Microbiological Indicators of Heavy Metals and Carbon-Containing Preparations Applied to Agrosoddy-Podzolic Soils Differing in Humus Content
| Autor: | Nadezhda Ananyeva, S. A. Kulachkova, Vera Terekhova, M. V. Gorlenko, E. V. Prudnikova, Sofia Sushko, P. V. Uchanov |
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| Rok vydání: | 2021 |
| Předmět: |
Pollution
Total organic carbon media_common.quotation_subject Soil Science chemistry.chemical_element 04 agricultural and veterinary sciences 010501 environmental sciences 01 natural sciences Soil quality Humus chemistry Microbial population biology Environmental chemistry Soil water Biochar 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Carbon 0105 earth and related environmental sciences Earth-Surface Processes media_common |
| Zdroj: | Eurasian Soil Science. 54:448-458 |
| ISSN: | 1556-195X 1064-2293 |
| Popis: | The response of the microbial community (microbial biomass carbon (Cmic), basal respiration (BR), and functional diversity (FD)) of agrosoddy-podzolic soil (Albic Glossic Retisols (Loamic, Aric Cutanic, Ochric)) to pollution by heavy metals (HMs: Cu 660, Zn 1100, Pb 650 mg/kg) and carbon-containing preparations (5% of biochar and 0.25% of lignohumate) was studied in model experiment (30 days). Soils with different organic carbon contents (Corg 3.86 and 1.30%) were sampled at two sites (Chashnikovo, Moscow oblast). We determined Cmic by the substrate-induced respiration method and FD by multisubstrate testing (47 substrates). It was found that HMs application reduced Cmic on average by 49–57%, BR by 23–52%, and FD by 45%, but, on the contrary, increased the microbial metabolic quotient (qCO2 = BR/Cmic) by 9–46%. The changes of these properties were most significant in the soil with low Corg content (1.30%). Carbon-containing preparations did not contribute to variations in Cmic, BR, and qCO2 in both soils with HMs, but increased their FD. It is concluded that the studied microbiological parameters may be used as indicators for optimal assessment of soil quality: FD and Cmic are the more sensitive to HMs than BR and qCO2. |
| Databáze: | OpenAIRE |
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