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Esko Kangas (email)

Kuusikoiden kuivumisesta metsätuho- ja metsänhoidollisena kysymyksenä

Kangas E. (1946). Kuusikoiden kuivumisesta metsätuho- ja metsänhoidollisena kysymyksenä. Acta Forestalia Fennica vol. 52 no. 5 article id 7383. https://doi.org/10.14214/aff.7383

English title: Drying of Norway spruce stands as forest damage and forest management issues in Finland

Abstract

Observatons of drying of Norway spruce (Picea abies (L.) Karst.) stands increased in 1930s in Southern Finland. The aim of the study was to analyse the advance and causes of drying. The work was begun in 1930s before the Second World War, and the damages caused to the forests by the war was used as supplemental observations in the study. A special method, drying analysis, was developed to study the process. It was used both in cases of insect and fungal diseases in the four research areas in Raivola and Ruotsinkylä. In addition, 7 observation areas were studied.

Several causes for drying of the trees were observed in the Norway spruce stands. These included European spruce bark beetle (Dendroctonus micans), root rot (Heterobasidion annosum), pine weevils (Pissodes sp.), bark beetles and honey fungus (Armillaria mellea).

The role of primary and secondary causes for drying, resistance of the trees and the drying process are discussed. Finally, the influence of forest management in drying process is analysed. Forests in natural state can be considered to be in an ideal balance. On the other hand, forest management can be used to maintain the vitality and resistance of the forests. Drying of Norway spruce stands can be taken into consideration when the stands are managed.

The PDF includes a summary in German.

Original keywords
kuusi; metsänhoito; metsätuhot; hyönteistuhot; kuusikko; sienitaudit; juurikääpä; laho; kuivuminen; maannousema

English keywords
forest management; Norway spruce; Picea abies; root rot; forest damage; insect damage; fungal diseases

Published in 1946

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Available at https://doi.org/10.14214/aff.7383 | Download PDF

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