Efeito de sistemas de manejo do solo e velocidade de semeadura no desenvolvimento do sorgo forrageiro/Effect of soil management systems and sowing speed on the development of forage sorghum

The aim of this study was to evaluate the effect of different management systems and sowing speeds on the development of forage sorghum cv. BRS 610. The soil of the experimental area was a Paleudult. The experiment was installed in field conditions, in FCA/UNESP, Botucatu Campus, using a randomized block split-plot design, with twelve treatments (four management systems and four sowing speeds). The plant population, plant height, stem diameter, mass of thousand grains, green mass yield and dry mass yield were analyzed. The no-tilllalge system provided the highest plant population, stem diameter, green mass yield and dry mass yield. There was a reduction in the plant population and increase in stem diameter with the increase in the sowing speed. The speed of 5 km h^sup -1^ provided the highest green and dry mass yields (kg ha^sup -1^), followed by the speed of 3 km h^sup -1^.