農地土壌におけるバイオ炭利用：ブドウ園の生産性への影響と炭素回収・貯留の可能性
The use of biochar in agricultural soils: Impacts on vineyard productivity and the potential for carbon capture and sequestration (原題)
Leonel J. R. Nunes
🤖 gxceed AI 要約
日本語
ブドウ園へのバイオ炭施用に関する統合的レビュー。収量増は酸性・炭素乏乏・非灌漑のトスカーナ3圃場に限られ、他8地点では有意な収量応答はなかった。一方、バイオ炭炭素の長期残留は頑健で、100年後も65〜89%が残存。N2O・CH4削減効果は圃場規模では未確認。炭素価格€90〜243/t CO2-eqが收支分岐点となる。
English
Integrative review of biochar in vineyards. Yield gains appeared only in three acidic, carbon-poor, non-irrigated Tuscan sites (+16–67%), while eight other comparisons showed no significant response; soil water and organic carbon gains were more consistent. Biochar carbon persistence is robust (65–89% remaining at 100 years), but field-scale N2O/CH4 reductions are unconfirmed. Break-even carbon price is €90–243/t CO2-eq.
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
J-クレジットや農林業由来の炭素除去クレジット、SSBJのScope 3・バリューチェーン排出量算定において、バイオ炭施用の炭素貯留をどう計測・検証するかの基礎資料になる。農業セクターの気候移行計画やサプライチェーン脱炭素の議論にも示唆。
In the global GX context
Relevant to carbon-removal accounting under voluntary markets and emerging frameworks (CSRD, ISSB) where biochar is claimed as a durable removal. The paper's evidence grading and break-even carbon price analysis help disclosure teams avoid overstating agronomic and GHG co-benefits in climate transition plans.
👥 読者別の含意
🔬研究者:バイオ炭の収量効果と炭素貯留のエビデンス強度を整理した点が有用で、土壌・気候条件別の再現研究の必要性を示す。
🏢実務担当者:農業・食品企業がバイオ炭を炭素除去として主張する際、収量効果やGHG削減の過大評価を避ける根拠になる。
🏛政策担当者:炭素除去クレジット制度や農業気候政策で、バイオ炭の貯留量算定と経済性評価の基準設計に参考となる。
📄 Abstract（原文）
Background Viticulture is increasingly exposed to water deficit, heat and soil degradation, prompting interest in biochar as a soil amendment that may simultaneously improve productivity and sequester carbon. Methods This integrative review used a documented Scopus search (June 2026), targeted searches (September 2026), explicit eligibility criteria and a PRISMA-style flow diagram. All vineyard field trials were tabulated, meta-analyses were reported with effect and sample sizes, and each conclusion was graded by level of evidence. Results Significant yield gains were confined to three Tuscan vineyards amended with the same 500 °C orchard-pruning biochar on acidic to neutral, carbon-poor, non-irrigated soils (+16% to +67% per harvest, persisting ten years after application), and eight site-level comparisons, six in humid-temperate, cool or calcareous-alkaline settings, showed no significant yield response, whereas increases in soil water and topsoil organic carbon were more consistent. The most robust climate outcome is the persistence of the biochar carbon (inert fraction unchanged after 15 years, 65–89% remaining after 100 years), whereas N2O and CH4 reductions are not robust at field scale and remain undetected in vineyards. The previously cited 7.5 Mg CO2-eq ha-1 yr-1, the mean of all soil‑carbon practices in vineyards, rests on very few biochar observations, whereas a single 16.5 t ha-1 (dry) application stores 31–42 Mg CO2-eq ha-1 over 100 years before life-cycle emissions. Without a yield response, the break-even carbon price for biochar costing €200–500 t-1 is €90–243 per t CO2-eq, against a carbon-removal index of €135 (2026), and a single application requires 22–48 years of a vineyard's own prunings. Conclusions Carbon storage in the biochar itself is well supported, agronomic benefits are demonstrated only for a narrow pedoclimatic domain and require independent replication, and greenhouse-gas co-benefits, long-term microbial effects, economic viability and large-scale carbon farming remain plausible but poorly documented or speculative.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.scitotenv.2026.182381first seen 2026-10-28 04:55:46 · last seen 2026-11-06 04:52:58
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