不同生境条件下羊草构件及羊草种群无性系分化

从不同生境条件下羊草种群的数量、分布格局、构件、无性系分化几个方面探讨了羊草种群的生态适应特征，得到如下结果：１）羊草种群数量及分布格局有随生境梯度改变而变化的趋势，以羊草群落中的羊草种群数量、株间距、分布格局类型最能反映羊草种群的生态适应特点；２）羊草的构件及无性系分化随生境条件的可塑性变化十分明显，其中以羊草群落中的羊草种群最具特殊性，根茎长、茎节数多、节间距大、根茎干物质积累多．

The Leymus chinensis Module and Clone Differentiation under Different Environmental Condition

It is explored to the ecological adaptive characteristic of Leymus chinensis population in several aspects:such as the amounts of population,the distribution pattern and the module and clonedifferentiation under different environmential condition. The results are as follows: 1)There arethe trends of changing about the amounts of Leymus chinensis population and their distributionpattern along the environmental gradient,especially those which are the amounts of Leymus chinensis population in the community of Leymus chinensis,their spacing in the rows and their typesof distribution patterns could reprent the ecological adaptive characteristic of Leymus chinensisproperly;2) The plasticity of clone differentiation of Leymus chinensis is varied distinetly underthe variation of environmental condition. The Leymus chinensis population is the community ofLeymus chinensis is the most characteristic: their rhizome is the longest, the numbers of theirstem,node is the most,the range between their node is the largest and the dry matter accumulation of rhizome is the largest.