Use of slow-release fertilizers in the production of Handroanthus impetiginosus seedlings

Abstract

The species Handroanthus impetiginosus has great economic interest due to the quality of its wood. Aiming to understand and expand the knowledge about the formation of seedlings with quality of the species, was study the efficiency and adequate doses of two slow-release fertilizers in the production of seedlings of Handroanthus impetiginosus. The experiment was carried out in a randomized block design, in a factorial (2x5). Two fertilizers (SRF1 and SRF2) were taken in five doses (0, 3, 6, 9, 12 kg dm^-³). Height, stem diameter, H/SD, shoot dry mass, root and total dry mass, and Dickson Quality Index were measured. For each variable, a maximum dose of technical efficiency (MDTE) was set. An analysis of variation and comparison of means was carried out using the Tukey test for the two fertilizers used and a regression analysis of the means for the doses used. All analyzes were evaluated using the R software. All variables showed positive quadratic growth. The results of the study indicate that both fertilizers are suitable for the production of seedlings of Handroanthus impetiginosus, in the MDTE of 11.65 kg dm^-3 for SRF1 and 9.19 kg dm^-3 for

SRF2.