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A época de colheita é um dos fatores mais importantes que influenciam as características da semente de arroz, seja para semeadura ou para consumo. Com o objetivo de determinar a época adequada de colheita do arroz (Oryza sativa L.) irrigado BRS 7 TAIM, sementes dessa cultivar foram colhidas aos 15, 22, 29, 36, 43 e 50 dias após o florescimento (DAF) e avaliadas quanto à umidade, produtividade, peso seco de 100 sementes, rendimento de grãos inteiros, viabilidade e armazenabilidade. As colheitas realizadas aos 15 e 22 DAF revelaram-se impróprias, obtendo-se valores inferiores em todas variáveis estudadas, além de alta umidade inicial das sementes. As sementes colhidas aos 29 DAF tiveram alta qualidade, porém, a produtividade foi inferior à dos períodos subseqüentes; as provenientes da colheita aos 50 DAF exibiram bom desempenho, exceto no rendimento de grãos inteiros. A melhor época de colheita para a cultivar Taim ocorre entre 38 e 42 DAF, quando as sementes apresentam índices superiores de produtividade, peso seco, rendimento de grãos inteiros, qualidade fisiológica e armazenabilidade. Harvesting time is one of most important factors which influence rice seed characteristics for the purpose of planting or milling. With the objective to determine the proper period of harvesting of irrigated rice (Oryza sativa L.) the seeds of BRS 7 TAIM cultivar were harvested at at 15, 22, 29, 36, 43 and 50 days after flowering, dryed, processed for cleaning purpose and evaluated in relation to moisture, productivity, dry weight of 100 seeds, undamaged rice yield, viability and storability. Seeds harvested at 15 and 22 days after flowering showed low performance exhibiting deficiency in all variables studied, besides high initial humidity. Seeds harvested at 29 days showed hight quality, but yield was lower than those of later periods. Those obtained from harvest at 50 days showed good performance, with exception for undamaged rice yield. The best harvesting period considering TAIM cultivar is between 38 an 42 days after flowering, when seeds present high rates of quality, yield, dry weight, undamaged rice yield, physiological quality and storability

Épocas de colheita e qualidade fisiológica das sementes de arroz irrigado cultivar BRS 7 TAIM, em Roraima