管理对华灰早熟禾生物量及株高分形关系的影响

Effect of Management on the Fractal Relation Between Biomass and Height of Poa botryoides

在河北省围场县红松洼草原生态系统自然保护区研究管理条件对华灰早熟禾地上生物量与株高分形关系的影响。结果表明 ,华灰早熟禾生物量的积累规律具有自相似性特征。梯度生长是华灰早熟禾生物量积累的规律。在实验区 ,生物量与株高的分形关系在生长季节存在明显的差异 ,表明放牧压能增加华灰早熟禾生物量积累规律的复杂性。缓冲区每年割草 1次对华灰早熟禾生物量和株高分形关系没有影响。

By the use of methods of fractal geometry,the relation between aboveground biomass and height of Poa botryoides population were studied under the different managements in Hongsongwa Grassland Natural Reserve of China.The results show as follows:1)at any moment, the individuals of Poa botryoides population were similar each other in the accumulative rate of biomass;2)the increase of gradient is the law of accumulation of biomass of Poa botryoides population;3)during the growing season,the heterogeneity of biomass accumulation is obvious in experiment area,which indicates that graxing pressure can increase the complications of the fractal relation between biomass and height of that population;4)in buffer area,if grass is cutted once each year,the accumulative rate of biomass in that population do not be affected.