Index of efficiency of macronutrients in tree species in a mixed araucaria forest/Paraná State

Abstract

The main objective of this research work was to study the Efficiency Index of Macronutrients in tree biomass in a Mixed Araucaria Forest through 20 primary sample plots of 12 m x 12 m. The efficiency indexes of macronutrients (EIMacronutrients) varied between the tree species, and between the biomass up ground components (stem = wood stem + bark; leaves and total = stem + branch + leaves). The species that showed hight EIMacronutrients to the stem production were the same that showed hight EIMacronutrients to the woody components production (stem + branches), excetp Myrsine ferruginea; Schinus terebinthifolius and Calyptranthes concinna.