Ozone, acid deposition, and mycorrhization effects on loblolly pine and white oak: II. Nutrition and water relations

摘要

Effects of tropospheric O3 (0.0, 0.06, and 0.12 #mu#L L-1), acid precipitation (pH 4.8, 4.2, and 3.6), and induced ectomycorrhizal colonization (Pisolithus tinctorius vs. natural mycobiont), alone and in combination, on soil and seedling nutrition andwater relations in loblolly pine (Pinus taeda) and white oak (Quercus alba), were examined. Nutritional assessment included analysis for essential elements plus Al in soils and foliage and calculation of a series of base cation:metallic element molar ratios. Among treatment effects on soils, pH of those in which loblolly pine were grown declined with increasing O3 and rainfall acidity and that of the white oak soils with the latter, while S increased with rain acidity in the soils of both species. The K