干旱区生态环境知识资源中心(Arid): Geopedology-climate interactions govern the spatial distribution of selenium in soils: A case study in northeastern Brazil

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DOI	10.1016/j.geoderma.2021.115119
	Geopedology-climate interactions govern the spatial distribution of selenium in soils: A case study in northeastern Brazil
	Araujo do Nascimento, Clistenes Williams; Viera da Silva, Fernando Bruno; Fabricio Neta, Adelazil de Brito; Biondi, Caroline Miranda; da Silva Lins, Simone Aparecida; de Almeida Junior, Agenor Bezerra; Preston, Welka
通讯作者	do Nascimento, CWA (corresponding author), Univ Fed Rural Pernambuco, Dept Agron, Dom Manuel de Medeiros St S-N, BR-52171900 Recife, PE, Brazil.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	399
英文摘要	Selenium (Se) is an essential trace element in humans with critical roles in immune functioning and antioxidant systems. Plant foods growing on soils with sufficient Se levels are the primary dietary sources of selenium. Therefore, knowing the factors that drive the concentration of Se in soils is essential to map Se deficiencies and toxicities and implement biofortification programs to enhance foodstuffs' mineral composition. Here, we assessed how geopedology-climate interactions govern the background concentration and spatial distribution of Se in soils from two northeastern Brazil states. A soil geochemical survey covering roughly 110,000 km(2) collected 198 composite samples in sites with minimal anthropogenic influence and wide variation concerning soil types, geological and climatological settings. The samples had their Se concentrations determined by hydride generation atomic absorption spectroscopy (HGAAS) after microwave acid digestion. The results indicate that climate (precipitation) and bedrock are the main broad-scale factors on regional soil Se distribution, while soil contents of clay and organic matter influence Se values locally. Geographically weighted regression (GWR) showed that these factors change over space and exist in a spatial non-stationarity relationship with selenium. Se-deficient soils are most likely to occur in semi-arid settings overlying crystalline rocks, in which pedogenesis and climate drive low contents of clay and soil organic carbon, and Se air-borne inputs are low. The risk of inadequate Se intake by humans and animals in the region is high. This study can aid public policies addressing Se malnutrition in the study region and similar geopedological and climate settings worldwide.
英文关键词	Atmospheric deposition Biofortification Human nutrition Selenium deficiency
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000656902300003
WOS关键词	ADSORPTION-DESORPTION REACTIONS ; ATMOSPHERIC SELENIUM ; AGRICULTURAL SOILS ; BACKGROUND LEVELS ; SORPTION ; CERRADO ; GROUNDWATER ; REGRESSION ; TOPSOILS ; PROVINCE
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368440
作者单位	[Araujo do Nascimento, Clistenes Williams; Viera da Silva, Fernando Bruno; Fabricio Neta, Adelazil de Brito; Biondi, Caroline Miranda; da Silva Lins, Simone Aparecida] Univ Fed Rural Pernambuco, Dept Agron, Dom Manuel de Medeiros St S-N, BR-52171900 Recife, PE, Brazil; [de Almeida Junior, Agenor Bezerra] Fed Inst Pernambuco, Sape Farm Rural Zone S-N, BR-55560000 Barreiros, PE, Brazil; [Preston, Welka] State Univ Rio Grande do Norte, Dept Environm Management, Prof Antonio Campos St, BR-59610090 Mossoro, RN, Brazil
推荐引用方式 GB/T 7714	Araujo do Nascimento, Clistenes Williams,Viera da Silva, Fernando Bruno,Fabricio Neta, Adelazil de Brito,et al. Geopedology-climate interactions govern the spatial distribution of selenium in soils: A case study in northeastern Brazil[J],2021,399.
APA	Araujo do Nascimento, Clistenes Williams.,Viera da Silva, Fernando Bruno.,Fabricio Neta, Adelazil de Brito.,Biondi, Caroline Miranda.,da Silva Lins, Simone Aparecida.,...&Preston, Welka.(2021).Geopedology-climate interactions govern the spatial distribution of selenium in soils: A case study in northeastern Brazil.GEODERMA,399.
MLA	Araujo do Nascimento, Clistenes Williams,et al."Geopedology-climate interactions govern the spatial distribution of selenium in soils: A case study in northeastern Brazil".GEODERMA 399(2021).