Viabilidade econômica do cultivo de mamão fertirrigado sob diferentes doses de potássio

Abstract

Brazil has an outstanding performance in the national and international market of papaya production. To optimize this production, the use of technologies such as fertigation is necessary. However, understanding the economic viability of this technology is of paramount importance to stimulate its use. In this context, the objective of this study was to evaluate the economic viability of fertigated papaya under different doses of potassium. Fertigation was done by drip irrigation system, with drippers presenting a flow rate of 1.4 L h-1. The experiment was installed in Igarape-açú, in the northeast of Pará. The methodology used to assess the economic viability of fertigated cultivation of papaya is an adaptation of previous works. From the analysis performed, it was found that the use of fertigation through a drip irrigation system, applying a dose of 480 kg K2O ha-1, resulted in a cash flow with a net present value (NPV) of R$ 27,806.33, an internal rate of return (IRR) of 48.10%, and a benefit/cost ratio (B/C) of 2.01. Therefore, for one hectare of fertigated papaya with doses of potassium, under the observed edaphoclimatic conditions, the production with the adoption of the drip fertigation technology, it constitutes in a viable option.