Effects of acidic precipitation, O3, and soil Mg status on throughfall, soil, and seedling loblolly pine nutrient concentrations

✍ Scribed by G. L. Simmons; J. M. Kelly

• Publisher: Springer Netherlands
• Year: 1989
• Tongue: English
• Weight: 683 KB
• Volume: 43
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00175594

✦ Synopsis

The individual and combined impacts of acidic precipitation, 03, and soil Mg status on nutrient concentrations of throughfall, soil solution, soil, and seedling components were evaluated after one growing season. Loblolly pine seedlings were planted ih a sandy loam soil having approximately 15 or 35 mg kg I of exchangeable Mg and were exposed to subambient, ambient, or twice ambient concentrations of 03 in open top chambers from May through October. Seedlings also received ambient amounts of simulated precipitation at pH 4.0 or 5.3 during this period. Concentrations of nutrients analyzed increased slightly in throughfall, but did not respond significantly to precipitation pH treatments. No increased nutrient leaching and no soil acidification were evident in soil exposed to low pH precipitation after one growing season. Ozone treatments had no significant effects on tissue nutrient concentrations. Interaction responses were very limited and do not suggest any significant synergisms.