毛竹种子萌发特性研究

Seed Germination Characteristics of Phyllostachys edulis

环境因素及其种子本身的状态对种子萌发的影响是植物生活史中的一个重要特征。该文采用室内发芽试验法研究了环境因素和种子质量对毛竹种子萌发特性的影响。结果表明:种子萌发的最适宜温度范围为20～30℃,低于15℃或超过35℃均不能很好萌发,最适萌发温度25℃。变温处理有利于发芽整齐。在自然环境下光照不是毛竹种子萌发的必要条件,但高光强会抑制幼苗生长。种子饱满度是影响种子活力的重要因素之一,明显影响种子萌发进程、发芽整齐度及苗木健壮程度。GA3处理能显著提高毛竹种子发芽势、发芽指数和活力指数,加快毛竹种子萌发进程,促进萌发后幼苗生长,GA3最适处理浓度范围为100～200mg/L。通过研究表明,温度是影响毛竹种子萌发的环境因素中的重要的限制因子,种子本身的质量和状态是种子活力高低的决定性因素。

The response of seed germination to enviroment and itself state were main characters for plant in its life history.In this study,the effects of the environmental factors such as light indensity and temperature,and seed quality to the seed germination of Phyllostachys edulis were investigated.Results showed that the optimal germination temperature ranges of Phyllostachys edulis were between 20 ℃ and 30 ℃.Seed of Phyllostachys edulis could not germinate well below 15 ℃ or over 35 ℃,and the optimal temperature for the seed germination was 25 ℃.Alternate temperatures were helpful to gernination uniformity.Light was not a significant and essential factor for the germination,but high light intensity could inhibit seedling growth.Seed plumpness was a crucial factor for seed vigor,obviously influenced germination course,germination uniformity and seedling health.GA3 increased germination energy,index of germination and index of vigor obviously,accelerated germination course and seedling growth.The optimal concentration ranges of GA3 were between 100～200mg/L.In addition,temperature was a main limiting factor affecting the seed germination of Phyllostachys edulis.Seed quality and its state were crucial aspects to decide seed vitality.