Desenvolvimento de mudas de Schizolobium amazonicum Huber ex Ducke sob diferentes volumes de recipientes e tipos de substratos

Abstract

The Paricá stand in the forest industry for it is rapid development and diversification in the use of wood, but needs research, especially the silvicultural and technological aspects. Thus, we aimed to evaluate the development of seedlings Schizolobium amazonicum Huber ex Ducke under different sizes of containers and substrates. The experimental design was completely randomized, subdivided over time, on a 4 x 3 factorial arrangement, being represented by four kinds of substrates (S1-25% of soil with 75% of cattle manure, S2-50% of soil with 50% of cattle manure, S3-75% of soil with 25% of cattle manure, S4-100% of soil) and three volumes of containers (R1-2997 cm3, R2-1070 cm3, R3-493 cm3) with four replications. The variables of crown diameter and seedling height were measured and the means were compared by Scott-Knott test. Modeling was performed to determine the height or diameter by reason of age, and container substrate by regression. The paricá showed rapid development and the results demonstrated higher values for height under conditions of high container and a lower percentage of cattle manure. The container substrate 1070 cm3 and 25% of cattle manure resulted in higher diameters. The modeling quantified the influence of seedling age and determined that after 28 days is possible to obtain seedlings of 30 cm, which may provide greater economic viability for developing seedlings Schizolobium amazonicum Huber ex Ducke.