Effects of topography and soil properties on soil selenium distribution and bioavailability (phosphate extraction): A case study in Yongjia County, China
文献类型：期刊论文
| 作者 | Xu, Yuefeng1,2; Li, Yonghua1,3; Li, Hairong1,3; Wang, Li1,3; Liao, Xiaoyong1,3; Wang, Jing1,2; Kong, Chang1,2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2018-08-15 |
| 卷号 | 633页码:240-248 |
| ISSN号 | 0048-9697 |
| 关键词 | Soils Selenium Bioavailability Soil physicochemical properties Topographical attributes |
| DOI | 10.1016/j.scitotenv.2018.03.190 |
| 通讯作者 | Li, Yonghua(yhli@igsnrr.ac.cn) ; Liao, Xiaoyong(liaoxy@igsnrr.ac.cn) |
| 英文摘要 | Selenium(Se) is an essential trace element for humans. In order to investigate how soil Se is influenced by topography and soil properties, we selected Yongjia County, an area with mountainous topography, as a study area. This study used cultivated soil data to comprehensively analyze the effects of topography and soil properties on Se mobility and bioavailability and to identify the key factors influencing Se distribution in the environment. Factors considered in this study were elevation, slope, topographic wetness index, the coefficient of weathering and eluviation, pH, organic matter, and Fe2O3. The concentration of total soil Se (0.382 +/- 0.123 mg kg(-1)) was far higher than the background value of soil in China, and 98% of the soil samples were classified as having moderate Se levels (>0.175 mg kg(-1)), indicating Yongjia County is a Se-rich region in China. Phosphate extracted Se accounted for an average of 9% of the total Se and was significantly associated with soil total Se, Fe2O3, pH, and the coefficient of weathering and eluviation. Fe2O3 primarily controlled Se adsorption, fixation, and availability in soil. Under the geo-environmental conditions in the study area, the total Se in the soil increased first and then decreased with increases in elevation, slope, and the topographic wetness index, and the phosphate extracted Se showed similar patterns except for the elevation. The findings showed that topographical attributes and soil physicochemical properties synthetically influenced the distribution and bioavailability of Se in soil. (c) 2018 Elsevier B.V. All rights reserved. |
| WOS关键词 | ORGANIC-MATTER ; CLIMATE-CHANGE ; SPATIAL-DISTRIBUTION ; AGRICULTURAL SOILS ; SOUTH-DAKOTA ; RAT MODEL ; GEOCHEMISTRY ; ADSORPTION ; SPECIATION ; USA |
| 资助项目 | National Natural Science Foundation of China[41671499] ; National Natural Science Foundation of China[41671500] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000432475300023 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/54810]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Yonghua; Liao, Xiaoyong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Key Lab Environm Damage Assessment & Reme, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Yuefeng,Li, Yonghua,Li, Hairong,et al. Effects of topography and soil properties on soil selenium distribution and bioavailability (phosphate extraction): A case study in Yongjia County, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,633:240-248. |
| APA | Xu, Yuefeng.,Li, Yonghua.,Li, Hairong.,Wang, Li.,Liao, Xiaoyong.,...&Kong, Chang.(2018).Effects of topography and soil properties on soil selenium distribution and bioavailability (phosphate extraction): A case study in Yongjia County, China.SCIENCE OF THE TOTAL ENVIRONMENT,633,240-248. |
| MLA | Xu, Yuefeng,et al."Effects of topography and soil properties on soil selenium distribution and bioavailability (phosphate extraction): A case study in Yongjia County, China".SCIENCE OF THE TOTAL ENVIRONMENT 633(2018):240-248. |
入库方式： OAI收割
来源：地理科学与资源研究所
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