Qualidade do processo de colheita semimecanizada do milho

• Autor(a) principal: Reis, Maria Albertina Monteiro dos
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/36727
• topic: Análise de pureza; Perdas; Trilhadora

The semi-mechanized harvest consists of the removal of the spike done by hand, after the manual harvest, the spikes are taken to the thrashing at a thrashing machine. The thrashing is the process in which the grain is separated from the spike of the corn, is the last stage of the producing therefore is necessary to prevent losses in this process. The goal of this study is to evaluate the losses and the purity analysis on the corn thrashing machine, verifying the quality of the semi-mechanized harvest of the corn in function of the variation of the moisture determination of the grains and the opening of the concave. The evaluations were realized in the mechanization experimental area belonging to the Núcleo Integrado de Mecanização e Projetos Agrículas of the Universidade Federal do Ceará. It was utilized a stationary thresher Maqtron, model B-150 with toothed cylinder, connected to a tractor 4x2, model Massey Ferguson 265, power of 47,80 kW (65hp). The treatments were made by two moistures U1- 20% and U2 – 14,5%; and five openings of the concave, C1 – 64,73 mm, C2 – 70,37 mm, C3 – 70,6 mm, C4 – 78, 93 mm and C5 – 83,1 mm. The experimental design used was complete randomized blocks (DIC), in a 2x5 factorial arrangement in 4 replications, resulting in 40 treatments. The parameters evaluated were: damaged seeds (SD), inert material (MI), pure seeds (SP), losses in the feeding system (PSA), losses at the remove-straw area (PSP), Threshing (RE) and total losses (PT). The data was submitted to an analysis of variance and when significant was submitted to a 5% of probability Tukey test for average comparison. The data was also submitted to a regression analysis of variance for the two moistures at the threshing moment in function of the concave openings, when significant, was submitted to a 5% of probability and bigger determination coefficient F test determining the adjusted regression curves. For the validation of the models was realized a analysis of residue. It was concluded that the higher quality of the process of semi-mechanized harvest of corn is obtained with moisture of 14.5% associated with the opening of the concave of 83,1mm.