Intra-annual height increment of Pinus sylvestris at high latitudes in Finland

Intra-annual height growth of Scots pine (Pinus sylvestris L.) in four stands was followed for up to four growing seasons (2000-2003) in the northern boreal zone in Lapland. Elongation of the leader shoot correlated with temperature sum expressed as degree-days. Total length of the leader shoot corr...

Full description

Saved in:
Bibliographic Details
Published in:Tree physiology 2007-09, Vol.27 (9), p.1347-1353
Main Authors: Salminen, H, Jalkanen, R
Format: Article
Language:English
Subjects:
Arctic Regions
boreal forests
Cold Climate
equations
Finland
forest trees
growth models
heat sums
height
latitude
mathematical models
Models, Biological
Photoperiod
Pinus sylvestris
Pinus sylvestris - growth & development
seasonal variation
Seasons
shoots
Temperature
tree growth
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Intra-annual height growth of Scots pine (Pinus sylvestris L.) in four stands was followed for up to four growing seasons (2000-2003) in the northern boreal zone in Lapland. Elongation of the leader shoot correlated with temperature sum expressed as degree-days. Total length of the leader shoot correlated with growth rate but not with duration of the height-growth period. The longer the annual shoot at the end of the season, the greater the height increment per degree- and growing day. Height-growth cessation was defined as the date when 95% of the total shoot length was achieved. In all stands and all years, height growth ceased when, on average, 41% of the relative temperature sum of the site was achieved (range of variation 38-43%). The relative temperature sum was calculated by dividing the actual temperature sum by the long-term mean for the site. Our results suggest that annual height growth is finished when a location-specific temperature sum threshold is attained.
ISSN:0829-318X
1758-4469
DOI:10.1093/treephys/27.9.1347