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Data from: Selenium geochemistry in reclaimed phosphate mine soils and its relationship with plant bioavailability

Metadata Updated: February 4, 2022

Selenium accumulation in vegetation has resulted in toxicity in livestock grazing on phosphate mine soils in Southeastern Idaho. Plant and soil samples were collected from sites located near phosphate mines. Soil physicochemical properties, Se speciation, and Se distribution from a sequential extraction procedure (SEP) were examined in relation to bioavailability in the Se-hyperaccumulator, western aster (Symphyotrichum ascendens Lindl.). Selenium-hyperaccumulators are plants that can absorb over 1000 mg Se kg−1 DM (Dry Matter). Chemical analyses revealed that western aster contained Se exceeding 6000 mg kg−1 DM. Soil speciation results indicated that selenite (SeO32−) was dominant with lower levels of selenate (SeO42−) present. This was expanded using an SEP that accounted for six fractions. Regression analyses indicated a strong relationship for western aster Se and the water-soluble and phosphate-extractable SEP fractions combined (R2 = 0.85). Once carbonate, amorphous Fe-oxide, organic, and residual Se fractions were factored into the analysis, the relationship decreased. A strong relationship between selenate and the water-soluble Se fraction was also observed (R2 = 0.83). Soluble and phosphate-extractable Se were determined to be "bioavailable fractions" for western aster. Thus, simple water extractions can be used for quick assessment of Se bioavailability and provide a means to identify potentially hazardous areas locations.

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Public: This dataset is intended for public access and use. License: Creative Commons CCZero

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Metadata Created Date November 10, 2020
Metadata Updated Date February 4, 2022

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date November 10, 2020
Metadata Updated Date February 4, 2022
Publisher Agricultural Research Service
Identifier 22ba4861-caae-4509-be51-ce9da0d9147e
Data Last Modified 2019-08-05
Public Access Level public
Bureau Code 005:18
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id a6334662-4812-4cb7-ac5c-e11e28dae630
Harvest Source Id d3fafa34-0cb9-48f1-ab1d-5b5fdc783806
Harvest Source Title USDA JSON
Old Spatial {"type":"Polygon","coordinates":-111.42982006073,42.798360699606,-111.54517650604,42.754008157712,-111.49161815643,42.694485578281,-111.38587474823,42.736863440962}
Program Code 005:040
Source Datajson Identifier True
Source Hash 944da67e802c41dc37a079119bcce942607b2225
Source Schema Version 1.1
Spatial {"type":"Polygon","coordinates":-111.42982006073,42.798360699606,-111.54517650604,42.754008157712,-111.49161815643,42.694485578281,-111.38587474823,42.736863440962}

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