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Evaluation of Norway spruce forest plantation under air pollution load after the application of a slow-release forest tablet fertilizer Silvamix MG
2002
Sarvas, M. | Tucekova, A. | Seben, V. (Forest Research Institute, Zvolen (Slovak Republic))
Fertilization plays an essential role in forest management on the site being under air pollution load in last years. The soil acidity due to the acid fall-out is markedly worse and at the same time the concentration of calcium, phosphorous, potassium and magnesium are decreasing. The fertilization besides positive influence on height increment could help in adaptation process of plants establishment after transplanting and it can eliminate negative ifluence of anthropogenic conditions of the environmnet
Показать больше [+] Меньше [-]Impact of elevated O3 trembling aspen (Populus tremuloides MICHX.) leaf epicuticular waxes and elemental composition of leaves
2002
Mankovska, B. (Forest Research Institute, Zvolen (Slovak Republic)) | Karnosky, D. F. | Percy, K. | Ermakova, E. | Frontasyeva, M.
Foliage of three trembling aspen clones differing in O3 tolerance from Rhinelander, Kenosha and Kalamazoo were examined for 24 elements in the year 2001 and they were analyzed by INAA at reactor IBR-2, by AAS Varian 400 and by elemental analyzer LECO SC 132 and SP 228. In the fofliage of trembling aspen we found no statistically significant difference in the concentration of 22 elements except for K and Ni between clones. For the concentrations of elements between localities we found statistically significant difference for Al, Ba, Ca, Cd, Cl, Co, Cu, La, Mo, Na, Ni, Pb, Sm, Sr and Zn
Показать больше [+] Меньше [-]Bioindication of immmission load lowering with change of the aluminium production technology
2002
Mankovska, B. (Forest Research Institute, Zvolen (Slovak Republic))
Problems of the environment pollution in Ziarska basin are connected with the operation of Aluminium plant from 1953. After replacement of old production technology by a a new one by Norwegian company Hydro Aluminium emission of dust of Al2O3 dropped from 766 tons per year to 243 tons per year, emission of fluorides dropped from 847 to per year to 65.9 tons per year and of SO2 have increased from 716 to 974 tons per year. The mentioned reduction of emission reflected markedly in a great reduction of vegetation loading by fluorine. In the year 2001 we found statistically sifnificant difference for total Ksupz (coefficient of loading) in coniferous and broadleaved tree species in A polution zone in comparison with the zone B, C and D
Показать больше [+] Меньше [-]Long-term changes of soil chemical parameters in forests of Saxony (Germany)
2002
Raben, G. | Symossek, F. | Katzschner, W. | Gemballa, R. | Karst, H. | Kohler, S. | Nowatzki, O. (Saxon State Institute of Forestry, Pirna (Germany))
Taking into account the results of environmental monitoring in forest ecosystems (European Level I- and II-Programme) showing high degrees of soil acidification and still a widespread exceedance of critical loads by deposited sulphur and nitrogen compounds, the programme of differentiated forest protection liming should continue with site specific doses. On the other hand the programme to restore forest ecosystems with higher stability and to a large extent balanced nutrient cycles has to be carried out in order to minimize internal acid-generating processes
Показать больше [+] Меньше [-]Linking air pollution and forest health: how are we doing?
2002
Percy, K. E. (Natural Resources Canada, Fredericton (Canada). Canadian Forest Service-Atlantic Forestry Centre) | Karnosky, D.F.
Scientific concern over air pollution impacts on forest health and ecosystem function have evolved from local (point-source), to regional (area source) and ultimately to the global scale (increasing atmospheric CO2). All three scales of investigation remain relevant to increasing our understanding of how air pollution affects forests. Presently, linking air pollution with forest health status through routine monitoring network data remains problematic. In this paper we present a brief overview of air pollutant trends, together with recent European forest condition monitoring and FACE experimental case-study evidence to illustrate the need for multiple-level investigation of air pollutant-forest interactions
Показать больше [+] Меньше [-]Mechanised site preparation and restoration of degraded site
2002
Ulbrichova, I. | Podrazsky, V. (Czech University of Agriculture, Prague (Czech Republic). Faculty of Forestry)
It was performed the study of the humus forms, quantity and pedochemical characteristics, further the study of plantation growth, and the dynamics in the period of 1994-1999. Negative impacts of the bulldozing were documented, acidification in the period 1994-1999 and the ameliorative role of the birch stand as well
Показать больше [+] Меньше [-]Attempt of using peach plant antioxidant system elements changes as a test-factor of acid stress
2002
Klymenko, O.E. | Klymenko, M.I. (Nikita Botanical Gardens UAAS, Simferopol (Ukraine). Steppe Department)
It was established the strong changes in elements of antioxidation system by the influence of acid stress. The different reaction of varieties in these conditions was discovered. More early ripening varieties were more sensitive to acid stress. The relative indexes of plant antioxidation system conditions were calculated. The relative evaluation of the sensitivity of studied varieties to the acid stress was done by those indexes. We propose to use index of common recovering activity of tissue as a test index for the estimation of different peach varieties to acid stress
Показать больше [+] Меньше [-]Consequences of elevated CO2 and O3 on birch canopy structure
2002
Kull, O. (University of Tartu, Tartu (Estonia). Institute of Botany and Ecology) | Tulva, I. | Vapaavuori, E.
We studied elevated CO2 and ozone effects in single and in combination on crown structure of two Betula pendula clones. Shoot ramification, shoot length, number of metamers, leaves and buds were measured at four heights in every tree. Chamber effect was substantial on sylleptic branching and on shoot length and ramification. However these responses differed between the clones. Ozone treatment affected shoot length and caused slight decrease in shoot ramification. Elevated CO2 affected appearance of long shoots in complex manner, but in lower crown positions CO2 caused increased number of long shoots in both clones
Показать больше [+] Меньше [-]Acid rains in Belgrad forest, Istanbul
2002
Serengil, Y. (University of Istanbul, Istanbul (Turkey). Faculty of Forestry)
The results showed that the hydrogen load had a very significant variation between the two monitoring years. In 1999-00 water year, hydrogen load was 4.72 kmol/ha, while in 2000-01 it was 1.70 kmol/ha. Although the observed pH values of rainwater never got over 7.0, high values around 6.0 were determined in summer moonths. The average equivalent concentrations of measured ions were calculated and an equilibrium between anions and cations was found
Показать больше [+] Меньше [-]Implementation of remediation measures in forests with the emphasis on the forests in Spis region
2002
Vosko, M. (Forest Research Institute, Zvolen (Slovak Republic))
Major part of implemented measures was aimed at early artificial forest regeneration and securing plantations, or protection of young forest stands against damage by bark beetles. Only exceptionally there were proposed measures with the aim to increase vitality, stability and improvement of the structure of forest stands by their tending. It was worked out a draft of procedures for forest managers to help them in deciding at which stocking it is necessary to reforest reduced or actual clearings, whether to fell down open stands or to leave them regarding their age, state and expected further development
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