Crescimento de mudas de Eucalyptus grandis e Eremanthus erythropappus sob diferentes formulações de substrato

Abstract

The aim of this study was to evaluate the survival and growth of Eucalyptus grandis and Eremanthus erythropappus seedlings, besides analyzing the cost of the substrate produced according to the different formulas used. To this end, for each species, a completely randomized experimental design was carried out with ten substrate formulas containing cattle manure, carbonized rice husk, coconut fiber (at the proportions of 0, 30, 60 and 90%), and vermiculite (10%). At the end of the production process, the following variables were quantified: survival percentage, shoot height, and stem diameter of seedlings. Moreover, the cost to produce one m3 of each of the ten substrates analyzed was calculated. It was verified that the substrates significantly influenced the growth of both species: cattle manure negatively affected the growth of candeia seedlings and positively influenced the growth of eucalyptus seedlings. Increasing proportions of cattle manure reduced the cost per m3 of substrate.