Deposição de sementes de soja em semeadura com dosadores mecânicos de precisão

Abstract

Soybean is one of the main crops produced in Brazil and in the world, having great socio-economic importance. Brazil in 2020 passed the United States in the world production ranking of this culture. Factors such as cultivar improvement contribute to this increase, followed by proper management practices, ranging from sowing to harvest, bringing good results. Among the factors that contribute to productivity is sowing, which must seek to be more uniform and precise in order to obtain the best performance of the crop. Therefore, the objective of this work was to evaluate the longitudinal distribution and the performance of two types of horizontal bladed disks in a field experiment, operating at different displacement speeds. The work was carried out in the year 2020, in the experimental area of the Federal University of Fronteira Sul, in the city of Cerro Largo- RS. The disks used were of the conventional type and with a ramp (Rampflow®) and the speeds were 4, 6, and 8 km h-1 which resulted in 6 treatments. The design used was that of randomized blocks (DBC). The results obtained had no statistically significant difference, but they made it possible to identify the best treatment, and that the Rampflow® technology enables a better distribution of seeds at sowing speeds in relation to conventional discs.