing of aromatic compounds in HA structure of mineral soil horizons. FAs were more oxidized and contains less carbon while compared with the HAs. Humic acids, extracted from soil of different polar and boreal environments differ in terms of elemental composition winch reflects the climatic and hydrological regimes of humification.