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1.水稻种子含水量为13%,纸袋包装于常温常湿下,15个月后,其发芽率为90%以上。经第二年夏季后,发芽率明显地下降,3年后其发芽率为0%。这说明,在上述贮藏条件下,其实用贮藏期只有15个月。但在7℃及50%相对湿度的恒温恒湿条件下(其他条件不变),贮藏5年后,其发芽率还在90%以上。如果把种子干燥至含水量为10%,又密封在罐里时,可贮藏10年以上。 Roderts(1961)认为,稻麦类种子的发芽率的半衰期(50%发芽率)与种子含水量和贮藏温度有如下关系式: log P=KV-C_1m-C2t
1. Rice seed moisture content of 13%, paper bags packed at room temperature and humidity, after 15 months, the germination rate of 90%. After the second year of summer, the germination rate decreased obviously, and the germination rate was 0% after 3 years. This shows that under the above storage conditions, the practical storage period is only 15 months. However, under the conditions of constant temperature and humidity of 7 ℃ and relative humidity of 50% (other conditions remain unchanged), after 5 years of storage, the germination rate is still above 90%. If the seeds are dried to a moisture content of 10%, and sealed in the tank, can be stored for more than 10 years. According to Roderts (1961), the half-life (50% germination rate) of rice germplasm germination rate is related to the seed water content and storage temperature log P = KV-C_1m-C2t