Biblioteca do Café
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1
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Item 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 LuizCoffee 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.Item Initial performance of coffee trees with different fertilizationand irrigation management(Universidade Federal de Lavras, 2022-06-09) Silva Júnior, José Geraldo da; Pin, Iago Parmanhani; Ferreira, Daniel Soares; Castanheira, Dalyse ToledoCoffee is one of the main agricultural commodities in the world. However, due to its sensitivity to water stress and changes in the availability of finite sources of nutrients and the constant search for a more sustainable agriculture, it is necessary to modulate the responses of plants to soil water and the real nutritional demand of the coffee tree. Thus, the objective of this work was to analyze the initial performance of arabica coffee grown with or without water restriction and with five different soil fertilization managements, in order to propose more techniques to optimize coffee production. The exper-iment was carried out in a greenhouse, in the experimental area of the Federal University of Viçosa, in the city of Viçosa-MG. The experimental design was completely randomized in a 2x5 factorial scheme, with two irrigation depths (40% and 80% of the available water in the soil) and five fertilization managements (conventional 100% of the recommended dose, controlled release of 80 and 100% of N and recommended K and organomineral 80 and 100% N and K of the recommended dose). In view of the observed results, it can be observed that water restriction in the initial period of coffee develop-ment provided a reduction in the variables of root and shoot growth of the plants, regardless of the soil fertilization management used. In environments with greater water restriction, no significant difference was observed between the studied fertilizers and in an environment without water restriction, the controlled release fertilizer 80% presented the highest global growth averages. Water management provided a greater effect on coffee nutrient dynamics than duly studied fertilization management.Item Efeito da irrigação em zona de transição na formação de grãos boia em variedades de cafeeiro arábica(Embrapa Café, 2019-10) Ferreira, Daniel Soares; Catem, Diogo de Souza Baltazar; Amaral, José Francisco Teixeira do; Tomaz, Marcelo Antonio; Ribeiro, Wilian Rodrigues; Ferreira, João Marcos Soares; Gonçalves, Morgana ScaramussaO Brasil tem destaque mundial quanto aos parâmetros produtivos da cafeicultura, tal destaque origina-se do desenvolvimento e escolha de variedades superiores conciliadas com tratos culturais e manejo adequado da lavoura. Neste sentido, objetivou-se com o referido estudo, analisar a influência da irrigação sobre a formação de grãos em variedades comerciais de cafeeiro arábica. O experimento foi desenvolvido em campo, em zona de transição pra o cultivo de cafeeiro arábica (640m de altitude) no distrito de Lagoa Seca, Interior do município de Alegre-ES, em designer experimental em parcelas subdividas com três variedades de cafeeiro arábica (Paraiso MG H419-1; Catuaí 144 CCF e Catucaí 2SL) nas parcelas e dois regimes hídricos (Irrigado e sequeiro) nas subparcelas, com quatro repetições. As variedades responderam de forma diferenciadas à característica grãos boia entre os regimes hídricos estudados, com destaque para a variedade Paraiso MG H419-1 para o ambiente sequeiro e Catuaí 2SL para o regime irrigado.