The electrochemical mechanism of biochar for mediating the product ratio of N2O/(N2O + N2) in the denitrification process DOI
Xiaowan Liu,

Xingren Liu,

Shangjie Gao

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 951, P. 175566 - 175566

Published: Aug. 15, 2024

Language: Английский

Threshold-like effect of soil NO3− concentrations on denitrification product N2O/(N2O+N2) ratio is mediated by soil pH DOI
Bowen Zhang, Minghua Zhou, Bo Zhu

et al.

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

Published: Oct. 14, 2023

Language: Английский

Citations

14
Reducing nitrogen fertilizer applications mitigates N2O emissions and maintains sugarcane yields in South China DOI

Zhuoting Li,

Qiangsheng Xu,

Yanni Lu

et al.

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 377, P. 109250 - 109250

Published: Aug. 22, 2024

Language: Английский

Citations

5
Determining N2O and N2 fluxes in relation to winter wheat and sugar beet growth and development using the improved 15N gas flux method on the field scale DOI Creative Commons

Jonas Eckei,

Reinhard Well, Martin Maier

et al.

Biology and Fertility of Soils, Journal Year: 2024, Volume and Issue: unknown

Published: April 4, 2024

Abstract The objectives of this field trial were to collect reliable measurement data on N 2 emissions and O/(N O + ) ratios in typical German crops relation crop development provide a dataset test improve biogeochemical models. winter wheat (WW, Triticum aestivum L.) sugar beet (SB, Beta vulgaris subsp. measured using the improved 15 gas flux method with helium–oxygen flushing (80:20) reduce atmospheric background < 2%. To estimate total production soil, production-diffusion modelling was applied. Soil samples taken regular intervals analyzed for mineral (NO 3 − NH 4 water-extractable Corg content. In addition, we monitored soil moisture, development, plant uptake, transformation processes translocation deeper layers. Our best estimates cumulative losses 860.4 ± 220.9 mg m −2 553.1 96.3 over experimental period 189 161 days 0.12 0.15 WW SB, respectively. Growing plants affected all controlling factors denitrification, dynamics clearly differed between species. Overall, highest when water uptake low, i.e., during early growth stages, ripening, after harvest. We present first plot-scale study employing growing season showing that drivers fluxes differ species change throughout season.

Language: Английский

Citations

4
Informing APSIM using 15N recovery data to establish fertiliser N budgets in grain systems DOI Creative Commons
Naoya Takeda, Johannes Friedl, Stephen Leo

et al.

Nutrient Cycling in Agroecosystems, Journal Year: 2025, Volume and Issue: unknown

Published: April 13, 2025

Language: Английский

Citations

0
Hybrid pathways of denitrification drive N2O but not N2 emissions from an acid-sulphate sugarcane soil DOI Creative Commons
Robert Kirkby, Johannes Friedl, Daniele De Rosa

et al.

Biology and Fertility of Soils, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 3, 2024

Abstract Acid-sulphate sugarcane soils in the subtropics are known hot-spots for nitrous oxide (N 2 O) emissions, yet reduction of reactive N O to non-reactive dinitrogen ) via specific pathways remains a major uncertainty nitrogen (N) cycling and loss from these soils. This study investigated magnitude O:N partitioning losses subtropical acid-sulphate soil under production using 15 gas flux method, establishing contribution hybrid (co- chemo-denitrification) heterotrophic denitrification losses. Soils were fertilised with potassium nitrate, equivalent 25 50 kg ha −1 , watered close saturation then incubated over 30 days. An innovative, fully automated incubation system coupled an isotope-ratio mass-spectrometer enabled real time analysis at sub-diel resolution. Peak reached 6.5 day totalling > O+N -N . Emissions dominated by accounting more than 57% losses, demonstrating that proceeded even highly acidic conditions. Over 40% O, but only 2% produced pathways. These findings demonstrate generally limited production, likely driven high organic matter content low pH, promoting both biotic, abiotic nitrosation. Regardless underlying process, emissions demonstrates environmental, also potential agronomic significance, formation

Language: Английский

Citations

3
Denitrification Losses in Response to N Fertilizer Rates—Integrating High Temporal Resolution N2O, In Situ 15N2O and 15N2 Measurements and Fertilizer 15N Recoveries in Intensive Sugarcane Systems DOI Creative Commons
Naoya Takeda, Johannes Friedl, Robert Kirkby

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2023, Volume and Issue: 128(9)

Published: Aug. 28, 2023

Abstract Denitrification is a key process in the global nitrogen (N) cycle, causing both nitrous oxide (N 2 O) and dinitrogen ) emissions. However, estimates of seasonal denitrification losses O + N are scarce, reflecting methodological difficulties measuring soil‐borne emissions against high atmospheric background challenges regarding their spatio‐temporal upscaling. This study investigated response to fertilizer rates (0, 100, 150, 200, 250 kg ha −1 on two intensively managed tropical sugarcane farms Australia, by combining automated monitoring, situ measurements using 15 gas flux method recoveries at harvest. Dynamic changes O/(N ratio (<0.01 0.768) were explained fitting generalized additive mixed models (GAMMs) with soil factors upscale temporal‐resolution data daily over season. Cumulative ranged from 12 87 , increasing non‐linearly rates. Emissions accounted for 31%–78% dominated environmentally benign The contribution loss decreased rates, suggesting significance other pathways including leaching runoff higher delivers blueprint approach extrapolate temporal spatial scales, which can be applied fertilized agroecosystems. Robust determined this will help improve cropping system modeling approaches, advancing our understanding cycle across scales.

Language: Английский

Citations

4
Sediment nitrate dissimilatory reduction processes in the river-lake ecotone of Poyang Lake, China: Mechanisms and environmental implications DOI

Yinghui Jiang,

Zhenglei Xie, Mingjun Ding

et al.

Journal of Soils and Sediments, Journal Year: 2024, Volume and Issue: 24(10), P. 3515 - 3529

Published: Aug. 28, 2024

Language: Английский

Citations

1
The Electrochemical Mechanism of Biochar for Mediating the Product Ratio of N2o/(N2o + N2) in the Denitrification Process DOI
Xiaowan Liu,

Xingren Liu,

Shangjie Gao

et al.

Published: Jan. 1, 2024

Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI

Language: Английский

Citations

0
Constraining source pathways, magnitude and product stoichiometry of N2O and N2 emissions from Australian sugarcane growing soils DOI Creative Commons
Robert Kirkby

Published: Jan. 1, 2024

This research investigates nitrogen (N) fertilizer losses in Australian agriculture- focusing on denitrification and associated nitrous oxide (N2O) emissions, a potent greenhouse gas contributing to climate change. Challenges accurately measuring denitrification, exacerbated by episodic emissions the 78% atmospheric N2 background hinder accurate measurement understanding. study develops an automated 15N2+15N2O isotope monitoring system for sub-daily N analysis process level sources of N2O+N2 from sugarcane soils. Findings inform understanding enhance simulation models, aiding sustainable agricultural practices amidst regulatory pressures environmental concerns.

Language: Английский

Citations

0
The electrochemical mechanism of biochar for mediating the product ratio of N2O/(N2O + N2) in the denitrification process DOI
Xiaowan Liu,

Xingren Liu,

Shangjie Gao

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 951, P. 175566 - 175566

Published: Aug. 15, 2024

Language: Английский

Citations

0