Effects of acidic precipitation on the soil chemistry and bioavailability of aluminum, manganese, and copper

Technical Report · Sat Dec 01 00:00:00 EST 1990

OSTI ID:6064302

Stam, A C ^[1]; McLaughlin, S B ^[2]; McCormick, J F ^[3]

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1. Univ. of New York, Syracuse, NY (USA). Coll. of Environmental Science and Forestry
2. Oak Ridge National Lab., TN (USA)
3. Dabney S. Lancaster Community Coll., Clifton Forge, VA (USA)

The effects of acidic precipitation on the soil solution chemistry and bioavailability of Al, Mn, and Cu in soils from spruce-fir and oak-hickory forests were examined in laboratory, greenhouse, and field studies. Simulated acidic precipitation increased LMAI concentrations in the laboratory equilibration and greenhouse studies, but not in the field plot studies in oak-hickory and spruce-fir forests. In all studies, acidic treatments decreased NLMAI concentrations following treatment. These results confirm the hypothesis that acidic precipitation can alter the speciation of soil solution Al. The plant actively influenced soil Al chemistry through rhizosphere acidification and effects on soil organic matter. Loblolly pine and red spruce increased rhizosphere concentrations of total monomeric Al (TMAI) and NLMAI. The pine also increased LMAI concentrations. The plant influenced acidic treatment effects on rhizosphere Al although the effect varied with tree species and soil type. The results confirm the hypothesis that the plant can moderate the effects of acidic precipitation on soil Al chemistry. Acidic treatment only increased Al bioavailability in the greenhouse study of loblolly pine potted in mineral soil with comparatively low exchangeable Ca/Al. There was no evidence of enhanced Al bioavailability under acidic treatment in any of five plant species treated in the field studies or in loblolly pine and red spruce in the greenhouse studies. Mobilization of soil Al versus Ca by acidic treatment appears to be related to the Ca/Al exchange status of a soil. 96 refs., 13 figs., 22 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6064302
• Report Number(s): ORNL/TM-11569; ON: DE91010447
• Resource Relation: Other Information: Thesis (Ph.D.). Thesis submitted by A.C. Stam to the University of Tennessee; Related Information: Environmental Sciences Division, publication no. 3507
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
01 COAL, LIGNITE, AND PEAT
ACID RAIN
ENVIRONMENTAL EFFECTS
ALUMINIUM
BIOLOGICAL AVAILABILITY
COPPER
FORESTS
PRODUCTIVITY
MANGANESE
FIRS
GENETIC VARIABILITY
HERBS
ION EXCHANGE
NAPAP
OAKS
ORGANIC MATTER
PH VALUE
PINES
SIMULATION
SOIL CHEMISTRY
SPRUCES
ATMOSPHERIC PRECIPITATIONS
BIOLOGICAL VARIABILITY
CHEMISTRY
CONIFERS
ELEMENTS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
METALS
PINOPHYTA
PLANTS
RAIN
TRANSITION ELEMENTS
TREES
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology
010900 - Coal
Lignite
& Peat- Environmental Aspects