Determinação da densidade básica e das dimensões de fibras de um clone de eucalipto Urograndis plantado em dois locais no ano de 2007

Abstract

The physical and anatomical properties of wood can vary both between and within trees. Wood basic density and fiber dimensions can be influenced by both genetic and environmental factors. The objective of this work was to evaluate the basic density and fiber dimensions of a Eucalyptus urograndis clone at 9 years of age, planted in two different locations. The clone was provided by the Copener company, and collected from two locations whose soil and precipitation differ from one environment to another. Trees were felled and sampled at five levels of different heights: 0; 25; 50; 75 and 100% of commercial height. At each height, two disks were removed to determine the basic density and fiber dimensions. Mean volume values ​​with and without bark varied from one environment to another. For fiber dimensions, only the wall thickness showed a statistically significant difference at the 5% level. There was no statistically significant variation for the basic wood and bark density in the two locations. With the results obtained, it could be concluded that the environment influenced the thickness of the fiber wall, however, there was no interference of the same in the basic density of wood and bark.