Resposta de cultivares de soja à suplementação de silício no Cerrado piauiense

Abstract

Silicon (Si) supplementation in soybeans can improve its production components and, consequently, increase grain productivity. This strategy is particularly valuable for coping with climate variations, especially in rainfed farming areas. However, research exploring the relationship between different soybean cultivars and Si nutrition in the Cerrado is still limited. Therefore, the present study aimed to evaluate the production components and grain productivity of different soybean cultivars in response to foliar silicon supplementation. The experiment was conducted in a randomized block design, in 2x6 split plots, with four replications. The plots consisted of two levels of Si, absence and presence of the element, 0 and 8.4 g ha-1 respectively, while the subplots were composed of six soybean cultivars: Olimpo IPRO, M8606 I2X, Domínio IPRO, Extrema IPRO, TMG 2379 IPRO and I2X Attack. The following characters were analyzed: plant height, number of branches, number of reproductive nodes, number of pods, number of grains per pod, mass of one thousand grains and productivity. The application of Si promoted an improvement in the agronomic performance of the soybean cultivars used, positively impacting their production components. Si supplementation proves to be beneficial for the cultivars M8606 I2X, Attack I2X and Domínio IPRO, as it enhances grain productivity, with these cultivars being responsive to the supply of the element.