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Excess nitrogen affects the frost sensitivity of the inner bark of Norway spruce

Author:
  • Anna Maria Jönsson
  • Ulrika Rosengren
  • Bengt Nihlgård
Publishing year: 2004
Language: English
Pages: 293-298
Publication/Series: Annals of Forest Science
Volume: 61
Issue: 4
Document type: Journal article
Publisher: EDP Sciences

Abstract english

The sensitivity to frost in the living inner bark of trees have been hypothesised to be influenced by acid rain and N deposition through changes in nutrient balance and carbon metabolism. At the Skogaby experimental site, situated in southern Sweden, Norway spruce in control plots, plots fertilized with ammonium sulphate and plots fertilized with mineral nutrients except N were compared in this respect. Frost sensitivity was measured by electrolytic leakage and expressed as an index of injury. The results showed increased sensitivity to frost in the bark of trees treated with continuous applications of ammonium sulphate for 11 years. This was probably not only a direct effect of high nitrogen availability, but also caused by insufficient levels of other nutrients due to the rapid growth and changes in soil chemistry induced by the addition of ammonium sulphate. Mainly Mg and K seemed to be of importance for retaining a good frost resistance, supporting the hypothesis that nutrient imbalances increases the risk for development of frost related bark lesions in southern Sweden.

Keywords

  • Ecology

Other

Published
  • ISSN: 1286-4560
E-mail: anna_maria [dot] jonsson [at] nateko [dot] lu [dot] se

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Dept of Physical Geography and Ecosystem Science

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Dept of Physical Geography and Ecosystem Science

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Department of Physical Geography and Ecosystem Science
Lund University
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S-223 62 Lund
Sweden

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