Chloride and sulfate salinity effects on selenium accumulation by tall fescue. [Festuca arundinacea Schreb]
- Univ. of California, Davis (United States)
The discovery of high levels of Se in soil and water samples from the San Joaquin Valley, California, and of its responsibility for deformity and death of wildlife at Kesterson National Wildlife Refuge have renewed interest in the bioaccumulation of this element. Greenhouse nutrient solution culture and field experiments were conducted to examine the effects of Cl and SO{sub 4} salt on growth and Se accumulation in tall fescue (Festuca arundinacea Schreb.) cultivars Alta, Falcon, and Olympic. Sulfate salt substantially reduced growth inhibition and Se accumulation. Tall fescue from the field irrigated with water low in salinity had higher tissue Se concentration than plants from the field irrigated with water high in salinity. No difference in tissue Se concentration was found among the three tall fescue cultivars; however, forage-type Alta produced the most shoot biomass and accumulated the most total Se. The soil irrigated with water high in salinity had 10 times higher Se concentration than soil irrigated with water low in salinity. The highest soil Se concentration was found in the top 15 cm of soil. Growing fescue for one year reduced soil Se by 50%. Selenium concentrations below 15-cm depth were lower and similar between the bare soil and the soil under tall fescue. Both the high and low salinity water irrigations did not cause high levels of Se accumulation by the tall fescue cultivars unless there was continual addition of Se into the system. This study generated important information for Se bioaccumulation management in soils with elevated salinity and Se levels.
- OSTI ID:
- 5618939
- Journal Information:
- Crop Science; (United States), Vol. 31:1; ISSN 0011-183X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GRAMINEAE
PLANT GROWTH
SELENIUM
BIOLOGICAL ACCUMULATION
BIOLOGICAL EFFECTS
CALIFORNIA
CHLORINE
SALINITY
SOILS
SULFATES
TOXICITY
DEVELOPED COUNTRIES
ELEMENTS
GROWTH
HALOGENS
LILIOPSIDA
MAGNOLIOPHYTA
NONMETALS
NORTH AMERICA
OXYGEN COMPOUNDS
PLANTS
SEMIMETALS
SULFUR COMPOUNDS
USA
560300* - Chemicals Metabolism & Toxicology