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Evaluation of silver birch diameter increment model based on data of the Czech National Forest Inventory

Author

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  • Jan Kikal
  • Zdeněk Adamec

    (Department of Forest Management and Applied Geoinformatics, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic)

Abstract

In the Czech Republic, the silver birch (Betula pendula Roth.) is considered as a pioneer and a soil preparing tree species. It occurs mainly on clearcutting areas after disturbances. The aim of this study was to fit breast height diameter increment model for birch with respect to tree age, share of birch trees and forest site type (ecological series - ES and forest vegetation zones - FVZ). We used data of both cycles of National Forest Inventory of the Czech Republic. We evaluated production potential of this species. We tested Korf and Michailoff increment models in variant of nonlinear least squares model (NLS) and nonlinear mixed effects model (NLME). Michailoff models performed better. We found seven statistically significant and practically applicable models. The greatest influence on increment of diameter at breast height have forest vegetation zone and ecological series whereas the influence of the share of birch in forest stand is smaller. The highest absolute values of diameter increment were on gleyed or enriched with water sites in the fourth forest vegetation zone.

Suggested Citation

  • Jan Kikal & Zdeněk Adamec, 2020. "Evaluation of silver birch diameter increment model based on data of the Czech National Forest Inventory," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 66(11), pages 471-481.
    • Handle: RePEc:caa:jnljfs:v:66:y:2020:i:11:id:161-2020-jfs
    DOI: 10.17221/161/2020-JFS
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    References listed on IDEAS

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    1. Antonín MARTINÍK & Zdeněk ADAMEC & Jakub HOUŠKA, 2017. "Production and soil restoration effect of pioneer tree species in a region of allochthonous Norway spruce dieback," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 63(1), pages 34-44.
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