減耕起と25%有機代替の組み合わせが、オアシス間作体系における物理・化学・生物的カスケードを通じて飼料収量を高め、炭素フットプリントを削減する
Reduced tillage with 25% organic substitution enhances forage yield and reduces carbon footprint via a physical-chemical-biological cascade in an oasis intercropping system (原題)
FaLong Hu, Hailong Li, Minglong Zhang, Qiang REN, Zhilong Fan, Wen Yin, Wei He, Yali Sun, Hong Fan, Feng Wang, Qiang Chai
🤖 gxceed AI 要約
日本語
中国オアシス地域のサイレージトウモロコシ・ラッカセイ間作体系で3年間の圃場試験を実施。減耕起（RT）と化学肥料75%＋有機肥料25%（F2）の組み合わせが、慣行区比で飼料収量を8.7%増やしつつ、N2O排出23.6%減、収量当たり炭素フットプリント44.2%減を達成した。土壌物理性改善→養分プール増大→微生物活性向上というカスケードが収量と環境便益の両立を媒介していた。
English
A three-year field trial in a silage maize–laba bean intercropping system in a Chinese oasis tested reduced tillage (RT) with organic fertilizer substitution. RT with 25% organic substitution (RTF2) raised forage yield 8.7% while cutting N2O emissions 23.6% and yield-scaled carbon footprint 44.2% versus conventional practice. A physical–chemical–biological cascade—improved soil physics, larger nutrient pools, higher microbial activity—fully mediated the yield gains.
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
日本では農業分野のGXはScope3（カテゴリ1：購入した製品・サービス）や食品・飼料サプライチェーンの排出削減文脈で重要性が増している。本論文は土壌管理による炭素フットプリント削減の定量的エビデンスを提供し、農業由来排出の算定・削減手法として日本の食品企業や農協のScope3管理に示唆を与える。
In the global GX context
Agriculture accounts for roughly a fifth of global GHG emissions, yet soil-management abatement is often underrepresented in corporate climate disclosure. This study offers field-level, yield-scaled carbon-footprint evidence that can inform Scope 3 Category 1 accounting for food and feed supply chains under CSRD, ISSB, and SBTi FLAG guidance.
👥 読者別の含意
🔬研究者:減耕起と有機代替の相乗効果を物理・化学・生物的カスケードで説明する構造方程式モデルは、土壌炭素・収量トレードオフ研究の方法論的参照点となる。
🏢実務担当者:飼料・食品サプライチェーン企業がScope3カテゴリ1排出削減と調達安定性を両立させる際の、圃場レベル介入オプションとして参考になる。
🏛政策担当者:水制約地域における農業GX政策（有機資材補助、減耕起普及）の費用対効果設計に、収量と炭素削減の同時達成可能性を示すエビデンスを提供する。
📄 Abstract（原文）
Achieving high forage yield while minimizing environmental footprint is a central challenge for sustainable crop production in water-limited oasis regions. We hypothesized that reduced tillage combined with organic fertilizer substitution could enhance yield and lower carbon footprint through a physical-chemical-biological cascade. A three-year field experiment was conducted in a silage maize-laba bean intercropping system using a split-plot design with two tillage methods (conventional tillage, CT; reduced tillage, RT) and four fertilization regimes (100% chemical fertilizer, F1; 75% chemical + 25% organic fertilizer, F2; 50% chemical + 50% organic fertilizer, F3; 25% chemical + 75% organic fertilizer, F4). Results showed that the RTF2 treatment achieved the highest forage yield, increasing by 8.7% compared to RTF1. Beyond yield gains, RTF2 reduced N 2 O emissions by 23.6%, greenhouse gas emission intensity by 11.4%, and yield-scaled carbon footprint by 44.2% relative to RTF1. This win-win outcome was underpinned by a physical-chemical-biological cascade: RT first improved soil physical conditions (soil temperature +4.0%, water‑filled pore space +2.6%), which amplified the benefits of F2, leading to the highest soil nutrient pools (SOC, TN, available nutrients) and microbial activity (MBC, MBN, enzyme activities); this biological activation drove soil multifunctionality to its peak. Structural equation modeling confirmed that management effects on yield were entirely mediated through this cascade, with microbial activity as the proximate determinant of productivity ( β = 0.968), We conclude that reduced tillage synergized with 25% organic substitution optimizes the trade-off between yield enhancement and environmental sustainability in oasis cropping systems, providing a practical and transferable strategy for sustainable intensification of forage production in water‑limited agricultural regions worldwide.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.eja.2026.128345first seen 2026-09-30 05:00:34
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