Aplicação de zinco em sementes de sorgo cv. BRS 304: efeitos na nutrição e no crescimento inicial

摘要: The effect of zinc applied in seeds on the nutrition sorghum is affected by sources and rate. present work aimed to evaluate application, from two sources, initial growth a culture cv. BRS 304, cultivated sand. treatments consisted five rates (0, 14.3, 28.6, 57.2 114.4 g kg -1 seed) – sulphate (22% Zn) oxide (50% Zn). At 25 days after sowing, plants were cut. aerial root dry mass was evaluated, levels accumulation Zn determined. application 14 seeds, form, provided adequate 304. source promoted greater absorption for plants, reaching its highest dosis, high nutrient part (> 4170 mg ) developing characteristic symptoms phytoxicity.