The influence of birch nurse crop (Betula pubescens) on the growth of Norway spruce (Picea abies) seedling stands on drained peatlands

Heikurainen, Leo

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Silva Fennica vol. 19 no. 1 article id 5233 | 1985 | Article

Leo Heikurainen

Verhopuuston vaikutus kuusitaimikon kehitykseen.

Heikurainen L. (1985). Verhopuuston vaikutus kuusitaimikon kehitykseen. Silva Fennica vol. 19 no. 1 article id 5233. https://doi.org/10.14214/sf.a15412

English title: The influence of birch nurse crop (Betula pubescens) on the growth of Norway spruce (Picea abies) seedling stands on drained peatlands

Abstract

Young Norway spruce (Picea abies (L.) H. Karst.) are susceptible to early summer frost damage. Birch (Betula pubescens Ehrh.) naturally colonize rich or fairly rich drained peatlands after clear cutting, and can provide protection for developing seedlings. The report describes the development of spruce stands after various types of handing of the birch nurse crops.

Different proportions of birch and spruces did not have any influence on the spruce stand production. In cases where the nurse crop stand is removed when the spruce stand age was 20 years and height 4 m the spruce suffered badly but recovered with time, reaching the spruce stand growing under a nurse stand within the next 20 years. The height growth of spruce depends on the density of the nurse stand, especially on fertile sites. The development of diameter growth also depends on the density of the nurse trees. Removal of the nurse stand in spruce stands on the sites concerned should be done when the spruce stand is 20 years old and at the height of 4 m.

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Original keywords
kuusi; metsänhoito; kasvu; ojitetut suot; suojapuusto; pakkasvauriot; hieskoivu; verhopuusto; verhopuuston tiheys; verhopuuston poisto

English keywords
forest management; Norway spruce; Picea abies; Betula pubescens; tree growth; frost damages; nurse stand

Published in 1985

Available at https://doi.org/10.14214/sf.a15412 | Download PDF

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