Rapid responses of root traits and productivity to phosphorus and cation additions in a tropical lowland forest in Amazonia

New Phytologist, Journal Year: 2020, Volume and Issue: 230(1), P. 116 - 128

Published: Dec. 20, 2020

Soil nutrient availability can strongly affect root traits. In tropical forests, phosphorus (P) is often considered the main limiting for plants. However, support P paradigm limited, and N cations might also control forests functioning. We used a large-scale experiment to determine how factorial addition of nitrogen (N), affected productivity traits related acquisition strategies (morphological traits, phosphatase activity, arbuscular mycorrhizal colonisation contents) in primary rainforest growing on low-fertility soils Central Amazonia after 1 yr fertilisation. Multiple were affected. Phosphorus additions increased annual diameter, but decreased activity. Cation at certain times year, increasing diameter colonisation. cation their element concentrations tissues. No responses detected with addition. Here we showed that rock-derived nutrients determined functioning Amazonian soils, demonstrating not only hypothesised importance P, highlighting role cations. The changes fine indicated even slow-growing rainforests respond rapidly resource availability.

Language: Английский

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Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral‐bound soil phosphorus in grasslands

Ecology, Journal Year: 2021, Volume and Issue: 103(3)

Published: Dec. 19, 2021

Phosphorus (P) limitation is expected to increase due nitrogen (N)-induced terrestrial eutrophication, although most soils contain large P pools immobilized in minerals (Pi ) and organic matter (Po ). Here we assessed whether transformations of these could plant available alleviating under enhanced N availability. The mechanisms underlying possible were explored by combining results from a 10-year field addition experiment 3700-km transect covering wide ranges soil pH, N, aridity, leaching, weathering that affect status grasslands. Nitrogen promoted the dissolution immobile Pi (mainly Ca-bound recalcitrant P) more forms (including Al- Fe-bound fractions Olsen decreasing pH 7.6 4.7, but did not Po . Soil total declined 10% 385 ± 6.8 346 9.5 mg kg-1 , whereas increased 546% 3.5 0.3 22.6 2.4 after addition, associated with an mobilization, uptake, leaching. Similar experiment, drop 7.5 5.6 concentration along grassland ratio between relatively mobile Our provide new mechanistic understanding important role mobilization maintaining supply accelerating biogeochemical cycles anthropogenic enrichment. This process temporarily buffers ecosystem or even causes will extensively deplete long run.

Language: Английский

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Stimulation of ammonia oxidizer and denitrifier abundances by nitrogen loading: Poor predictability for increased soil N₂O emission

Global Change Biology, Journal Year: 2021, Volume and Issue: 28(6), P. 2158 - 2168

Published: Dec. 19, 2021

Unprecedented nitrogen (N) inputs into terrestrial ecosystems have profoundly altered soil N cycling. Ammonia oxidizers and denitrifiers are the main producers of nitrous oxide (N2 O), but it remains unclear how ammonia oxidizer denitrifier abundances will respond to loading whether their responses can predict N-induced changes in N2 O emission. By synthesizing 101 field studies worldwide, we showed that significantly increased abundance by 107% 45%. The increases both were primarily explained form, more specifically, organic had stronger effects on than mineral loading. Nitrogen emission 261%, whereas there was no clear relationship between shifts abundances. Our field-based results challenge laboratory-based hypothesis would directly cause higher Instead, key abiotic factors (mean annual precipitation, pH, C:N ratio, ecosystem type) Altogether, these findings highlight need for considering roles regulating transformations under better understand microbially mediated

Language: Английский

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Predicting field N2O emissions from crop residues based on their biochemical composition: A meta-analytical approach

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 812, P. 152532 - 152532

Published: Dec. 22, 2021

Crop residue incorporation is a common practice to increase or restore organic matter stocks in agricultural soils. However, this often increases emissions of the powerful greenhouse gas nitrous oxide (N2O). Previous meta-analyses have linked various biochemical properties crop residues N2O emissions, but relationships between these been overlooked, hampering our ability predict from specific residues. Here we combine comprehensive databases for and characteristics with random-meta-forest approach, develop predictive framework effects on emissions. On average, increased soil by 43% compared removal, however led both reductions were best predicted easily degradable fractions (i.e. water soluble carbon, Van Soest fraction (NDS)), structural N returned The relationship differed widely terms form direction. due strong correlations among properties, able simplified classification based stage physiological maturity plant at which was generated. This criteria provided most robust yet simple approach categorize according their potential regulate Immature (high NDS total concentration, low relative cellulose, hemicellulose, lignin fractions, C:N ratio) strongly stimulated whereas mature opposite had marginal N2O. important types belonging immature group - cover crops, grasslands vegetables are delivery multiple ecosystem services. Thus, should be managed properly avoid potentially high

Language: Английский

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A meta-analysis of phosphatase activity in agricultural settings in response to phosphorus deficiency

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 165, P. 108537 - 108537

Published: Dec. 24, 2021

Phosphorus (P) is a key limiting factor in crop growth and essential for agriculture. As plant uptake of P inefficient, it commonly applied to maintain yields leading range negative environmental issues when excess. Additionally, mineral fertilisers derived from mined rock phosphate, which finite resource that needs be sustainably managed order food security the long-term. Phosphatase activity one several mechanistic responses deficiency plant-soil system, enabling mineralization organic increase availability both plants soil organisms. In this study we address need further understanding role phosphatase enzyme acquisition agricultural settings, using systematic review literature subsequent meta-analysis. We find monoesterase inhibited by inorganic (−23%, −39.8 −2.2%) yet enhanced (+74%, 8.4–232.1%). This indicates important deficient systems, more determining than level deficiency. also investigated other factors such as nitrogen addition, pH substrate changes composition physiology but, none these explained significant variance data. highlight consistent recording reporting additional variables association with assay data, required enable quantification potential utilisation resources agriculture, contribution semi-natural ecosystems.

Language: Английский

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Mycorrhizal fungi alleviate acidification‐induced phosphorus limitation: Evidence from a decade‐long field experiment of simulated acid deposition in a tropical forest in south China

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(11), P. 3605 - 3619

Published: Feb. 17, 2022

South China has been experiencing very high rate of acid deposition and severe soil acidification in recent decades, which proposed to exacerbate the regional ecosystem phosphorus (P) limitation. We conducted a 10-year field experiment simulated examine how impacts seasonal changes different P fractions tropical forest with highly acidic soils south China. As expected, addition significantly increased occluded pool but reduced other more labile pools dry season. In wet season, however, did not change microbial P, soluble organic pools. Acid exchangeable Al3+ Fe3+ activation Fe oxides both seasons. Different from decline abundance ectomycorrhizal fungi its ratio arbuscular mycorrhiza stimulated phosphomonoesterase activities likely promoted dissolution P. Our results suggest that, even already soils, acidification-induced limitation could be alleviated by stimulating activities. The differential responses controls transformation revealed here should implemented into biogeochemical model for predicting plant productivity under future scenarios.

Language: Английский

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Challenges in upscaling laboratory studies to ecosystems in soil microbiology research

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(3), P. 569 - 574

Published: Nov. 28, 2022

Soil microbiology has entered into the big data era, but challenges in bridging laboratory-, field-, and model-based studies of ecosystem functions still remain. Indeed, limitation factors laboratory experiments disregards interactions a broad range situ environmental drivers leading to frequent contradictions between laboratory- field-based studies, which may consequently mislead model development projections. Upscaling soil research from ecosystems represents one grand facing scientists, with great potential inform policymakers toward climate-smart resource-efficient ecosystems. The upscaling is not only scale problem, also requires disentangling functional relationships processes on each level. We point three reasons for gaps (i.e., spatiotemporal dynamics, sampling disturbances, plant-soil-microbial feedbacks), key issues caution when observations predictions across-scale effect, complex-process coupling, multi-factor regulation). Field-based cover limited variation that must be supplemented by mesocosm manipulative revealing underlying mechanisms. knowledge should motivate interdisciplinary collaboration across experimental, observational, theoretic, modeling research.

Language: Английский

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Ammoniated straw incorporation increases wheat yield, yield stability, soil organic carbon and soil total nitrogen content

Field Crops Research, Journal Year: 2022, Volume and Issue: 284, P. 108558 - 108558

Published: May 17, 2022

Language: Английский

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Ecosystem‐dependent responses of soil carbon storage to phosphorus enrichment

New Phytologist, Journal Year: 2023, Volume and Issue: 238(6), P. 2363 - 2374

Published: March 24, 2023

Phosphorus deposition can stimulate both plant carbon inputs and microbial outputs. However, how P enrichment affects soil organic (SOC) storage the underlying mechanisms remain unclear. We conducted a meta-analysis of 642 SOC observations from 213 field addition experiments world-wide explored regulations inputs, outputs, characteristics, environmental experimental factors on responses. found that, globally, stimulated by 4.0% (95% CI: 2.0-6.0%), but stimulation only occurred in forest cropland rather than grassland. Across sites, response correlated with that aboveground belowground biomass, suggesting change was more important regulating changes due to addition. Among multiple factors, N fixation status mean annual temperature were best predictors for responses addition, being higher ecosystems dominated symbiotic nitrogen fixers high-temperature regions like tropical forests. Our findings highlight differential ecosystem-dependent contribute accurate predictions dynamics P-enriched world.

Language: Английский

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Increased soil microbial AOB amoA and narG abundances sustain long-term positive responses of nitrification and denitrification to N deposition

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 166, P. 108539 - 108539

Published: Jan. 7, 2022

Language: Английский

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