Biblioteca do Café

URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1

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2015 - 201912020 - 20231

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Assunto: search.filters.subject.AIA

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    Effect of indole-3-acetic acid on growth, physiology and nutritional status of young arabica coffee plants
    (Universidade Federal de Lavras, 2023-01-20) Erlacher, Wellington Abeldt; Amaral, José Francisco Teixeira do; Amaral, José Augusto Teixeira do; Christo, Bruno Fardim; Ferreira, Daniel Soares; Tatagiba, Sandro Dan; Rocha, Brunno Cesar Pereira; Tomaz, Marcelo Antonio; Rodrigues, Wagner Nunes; Partelli, Fábio Luiz
    Coffee is one of the main agricultural commodities in the world. Thus, research aimed at reducing the productive risks of the crop has been increasingly encouraged, among which the use of plant hormones stands out. In addition, the objective of this work was to analyze the effect of the application of indole-3-acetic acid on the growth, nutrition and gas exchange of young Coffea arabica L plants. The experiment was carried out in the field in the city of Alegre, Espírito Santo, Brazil. The experimental design used was randomized blocks, testing the effect of the application of five doses of indole-3-acetic acid in young Arabica coffee plants, in four replications. The application of indole-3-acetic acid stimulates the growth rate of the stem diameter at a concentration of 60 mg L-1, as well as gas exchange in coffee plants, however it did not favor the increase in the substomatic concentration of CO2 instantaneous and intrinsic efficiency in water use and instantaneous carboxylation efficiency. Although the application of EIA was not able to provide direct gains in coffee growth during the experimental period, a longer evaluation of the treatments would possibly provide promising results for the coffee crop. The multivariate analysis showed that higher doses of auxin have a high relationship with the macronutrients studied.
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    Inibição da brotação de café com aplicação de ácido indolacético
    (Embrapa Café, 2015) Avila, Roniel Geraldo; Campos, Cleide Nascimento; Santos, Jacqueline Oliveira dos; Alvarenga, Amauri Alves de; Silva, Debora Valim da; Almeida, Lorena Gabriela
    O presente estudo teve o intuito de inibir a brotação de café recepado com a aplicação do regulador de crescimento ácido indolacético (AIA). Para tanto, plantas de café recepadas a pós a segunda desbrota receberam aplicação de diferentes concentrações de AIA, sendo elas, 0, 1, 3 e 5 g L-1. Após trinta dias da aplicação foi avaliado número de brotações, massa seca das brotações e comprimento de brotações. Observou-se que as concentrações de 1 e 3 g L-1 de AIA promoveram maiores reduções no número de brotações, matéria seca e comprimento de brotações, sendo observado um aumento nessas variáveis com a aplicação de 5g L-1de AIA.