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J. Eriksson (email), J. Bergholm, K. Kvist

Injury to vegetation caused by industrial emissions of boron compounds.

Eriksson J., Bergholm J., Kvist K. (1981). Injury to vegetation caused by industrial emissions of boron compounds. Silva Fennica vol. 15 no. 4 article id 5147. https://doi.org/10.14214/sf.a15374

Abstract

At immediate surroundings of a fiberglass plant in Central Sweden, vegetation shows toxicity symptoms. Soils and birch (Betula pendula Roth) leaves were sampled. The soil was analysed for water soluble and organic bound boron, carbon, nitrogen, and pH. Vegetation was analysed for total boron. Both fractions of boron in the soils increased towards the factory. Organic bound boron increased irregularly because of its strong correlation to carbon content which varied in the area. The C/N ratio increased nearer the industry due to the harmful effect of boron on the decomposition of organic matter. No relation between pH and the distance from the emission source was visible, but B/C ratio was found to increase with increasing pH of the soil. Boron levels in birch leaves were elevated very much close to the factory. The geographical distribution of high levels of boron in birch, corresponded well with high values in soils, and also with the main wind directions. The limit values for visible injury on birch were found to be around 5 ppm of water-soluble boron in soil and around 200 ppm in leaves.

Keywords
Betula pendula; boron; soil; Sweden; toxicity; emissions; air pollution; leaves; fiberclass factory

Published in 1981

Views 5440

Available at https://doi.org/10.14214/sf.a15374 | Download PDF

Creative Commons License CC BY-SA 4.0

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