Silício e aminoácidos no crescimento de mudas de cafeeiro arábica e na redução populacional de Meloidogyne exigua

• Ano de defesa: 2024
• Autor(a) principal: Fornaciari, Gabriel
• Orientador(a): Tomaz, Marcelo Antonio
• Banca de defesa: Souza, Gustavo Soares de , Alves, Fábio Ramos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; Mestrado em Agronomia
• Programa de Pós-Graduação: Programa de Pós-Graduação em Agronomia
• Departamento: Centro de Ciências Agrárias e Engenharias
• País: BR
• Palavras-chave em Português: Fitonematoides; Silício; Aminoácidos; Phytonematodes; Silicon; Amino acids
• Área do conhecimento CNPq: Agronomia
• Link de acesso: http://repositorio.ufes.br/handle/10/20765

Studies show that the supply of silicon and amino acids increases the resistance of plants to attack by phytopathogens, water deficit, salinity, in addition to improving nutritional status and some vegetative and physiological aspects due to greater photosynthetic efficiency. In this sense, the objective was to evaluate the effect of jointly supplying silicon and amino acids on the vegetative growth of arabica coffee seedlings and on the population reduction of Meloidogyne exigua. For this, an experiment was carried out testing five doses of a mixture of silicon (sodium silicate) and amino acids (0,0; 0,288; 0,575; 0,863 and 1,150 g plant-1). The experiment was conducted in a completely randomized design, where each experimental unit consisted of a 5 liter pot filled with soil and cultivated with an arabica coffee seedling of the Catuai Amarelo IAC 62 variety. The plants were inoculated with 6000 nematodes (eggs and juveniles of second stage) and were carried out for 120 days, when assessments were carried out related to vegetative development, leaf pigments, nutrient content in tissues and the population of nematodes present in the root system. The collected data was subjected to analysis of variance and subsequently the doses of silicon and amino acids were tested using regression models. The vegetative development of plants, leaf chlorophyll content and nitrogen and potassium content were negatively affected by the sodium ionic toxicity present in the silicate source. On the other hand, the final population of M. exigua in the coffee root system was significantly reduced. The number of galls had a total reduction of 52.7%, while the final population showed a reduction of 55.6%, at the maximum dose, when compared to the control