Qualidade da semeadura direta de milho com dois mecanismos de pressão no disco sulcador sob duas velocidades

• Ano de defesa: 2015
• Autor(a) principal: Silva, Vicente Filho Alves [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Milho; Controle de qualidade; Plantio direto; Mecanização agrícola; Máquinas agrícolas; Farm mechanization
• Link de acesso: http://hdl.handle.net/11449/123810; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/12-05-2015/000826744.pdf

Maize is an important economic alternative for the farmer. However, consistency throughout the planting process positively affects the quality and therefore the final crop yield. Thus, the aim of the present study was to evaluate the quality of mechanized sowing maize in relation to two depth control mechanisms of the seed unit, and two velocities, from the perspective of statistical process control. The experiment was conducted in the agricultural year 2012/2013 in the experimental area of the Department of Rural Engineering of UNESP/Jaboticabal. We used a randomized block design in a factorial 2 x 2 and 40 replicates within the blocks. The treatments consisted of two depth control mechanisms of the seed unit (Spring/Mechanical and AR/Pneumatic), and two velocities (5.1 km h-1 and 6.2 km h-1). The variables evaluated were: tillage, fuel consumption of the mechanized seeder tractor set and agronomic characteristics of corn. The agronomic characteristics of corn, the best depth control mechanism of the seed unit was with the tire, working on the lower speed. For fuel consumption variables and soil cultivation, it appears that the control system of the mechanism of pneumatic seed double disk in the lower speed (5.1 km h-1), was what we had under control in most of the variables with less variability of results.