Avaliação de doses de penergetic em eucalipto no sudoeste do Paraná

Abstract

Forest plantations play an increasingly important role in satisfying global demand for wood, and eucalyptus plantations in particular, as they are booming. However, the high productivity of commercial eucalyptus plantations in Brazil largely depends on fertilizer applications. Therefore, there is a need to investigate strategies to increase the efficiency of fertilizers, with the use of soil and plant biostimulators being an option. Within this context, the objective of this work was to evaluate the effect of different concentrations of the soil bioactivator Penergetic®-Kompost (K) and the plant Penergetic®-Pflanzen (P) in a eucalyptus stand in the southwest region of Paraná. Penergetic was applied at the time of planting the seedlings in different doses. After 36 months, the forest inventory was carried out and the analysis of leaf nutrients was carried out. In addition to measuring 20% of the height of the sampling unit, and 100% of the DBH, the cubage was carried out to estimate the volume. There was a significant correlation for dendrometric variables (dap x height) and for volume x dap and height x potassium. For the correlation between nutrients, the significant effect occurred between N x P, Nx Mg for the macronutrients, and for the micronutrients B x Cu, Cu x Zn, Fe x Mn, Fe x Al, Al x Mn, and B x Mn. For the other nutrients, there was no significant correlation. There was a significant effect for height with the use of Penergetic. Diameter and volume did not show the same response. For the evaluated nutrients, only potassium showed a significant difference, while for the micronutrients there was no response regarding the evaluated statistics.The application of Penergetic did not influence the development of Eucalyptus for the DBH variable, however there was little significant difference for height, indicating the need for further studies. The concentrations of macronutrients and micronutrients in the leaves were within the normal range for the species of the genus and, in some cases, above the upper limit of the normal range, not limiting the growth of trees. The application of Penergetic technology did not increase the volume of wood produced, and further studies are needed to understand the effectiveness of the product in planted eucalyptus forests. The significant correlations found showed the existence of nutrients available in the soil, however, with little response on dendrometric variables. The negative correlations found may have a direct relationship with the application of Penergetic, where only one application may not have had the positive effect.Keywords:Eucalyptusspp.Biostimulant. Fertilization.