长白山区4种丛型禾草地上生物量生殖分配研究

目的]研究4种丛型禾草地上生物量的生殖分配。方法]以长白山区的4种丛型禾草：草地早熟禾（Poa pratensis）、垂穗披碱草（Elymus sibiricus）、华北翦股颖（Agrostis clavata）和鹅观草（Roeqneria kamojiowi）为研究对象,计算各种群营养枝和生殖枝构件生物量占地上总生物量的百分比。结果]4种丛型禾草生殖枝生物量的分配比例较高,基本都在85%以上。在生殖枝构件中,生殖枝茎杆生物量的生殖分配比例较大（75%~90%）,说明这4种丛型禾草主要是以地面下茎基部分蘖出新个体进行无性生殖。结论]初步揭示了丛型禾草地上总生物量生殖分配的一般规律,为植物生殖生态学以及草地的合理利用和科学管理提供理论依据。

Study on the Reproductive Allocation of Four Kinds of Cluster-type Grass Ground Biomass in Changbai Mountain

Objective] The research aimed to study the reproductive allocation of four kinds of cluster-type grass ground biomass.Method] The four kinds of cluster-type grass which were Poa pratensis,Elymus sibiricus,Agrostis clavata and Roeqneria kamojiowi in Changbai Mountain were the research objects.The proportions of vegetative shoot and reproductive shoot component biomass to total ground biomass in every population were counted.Result] The allocation proportions of four kinds of cluster-type grass reproductive shoot biomass were higher and were basically above 85%.In the components of reproductive shoot,the reproductive allocation proportion of reproductive shoot stem biomass was greater(75%-90%),which illustrated that the four kinds of cluster-type grass done the asexual reproduction by generating the new one from the stem base under the ground.Conclusion] The general rule of ground total biomass reproductive allocation of cluster-type grass was initially revealed,which provided the theory basis for the plant reproductive ecology,the reasonable utilization and scientific management of lawn.