EVALUATION OF THE RESPONSE OF PINUS TECUNUMANII IN RELATION TO FIVE TYPES OF SUBSTRATE

Abstract

This study was carried out with the aim of evaluating the response of Pinus tecunumanii under the influence of five types of substrates. The study was carried out in the central nursery of the company Florestas do Niassa, which is located in the province of Niassa. The experimental design was Completely Causalized Blocks (DBCC), with 5 treatments (substrates) and 4 replications. The total height of the seedlings was measured on a monthly basis, while the diameter of the seedling base, total biomass were measured at the end of the trial at 120 days. The collected data were submitted to the test of homogeneity of variance and normality of the residuals. The difference between the means of the variances was made to observe the difference between the means of the parameters evaluated by Tukey's test. There were significant differences in the variables analyzed corresponding to the respective substrates. The Dickson quality index was determined for the variables and the correlation analysis between the variables was performed, and the existence of positive correlations was found in most of the variables. The treatments with T1 (80% cocopeat + 20 fine sand) for Pinus tecunumanii, significantly influenced the growth of the seedlings under study, the treatment with T4 (60% cocopeat + 40% fine sand) presented low results in most of the parameters evaluated.