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多様な土地利用システムにおける統合農業システムの土壌有機炭素蓄積と炭素隔離に対する10年間の影響

Decadal Impact of an Integrated Farming System on Soil Organic Carbon Stock and Carbon Sequestration across Diverse Land Use Systems (原題)

Surender Kumar, Sheikh Amjid, Toiba Gul, Ravi Kumar, Umer Jabbar, Gajveer Meena, Sofi Basit Zahoor, Bhim Singh, Suhail Raj Rana, Naresh Kumar Yadav, Naveena, Ibtisam Irshad

International Journal of Plant & Soil Science📚 査読済 / ジャーナル2026-09-10#気候科学Origin: Global対象セクター: agriculture
DOI: 10.9734/ijpss/2026/v38i96318
原典: https://doi.org/10.9734/ijpss/2026/v38i96318

🤖 gxceed AI 要約

日本語

インド・ジャンムーの10年経過した統合農業システム(IFS)と慣行の稲作・小麦連作(EFFS)を比較し、深さ別の土壌有機炭素(SOC)蓄積量を評価した。IFSは60cm深までで38.91 Mg C ha⁻¹を蓄積し、EFFS(26.34 Mg C ha⁻¹)より約48%多い。表層の炭素隔離はIFSで最大7.90 Mg C ha⁻¹、EFFSではマイナス(–0.65)となり、IFSの炭素蓄積ポテンシャルが示された。

English

A decade-old integrated farming system (IFS) in Jammu, India, was compared with conventional continuous rice–wheat farming (EFFS) for depth-wise soil organic carbon (SOC) stock. IFS stored 38.91 Mg C ha⁻¹ to 60 cm, about 48% more than EFFS (26.34 Mg C ha⁻¹). Surface carbon sequestration reached 7.90 Mg C ha⁻¹ under IFS versus a negative value (–0.65) under EFFS, demonstrating IFS's greater soil carbon accumulation potential.

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

日本では農地炭素貯留はJ-クレジット(農地土壌炭素貯留方法論)や環境省の農業由来CO2削減策と関連する。本論文は統合農業システムの定量的な炭素蓄積効果を示し、国内の農地炭素クレジット設計や営農型太陽光との複合システム検討に示唆を与える。

In the global GX context

Globally, soil carbon sequestration is central to agriculture's climate mitigation role and emerging carbon farming schemes (e.g., EU Carbon Removal Certification Framework, voluntary soil carbon credits). This decade-long field evidence from India adds empirical depth on integrated farming systems as a nature-based pathway, relevant to MRV design and carbon accounting methodologies for agricultural offsets.

👥 読者別の含意

🔬研究者:統合農業システムの長期土壌炭素蓄積データを提供し、土地利用多様化と炭素隔離の関係を定量化する。

🏢実務担当者:農林業・食品企業がサプライチェーン上流の土壌炭素クレジットや再生農業導入を検討する際の基礎的エビデンスとなる。

🏛政策担当者:農地炭素貯留を気候政策やクレジット制度に組み込む際の、統合農業システムの実証的裏付けとして参考になる。

📄 Abstract(原文)

Integrated farming systems (IFS) may improve soil carbon storage by diversifying biomass inputs and reducing reliance on continuous cereal cultivation. This field study assessed depth-wise soil organic carbon (SOC) stock and surface-layer carbon sequestration in a decade-old IFS model at the Farming System Research Centre, SKUAST-Jammu, Chatha, relative to an adjoining existing farmer’s farming system (EFFS) under continuous rice–wheat cultivation. Composite soil samples were collected from four depths (0–15, 15–30, 30–45 and 45–60 cm) and analysed for organic carbon using the Walkley–Black method, while bulk density was determined by the core method. Carbon stock and sequestration were calculated from SOC concentration, bulk density and soil depth, and the data were analysed using a randomised block design. Soil carbon stock decreased with increasing depth across all land uses. The highest SOC stock up to 60 cm was recorded under boundary plantation with turmeric intercropping (46.64 Mg C ha⁻¹), followed by fodder, horticulture and crop blocks, while the lowest occurred under EFFS (26.34 Mg C ha⁻¹). Overall, the IFS model accumulated 38.91 Mg C ha⁻¹ up to 60 cm, representing about 48% greater carbon storage than in EFFS. Surface-layer carbon sequestration ranged from 2.94 Mg C ha⁻¹ under perennial fodder to 7.90 Mg C ha⁻¹ under boundary plantation, whereas EFFS showed a negative value (–0.65 Mg C ha⁻¹). Over ten years, the IFS model achieved an overall carbon sequestration of 4.47 Mg C ha⁻¹, demonstrating its greater potential for soil carbon accumulation compared with continuous rice–wheat cultivation.

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