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Effects of topography and soil properties on soil selenium distribution and bioavailability (phosphate extraction): A case study in Yongjia County, China
Xu, Yuefeng1,3; Li, Yonghua1,2; Li, Hairong1,2; Wang, Li1,2; Liao, Xiaoyong1,2; Wang, Jing1,3; Kong, Chang1,3
2018-08-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume633Pages:240-248
Corresponding AuthorLi, Yonghua(yhli@igsnrr.ac.cn) ; Liao, Xiaoyong(liaoxy@igsnrr.ac.cn)
AbstractSelenium(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.
KeywordSoils Selenium Bioavailability Soil physicochemical properties Topographical attributes
DOI10.1016/j.scitotenv.2018.03.190
WOS KeywordORGANIC-MATTER ; CLIMATE-CHANGE ; SPATIAL-DISTRIBUTION ; AGRICULTURAL SOILS ; SOUTH-DAKOTA ; RAT MODEL ; GEOCHEMISTRY ; ADSORPTION ; SPECIATION ; USA
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41671499] ; National Natural Science Foundation of China[41671500]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000432475300023
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54811
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLi, Yonghua; Liao, Xiaoyong
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
2.Beijing Key Lab Environm Damage Assessment & Reme, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
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.
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