Affiner votre recherche
Résultats 1-2 de 2
Long-term effect of alkaline air pollutants on forest ecosytems
2002
Caboun, V. | Mindas, J. | Priwitzer, T. | Pavlenda, P. | Istona, J. | Pavlendova, H. (Forest Research Institute, Zvolen (Slovak Republic))
The effect of alkaline air pollutants appears on 98% of the area of forests in Slovakia. Despite a local impact of magnesite air pollutant type is very significant as to the degree and extent of damage. Despite enormous efforts of magnesite plants only a low reduction of dust fallout was reached. While in the years 1978-1979 emission of Mg dust reached 7396.5 tons and emission of SO2 1133.5 tons, in the years 1990-1991 respective figures were 1174.5 tons of Mg dust and 1114 tons of SO2. It means that the amount of emitted SO2 has not changed but the amount of emitted dust has dropped 6.5 times. On the basis of research results the whole attacked territory was divided into four zones of endangerment and there were tested various reclamation and revitalization measures successfully
Afficher plus [+] Moins [-]Changes in forest ecosystems under the influence of alkalizing the environment pollutants
2002
Armolaitis, K. | Stakenas, V. | Raguotis, A. (Lithuanian Forest Research Institute, Kaunas (Lithuania))
The alkalinization has a positive influence on soil microflora abundance. The number of ammonifiers nearby the plant is greater by 2-4 times than in relatively unpolluted soils of the same type, while the amount of denitrifiers and anaerobic nitrogen-fixing microorganisms even by 20-50 times. Alkalinization has induced biological soil activity. The data obtained are compared with the data of analogous studies conducted on forest ecosystems affected by acidifying pollutants
Afficher plus [+] Moins [-]