tailieunhanh - Báo cáo lâm nghiệp: "Air pollution load and stand nutrition in the Forest District Jablunkov, part Nýdek"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Air pollution load and stand nutrition in the Forest District Jablunkov, part Nýdek. | JOURNAL OF FOREST SCIENCE 54 2008 2 49-54 Air pollution load and stand nutrition in the Forest District Jablunkov part Nýdek R. Novotny Z. Lachmanová V. Srámek L. Vortelová Forestry and Game Management Research Institute Strnady Czech Republic ABSTRACT Concentrations of air pollutants measured by passive samplers atmospheric deposition to forest ecosystems soil water chemistry nutrient content in the soil and foliage were all measured within a study of the causes of forest decline in Nýdek Forest Range Jablunkov Forest District Silesian Beskids . Declining Norway spruce stands are situated in a region of historically high air pollution load mainly from the Trinec and Ostrava agglomeration. Air pollution significantly decreased in the second half of the 1990s. Forest soils showing the insufficiency of main nutrients remain today as the main factor affecting the forest vitality. The situation in the soil is subsequently reflected in the nutrition level of the assimilation tissues. Simultaneous effects of other stressors . biotic meteorological ones can support a sudden worsening of the stand health and cause serious damage. Keywords deposition stand nutrition spruce decline Silesian Beskids Intensive development of industry in the 1960s and 1970s had a negative impact on forest ecosystems due to a high air pollution load mainly of sulphur dioxide Lomský et al. 2002 Hrdlicka 1990 . The region of the Silesian Beskids is situated in the direction of prevailing winds from Trinec and Ostrava agglomeration with heavy industry concentration. Air pollution decreased in the 1990s when desulphurizing devices were applied by pollution producers and also a great part of the industrial production was decreased. The state of the atmosphere was improved significantly during the 1990s CHMÚ 2001 however long-term acidification in the soil is still an important cause of forest decline and decay. During the last 5 years a slight increase in NO2 and SO2 has been recorded again and .