Leaf composition and productivity of yellow passion fruit (Passiflora edulis Sims.) Access “Guinezinho” in soil with bovine biofertilizer and nitrogen

摘要

The use of alternative inputs, derived from the fermentation of fresh organic matter, exerts significant importance in the pasiculture in partial substitution to synthetic commercial fertilizers.An experiment was conducted in the period from 2013 to 2014 to evaluate the effects of bovine biofertilizer and nitrogen, on leaf mineral composition of macronutrients, micronutrients and sodium and productivity of yellow passion fruit. The treatments were arranged in randomized blocks with three replicates and nine plants per plot, using the factorial scheme 5 × 2, referring to the bovine biofertilizer applied to the soil in the liquid form (B) in the proportions in water (W) of 0 (0B + 4W); 25 (1B + 3W); 50 (2B + 2W); 75 (3B + 1W) and 100% (4B + 0W), in the soil without and with nitrogen. The bovine biofertilizer was applied at level of 4 L plant -1 of each proportion in water, at 7 days before and 90 days after transplanting of the seedlings with aged 50 days from fruit seeds well developed in size, oblique shape and mass and the nitrogen was applied to every 30 days after transplantation of the seedlings until the end of the experiment. The plants, in general, were adequately supplied in N, Mg, S, B, Cu and Zn, but deficient in P, K, Ca, Cu, Fe and Mn at the beginning of flowering. The highest fruit production of 30.75 t ha -1 were obtained from the plants on soil with 100% of bovine biofertilizer and with nitrogen. Due to the superiority of fruit productivity in plants with biofertilizer bovine and nitrogen compared to those treated with only bovine biofertilizer, it is verified that the organic input does not substitute the nitrogen for the cultivation of the yellow passion fruit.