人工处理黄槿种子萌发的研究

Study on the Germination of the Treated Hibiscus tiliaceus Seeds

采用不同体积分数的赤霉素、水杨酸溶液处理黄槿种子之后,将种子播入不同的土壤基质中,从野外林地试验和盆栽试验中观察种子的萌发情况。结果表明,在原土盆栽试验中,体积分数为200μL/L的赤霉素处理可使发芽率达到38.0%、发芽势达到35.3%;400μL/L的水杨酸处理可使发芽率达到42.6%、发芽势达到32.0%。在沙土盆栽试验中,20μL/L的赤霉素处理可使发芽率和发芽势均达到最高,发芽率为39.4%、发芽势为36.0%;10μL/L的水杨酸处理可使发芽率和发芽势都达到最高值,发芽率为30.6%、发芽势为22.7%。在野外林地试验中,赤霉素和水杨酸的体积分数均在400μL/L时达到最高,赤霉素处理的发芽率为26.5%、发芽势为18.3%;水杨酸处理的发芽率为33.5%、发芽势为26.7%。通过试验获得了黄槿种子在野外木麻黄林地发芽的最佳处理条件,为将乡土树种黄槿应用于木麻黄海防林的混交种植提供了技术参考,有利于形成多样性丰富的多树种海防林。

Hibiscus tiliaceus L.seeds were treated by different concentrations of Gibberellin（GA） and Salicylic acid（SA） and placed in different soil types for germination.Seed germination was observed in pot experiment and field experiment.The results showed that the germination rate was 38.0 % and the germination potential was 35.3 % in the original soil when the seeds were treated by 200 μL/L GA.The germination rate was 42.6% and the germination potential was 32.0% in the original soil when the seeds were treated by 400 μL/L SA.In the pot experiment,both germination rate and germination potential reached the highest at the GA concentration of 20 μL/L,the germination rate was 39.4% and the germination potential was 36.0%.The germination rate and the germination potential were both the highest value at the SA concentration of 10 μL/L,the germination rate was 30.6% and the germination potential was 22.7%.In the field experiment,the germination rate and the germination potential reached the highest at the concentration of 400 μL/L salicylic acid and 400 μL/L GA,the germination rate was 26.5% and the germination potential was 18.3% for the GA treatment.The germination rate was 33.5% and the germination potential was 26.7% for the SA treatment.The best conditions for the hibiscus seed germination were obtained through the experiments.It provided the technical reference for the coastal forest construction of Casuarina equisetifolia L.mixed planting with H.tiliaceus.