Soil formation in the quarries for limestone and clay production in the Ukhta region |
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Authors: | E V Abakumov E I Maksimova A V Lagoda E M Koptseva |
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Institution: | 1.St. Petersburg State University,St. Petersburg,Russia |
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Abstract: | The soils forming on the overgrowing technogenic dumps of quarries for limestone and clay production were investigated in
the northern taiga (the Ukhta region). The soils are formed under sparse herbaceous plant communities. In the soils on calcareous
technogenic eluvium and clay dumps, the processes of humus formation and accumulation predominate. In the soils of the clay
dumps, the leaching of carbonates is expressed to a greater extent than in the soils of the limestone quarries. The nitrogen
content of organic matter is low in the soils on the technogenic lime substrates and very low on the clay ones. Fulvic acids
predominate in the humus composition. At the stages of the soil restoration studied, the zonal trend of pedogenesis is manifested
only in the humus accumulation. The calcareous technogenic eluvium is found to be more favorable for the development of microbial
communities as compared to the clay substrates with their small microbial biomass. However, there are no features pointing
to the development of zonal soil profiles. This fact attests that, in the first 20–30 years, the soil-forming potential in
the northern taiga is insufficient for the initiation of the zonal processes. |
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