Wood Colour Variations of Quercus Species in Romania

Wood colour metrics are increasingly being used in wood technology and ecology studies. Researchers usually determine the colours of after treatment or different habitats. There is very little research dedicated to problem variations among one specific species harvested forests regions. The main purpose current reveal estimate variability oak species. For this study, a total 89 samples were taken from heartwood seven (Quercus robur L., Quercus cerris rubra pedunculiflora K. Koch., pubescens Willd., petraea (Matt.) Liebl., palustris Muenchh.). CIELAB system was for assessment differences. To groups variations, K-means clustering used. results show that do exist. According cluster analysis, at least five types can be distinguished (because some clusters, few present) investigated forests. differences mainly observed terms lightness (L*) yellowness (b*). Redness not feature by which differs, but brighter more yellow samples. density Romanian oaks sample does influence coordinates. only coordinate affected a*, with small probability.