The use of natural products in plant protection constitutes an important tool for the farmers to organic production. The study aimed to evaluate the efficiency of the calcium and silicon in the production and quality of soybean seeds. We used seeds of organic soybeans (Glycine max L.) cultivar BR36, from such cooperative in the 2004/2005 harvest. The experimental design used was randomized blocks with five treatments (calcium 40, calcium 50, silicon 40, silicon 50 and control). The treatments were compared by Duncan test at 5% probability. The variables of yield components were: number of pods per plant, seed number per pod, productivity and yield. The physiological quality of seeds was determined by tests: germination, first count germination, cold test, electrical conductivity and accelerated aging. Conclude that soybean plants treated with calcium and silicon produce seeds of higher physiological quality; treatments with application of Ca and Si reduce the seed yield per unit area.
germination; vigor
