Componentes de produção de cultivares de girassol em diferentes arranjos espaciais

Abstract

The success of sunflower cultivation depends on carefully choosing varieties that are adapted to different environmental conditions and correctly adjusting the spacing between plants. .The aim of this study was to evaluate the yield components of two sunflower varieties in different spatial arrangements. The experiment was conducted under field conditions from October 2023 to February 2024, in the experimental area of Chã de Jardim, linked to the Center for Agrarian Sciences (CCA), of the Federal University of Paraíba (UFPB), Campus II – Areia, PB. The experimental design was randomized blocks in a 2 x 3 factorial scheme. being evaluated the varieties catissol 01 and multisol, in three different spacings (0.50 m, 0.70 m and 0.90 m) with four replications. Each experimental plot was formed of three rows of 4.0 m in length. The following variables were evaluated: plant height, stem diameter, diameter of the chapter, number of chapters, number of grains per chapter, seed mass per plant, mass of a thousand achenes and productivity. The data were submitted to the F test and the means were compared by Tukey's test up to 5% probability. The variables number of grains per capitulum and weight of one thousand achenes showed statistical significance among varieties (P<0.01). For spacing, only the thousand-achene mass (MMA) variable showed a statistically significant difference in relation to the other variables. The Multisol variety showed the best yield results. Despite the lack of statistical significance, The spacing of 0.7 m between rows proved to be the most viable option to maximize crop yield and profitability.