Effects of Straw Amendment in Combination with Synthetic N Fertilizer Addition on N2O, N2, and Their Stoichiometric Ratios in Three Different Agro-Ecosystems DOI Creative Commons
Fiston Bizimana, Wenxu Dong, Arbindra Timilsina

et al.

Agronomy, Journal Year: 2024, Volume and Issue: 14(5), P. 887 - 887

Published: April 24, 2024

Nitrogen (N) fertilizer and crop residue amendments are important agricultural practices that could increase soil health, fertility, yield. Such may also change denitrification processes where contradictory observations have been reported on N2O emissions with fewer studies N2 due to its large atmospheric background concentrations limiting soil-borne measurement. This study aims investigate production reduction of under a conducive denitrifying environment (like anaerobic microsites, 80% WFPS, available N C) after rice straw amendment KNO3 application three different types (fluvo-aquic, black, paddy soils). In this regard, treatments for were set consisting (a) non-amended treatment (control), (b) (KNO3, 20 mM KNO3), (c) plus (2.5 g kg−1 dry which incubated WFPS. Moreover, direct fluxes measured over 17 days in the current incubation experiment robotized system using helium atmosphere. Results showed combined increased both compared control or all types. Overall, black soils, higher fluvo-aquic soil, maximum 234.2 ± 6.3 590.1 27.3 ha−1 from F_SK treatment, respectively, during period. The general trends < treatments. Straw combination can stimulate high rate (less N2), whereas their effect stoichiometric ratios N2O/(N2O + N2) highly depends nitrate concentration, oxygen level, moisture content, labile C. underscores trigger less increment but conditions favoring denitrification.

Language: Английский

Denitrification in Agricultural Soils – Integrated control and Modelling at various scales (DASIM) DOI Creative Commons
Kristina Kleineidam,

Jürgen Böttcher,

Klaus Butterbach‐Bahl

et al.

Biology and Fertility of Soils, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract The special issue summarises and highlights key findings of the research unit DASIM funded by German Research Foundation (DFG) on process denitrification. Progress was made in several areas including development new advanced methods to quantify N 2 fluxes such as a 15 gas flux method, enhanced Raman spectroscopy incubation system study plant-soil interactions He-O atmosphere. Understanding denitrification disturbed structured soil gained combining X-ray CT scanning microbial ecology methods. High resolution models developed part were able successfully simulate experimental data provide valuable insights for improvement existing ecosystem models. Improved tracing tools analysis soil-plant systems have been that are extensively used associated partners. brought together an interdisciplinary network researchers interested analytical but also modelling aspects. This includes close collaboration with FAO/IAEA centre Nuclear Techniques Food Agriculture United Nations which resulted open access book describes DASIM. impact scientific community is manifold will most likely lasting understanding nitrogen cycling terrestrial ecosystems.

Language: Английский

Citations

0
Atmospheric nitrogen oxides (NOx), hydrogen sulphide (H2S) and carbon monoxide (CO): Boon or Bane for plant metabolism and development? DOI
Soumya Mukherjee,

Geetika Kalra,

Satish C. Bhatla

et al.

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 125676 - 125676

Published: Jan. 1, 2025

Language: Английский

Citations

0
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
Estimating field N2 emissions based on laboratory-quantified N2O/(N2O + N2) ratios and field-quantified N2O emissions DOI
Fiston Bizimana, Jiafa Luo, Arbindra Timilsina

et al.

Journal of Soils and Sediments, Journal Year: 2022, Volume and Issue: 22(8), P. 2196 - 2208

Published: May 12, 2022

Language: Английский

Citations

15
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
Lysimeter-based full fertilizer 15N balances corroborate direct dinitrogen emission measurements using the 15N gas flow method DOI Creative Commons

Irina Yankelzon,

Lexie Schilling,

Klaus Butterbach‐Bahl

et al.

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

Published: Feb. 24, 2024

Abstract The 15 N gas flux ( NGF) method allows for direct in situ quantification of dinitrogen (N 2 ) emissions from soils, but a successful cross-comparison with another is missing. objectives this study were to quantify wheat rotation using the NGF method, compare these those obtained lysimeter-based fertilizer mass balance approach, and contextualize enrichment soil air. For four sampling periods, fertilizer-derived losses method) similar unaccounted fates as approach. Total amounted 21 ± 3 kg ha − 1 , 13 (7.5% applied N) originating fertilizer. In comparison, approach overall indicated 11%, equivalent 18 . Nitrous oxide O) small (0.15 0.01 or 0.1% N), resulting large mean :(N O + ratio 0.94 0.06. Due drip fertigation, ammonia accounted < 1% fertilizer-N, while leaching was negligible. temporal variability well explained by δ air down 50 cm depth. We conclude provides realistic estimates field should be more widely used better understand losses. Moreover, combining measurements diffusion modeling might an alternative constraining emissions.

Language: Английский

Citations

3
A new incubation system to simultaneously measure N2 as well as N2O and CO2 fluxes from plant-soil mesocosms DOI Creative Commons

Irina Yankelzon,

Georg Willibald,

Michael Dannenmann

et al.

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

Published: March 12, 2024

Abstract This study presents a novel plant-soil mesocosm system designed for cultivating plants over periods ranging from days to weeks while continuously measuring fluxes of N 2 , O and CO . For proof concept, we conducted 33-day incubation experiment using six soil mesocosms, with three containing germinated wheat left plant-free. To validate the magnitude fluxes, used 15 N-enriched fertilizer mass balance approach. The inherent leakage rate was about 55 µg m − h 1 rates were below detection limit (< ). In our experiment, found higher cumulative gaseous + losses in sown (0.34 ± 0.02 g ) as compared bare (0.23 0.01 accounted approximately 94–96% total both planted unplanted mesocosms. losses, determined by approach, be 1.7 0.5 0.6 soil, indicating an inconsistency between two assessment methods. Soil respiration also aboveground biomass reaching 4.8 0.1 4.0 C period, respectively. Overall, this measured effect growth on denitrification, highlighting sensitivity utility advanced such studies.

Language: Английский

Citations

3
Soil CH4 and N2O response diminishes during decadal soil warming in a temperate mountain forest DOI Creative Commons
Jakob Heinzle, Barbara Kitzler,

Sophie Zechmeister‐Boltenstern

et al.

Agricultural and Forest Meteorology, Journal Year: 2022, Volume and Issue: 329, P. 109287 - 109287

Published: Dec. 27, 2022

Global warming is considered to impact the fluxes of methane (CH4) and nitrous oxide (N2O) between forest soils atmosphere, but it unclear whether responses change over time. In this study response soil CH4 N2O field (+4 °C) were determined during years 2–5 14–16 in a experiment temperate forest. second sixteenth year warming, temperature sensitivities assessed in-situ by gradually rising temperatures ∼10 °C above ambient within short period three four days. Production dinitrogen (N2) was measured ex-situ warming. Soil significantly reduced uptake (-19.5%) increased emissions (+41.6%) first whereas no effects on observed later years. Dinitrogen production up ten times higher than production, though high spatiotemporal variability masked any significant N2 fluxes. Temperature (Q10) for 2.07 4.06, respectively, 1.52 1.79, The diminishing likely caused longer-term changes N availability and/or simultaneous acclimation microbial community moisture largely unaffected alone only weak predictor Methane therefore can be expected generally less affected Overall, our results suggest that has limited transient type

Language: Английский

Citations

14
In situ nitrous oxide and dinitrogen fluxes from a grazed pasture soil following cow urine application at two nitrogen rates DOI
Keren Ding, Jiafa Luo, Timothy J. Clough

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 838, P. 156473 - 156473

Published: June 2, 2022

Language: Английский

Citations

13
Modeling Denitrification: Can We Report What We Don't Know? DOI Creative Commons
Balázs Grosz, Amanda Matson, Klaus Butterbach‐Bahl

et al.

AGU Advances, Journal Year: 2023, Volume and Issue: 4(6)

Published: Oct. 29, 2023

Abstract Biogeochemical models simulate soil nitrogen (N) turnover and are often used to assess N losses through denitrification. Though a complete budget, only subset of pools/fluxes (i.e., 2 O, , NH 3 NO x ) published since the full budget cannot be validated with measured data. Field studies rarely include balances, especially fluxes, which difficult quantify. Limiting publication modeling results based on available field data represents missed opportunity improve understanding modeled processes. We propose that modeler community support all simulated pools processes in future studies.

Language: Английский

Citations

8