【摘要】 以扁穗雀麦为供体,白三叶和红三叶为受体,采用培养皿滤纸法,研究扁穗雀麦茎叶和根提取液对受体种子萌发和幼苗生长的影响。结果表明,扁穗雀麦茎叶提取液对两种豆科牧草的发芽率有抑制作用,且随浓度的升高,抑制作用增强。25 g/L茎叶提取液的低浓度处理对两种三叶草的苗高有促进作用,且差异显著;所有提取液处理对其根长均表现为抑制作用。50 g/L根提取液对白三叶发芽率、苗高、根长均有较强的促进作用,但抑制红三叶的苗高和根长生长。各提取液对两豆科牧草幼苗鲜干重表现一致,均为抑制作用。同浓度处理下,白三叶对扁穗雀麦化感作用的敏感程度大于红三叶。更多还原

【Abstract】 The allelopathy of Bromus cartharticus Vahl on the seed germination and seedling growth of Trifolium repens and Trifolium pretense was studied by indoor Petri dish and filter paper bioassay.The results showed that the stem-leaf extract of Bromus cartharticus had inhibition on the germination percentage of two clovers.And with the concentration increased,the inhibition increased.25 g/L concentrations of stem-leaf extract could significantly promote seedling height.AU extract treatments inhibited root length.50 g/L concentrations of root extract had a strong role in promoting the germination,seeding height and root length of Trifolium repens,but inhibited the seeding height and root length of Trifolium pretense.The fresh and dry weights of the two clovers were inhibited.Trifolium repens was more sensitive to the allelopathy of Bromus cartharticus than Trifolium pretense in the same concentration of extract.更多还原