Pesquisa Agropecuária Brasileira
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Resultados da Pesquisa
Item Altitude on the physicochemical characteristics of coffee beverage from beans produced in Taquaritinga do Norte, in the state of Pernambuco, Brazil(Empresa Brasileira de Pesquisa Agropecuária - Embrapa, 2025-06-13) Santos, Wallysson Wagner Vilela; Silva, Gustavo Henrique Daniel Santos; Silva, Elisandra Rabêlo da; Silva, Mateus Bezerra de Lima e; Oliveira, Rodrigo Lira de; Silva, Suzana Pedroza daThe objective of this work was to determine the physicochemical characteristics of coffee beverages prepared with Coffea arabica beans produced at different altitudes in the municipality of Taquaritinga do Norte, in the state of Pernambuco, Brazil. Eight coffee bean samples, obtained from five different producers, were analyzed in a completely randomized design, with three replicates. The evaluated variables were: total acidity, pH, electrical conductivity, total dissolved solids, extraction percentage, reducing sugars, and caffeine content. The data were subjected to the analysis of variance, Tukey’s mean test, and agglomerative hierarchical clustering. The results showed total acidity from 0.39 to 3.05 mL-1 NaOH, pH from 5.30 to 4.80, electrical conductivity from 2.79 to 3.24 µS cm-1, total dissolved solids from 2.00 to 2.56 °Brix, extraction percentage from 18.14 to 27.24%, reducing sugars from 0.28 to 0.40%, and caffeine content from 0.50 to 2.18%. Through agglomerative hierarchical clustering, two groups of samples were discriminated based on the evaluated physicochemical parameters. Altitude is a common aspect of the samples of a same group, defining different characteristics of coffee beverages in Taquaritinga do Norte.Item Alternative substrates for the production of clonal Coffea canephora seedlings(Empresa Brasileira de Pesquisa Agropecuária - Embrapa, 2024) Balbino, Tony José; Espindula, Marcelo Curitiba; Tavella, Leonardo Barreto; Teixeira, Richelly Gisela Pasqualotto; Bravin, Núbia Pinto; Dias, Jairo Rafael Machado; Bravin, Maísa PintoThe objective of this work was to evaluate the physicochemical properties of coffee husk, elephant grass, and sugarcane alone or combined with each other or with commercial compounds, as well as their use as substrate for the production of clonal Coffea canephora seedlings. The experiment was carried out in two stages: one for the physicochemical characterization of the substrates, and the other for evaluations of the growth of coffee seedlings in these substrates. In the first stage, the treatments consisted of coffee husk (CH), elephant grass (EG), sugarcane (SC), commercial substrate (CS), vermiculite (VM), and their combinations. In the second stage, the standard substrate (soil) was also evaluated. CH presented a high electrical conductivity and density and a low aeration space and available water. SC stood out for its lower pH and density and its greater porosity. SC and EG were viable for coffee seedling production, not differing from the commercial and standard substrates. With the exception of CH+EG, CH+CS, and EG+SC, the combined substrates allowed of a greater seedling growth than the isolated ones. CH was only viable as a substrate when combined, especially with VM. Combining CH, SC, and EG to the standard substrate improves the quality of clonal C. canephora seedlings.