Fenologia do coqueiro irrigado em função de diferentes taxas de evapotranspirativas

Abstract

The coconut palm (Cocus nucifera L.), popularly known as the 'green dwarf coconut', is a monocot of the Arecaceae family with great economic importance. Fertigation, a technique in which fertilizers are applied via irrigation water, which favors a greater absorption of nutrients, with irrigation, an efficient technique for the full development of crops. This study aimed to evaluate the phenology of Cocus nucifera L under different evapotranspiration (ET0) rates. The experiment was conducted at Reunidas Sococo Farm in the city of Santa Izabel do Pará, PA. The randomized block design was adopted in a 3 x 9 factorial scheme (three ET0 rates, calculated by the Penman-Monteith method, with nine periods of analysis) and three blocks. The irrigation was performed by micro-sprinkler with a fixed irrigation scheduling. Three plants were selected from the useful plot, in which the following characteristics were evaluated: stipe length, collar circumference, and number of live and dead leaves. The phenological characteristics evaluated were directly influenced by evapotranspiration rates and climatic conditions, with the treatment with the replacement of 100% of the ET0 standing out positively, confirming that in stress situations, coconut does not present an adequate vegetative development coconut.