Maize-soybean rotation with straw return improves carbon stabilization efficiency by distinctively allocating soil carbon pool fractions in northeast China
中国東北部におけるトウモロコシ-大豆輪作とわら還元による炭素安定化効率の向上：土壌炭素プール画分の特異的配分 (AI 翻訳)
Rongqi Ye, Jiaxin Shang, Yongpeng Cao, Li Zong, Liu Z, Yadong Yang, Wen Zhang, Xiangwei Gong, Ying Jiang
🤖 gxceed AI 要約
日本語
中国東北部の圃場実験で、トウモロコシ-大豆輪作とわら還元の組み合わせが土壌有機炭素の安定化効率を高めることを示した。鉱物結合有機炭素や微生物バイオマス炭素の増加が安定化に寄与し、収量も向上した。炭素隔離と食料生産の両立可能性を示唆する。
English
This field experiment in Northeast China shows that combining maize-soybean rotation with straw return enhances soil organic carbon stabilization efficiency. It increases mineral-associated organic carbon and microbial biomass, leading to higher carbon storage with lower inputs, while improving crop yield. Findings suggest synergy between carbon sequestration and food production.
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
日本のカーボンファーミング施策において、輪作と有機物施用の組み合わせによる炭素安定化効率向上の実証データとして参考になる。水田・畑地での温暖化対策技術に応用可能性がある。
In the global GX context
Globally, soil carbon sequestration is a key nature-based climate solution. This paper provides mechanistic evidence on how crop rotation and straw return improve carbon stabilization efficiency, relevant for IPCC inventories and agricultural mitigation strategies.
👥 読者別の含意
🔬研究者:Provides mechanistic evidence linking crop rotation and straw return to soil carbon stabilization efficiency.
🏢実務担当者:Farmers and agricultural advisors can consider integrating these practices for carbon sequestration and yield improvement.
🏛政策担当者:Supports inclusion of diversified crop rotations in agricultural carbon programs and national greenhouse gas inventories.
📄 Abstract（原文）
Straw return (ST) and maize-soybean rotation (MS) are recognized agronomic strategies for enhancing soil organic carbon (SOC). However, their combined effects on SOC stabilization and underlying mechanisms remain unclear, particularly regarding carbon use efficiency and stabilization pathways. A split-plot field experiment was conducted in Northeast China to evaluate the effects of straw return and maize–soybean rotation on SOC fractions, microbial necromass accumulation, extracellular enzyme activities, soil respiration, and crop yield. Our results showed that ST with MS promoted SOC stability and higher grain yield. Notably, ST with MS achieved comparable SOC levels with lower C input and soil respiration, indicating higher C stabilization efficiency. This was associated with increased contribution of MAOC to SOC (1.68-5.11%), but decreased for POC, reflecting a shift toward more stable C pools. Compared with continuous cropping, MS increased MBC (8.21-8.24%), DOC (10.76-14.74%), and MNC (13.42-41.43%), while enhancing soil enzymes activity and alleviating microbial N limitation. Random forest and partial least squares path modeling identified MAOC as the key driver of SOC, with MBC indirectly promoting MAOC formation via MNC accumulation. These findings demonstrate that the integration of straw return and crop rotation could be considered as effective practices to improve SOC stability and crop yield, provide a theoretical framework for synergistically optimizing soil C sequestration and food production strategies as well.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.jafr.2026.103036first seen 2026-06-18 05:44:06
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