Soil copper sources and biogeochemical processes under different land uses: insights from stable copper isotopes in the Cambisols of Southwest China
文献类型：期刊论文
| 作者 | Liu, Man2; Han, Guilin1; Zhang, Qian3 |
| 刊名 | PEERJ
 |
| 出版日期 | 2025-09-02 |
| 卷号 | 13页码:e19982 |
| 关键词 | Stable copper isotopes Land uses Cambisols Karst region Southwest China |
| ISSN号 | 2167-8359 |
| DOI | 10.7717/peerj.19982 |
| 产权排序 | 3 |
| 文献子类 | Article |
| 英文摘要 | Copper (Cu), a toxic trace element, has extensively accumulated in soils due to intensive human activities. Yet current knowledge on Cu sources and biogeochemical processes in Cambisols under varying land uses is scant. In this study, Cu contents, stable isotope compositions (delta Cu-65) and their correlations with soil physicochemical properties in soil profiles across different land uses were analyzed, including cropland, abandoned cropland and orchard, shrub-grass land, and secondary forest in a karst watershed of Southwest China. Soil Cu contents in cropland (mean 44.9 mg kg (-1)) were significantly higher than those in abandoned cropland and orchard (mean 37.7 mg kg (-1)), and much higher than those in natural lands (mean 26.3 mg kg (-1)). In agricultural lands, cropland soils (mean -0.216 parts per thousand) were significantly Cu-65-depleted compared to abandoned cropland and orchard (0.020 parts per thousand), resulting from applying Cu-65-depleted fungicides. Soil delta Cu-65 values in shrub-grass land and secondary forest land exhibited within a wide range, from -0.627 parts per thousand to 0.338 parts per thousand, attributed to Cu isotope fractionations during pedogenic processes. Soil delta Cu-65 values decreased with increasing soil depth and were positively correlated with soil organic carbon (SOC) contents, but negatively correlated with the chemical index of alteration (CIA), indicating the influences of clay mineral sorption, organic complexation, and leaching processes on soil delta Cu-65 patterns. In different regions, delta Cu-65 values in Cambisols increased in sub-humid climate, but decreased in humid climate with increasing annual precipitation. This study underscores the key roles of mineral sorption, organic complexation, and leaching processes in affecting delta Cu-65 patterns in Cambisols. |
| URL标识 | 查看原文 |
| WOS关键词 | FRACTIONATION ; SPECIATION ; RATIOS ; CU ; ADSORPTION ; CATCHMENT ; MOBILITY ; TRACERS ; ZN |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:001569119400001 |
| 出版者 | PEERJ INC |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/216023]  |
| 专题 | 管理部门_平台基建处_理化分析中心 |
| 通讯作者 | Han, Guilin |
| 作者单位 | 1.China Univ Geosci Beijing, Inst Earth Sci, Beijing, Peoples R China; 2.Chinese Acad Sci, Wuhan Bot Garden, Wuhan, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Man,Han, Guilin,Zhang, Qian. Soil copper sources and biogeochemical processes under different land uses: insights from stable copper isotopes in the Cambisols of Southwest China[J]. PEERJ,2025,13:e19982. |
| APA | Liu, Man,Han, Guilin,&Zhang, Qian.(2025).Soil copper sources and biogeochemical processes under different land uses: insights from stable copper isotopes in the Cambisols of Southwest China.PEERJ,13,e19982. |
| MLA | Liu, Man,et al."Soil copper sources and biogeochemical processes under different land uses: insights from stable copper isotopes in the Cambisols of Southwest China".PEERJ 13(2025):e19982. |
入库方式： OAI收割
来源：地理科学与资源研究所
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