Demanda hídrica do coqueiro com base na evapotranspiração de referência (ETo) e nos coeficientes de cultura (kc) e de redução da evapotranspiração (kr) no litoral paraibano.

Abstract

Water management of irrigated areas need to fit the programmed schedule to entirely supply water requirements on its different crop phenologycal development stages. It is possible to mention adopted proceedings of soil-crop-atmosphere system components: climatic, soil or plant measurements. Water economy of different irrigation systems begin with management optimization on agricultural parcel. The adoption of racional management contribute to water resources economy, energy and labor. The water amount to be applied depends on the climatic or atmospheric demand, phenologycal phases and efficiency application of the irrigation system to be used. On this paper methodology is applied by the use of reference evapotranspiration (ETo), the crop coefficient (kc) and reductions coefficient (kr), distinguished on seven development stages of Coconut crop as parameters to calculate water requirements. The objective of this paper is to show alternatives to save water on irrigated Coconut cultivation at any season, concluding that ETo and kc are very useful to calculate and manage irrigation programming schedule.