Aspectos produtivos do mamoeiro submetido a diferentes doses de nitrato de potássio via fertirrigação.

Abstract

The main goal of this work was to study the effect of application of the increasing quantity of potassium fertilization. The fertilization used was the potassium chloride. Crop studied was papaya, group Formosa, variety Tainung Nº 1. Study was carried in the located at the Distrito de Irrigação Jaguaribe Apodi (DIJA), Ceará, Brazil. It was applied four differents quantity of potassium nitrate (69, 137, 172 and 206 kg KNO3 ha-1 month-1). This quantity corresponded to 50, 100, 125 and 150% of the recommended through soil analyzed. Analyzed tributes were: productivity of fruit and total levels soluble solids in the fruit. Results showed that great quantity of potassium nitrate increased the productivity of fruit and increased the total levels soluble solids in the fruit, too. However, this occurred until a certain point and it decreased.