Aplicação de fertilizantes organominerais em mudas de maracujá

Abstract

Passion fruit is a crop widely distributed geographically and adapted to tropical climates. Seedling production is a crucial step for the implementation of the crop, directly affecting performance. Thus, the choice of substrate and fertilization are essential in the seedling production phase, to ensure quality, health, precocity, and cost of seedlings. Organomineral fertilizers can be a viable alternative to the use of mineral fertilizers in passion fruit culture. Currently, it is observed that organomineral sources promote great benefits as they are considered special fertilizers, which have macro and micronutrients, hormones, biostimulants, amino acids that promote improvements in growth. The objective was to evaluate the vegetative development of passion fruit seedlings, grown under increasing dosages of organomineral nutrition. The experiment was conducted in a greenhouse at the Federal University of Uberlândia (UFU), Monte Carmelo campus, using a completely randomized experimental design, in a double factorial scheme with additional treatment, (3x4)+1, in which different nutritional managements were tested at different concentrations. In the treatments, granulated organomineral fertilizer (FOG), liquid organomineral fertilizer (FOL), granulated organomineral fertilizer + liquid organomineral fertilizer (FOG +FOL) were used in increasing doses of concentration, as a control the standard commercial fertilizer and for the substrate the mixture of soil with commercial substrate (1:1) used in the region was used. Fourteen vegetative parameters were analyzed. The study was justified, as the management with the use of conventional fertilizers, differed from the other treatments, even with doses with a reduction of 70% of the fertilization recommendation, and due to the differences in the characteristics of the tested organominerals, their complementarity made their effect better than individual use. The best development of passion fruit seedlings occurred with the application of FOL+FOG doses with 120% of the recommended dose in the proportion of 1.80ml/seedling + 1.2g/seedling, at fortnightly intervals.