Tracing Fe cycle isotopically in soils based on different land uses: Insight from a typical karst catchment, Southwest China
文献类型：期刊论文
| 作者 | Han, Ruiyin2,3,4; Zhang, Qian1; Xu, Zhifang2,3,4 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-01-15 |
| 卷号 | 856页码:9 |
| 关键词 | Iron cycle Iron isotopes Isotopic tracing Land -use types Limestone soils Karst area |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2022.158929 |
| 通讯作者 | Zhang, Qian(zhangqian@igsnrr.ac.cn) |
| 英文摘要 | Iron (Fe) isotopes can effectively unveil the Fe cycle mechanisms under redox and biological conditions during the weathering and pedogenic processes. Fe contents and Fe isotope compositions (defined as delta 56Fe) in the soil profiles under secondary forest land, abandoned cropland and shrubland were investigated in a typical karst area in Southwest China. The results showed that the Fe content ranged from 23.92 to 38.56 g/kg, 21.92 to 33.02 g/kg and 12.98 to 27.93 g/kg, and the delta 56Fe levels varied from -0.48 %o to 0.21 %o, -0.24 %o to 0.11 %o and - 0.11 %o to 0.16 %o from the secondary forest land, abandoned cropland and shrubland, respectively. The correlation analysis results showed that Fe transportation and isotopic fractionation were regulated by the redox processes through soil pH and soil organic matter (SOM) in the abandoned cropland and shrubland. Heavier Fe isotope may be accumulated in the deeper soil of secondary forest land due to Fe-oxide precipitation. The Fe isotope fractionations were greatly altered by soil organic carbon (SOC) in surface soils due to negative surface charges. Soil pH also plays a key role in enriching lighter Fe in a medium-acidic environment (shrubland) by ligand-controlled dissolution and reductive dissolution. Long-term cultivation in abandoned cropland and grazing in shrubland reshaped the Fe cycle in soil profiles by changing soil pH and SOC contents. However, the similar values of delta 56Fe in different land use soils indicated that the agricultural activities have no significant impact on the Fe transformation in karst soil ecosystems. The land utilization is reasonable in the Yinjiang County. This study provided effective data and insightful analysis to understand the Fe cycle processes in the karst soils under varied land uses. |
| WOS关键词 | IRON ISOTOPE FRACTIONATION ; ORGANIC-MATTER ; PADDY SOIL ; PEDOGENESIS ; COPPER ; REDOX ; FINGERPRINTS ; EXCHANGE |
| 资助项目 | National Key Research and Development Program of China[2020YFA0607700] ; National Natural Science Foundation of China[41730857] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000870101000014 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/185991]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Qian |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.CAS Ctr Excellence Life & Paleoenvironment, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Ruiyin,Zhang, Qian,Xu, Zhifang. Tracing Fe cycle isotopically in soils based on different land uses: Insight from a typical karst catchment, Southwest China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,856:9. |
| APA | Han, Ruiyin,Zhang, Qian,&Xu, Zhifang.(2023).Tracing Fe cycle isotopically in soils based on different land uses: Insight from a typical karst catchment, Southwest China.SCIENCE OF THE TOTAL ENVIRONMENT,856,9. |
| MLA | Han, Ruiyin,et al."Tracing Fe cycle isotopically in soils based on different land uses: Insight from a typical karst catchment, Southwest China".SCIENCE OF THE TOTAL ENVIRONMENT 856(2023):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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