不同处理对草木樨种子萌发特性的影响

摘要

In order to determine the optimum condition for Melilotus offcinalis seeds to break dormancy,the seeds of M.officinalis from Longxi county,Dingxi,peeled or unpeeled but exposed to 98％ H2SO4 were selected.The results showed that the germination rate and germination index ofM.officinalis seeds were promoted when exposed to 98％ H2SO4 for 10,20,30,and 40 minutes.The germination rate and germination index of peeled seeds treated with 98％ H2SO4 for 30 min were nearly 2 times higher than those of the unpeeled seeds.The results indicated that the best way to break hard seed was to use peeled seeds treated by 98％ H2SO4 for 30 minutes.%以采集于甘肃省定西市陇西县的黄花草木樨种子为材料,研究了98％浓硫酸处理下去皮与未去皮的草木樨种子的萌发特性,以此确定黄花草木樨种子解除休眠的最适条件.结果表明:98％浓硫酸处理下,浸泡10、20、30和40 min均提高了草木樨种子的发芽率和发芽指数,其中30 min处理下的去皮草木樨种子发芽率和发芽指数最高,约为未去皮草木樨种子的2倍.说明解除草木樨种子硬实率的最佳方法为对其进行去皮处理,并于98％浓硫酸浸泡30 min.