不同处理对野皂荚与皂荚种子发芽的影响

野皂荚(Gleditsia microphylla)和皂荚(Gleditsia sinensis)的种子坚硬,种皮透水性差,自然条件下萌发困难,发芽率和成苗率低。为此,本文探讨了实验室条件下不同机械破皮位置(子叶顶端、中部、胚根端)、不同浸种温度(25°C、37°C、42°C)和不同土质类型(黏土、沙土、营养土)对两种皂荚属种子发芽率的影响。试验结果表明:在胚根端进行机械破皮、37°C水浴浸种8 h或16 h和黏土中萌发处理的种子发芽率和成苗率最高,野皂荚种子平均发芽率达88.33%,皂荚种子的发芽率达94.33%,且出苗整齐一致。

Effects of Different Treatments on Seed Germination of Gleditsia microphylla and Gleditsia sinensis

Seeds of Gleditsia microphylla and Gleditsia sinensis are hard and the seed coat is poor in water permeability,so the germination and seedling rates are very low under natural conditions.Therefore,scraping seed coat at different parts of seed(top,middle,bottom),seed soaking at different temperatures(25℃,37℃,42℃)and germinating in different types of soil(clay,sandy soil,nutrient soil)on germination rate were explored under laboratory conditions in this study.The results showed that the seeds had highest germination rates under combined conditions of scraping seed coat at radicle end,then soaking seeds at 37℃for 8h or 16h and germinating in clay.Average germination rate of Gleditsia microphylla reached 88.33%and Average germination rate of Gleditsia sinensis reached 94.33,and the seedlings came out evenly.