重金属在不同温度和光照下对骆驼蓬种子萌发特征的影响

应用正交试验设计研究了不同浓度的Ni2+,Cu2+,Co2+和温度、光照组合下对骆驼蓬种子萌发特征的影响。结果表明,低浓度的Ni 2+,Cu2+,Co2+混合溶液有利于提高骆驼蓬的发芽势、发芽率和发芽指数,高浓度则表现出明显抑制性;不管混合溶液中重金属离子浓度的高低,都会不同程度地影响骆驼蓬幼苗生长,但浓度较低时抑制不显著;在Ni 2+浓度5mg/L,Cu2+浓度800mg/L,Co2+浓度400mg/L,温度25℃,光照12h处理下骆驼蓬的种子萌发快,发芽率相对较高;在不同条件作用下,骆驼蓬幼苗生长的最佳条件是Ni 2+浓度100mg/L,Cu2+浓度100mg/L,Co2+浓度50mg/L,温度25℃,光照12h。

Effects of Heavy Metals on Seed Germination Characteristics of Peganum Harmala Under Different Temperatures and Illuminations

An orthogonal experiment was conducted to investigate the effects of different concentrations of Ni2+,Cu2+,and Co2+,as well as different temperatures and light combinations,on seed germination features of Peganum harmala L and provide a basis for vegetation rehabilitation and ecological restoration in tail mining area.Results showed that low concentration of Ni2+,Cu2+,and Co2+ mixture solution was helpful to improve the Peganum harmala L germination potential,germination rate,and germination index and high concentration of the mixture solution showed significant inhibition.Peganum harmala L seedling growth was influenced by heavy metal ions concentration in the mixture solution in different extent,no matter the concentration was high or low.However,inhibiting effect of low concentration was not significant.In the treatment with 5 mg/L Ni2+,800 mg/L Cu2+,400 mg/L Co2+,25 ℃ temperature,and 12 h illumination,Peganum harmala L seeds germinated fast and germination rate was relatively high.Compared with different conditions,the optimum condition for Peganum harmala L seedling growth was found to be 100 mg/L Ni2+,100 mg/L Cu2+,50 mg/L Co2+,25 ℃ temperature,and 12 h illumination.