Change in the condition of Norway spruce forests after the installation of desulphurization devices at the Sostanj thermal power plant
1999
Ribaric-Lasnik, C. (Ecological Research and Industrial Cooperation, Velenje (Slovenia)) | Batic, F. | Dejanovic, B. | Simoncic, P.
The state of a forest ecosystem was evaluated by analysis of Norway spruce (Picea abies) after desulphurization of exhaust gases from the Sostanj Thermal Power Plant (STPP). The consequence of reduced SO2 emissions was a smaller annual mean ambient air concentration of SO2 and a corresponding lower accumulation of sulphur in spruce needles in 1996. In 1996 increased defensive mechanisms could be observed in spruce, as shown by an increased content of ascorbic acid in needles in comparison with previous years. An increased vitality of spruce was also evident from the increased content of photosynthetic pigments and the ratio of chlorophyll a to chlorophyll b. The results presented show that the ecological improvement programme of the STPP has been in great measure accomplished.
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