美国五种灌木种实形态特征及其萌发特性的初步研究

采用常规的水浸催芽方法,对引自美国的5种共7个种源的灌木树种种实的萌发特性进行了初步研究。对水浸催芽不易萌发的种实再采取其它催芽方法进行实验。结果表明:黑油脂木(Sarcoba tusverm icula tus)和沙生胶兔木(Chrysotham nus nauseosus ssp.turbina tus)的果实特别容易萌发,采用常规水浸处理即可得到较高的发芽率;不作任何处理即进行直播,其出苗率也很高;而四翅滨藜(Atriplex canescens)、巨四翅滨藜(A.canescens ssp.gigan tea)、三齿滨藜(Atriplex.triden ta ta)和内华达麻黄(Ephedranevadensis)的种实,常规水浸处理发芽率很低,通过混沙催芽、层积催芽等方法可以提高种实的发芽率和出苗率。

The Elementary Research on the Morphology and Germination Trait of the Seeds or Fruits of Five American Bush Species

In this paper,adopting common saturation germination trial in lab conditions,a research was made on the seeds or fruits of five bush species(seven sources) which introduced from America.We took other measures if the seed dormancy could be not broken in routine conditions.The result shows that we can get both high germination rate and survival seedling rate routine method of Sarcobatus vermiculatus and Chrysothamnus nauseosus ssp.turbinatus.However,the fruits or seeds of Atriplex canescens,A.canescens ssp.gigantean,A.tridentate and Ephedra nevadensis were difficult to germinate.We could not get high germination rate by saturation progress in lab conditions.We could break dormancy by seed stratification,or some other ways.