Nutrição mineral de hortaliças: III. deficiências de macronutrientes em beringela

Abstract

Eggplants (Solarium melongena L.var. Hibrida F Piracicaba nº 100) were grown in pots containing 1 kg of pure quartz. Twice a day they were irrigated by percolation with nutrient solution. The treatments were: complete solution, -N, -P, -K, -Ca, -Mg and -S. The plants showed deficiencies symptoms in the following order: N, P, K, Ca, Mg and S. The deficiencies were comproved by chemical analysis of the different parts of the plant. The percentages of macronutrients, in dry matter are expressed on the Tables 2 and 3 in Portuguese text. The following amounts of element in mg/plant were absorved: N = 2,307.5 P = 213.7 K = 2,799.9 Ca = 1,543.0 Mg = 50.9 S = 144.0