SUBSTRATOS E ADUBAÇÃO DE MUDAS GABIROBA

Abstract

The Cerrado is a Brazilian biome that has a great diversity of native fruit species. Among such species, the gabirobeira stands out, which is a sub-shrub that has fleshy fruits and is highly appreciated, especially in its fresh form. The quality of seedlings is essential for establishment in the field, requiring the use of suitable substrate with good availability of nutrients. Thus, trying to contribute to filling gaps, it was proposed to evaluate the effect of different doses of slow-release fertilizer and the influence of different substrates on the emergence and initial development of seedlings of gabiroba (Campomanesia adamantium O. Berg.). Two experiments were implemented. Experiment 1 consisted of three treatments, where, S0: coarse sand + soil (1:1); S1: manure + coarse sand + soil (1:1:1); S2: Commercial substrate. Experiment 2 consisted of six treatments with different doses of slow-release fertilizer, in which, A1: 2.5 g plant1; A2: 5 g plant-1; A3: 7.5 g plant-1; A4: 10 g plant-1; A5: 12.5 g plant-1. The different dosages of slow-release fertilizer were applied to the substrate: coarse sand + soil (1:1). Three seeds were sown in 30x12 cm polyethylene bags. The variables evaluated were emergence percentage, emergence speed index, seedling height, stem diameter, number of leaves, percentage of mortality, root length, shoot fresh mass, root fresh mass, total fresh mass, mass shoot dry mass, root dry mass, total dry mass and Dickson quality index (DQI). The quality of the gabiroba seedlings was influenced by the substrates and the doses of slow-release fertilizer. The slow-release fertilizer increased the biometric characteristics of gabiroba seedlings. For the production of gabiroba seedlings it is recommended to use the substrate coarse sand + soil (1:1) with the addition of 10 g plant-1 of slow-release fertilizer.