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緑肥カバーが中国黄土高原の山地リンゴ園における土壌炭素隔離を高め、炭素・窒素フットプリントを緩和する

Green Manure Cover Enhances Soil Carbon Sequestration and Mitigates Carbon and Nitrogen Footprints in Mountainous Apple Orchards of China’s Loess Plateau (原題)

赵成政, Lichao Fan, Yixin Zheng, Hailun Du, Benhua Sun, Hao Feng

Forests📚 査読済 / ジャーナル2026-10-22#炭素会計Origin: CN対象セクター: agriculture
DOI: 10.3390/f17111260
原典: https://doi.org/10.3390/f17111260

🤖 gxceed AI 要約

日本語

中国黄土高原の山地リンゴ園で3年間の圃場試験を行い、5種の緑肥作付体系をライフサイクル評価で比較した。ヘアリーベッチと菜種の間作が土壌品質指数と総合評価指数を最も高め、炭素フットプリントを最大30.37%、窒素フットプリントを最大22.70%、環境損害コストを最大25.86%削減した。炭素フットプリントは土壌有機炭素隔離速度とN2Oが主に規定していた。

English

A three-year field experiment in Loess Plateau apple orchards compared five green manure systems using life cycle assessment. Hairy vetch–rapeseed intercropping maximized soil quality and cut carbon footprint by up to 30.4%, nitrogen footprint by 22.7%, and environmental damage costs by 25.9% versus clear tillage. Soil organic carbon sequestration and N2O dominated the carbon footprint.

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

Scope 3 算定における農業サプライチェーン（一次産業由来排出）の評価手法として、フットプリント算定の実証データを提供する。食品・飲料企業の上流排出把握に示唆。

In the global GX context

Offers empirical LCA evidence on agricultural carbon and nitrogen footprints relevant to Scope 3 upstream accounting and land-sector sequestration in corporate value-chain disclosure.

👥 読者別の含意

🔬研究者:緑肥体系のLCA評価と土壌炭素隔離の寄与分解に関する実証的知見を提供する。

🏢実務担当者:農産物調達を持つ企業が上流Scope 3排出と土壌炭素隔離を評価する際の参考データとなる。

🏛政策担当者:農業由来の炭素・窒素削減策の費用対効果評価に資する。

📄 Abstract（原文）

Green manure cultivation is recognized as a viable measure for mitigating agro-environmental degradation. However, it remains unclear whether diversified cropping can further enhance the environmental benefits of green manure systems, which impedes the full exploitation of their ecological benefits for sustainable agriculture. Here, we conducted a three-year field experiment in mountainous apple orchards of China’s Loess Plateau, and employed a life cycle assessment to evaluate the effects of five green manure cropping systems (clear tillage (CK); hairy vetch monoculture; oil rapeseed monoculture; hairy vetch intercropped with rapeseed; hairy vetch mixed with rapeseed). Green manure planting significantly improved the soil quality index and comprehensive evaluation index, with the highest soil quality and comprehensive evaluation indices observed in the hairy vetch intercropped with rapeseed. The hairy vetch intercropped with rapeseed can enhance the comprehensive benefits of green manure while reducing carbon and nitrogen footprints. Compared with the control, all green manure treatments except for the hairy vetch monoculture significantly reduced the carbon footprint by 9.39%–30.37%, the nitrogen footprint by 14.23%–22.70%, and environmental damage costs by 16.36%–25.86%. The carbon footprint was primarily regulated by N2O emissions and soil organic carbon sequestration rate, with contribution rates of 31.36% and 62.46%, respectively. The nitrogen footprint was mainly associated with NO3–N and N2O emissions, with contribution rates of 46.88% and 36.79%, respectively. Therefore, the diversified cropping (i.e., the hairy vetch–rapeseed intercropping) system exceed the monoculture for sustainable apple orchard production.

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