ESTOQUE INDIVIDUAL DE BIOMASSA E CARBONO EM Nectandra grandiflora Nees (CANELA-AMARELA)

Reforestation was taken into consideration in the Kyoto Protocol, but there are few studies on Brazilian native species. This paper aimed at quantifying the carbon stocked by Nectandra grandiflora Nees, through the analysis of its carbon fraction and dry biomass weight. The data came from 30 trees harvested in Sao Joao do Triunfo municipality (PR). Each tree separated into four components: foliage, branches, trunk and roots. The material was submitted to lab procedures, i.e., drying, weighting, triturating, grinding and carbon determination. Analyses were carried out and an individual tree carbon stock model as a function of dbh was developed. The mean carbon fraction was: 44.1% for foliage, 42.7% for branches, 42.4% for roots and 42.1% for the trunk, and the weighted average was 42.3%, lesser than the IPCC default. Foliage showed carbon fractions significantly greater than the other biomass components analyzed. The distribution of dry biomass in the studied species was mostly in the trunk, and afterwards in the branches, roots and, finally, foliage. It was concluded that the equation PCTotal = exp [-2.26388 + 2.38201 x Ln (dap)] x 0.42334 represents adequately the behavior of the carbon stock in the species studied