Conteúdo foliar de zinco, produção, qualidade de grãos e plasticidade foliar do cafeeiro em resposta ao suprimento do nutriente

• Ano de defesa: 2009
• Autor(a) principal: Neves, Yonara Poltronieri
• Orientador(a): Martinez, Hermínia Emília Prieto
• Banca de defesa: Sacramento, Luis Vitor Silva do , Santos, Ricardo Henrique Silva , Neves, Júlio César Lima
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Coffea arabica; Micronutriente; Inserção no caule; Anatomia vegetal
• Palavras-chave em Inglês: Coffea arabica; Micronutrient; Insertion in the stem; Plant anatomy
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/1118

This study was carried out to investigate the feasibility of zinc supplementation by insertion of tablets in the orthotropic branch of Coffea arabica L., verify the response of coffee tree in terms of productivity and quality of grain, evaluate the effect of doses and way of Zn supply on it and study the effect of Zn in leaf anatomical plasticity of coffee trees. To evaluate the Zn leaf content were installed two experiments in the Universidade Federal de Viçosa. Experiment 1 was conducted in the area of research called "Agronomia Vale", from October 2003 to June 2005. The experimental design was a factorial 3x4, being three forms of Zn supply (T0-control, without Zn; T1-foliar application of ZnSO4 at 0,4%, T2-combination of salts 1 - containing 1,80g of zinc salts) and four cultivars of Coffea arabica L. (Acaiá IAC-474-19, Icatu Amarelo IAC-3282, Rubi MG-1192 and Catuaí Vermelho IAC-99). Experiment 2 was installed in November 2006 and accomplished until February 2009, on area of research called "Agronomia Aeroporto". In this was studied the following treatments: T0 - control, without Zn supply; T1 - ZnSO4 foliar spraying at 0,4%, T2 - combination of salts 1 (tablets containing 1,8g of salts of Zn), T3 - combination of salt 2 (tablets containing 0,5g of salts of Zn), T4 - combination of salt 2 (tablets containing 1,0g of salts of Zn), T5 - combination of salt 2 (tablets containing 3,0g of zinc salts). Combinations of salts in both experiments were provided in the form of tablets inserted in the orthotropic branch of coffee trees at 10 cm of the soil surface. In experiment 2 were also evaluated for grain yield, grain quality and the effect of Zn in the leaf plasticity. The supply of Zn in both forms, foliar spray and tablets inserted in the trunk, increased Zn leaf content. However, the tablets had the nutrient supply more regular than the foliar spray. The production and quality coffee grain, characterized by its size, percentage of Coffee Berry Borer, electric conductivity and leached potassium were also higher in treatment with Zn supply, regardless of the form of supply. Both combinations of salts had similar behavior, and the dose applied was determining to obtain the higher Zn leaf content and higher coffee yield. The supply of Zn affected leaf anatomy that under Zn deficiency increased the thickness of the leaf, the mesophyll and the spongy parenchyma. The supply of Zn by the insertion of tablets in the trunk of coffee trees proved to be a promising way to supply this element.