Physiological quality of soybean seeds as a function of organic-mineral fertilizers

Abstract

The objective of this work was to evaluate the physiological and sanitary quality of soybean cultivars as a function of doses and sources of organomineral fertilizers. The experimental design was randomized blocks arranged in a split-split plot, with three replications. In the main plots, the treatments consisted of two soybean cultivars (BRASMAX Bônus IPRO and BRASMAX Olimpo IPRO), and in the subplot, the treatments consisted of three phosphate fertilizers [two organomineral fertilizers manufactured and a phosphate fertilizer (simple superphosphate)]. In the subplot, doses of 0 (control), 50 and 100 kg of P2O5 per ha-1 were used. The following parameters: moisture content, emergence, total dry weight, germination, accelerated aging, electrical conductivity and seed sanity were used in current investigation. The use of organomineral fertilizers resulted in positive effects on the physiological quality of soybean seeds, although the incidence of the pathogens Cercospora sp., Aspergillus niger, and Rizoctonia sp. were larger. The combinations of the factors “BRASMAX Bônus IPRO + 50 kg of P2O5 per ha-1 + ORG1 or ORG2” and “BRASMAX Olimpo IPRO + 100 kg of P2O5 per ha-1 + ORG2” were associated with greater physiological and sanitary quality of the seeds of soybean.