Abstract

The research had as objective to study the influence of the doses of nitrogen, phosphorus and potassium on soil fertility and nutritional status of yellow passion fruit plants. The experimental design was in randomized blocks in an incomplete fractioned factorial 1/2 (4 × 4 × 4), with four doses of N (150, 300, 600 and 1200 Kg^-1 ha^-1 yr^-1 N); four doses of P₂O₅ (200, 400, 800 and 1600 kg^-1 ha^-1 yr^-1) and four doses of K₂O (100, 300, 500 and 700 kg^-1 ha^-1 yr^-1). The fertilizers used were the ammonium nitrate = 32% N; triple superphosphate = 44% P₂O₅ and potassium chloride = 60% K₂O. In the fertility of the nitrogen fertilization increased the content of phosphorus and sulfur. The doses of P₂O₅ increased the concentration of P in the soil. The doses of K₂O influenced the increase in the content of K in the soil in the harvest 2013/2014. There was an interaction of the doses of N and K₂O in the availability of K in the soil in the harvest 2012/13 with the maximum levels of K, in the doses of 200-400 kg N ha^-1 and 600 to 700 kg ha^-1 of K₂O. In the nutritional state the yellow passion fruit plants was influenced by the doses of N for the sulfur content of the leaves. The maximum content of S leaf concentration of 3.63 g kg^-1 was obtained in the dose estimated at 1120 kg ha^-1 of P₂O₅.

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