%0 Journal Article
%T Soil water potential during different phenological phases of coffee irrigated by center pivot Potencial de ¨¢gua no solo em diferentes est¨¢dios fenol¨®gicos do cafeeiro irrigado por piv  central
%A Ad£¿o W. P. Evangelista
%A Luiz A. Lima
%A Ant£¿nio C. da Silva
%A Carla de P. Martins
%J Engenharia Agr¨ªcola
%D 2013
%I Sociedade Brasileira de Engenharia Agr¨ªcola
%X Irrigation management can be established, considering the soil water potential, as the limiting factor for plant growth, assuming the soil water content between the field capacity and the permanent wilting point as available water for crops. Thus, the aim of this study was to establish the soil water potential interval during four different phenological phases of coffee irrigated by center pivot. The experiment was set at the experimental area of the Engineering Department at the Federal University of Lavras, in Brazil. The coffee variety planted is designated as Rubi, planted 0.8 meters apart, with rows spaced 3.5 meters apart. The treatments corresponded to the water depths applied based on different percentages of Kc and reference evapotranspiration (ET0) values. Sensors were used to measure the soil water potential interval, installed 25 centimeters depth. In order to compare the results, it was considered as the best matric potential the one that was balanced with the soil water content that resulted in the largest coffee productivity. Based on the obtained results, we verified that in the phases of fruit expansion and ripening, the best results were obtained, before the irrigations, when the soil water potential values reached -35 and -38 kPa, respectively. And in the flowering, small green and fruit expansion phases, when the values reached -31 and -32 kPa, respectively. O manejo de irriga  o pode ser estabelecido considerando-se o potencial de ¨¢gua no solo, como fator limitante para o crescimento das plantas, assumindo o teor de ¨¢gua no solo entre a capacidade de campo e o ponto de murcha permanente, como ¨¢gua dispon¨ªvel para as culturas. Assim, o objetivo deste trabalho foi estabelecer o intervalo de potencial matricial de ¨¢gua no solo para o manejo de irriga  o, em quatro est¨¢dios fenol¨®gicos do cafeeiro irrigado por piv  central. O experimento foi desenvolvido na ¨¢rea experimental do Departamento de Engenharia, na Universidade Federal de Lavras. A variedade de cafeeiro cultivado foi a "Rubi", plantada no espa amento de 3,5 x 0,80 m. Os tratamentos corresponderam a laminas de ¨¢gua aplicadas em fun  o de percentagens de valores de Kc e da evapotranspira  o de refer¨ºncia (ET0). Para a obten  o do intervalo de potencial matricial de ¨¢gua no solo, foram instalados sensores de umidade tipo watermark, na profundidade de 0,25 m. Para a compara  o dos resultados, considerou-se como melhor intervalo de potencial matricial, aquele em equil¨ªbrio com o teor de ¨¢gua no solo, que resultou em maior produtividade da cultura. Com base nos resultados, verificou
%K cafeicultura irrigada
%K ¨¢gua dispon¨ªvel
%K Coffea arabica L
%K irrigated coffee
%K available water
%K Coffea arabica L
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200006