Determination of the basic density of cedro wood (Cedrela fissilis Vell.) along the stem

Alváro Felipe Valério, Luciano Farinha Watzlawick, Raul Silvestre, Henrique Soares Koehler

Abstract


The e objective of this work was to determine and compare the variation of basic density of the wood throughout the stem of Cedrela fissilis Vell., specie belonging to the Meliaceae family and known popularly as Cedro. The sample was performed in three selected trees at random in dense ombrophila forest, in the Municipal District of Apiuna and Presidente Nereu Ramos-SC. the e trees were knocked and they had its dendometric variables easured.
the e basic density was determined in samples 1,5 x 1,5 x 5 cm, taken from inside of the disc (cerne) and from the outside (alburno), being these collected next to chest (DAP),
0%, 10%, 50%, 75% and 95% from the point of morphologic inversion, above this, two samples with branches named G1 and G2 were collected. the e basic density was obtained through the relation between dry weight and fresh volume of samples and showing itself decreasing from the base to the top of the tree. In the analysis of variance (ANOVA) it
was verifi ed statistically signifi cant diff erences between the averages in densities along the trunk and the branches, the average basic density was 431.06 kg m-3. the e found uniformity of the basic density along the stem is a characteristic that gives the specie stability and security for its use in structural projects... However, it is needed deeper studies to improve its scientifi c fundaments on its physical and technological properties




DOI: https://doi.org/10.5777/paet.v1i1.5