放牧は特定の炭素循環経路を抑制する一方、土壌-植物-家畜炭素ポンプの調節を介してシステムの炭素バランスを向上させる
Grazing Enhances System Carbon Balance via the Soil‐Plant‐Livestock Carbon Pump Regulation Despite Suppressing Specific Carbon Cycling Pathways (原題)
Yi Zhou, Xinzhou Zhao, Lan Li, Fujiang Hou, Zhibiao Nan
🤖 gxceed AI 要約
日本語
24年間の放牧実験に基づき、放牧が草地生態系の炭素循環に与える影響を「土壌-植物-家畜炭素ポンプ」の枠組みで解明。放牧強度の増加は地上部バイオマスとリターの炭素を減少させるが、システム全体の炭素バランスには正の効果をもたらす。植物と土壌の炭素循環経路が主要な直接要因であり、家畜は間接的に10.6%～44.9%の変動を説明する。放牧はシステム炭素ポンプ効率を制約し、炭素バランスを負に制御する（変動の32%～61%）。生態学的・経済的二重成長戦略への示唆を提供。
English
Based on a 24-year grazing experiment, this study proposes a 'Soil-Plant-Livestock Carbon Pump' framework to explain grazing effects on carbon cycling. Although grazing intensity reduces aboveground biomass and litter carbon, it positively affects overall system carbon balance. Plant and soil pathways are key direct factors, while livestock indirectly explains 10.6%-44.9% of variance. Grazing constrains system carbon pump efficiency, negatively regulating carbon balance (32%-61% of variance). Findings inform dual ecological and economic growth strategies.
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
日本の草地管理や農業政策において、炭素貯留を考慮した放牧管理の重要性を示す。ただし、日本のGX政策（SSBJ等）への直接的な関連は薄く、むしろ農業分野の気候変動適応・緩和策として参考になる。
In the global GX context
This study contributes to global understanding of grassland carbon dynamics under grazing, relevant for climate mitigation strategies in agriculture. It offers empirical evidence for designing sustainable grazing policies that balance ecological and economic outcomes, aligning with global efforts on land-use carbon accounting.
👥 読者別の含意
🔬研究者:Provides a novel conceptual framework and long-term empirical data on grazing effects on carbon balance, useful for ecosystem carbon modeling.
🏢実務担当者:Offers insights for sustainable grazing management that can enhance carbon sequestration, relevant for agricultural sustainability reporting.
🏛政策担当者:Informs agricultural and land-use policies aimed at carbon neutrality, highlighting the trade-offs between grazing intensity and carbon storage.
📄 Abstract（原文）
Abstract Grazing is among the most direct and effective strategies for anthropogenic regulation of carbon cycling in global grasslands. Through a 24‐year grazing experiment, we propose a conceptual framework of the “Soil‐Plant‐Livestock Carbon Pump” to elucidate the mechanisms underlying grazing effects on carbon cycling within plant, soil, livestock, and soil‐plant‐livestock system. Our results indicate that although each unit increase in grazing intensity reduced carbon in above‐ground standing biomass and litter by 4.91 and 0.91 g C m −2 yr −1 , respectively, grazing ultimately had a significant positive effect on system carbon balance. Specifically, grazing reconfigured the pathways of plant carbon allocation, soil carbon inputs, and livestock carbon consumption. Further analysis revealed that plant and soil carbon cycling pathways were the key direct factors regulating system carbon balance, while livestock indirectly explained 10.6%–44.9% of the variance. Furthermore, from a holistic system perspective, grazing constrained the system carbon pump efficiency, which in turn negatively regulated the carbon balance, accounting for 32%–61% of the variance. These findings indicate that grazing can regulate system carbon balance through the soil‐plant‐livestock carbon pump. Understanding the operating mechanisms of the system carbon cycle is crucial for developing a dual ecological and economic growth strategy.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1029/2026ef008382first seen 2026-08-30 04:43:32
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