Wood density and carbon content in young teak individuals from Pará, Brazil
In order to estimate carbon stock in natural or planted forests, it is necessary to determine wood density and carbon content. Thus, the aim of this study is to determine wood basic density and average carbon content in young Tectona grandis trees grown in commercial plantations in southeast Pará. Study subjects were between four and five years old. Samples, in the form of wood discs taken at 1.3 m height from soil, were separated into bark, heartwood, and sapwood, considering two types of genetic material: clones and seeds. Basic density varied, on average, from 0.46 g cm-3 in sapwood to 0.49 g cm-3 in heartwood, and no significant difference was observed between genetic materials. Average carbon content varied from 36% in the bark to 44% in the wood, and significant differences were found between averages of the two materials. There was no significant correlation between basic density and carbon content (r=0.3147). It was concluded that heartwood formation has early occurrence in teak, but there are no significant basic density differences between sapwood and heartwood. However, there are carbon content differences between wood and bark in the ages analyzed.