| dc.description.abstract | This study had as objective to analyze the growth of thickness of growth rings of trees of
Araucaria angustifolia, present in Tapera city, Rio Grande do Sul. In this study, it was used
44 Araucaria angustifolia samples, analyzed in the past six decades, to find an equation,
using regression models that describe the development of the growth rings of trees. Thus, it
was done a descriptive analysis of the collected measurements (thickness of the rings), for the
eleven trees, per a decade, considering the period from 1950 to 2009, presenting the average
values, median, minimum, maximum, standard deviation and coefficient of variation, to
characterize the analyzed sample. After, it was performed a regression analysis, for five years,
in which it was searched, among the various types of models available that one that best
estimated the thickness of the average tree ring analyzed. The best model which fit to the data
was the Compound, which was not found available material that detailed this type of found
model. This way, it was considered that the thickness of the full rings (beginning logs and end
of season) the growth rings to each of the eleven samples of trees, which ones have grown and
declined over the past decades. This variation can be explained by environmental factors that
acted in this five-year period and resulted in the formation of the thickness of the rings. | |
