Increasing contribution of microbial residues to soil organic carbon in grassland restoration chronosequence

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 170, P. 108688 - 108688

Published: April 28, 2022

Language: Английский

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Estuarine plastisphere as an overlooked source of N2O production

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: July 6, 2022

"Plastisphere", microbial communities colonizing plastic debris, has sparked global concern for marine ecosystems. Microbiome inhabiting this novel human-made niche been increasingly characterized; however, whether the plastisphere holds crucial roles in biogeochemical cycling remains largely unknown. Here we evaluate potential of biotic and abiotic denitrification nitrous oxide (N2O) production estuaries. Biofilm formation provides anoxic conditions favoring denitrifiers. Comparing with surrounding bulk water, exhibits a higher denitrifying activity N2O production, suggesting an overlooked source. Regardless bacterial fungal denitrifications are main regulators instead chemodenitrification. However, contributions bacteria fungi different from those indicating distinct pattern plastisphere. These findings pinpoint as source, provide insights into new biotope Anthropocene.

Language: Английский

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Microbial necromass in cropland soils: A global meta‐analysis of management effects

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(7), P. 1998 - 2014

Published: Feb. 7, 2023

Abstract Microbial necromass is a large and persistent component of soil organic carbon (SOC), especially under croplands. The effects cropland management on microbial accumulation its contribution to SOC have been measured in individual studies but not yet summarized the global scale. We conducted meta‐analysis 481‐paired measurements from soils examine identify optimal conditions for accumulation. Nitrogen fertilization increased total C by 12%, cover crops 14%, no or reduced tillage (NT/RT) 20%, manure 21%, straw amendment 21%. was independent biochar addition. NT/RT fungal more than bacterial necromass. Manure higher fungal, leading decreased ratio fungal‐to‐bacterial Greater increases after amendments were common semi‐arid cool climates with pH <8, proportional amount input. In contrast, mainly warm humid climates. application irrespective properties climate. Management strong when applied during medium (3–10 years) long (10+ periods larger initial contents, absent sandy soils. Close positive links between biomass, indicate important role stabilized products accrual. increment (accumulation efficiency) NT/RT, crops, ranged 45% 52%, which 9%–16% N fertilization. summary, long‐term enhancing accumulation, optimizing sequestration requires site‐specific management.

Language: Английский

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Nitrogen fertilizer builds soil organic carbon under straw return mainly via microbial necromass formation

Soil Biology and Biochemistry, Journal Year: 2023, Volume and Issue: 188, P. 109223 - 109223

Published: Oct. 22, 2023

Language: Английский

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Drivers of microbially and plant‐derived carbon in topsoil and subsoil

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(22), P. 6188 - 6200

Published: Sept. 21, 2023

Abstract Plant‐ and microbially derived carbon (C) are the two major sources of soil organic matter (SOM), their ratio impacts SOM composition, accumulation, stability, turnover. The contributions key factors defining plant microbial C in along profile not well known. By leveraging nuclear magnetic resonance spectroscopy biomarker analysis, we analyzed three types using regional‐scale sampling combined these results with a meta‐analysis. Topsoil (0–40 cm) was rich carbohydrates lignin (38%–50%), whereas subsoil (40–100 contained more proteins lipids (26%–60%). proportion increases, while decreases content. decrease rate to plant‐derived (C M:P ) content 23%–30% faster topsoil than regional study had high potential stabilize through intensive transformations necromass formation. Plant input mean annual temperature were main topsoil, fungi‐to‐bacteria clay influencing . Combining meta‐analysis, highlighted contribution litter up 1‐m depth elucidated regulating long‐term preservation.

Language: Английский

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Biochar application in remediating salt-affected soil to achieve carbon neutrality and abate climate change

Biochar, Journal Year: 2023, Volume and Issue: 5(1)

Published: July 21, 2023

Abstract Salt-affected soils urgently need to be remediated achieve the goals of carbon neutrality and food security. Limited reviews are available on biochar performance in remediating salt-affected context climate change mitigation. This work summarized two pathways during using biochars, i.e., production from sustainable feedstock thermal technologies, application for promoting plant productivity mitigating greenhouse gas (GHG) emission. Converting biomass wastes into biochars can reduce GHG emission promote dioxide removal (CDR), collection halophyte as feedstocks, development poly-generation systems with or negativity could promising strategies. Biochar effectively improve growth soils, showing that grand mean response was 29.3%, via improving physicochemical characteristics, shifting microbial communities, enhancing halotolerance. Moreover, mitigate inducing negative priming effect, soil properties, changing communities associated nitrogen cycle, direct adsorption GHG. However, also may pose effects because stress toxic compounds free radicals, deterioration properties. The promoted is mainly ascribed positive provision labile inorganic fractions substrates. Finally, this review pointed out gaps current studies future perspectives. Particularly, “carbon neutral” negative” system, balancing relationship effectiveness functionality its environmental risks costs, designing biochar-based adsorbents would important directions abate change. Graphical

Language: Английский

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Integrating microbial community properties, biomass and necromass to predict cropland soil organic carbon

ISME Communications, Journal Year: 2023, Volume and Issue: 3(1)

Published: Aug. 23, 2023

Manipulating microorganisms to increase soil organic carbon (SOC) in croplands remains a challenge. Soil microbes are important drivers of SOC sequestration, especially via their necromass accumulation. However, microbial parameters rarely used predict cropland stocks, possibly due uncertainties regarding the relationships between pools, community properties and SOC. Herein we evaluated (diversity network complexity), pools (biomass carbon) 468 soils across northeast China. We found that not only but also complexity) biomass were correlated with Microbial diversity played more role predicting for maize, while complexity was rice. Models performed better when included simultaneously. Taken together our results suggest influence accumulation croplands, management practices improve these may levels.

Language: Английский

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Viral lysing can alleviate microbial nutrient limitations and accumulate recalcitrant dissolved organic matter components in soil

The ISME Journal, Journal Year: 2023, Volume and Issue: 17(8), P. 1247 - 1256

Published: May 29, 2023

Language: Английский

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Intercropping regulates plant- and microbe-derived carbon accumulation by influencing soil physicochemical and microbial physiological properties

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 364, P. 108880 - 108880

Published: Jan. 13, 2024

Language: Английский

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Microbial life‐history strategies mediate microbial carbon pump efficacy in response to N management depending on stoichiometry of microbial demand

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(5)

Published: May 1, 2024

The soil microbial carbon pump (MCP) is increasingly acknowledged as being directly linked to organic (SOC) accumulation and stability. Given the close coupling of (C) nitrogen (N) cycles constraints imposed by their stoichiometry on growth, N addition might affect growth strategies with potential consequences for necromass formation However, this topic remains largely unexplored. Based two multi-level fertilizer experiments over 10 years in soils contrasting fertility located North (Cambisol, carbon-poor) Southwest (Luvisol, carbon-rich), we hypothesized that different resource demands microorganism elicit a trade-off (Y-strategy) resource-acquisition (A-strategy) response addition, consequently We combined measurements metrics (MCP efficacy) stability (chemical composition mineral associated carbon) changes life history (assessed via metagenomes enzymatic activity analyses). contribution SOC decreased Cambisol, but increased Luvisol. Soil displayed distinct responses after amendment: shift toward A-strategy (Cambisol) or Y-strategy (Luvisol). These divergent are owing stoichiometric imbalance between availability C N, which presented very patterns soils. partial correlation analysis further confirmed high aggravated demand, shifting community strategy reduced Cambisol. In contrast, had positive direct effect MCP efficacy Luvisol, greatly enhanced Such findings provide mechanistic insights into regulation efficacy, how mediated site-specific trade-offs strategies, contribute improving our comprehension sequestration optimization agricultural management.

Language: Английский

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