Interrelations between the concentrations of SO2, NOx from the atmospheric air and S and N from leaves of forestry species. Part 1. Investigations based on data collected in 2010

摘要

The point of the present research was to find possible interrelations between the concentrations of SO 2 , NO x from the atmospheric air and S and N from leaves of forestry species. The samples, respectively the leaves and the needles, have been collected from six trees, from four stations of air quality control within Cluj-Napoca, the trees being represented by different woody species, that have been identified around the stations. The samples have been collected at the end of September, 2010. The majority of the species taken under discussion in case of monitoring stations are strongly to very strongly susceptible to the risk of the expression of physiological diseases as a result of the exposure to nitrogen oxides from the atmospheric air, due to their large capacity of nitrogen accumulation in leaves. The most exposed are Pinus nigra , Picea pungens var. glauca and Tilia cordata , the less exposed is Aesculus hippocastanum , whereas Betula pendula is situated on an intermediary position. ??