Avaliação física e química do gongocomposto na qualidade fisiológica de mudas de Solanum lycopersicon

Abstract

Tree pruning in urban centers generates waste that can be used as organic compost in the production of Solanum lycopersicon seedlings with high productive potential, encouraging alternative management with the use of alternative substrates such as gongocomposting, which guarantees plant nutrition and protects the environment environment and reduces production costs, enabling increased profitsin agricultural activities. Therefore, the objective of the present work was to evaluate the behavior of gongocompost from the mixture with organic residues from tree pruning of Leucaena leucocephala, Mimosa caesalpinifolia and Prosopis juliflora, in the production of tomato seedlings. The experiment and analyzes will be carried out in the Biology and Microbiology Laboratory of the Senador Jessé Pinto Freire State School in Parazinho-RN. To obtain the substrates from the gongocomposting process, the following proportions will be established: 40% of grass clippings (Paspalum Notatum) + 30% of pruning residues from each of the tree species composed of leaves, leaflets and thin branches of species: Leucaena leucocephala, Mimosa caesalpinifolia and Prosopis juliflora, where the process lasted 120 days, placed in a covered warehouse for natural drying and crushed in knife mills. The substrates were evaluated for chemical properties: determination of C/N content and N, C, P, K, Ca and Mg content. And physical analyses: volumetric density, macro and microporosity, total porosity and water retention capacity of the substrates. At 24 days after sowing, the fresh and dry mass of the aerial part, fresh and dry mass of roots, root volume, seedling vigor and stability of the tomato clods were measured. The experimental design was completely randomized (DIC), with five treatments and five replications. For data analysis, the means were compared using the Tukey test (p ≤ 0.05). The gongocomposite made from ALG+SAB (40% grass + 30% mesquite + 30% sabiá) presented the best physical and chemical characteristics. And they provided the best initial development of Solanum lycopersicon seedlings.