Environmental implications of agricultural abandonment on Fe cycling: Insight from iron forms and stable isotope composition in karst soil, southwest China
文献类型：期刊论文
| 作者 | Zhang, Qian2; Han, Guilin1; Liu, Man1; Zhang, Shitong1; Wang, Lingqing2; Zhu, Guangyou3 |
| 刊名 | ENVIRONMENTAL RESEARCH
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 215页码:9 |
| 关键词 | Fe forms Fe isotopes Agricultural abandonment Karst soils Land-use change |
| ISSN号 | 0013-9351 |
| DOI | 10.1016/j.envres.2022.114377 |
| 通讯作者 | Han, Guilin(hanguilin@cugb.edu.cn) |
| 英文摘要 | Land-use change influences the fate of nutrient elements, including iron (Fe), and then threaten soil security. In this study, Fe forms and stable isotope composition (delta Fe-56) in soils were investigated to identify the variations in the processes of Fe cycling during agricultural abandonment in a karst region of Southwest China. Soil delta Fe-56 compositions varied from -0.05 parts per thousand-0.02 parts per thousand in croplands, 0.05 parts per thousand-0.12 parts per thousand in abandoned croplands, to 0.30 parts per thousand-0.80 parts per thousand in the native vegetation lands. In the croplands, Fe oxidation-precipitation process is considered as the main contributor to Fe migration and isotope fractionation, leading to a relatively enrichment of heavier Fe isotope in deeper soil layer. In the abandoned croplands and native vegetation lands, Fe isotope in the organicrich layer (0-10 cm) was significantly lighter than that in subsurface layer (20-30 cm), mainly due to the recovery of soil organic carbon (SOC) and macro-aggregate after cropland abandonment. Moreover, the eluviation process mainly caused a decrease in soil Fe contents and enrichment of heavy Fe isotope in deeper soils (below 40 cm). The positive correlation between oxidized Fe and SOC contents suggested the accumulation of mobile Fe in soils after agricultural abandonment, which is beneficial for Fe uptake and assimilation by plants. This study suggests that agricultural abandonment significantly reduce soil Fe leaching loss and improve plant Fe supply by SOC accumulation in surface soil, which gives an environmental implication for the management of soil nutrients. |
| WOS关键词 | ORGANIC-MATTER ; PADDY SOILS ; FRACTIONATION ; PEDOGENESIS ; DISSOLUTION ; REDUCTION ; EVOLUTION ; OXIDATION ; SEDIMENTS ; TERRAIN |
| 资助项目 | National Natural Science Foundation of China[42203011] ; National Natural Science Foundation of China[41661144029] ; National Natural Science Foundation of China[41325010] |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| 语种 | 英语 |
| WOS记录号 | WOS:000892427600006 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/187888]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Han, Guilin |
| 作者单位 | 1.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Qian,Han, Guilin,Liu, Man,et al. Environmental implications of agricultural abandonment on Fe cycling: Insight from iron forms and stable isotope composition in karst soil, southwest China[J]. ENVIRONMENTAL RESEARCH,2022,215:9. |
| APA | Zhang, Qian,Han, Guilin,Liu, Man,Zhang, Shitong,Wang, Lingqing,&Zhu, Guangyou.(2022).Environmental implications of agricultural abandonment on Fe cycling: Insight from iron forms and stable isotope composition in karst soil, southwest China.ENVIRONMENTAL RESEARCH,215,9. |
| MLA | Zhang, Qian,et al."Environmental implications of agricultural abandonment on Fe cycling: Insight from iron forms and stable isotope composition in karst soil, southwest China".ENVIRONMENTAL RESEARCH 215(2022):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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