Nitrogen addition stimulates soil aggregation and enhances carbon storage in terrestrial ecosystems of China: A meta‐analysis

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(12), P. 2780 - 2792

Published: March 20, 2021

Abstract China is experiencing a high level of atmospheric nitrogen (N) deposition, which greatly affects the soil carbon (C) dynamics in terrestrial ecosystems. Soil aggregation contributes to stability structure and C sequestration. Although many studies have reported effects N enrichment on bulk dynamics, underlying mechanisms explaining how aggregates respond remain unclear. Here, we used meta‐analysis data from 76N manipulation experiments ecosystems assess its sequestration C. On average, significantly increased mean weight diameter by 10%. The proportion macroaggregates silt‐clay fraction were (6%) decreased (9%) enrichment, respectively. A greater response macroaggregate (+15%) than (+5%) was detected across all However, had minor microaggregate magnitude effect varied with ecosystem type fertilization regime. Additionally, pH declined consistently correlated aggregate Overall, our suggests that promotes particulate organic accumulation via increasing acidifying soils. In contrast, increases could inhibit microbially mediated breakdown matter, causing minimal change mineral‐associated Our findings highlight deposition may enhance formation their China.

Language: Английский

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A holistic framework integrating plant-microbe-mineral regulation of soil bioavailable nitrogen

Biogeochemistry, Journal Year: 2021, Volume and Issue: 154(2), P. 211 - 229

Published: May 6, 2021

Soil organic nitrogen (N) is a critical resource for plants and microbes, but the processes that govern its cycle are not well-described. To promote holistic understanding of soil N dynamics, we need an integrated model links matter (SOM) cycling to bioavailable in both unmanaged managed landscapes, including agroecosystems. We present framework unifies recent conceptual advances our three steps cycling: (ON) depolymerization solubilization; sorption desorption on mineral surfaces; microbial ON turnover assimilation, mineralization, recycling products. Consideration balance between these provides insight into sources, sinks, flux rates N. By accounting interactions among biological, physical, chemical controls over availability complex mechanisms transformation concrete amenable experimental testing translates ideas new management practices. This will allow researchers practitioners use common measurements particulate (POM) mineral-associated (MAOM) design strategic N-cycle interventions optimize ecosystem productivity minimize environmental loss.The online version contains supplementary material available at 10.1007/s10533-021-00793-9.

Language: Английский

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Potential synergy of microplastics and nitrogen enrichment on plant holobionts in wetland ecosystems

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 915, P. 170160 - 170160

Published: Jan. 18, 2024

Language: Английский

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Vital roles of soil microbes in driving terrestrial nitrogen immobilization

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(9), P. 1848 - 1858

Published: Feb. 10, 2021

Abstract Nitrogen immobilization usually leads to nitrogen retention in soil and, thus, influences supply for plant growth. Understanding is important predicting cycling under anthropogenic activities and climate changes. However, the global patterns drivers of remain unclear. We synthesized 1350 observations gross rate (NIR) from 97 articles identify NIR. The mean NIR was 8.77 ± 1.01 mg N kg −1 day . It 5.55 0.41 croplands, 15.74 3.02 wetlands, 15.26 2.98 forests. increased with annual temperature, precipitation, moisture, organic carbon, total nitrogen, dissolved ammonium, nitrate, phosphorus, microbial biomass carbon. But it decreased pH. results structural equation models showed that carbon a pivotal driver NIR, because pH mostly indirectly influenced via changing biomass. Moreover, accounted most variations among all direct relationships. Furthermore, efficiency transforming immobilized lower croplands than natural ecosystems (i.e., forests, grasslands, wetlands). These findings suggested may decrease land use change forests or wetlands but expected increase due warming. identified this study are crucial project changes retention.

Language: Английский

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Intercropping Alters the Soil Microbial Diversity and Community to Facilitate Nitrogen Assimilation: A Potential Mechanism for Increasing Proso Millet Grain Yield

Frontiers in Microbiology, Journal Year: 2020, Volume and Issue: 11

Published: Nov. 24, 2020

Intercropping of cereals and legumes has been used in modern agricultural systems, the soil microorganisms associated with play a vital role organic matter decomposition nitrogen (N) fixation. This study investigated effect intercropping on rhizosphere microbial composition structure how this interaction affects N absorption utilization by plants to improve crop productivity. Experiments were conducted analyze diversity relationship between assimilation proso millet ( Panicum miliaceum L.) mung bean Vigna radiata from 2017 2019. Four different row arrangements evaluated, individual plantings as controls. Microbial community determined through Illumina sequencing 16S rRNA internal transcribed spacer (ITS) genes. The results indicated that increased levels soil–plant system alteration was strongly dependent changes (bacterial fungal) diversities communities. increase bacterial alpha unique operational taxonomic unit (OTU) numbers availability plant accumulation. Certain taxa (such Proteobacteria) fungal Ascomycota) significantly altered under showed positive responses assimilation. average grain yield intercropped 13.9–50.1% compared monoculture millet. Our data clearly composition; thus, represents potential mechanism for promoting increasing yield.

Language: Английский

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Synergy of saprotrophs with mycorrhiza for litter decomposition and hotspot formation depends on nutrient availability in the rhizosphere

Geoderma, Journal Year: 2021, Volume and Issue: 410, P. 115662 - 115662

Published: Dec. 27, 2021

Language: Английский

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Alterations in soil pH emerge as a key driver of the impact of global change on soil microbial nitrogen cycling: Evidence from a global meta‐analysis

Global Ecology and Biogeography, Journal Year: 2022, Volume and Issue: 32(1), P. 145 - 165

Published: Nov. 20, 2022

Abstract Aim Soil nitrogen (N) cycling is critical to the productivity of terrestrial ecosystems. However, impact global change factors (GCFs) on microbial mediators N pathways has yet be synthesized, and it also remains unclear whether response abundance N‐cycling genes can predict changes in their corresponding processes. Location Global. Time period 2000–2021. Major taxa studied Archaea, bacteria. Methods We synthesized 8322 paired observations soil microorganisms related from field experiments which GCFs (climate nutrient addition) were manipulated. Results found that microbes most resistant elevated CO 2 , experimental warming water addition/reduction; however, addition combination with other significantly increased ammonia oxidizer bacteria ( amoA‐AOB ). The results indicated steady‐state (natural) conditions, main driving bacteria, archaea varied terms contributions climatic edaphic factors. upon manipulation GCFs, induced pH was essential factor associated genes. Notably, ammonia‐oxidizing amoA‐AOA ) genes, involved denitrification nirS nirK ), correlated rates processes, but GCF‐induced shifts potential nitrification rate (PNR) explained well by gene under GCFs. Main conclusions Our study highlights how ongoing might have a profound cycling. field‐based provide new insights into drivers

Language: Английский

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Chronic enhanced nitrogen deposition and elevated precipitation jointly benefit soil microbial community in a temperate forest

Soil Biology and Biochemistry, Journal Year: 2024, Volume and Issue: 193, P. 109397 - 109397

Published: March 10, 2024

Language: Английский

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Nitrogen sensitivity of soil microorganism community in alpine desert steppe is not always higher than that in alpine steppe

Global Ecology and Conservation, Journal Year: 2025, Volume and Issue: 59, P. e03459 - e03459

Published: Jan. 25, 2025

Language: Английский

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Nitrogen addition promotes soil microbial beta diversity and the stochastic assembly

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 806, P. 150569 - 150569

Published: Sept. 28, 2021

Language: Английский

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