Qualidade de sementes de arroz (Oryza sativa L.) colhidas em diferentes graus de umidade e rotações do cilindro

Abstract

This paper aims to verify the behavior of seeds quality types IRGA 422 CL and BRS Querência under harvest operations with different moisture content at different cylinder rotation. This work was developed at Boqueirão Ranch, located in Arroio Grande, Rio Grande do Sul in a 1200 hectares area. The analysis was carried out using an experimental random design with four replications combining moisturing levels (22, 18 e 14%), cylinder rotation (750 e 600 rpm) and ties (BRS Querência e IRGA 422 CL) composing a factorial 3x2x2. The variables were subjected to analysis of variance and averages were compared by Duncan test at 10% significance level. The conclusions were: for both cultivars and cylinder rotations of the harvester, harvest at 22 or 18 % moisture showed no significant differences in quality of seeds; seeds harvested at 22 and 18% moisture have higher quality ones taken with 14%; for both cultivars when harvested at 22 and 18% moisture, the rotations tested did not cause differences in their quality, but there is a reduction, when taken with 14% moisture.