亚热带中山地区草芦无性系种群的密度制约

Density dependence of Phalaris aruandinacea clonal population on middle mountain region of subtropical zone of China.

亚热带中山立地条件下草芦无性系种群密度制约的定量分析结果表明 ,不同生长时期草芦无性系种群的平均蘖重、平均蘖叶重和平均蘖茎重均随着密度的增加呈幂函数下降 .在开花期 ,种群的生殖生长已经受到种群的密度制约 ,营养蘖的生长不仅受到其密度制约 ,而且更大强度地受到种群的密度制约 .

The quantitative analysis on the density dependence of Phalaris arundinacea clonal population on middle mountain regions of subtropical zone of China shows that mean tiller weight, mean weight of leaves per tiller and mean stem weight per tiller are decreased in power function with the increase of population density at different growing stages. At flowering stage, the reproductive development is restricted by the population density, and the vegetative growth not only by the tiller density, but also strongly by the population density. The death rate of population is negatively correlated with its density at different growing stages.