Afforestation of Terrace Promotes Soil Organic Carbon Accumulation but Reduces Soil Organic Carbon Stability in Mountainous Regions of Southern China
段丘の植林は土壌有機炭素の蓄積を促進するが、中国南部の山岳地域では土壌有機炭素の安定性を低下させる (AI 翻訳)
Le-Lin Yu, Xiang‐Rong Du, Yu Xiong, Y ZHANG, Le-Cheng Ai, Rong Mao
🤖 gxceed AI 要約
日本語
中国南部の亜熱帯山岳地域における段丘の植林が土壌有機炭素（OC）の蓄積と安定性に及ぼす影響を調査。杉とフウの植林により土壌OC量は増加したが、化学的安定性は低下した。樹種による違いは認められたが、全体的に安定性を犠牲にして炭素蓄積が促進されることを示唆。
English
This study examines how afforestation of terraces in subtropical mountainous southern China affects soil organic carbon (OC) accumulation and stability. Both Cunninghamia lanceolata and Liquidambar formosana plantations increased soil OC stocks (52.4% and 26.8% respectively) but reduced OC chemical stability, particularly in particulate and mineral-associated fractions. The findings indicate that afforestation promotes carbon storage at the cost of stability, regardless of tree species.
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
日本の再造林や森林管理施策において、土壌炭素隔離の効果と安定性のトレードオフを考慮する上で参考となる。特に、日本の中山間地域での植林事業に示唆を与える可能性がある。
In the global GX context
This paper adds to the global understanding of soil carbon dynamics under afforestation, highlighting a trade-off between carbon accumulation and stability. Relevant for nature-based climate solutions and carbon offset projects, though the specific subtropical context may limit direct transferability.
👥 読者別の含意
🔬研究者:Provides empirical evidence on soil organic carbon fraction responses to afforestation in terraced landscapes, useful for carbon cycle modeling.
🏢実務担当者:Informs land managers about potential stability reductions when using afforestation for carbon sequestration.
🏛政策担当者:Suggests that carbon accounting for afforestation projects should consider both stock changes and stability to avoid overestimating climate benefits.
📄 Abstract（原文）
ABSTRACT Afforestation of farmland is considered a potential strategy to mitigate elevated atmospheric CO 2 concentration by sequestering organic carbon (OC) in plant biomass and soil. However, whether the trends of soil OC stock and stability vary with tree species after afforestation of terraces remains unclear in subtropical mountainous regions. To clarify the effects of tree species on soil OC dynamics, we measured the concentrations, chemical compositions, and δ 13 C values of soil OC, particulate organic C (POC), and mineral–associated organic C (MAOC), along with other soil physicochemical properties at depths of 0–10 cm and 10–30 cm in abandoned terraces, Cunninghamia lanceolata plantations, and Liquidambar formosana plantations in the western Wuyi Mountains of southern China. Results showed that afforestation of terraces significantly increased soil OC stock, with a greater increase under C. lanceolata plantations (52.4%) than under L. formosana plantations (26.8%). At 0–10 cm soil depth, both plantations had significantly greater soil POC and MAOC concentrations than abandoned terraces. Afforestation of terraces only significantly increased the δ 13 C values of OC at 10–30 cm soil depth, indicating accelerated OC turnover in subsurface soils. In both POC and MAOC fractions, afforestation of terraces had a lower proportion of aromatic‐C fractions, and thus exhibited a lower OC chemical stability index. Soil OC fractions correlated significantly with soil C:N ratio and minerals at 0–30 cm depths. These findings suggest that, regardless of tree species, afforestation of terrace promotes soil OC accumulation at the cost of reduced OC stability in the mountainous regions of southern China.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/ldr.70681first seen 2026-06-18 05:37:52
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