Níveis de irrigação e doses de potássio na produtividade do maracujazeiro amarelo.

Abstract

The objective of this work was to evaluate the effect of irrigation levels and potassium rates applied through irrigation water by drip irrigation on the yellow passion fruit yield. The experiment was accomplished in the Experimental Field at Embrapa Meio-Norte, in Alvorada of Gurguéia – PI, Brazil. It was used experimental design of randomized block in plot subdivided with four replications. The treatments resulted from the combination among five irrigation levels (L1 = 0.25 EVA; L2 = 0.50 EVA; L3 = 0.75 EVA; L4 = 1.00 EVA and L4 = 1.25 EVA) in that, EVA is the Pan Class A evaporation and five potassium rates (K0 = 0.00, K1 = 0.225, K2 = 0.450, K3 = 0.675 e K4 = 0.90 kg plant-1 year-1). The passion fruit commercial yield was influenced (P<0.01) by potassium rates, irrigation levels and by interaction of those factories. Lower irrigation levels showed linear increase of the yield with the elevation of potassium rates. On the other hand, for highers irrigation levels, the obtention of values maximum required application of higher potassium rates