Manganese reduction regulates soil organic carbon loss from an acidified Cambisol

doi:10.1111/ejss.13333

	Manganese reduction regulates soil organic carbon loss from an acidified Cambisol
	Zhou, Shiwei 1; Kong, Jiaming 1; Song, Zhizhong 1; Zhang, Xiaolong 2; Bi, Xiaoli3
发表期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
	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
DOI	10.1111/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.
资助机构	National Basic Investigation Program of China ; National Natural Science Foundation of China ; High-level Talent Project of Ludong University
收录类别	SCI
语种	英语
关键词[WOS]	OXIDATION ; PH ; ACIDIFICATION ; MATTER ; SEDIMENTS ; REGION ; FRACTIONATION ; COMPLEXATION ; RHIZOSPHERE ; CHEMISTRY
研究领域[WOS]	Agriculture
WOS记录号	WOS:000901461500001
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/32436
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带信息集成与战略规划研究中心
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.