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Coarse Root Enhancement Increases Soil Organic Carbon While Decreasing Its Stability in a Wetland

文献类型：期刊论文

作者Liang, Zhenghao1,2; Song, Jia1,3,4; Sun, Ruifeng1,3,4; Zhao, Mingliang1,3,4; Wei, Siyu1,3,4; Song, Weimin1,3,4; Wang, Xiaojie1,3,4; Chu, Xiaojing1,3,4; Zhang, Xiaoshuai1,3,4; Jiang, Changsheng2
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期2026-01-20
卷号60期号:2页码:1831-1843
关键词precipitation POC MAOC coarse root microbial biomass leaching constituents
ISSN号0013-936X
DOI10.1021/acs.est.5c09616
通讯作者Jiang, Changsheng(jiangcs@126.com) ; Han, Guangxuan(gxhan@yic.ac.cn)
英文摘要Wetland soil organic carbon (SOC) sequestration effectively reduces atmospheric CO2. Fractionating SOC into labile particulate organic carbon (POC) and stable mineral-associated organic carbon (MAOC) is crucial for predicting its stability. Precipitation-induced variations in coarse (>2 mm) and fine (<2 mm) roots are key regulators of SOC stability, but their specific contributions remain unclear. Here, we conducted a 10-year field simulation of precipitation changes (-60%, -40%, 0%, + 40%, + 60%) in a wetland. We found that increased precipitation enhanced Gramineae abundance, thereby increasing coarse-root biomass, while fine roots changed little. Compared to CK, coarse roots directly boosted topsoil POC (+37.4%) and enhanced MAOC (+31.5%) via microbial stimulation. Furthermore, increased coarse-root biomass was associated with greater vertical transport of DOC and nitrate (NO3-), potentially contributing to higher subsoil POC (+218.7%) and MAOC (+17.2%). With increasing precipitation, the MAOC/POC ratio decreased from 1.65 to 1.11 in the topsoil and from 8.73 to 2.66 in the subsoil, suggesting that coarse roots favored POC over MAOC, increasing SOC but reducing its stability. These results provide mechanistic insights into wetland carbon-climate feedbacks under altered precipitation regimes.
WOS关键词MATTER ; STABILIZATION ; MOUNTAIN ; LITTER ; FINE
WOS研究方向Engineering ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001655354700001
资助机构Southwest University ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NSFC)
源URL[http://ir.yic.ac.cn/handle/133337/41992]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者Jiang, Changsheng; Han, Guangxuan
作者单位1.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China
2.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China
3.Chinese Acad Sci, Yellow River Delta Field Observat, Dongying 257500, Shandong, Peoples R China
4.Chinese Acad Sci, Res Stn Coastal Wetland Ecosyst, Dongying 257500, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Liang, Zhenghao,Song, Jia,Sun, Ruifeng,et al. Coarse Root Enhancement Increases Soil Organic Carbon While Decreasing Its Stability in a Wetland[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2026,60(2):1831-1843.
APA Liang, Zhenghao.,Song, Jia.,Sun, Ruifeng.,Zhao, Mingliang.,Wei, Siyu.,...&Han, Guangxuan.(2026).Coarse Root Enhancement Increases Soil Organic Carbon While Decreasing Its Stability in a Wetland.ENVIRONMENTAL SCIENCE & TECHNOLOGY,60(2),1831-1843.
MLA Liang, Zhenghao,et al."Coarse Root Enhancement Increases Soil Organic Carbon While Decreasing Its Stability in a Wetland".ENVIRONMENTAL SCIENCE & TECHNOLOGY 60.2(2026):1831-1843.

入库方式： OAI收割

来源：烟台海岸带研究所

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