Threshold-like effect of soil NO3− concentrations on denitrification product N2O/(N2O+N2) ratio is mediated by soil pH

Soil Biology and Biochemistry, Journal Year: 2023, Volume and Issue: 187, P. 109213 - 109213

Published: Oct. 14, 2023

Language: Английский

---

Modeling denitrification nitrogen losses in China's rice fields based on multiscale field‐experiment constraints

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(2)

Published: Feb. 1, 2024

Denitrification plays a critical role in soil nitrogen (N) cycling, affecting N availability agroecosystems. However, the challenges direct measurement of denitrification products (NO,

Language: Английский

---

Warming exacerbates global inequality in forest carbon and nitrogen cycles

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

Published: Oct. 24, 2024

Forests are invaluable natural resources that provide essential services to humanity. However, the effects of global warming on forest carbon and nitrogen cycling remain uncertain. Here we project a decrease in total input accumulation by 7 ± 2 28 9 million tonnes (Tg), respectively, an increase reactive losses environment 3 Tg for 2100 due fossil-fueled society. This would compromise sink capacity 0.45 0.14 billion annually. Furthermore, warming-induced inequality cycles could widen economic gap between Global South North. High-income countries estimated gain US$179 benefits from assets under warming, while other regions face net damages US$31 billion. Implementing climate-smart management, such as comprehensive restoration optimizing tree species composition, is imperative future climate change.

Language: Английский

---

Global Warming Has Imbalance Impact on Soil Nitrogen Transformation Rates

Earth s Future, Journal Year: 2025, Volume and Issue: 13(3)

Published: March 1, 2025

Abstract Global warming is projected to significantly influence soil nitrogen (N) transformations, yet a comprehensive understanding of the spatial distribution these effects and underlying driving factors at large scale remains limited. This study employs Random Forest model develop nonlinear temperature sensitivity ( Q 10 ) models for mineralization (N min ), nitrification nit denitrification de based on data set comprising 1,131 records from across China. Our results revealed variations in values different N transformation processes ecosystem types, with an average 1.96 , 1.90 2.19 . Higher (>2) rates were observed Northern Western China, which exhibited geographical pattern that changed longitude, latitude, altitude. Soil substrate availability, input, pH climatic variables accounted most variation among diverse types regions scale. In future scenarios, it expected could increase by between 0.001 1.87 times under SSP2‐4.5 SSP5‐8.5 2040 2100, compared 2030. These findings deepen our large‐scale controlling response global warming, providing robust foundation more informed management environmental policy decisions.

Language: Английский

---

Positive Feedback on Climate Warming by Stream Microbial Decomposers Indicated by a Global Space‐For‐Time Substitution Study

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

ABSTRACT Decomposition of plant litter is a key ecological process in streams, whose contribution to the global carbon cycle large relative their extent on Earth. We examined mechanisms underlying temperature sensitivity (TS) instream decomposition and forecast effects climate warming this process. Comparing data from 41 globally distributed sites, we assessed TS microbial total using nine species combined six mixtures. Microbial conformed metabolic theory ecology its was consistently higher than that decomposition, which found previously. Litter quality influenced difference between with more recalcitrant being sensitive temperature. Our projections suggest (i) will enhance increasing CO 2 outgassing intensifying trend, especially colder regions; (ii) riparian composition have major influence

Language: Английский

---

Large underestimations of warming-induced soil carbon emissions from oversimplistic Q10 indicator

Soil Biology and Biochemistry, Journal Year: 2025, Volume and Issue: 207, P. 109839 - 109839

Published: April 28, 2025

Language: Английский

---

Monthly Diurnal Variations in Soil N2O Fluxes and Their Environmental Drivers in a Temperate Forest in Northeastern China: Insights from Continuous Automated Monitoring

Forests, Journal Year: 2025, Volume and Issue: 16(5), P. 766 - 766

Published: April 30, 2025

Global warming, driven by increased greenhouse gas emissions, is a critical global concern. However, long-term trends in emissions remain poorly understood due to limited year-round data. The automated chamber method was used for continuous monitoring of soil N2O fluxes mixed forest Northeast China’s Changbai Mountains, analyzing monthly diurnal patterns and their relationships with temperature (Ts) volumetric water content (VWC). results revealed significant seasonal variations, peak at 11:00 during the growing season (May–October) elevated nighttime winter (March, April, November, December). optimal sampling time 14:00, closely reflecting daily mean fluxes. Soil Ts VWC were key drivers, variability effects: showed no relationship January but strong correlations February March. Q10 values ranged from 0.4 7.2 (mean = 2.5), indicating high-temperature sensitivity. effects complex, moderate promoting denitrification excessive suppressing microbial activity. These findings provide insights optimizing improving emission estimates.

Language: Английский

---

Combined alkali-photocatalytic stimulation enables click microbial domestication for boosted ammonia nitrogen removal

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 478, P. 135417 - 135417

Published: Aug. 5, 2024

Language: Английский

---

Methane Production Is More Sensitive to Temperature Increase than Aerobic and Anaerobic Methane Oxidation in Chinese Paddy Soils

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(42), P. 18723 - 18732

Published: Oct. 13, 2024

Methane emissions from paddy fields can increase under future warming scenarios. Nevertheless, a comprehensive comparison of the temperature sensitivity methane-related microbial processes remains elusive. Here, we revealed that methane production (activation energy (Ea) = 0.94 eV; 95% confidence interval (CI), 0.78–1.10 eV) and aerobic (Ea 0.49 CI, 0.34–0.65 anaerobic 0.46 0.30–0.62 oxidation exhibited notable spatial heterogeneity across 12 Chinese spanning 35° longitude 18° latitude. In addition, Ea values were significantly positively negatively correlated to latitude, respectively, while there was no significant correlation between Overall, soil factors had effect on production. The primarily influenced by contents ammonium clay, whereas mainly conductivity. Despite variation, overall higher than at continental scale; therefore, an in emission will be predicted warming. Taken together, our study characteristics simultaneously fields, highlighting potential roles influencing sensitivity.

Language: Английский

---

Effects of nitrification inhibitor and maize straw application on N2O and N2 emissions from two agricultural soils: A 15N tracer study

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: July 4, 2024

Background and Aims: The application of nitrification inhibitor (NI) crop straw with nitrogen (N) fertilizer is a common practice to increase soil N conservation use in cropping systems. However, their effects on gaseous emission from soils are less understood, especially for N₂. Methods: We conducted 60-day incubation experiment study the NI or maize N₂O N₂ emissions two typical upland soils, namely Mollisol an Inceptisol contrasting pH values, fertilized ¹⁵N-labeled urea. Results: During period, cumulative urea-only addition treatment were 0.5 12 mg kg^-1 soil, respectively, while they 15 176 Inceptisol. The co-application (dicyandiamide) decreased by 66%-72% both 81% it increased 15% Mollisol. also 60% 4% Inceptisol, but 75%-96% soils. Interestingly, after incorporation mainly soil-derived rather than fertilizer-derived either soil. Conclusions: Our findings reveal that applications have various impacts different could be promising measure reduce high losses following fertilization.

Language: Английский

---