Chlorophyll content of leaf and mineral composition of passion fruits irrigated with saline water and biofertilizers

Abstract

The work had for objective to evaluate to the mineral nutrition and photosynthetic pigment content at the time of first flowering of the yellow passion fruit plant. The treatments were disposed in randomized blocks 2x2x2 factorially arranged. The treatments were irrigated with water of low (0.5 dS m^-1) and high salinity (4.5 dS m^-1), with and without bovinebiofertilizers, with and without mulch. In the full flowering of the plants were evaluated the content of macronutrients N,P, K, Ca, Mg and S in dry matter of leaf tissue and the concentration of chlorophyll a, b, total carotenoids in the dry plants. The treatment plants were adequately supplied with biofertilizers in nitrogen, potassium, magnesium and sulfur. The irrigation with saline water has caused imbalance in the accumulation of leaf potassium, calcium and magnesium. The bovine biofertilizer attenuated the depressive effects of salts in pigment chlorophyllian and carotenoids of yellow passionfruit. The mulching increased the photosynthetic condition of yellow passion fruit irrigated with saline water.