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Kustaa Seppälä

Kuusen ja männyn kasvun kehitys ojitetuilla turvemailla

Seppälä K. (1969). Kuusen ja männyn kasvun kehitys ojitetuilla turvemailla. Acta Forestalia Fennica no. 93 article id 7611. https://doi.org/10.14214/aff.7611

English title: Post-drainage growth rate of Norway spruce and Scots pine on peat.

Abstract

The present study is an attempt to establish the response to drainage of Norway spruce (Picea abies (L.) H. Karst.) and Scots pine (Pinus sylvestris L.) on some peatland sites, and to determine the revival of the trees and continuance of the growth after drainage. Growth of trees in four types of peatland types of drained peatlands drained between 1908-1918 were studied, and the results were compared with corresponding mineral soil sites

In pine the response to drainage was faster than in spruce in all age classes. Even the oldest groups of trees showed as good growth as trees of the same size growing on mineral soils. The rapidity of revival and the radial growth maximum are affected by the age of the tree at the time of ditching and the site fertility. The size of the trees, too, is of importance for the magnitude of post-drainage radial growth; the influence is similar in different sites. The basal area growth of trees growing on peat usually showed an unbroken increase during the entire post-drainage period. Neither the height growth indicates a decline in growth over time.

In the light of the results from sample tree analysis, it seems that tree growth gradually rises even after the revival period in peatlands originally covered by forest. The are some errors in the comparisons made, but it can be observed that aging of drainage areas as such does not mean that growth conditions become poorer.

The PDF includes a summary in English.

Original keywords
ojitetut suot; turvekankaat; kasvun elpyminen; mänty; kuusi; läpimitan kasvu; kasvu; pituuskasvu

English keywords
drained peatlands; Norway spruce; Picea abies; Scots pine; Pinus sylvestris; growth; revival; height growth; diameter growth

Published in 1969

Available at https://doi.org/10.14214/aff.7611 | Download PDF

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