Changes in plant inputs alter soil carbon and microbial communities in forest ecosystems

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(10), P. 3426 - 3440

Published: Jan. 29, 2022

Global changes can alter plant inputs from both above- and belowground, which, thus, may differently affect soil carbon microbial communities. However, the general patterns of how input them in forests remain unclear. By conducting a meta-analysis 3193 observations 166 experiments worldwide, we found that alterations aboveground litter and/or root had profound effects on communities forest ecosystems. Litter addition stimulated organic (SOC) pools biomass, whereas removal litter, roots or (no inputs) decreased them. The increased SOC under suggested benefit sequestration despite accelerated decomposition. Unlike removal, no altered particulate carbon, all detrital treatments did not significantly change mineral-associated carbon. In addition, contrastingly community, with shifting it toward fungi, bacteria. Furthermore, responses biomass to positively correlated rate total input, suggesting quantity is critical controller belowground processes. Taken together, these findings provide insights into understanding productivity allocation affects cycling, functioning ecosystems global changes. Future studies take full advantage existing detritus should focus relative roles forming its fractions.

Language: Английский

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Soil organic matter priming: The pH effects

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(6)

Published: June 1, 2024

Priming of soil organic matter (SOM) decomposition by microorganisms is a key phenomenon global carbon (C) cycling. Soil pH main factor defining priming effects (PEs) because it (i) controls microbial community composition and activities, including enzyme (ii) defines SOM stabilization destabilization mechanisms, (iii) regulates intensities many biogeochemical processes. In this critical review, we focus on prerequisites mechanisms PE depending assess the change consequences for PE. The highest PEs were common in soils with between 5.5 7.5, whereas low molecular weight compounds triggered mainly slightly acidic soils. Positive up to 20 times before C input at around 6.5. Negative below 4.5 or above 7 reflecting suboptimal environment specific high pH. Short-term acidification (in rhizosphere, after fertilizer application) affects by: mineral-SOM complexation, oxidation iron reduction, enzymatic depolymerization, pH-dependent changes nutrient availability. Biological processes metabolism shift over short-term, long-term adaptations slow are common. nitrogen fertilization induced land use intensification strongly decrease thus boost Concluding, one strongest but now disregarded factors PE, through short-term metabolic adaptation groups communities.

Language: Английский

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Long‐term nitrogen deposition inhibits soil priming effects by enhancing phosphorus limitation in a subtropical forest

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(14), P. 4081 - 4093

Published: April 25, 2023

It is widely accepted that phosphorus (P) limits microbial metabolic processes and thus soil organic carbon (SOC) decomposition in tropical forests. Global change factors like elevated atmospheric nitrogen (N) deposition can enhance P limitation, raising concerns about the fate of SOC. However, how N affects priming effect (PE) (i.e., fresh C inputs induced changes SOC decomposition) forests remains unclear. We incubated soils exposed to 9 years experimental a subtropical evergreen broadleaved forest with two types 13 C-labeled substrates contrasting bioavailability (glucose cellulose) without amendments. found decreased total biomass P, suggesting enhanced limitation. In unamended soils, significantly inhibited PE. contrast, adding increased PE under by larger extent for cellulose (PEcellu ) than glucose (PEglu ). Relative or solely, alleviated suppression C-acquiring enzymes deposition, whereas attenuated stimulation acid phosphatase (AP) deposition. Across treatments, PEglu as enzyme activity increased, PEcellu AP decreased. This suggests inhibits through varying mechanisms depending on substrate bioavailability; is, limitation regulates affecting growth investment acquisition, acquisition. These findings provide new insights impacted loading, expected quality affect long-term regulation

Language: Английский

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Input of high-quality litter reduces soil carbon losses due to priming in a subtropical pine forest

Soil Biology and Biochemistry, Journal Year: 2024, Volume and Issue: 194, P. 109444 - 109444

Published: April 22, 2024

Language: Английский

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Positive priming effect explained by microbial nitrogen mining and stoichiometric decomposition at different stages

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 175, P. 108852 - 108852

Published: Oct. 11, 2022

Language: Английский

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Biochar significantly reduced nutrient-induced positive priming in a subtropical forest soil

Biology and Fertility of Soils, Journal Year: 2023, Volume and Issue: 59(6), P. 589 - 607

Published: April 17, 2023

Language: Английский

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Nitrogen availability and mineral particles contributed fungal necromass to the newly formed stable carbon pool in the alpine areas of Southwest China

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 173, P. 108788 - 108788

Published: Aug. 9, 2022

Language: Английский

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Partially replacing chemical fertilizer with manure improves soil quality and ecosystem multifunctionality in a tea plantation

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 378, P. 109284 - 109284

Published: Sept. 7, 2024

Language: Английский

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Manure-nitrogen substitution for urea leads to higher yield but increases N2O emission in vegetable production on nitrate-rich soils

Agriculture Ecosystems & Environment, Journal Year: 2025, Volume and Issue: 383, P. 109541 - 109541

Published: Feb. 11, 2025

Language: Английский

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Soil organic carbon and nitrogen fractions as affected by straw and nitrogen management on the North China Plain

Agriculture Ecosystems & Environment, Journal Year: 2022, Volume and Issue: 342, P. 108248 - 108248

Published: Nov. 2, 2022

Language: Английский

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