EMISSORES DE IRRIGAÇÃO LOCALIZADA (MICROSPRAY E BAILARINA) NO CULTIVO DE AÇAÍ DE TERRA FIRME

Abstract

Pará State, Brazil, stands out in the açaí yield and is constantly expanding in the national and international market. The models of rotary micro-sprays vary according to the operating pressure, flow rate, and water application characteristics, such as precipitation, droplet size, number of nozzles, and water distribution pattern. Stationary micro-sprays do not have a rotational movement, but they work in a similar way to rotary ones. They have the advantage of being used in irregular areas with high flow rates and low acquisition costs. In this context, this paper aimed to evaluate micro-spray and ballerina type irrigation emitters in the dryland Açaí BRS crops, Pai d’Égua cultivar, in the Pará State, Brazil. The experiment was carried out at Sítio Boa Sorte, a rural property in the Paragominas Municipality, Pará State. A statistical design in randomized blocks was applied with four treatments with micro-spray brands and five replicates. The experiment had a total of 182 clumps and 546 plants. Biometric growth variables and the water application uniformity test were evaluated. There was no significant difference in the plant characteristics regarding the results of the treatments evaluated ballerina-type microsprinklers and microspray brands. The results of the distribution uniformity test (Coefficient of Uniformity of Distribution-CUD) for each treatment evaluated were good for the açaí crop. The use of microspray for the initial years of the açaí crop can be an alternative for providing water efficiently and at low acquisition cost.