Spruce Decline and the Selection of Individual Trees in the Sudety Mts. Forest : Expertentagung Waldschadensforschung im oestlichen Mitteleuropa und in Bayern

1991

S. 533

Unselbständiges Werk

200100794

In the Sudety Mountains (Izerskie and Karkonosze Mts.) spruce stands at 600-700m elevation are dying. More than 11 000 hectars are dead already and further 40 000 hectars are sick and endangered. In the center of the spruce dying region in the Izerskie Mts. the concentration of SO2 in the air is 15.5-24.0 Myg m hoch -3 year hoch -1 and thus it exceeds the Polish norms for specially protected areas by 1.4-2.2 times. The concentration of fluorine also substantially exceeds permissible norms. Concentration of NO2 amounts to 18.3-28.0 Myg m hoch -3 year hoch -1 exceeding permissible norms 2.3-3.5 times. Considerable insolation of the upper parts of the mountains favours ozone formation, the concentration of which exceeds 3.3 times the national norms. Making use of intraspecific variability of trees in reaction to air pollution, in the years 1987 and 1988 we have selected 42 individuals characterized by favourable phenotypic traits and a lower sensitivity to air pollution occuring in this region. These trees were propagated vegetatively and transferred to a clone archive in Kornik.