The effects of a natural gradient of light and competition on crown, shoot and needle morphology of naturally regenerated Norway
spruce (Picea abies) and silver fir (Abies alba) saplings, 0.8–0.2 m tall, were analyzed in a uneven-aged, managed stand in Comelico (eastern
Italian Alps). The results indicate that: (i) both crown, shoot and needle morphology are strongly affected by light, but in the examined
conditions (relative irradiance ranging from 2 to 32%) no significant effect of competition was observed, (ii) the ecological differences between
Norway spruce and silver fir saplings cannot be mainly attributable to differences in crown morphological traits, and (iii) the apical dominance
ratio (i.e., the length of the apical leader divided by the mean length of the lateral shoots at the last node) is a relatively good and simple indicator
of the light conditions in which saplings are growing. These informations may be useful in order to promote and assure effectively natural
regeneration.
GRASSI Giacomo;
GIANNINI Raffaello;
2006-02-14
E D P SCIENCES
JRC32423
https://publications.jrc.ec.europa.eu/repository/handle/JRC32423,
10.1051/forest:2005019,
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