Analyze Microdensitometric for the Annual Rings of the Wood of Thuja of the Maghreb Tetraclinis Articulata in Relation with some Ecological Factors PDF

Keywords

Algeria, Tiaret Forest, Tuja, wood, Microdensitometric, Ecological factors.

Abstract

The goal of this work is to study the microdensitometric properties of Thuja of the Maghreb, in a forest area located at the West of Algeria, by the microdensitometric method. The results obtained, by analyzing 1029 annual rings. confirm the influence of ecological factors on the density of wood via their action on the anatomical composition of late wood in the annual ring. Moreover, the factorial analysis showed that high altitude, location with soil rich in limestone and under semi-arid climate had the best intrinsic quality of wood. With these ecological conditions, the average density of the annual rings increases and early wood decreases. The classes of the microdensitometric profiles of this location are characterized by a zone of well developed late wood which contains a significant number of tracheas responsible for the higher density compared to other locations. In this case, selection of provenances should be based on selecting the individual trees having faster growth and higher wood density than the average of the stand in its natural habitat.