Produção e qualidade de abobrinha sob diferentes doses e fontes de potássio

Abstract

The zucchini culture has been gaining importance in the Paraíba’s vegetables production scenario and responds to the use of mineral fertilizers. This study objective it was evaluate the influence of sources and doses of K2O on the zucchini ‘Caserta’ yield. The research was conducted at the Federal University of Paraíba, Areia, Brazil, in randomizedcomplete blocks design in a factorial scheme 6 x 2 with five doses of K2O (0 - 50 - 100 - 150 - 200 and 250 kg ha-1) and two sources (chloride and sulphate potassium) in four repetitions. The avarage fruits mass, fruit length, fruits by plant-1 number and total and commercial productivity were analyzed. The potassium chloride was efficient to increase the avarage fruit mass, fruit by number plant-1 and total productivity, while the 87.0 and 98.3 kg ha-1 of K2O doses in the chloride and sulphate potassium sources were responsible for the maximum commercial productivity of fruits, respectively, 23.5 and 24.0 t ha-1, higher than the national average productivity, 20.0 t ha-1.