Soil aggregate-associated heavy metals subjected to different types of land use in subtropical China
文献类型：期刊论文
| 作者 | Liu, Yi1; Liu, Wenzhi1; Li, Zhiguo1; Chen, Fang1; Wang, Li1; Deng, Amei1,2 |
| 刊名 | GLOBAL ECOLOGY AND CONSERVATION
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 16页码:9 |
| 关键词 | Land cover Particle size fraction Soil organic matter Trace metals |
| ISSN号 | 2351-9894 |
| DOI | 10.1016/j.gecco.2018.e00465 |
| 英文摘要 | Heavy metal distribution in soils is strongly influenced by soil aggregate size. In this study, we collected surface soil samples from farmlands (FL), woodlands (WL), and bare lands (BL). Air-dried soils were sieved into four size fractions (>3, 1-3, 0.25-1, and <0.25 mm in diameter) to determine the concentrations of eight heavy metals (Cd, Cr, Cu, Ni, Pb, Zn, As, and Mn) in soil aggregates using wet digestion method. Our results found that the amount of macroaggregates (>0.25 mm) was significantly higher than that of microaggregates (<0.25 mm) in all soil samples. Moreover, the proportion of large macroaggregates (>3 mm) showed an order of FL > ML > BL, while the proportion of microaggregates (<0.25 mm) showed an order of FL < ML < BL. The soil Cd and Pb levels in woodlands were significantly higher than those in farmlands and bare lands. In addition, the concentrations of soil Cu and Zn were elevated in farmlands compared to woodlands and bare lands. For the aggregate-associated heavy metal, contents of most metal elements (except As) in soil aggregates slightly decreased with increasing size class in farmlands. Heavy metals were generally depleted in the larger aggregates but enriched in the smaller aggregates. Interestingly, soil organic matter content was positively related to soil Cd, Cr, Ni, and Pb concentrations, but negatively correlated with soil Cu and As levels. The findings suggest that land use changes can affect the concentrations of soil aggregate-associated heavy metals, and these effects vary among different metals. (C) 2018 The Authors. Published by Elsevier B.V. |
| 资助项目 | National Natural Science Foundation of China[31670528] |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000454994500024 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/6420]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Liu, Yi |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Wuhan Lib & Intelligence Ctr, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yi,Liu, Wenzhi,Li, Zhiguo,et al. Soil aggregate-associated heavy metals subjected to different types of land use in subtropical China[J]. GLOBAL ECOLOGY AND CONSERVATION,2018,16:9. |
| APA | Liu, Yi,Liu, Wenzhi,Li, Zhiguo,Chen, Fang,Wang, Li,&Deng, Amei.(2018).Soil aggregate-associated heavy metals subjected to different types of land use in subtropical China.GLOBAL ECOLOGY AND CONSERVATION,16,9. |
| MLA | Liu, Yi,et al."Soil aggregate-associated heavy metals subjected to different types of land use in subtropical China".GLOBAL ECOLOGY AND CONSERVATION 16(2018):9. |
入库方式： OAI收割
来源：武汉植物园
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