Determinação da densidade e volume de povoamentos de Eucalyptus grandis na região sudoeste do Paraná

Abstract

The present study aimed to determine the Eucalyptus grandis‟ density and volume using density as an indicator of the relative spacing index (% S), and indicate the form factors in shell and shelled settlements. Data for this study were collected in Eucalyptus grandis‟ forests of Eneas Marques and Salto do Lontra cities, with areas of 72.09 and 57.51 hectares respectively, belonging to the cooperative Florcoop, located in Francisco Beltrao, Paraná State. Respectively, both with seven and five years, and 3.0 x 2.0 meters of spacing, totaling 1666 trees per hectare. The relative spacing index founded was very low, so we can concluded that both populations need thinning to increase the average relative spacing of 7.92% for trees seven years old and 9.58% for trees five years old with relative space increasing of 16%, so the trees grew better, increasing the wood production. The average volume per hectare was low, which represents a low increasing of diameter, and heterogeneity of population, with many little trees. The mean form factor found for the population studied in the southwest region of Paraná was the same for both, and 0.447 to 0.457 barked trees and for trees without bark. The average percentage of forest bark of individuals studied was 22.4% for the population aged seven and 23.3% for the placement of five years.