Desempenho de mecanismos dosadores de precisão quanto a qualidade da distribuição de sementes de soja

Abstract

For the growth of Brazilian soybean production and exports, it is necessary to use appropriate and quality equipment that efficiently meets the demand. Nowadays and in the future, agriculture will be increasingly taken by the advancement of technology, in a constant challenge in which time, related to the chance of getting the sowing cycle right and linked to human training, goes counterpoint to reaching the population increase and the need for food. The objective was to compare the performance of seed plate metering in the distribution of soybean seeds by analyzing the acceptable, multiple and flawed spacing, with the influence of the displacement speed and the sowing density, in addition to the efficiency of these equipment regarding their precision and their accuracy. The experiment was carried out at the Agricultural Machinery Research and Development Laboratory, LASERG, at the Universidade Federal de Santa Maria, UFSM. The design was completely randomized (CRD- Completely Random Design), with a 2x4x4 tri-factorial arrangement in 3 repetitions, totaling 96 experimental units, with the dosing factors (A and B), displacement speed (3, 5, 7 and 9 km h-1) and the sowing density (12; 14; 16 and 18 without m-1). The Stand for Seed Metering Test (BEDOSA) was used for data collection, where these equipped with a 90-hole dosing disc were coupled. It is concluded that the best adjustment is the forward speed V1 = 0.83 m s-1 and the sowing density D2 = 14 seed m-1, as they present the best performances for these seed metering.