Desempenho e viabilidade econômica da couve-flor em diferentes condições de manejo da irrigação e adubação com boro no Nordeste Paraense.

Abstract

Due to shortage of technical and economic information of irrigated cauliflower in Northeast Pará, was installed an experiment with the hybrid desert in experimental farm of the Federal Rural University of Amazonia-UFRA, in the municipality of Igarapé-Açu / Northeast Pará, with the purpose of providing knowledge of water tension in society on the ground in which to start the drip irrigation and boron dose that should be applied to ensure maximum crop yield, and yet what the cost and profit of this production. The experimental design was a randomized block in a factorial 4 x 4, sixteen treatments with three replications. The treatments consisted of four water tensions on the ground (15, 30, 45 and 60 kPa) as indicating the time to irrigate and four boron doses (0, 2, 4 and 6 kg ha). Irrigation was performed with drippers and irrigation inônhacmea with tensiometers. Plots, 4 m”, consisted of 8 plants located in the spacing of 1.0 m between lines and 0.5 m between plants. The hybrid is promising for cultivation in soil and climatic conditions of the region in which it was assessed, with productivity of 17.1 t ha”, MFC 0.85 kg plant", DC 18 cm within the national average, in 38 kPa tension. The optimal dose of boron which ensured greater dry matter yield was 3 kg ha . Production costs were similar among the treatments, but the tension 38 kPa tends to provide higher profitability due to higher productivity.