Microbial necromass as the source of soil organic carbon in global ecosystems

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 162, P. 108422 - 108422

Published: Sept. 14, 2021

Language: Английский

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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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Phosphorus addition decreases plant lignin but increases microbial necromass contribution to soil organic carbon in a subalpine forest

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(13), P. 4194 - 4210

Published: April 21, 2022

Increasing phosphorus (P) inputs induced by anthropogenic activities have increased P availability in soils considerably, with dramatic effects on carbon (C) cycling and storage. However, the underlying mechanisms via which drives plant microbial regulation of soil organic C (SOC) formation stabilization remain unclear, hampering accurate projection sequestration under future global change scenarios. Taking advantage an 8-year field experiment increasing addition levels a subalpine forest eastern Tibetan Plateau, we explored inputs, communities, biomarkers, as well SOC physical chemical fractions. We found that continuous reduced fine root biomass, but did not affect total content. decreased lignin contribution to SOC, primarily from declined vanillyl-type phenols, was coincided reduction methoxyl/N-alkyl 2.1%-5.5%. Despite decline decomposition due suppressed oxidase activity addition, content lignin-derived compounds because low input roots. In contrast, (mainly fungal) necromass its slower N-acquisition enzyme activity. The larger corresponded 9.1%-12.4% increase carbonyl abundance. Moreover, had no influence slow-cycing mineral-associated pool, stability indicated aliphaticity recalcitrance indices. Overall, over 8 years influenced composition through divergent alterations plant- microbial-derived contributions, shape stability. Such findings may aid accurately forecasting dynamics their potential feedbacks climate scenarios Earth system models.

Language: Английский

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Decreasing microbial phosphorus limitation increases soil carbon release

Geoderma, Journal Year: 2022, Volume and Issue: 419, P. 115868 - 115868

Published: April 7, 2022

Language: Английский

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Formation of soil organic carbon pool is regulated by the structure of dissolved organic matter and microbial carbon pump efficacy: A decadal study comparing different carbon management strategies

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(18), P. 5445 - 5459

Published: July 9, 2023

To achieve long-term increases in soil organic carbon (SOC) storage, it is essential to understand the effects of management strategies on SOC formation pathways, particularly through changes microbial necromass (MNC) and dissolved (DOC). Using a 14-year field study, we demonstrate that both biochar maize straw lifted ceiling, but different pathways. Biochar, while raising DOC content, decreased substrate degradability by increasing aromaticity. This resulted suppressed abundance enzyme activity, which lowered respiration, weakened vivo turnover ex modification for MNC production (i.e., low pump "efficacy"), led lower efficiency decomposing MNC, ultimately resulting net accumulation MNC. In contrast, incorporation increased content aromaticity DOC. The enhanced nutrient such as total nitrogen phosphorous, stimulated population thereby boosting respiration enhancing "efficacy" production. C added plots were estimated 27.3-54.5 41.4 Mg ha-1 , respectively. Our results demonstrated was more efficient lifting stock via exogenous stable input stabilization, although latter showed "efficacy". Meanwhile, significantly promoted also mineralization, smaller increase (by 50%) compared 53%-102%). address decadal-scale application pool soil, understanding causal mechanisms can allow practices maximize content.

Language: Английский

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Microbial carbon and phosphorus metabolism regulated by C:N:P stoichiometry stimulates organic carbon accumulation in agricultural soils

Soil and Tillage Research, Journal Year: 2024, Volume and Issue: 242, P. 106152 - 106152

Published: May 14, 2024

Language: Английский

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Saline-alkali land reclamation boosts topsoil carbon storage by preferentially accumulating plant-derived carbon

Science Bulletin, Journal Year: 2024, Volume and Issue: 69(18), P. 2948 - 2958

Published: May 18, 2024

Language: Английский

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Nitrogen addition increases microbial necromass in croplands and bacterial necromass in forests: A global meta-analysis

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 165, P. 108500 - 108500

Published: Dec. 6, 2021

Language: Английский

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Faster accumulation and greater contribution of glomalin to the soil organic carbon pool than amino sugars do under tropical coastal forest restoration

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(2), P. 533 - 546

Published: Oct. 17, 2022

Microbial metabolic products play a vital role in maintaining ecosystem multifunctionality, such as soil physical structure and organic carbon (SOC) preservation. Afforestation is an effective strategy to restore degraded land. Glomalin-related proteins (GRSP) amino sugars are regarded stable microbial-derived C, their distribution within aggregates affects stability SOC sequestration. However, the information about how afforestation microbial contribution pools poorly understood. We assessed accumulation of GRSP along restoration chronosequence (Bare land, Eucalyptus exserta plantation, native species mixed forest, forest) tropical coastal terraces. Amino concentrations increased, whereas contributions pool decreased chronosequence. Although microaggregates harbored greater abundances, were not significantly affected by aggregate sizes. Interestingly, with decreasing size which might be associated increased plant-derived C. relative change rate was consistently all chronosequences than that sugars. The closely dynamics fertility community. Our findings suggest accumulates faster contributes more during did greatly substantially enhanced quality forest comprising sequestering monoculture plantation did. Such invaluable for improving our mechanistic understanding control over preservation restoration. also show plantations using arbuscular mycorrhizal plants can practice sequester

Language: Английский

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Long-term nitrogen and phosphorus fertilization reveals that phosphorus limitation shapes the microbial community composition and functions in tropical montane forest soil

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 854, P. 158709 - 158709

Published: Sept. 17, 2022

Language: Английский

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