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2 Uppsatser om Barkgnag - Sida 1 av 1

Älgens barkgnag på granstammar : omfattning med avseende på geografisk utbredning, skadad volym och ekonomiska konsekvenser

In three areas in the province of Småland studies has been done to investigate how big damage the moose may do to P. abies. An inquiry examination and two different types of surveys were done to find out how big area, which volume and which financial consequences the moose debarking has had on the forest. When the volume was calculated the rot spreading was included. The area that was damaged was stipulated with the answers from the inquiry examination. 59 % of the asked forest owners answered the inquiry.

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The modern silvicultural practices of today, with cutting by compartments, have led to a large benefit for the moose population through the cleared areas which produces large amount of fodder. This new landscape can produce and feed a large moose population. But it will cause a conflict effect towards the landowners; the conflict consists of browsing mainly in the young pine forest. The result from browsing and damage will be sparse stands with reduced growth and technical damage like leader shoot browsing, stem breaking and damage of the bark. Technical damage can kill the tree or damage it so hard that it would not work as future saw timber.