贮藏期间温度和水分对生物型包衣油菜种子寿命的影响

The influence of temperature and moisture content on the longevity of biocoated rapeseed (Brassica napus L.) during storage

用生物型种衣剂进行包衣处理,以未包衣种子作对照,把3种不同含水量的油菜种子分别密封贮藏在高、中、低3种不同温度条件下,分期取样测定种子发芽率的变化,结果表明:含水量为4.1%的来包衣种子在所有贮藏温度条件下均能保持较高的发芽率,而含水量为8.6%的在25℃、35℃条件贮藏后种子发芽率均有所下降,含水量为11.1%的种子则劣变加快,在贮藏温度35℃条件下经3个月贮藏后发芽率降为0.生物型种衣剂包衣油菜种子在所有贮藏条件下劣变速度均低于未包衣种子.相对于种子含水量和贮藏温度的提高,包衣种子的发芽率下降较慢,经1年贮藏后所有的包衣种子均能保持75%以上的发芽率.包衣种子的发芽势与发芽指数也均高于未包衣的对照种子.

Bio-coated and uncoated rapeseed (Brassica napus L.) with three different moisture contents (MC) were stored under three different temperature conditions. Germination tests were conducted in various storage periods. The results showed that uncoated seeds with 4.1% MC retained high germination percentage at all temperatures, but germination percentage of the seed with 8.6% MC fell slightly at both 25 ℃ and 35 ℃. The uncoated seeds with 11.1% MC deteriorated rapidly with germination percentage falling to 0% at 35 ℃. Bio-coated seeds deteriorated more slowly than the uncoated seeds in all storage conditions. Whilst germination of coated seeds did fall slightly in response to increased moisture content and storage temperature, all coated seeds retained a germination percentage above 75% after one year storage. The germination energy and germination index of bio-coated seeds were much greater than that of uncoated seeds.