Carbon and nitrogen recycling from microbial necromass to cope with C:N stoichiometric imbalance by priming

Soil Biology and Biochemistry, Journal Year: 2020, Volume and Issue: 142, P. 107720 - 107720

Published: Jan. 17, 2020

Language: Английский

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Contrasting pathways of carbon sequestration in paddy and upland soils

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(11), P. 2478 - 2490

Published: March 13, 2021

Paddy soils make up the largest anthropogenic wetlands on earth, and are characterized by a prominent potential for organic carbon (C) sequestration. By quantifying plant- microbial-derived C in across four climate zones, we identified that accrual is achieved via contrasting pathways paddy upland soils. Paddies 39%-127% more efficient soil (SOC) sequestration than their adjacent counterparts, with greater differences warmer cooler climates. Upland replenished C, whereas enriched proportion of plant-derived because retarded microbial decomposition under anaerobic conditions induced flooding paddies. Under both land-use types, maximal contribution plant residues to SOC at intermediate mean annual temperature (15-20°C), neutral (pH~7.3), low clay/sand ratio. contrast, high (~24°C), pH (~5), large ratio favorable strengthening necromass. The necromass waterlogged paddies climates likely due fast anabolism from bacteria, fungi unlikely be involved as they aerobic. In scenario conversion upland, total 504 Tg may lost CO

Language: Английский

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Rice paddy soils are a quantitatively important carbon store according to a global synthesis

Communications Earth & Environment, Journal Year: 2021, Volume and Issue: 2(1)

Published: Aug. 6, 2021

Abstract Rice paddies account for ~9% or the world’s cropland area and are characterized by environmental conditions promoting soil organic carbon storage, methane emissions to a lesser extent nitrous oxide emissions. Here, we synthesize data from 612 sites across 51 countries estimate global stocks in paddy soils determine main factors affecting storage. Paddy (0–100 cm) contain 18 Pg worldwide. decrease with increasing mean annual temperature pH, whereas precipitation clay content had minor impacts. Meta-analysis shows that can be increased through several management practices. However, greenhouse gas mitigation storage is generally outweighed increases Our results emphasize key role of cycle, importance minimizing anthropogenic

Language: Английский

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Greenhouse gas emissions and mitigation in rice agriculture

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(10), P. 716 - 732

Published: Sept. 26, 2023

Language: Английский

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Comparing carbon and nitrogen stocks in paddy and upland soils: Accumulation, stabilization mechanisms, and environmental drivers

Geoderma, Journal Year: 2021, Volume and Issue: 398, P. 115121 - 115121

Published: April 16, 2021

Language: Английский

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New insights into carbon mineralization in tropical paddy soil under land use conversion: Coupled roles of soil microbial community, metabolism, and dissolved organic matter chemodiversity

Geoderma, Journal Year: 2023, Volume and Issue: 432, P. 116393 - 116393

Published: Feb. 22, 2023

Although the impact of land conversion on carbon mineralization in paddy soils has received increasing attention, coupled roles soil microdiversity and chemodiversity these processes are largely unknown. To address this issue, use from fields (PF) to vegetable (VF), rice-vegetable rotation (RV), abandoned (AL), were investigated study. The relationships between characteristics microbial community, metabolism physiology dissolved organic matter (DOM) analyzed. After conversion, enhanced AL RV, which 217.49% 183.02% that PF. In contrast, no significant change was observed VF, although anaerobic environment transformed into an aerobic one fungal richness/ diversity increased soil. This because directly regulated by DOM quantity labile carbon, indirectly community. Specifically, largest attributed strongest as had DOC contents, hydrophilic substances (e.g., carboxyl, carbohydrate, amino), abundant eutrophic taxa Actinobacteria Proteobacteria). VF mainly related more condensed aromatics oligotrophic microbes, fewer soil, resulting dominance recalcitrant carbon. also prevailed RV. However, RV showed moderate due having proper with high bioavailability. Collectively, results provide molecular insights a micro-chemodiversity perspective, highlights importance nutrient supply strategy.

Language: Английский

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Soil moisture controls over carbon sequestration and greenhouse gas emissions: a review

npj Climate and Atmospheric Science, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 14, 2025

This literature review synthesizes the role of soil moisture in regulating carbon sequestration and greenhouse gas emissions (CS-GHG). Soil directly affects photosynthesis, respiration, microbial activity, organic matter dynamics, with optimal levels enhancing storage while extremes, such as drought flooding, disrupt these processes. A quantitative analysis is provided on effects CS-GHG across various ecosystems climatic conditions, highlighting a "Peak Decline" pattern for CO₂ at 40% water-filled pore space (WFPS), CH₄ N₂O peak higher (60–80% around 80% WFPS, respectively). The also examines ecosystem models, discussing how dynamics are incorporated to simulate nutrient cycling. Sustainable management practices, including conservation agriculture, agroforestry, optimized water management, prove effective mitigating GHG by maintaining ideal levels. further emphasizes importance advancing multiscale observations feedback modeling through high-resolution remote sensing ground-based data integration, well hybrid frameworks. interactive model-experiment framework emerges promising approach linking experimental model refinement, enabling continuous improvement predictions. From policy perspective, shifting focus from short-term agricultural productivity long-term crucial. Achieving this shift will require financial incentives, robust monitoring systems, collaboration among stakeholders ensure sustainable practices effectively contribute climate mitigation goals.

Language: Английский

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Microbial carbon use efficiency, biomass turnover, and necromass accumulation in paddy soil depending on fertilization

Agriculture Ecosystems & Environment, Journal Year: 2020, Volume and Issue: 292, P. 106816 - 106816

Published: Jan. 17, 2020

Language: Английский

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Paddy soils have a much higher microbial biomass content than upland soils: A review of the origin, mechanisms, and drivers

Agriculture Ecosystems & Environment, Journal Year: 2021, Volume and Issue: 326, P. 107798 - 107798

Published: Nov. 27, 2021

Language: Английский

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Labile carbon matters more than temperature for enzyme activity in paddy soil

Soil Biology and Biochemistry, Journal Year: 2019, Volume and Issue: 135, P. 134 - 143

Published: May 2, 2019

Language: Английский

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