Abstract
The aim of this work was to correlate macronutrient content of soybean seeds to physiological quality of different cultivars. The work was developed in the Federal University of Pelotas, in the facilities of the Seed Science and Technology Graduate Program. The experimental design was randomized blocks in arranged in four replicates. The following soybean cultivars were used: BMX Apolo RR (12 lots), BMX Ativa RR (13 lots), BMX Energia RR (26 lots), BMX Força RR (24 lots), BMX Impacto RR (35 lots), BMX Magna RR (16 lots), BMX Turbo RR (44 lots), BMX Potência RR (82 lots) and NA 5909 RR (28 lots), with seeds produced in northwest Rio Grande do Sul. The determination of nutritional contents found in plant tissues of soybean seeds, were measured: Nitrogen (N), Phosphorus (P), Potassium (K), Magnesium (Mg), Calcium (Ca), Sulfur (S). The macronutrient contents of the seeds vary according to genetic characteristics of the cultivars, with higher oscillations of nitrogen, phosphorus, magnesium and sulfur contents present in soybean seeds. Potassium and calcium are defined as the most stable nutrients for the cultivars and seed lots analyzed. High concentrations of nitrogen, phosphorus and calcium are determinants for the physiological quality of soybean seeds.
Highlights
The soybean crop stands out with 49% of the Brazilian agricultural area
Soybean seeds from different cultivars and lots vary in chemical composition due to cultivation in different environments, reflecting on their physiological quality (Delarmino-Ferraresi et al, 2014; Szareski et al, 2015)
The following soybean cultivars were used: BMX Apolo RR (12 lots), BMX Ativa RR (13 lots), BMX Energia RR (26 lots), BMX Força RR (24 lots), BMX Impacto RR (35 lots), BMX Magna RR (16 lots), BMX Turbo RR (44 lots), BMX Potência RR (82 lots) and NA 5909 RR (28 lots), with seeds produced in northwest Rio Grande do Sul
Summary
The soybean crop stands out with 49% of the Brazilian agricultural area. This increase is mainly due to factors related to crop management and several utilization purposes (Ferrari et al, 2014). The use of seeds with high physiological quality plays fundamental role for a crop to achieve high yields, since seedsof high quality have faster metabolic processes, providing auniform emission of the primary root during germination and higher growth rate, originating seedlings with higher initial stature, growth and grain yield (Schuch et al, 2009; Peske et al, 2012; Szareski et al, 2016). The physiological quality of the seeds may be influenced, both positively and negatively, by many factors, where the nutrients play determinant role (Follmann et al, 2014). Soybean seeds from different cultivars and lots vary in chemical composition due to cultivation in different environments, reflecting on their physiological quality (Delarmino-Ferraresi et al, 2014; Szareski et al, 2015)
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