soybean seed quality, harvested by hand and mechanically, with different levels of moisture content
qualidade de sementes de soja colhidas de forma manual e mecânica com diferentes teores de água

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ID: 210785
2012
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Abstract
The harvest is one of the main steps in the production process of soybean seeds. The right time to harvesting can vary depending on the type of harvest and seeds moisture content. The goal of this research was to determine alterations in soybean seeds physiological, harvested with different levels of seed moisture content, by hand and mechanically. The soybean seeds were from cultivars Embrapa 48 and FTS Águia, which have differences in seed coat lignin content, harvested by hand and mechanically with the moisture contents of 18.0, 15.0 and 12.0%. After harvest, the seeds were submitted to drying, and the seed quality was evaluated by germination, seedling emergence, tetrazolium (viability and vigor), accelerated aging tests and seedling speed of emergence. Then, seeds were kept in storage conditions (20 °C and 45% RU) and analyzed soon after the harvest and at six months of storage. The results indicated that seed physiological potential, is not affected, when: harvested by hand with seeds moisture content of 11.4% to 18.4%; and for seeds harvested mechanically, with moisture content between 12.0% to 15.9%; maintaining physiological quality, even after the storage period.

A colheita é uma das principais etapas no processo de produção de sementes de soja. O momento adequado para se efetuar a colheita pode variar em função do tipo de colheita e do grau de umidade das sementes. Neste sentido, o objetivo dessa pesquisa foi determinar as alterações fisiológicas de sementes de soja colhidas de forma manual e mecânica com diferentes teores de água. Para tanto, utilizaram-se sementes das cultivares Embrapa 48 e FTS Águia, que têm diferenças no teor de lignina do tegumento, colhidas de forma manual e mecanicamente com 18,0; 15,0 e 12,0% de água. Após a colheita, as sementes foram submetidas à secagem, e a qualidade das sementes foi avaliada pelos testes de germinação, emergência de plântulas, tetrazólio (viabilidade e vigor), envelhecimento acelerado e índice de velocidade de emergência de plântula. Em seguida, as sementes foram armazenadas (20 °C e 45% UR do ar) e analisadas logo após a colheita e aos seis meses de armazenamento. Os resultados obtidos indicam que o parâmetro fisiológico das sementes de soja, não é afetado, quando: se realiza colheita manual com grau de umidade das sementes de 11,4% a 18,4%; e para sementes colhidas à máquina, com grau de umidade entre 12,0% a 15,9%; mantendo a qualidade fisiológica mesmo após seis meses de armazenamento.

Reference Key
novembre2012semina:soybean Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Ana Dionisia da Luz Coelho Novembre;Tereza Cristina de Carvalho
Journal frontiers in neuroendocrinology
Year 2012
DOI
10.5433/1679-0359.2012v33n1p155
URL
http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/5947
Keywords
Agriculture (General) glycine max armazenamento

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