Teor de nutrientes e qualidade fisiológica de sementes de soja

Abstract

The effect of nutrients applied to the soil or by foliar application has been fairly studied in relation to aspects of plant nutrition, however, the effects of mineral nutrients contained in the seeds themselves on plant establishment has not received the same attention. Thus, the objective of this study was to evaluate the correlation of nutrient content contained in soybean seeds with their physiological quality, as well as compare the nutrient content of different soybean cultivars. Nutrients were analyzed, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, copper, iron, manganese, zinc and molybdenum, more sodium and aluminum. The physiological quality analyzes were, germination, accelerated aging, viability and vigor by tetrazolium, as well as the weight of a thousand seeds. Soybean cultivars seeds were used, BMX Apolo RR, BMX Ativa RR, BMX Energia RR, BMX Força RR, BMX Impacto RR, BMX Magna RR, BMX Turbo RR, BMX Power RR and NA 5909 RR, produced by a seed producer company located in the northwest of the state of RS, in the 2011/2012 harvest. The results were analyzed using Pearson correlation and mean comparison was used the Tukey test at 5% probability. The macronutrient content, except for potassium and calcium, the seeds varied among cultivars. Nitrogen, phosphorus and calcium are the macronutrients that contribute most beneficially for the physiological quality of seeds of some soybean cultivars. The cultivars vary in micronutrient content in seeds, except for iron. Molybdenum and copper are the micronutrients that most beneficially influence the physiological quality of seeds of some soybean cultivars. Seeds of some soybean cultivars with high levels of iron and aluminum have their physiological quality affected negatively.