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Effects of dry-heat treatment at 76°C on germination and vigour of radish seed

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The effects of different dry-heat (76°C) treatment times (12h to 72h) and initial seed moisture contents (3.2% to 9.4%) on seed germination and seed vigour of radish (Raphanus sativus L. var, longipinnatus Bailey cv. Xin Li Mei) were studied. At 3.2% seed moisture content, germination and vigour were maintained well after 48h drying, but vigour was reduced after 60h and germination after 72h. At 9.4% seed moisture content germination fell significantly after 36h and vigour was reduced after 12h. The recommended 48h dry heat treatment at 76°C reduced seed quality (germination and/or vigour) for all seed moisture contents above 3.2%, these reductions increased as initial seed moisture content increased.
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Document Type: Research Article

Publication date: April 1, 2003

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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