Navegando por Autor "Pereira, Reginaldo Sergio"

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Modeling and prediction of volume and aereal biomass of the tree vegetation in a Cerradão area of Central Brazil
(Interciencia, 2017-01) Rezende, Alba Valéria; Miguel, Eder Pereira; Pereira, Reginaldo Sergio; Azevedo, Gileno Brito de; Mota, Fabrícia Conceição Menez; Souza, Álvaro Nogueira de; Joaquim, Maísa Santos
This research aims to adjust and select models to quanti- fy the volume of the tree vegetation and its total and com- partmental biomass, in a ‘cerradão’ (forest savanna), in the municipality of Palmas, Tocantins, Brazil. A forestry invento- ry was performed in an area of 10.15ha, divided in sampling plots measuring 400m 2 , in which all living and dead standing trees ≥5cm DBH were sampled and identified, with a 20% er- ror margin. The trees were cubed using the Smalian meth- od and 84 of them were weighted. After obtaining the green mass by compartment, samples were removed in order to es- timate the dry biomass. Mathematical models were adjusted to estimate total volume/biomass per unit area as well as by compartment. The Schumacher and Hall model was chosen. After processing, the inventory error was within the admissi- ble margin. Volume and total stoked biomass by hectare were 126.71m3·ha -1 and 61.67Mg·ha -1 . For the bole and crown com- partments the values were 79.23 and 47.17m3·ha -1 for volume and 29.70 and 31.98Mg·ha -1 for biomass. Dead trees summed 6.70% of the volume and 7.00% of the biomass, while leaves contributed with 7.3% of the total biomass. Bark summed 11.50% of the volume and 21.00% of the biomass. Volume and biomass stocks on the studied biome, when compared to oth- ers types of ‘cerradões’, are higher than those found on sa- vannan formations.