Selenium uptake by plants from soils amended with inorganic and organic materials

Ajwa, H.A. and Bañuelos, G.S. and Mayland, H.F. (1998) Selenium uptake by plants from soils amended with inorganic and organic materials. Journal of Environment Quality. 27:1218-1227.

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Abstract

Depending on its concentration and chemical form, Se functions
as an essential element or potential toxicant to humans, livestock,
and waterfowl. Application of seleniferous organic materials to soils
may increase plant-available Se content and pose health hazards.
This study assessed Se uptake by two successive plantings of canola
(Brassica napus cv. Westar) and multiple clippings of tall fescue
(Festuca arundinacea L. cv. Fawn) grown in soils (Hanford sandy
loam (coarse-loamy, mixed, thermic Typic Durixeralfs) and Panoche
clay loam (fine-loamy, mixed, superactive, thermic Typic Torriorthents)]
amended with 1.5 mg Se kg-' soil as inorganic selenate (Se
2 4) or seleniferous organic materials alfalfa (Medicago sativa L.),
Astragalus praelongus, or cattle (Bos tauris) manure] under growth
chamber conditions. Tissues of canola and tall fescue accumulated
much greater concentrations of Se from the inorganic Se0,2,- treatment
compared to the treatments with seleniferous organic materials. The
addition of crop residue or animal manure to the Se0,2,- -treated soils
considerably reduced Se accumulation by both plant species. In soils
amended with seleniferous organic materials, more than 80% of the
Se remained in soils after two plantings of canola and all clippings
of tall fescue. The slow release of plant-available Se in soils amended
with seleniferous organic materials suggests the use of these materials
to control the concentrations of Se in crops grown on nonseleniferous
soils.

Item Type:	Article
NWISRL Publication Number:	0968
Subjects:	Soil > Chemistry > Selenium Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:54
Last Modified:	18 Nov 2016 16:03
Item ID:	699
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/699