Eficácia da torta de filtro na produção de mudas de espécies florestais

Abstract

Since the beginning of civilization, soil, air and water resources are used as a natural way to dispose waste from human activities. The increase in the production of such waste in recent years has caused increased concern for everyone engaged in any productive activity or process. The objective of this project was to evaluate the use of filter cake as a substrate component for formation of seedlings of Cedrella fissilis Vell and Lafoensia pacari A. St.-Hil. The filter cake from sugar cane agro-industry is a byproduct of sugar and alcohol that can be used as fertilizer. It is rich in P, providing better conditions for seed germination. The experiment was conducted in a greenhouse belonging to Passos Higher Education Foundation - Passos, MG. A completely randomized 4x2 factorial scheme was used with three replications. Each experimental unit consisted of six tubes containing a seedling per pot. The treatments were formed by the combination of four levels of filter cake: T1 - 60% Filter Cake + 40% soil T2 - 70% Filter Cake + 30% soil; T3 - 80% + Filter Cake 20% soil, and T4 - 90% Filter Cake + 10% soil, and two forest species, E1 Dedaleiro (Lafoensia pacari A. St. Hil) E2 Cedar (Cedrella fissilis Vell ). A hundred days after sowing, all specimens were collected for proper evaluation. . The proportions of filter cake and soil used in the preparation of the substrate were defined based on volume of these components, and the soil used was the top layer of a clay texture latosol. Based on the development of the work, we conclude that for the formation of Cedar and Dedaleiro seedlings, the percentage of filter cake on the substrate did not favor the formation of the seedlings and that doses higher than 60% filter cake and 40% v/v soil are not indicated for the production of seedlings of these species.