Experimental evidence for viral impact on microbial community, nitrification, and denitrification in an agriculture soil

Journal of Hazardous Materials, Год журнала: 2025, Номер 489, С. 137532 - 137532

Опубликована: Фев. 8, 2025

Язык: Английский

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Nitrogen additions increase soil microbial nitrate- rather than ammonium- immobilization

Biology and Fertility of Soils, Год журнала: 2025, Номер unknown

Опубликована: Фев. 8, 2025

Язык: Английский

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Biodegradable Microplastics Increase Fungi-Mediated N2o Emission by Rapidly Releasing Dissolved Organic Matters

Опубликована: Янв. 1, 2025

Plastic pollution in paddy fields disrupts soil nitrogen biogeochemistry, prompting the introduction of biodegradable plastics like PBAT (poly (butylene adipate-co-terephthalate)) as a potential mitigation strategy. However, effects nonbiodegradable and microplastics on cycle remain unclear. To clarify this, we conducted an incubation experiment, employing 15N isotopic tracing, N2O isotopocules, molecular analysis to assess impact additives from non-biodegradable (polyethylene, PE) microplastics. This study aimed investigate their emission bacterial, fungal, chemical denitrification. The results showed that PE reduced production denitrification (DN2O) bacterial (BDN2O), while increased DN2O fungal-derived (FDN2O) but decreased BDN2O. inhibited via due toxicity plastic such dibutyl phthalate diethylhexyl phthalate. In contrast, enhanced fungal pathways by facilitating release dissolved organic carbon. Bacterial accounted for 43-56% total treatments only 28-50% treatments. These findings highlight short-term risks posed elevating emissions reveal new dimensions influence greenhouse gas agricultural soils.

Язык: Английский

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Warming-induced increase in N2O fluxes decreases with the legacy of agriculture and latitude in abandoned croplands

Agriculture Ecosystems & Environment, Год журнала: 2025, Номер 382, С. 109498 - 109498

Опубликована: Янв. 19, 2025

Язык: Английский

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Evaluating the Optimal Land Use Pattern for Saline-Sodic Soils from the Perspective of Nitrogen Metabolism

Опубликована: Янв. 1, 2025

Язык: Английский

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Earthworm invasion and interaction with litter increased CO2 and N2O emissions in Changbai Mountain: A microcosm study

Applied Soil Ecology, Год журнала: 2024, Номер 202, С. 105533 - 105533

Опубликована: Июль 24, 2024

Язык: Английский

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Partitioning denitrification pathways in N2O emissions from re-flooded dry paddy soils

Biogeochemistry, Год журнала: 2024, Номер 167(10), С. 1315 - 1333

Опубликована: Авг. 22, 2024

Abstract In flooded paddy fields, peak greenhouse gas nitrous oxide (N 2 O) emission after rewetting the dry soils is widely recognised. However, relative contribution of biotic and abiotic factors to this remains uncertain. study, we used isotope technique (δ 18 O δ 15 N SP ) molecular-based microbial analysis in an anoxic incubation experiment evaluate contributions bacterial, fungal, chemical denitrification emissions. We collected eight representative across southern China for experiment. Results show that during 10-day period, net emissions were mainly produced by fungal denitrification, which accounted 58–77% six investigated soils. contrast, bacterial contributed 6–15% Moreover, around 11–35% total derived from all soil types. Variation partitioning (VPA) principal component (PCA) demonstrated initial organic carbon (OC) concentrations primary regulator source patterns. Soils with relatively lower OC concentration (7–15 mg g −1 tend be dominated production at end period. Overall, these findings highlight dominance pathway soils, predominates content. This suggests should considered when optimizing agricultural management system timing control ecosystems, relevant establishment predictive numerical models future.

Язык: Английский

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Nitrous oxide is the main product during nitrate reduction by a novel lithoautotrophic iron(II)-oxidizing culture from an organic-rich paddy soil

Applied and Environmental Microbiology, Год журнала: 2024, Номер 91(1)

Опубликована: Дек. 6, 2024

Microbial nitrate reduction coupled to iron(II) oxidation (NRFeOx) occurs in paddy soils due high levels of dissolved and regular application nitrogen fertilizer. However, date, there is no lithoautotrophic NRFeOx isolate or enrichment culture available from this soil environment. Thus, resulting impacts on greenhouse gas emissions during (i.e., nitrous oxide [N2O]) toxic metalloid arsenic) mobility can hardly be investigated. We enriched a culture, HP (Huilongpu paddy, named after its origin), Town, China), which was dominated by Gallionella (71%). The reduced 0.45 0.63 mM oxidized 1.76 2.31 within 4 days leading N2O as the main N-product (62%-88% N2O-N total NO3--N). Nitrite present an intermediate at maximum 0.16 ± 0.1 mM. Cells were associated with, but mostly not encrusted by, poorly crystalline iron(III) minerals (ferrihydrite). Culture performed best below threshold 2.5-3.5 pH range 6.50-7.05. In presence 100 µM arsenite, only 0%-18% oxidized. Due low oxidation, arsenite immobilized. proportion NO3--N decreased 77% 30%. Our results indicate that even organic-rich soils, denitrification subsequent emissions. obtained novel allows us study impact arsenic soils.IMPORTANCEPaddy are naturally rich regularly experience inputs fertilization. Nitrogen fertilization increases it product reduction. Microorganisms live using electron acceptor donor, respectively, require organic co-substrate. By contrast, microorganisms rely nitrate, iron(II), CO2 could inhabit carbon-limited ecological niches. So far, consortium iron(II)-oxidizing, nitrate-reducing has been soil. Here, we describe typical iron(II)-oxidizer (Gallionella), oxide, negatively impacting dynamics. High concentrations nitrate. suggest autotrophic with relevant, previously overlooked process soils.

Язык: Английский

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Experimental Evidence for Viral Impact on Microbial Community, Nitrification, and Denitrification in Soil

Опубликована: Янв. 1, 2024

Язык: Английский

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