Crescimento de Cariniana legalis (Mart.) Kuntze correlacionado a variáveis climáticas no município de Dois Vizinhos – Paraná

Abstract

The aim of this study was evaluate the growth of 6 individual trees of C. legalis, planted in the Arboreto of the Federal Technological University of Paraná, in Dois Vizinhos, PR, in response to variables of temperature and precipitation in the formation of growth rings. In addition to the growth response to these variables the statistical difference (α=5%) was evaluated between performing partial stem analysis with 1, 2 3 and 4 cores. Dendrochronological analyses were performed to verify the quality of the dates and the average sensitivity of the growth rings of the species. To estimate the mean annual increment (MAI), current annual incremente (CAI) and the growth curve to analysis, was used the Backman Modificado model, which provided a good fit to the observed growth datas.Thegrowth response to climatic variables was held by a Pearson linear correlation, and the comparison between the means of the increment rays by a Kruskal-Wallis test.The results showed that C. legalis has distinct growth rings, passive to partial trunk analyses, dendrochronology demonstrated an age of 39 years for the master series and an average sensitivity of 227. The MAI and the CAI, were quite satisfactory, in diameter and basal area, 1,462 and 1,393 cm/year of MAI and CAI, respectively, and 0.00327 and 0.00595 m²/year, demonstrating a good adaptation of the species in Dois Vizinhos, PR. Was possible to observe a good development of the trees sampled in Dois Vizinhos, which the growth of the species showed positive responses in months of greater precipitation and milder temperatures, was also possible conclude that it is not necessary to remove more than two cores per tree for dendrochronological analysis.