广宁茶秆竹地上生物量分布特征研究

Study on Above-ground Biomass Allocation Characteristics of Pseudosasa amabilis

生物量作为生态系统研究的本底数据,是研究碳汇的基础,也是评价植物生长状况和生态系统功能的重要指标。特别是《联合国气候变化框架公约》及其《京都议定书》的形成,加速了国际社会森林碳交易进程,使碳汇与生物量研究成为当前的热点之一。竹类植物生物量的研究取得了一些进展,但关于生物量与碳汇关系研究起步较晚。

Based on the diameter,height and biomass of different organs of Pseudosasa amabilis,an individual optimization model is established.The results showed that the relationships among diameter,height,and biomass of different organs followed the power function model,rather than exponential model,linear model,or polynomial model.The biomass proportion of large diameter grade increased apparently after culm harvesting,and diameter was mainly distributed from 4 to 5 cm diameter grade.The standing biomass of cultivated Pseudosasa amabilis was between 48.10 t·hm^-2 and 53.10 t·hm^-2,while standing biomass of non cultivated P.amabilis stand was between 66.90—70.40 t·hm^-2,which is a suitable species for carbon sink.Bamboo individual biomass accounted for 70% of the above-ground biomass and grew multiply as the individual bamboo diameter increasing.The biomass of litter ranged from 8.32% to 18.10% in standing biomass while that of non cultivated bamboo stands was lower than that of cultivated bamboo.There existed a 1∶ 1 constant relationship between leaf biomass and branch biomass.