気候スマート農業実践の土壌炭素隔離ポテンシャル：批判的レビュー
Soil Carbon Sequestration Potential of Climate-Smart Agronomic Practices: A Critical Review (原題)
V. V. Namitha, YM Shukla, Ram Gopal, Satyamaya Satapathy, Ananya Priyadarshinee, Mayank Kumar, Rajeev Kumar, Narinder Panotra, Gayatri Jamwal, Rajeshkumar Kishorkumar Panchal
🤖 gxceed AI 要約
日本語
被覆作物、輪作多様化、残渣保持、不耕起、有機資材、バイオ炭等の土壌炭素隔離効果を検証した批判的レビュー。植物由来炭素入力の維持・増加と実践の組合せが最も一貫した証拠を持つ一方、攪乱低減だけでは全層の大幅増加は期待できないと指摘。輸入資材は受入土壌の炭素を増やしても景観規模の追加除去を証明しない点、N2O・CH4や管理反転が気候収支を変え得る点を強調。土壌回復とオフセット認証を分離し、多深度・長期実験を最優先と結論づける。
English
A critical review of soil carbon sequestration from cover cropping, diversified rotations, residue retention, reduced tillage, organic amendments, biochar and agroforestry in mineral soils. It finds the most consistent evidence supports maintaining plant-derived carbon inputs and combining compatible practices, while disturbance reduction alone rarely yields whole-profile gains. Imported amendments and biochar require careful additionality and decay accounting, and N2O, CH4 and management reversals can alter the climate balance. It urges separating soil restoration from offset certification and prioritising long-term, multi-depth experiments.
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
日本では農地土壌炭素貯留がJ-クレジット制度やみどりの食料システム戦略の文脈で注目されるが、本レビューは「土壌回復」と「オフセット認証」の分離を求め、国内クレジット制度設計や農業法人の炭素会計実務に慎重な示唆を与える。
In the global GX context
As voluntary soil carbon credits and regenerative agriculture claims expand under CSRD/ISSB and offset markets, this review's insistence on distinguishing measured stocks from additional removal, and on equivalent soil mass and sampling depth, directly informs credible offset certification and Scope 3 agricultural accounting.
👥 読者別の含意
🔬研究者:土壌炭素の測定深度・等価土壌質量・モデル対実測の区別を整理した枠組みは、隔離研究の比較可能性を高める。
🏢実務担当者:農業・食品企業が土壌炭素クレジットや再生農業調達を主張する際、追加性とN2O収支の検証を求める根拠になる。
🏛政策担当者:J-クレジット等の土壌炭素認証制度設計で、土壌回復とオフセット認証を分離すべき根拠を提供する。
📄 Abstract（原文）
Agricultural soils can contribute to climate mitigation through management that increases organic carbon inputs, limits avoidable losses and sustains favourable conditions for carbon retention. Yet higher soil carbon concentrations, larger stocks relative to conventional management and additional atmospheric carbon removal are not interchangeable outcomes. This critical narrative review evaluates the sequestration potential of cover cropping, diversified rotations, residue retention, reduced tillage, organic amendments, biochar, balanced nutrient management, water management and agroforestry in predominantly mineral agricultural soils. Verified scholarly literature with publication coverage through 30 July 2026 was synthesised according to intervention mechanisms, measurement validity, temporal persistence and whole-system greenhouse gas consequences. The most consistent evidence supports maintaining or increasing plant-derived inputs and combining compatible practices, rather than assuming that disturbance reduction alone produces substantial whole-profile gains. Cover crops commonly increase topsoil carbon, but responses depend on biomass production, growing windows, water availability and nitrogen management. Imported amendments can enlarge receiving-soil stocks without demonstrating equivalent additional removal at landscape scale. Biochar offers a distinct persistence pathway, conditional on feedstock sourcing, production emissions and realistic decay accounting. Evidence on mineral-associated carbon clarifies mechanisms but does not convert unfilled stabilisation capacity into an immediately attainable mitigation budget. Apparent disagreement among studies frequently reflects differences in sampling depth, equivalent soil mass, controls, duration and the distinction between measured and modelled outcomes. Nitrous oxide, methane, displaced biomass uses and subsequent management reversals can materially change the climate balance. A defensible implementation strategy therefore separates soil restoration from offset certification, prioritises locally feasible management packages and combines repeated stock measurements with independently evaluated models. Long-term, multi-depth experiments that jointly measure carbon, greenhouse gases, yields and resource costs are the highest research priority. Soil carbon management is a conditional, finite and valuable complement to emissions reduction, not a substitute for it.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.9734/jabb/2026/v29i104518first seen 2026-10-26 04:38:44 · last seen 2026-11-05 04:51:56
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