Abstract
The main objective of this study was to characterize the efficiency index of micronutrients in the tree species biomass in a Mixed Araucaria Forest through 20 primary sample plots of 12 m x 12 m. The efficiency index of micronutrients (EIM) between the tree species, like between the up ground biomass components (stem = wood stem + bark; leaves and total = stem + branch + leaves) varied. The species that showed hight EIM for the stem production were the same that show for the woody components production (stem + branches), except for Myrsine ferruginea; Schinus terebinthifolius and Calyptranthes concinna.
Key words:
Tree species; nutrients efficiency; Araucaria Forest