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S. E. Multamäki (email)

Kuusen taimien paleltuminen ja sen vaikutus ojitettujen soiden metsittymiseen

Multamäki S. E. (1942). Kuusen taimien paleltuminen ja sen vaikutus ojitettujen soiden metsittymiseen. Acta Forestalia Fennica vol. 51 no. 1 article id 7377. https://doi.org/10.14214/aff.7377

English title: Frost injuries of Norway spruce seedlings and their effect on afforestation of drained peatlands 

Abstract

The aim of the investigation was to study natural regeneration of Norway spruce (Picea abies (L.) Karst.) in drained peatlands and frost injuries in seedlings, and to compare microclimates of the regeneration areas. The experiments included peatlands in Satakunta in Western Finland. Restocking of the areas with seedlings and their survival was followed in 1935-40 at sample plots that were mainly 1 are large.

Susceptibility to freezing was shown to be dependent on the stage of development of the shoots. Shoots that have just begun to grow contain little water, and withstand better freezing temperatures than shoots in later stages of growth. Damages to the seedlings were observed when the temperatures decreased to -2.8–-4.3 °C. The most severe damage to a seedling was caused by the death of the leading shoot by spring frost.

Norway spruce regenerates easily on moist peatlands, but peatlands with dry surface tend to have little or no seedlings. The species regenerated better in marshy sites than correspondingly fertile mineral soil sites. However, it needs shelter to avoid frost damage. On clear cut spruce swamp the undergrowth spruce seedlings that were left in the site got severe frost damage. If the site had birch (Betula sp.) coppice or undergrowth, spruce seedlings survived in their shelter depending on the height and density of the birch trees. To be effective, the protective forest should have relatively even crown cover. Young spruce seedlings could grow well even under relatively dense birch stand.

The PDF includes a summary in German.

Original keywords
kuusi; ojitus; uudistuminen; kylmänkestävyys; turvekangas; pakkasvaurio; keväthalla; ojitettu suo; suojametsä

English keywords
Norway spruce; Picea abies; regeneration; drained peatlands; frost damage; peatlands; frost resistance; spring frost; prorective forest

Published in 1942

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Available at https://doi.org/10.14214/aff.7377 | Download PDF

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