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Models for the establishment and height development of naturally regenerated Pinus sylvestris in Finnish Lapland

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The study focused on constructing models for the establishment and seedling height development of naturally regenerated seedling stands in the natural regeneration of Scots pine by the seed-tree method in Lapland, northern Finland. Modelling was used to describe the dynamics of the regeneration process and to analyse the principal ecological factors and management activities influencing regeneration success. Models for the density of seedling stands were developed with the generalized linear mixed model method. The most significant variables affecting seedling establishment were elevation, time since the establishment cutting, the interaction of forest site type and site preparation, and stoniness. The results indicated that the average stocking level tends to remain unsatisfactory on moist, fertile site types without site preparation. Seedling height development was modelled as a function of age using the linear mixed model. Age explained 97% of the variance of seedling height. Other independent variables in the model were effective temperature sum, site preparation and the presence or absence of seed trees.
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Keywords: Early growth; natural regeneration; seedling height model; seedling stand density model; stocking

Document Type: Research Article

Affiliations: 1: Finnish Forest Research Institute, Rovaniemi Research Station, Rovaniemi, Finland 2: Finnish Forest Research Institute, Vantaa Research Centre, Vantaa, Finland

Publication date: 2005-08-01

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