Greenhouse Gas Flux Response in Biochar‐ and Compost‐Amended Lawn Soils Under Simulated Water Saturation Conditions
バイオチャー・堆肥施用芝生土壌における模擬飽和条件下の温室効果ガスフラックス応答 (AI 翻訳)
Angel Salinas, Chu‐Lin Cheng, Engil Pereira, Rafael M. Almeida, James Jihoon Kang
🤖 gxceed AI 要約
日本語
芝生土壌にバイオチャー・堆肥を施用し、飽和・半飽和・不飽和条件でのCO2・CH4・N2Oフラックスを測定。堆肥区でCO2放出が高く、バイオチャー区は保水性が高い一方、飽和時にCH4とN2Oのパルスが発生。施用資材と温度・水分条件がGHG排出に及ぼす影響を示した。
English
A mesocosm study measured CO2, CH4, and N2O fluxes from turfgrass soil amended with biochar, compost, or both under varying water-table conditions. Compost-amended soils emitted more CO2, while biochar retained more soil moisture. Saturation triggered CH4 peaks and N2O pulses, highlighting trade-offs in using soil amendments for urban climate mitigation.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の都市緑地・芝生管理ではGHG排出削減が政策的課題となりつつあるが、本結果はバイオチャー等の土壌改良材が保水性と排出のトレードオフを持つことを示す。SSBJ等の情報開示には直接結びつかないが、都市の気候変動適応・緩和策の基礎資料となる。
In the global GX context
Adds empirical evidence on how biochar and compost amendments affect GHG fluxes and soil moisture in urban lawns, relevant to nature-based climate solutions discourse. Useful for landscape-scale carbon accounting and urban sustainability reporting beyond traditional corporate boundaries.
👥 読者別の含意
🔬研究者:Provides empirical flux data on biochar/compost trade-offs under saturation, useful for modeling urban soil GHG budgets.
🏢実務担当者:Landscape and green-infrastructure teams can use these results to consider moisture retention vs. GHG emission trade-offs in urban soil management.
🏛政策担当者:Informs urban land-use and climate mitigation policy on soil amendment choices, though the unreplicated design limits direct prescriptive use.
📄 Abstract（原文）
ABSTRACT Understanding greenhouse gas emission dynamics in lawn soils is important for improving climate change mitigation strategies in urban and suburban landscapes. In this greenhouse mesocosm study, carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) fluxes were measured from 12 turfgrass soil columns arranged in an unreplicated, completely randomized 4 × 3 factorial design. Four amendment treatments (biochar, compost, bio‐com [1:1 volume ratio of biochar and compost], and unamended control) were combined with three water‐table conditions (full saturation, half saturation, and unsaturated), with a single column representing each treatment combination. Columns were irrigated at 1 cm day −1 for 24 days, followed by 14 days of contrasting water‐table conditions and a 25‐day drying period without irrigation. When averaged across all water‐table conditions, compost‐amended columns (compost or bio‐com) produced higher CO 2 fluxes (∼6 µmol m −2 s −1 ) than biochar‐amended and control columns (4.5–5.0 µmol m −2 s −1 ). CO 2 fluxes were positively correlated with air temperature and negatively correlated with soil moisture. Biochar‐amended columns maintained high soil moisture (∼95%) throughout the study, demonstrating its greater moisture retention than compost‐amended columns (<23%). During saturation and subsequent drainage, CH 4 fluxes peaked at 324 nmol m −2 s −1 , whereas N 2 O fluxes exhibited a transient pulse, reaching 5–8 nmol m −2 s −1 . Overall, amendment type and temperature primarily regulated CO 2 emissions, whereas water‐table conditions had a stronger influence on CH 4 emissions and the occurrence of N 2 O emission pulses.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1002/clen.70254first seen 2026-07-31 07:27:05
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