通辽火电厂储灰池植被恢复过程中赖草种群构件的年龄结构(简报)

Age structure of population modules of Leymus secalimus in the process of the vegetative restoration in storage pools of coal ash in General Firepower Plant,Tongliao

赖草是科尔沁草原区沙质土壤生境广泛生长的优良禾草,是典型的无性系植物.在内蒙古科尔沁草原区,赖草的分蘖节和根茎均可存活4个年度.在8月中旬,经历了11～12年植被恢复的储灰池中,赖草种群的根茎是由4个龄级组成, 4～5年植被恢复的储灰池则由3个龄级组成.2个样地赖草无性系种群的分蘖株均由2个龄级组成,均为增长型的年龄结构,恢复的时间越短,其增长型结构就越明显.

Leyrnus secalirnus, a species of a typical clonal plant, is distributed widely across the sandy soil of the Kerqin steppe region. The tiller nodes and the rhizomes of L. secalimus can live for up to 4 years in the Kerqin steppe region of Inner Mongolia. In this study which was conducted during the middle ten days of August, the rhizomes of the clonal population consisted of four age classes in a 11--12 years vegetative restoration plot, and three age classes in a 4--5 years vegetative restoration plot. The tillers of the populations consisted of two age classes, which showed expanding age structure. A shorter restoration time was more obvious in the expanding age structure in the two plots.