Vegetative growth of Conilon coffee plants under two water conditions in the Atlantic region of Bahia State, Brazil/Crescimento vegetativo de plantas de cafe Conilon sob dois regimes hidricos, na regiao Atlantica da Bahia, Brasil

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. Keywords: Coffea canephora, water deficit, temperature, plagiotropic branches. Temperaturas extremas e o deficit hidrico prolongado destacam-se como os fatores limitantes ao crescimento vegetativo e a produtividade de Coffea canephora. O objetivo foi avaliar o crescimento vegetativo de ramos ortotropicos e plagiotropicos de C. canephora em condicoes nao irrigadas e irrigadas, e relaciona-lo com os fatores climaticos, na regiao Atlantica da Bahia. O experimento foi instalado com dois tratamentos (nao irrigado e irrigado), no delineamento inteiramente casualizado, com 14 repeticoes. Marcou-se um ramo ortotropico e quatro ramos plagiotropicos em cada planta. O crescimento desses ramos foi avaliado em intervalos de 14 dias, durante dois anos. Foram realizadas duas colheitas para obtencao da produtividade. Em resumo, foi confirmado que a irrigacao resultou em aumento de produtividade de cafe Conilon na regiao Atlantica da Bahia. A taxa de crescimento dos ramos ortotropicos e plagiotropicos com carga pendente e superior nas plantas irrigadas. A taxa de crescimento de ramos plagiotropicos e limitada pela carga pendente. A taxa de crescimento dos ramos de C. canephora nao e limitada pela temperatura minima media do ar predominante na regiao Atlan