PHYSIOLOGICAL QUALITY OF SORGHUM SEEDS AS AFFECTED BY SIDEDRESSED NITROGEN FERTILIZATION
MARIANA ZAMPAR TOLEDO | CLÁUDIO CAVARIANI | JOÃO NAKAGAWA | ELZA ALVES | GUSTAVO PAVAN MATEUS | CARLOS ALEXANDRE COSTA CRUSCIOL
Sorghum has been used as promising specie in dry winter regions at crop rotation systems. Among the factors that interfere on its seed production, the action of the soil environment, due to its management, associated to plant nutrition mainly by nitrogen, can produce seeds of high quality. The present research had the objective to evaluate the effects of side-dressed nitrogen doses on physiological quality of sorghum seeds. The experimental design was the completely randomized block, with five treatments of side-dressed nitrogen, applied at the doses 0, 50, 100, 150 and 200 kg ha-1, in the urea form, with four replications. The sorghum seeds were evaluated by protein, germination and vigor tests. The results were submitted to analysis of variance, regression and correlation test. By the results it can be concluded that the physiological quality of sorghum seeds is affected by side-dressed nitrogen application and that the dose of 100 kg ha-1 resulted in higher seed quality.
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