Soil and microbial biomass stoichiometry regulate soil organic carbon and nitrogen mineralization in rice-wheat rotation subjected to long-term fertilization

Journal of Soils and Sediments, Journal Year: 2020, Volume and Issue: 20(8), P. 3103 - 3113

Published: May 7, 2020

Language: Английский

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Organic matter stabilization in aggregates and density fractions in paddy soil depending on long-term fertilization: Tracing of pathways by 13C natural abundance

Soil Biology and Biochemistry, Journal Year: 2020, Volume and Issue: 149, P. 107931 - 107931

Published: July 18, 2020

Language: Английский

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Rice rhizodeposition promotes the build-up of organic carbon in soil via fungal necromass

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 160, P. 108345 - 108345

Published: June 21, 2021

Language: Английский

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Abiotic and biotic regulation on carbon mineralization and stabilization in paddy soils along iron oxide gradients

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 160, P. 108312 - 108312

Published: June 1, 2021

Language: Английский

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Microorganisms maintain C:N stoichiometric balance by regulating the priming effect in long-term fertilized soils

Applied Soil Ecology, Journal Year: 2021, Volume and Issue: 167, P. 104033 - 104033

Published: April 21, 2021

Language: Английский

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Microbial autotrophy explains large‐scale soil CO₂ fixation

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(1), P. 231 - 242

Published: Oct. 13, 2022

Microbial communities play critical roles in fixing carbon from the atmosphere and it soils. However, large-scale variations drivers of these microbial remain poorly understood. Here, we conducted a survey across China found that soil autotrophic organisms are for explaining CO2 fluxes to In particular, showed fixation rates highly correlated those bacteria phototrophic protists. Paddy soils, supporting larger proportion obligate bacterial protist autotrophs, display four-fold over upland forest Precipitation pH, together with key ecological clusters microbes, also played important controlling fixation. Our work provides novel quantification on contribution terrestrial microbes processes at large scale, implications global regulation under climate change.

Language: Английский

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Reduced chemodiversity suppresses rhizosphere microbiome functioning in the mono-cropped agroecosystems

Microbiome, Journal Year: 2022, Volume and Issue: 10(1)

Published: July 16, 2022

Abstract Background Rhizodeposits regulate rhizosphere interactions, processes, nutrient and energy flow, plant-microbe communication thus play a vital role in maintaining soil plant health. However, it remains unclear whether how alteration belowground carbon allocation chemodiversity of rhizodeposits influences microbiome functioning the ecosystems. To address this research gap, we investigated relationship with biodiversity during peanut ( Arachis hypogaea ) continuous mono-cropping. After continuously labeling plants 13 CO 2 , studied composition rhizodeposits, along diversity active using metabolomic, amplicon, shotgun metagenomic sequencing approaches based on DNA stable-isotope probing (DNA-SIP). Results Our results indicated that enrichment depletion microbial taxa varied across growth stages cropping durations. Specifically, gradual decrease allocation, chemodiversity, abundance plant-beneficial (such as Gemmatimonas Streptomyces Ramlibacter Lysobacter ), functional gene pathways quorum sensing biosynthesis antibiotics) was observed years We detected significant strong correlations between functioning, though these were regulated by different ecological processes. For instance, bacterial communities mainly governed deterministic stochastic respectively. Overall, reduction deposition mono-cropping tended to suppress its functions ecosystem. Conclusions results, for first time, provide evidence underlying mechanism malfunctioning mono-cropped systems. study opens new avenues deeply disentangle complex interactions from perspective will serve guide future improving services

Language: Английский

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Seven years of biochar amendment has a negligible effect on soil available P and a progressive effect on organic C in paddy soils

Biochar, Journal Year: 2022, Volume and Issue: 4(1)

Published: Jan. 19, 2022

Abstract Little attention has been paid to how long-term application of crop straw and its biochar affects soil phosphorus (P) transformation carbon (C) fractions. We conducted a 7-year field experiment including control treatment (chemical fertilizer only, CK), return (2.25 t ha −1 ), different amounts addition (11.25 (0.5%BC) 22.5 (1.0%BC), investigate influence these amendments on C structure, P fractions, their interaction with microorganisms. The 13 nuclear magnetic resonance sequence fractionation were applied capture changes compositions pool. Compared CK, decreased alkyl C/O-alkyl C, which is conducive increased organic C. 0.5%BC 1.0%BC treatments enhanced recalcitrant aromatic by 69.0% 131%, respectively. CK (101.2 ± 33.32 mg kg the had negligible effect available P, while negative effects observed in (59.79 9.023 ). Straw primary occluded whereas P. Redundancy analysis correlation indicated that pool correlated microbial community composition enzyme activities, was most related factor. Moreover, structural equation modeling phosphatase activity composition. Our findings reveal response under amendment, can contribute toward improving understanding future agriculture management.

Language: Английский

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Visualization and quantification of carbon “rusty sink” by rice root iron plaque: Mechanisms, functions, and global implications

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(22), P. 6711 - 6727

Published: Aug. 5, 2022

Paddies contain 78% higher organic carbon (C) stocks than adjacent upland soils, and iron (Fe) plaque formation on rice roots is one of the mechanisms that traps C. The process sequence, extent global relevance this C stabilization mechanism under oxic/anoxic conditions remains unclear. We quantified localized contribution Fe to matter in a microoxic area (rice rhizosphere) evaluated roles trap for sequestration paddy soils. Visualization localization pH by imaging with planar optodes, enzyme activities zymography, root exudation 14 imaging, as well upscale modeling enabled linkage three groups rhizosphere processes are responsible from micro- (root) macro- (ecosystem) levels. activity soil (reflecting rhizodeposits) Fe2+ addition was 1.4-1.5 times control phosphate Perfect co-localization hotspots β-glucosidase (by zymography) (14 C) showed labile high were within plaques. its microbial oxidation Fe3+ radial oxygen release increased (Fe3+ ) 1.7-2.5 times. amounts trapped 1.1 after addition. Therefore, formed amorphous complex (oxyhydr)oxides surface act "rusty sink" matter. Considering coverage soils globally, upscaling model revealed loss bacterial may up 130 Mg plaques per season. This represents an important annual surplus new stable existing pool long-term cropping.

Language: Английский

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RUSSELL REVIEW Are plant roots only “in” soil or are they “of” it? Roots, soil formation and function

European Journal of Soil Science, Journal Year: 2022, Volume and Issue: 73(1)

Published: Jan. 1, 2022

Abstract Roots are near‐ubiquitous components of soils globally but have often been regarded as separate from the soil rather than a substantial factor in determining what is and how it functions. The start rapid formation commenced about 400 million years ago with emergence vascular plants evolution roots associated microbes. microorganisms contribute significantly to by altering rocks minerals through variety biogeochemical processes supply carbon depth that can long residence times. Living root inputs via rhizodeposits more efficient shoot litter forming slow‐cycling, mineral‐associated organic pools. current functionality providing food fuel fibres, supplying plant nutrients, filtering water flood regulation, disease suppression all dependent on activities roots. actively communicating collaborating other organisms for mutual benefit, signals underlying this modulation rhizosphere microbiome being identified. In review I examine (an organ not an organism) affect function conclude that, several perspectives, just “in” “of” definitions should recognise this. A possible definition is: “Soils altered surficial rock or sediment, composed matter, minerals, fluids, whose influenced weathering interactions these roots.” Highlights Paleoclimatic paleosoil research shows key role mycorrhiza formation. Deep living contributors long‐term C storage. Root/microbe signalling facilitates mutualistic symbioses, nutrient uptake suppression. Definitions explicitly include important component system.

Language: Английский

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