Mineral composition of yellow passion fruit plants in response to bovine biofertilizer and potassium chlorite in soil

Abstract

The experiment was carried out in the Remígio County, Paraiba State, Brazil, in order to evaluate the effects of bovine biofertilizer applied to soil in liquid form in the absence and presence of potassium chloride (KCl), on the leaves contents of macronutrients and micronutrients of the yellow passion fruit plants. The treatments were arranged in randomized blocs, with three replications and nine plants by plot, using a factorial 5 x 2, corresponding to the doses of bovine biofertilizer, diluted with water in proportion to 1:4 applied in levels 0, 4, 8, 12 and 16 L plant^-1, in soil without and with 25 g plant^-1 of K₂O. The biofertilizer was applied 30 days before and every 90 days after planting, and potassium in commercial form KCl was applied every two months, from 60 days after planting up to the end of experiment. The biofertilizer alone is not enough to meet the nutritional requirements of yellow passion fruit. Only plants in soil with KCl were adequately supplied in K.