Crescimento e produção do tomateiro em diferentes substratos e doses de ácidos orgânicos, em estufa

• Ano de defesa: 2008
• Autor(a) principal: Rodrigues, Leandro
• Orientador(a): Alvarenga, Marco Antônio Rezende
• Banca de defesa: Gomes, Luiz Antônio Augusto, Faquin, Valdemar, Custódio, Telde Natel
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UNIVERSIDADE FEDERAL DE LAVRAS
• Programa de Pós-Graduação: DAG - Departamento de Agricultura
• País: BRASIL
• Palavras-chave em Português: Fertirrigação; Solanácea; Ácidos húmicos; Fibra de coco; Lycopersicon esculentum
• Área do conhecimento CNPq: CNPQ_NÃO_INFORMADO
• Link de acesso: https://repositorio.ufla.br/handle/1/4016

Tomatoes production in protected environment, with the use of substrates, has been growing among farmers, as it propitiates better market and cultivation conditions. On the other hand, the cultivation of tomatoes on soils has been causing problems, such as salinization and root system diseases. An alternative would be the production of tomatoes in containers with substrates, together with the use of organic acid by fertirrigation. This work had the objective to evaluate the effects of four substrates (S1: coconut fiber; S2: 2/3 coconut fiber and 1/3 carbonized coffee bark; S3: 1/3 coconut fiber and 2/3 carbonized coffeee bark), as well as the effects of four doses of organic acid (Codahumus product at 0, 20, 40, 80, L.ha-1), on the production of tomatoes in protected environment. Evaluations of plants´ height and stem´s diameter at 21 and 61 days after the transplant (DAT) were performed, as well as determinations of chlorophyll contents at 40 DAT, and quantifications of fruit production, number of fruits, and fruits and shoots dry matter. Significant interaction was not observed among the studied variables. The S1 substratum (coconut fiber) presented the best results regarding the plant´s height and stem´s diameter. The 80 L.ha-1 rate of Codahumus provided a greater chlorophyll content. The coconut fiber substratum presented the best results regarding the variables fruits production and number of fruits per plant, whereas the increase in the proportion of carbonized coffee bark in the substratum decreased the production and number of fruits per plant.