科尔沁草原区通辽火电厂储灰池植被恢复过程中假苇拂子茅种群构件的年龄结构

通过果后营养期单位面积取样的方法,对科尔沁草原区火电厂储灰池植被恢复时间为12,8和5年区的假苇拂子茅种群构件年龄结构进行了研究。结果表明,1)不同恢复时间的3个植被恢复区分蘖株皆由3个龄级组成,分蘖株数量和生物量均呈增长型年龄结构,其中,植被恢复8年储灰池增长型年龄结构最为明显;随着龄级的升高,3个植被恢复区分蘖株干物质储量皆呈下降的趋势;同一龄级分蘖株的生产力随着恢复时间增加呈增加的趋势。2)不同恢复时间的3个植被恢复区根茎皆由4个龄级组成,1和2龄根茎长度和生物量占绝对比重,均为70%~80%;单位长度根茎干物质贮量均以2龄最高,4龄最低,而1龄变化差异较大;同一龄级根茎的物质储量随着恢复时间增加呈增加的趋势。各构件数量指标均具有较大的可塑性。

Age structure of modules of Calamagrostis pseudophragmites populations in the process of vegetative restoration of the coal ash storage pools of general firepower in the Kerqin grassland region

Age structure of modules of C.pseudophragmites populations were studied at the vegetative stage after fruiting in plots of 12,8 and 5 years vegetative restoration in the coal ash storage pools of general firepower in the Kerqin grassland region.There were three age classes of tillers,and numbers and biomass of the tillers were all of an increasing age structure.Storage of dry matter of the tillers decreased as age class increased.There were four age classes of rhizomes of which the 1st age and 2nd age class rhizomes were dominant(70%-80%).The highest storage of dry matter per unit length of the rhizomes was in the 2nd age class rhizome,while that of the 4th age class was the lowest.Each quantity index had a large plasticity.