%0 Article
%T Crown structure and stem growth of Norway spruce undergrowth under varying shading.
%A Greis, Ilppo
%A Kellomäki, Seppo
%D 1981
%J Silva Fennica
%V 15
%N 3
%R doi:10.14214/sf.a15066
%U https://silvafennica.fi/article/5125
%X <p>The crown structure and stem growth of Norway spruce (<em>Picea abies</em> (L.) H. Karst.) undergrowth was studied in relation to the prevailing light conditions and potential photosynthesis. Shading decreased the stem height growth more than the length increment of laterals, producing a plate-shaped crown in deep shade. Needles responded to shading by adopting a horizontal inclination in deep shade. The needles were wide and thin respectively in shade. In the open the needle cross-section was almost square. Stem radial growth and height growth were both affected by shading exhibiting a linear response to the prevailing light conditions and the potential photosynthesis. Light conditions under dominating trees were closely correlated with the basal area of the dominating trees.</p>
<p>The PDF includes a summary in Finnish.</p>