温度和水分对甘草种子萌发的影响

Effect of Temperature and Moisture Condition on Seed Germination of Glycyrrhiza uralensis Fisch

为探明甘草种子萌发的适宜温湿度条件以提高萌发率,并为其开发利用提供基础。在不同温度(10、15、20、25℃)和水分(10%、15%、20%、25%)条件下通过对萌发时滞、发芽势、发芽率、霉变率指标的测定来研究甘草种子的萌发特性。结果表明:(15℃,20%)、(20℃,15%/25%)、(25℃,20%/25%)组合处理下种子萌发时滞为3天,较其他组合处理下用时短;(25℃,15%/20%/25%)组合处理下种子的发芽势明显高于其他组合水平,说明高温高湿条件下甘草种子萌发较快;(25℃,20%)组合处理下种子的萌发率达到最高值,为92.00%;(25℃,10%/20%)组合处理下种子的霉变率较低,种子发霉数较少,萌发可能性较大。上述各项指标综合显示,甘草种子萌发适宜的温度和湿度条件为:温度25℃、发芽床含水量20%。

Seed germination characteristics at different temperatures（10, 15, 20, 25℃） and water conditions（10%, 15%, 20%, 25%） were studied to explore the suitable temperature and moisture condition, in order toprovide basic information and improve seed germination rate of Glycyrrhiza uralensis Fisch. The germinationdelay, germination potential, germination rate and the moldy rate were tested as germination indictors. Theresults showed that the germination delay in treatments of（15℃, 20%）,（20℃, 15%/25%） and（25℃, 20%/25%） were 3 d which was shorter than that in other treatments. The germination potentials in treatments of（25℃, 15%/20%/25%） were significantly higher than that in other treatments. It showed that Glycyrrhiza uralensis Fisch seeds geminated quickly at high temperature and high moisture condition. Seed germinationrate reached the highest level which was 92.00% at（25℃, 20%）. The moldy rate was lower in treatments of（25℃, 10%/20%） than that in others. The above indicators suggested that suitable temperature and moisturecondition for seed germination of Glycyrrhiza uralensis Fisch were 25℃ and 20%.