Qualidade de mudas de mamão produzidas com substratos orgânicos e bactéria promotora do crescimento em plantas

Abstract

Papaya (Carica papaya L.) is the most cultivated species in the world. Brazil has been standing out as one of the main papaya producers, concentrating 31.6% of the world supply and the production of seedlings with high quality is essential. Seed, substrate and fertilizer are factors that can affect the production of good quality seedlings. Thus, the objective of this work was to evaluate the quality of papaya seedlings produced with organic substrates and plant growth-promoting bacteria. The experiment was conducted in a randomized block design with six treatments and four replications in a factorial scheme 6 (source of organic matter) x 2 (papaya genotypes), consisting of the following substrates for the genotypes of the soil group and the formosa group: Control (solo only); Biofertilizer + Soil (50% + 50%); Filter Cake + Soil (50% + 50%); Goat Manure + Soil (50% + 50%); Manure + Bovine (50% + 50%); Compound + Soil (50% + 50%). At 30, 60 and 90 days after sowing (DAS), growth parameters were analyzed: Plant Height, Number of Leaves and Stem Diameter. At 90 DAS the following parameters were determined: Fresh Pasta and Dry Pasta of Leaf, Root and Stem. Based on the evaluated parameters, the substrates that contained growth-promoting bacteria, bovine manure and goat manure showed promising results, being an alternative for the organic production of papaya seedlings. The seedlings produced in the treatments that contained only the soil (control) had the lowest averages in all the evaluated parameters.