Two years after last application of sulphuric acid and magnesium lime to the soil of a Scots pine thicket growing in an unpolluted area (NW Poland), concentrations of Ca, Mg, Mn, Cu, Zn, Fe, Cd, Pb and Al in the pine needles of different ages were examined. Soil acidification significantly reduced Ca and Mg concentrations, and raised Al level. In contrast, soil timing increased Ca and Mg, and lowered Al and Mn concentrations. Unexpectedly, lime application led to a significant increase in foliar Zn, Cu, Cd and particularly Pb levels, presumably as an effect of the lime fertiliser contamination. Except Cu and Mg, the concentrations of which significantly decreased with needle age, the examined metals increased or did not change their levels. The tendencies were rather consistent across the treatments, although some site-to-site differences occurred, consisting in variable rates of the changes with time. Although different accumulation rates (mainly Al and Mn) in ageing needles cannot be excluded, the variability seems to have resulted from differences in the treatment effect duration. Thus, Al and Mn were affected for a relatively short time, whereas Cu, Ca, Mg, Zn and Cd (limed site) – for a longer period. Moreover, the effect of soil acidification on Ca and Mg seems to have been slightly intensified with time.
Operational Program Digital Poland, 2014-2020, Measure 2.3: Digital accessibility and usefulness of public sector information; funds from the European Regional Development Fund and national co-financing from the state budget.
Feb 17, 2020
Feb 17, 2020
Włostowski, T. Chętnicki, W. Gierłachowska-Bałdyga, W. Chycak, B.
Pis, T. Cichońska, M. Dudziński, W. Górecki, A.