Ajuste de modelos y estimación de biomasa y carbono para Eucalyptus dunnii en la región sureste del Uruguay

The aim of this study was to estimate the total aboveground biomass and carbon (C) stock, using a series of relevant dendrometric variables (diameter at base height (DAB), diameter at breast height (DAP), crown diameter (DC), total and commercial height (HT y HC)), for a 10-year-old stand of Eucalyptus dunnii, on the 2.12 CONEAT soils group. The study was conducted in a forest farm named Mi Generala, located in the department of Florida, Uruguay (33° 47´ 52 S, 55º 29’ 00 W), which belongs to Agroempresa Forestal S.A. Ten plots were established that represented 2.57% of the total area of the stand and a traditional forest inventory was carried out considering 332 trees, distributed in five diameter classes. The variables DAB, DAP, DC and H were measured for these trees. Data analysis was performed using the R statistical software, in its Rstudio interface, by fitting generalized linear models. 33 individuals of the population were felled and cubed using the Smalian method and samples of five biomass fractions (leaves, fine branches, thick branches, bark and wood) were obtained for the determination of the moisture content and C in the laboratory. The biomass and C estimates in tons, considering the entire area of the stand (11,67 ha), were 3,518.57 and 1,442.78 Mg, respectively. It was found that the largest amount of biomass and C is present in the stem, followed by thick branches, leaves, and finally thin branches.