Abstract
A field growth chamber study was conducted to determine the effects of ozone and simulated acid rain (SAR) on soil heavy metals. Loblolly pine (Pinus taeda L.), grown in open-top chambers, was exposed to three concentrations of ozone (charcoal filtered air with 0.026 µL O3 L-1, and two non-filtered treatments in which ozone concentrations were 0.074 µL L-1 and 0.147 µL L-1, respectively) and two levels of SAR (pH 3.5 and 5.2). Ozone was applied for 12 h d-1 for 9 months and acid rain deposition was 125 mm event-1. After 9 months exposure, soil pH, organic matter and DTPA-extractable heavy metals (Cd, Pb, Zn, Mn, Fe, Cu) were determined on soil samples collected from exposed chambers at two depths (0–15 cm and 15–30 cm). Simulated acid rain decreased the original soil pH. The concentrations of Cd, Pb and Mn at SAR pH 3.5 were significantly higher than at SAR pH 5.2. Ozone did not affect Zn, Fe and Cu, but a significant interaction between pH and O3 on Mn, Pb and Cd was observed. Due to the poor drainage capacity of this soil, leaching of heavy metals was not observed.
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© 1995 Springer Science+Business Media Dordrecht
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Nouri, P.A., Reddy, G.B. (1995). Influence of acid rain and ozone on soil heavy metals under loblolly pine trees: A field study. In: Date, R.A., Grundon, N.J., Rayment, G.E., Probert, M.E. (eds) Plant-Soil Interactions at Low pH: Principles and Management. Developments in Plant and Soil Sciences, vol 64. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0221-6_23
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DOI: https://doi.org/10.1007/978-94-011-0221-6_23
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