TRATAMENTO DE SEMENTES DE SOJA COM ZINCO: EFEITO NA QUALIDADE FISIOLÓGICA E PRODUTIVIDADE.

The study aimed to evaluate the effect of seed treatment of soybean with zinc in physiological quality of treated seed produced and the agronomic characteristics. The experimental design was completely randomized, factorial 2 X 5 (Lots: A and B, and the zinc source doses: 0, 2, 4, 6 and 8 ml kg-1 seed). After seed treatment, the physiological quality was assessed by germination, first germination count, cold test, accelerated aging, shoot and root length. After harvest, the agronomic characteristics and physiological seed quality were evaluated. For the agronomic traits, the number of seeds per plant, number of pods per plant and seed weight per plant were evaluated. For the produced seed quality, the same tests aforementioned was evaluated plus the emergency field test. The treatment of soybean seeds in doses ranged from 2 to 6 ml kg-1 seeds showed the best results for the physiological seed quality and agronomic characteristics. The number of seeds per plant, number of pods per plant and seed weight per plant have increments with increasing doses of zinc. The seed treatment with zinc does not influence the physiological produced seed quality. The lots show different behaviors in response to seed treatment with zinc. [ABSTRACT FROM AUTHOR]