Full text of this article is only available in PDF format.

Hannu Hökkä (email), Virpi Alenius, Timo Penttilä

Individual-tree basal area growth models for Scots pine, pubescent birch and Norway spruce on drained peatlands in Finland.

Hökkä H., Alenius V., Penttilä T. (1997). Individual-tree basal area growth models for Scots pine, pubescent birch and Norway spruce on drained peatlands in Finland. Silva Fennica vol. 31 no. 2 article id 5616. https://doi.org/10.14214/sf.a8517

Abstract

Models for individual-tree basal area growth were constructed for Scots pine (Pinus sylvestris L.), pubescent birch (Betula pubescens Ehrh.) and Norway spruce (Picea abies (L.) Karst.) growing in drained peatland stands. The data consisted of two separate sets of permanent sample plots forming a large sample of drained peatland stands in Finland. The dependent variable in all models was the 5-year basal area growth of a tree. The independent tree-level variables were tree dbh, tree basal area, and the sum of the basal area of trees larger than the target tree. Independent stand-level variables were stand basal area, the diameter of the tree of median basal area, and temperature sum. Categorical variables describing the site quality, as well as the condition and age of drainage, were used. Differences in tree growth were used as criteria in reclassifying the a priori site types into new yield classes by tree species. All models were constructed as mixed linear models with a random stand effect. The models were tested against the modelling data and against independent data sets.

Keywords
Pinus sylvestris; site quality; Picea abies; Betula pubescens; forest drainage; mixed models; peatlands; growth models

Published in 1997

Views 2325

Available at https://doi.org/10.14214/sf.a8517 | Download PDF

Creative Commons License CC BY-SA 4.0

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Hökkä H., Alenius V. et al. (1997) Individual-tree basal area growth models for Sco.. Silva Fennica vol. 31 no. 2 article id 5616
Penner M., Hökkä H. et al. (1995) A method for using random parameters in analyzin.. Silva Fennica vol. 29 no. 4 article id 5563
Repola J., Hökkä H. et al. (2006) Thinning intensity and growth of mixed spruce-bi.. Silva Fennica vol. 40 no. 1 article id 353
Sarkkola S., Hökkä H. et al. (2004) Natural development of stand structure in peatla.. Silva Fennica vol. 38 no. 4 article id 408
Kojola S., Penttilä T. et al. (2004) Impacts of different thinning regimes on the yie.. Silva Fennica vol. 38 no. 4 article id 407
Nieminen M., Penttilä T. (2004) Inorganic and organic phosphorus fractions in pe.. Silva Fennica vol. 38 no. 3 article id 413
Laiho R., Penttilä T. et al. (2004) Variation in soil nutrient concentrations and bu.. Silva Fennica vol. 38 no. 1 article id 433
Varhimo A., Kojola S. et al. (2003) Quality and yield of pulpwood in drained peatlan.. Silva Fennica vol. 37 no. 3 article id 494
Hökkä H., Penttilä T. (1999) Modelling the dynamics of wood productivity on d.. Silva Fennica vol. 33 no. 1 article id 668