Effect of changes in soil moisture on agriculture soils: response of microbial community, enzymatic and physiological diversity

Bogati, Kalisa; Sewerniak, Piotr; Walczak, Maciej

doi:10.12775/eq.2023.043

Cited by 2 publications

(2 citation statements)

References 48 publications

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“…Severe drought stress and high salt concentrations limit microbial activities due to osmotic stress [11], as microbial communities face desiccation and physiological stress under dry conditions. Understanding the effects of salt stress and soil moisture regimes on SOM mineralization is crucial, as reduced soil moisture hampers water availability for metabolic activity, thereby decreasing substrate diffusion to microbes [12]. Investigating the complex relations among various environmental factors affecting soil respiration and soil microbial activities is essential for soil and environment management.…”

Section: Introductionmentioning

confidence: 99%

Integrated Impacts of Soil Salinity and Drought Stresses on the Decomposition of Plant Residues

Qadeer,

Wakeel,

Cheema

et al. 2024

Sustainability

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Soil salinity and drought are major environmental challenges that significantly affect soil functioning and soil organic matter (SOM) decomposition. Despite their importance, the combined effects of drought and salinity on residue decomposition are not well understood. This study addresses this gap by evaluating the decomposition of maize residue under salinity and drought stresses over a 75-day incubation period at 20 °C under controlled conditions. The experiment included two moisture levels: optimum moisture at 80% water-holding capacity (WHC) and drought conditions at 30% WHC, in both normal (ECe = 1.48 dS m−1) and saline (ECe = 8 dS m−1) soils, with 5 g DM kg−1 soil maize residues mixed in. A control treatment without maize residue addition was also included. The results indicated that salinity stress reduced maize residue decomposition, as evidenced by lower soil respiration, decay constant, metabolic quotient (qCO2), and soil extracellular enzyme activities. While drought did not affect total soil respiration in the presence of maize residue, it significantly decreased soil extracellular enzyme activities and decay constant rates. Combined drought and salinity stress further diminished maize residue decomposition, marked by reduced soil respiration, decay constant, microbial biomass carbon, and soil extracellular enzyme activities, while dissolved organic carbon (DOC) and qCO2 increased significantly. Similarly, extracellular enzyme activities were significantly reduced under abiotic stresses and further diminished under combined stress conditions. In conclusion, the simultaneous occurrence of drought and salinity can have compounded detrimental effects on microbial functioning, particularly in the presence of fresh plant residues.

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Section: Introductionmentioning

confidence: 99%

Integrated Impacts of Soil Salinity and Drought Stresses on the Decomposition of Plant Residues

Qadeer,

Wakeel,

Cheema

et al. 2024

Sustainability

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“…These stressful conditions reduce microbial populations, disrupt microbial structure, and reduce microbial activity, including enzyme production and nutrient cycling, resulting in decreased soil fertility. Despite the negative aspects of changes caused by drought, such harsh environmental conditions can cause adaptations in microbes and plants that allow them to survive and reproduce [20,21].…”

Section: Introductionmentioning

confidence: 99%

Microbiocenosis of the Permafrost Soils of Transbaikalia under Agriculture Use

Korsunova,

Chimitdorzhieva,

Chimitdorzhieva

et al. 2023

Agronomy

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An understanding of how the involvement of soils in agricultural turnover affects soil microbiocenosis has been attained. The aims of this study were to investigate the number of the main groups of microorganisms in microbial complexes, the carbon of microbial biomass and the enzymatic activity in permafrost soils under the influence of tillage. The presented data can provide an insight into the stability of the microbiome in region’s soils under agricultural influence. The significance of the study lies in obtaining new data on the microbiocenosis of permafrost soils, which will make it possible to reveal the orientation and intensity of microbiological processes during their agricultural use. The study uses the classical methods used in soil science and soil microbiology, which are characterized by accuracy and reliability. The general characteristics of the microbiocenosis of different types of the studied region’s soils have been revealed. The quantity of bacteria, including actinomycetes and fungi, in the studied soils was determined. The variability of indicators in time and space is shown. The number of bacteria was revealed to reach its maximum in the autumn period in grey forest non-podzolised soils, and the indicator decreases in the following manner: forest—10.6 billion cells/g, arable land—5.1 billion cells/g, virgin land—2.6 billion cells/g. The lowest indicator of bacterial abundance—0.5 billion cells/g was found on arable permafrost meadow chernozemic soil. A comparatively low bacterial content is characteristic of chernozem meal-carbonated: 1.9 billion cells/g on virgin land and 2.1 billion cells/g on arable land. The length of actinomycete mycelium is dynamic according to the seasons of the year. The maximum length of actinomycete mycelium was observed in grey forest non-podzolised soil (forest) in the autumn period—830 m/g. The maximum length of fungal mycelium was also observed in grey forest non-podzolised soil (forest) in autumn—1200 m/g. In arable variants, the length of fungal mycelium is high in grey forest non-podzolised soils and meadow permafrost soils. In chernozems and permafrost meadow chernozemic soils (virgin and arable) the index is much lower. Assessment of catalase activity showed that the studied soils are poor or moderately enriched in this enzyme. Relatively high invertase activity was found in all variants.

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Effect of changes in soil moisture on agriculture soils: response of microbial community, enzymatic and physiological diversity

Cited by 2 publications

References 48 publications

Integrated Impacts of Soil Salinity and Drought Stresses on the Decomposition of Plant Residues

Integrated Impacts of Soil Salinity and Drought Stresses on the Decomposition of Plant Residues

Microbiocenosis of the Permafrost Soils of Transbaikalia under Agriculture Use

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