Avaliação da eficiência de polímeros hidrorretentores na sobrevivência de mudas de Eucalyptus em latossolo vermelho na região sudoeste do estado de São Paulo

Abstract

With the increase in the cost of implantation operations in the forestry area, there is an increasing need to incorporate new technologies that reduce the cost and increase the quality of plantations in their initial stage of development, guaranteeing lower mortality, greater homogeneity and stocking. Therefore, this study aims to evaluate the development and initial mortality of eucalyptus seedlings using hydroretentive polymers in an Oxisol in the southwest region of the state of São Paulo under conditions of a commercial plantation. The experiment was set up in a randomized block design (DBC) with 4 treatments, consisting of 4 replications of 20 seedlings each. In the experiment, soil moisture; Increase of the aerial part of the plant; increment of neck diameter; guarantee of planting survival; shoot dry mass and root system dry mass. The data obtained from the estimates were allowed to test for normality, using the Kolmogorov-Smirnov method, analysis of variance (ANOVA), and the Scott-Knott mean comparison test at 5% probability of error. Through the results obtained, it can be seen that there was a statistical difference for treatment 1, which obtained the highest mortality value 7.5% and the lowest soil moisture value 11.94%, close to the plant. As for the variables shoot height increment, collar diameter increment, shoot dry mass, root system dry mass and H/Dc ratio, there was no static difference between the four treatments.