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Reduction of timber value from damaged spruce stands after their dieback

Author

Listed:
  • R. Petráš

    (Forest Research Institute, Zvolen, Slovak Republic)

Abstract

The paper presents a method for the derivation of total timber production and of increments in value units, particularly in net financial yield for spruce stands damaged by crown defoliation after their dieback. The value production was derived by means of value growth models of undamaged stands and models for the adjustment of volume and qualitative production of damaged and died stands. Changes in timber quality after tree drying and changes in the production of damaged stands compared with undamaged ones are illustrated in tables and graphs. The changes are expressed by means of the indexes of total mean increment and total current increment. They depend mainly on the degree of stand damage expressed by crown defoliation, age and yield class of stand, the age of stand when the damage started and duration of damage. The value of damaged stands after their dieback is lover minimally by 50% than before their dieback. It is caused mainly by deteriorated quality of timber from dead trees in stand.

Suggested Citation

  • R. Petráš, 2002. "Reduction of timber value from damaged spruce stands after their dieback," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 48(2), pages 80-87.
    • Handle: RePEc:caa:jnljfs:v:48:y:2002:i:2:id:11858-jfs
    DOI: 10.17221/11858-JFS
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