Spectral reflectance characterization in Eucalyptus grandis Hill ex Maiden

Abstract

The objective was to characterize the levels of reflectance in leaves of Eucalyptus grandis Hill ex Maiden using spectral measurements from the location of leaves over the tree and the cardinal points. Were collected 400 samples of leaves, picked in the lower portion of the tree following the cardinal points on the trunk in FEPAGRO. We analyzed Four treatments with five replicates in five trees depending on their location in plot (north, south, east, west and central). It was concluded that the band 400 to 700nm, there were significant differences between treatments represented in the analysis of variance. The greatest difference in reflectance occurred between West-South and the lowest difference occurred between North and South. To the second band (700 to 1000nm), the analysis was significant between the values average reflectance. Found a significant difference between the average values of reflectance in the East-West positions. In contrast with a band, the band achieved two significant differences between average reflectance of heading east to west. It was observed that the reflectance followed the same trend for different treatments. Significant differences were observed between treatments corroborating difference related to the location of trees and views collection of leaves in relation to the cardinal points.