赣中亚热带森林植被碳储量

The carbon storage of the subtropical forest vegetation in central Jiangxi Province

利用已发表的乔木生物量回归模型(乔木层)和样方收获法(灌木层、草本层),沿江西省泰和县灌溪乡千烟洲至井冈山市大井林场一线,采用样带法研究了赣中地区亚热带湿润气候下的植被群落碳储量及其分配规律。研究结果表明:群落碳储量绝大部分集中于乔木层。乔木层单位面积碳储量与乔木密度的幂指数为-0.0756。碳储量的空间变化规律表现为植被的碳密度与经度之间没有显著的相关性,而与纬度和海拔间均存在着显著的相关关系,表现为随着纬度和海拔增加植被碳密度递减。各层片的碳密度与其Shannon-Wiener物种多样性指数之间没有显著的相关关系。

We investigated the vegetative carbon storage, its distributional pattern and relevant ecological issues in subtropical forests of the Central Jiangxi Province by transect-sampling method, with the help of the published allometric biomass models for trees and the harvesting method for shrubs and herbs. We sampled from the Qianyanzhou, Guanxi Village, Taihe County, Jiangxi Province to the Dajing Forestry Centre of the Jinggangshan City. The results showed that the most part of the carbon storage of a stand was allocated to tree layer and the carbon storage per unit area of tree layer scaled as the -0.0756 power of the tree density along the sampled transect. The carbon density of vegetation decreased linearly with increasing latitude, and so with increasing altitude in stands. There were no significant correlations between the carbon density and the Shannon-Wiener Species diversity index for each layer of stands.