Soil Sulfur Amendments Suppress Selenium Uptake by Alfalfa and Western Wheatgrass

Mackowiak, Cheryl L.; Amacher, Michael C.

doi:10.2134/jeq2007.0157

Cited by 40 publications

(16 citation statements)

References 40 publications

(43 reference statements)

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“…All study soils had 50 to 250 times higher SO^^ -S concentrations than total Se concentrations; the abundant SO^^~ likely interfered with the uptake of Se. Mackowiak and Amacher (2008) reported in an experiment with seleniferous soils that S as soil amendment decreased the Se uptake by forage plant species significantly. This would be particularly true for the likely minor Se(VI) which is taken up by soil organisms and plant roots via the same assimilatory pathway as SO^^~.…”

Section: Total Sulfur and Sulfate Concentrations And Stable Sulfur Ismentioning

confidence: 99%

Selenium Partitioning and Stable Isotope Ratios in Urban Topsoils

Schilling

Wilcke

2011

Soil Science Soc of Amer J

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A combination of sequential extraction with stable isotope ratio measurements of Se might offer new insights into biogeochemical processes governing Se turnover in soils. Therefore, we determined the Se partitioning among three operationally defined sequential extracts (0.1 mol L"' KjHPO^-KHjPO^ at pH 7,0.05 mol L"' NaOH, cone.HNOj) and the stable isotope ratios of total Se (^''^''^Se values) in 10 topsoils under 5 different land uses (alluvial grasslands, forests, house gardens, parks, and roadside grassland) from the city of Bayreuth (ca. 73,000 inhabitants) in Germany. Furthermore, we detetmined S and SO^^" concentrations and stable isotope ratios of total S (ä'^S values) to support our interpretation ofthe Se concentrations and isotope ratios because of the chemical similarity of Se and S. All topsoils had low total Se concentrations (0.09-0.52 mg kg~ ). The latgest conttibution to total Se was extracted with NaOH compdsing up to 42%,which is thought to be associated with organic matter and metal oxides. The 5 ' Se values of total Se in the topsoils were close to the bulk Earth composition with an average J82//65Ç value of -0.03 + SD 0.38%c suggesting that there was no or linle Se isotope fractionation in soil. We attribute the small isotope fractionation to the low bioavailability of Se as a consequence ofthe presence of Fe oxides (adsorbing the dominating Se(IV) forms strongly), organic matter, and SO^ (prevents biouptake ofthe Se(IV) forms) in the study soils. Small Se isotope fractionations of-0.59 to -0.35%o in mainly forest soils and of 0.26 to 0.45%o in mainly alluvial soils were presumably caused by soil/plant-recycling and Se contamination by river water, respectively In spite ofthe similarities in the assimilation of S and Se by organisms, the total S and Se isotope ratios in soil were not correlated. Our results demonstrate that Se in urban soils developed ftom Se-poor substrates is minimally cycled through the biosphere likely because of low bioavailability and competition with SO, 2-

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Section: Total Sulfur and Sulfate Concentrations And Stable Sulfur Ismentioning

confidence: 99%

Selenium Partitioning and Stable Isotope Ratios in Urban Topsoils

Schilling

Wilcke

2011

Soil Science Soc of Amer J

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“…Selenium (Se) is an essential nutrient in animal systems, but high concentrations can threaten biological systems when human activities, such as mining into shale for oil and phosphorus or irrigating arid and semiaridlands, produce seleniferous soils [92]. Plants can accumulate Se from the impacted soils [93]. Plant accumulation and soil ingestion lead to Se bioaccumulation and Se poison in livestock and wildlife [94,95].…”

Section: Nanoscale Zero-valent Iron Particles (Nzvi)mentioning

confidence: 99%

Nanoenhanced Materials for Reclamation of Mine Lands and Other Degraded Soils: A Review

Liu

Lal

2012

Journal of Nanotechnology

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Successful mine soil reclamation facilitates ecosystem recovery, minimizes adverse environmental impacts, creates additional lands for agricultural or forestry uses, and enhances the carbon (C) sequestration. Nanoparticles with extremely high reactivity and deliverability can be applied as amendments to improve soil quality, mitigate soil contaminations, ensure safe land–application of the conventional amendment materials (e.g., manures and biosolids), and enhance soil erosion control. However, there is no report on using nanoenhanced materials for mine soil reclamation. Through reviewing the up-to-date research results on using environment-friendly nanoparticles for agricultural soil quality improvement and for contaminated soil remediation, this paper synthesizes that these nanomaterials with high potentials for mine soil reclamation include zeolites, zero-valent iron nanoparticles, iron oxide nanoparticles, phosphate-based nanoparticles, iron sulfide nanoparticles and C nanotubes. Transport of these particles in the environment and their possible ecotoxicological effects are also discussed. Additionally, this article proposes a practical and economical approach to applying nanotechnology for mine soil reclamation: adding small amounts of nanoparticles to the conventional soil amendment materials and then applying the mixtures for soil quality improvements. Hence the cost of using nanoparticles is reduced and the benefits of both nanoparticles and the conventional amendment materials are harnessed.

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“…Several studies revealed no effect of sulphate on selenite absorption by crops (Li et al 2008;Zhang et al 2006). On the contrary, either in potted experiments or field trials, significant reductions were found in the uptake of Se by crops such as alfalfa, wheat, and rice, when sulphate was applied into selenite-amended soils (Dhillon and Dhillon 2000;Liu et al 2015;Mackowiak and Amacher 2008). Given the inconsistent findings in the literature, it is necessary to clarify the absorption mechanisms of selenite in crops in relation to sulfate.…”

Section: Introductionmentioning

confidence: 99%

Effect of sulphate on selenium uptake and translocation in rape (Brassica napus L.) supplied with selenate or selenite

Zhao

et al. 2015

Plant Soil

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Aims To clarify the effect of sulphate on the uptake and translocation of selenium (Se) by rape (Brassica napus L.) with Se applied as selenite or selenate. Methods Three hydroponic experiments were conducted at the seedling stage of B. napus. Selenium concentrations in plant and culture solution samples were analyzed by hydride generation atomic fluorescence spectrometry (HG-AFS-8220). Results The Se absorption capacity of B. napus supplied with selenate or selenite was the same at 0.1 mM sulphate. The translocation factor of Se was significantly reduced by up to 46.4 % with increasing selenite in solution, while sulphate had no effect on Se translocation in selenite treatment. The translocation factor of Se was substantially increased by up to 60.5 % with increasing selenate in solution, and the application of sulphate appeared to facilitate Se translocation in selenate treatment. The positive effect of sulphate was more significant with extended treatment time, but unrelated to selenate or sulphate concentration. Conclusions The Se absorption capacity of B. napus supplied with selenite or selenate depends on the concentration of sulphate. Sulphate is involved in the rootto-shoot translocation of Se in B. napus supplied with selenate, but not selenite. These results need confirming in pot and field trials.

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Soil Sulfur Amendments Suppress Selenium Uptake by Alfalfa and Western Wheatgrass

Cited by 40 publications

References 40 publications

Selenium Partitioning and Stable Isotope Ratios in Urban Topsoils

Selenium Partitioning and Stable Isotope Ratios in Urban Topsoils

Nanoenhanced Materials for Reclamation of Mine Lands and Other Degraded Soils: A Review

Effect of sulphate on selenium uptake and translocation in rape (Brassica napus L.) supplied with selenate or selenite

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