Straw Input Altered the Composition of Aggregate‐Associated Organic Carbon in Soils With Different Initial Carbon Status
わら投入が異なる初期炭素状態の土壌における団粒結合有機炭素の組成を変えた (AI 翻訳)
Xu Liu, Tingting An, Roland Bol, Chang Peng, Shuangyi Li, Lei Du, Jingkuan Wang
🤖 gxceed AI 要約
日本語
この研究は、初期炭素状態の異なる土壌（低炭素および高炭素のMollisols）にトウモロコシのわらを添加し、土壌団粒内の有機炭素の組成変化を調べた。わら添加は低炭素土壌のマクロ団粒内のリグニン濃度を増加させたが、高炭素土壌では減少させた。微生物ネクロマスと易分解性有機炭素が団粒内の炭素蓄積に異なる役割を果たすことを示した。
English
This study examined the effect of maize straw addition on the composition of organic carbon within soil aggregates in Mollisols with low and high initial carbon status. Straw addition increased lignin phenol concentration in macroaggregates only in low-carbon soil, while it decreased in high-carbon soil. Microbial necromass and labile organic carbon played differential roles in mediating aggregate-associated organic carbon regardless of initial carbon status.
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
日本の農地土壌における炭素貯留は、GX戦略の一環として注目されている。本研究は、初期炭素状態に応じたわら施用の効果を明らかにし、土壌炭素管理の最適化に貢献する。
In the global GX context
Soil carbon sequestration is a key component of global climate mitigation strategies. This study provides mechanistic insights into how residue management affects soil organic carbon stabilization in aggregates, relevant for carbon accounting and agricultural climate policies.
👥 読者別の含意
🔬研究者:This study provides mechanistic understanding of how straw addition affects soil organic carbon composition in aggregates depending on initial carbon status, useful for modeling soil carbon dynamics.
🏛政策担当者:Insights for designing carbon sequestration policies in agricultural soils, emphasizing the need to consider baseline soil carbon levels.
📄 Abstract（原文）
ABSTRACT Initial soil carbon (C) status affects microbial utilization for plant residue and changes the retention of plant‐ and microbial‐derived C in soils. Soil aggregates stabilize organic C components through physical protection and mineral adsorption. Nevertheless, the information about how crop straw incorporation affects aggregates‐associated organic C sources and composition is limited, especially in soils with different initial C status. Here, the initial low (LC) and high C (HC) Mollisols were incubated with or without the addition of maize straw (followed as 12 t ha −1 ) for 360 days in Northeast China. The SOC content in the topsoil (0–20 cm) of LC and HC was 15.5 and 25.2 g kg −1 , respectively. The effect of inherent soil C on the accumulation of lignin phenol and microbial necromass and the chemical composition of organic C within soil aggregates (macroaggregates, > 0.25 mm; and microaggregates, < 0.25 mm) was investigated after adding maize straw. Maize straw addition increased the concentration of total lignin phenol within macroaggregates by 39% in LC soil but decreased that concentration within both macroaggregates and microaggregates by 18% and 41% in HC soil, respectively. These results indicated that straw addition had a positive significance in enhancing the contribution of plant lignin components to macroaggregates‐associated organic C in initial low C soil. Moreover, maize straw addition increased the contribution of amino sugar to organic C within macroaggregates and increased the relative proportion of O‐alkyl C in organic C within microaggregates in both LC and HC soils, indicating that independent of initial soil C status, microbial necromass and labile organic C components played differential roles in mediating aggregate‐associated organic C in soils following maize straw addition. Overall, changes in aggregate‐associated organic C in both initial low and high C soils following straw amendment were depicted by organic C molecular composition alteration.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1111/ejss.70373first seen 2026-07-02 05:42:42
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。