Navegando por Autor "Braun, Heder"

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Primeira aproximação para solo cultivado com cafeeiro conilon na região atlântica da Bahia
(Editora UFLA, 2017-07) Cavalcanti, André Cayô; Oliveira, Marcos Góes de; Covre, André Monzoli; Gontijo, Ivoney; Braun, Heder; Partelli, Fábio Luiz
O Sistema Integrado de Diagnose e Recomendação (DRIS), apesar de ser comumente utilizado na interpretação de análises foliares, pode ser empregado em análise química de solo, existindo potencial do uso da metodologia em solos cultivados com cafeeiros. Objetivou-se estabelecer faixas de suficiência e normas DRIS para solos cultivados com cafeeiro conilon na região Atlântica do Estado da Bahia. Coletaram-se 24 amostras de solo em 2012 e 2013, na profundidade de 0-20 cm, sendo quantificados os teores de matéria orgânica, Ca, Mg, K, P, S, Zn, B, Cu, Fe, Mn, saturação de bases e capacidade de troca catiônica a pH 7. Estabeleceram-se normas DRIS e faixas de suficiência para os nutrientes do solo, a partir de lavouras com produtividade, igual e superior a 100 sacas beneficiadas ha -1 de café conilon, sendo aplicáveis na recomendação de adubação da cultura na região. A maioria dos parâmetros estabelecidos apresentou discrepância em relação ao referencial teórico que se tem atualmente para o café conilon. Os resultados sugerem o desenvolvimento de normas regionais e específicas para a aplicação do método DRIS e faixas de suficiência no solo, para lavouras de café conilon.
Spatial distribution of the root system of Conilon and Arabica coffee plants
(Empresa Brasileira de Pesquisa Agropecuária - Embrapa, 2020) Partelli, Fabio Luiz; Cavalcanti, André Cayô; Menegardo, Camilo; Covre, André Monzoli; Gontijo, Ivoney; Braun, Heder
The objective of this work was to evaluate the root system of Conilon coffee (Coffea canephora) and Arabica coffee (Coffea arabica) plants in the soil profile, using semivariograms. The evaluations were carried out in an area located in the municipality of Jaguaré, in the state of Espírito Santo, Brazil. The Verdebrás G30/G35 Conilon coffee and the Catuaí Vermelho IAC 44 Arabica coffee cultivars were assessed. Soil monoliths with coffee plant roots were collected at three distances from the trunk in the planting row and at six distances from the trunk between rows, at six depths. The roots were collected and washed and then digitized and processed in the Safira software. The spatial variability of the evaluated attributes was characterized by the geostatistical technique, through semivariograms, using the GS+ 7.0 software. Root surface area, length, and volume were quantified for the two coffee species. Conilon coffee plants have a tendency of showing a root system with a smaller surface area, shorter length, and lower volume by volume of soil, as well as a less discrepant distribution on soil surface and in deeper layers, compared with Arabica coffee.
Vegetative growth of Conilon coffee plants under two water conditions in the Atlantic region of Bahia State, Brazil
(Editora da Universidade Estadual de Maringá - EDUEM, 2016-10) Covre, André Monzoli; Partelli, Fábio Luiz; Bonomo, Robson; Braun, Heder; Ronchi, Cláudio Pagotto
Extreme temperatures and persistent water stress stand out among the main factors that restrict the vegetative growth and productivity of Coffea canephora. The objective of this study was to evaluate the vegetative growth of orthotropic and plagiotropic branches of C. canephora under non-irrigated and irrigated conditions, and their correlation with climatic factors in the Atlantic region of Bahia State, Brazil. The experiment was established with two treatments (non-irrigated and irrigated) in a completely random design with 14 replicates. One orthotropic and four plagiotropic branches were labelled on each plant. During the two-year experimental period, the growth of these branches was evaluated at 14-day intervals. Two harvests were performed to obtain productivity data. In summary, it was confirmed that irrigation resulted in an increased productivity of Conilon coffee in the Atlantic region of Bahia, Brazil. The growth rate of the orthotropic and plagiotropic branches was higher in irrigated plants. The growth rate of the plagiotropic branches was limited by the fruit load capacity. The growth rate of C. canephora branches was not limited by the minimum average air temperature in the Atlantic region of Bahia, Brazil.