Impact of agricultural land use on distribution of microbial biomass and activity within soil aggregates

The presence of aggregates of various sizes in the soil is an important condition for soil carbon sequestration. In this system, microbial biomass is a key link. This work was devoted to the study of the influence of land use systems on the distribution of SOС, MB‐SIR, microbial activity and eco‐phy...

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Bibliographic Details
Published in:Soil use and management 2023-01, Vol.39 (1), p.618-633
Main Authors: Vasilchenko, Anastasia V., Galaktionova, Lyudmila V., Tretyakov, Nikolay Yu, Dyachkov, Sergey M., Vasilchenko, Alexey S.
Format: Article
Language:English
Subjects:
Aggregates
Agricultural land
Agricultural practices
Biological activity
Biomass
Carbon sequestration
Crop rotation
Crops
Distribution
Energy efficiency
grain‐fallow crop rotation
Land use
Metabolism
Microbial activity
Microorganisms
Mineralization
mineralization activity
Monoculture
Physiology
Rotation
Soil
Soil aggregates
Soil conditions
soil microbial biomass
soil organic carbon
Soils
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Summary:The presence of aggregates of various sizes in the soil is an important condition for soil carbon sequestration. In this system, microbial biomass is a key link. This work was devoted to the study of the influence of land use systems on the distribution of SOС, MB‐SIR, microbial activity and eco‐physiological indices (qCO2, QR, MB‐SIR/SOС and qCO2/SOС) in relation to the size of soil aggregates. The distribution of SOС, MB‐SIR and mineralization activity among the aggregates was heterogeneous. In the soil of crop rotation, high mineralization activity and MB‐SIR were found in the aggregates 0.5–0.1 mm, in the monoculture soil in aggregates 5 mm), while in the control soil, by the aggregates 5–1 mm. Depending on the type of site and the size of aggregates, the differences in microbial metabolism were revealed. The qCO2 and QR values decreased, and the MB‐SIR/SOС and qCO2/SOС increased in the series: control soil > crop rotation > monoculture. In the control soil, the values of the eco‐physiological indices decreased with decreasing aggregate size. And vice versa, in agricultural soils, these parameters were the highest in the microaggregates (
ISSN:0266-0032
1475-2743
DOI:10.1111/sum.12844