高羊茅属4个品种萌发期耐盐能力的研究

以NaCl为胁迫因子，设置质量分数0、0.2%、0.4%、0.6%、0.8%、1.0% 6个盐分梯度，对4个高羊茅（Festuca arundinacea)品种在萌发期进行盐胁迫处理，分别观测盐溶液对相对发芽率、相对发芽势、根/茎、根长相对降低率等萌发指标的影响。结果表明，各品种相对发芽率、相对发芽势、根/茎随盐质量分数的增加而降低，根长相对降低率随盐质量分数的增加而升高。综合评比表明，凌志耐盐性最强，爱瑞3耐盐性最弱。

Evaluation of salt tolerance of four Festuca arundinacea varieties during seed germination stage

Seeds of four Festuca arundinacea varieties (Barlexas, Arid 3, Jaguar 3 And Red Elephant) germinated under the stress of 0, 0.2%, 0.4%, 0.6%, 0.8%, 1.0% NaCl solutions. The relative germination percentage, the relative germination potential, the ratio of root to seedling and relative reduction percentage of root length were measured during the germination stage. The results of this study showed that the relative germination percentage, relative germination potential and the ratio of root to seedling of four varieties declined with rising salt concentrations, while the relative reduction percentage of root length increased. The results of comprehensive evaluation showed that Barlexas was the most salt tolerant variety, but Arid 3 was the weakest one among four varieties.