PIXE as a tool for determination of acidified forests

The trace element content along tree cores of Norway spruce (Picea abies), collected at the experimental area E67 Faexboda, has been analysed by means of PIXE. Trace element content profiles along tree cores from trees grown on plots exposed to dolomite liming, sulphuric acid acidification and on reference plots have been determined. Changes, correlated to the acidification, have been observed. Calcium and the mangansese/calcium ratios within a sample possess strong correlations to the artificial acidification at the experimental area. Local factors, like a high calcium content, are likely to influence the result. (orig.)