几种破除獐茅种子休眠的化学方法

Several chemical methods to break dormancy of Aeluropus littoralis seed

以野外采集的獐茅(Aeluropus littoralis)种子为材料,分别以98%H2SO4浸种2、5、10、20、30和60min、0.5%、1%、5%、10%和20%NaOH浸种30 min和0.2%、0.6%、1%、2%和5%KNO3溶液浸种24 h处理后进行种子发芽试验,研究不同化学试剂对獐茅种子发芽和幼苗生长的影响。结果表明,3种化学试剂均能提高种子发芽率,促进幼苗生长,其中98%H2SO4浸种5 min、10%NaOH浸种30min以及0.2%KNO3浸种24 h处理效果较好,发芽率分别为13.3%、42.2%和20.0%,幼苗长度分别为0.79、1.97和1.13mm。10%NaOH处理方法简单易行,破除獐茅种子休眠效果最好。

Present study investigated the effects of different soaking time with 98% H2SO4,different concentrations of NaOH and KNO3 solution on seed germination and seedling growth of Aeluropus littoralis.The results showed that both germination rate and seedling length of A.littoralis were significantly promoted by immersion in three chemical reagents.The effects were better,when putting seeds in 98% H2SO4 solution for 5 min,10% NaOH solution for 30min and 0.2% KNO3 solution for 24h,with seed germination of 13.3%,42.2% and 20.0%,and seedling length of 0.79mm,1.97cm and 1.1mm,respectively.It was concluded that the best treatment for the germination of A.littoralis was immersion in 10% NaOH solution.