Teor foliar de silício em Brassica napus e Brassica juncea fertilizadas com silicato de cálcio

Abstract

Canola is the third most produced oilseed in the world and is an excellent option for the second crop in central Brazil. The insertion of canola in the crop rotation makes it possible to break the phytopathogen cycle of the most used crops for grain production, such as corn and soybean. Silicon is a beneficial element for the development of various plant species, and increases plant resistance against biotic and abiotic stresses. This study evaluated the uptake of silicon in the species Brassica napus and Brassica juncea. The experiment was done in randomized block design, as a 2x3 factorial with two species (B. napus and B. juncea) and three fertilization doses (0 kg ha-1 of Si, 2000 kg ha-1 of Si and equivalent dose in calcium carbonate), and eight replicates per treatment. The Si content in the leaves (%) was evaluated. Data were submitted to analysis of variance by the test F and the averages compared by the Tukey test at 5% probability. Silicon fertilization provided greater levels of Si in the leaves of the species used in the study, with the greatest content in B. juncea compared to B. napus. The contents of Si in the leaves were similar to those found in dicotyledonous plants of other families.