Navegando por Autor "Pereira, Rodrigo Gomes"
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Item Caracterização e avaliação do chorume do resíduo da graviola (Annona muricata L.) na produção do milho verde(INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2025-07-08) Silva, Alisson Douglas da; Maia, Stoécio Malta Ferreira; http://lattes.cnpq.br/6110419050119583; Cavalcante, Marcelo; https://orcid.org/0000-0002-0722-0618; http://lattes.cnpq.br/0221717690546039; Pereira, Rodrigo Gomes; http://lattes.cnpq.br/5651953026655989; Brito, Klebson Santos; http://lattes.cnpq.br/4650092086179357Discarding and composting are the main alternatives that have been adopted for by products of fruit pulp production. However, leachate, a liquid residue rich in minerals and organic substances, generated in the decomposition process of organic matter, is discarded. It is possible to produce liquid biofertilizer from leachate with economic potential for generating employment and income. Therefore, this research aimed to evaluate the chemical composition of leachate from soursop residue and the effect of different concentrations on the production components of green corn. The study was carried out in two phases: 1) production of biofertilizer from composting and evaluation of the chemical composition; 2) evaluation of four concentrations of biofertilizer (0% - control, 5, 10, 15 and 20% of biofertilizer diluted in water), at field level, on green corn, in a randomized block design, with four replications. The chemical composition of soursop leachate showed high magnitude values for macro (N, P, K, Ca, Mg) and micronutrients (Mn, Cu, Fe, Zn), total organic matter (44,154 mg/L), total organic carbon (4,191.7 mg/L) and humic (10.77 mg/L) and fulvic acids (1,054.4 mg/L). When applied to corn crops, there was no effect (p>0.05) of the concentrations on the production components and chlorophyll content. The average height of the plants was less than 1.0 m and the early flowering (60 days after planting) may indicate the lack of adaptation of the cultivar to the research site, influencing the treatments applied.Item Produção de biofertilizantes a partir do resíduo da graviola (Annona muricataL .): uma opção sustentável ao descarte de resíduos para agroindústrias de polpa de frutas(INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2025-07-08) Silva, Alisson Douglas da; Cavalcante, Marcelo; Maia, Stoécio Malta Ferreira; Dantas, Adrielly Cabral; Pereira, Rodrigo Gomes; Brito, Kleber SantosNenhumItem Viabilidade técnica do uso de topsoil na composição de susbstratos de espécies florestais da caatinga(2023-07-30) Andrade, Adriano Alves de; Cavalcante, Marcelo; http://lattes.cnpq.br/0221717690546039; Santos, Cicero Gomes dos; http://lattes.cnpq.br/1756791175395693; Pereira, Rodrigo Gomes; http://lattes.cnpq.br/5651953026655989Mining is one of the basic sectors of the country's economy. However, it generates large environmental impacts, as well as a large amount of waste. To comply with environmental legislation, the enterprise must present programs for the recovery of degraded areas. The production of seedlings is one of the actions performed, which requires a large volume of substrates, usually commercial, of high cost. The topsoil, the surface layer of the soil, is a residue with physicochemical characteristics with potential for agricultural use, present in large quantities, reaching 33 thousand m3. Therefore, the objective of this research was to know the technical feasibility of topsoil added to commercial substrate for the production of seedlings of four native species of the Caatinga. The experiment was completely randomized in a 5 x 4 factorial scheme, with five levels of topsoil (0, 25, 50, 75 and 100% of topsoil replacing the commercial substrate) and four species of Caatinga timbaúba (Enterolobium contorstisiliquum), canafístula (Peltophorum dubium), dry flour (Abarema langsdorfii) and white ipê (Tabebuia roseo-alba). Biometric variables were evaluated to determine the quality of the seedling. Considering the number of leaves, there was no interaction between the factors, in which the species timbaúba (8.0) and ipê branco (8.5) had higher averages, being able to use 100% topsoil. For the diameter of the stem, 13.9 and 10.3% topsoil are the maximum limits for canafistula and dry flour. For the height of the plant, 85.4% topsoil is recommended for Timbaúba. Considering the Dickson quality index, for the canafístula and ipê branco species, 74.1 and 36.1% are the maximum limits of topsoil and, for dry flour and timbaúba, up to 100% can be used. Thus, it will be possible to reduce costs up to 77% in the production of forest seedlings.