Perdas na colheita mecanizada de soja em lavouras comerciais de municípios da Região Nordeste e Noroeste do Rio Grande do Sul na safra 2020/2021

Abstract

Grain losses in mechanized harvesting is one of main problems found in soybean crop production. In view of the above, the objective of this study was to characterize mechanized harvesting losses of soybean crop in commecial tillages from Rio Grande do Sul northeast and northwest region counties, quantifying natural losses, cutting platform losses, internal mechanisms and total losses of six different harvesters, in function of two work speeds. The harvest was realized using completely randomized design, with factorial scheme 6x2, being treatments compounds six harvesters operating in two displacement speeds, 3,5 km h-¹ e 7,0 km h-¹, with three repetitions. Were used harvesters John Deere model S550, year of manufacture 2018, John Deere model S440, with two copies, year of manufacture 2019 and 2020, John Deere model S430, with two copies, year of manufacture 2020 e 2021, and New Holand model CR 5.85, year of manufacture 2019. Were evaluate soybean grain losses caused by internal mechanisms, cutting platform and total losses. Concludes than in internal mechanisms there was no significant difference between the properties evaluated. Cutting platform losses presented greatest contribution to total losses. The 7 km h-1 displacement speed presented greater total losses about 3,5 km h-1 speed.