Leo. Heikurainen 
Kuivatuksen tila ja puusto 20 vuotta vanhoilla ojitusalueilla
Heikurainen Leo. (1980). Kuivatuksen tila ja puusto 20 vuotta vanhoilla ojitusalueilla. Acta Forestalia Fennica no. 167 article id 7614. https://doi.org/10.14214/aff.7614
English title: Drainage condition and tree stands on peatlands drained 20 years ago in FinlandAbstract
The aim of this investigation was to examine the dependence of stand volume and increment on different growth factors on drained peatlands drained 20 years ago. Measurements were made in 1977-79 on 35 sample plots in Central Finland on relatively poor pine bogs with a thick peat layer.
It became evident that the stand volume, increment and radial growth and growth development are primarily functions of groundwater depth. Groundwater depth is dependent, in the first place, on ditch depth and ditch condition. With regard to the variation in ditch spacing (ca. 35-70 m) under examination, the effect of ditch spacing on the stand was insignificant. As a practical recommendation it was concluded that ditches should be kept deep enough (> 70 cm) in order to maintain undisturbed stand development.
The PDF includes a summary in English.
Original keywords
mänty;
tilavuuskasvu;
ojitetut suot;
sarkaleveys;
ojien kunto;
pohjaveden pinta;
ojasyvyys
English keywords
Pinus sylvestris;
Scots pine;
stand volume;
ditch spacing;
ditch depth;
volume increment;
groundwater depth;
ditch condition
Published in 1980
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