Seppo Kellomäki , Pertti Hari, Pirkko Ilonen, Markku Kanninen

Eco-physiological studies on young Scots pine stands. II.

Kellomäki S., Hari P., Ilonen P., Kanninen M. (1980). Eco-physiological studies on young Scots pine stands. II. Silva Fennica vol. 14 no. 3 article id 5079. https://doi.org/10.14214/sf.a15020

Abstract

The technique of double normalizing, i.e. normalizing the relative needle biomass and the length of the living crown system, is applied to the modelling of the distribution of needle biomass in the canopy of young Scots pine (Pinus sylvestris L.) stands. The study based on the parameters of β-function shows that at the individual-tree level, the variance in needle distribution was not closely associated with any tree characteristics. A shift in the point of maximum needle biomass upwards unsuppressed trees was, however, evident. This was associated with an increase in the height of the trees. At the stand level, the stand mean height and stand density had an equal and a rather high potential for explaining the variance in the needle distribution. The normalized crowns are utilized in models for determining light extinction in the crown. A special technique for determining the amount of photosynthates available for growth in a particular tree is presented.

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Keywords
Pinus sylvestris; photosynthesis; Scots pine; stand density; needle biomass; crown class; needle distribution

Published in 1980

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Available at https://doi.org/10.14214/sf.a15020 | Download PDF