Quantifying nitrous oxide production rates from nitrification and denitrification under various moisture conditions in agricultural soils: Laboratory study and literature synthesis

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 13

Published: Jan. 12, 2023

Biogenic nitrous oxide (N2O) from nitrification and denitrification in agricultural soils is a major source of N2O the atmosphere, its flux changes significantly with soil moisture condition. However, quantitative relationship between production different pathways (i.e., vs. denitrification) content remains elusive, limiting our ability predicting future emissions under changing environment. This study quantified rates various conditions using laboratory incubation combined literature synthesis. 15N labeling approach was used to differentiate eight contents ranging 40 120% water-filled pore space (WFPS) study, while 80 groups data 17 studies across global were collected Results showed that as increased, first increased then decreased, peak occurring 95% WFPS. By contrast, dominant pathway switched 60 70% Furthermore, synthetic elucidated driver controlling relative contributions production, NH4 + NO3 - concentrations mainly determined each pathway. The treatments broad narrow gradient required capture comprehensive response rate change, essential for accurately emission climate change scenarios.

Language: Английский

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Intermediate soil acidification induces highest nitrous oxide emissions

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 27, 2024

Abstract Global potent greenhouse gas nitrous oxide (N 2 O) emissions from soil are accelerating, with increases in the proportion of reactive nitrogen emitted as N O, i.e., O emission factor (EF). Yet, primary controls and underlying mechanisms EFs remain unresolved. Based on two independent but complementary global syntheses, three field studies determining effects acidity denitrifying microorganisms, we show that pH predominantly by affecting denitrifier community composition. Analysis 5438 paired data points fluxes revealed a hump-shaped relationship between EFs, highest occurring moderately acidic soils favored O-producing over O-consuming induced high emissions. Our results illustrate has unimodal denitrifiers net depends both O/(N + ) ratio overall denitrification rate. These findings can inform strategies to predict mitigate under future input scenarios.

Language: Английский

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Effect of antibiotic perturbation on nitrous oxide emissions: An in-depth analysis

Critical Reviews in Environmental Science and Technology, Journal Year: 2024, Volume and Issue: 54(22), P. 1612 - 1632

Published: April 16, 2024

Agricultural practices such as extensive manure application (containing residual antibiotics) fertilizer can also contribute to antibiotic pollution in soil, besides nitrous oxide (N2O) emissions. This dual impact designates certain agricultural soils hotspots for heightened N2O emissions and pollution. Nevertheless, our understanding of the repercussions residues on underlying mechanisms remain elusive. comprehensive literature review investigated recent research findings regarding contamination its influence microbial production consumption. We scrutinized published data field experimental monitoring results analyze prevalence temporal variation Chinese soils. By analyzing 482 log response ratio (lnR) datasets obtained from 41 independent articles, we established that quinolones (QNs) significantly (p < 0.05) boost Conversely, cycloheximide aminoglycosides (ARs) demonstrated notable inhibitory effects. Antibiotic at concentrations within 1 ppm promoted soil emissions, whereas exceeding 10 (95% CI > 0) inhibited Subsequently, changes oxidation-related microorganisms (AOM), nitrite-oxidizing bacteria (NOB), comammox bacteria, denitrifying well dissimilatory nitrate reduction ammonium (DNRA) anammox processes under stress. Antibiotics unequally affect Our offer valuable insights into complex relationship between antibiotics contributing a better environmental consequences systems.

Language: Английский

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The global potential for mitigating nitrous oxide emissions from croplands

One Earth, Journal Year: 2024, Volume and Issue: 7(3), P. 401 - 420

Published: March 1, 2024

Language: Английский

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Inhibition of nitrification to mitigate nitrate leaching and nitrous oxide emissions in grazed grassland: a review

Journal of Soils and Sediments, Journal Year: 2016, Volume and Issue: 16(5), P. 1401 - 1420

Published: April 2, 2016

Language: Английский

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