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Finnish forest management practice recommendations
Promoting good management practice in forestryForests are managed and used sustainablyCommercial forests are managed with due considerations for natural conditionsBiodiversity, protection of watercourses and multiple-use are ensuredRegeneration maturity is determined using the mean diameter measureForests are regenerated quickly and successfullySilvicultural works ensure a high quality growing stockModels indicate the timing and intensity of thinningsHarvesting energy wood supports the production of industrial woodPeat-based forests and boreal forestry pose challenges
Finnish forests
Models indicate the timing and intensity of thinnings
Thinning treatments improve the quality of the timber, speed up diameter growth and produce revenues for the forest owner. The type and intensity of thinning influence the amount of sales revenues. Stands of conifers can be treated with both crown thinning and low thinning.The thinning models have been drawn up based on both tree species and site types. These models use the stage of development of the stand (top height, in metres) and the stand density (basal area, m²/ha) to indicate the need for thinning and the amount of growing stock to be retained.
Data from long-term thinning trials provide the empirical basis for the thinning models. The application of these models results in good outcomes in terms of stand productivity and economics. The number of thinnings varies from one to three depending on the growing stock, site type, thinning intensity, and the forest owner’s economic objectives.
The volume of the growing stock is reduced to the level indicated by the thinning model that is employed. Trees characterised by their poor quality, defects, a secondary position, or trees hindering the growth of dominant trees, are removed in thinnings. When following the models, the temporary loss in growth and risk of storm damage remain within reasonable limits.
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