Pirkko Ilonen , Pertti Hari, Markku Kanninen, Seppo Kellomäki

On distribution of growth in crown system of young Scots pine stands.

Ilonen P., Hari P., Kanninen M., Kellomäki S. (1979). On distribution of growth in crown system of young Scots pine stands. Silva Fennica vol. 13 no. 4 article id 5049. https://doi.org/10.14214/sf.a14906

Abstract

Branching and terminal growth of lateral shoots and needle growth of Scots pine (Pinus sylvestris L.) is investigated as a function of the whorl’s position and age and prevailing light climate. Number of buds per whorl was linearly and positively related to the whorl’s position and prevailing light climate. The growing whorl’s number counting from the apex was associated with declining bud number. The terminal growth of lateral shoots increased exponentially within the values 0.6–1.0 of the whorls position. Under these values the terminal growth was negligible. The growing whorl’s number indicated curvlinear decrease in shoot growth respectively, and only negligible growth occurred when the whorl’s age exceeded 10 years. The shoot growth was linearly related to the prevailing light climate but differences between dominating and dominated trees were apparent. The distribution of needle growth in the crown system was similar to that of shoot growth.

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Keywords
Pinus sylvestris; light; Scots pine; needle; branching; terminal growth

Published in 1979

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Available at https://doi.org/10.14214/sf.a14906 | Download PDF