Challenges of accounting nitrous oxide emissions from agricultural crop residues

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(24), P. 6846 - 6855

Published: Oct. 6, 2023

Crop residues are important inputs of carbon (C) and nitrogen (N) to soils thus directly indirectly affect nitrous oxide (N2 O) emissions. As the current inventory methodology considers N by crop as sole determining factor for N2 O emissions, it fails consider other underlying factors processes. There is compelling evidence that emissions vary greatly between with different biochemical physical characteristics, concentrations mineralizable decomposable C in residue biomass both enhancing soil production potential. High these components associated immature (e.g., cover crops, grass, legumes, vegetables) opposed mature straw). A more accurate estimation short-term (months) effects on could involve distinguishing distinctly emission factors. The medium-term (years) long-term (decades) relate management fertility chemical properties, considering affected local climatic conditions well land use management. More targeted mitigation efforts after addition soil, urgently needed require an improved accounting. This work needs be underpinned research (1) develop validate residues, (2) assess from belowground terminated (3) improve activity data types, particular (4) evaluate

Language: Английский

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Energy crop-based rhizoremediation and lignocellulosic biomass production as sustainable bioeconomy-driven solution for biofuel generation and waste mitigation

Progress in Energy and Combustion Science, Journal Year: 2024, Volume and Issue: 103, P. 101161 - 101161

Published: June 4, 2024

Language: Английский

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Comparative role of calcium oxide nanoparticles and calcium bulk fertilizer to alleviate cadmium toxicity by modulating oxidative stress, photosynthetic performance and antioxidant-defense genes expression in alfalfa

Plant Physiology and Biochemistry, Journal Year: 2024, Volume and Issue: 215, P. 109002 - 109002

Published: July 31, 2024

Language: Английский

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Study on Tending Countermeasures to Enhance Forest Carbon Fixation and Oxygen Emission Ability

Sustainable civil infrastructures, Journal Year: 2025, Volume and Issue: unknown, P. 415 - 426

Published: Jan. 1, 2025

Language: Английский

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Hot or Not? An Evaluation of Methods for Identifying Hot Moments of Nitrous Oxide Emissions From Soils

Journal of Geophysical Research Biogeosciences, Journal Year: 2025, Volume and Issue: 130(1)

Published: Jan. 1, 2025

Abstract Effectively quantifying hot moments of nitrous oxide (N 2 O) emissions from agricultural soils is critical for managing this potent greenhouse gas. However, we are challenged by a lack standard approaches identifying moments, including (a) determining thresholds above which considered and (b) considering seasonal variation in the magnitude frequency distribution net N O fluxes. We used one year hourly flux measurements 16 autochambers that varied conventionally tilled maize field central Illinois, USA, to compare three identify moment thresholds: deviations (SD) mean, 1.5x interquartile range (IQR), isolation forest (IF) identification anomalous values. also compared these on seasonally subdivided data (early, late, non‐growing seasons) versus whole year. Our analyses revealed IQR method best identified moments. In contrast, using or 4 SD both yielded threshold values too high, IF low, leading missed low fluxes mischaracterized as respectively. Furthermore, subdividing set not only facilitated smaller late‐ seasons when were generally but it increased early growing season larger. Consequently, methods evaluated here, recommend sets

Language: Английский

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Water scarcity in semi-arid California compromises perennial alfalfa’s high yield and carbon sinking potentials

Agricultural Water Management, Journal Year: 2025, Volume and Issue: 308, P. 109284 - 109284

Published: Jan. 15, 2025

Language: Английский

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Plant Biomass Allocation-Regulated Nitrogen and Phosphorus Addition Effects on Ecosystem Carbon Fluxes of a Lucerne (Medicago sativa ssp. sativa) Plantation in the Loess Plateau

Plants, Journal Year: 2025, Volume and Issue: 14(4), P. 561 - 561

Published: Feb. 12, 2025

Nitrogen (N) and phosphorus (P) are key limiting factors for carbon (C) fluxes in artificial grasslands. The impact of their management on ecosystem C fluxes, including net productivity (NEP), respiration (ER), gross (GEP) the Loess Plateau is unclear. An experiment was conducted to study changes these with varying N (0, 5, 10, 15, 20 g m-2) P (0 10 additions from 2022 2023 a lucerne plantation. Results showed that addition positively influenced NEP GEP first year after planting at rate m-2 optimal assimilation, but it had negligible effect ER both two years studied (Medicago sativa ssp. sativa) Phosphorus significantly increased stimulated GEP, resulting an increasing only early stage planting. enhanced soil availability further improved leaf chemical stoichiometry characteristics, leading biomass distribution. more belowground under aboveground production resulted different responses addition. results suggest effects fertilization cycle may be largely dependent distribution above- plant grassland ecosystem.

Language: Английский

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Triple oxygen isotope evidence for the pathway of nitrous oxide production in a forested soil with increased emission on rainy days

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Continuous increases in atmospheric nitrous oxide (N₂O) concentrations are a global concern. Both nitrification and denitrification the major pathways of N₂O production soil, one most important sources tropospheric N₂O. The ¹⁷O excess (Δ¹⁷O) can be promising signature for identifying main pathway soil. However, reports on Δ¹⁷O limited. Thus, we determined temporal variations emitted from forested soil more than year that nitrite (NO₂⁻), which is possible source O atoms We found exhibited significantly higher values rainy days (+ 0.12 ± 0.13‰) fine (− 0.30 0.09‰), emission flux was (38.8 28.0 µg N m^{− 2} h^{− 1}) (3.8 3.1 1). Because were close to those NO₂⁻ 0.23 0.12‰) O₂ 0.44‰), concluded although days, became active resulting significant increase This study reveals identified by precisely determining comparing with NO₂⁻, O₂, H₂O

Language: Английский

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Alfalfa yield estimation using the combination of Sentinel-2 and meteorological data

Field Crops Research, Journal Year: 2025, Volume and Issue: 326, P. 109857 - 109857

Published: March 19, 2025

Language: Английский

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Costs of transitioning the livestock sector to net-zero emissions under future climates

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: April 23, 2025

Abstract Land managers are challenged with the need to balance priorities in production, greenhouse gas (GHG) abatement, biodiversity and social license operate. Here, we develop a transdisciplinary approach for prioritising land use, illustrated by co-designing pathways transitioning farming systems net-zero emissions. We show that few interventions enhanced productivity profitability while reducing GHG Antimethanogenic feed supplements planting trees afforded greatest mitigation, revenue diversification wind turbines adoption of livestock genotypes feed-conversion efficiency (FCE) were most conducive improving profit. Serendipitously, intervention lowest licence—continuing status quo purchasing carbon credits offset emissions—was also costly pathway transition net-zero. In contrast, stacking several mitigate enteric methane, improve FCE sequester entirely negated enterprise emissions profitable way. conclude costs lower when bundled and/or evoke co-benefits.

Language: Английский

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