Níveis de alumínio e acúmulo de macronutrientes em porta-enxertos cítricos em cultivo hidropônico

Abstract

The aim of this research was to study the influence of different levels of aluminum on macronutrient contents of citrus rootstocks of the ‘Rangpur’ lime and the ‘Swingle’ citrumelo, in hydroponic solution. The treatments, established under greenhouse conditions, followed a completely randomized experimental design, with 3 replications, distributed in split-plots. The levels of aluminum were: 0; 7.5; 15; 22.5 and 30 mg L-1, applied as AlCl3.6 H2O. The evaluated chemical plant parameters were the concentrations of N, P, K, Ca, Mg, S, Al and dry weight of leaves, stem and root system. The results showed that with adition of 7.5 mg L-1 of Al to the nutrient solution there was a significant decrese of nutrient contents and a decrese in leave, stem and root system dry weight of ‘Swingle’ citrumelo.