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Sorption is one of the main processes stabilizing organic matter in soil against microbial mineralization. We hypothesize that besides reduced accessibility for microorganisms and enzymes, changes in microbial metabolism additionally intensify this organic matter stabilization effect of sorption.Position-specifically 14C labeled Alanine was applied to soil as solution or sorbed on sterilized soil...
Among other driving forces, climate change may lead to significant modifications of soil properties through variations of the intensity and dynamics of a number of soil processes including the especially sensitive and ubiquitous processes of bioturbation and illuviation. Progress toward the quantification of these processes needs to be made as a first step in order to ascertain or predict the impact...
Saline-sodic soils may be reclaimed through the addition of amendments to alter the soil pore system and hydraulic functions, therefore allowing salts to be leached from the soil. For the purpose of investigating the suitability of specific amendments for improving leaching and reclamation, soil percolation column studies were conducted to assess the influence of amendments on cation exchange, the...
The effects of tree species, parent material (substrate), and faunal bioturbation on carbon sequestration and chemical and microbial properties in soil were studied at three post-mining sites (Piaseczno, Szczakowa, and Bełchatów) in Poland that were reforested with pine, birch, oak, and alder. The samples were taken from the 0–5-cm mineral soil horizons beneath the litter layer. The samples were analyzed...
Many ecosystem functions and processes depend on biodiversity, however, the effect of root diversity in agroecosystems on soil bacterial communities and processes remained largely unknown. Our objectives were to examine the importance of increased root diversity through crop rotation on soil bacterial community composition and its relationship with soil carbon (C) and nitrogen (N) accumulation, which...
Studies on factors controlling C-stability in subsoils are very scarce. Recent results suggest a lack of labile C substrates and N limitations in subsoils as a reason for suppressed C-turnover. The catalytic activity of soil enzymes plays an important role for the decomposition of organic matter in soils and can be a powerful tool to shed further light on substrate and N-limitation as a hypothesized...
Decreasing O2 and increasing CO2 concentrations in the soil atmosphere with depth are one possible factor controlling C sequestration in subsoil. This study aimed to investigate the impact of these subsoil-specific gas conditions, which were measured in the field, on the decomposition of native soil organic C (SOC) and plant residues. Soil samples were taken on two neighbouring arable sites; one with...
Both nitrogen (N) and phosphorus (P) may limit plant production in steppes and affect plant community structure. However, few studies have explored in detail the differences and similarities in the responses of belowground microbial communities to long-term N and P inputs. Using a high-throughput Illumina Miseq sequencing platform, we characterized the bacterial communities in a semi-arid steppe subjected...
The ‘4 per mille Soils for Food Security and Climate’ was launched at the COP21 with an aspiration to increase global soil organic matter stocks by 4 per 1000 (or 0.4 %) per year as a compensation for the global emissions of greenhouse gases by anthropogenic sources. This paper surveyed the soil organic carbon (SOC) stock estimates and sequestration potentials from 20 regions in the world (New Zealand,...
Evaluating the accuracy of allocation to classes in monothetic hierarchical soil classification systems, including the World Reference Base for Soil Classification, US Soil Taxonomy, and Chinese Soil Taxonomy, is poorly-served by binomial methods (correct/incorrect allocation per evaluation observation), since some errors are more serious than others in terms of soil properties, map use, pedogenesis,...
Rice-rice is one of the major cropping systems in Indo-Gangetic Plains (IGP) of South Asia. Assessment of soil quality and identification of key indicators with their critical limits are very much important for maintaining normal functioning of the soil and productivity of crops, particularly of wet land rice. The present investigation was undertaken to identify sensitive soil quality indicators and...
In temperate rice paddy fields, winter cover cropping and its biomass application are strongly recommended to increase soil organic carbon (SOC) stock and decrease global warming potential (GWP). However, its biomass application may increase greenhouse gas (GHG) emissions, particularly methane (CH4), during flooded rice cultivation. To evaluate the effect of cover cropping and its biomass application...
Insight into the effects of fertilization on soil organic carbon (C) content and composition, and on microbial community and functions related to C decomposition are being gained, although the linkage between them remains elusive. To address this knowledge gap, a field experiment was conducted under different fertilization regimes, no fertilization (CL), chemical fertilization for 11years (CF), organic...
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