【摘要】 研究了老芒麦、披碱草两种禾本科披碱草属牧草种子的吸水特性,及在吸湿-回干处理下不同温度和不同处理的萌发情况。结果表明:老芒麦和披碱草发芽率、发芽速度和发芽整齐度均在25℃下最高。老芒麦在吸水达最高吸水率50%发芽率和发芽速度最高,披碱草在吸水达最高吸水率100%发芽速度最高,30%的发芽率最高,发芽的整齐度均为对照最高。经吸湿-回干处理后,种子在35℃和40~25℃高温逆境下的活力表现有明显差异。表明老芒麦和披碱草种子经吸湿-回处理后有利于抗高温能力的提高。更多还原

【Abstract】 Water absorption behaviours and germination performances of Elymus sibiricus and Elymus dahuricus seeds under different temperatures with hydration-dehydration treatments were probed.The results show:Germination percentage、germination speed and uniformity of Elymu sibiricus and Elymus dahuricus seeds are highest under 25 ℃.Highest germination percentage and germination speed are achieved with the hydration-dehydration treatments under 50% of imbibition for Elymu sibiricus seed.Highest germination percentage is achieved with 30% imbibiton and highest germination speed is achieved with 100% imbibition for Elymus dahuricus seed.Highest germination uniformities are achieved with untrerated seeds for both the two species.Hydration-dehydration treatments have profound effects on seed tolerance to high temperatures in terms of seed vigour level under 35 ℃ and 40-25 ℃germination conditions for both the two species.更多还原