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Manganese reduction regulates soil organic carbon loss from an acidified Cambisol

文献类型：期刊论文

作者Zhou, Shiwei1; Kong, Jiaming1; Song, Zhizhong1; Zhang, Xiaolong2; Bi, Xiaoli3
刊名EUROPEAN JOURNAL OF SOIL SCIENCE
出版日期2022-11-01
卷号73期号:6页码:13
关键词acidification free Mn metal-organic complex (MOC) reductive dissolution sequentially extracted Mn fractions
ISSN号1351-0754
DOI10.1111/ejss.13333
通讯作者Bi, Xiaoli(xlbi@yic.ac.cn)
英文摘要Soil acidification has occurred and accelerated in Jiaodong Peninsula, China, causing serious problems, such as manganese (Mn) toxicity and soil organic carbon (SOC) losses. However, the relationships between SOC and soil Mn are still unclear. This study aimed to explore the changes of Mn fractions and SOC under soaking conditions and the acidification-induced positive coupled relationship between them. A sequential extraction for Mn species after acid soaking of a Cambisol was conducted, and the soil (pre-and post-soaking) was characterised by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed that acidification of a Cambisol (from pH 6.48 to pH 2.79) induced SOC losses (15.8% of initial SOC). Meanwhile, lower mobile or immobile Mn (especially oxide-Mn) significantly decreased, accompanied by an increase in readily soluble Mn. It was further shown that the amount of decrease in free Mn reached 268.7 mg kg -1, accounting for 93.8% of the total loss of soil Mn, indicating that the reductive dissolution of amorphous Mn (III/IV) oxides is the dominant reaction in acidified Cambisols. This result was also supported by XRD and SEM. Correlation analysis showed that under soil acidification, the reductive dissolution of amorphous Mn (III/IV) oxides drove losses of both SOC and soil Mn. Therefore, a possible reaction mechanism was proposed: at neutral and alkaline pH, immobile complexes of Mn (III/IV) and particulate organic carbon (POC) formed; and, at acidic pH, readily mobile complexes of Mn (II) and dissolved organic carbon (DOC) formed. Our research suggested that Mn-organic carbon complexes regulated the transport, transformation, and leaching of soil Mn and SOC, and future research should focus on the soil acidification-driven Mn reduction-carbon oxidation processes.
WOS关键词OXIDATION ; PH ; ACIDIFICATION ; MATTER ; SEDIMENTS ; REGION ; FRACTIONATION ; COMPLEXATION ; RHIZOSPHERE ; CHEMISTRY
WOS研究方向Agriculture
语种英语
WOS记录号WOS:000901461500001
资助机构National Basic Investigation Program of China ; National Natural Science Foundation of China ; High-level Talent Project of Ludong University
源URL[http://ir.yic.ac.cn/handle/133337/37004]  
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
烟台海岸带研究所_海岸带信息集成与综合管理实验室
通讯作者Bi, Xiaoli
作者单位1.Ludong Univ, Sch Agr, Yantai, Peoples R China
2.Yantai Univ, Sch Environm & Mat Engn, Yantai, Peoples R China
3.Chinese Acad Sci, Yantai Inst Costal Zone Res, Yantai 264003, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Shiwei,Kong, Jiaming,Song, Zhizhong,et al. Manganese reduction regulates soil organic carbon loss from an acidified Cambisol[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2022,73(6):13.
APA Zhou, Shiwei,Kong, Jiaming,Song, Zhizhong,Zhang, Xiaolong,&Bi, Xiaoli.(2022).Manganese reduction regulates soil organic carbon loss from an acidified Cambisol.EUROPEAN JOURNAL OF SOIL SCIENCE,73(6),13.
MLA Zhou, Shiwei,et al."Manganese reduction regulates soil organic carbon loss from an acidified Cambisol".EUROPEAN JOURNAL OF SOIL SCIENCE 73.6(2022):13.

入库方式： OAI收割

来源：烟台海岸带研究所

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