Anatomy and dendrometry of Mimosa artemisiana and Eucalyptus grandis

Abstract

The study was based on four areas from the inner part of circulate sample of stem towards the periphery. It was obtained of the diameter at breast height (DBH) of stem. The trees studied were 24 years old, including those that were part of the dendrometric inventory. The gravity density of the four areas in Mimosa artemisiana were as following: area 1 (0.66 g/cm³), area 2 (0.75), area 3 (0.90) and area 4 (0.90 g/cm³), whereas those of Eucalyptus grandis were: area 1 (0.64 g/cm3), area 2 (0.66), area 3 (0.83) and area 4 (0.86 g/cm³). Dry wood yields of M. artemisiana and E. grandis per hectare were approximately 944.492 tons and 836.741 tons respectively. Number of vessels per mm² in Mimosa artemisiana was: area 1, (7.7 vessels), area 2 (6), area 3 (4.2) and area 4 (3), and in Eucalyptus grandis was: area 1 (23), area 2 (8), area 3 (8) and area 4 (5 vessels). In M. artemisiana, the wall fraction of fibres was: area 1 (43.33%), area 2 (37.66%), area 3 (77.16%) and area 4 (78.29%) and E. grandis was: area 1 (66.66%), area 2 (73.33%) area 3 (73.75%) and area 4 (73.75%).