野生北柴胡根资源量与地上植株形态关系研究

以2007年北京东灵山300株野生北柴胡（Bupleurum chinense）植株形态因子和根资源量实测数据为基础，采用方差分析与模型模拟等方法对3种典型生境下北柴胡根资源量与地上植株形态因子之间关系进行了模拟研究。结果表明：①不同生境类型下，株高和叶片数平均值表现出相同的变化规律，即：林地>灌丛>草甸，而分枝数表现出相反的变化规律；②方差分析结果表明，不同生境类型下植株地上形态特征株高、叶片数和分枝数差异性显著；③所选3种模型对根资源量（Y）与株高（x₁），叶片数（x₂）和分枝数（x₃）之间关系模拟效果排序为，广义可加模型（GAM）>广义线性模型（GLM）>多元线性模型（MLM），最优模拟结果R²可达0.90以上，且分生境模拟结果优于混合模拟结果；④实测值对最优模型检验结果表明，以95％的可靠性估计，GAM模型对北柴胡根资源量的预估精度均在75％以上。

Quantitative Analysis and Simulation of the Relationship between Resource Allocation of Root and Plant Aboveground Morphologic Features of the Wild Bupleurum Chinense

The Bupleurum chinense root is used as herbal medicine. Resource allocation of the root is the key parameter to reflect the amount of resources. Research on the relationship between the resource allocation of Bupleurum chinense root and morphologic features is of great significance. On the one hand, it can provide case study for the relationship between the aboveground morphologic features and the underground resource accumulation of perennial herbs. On the other hand, it can not only contribute to the calculation of resource allocation of root by judging from the aboveground morphologic features, but also accurately assess its reserves without sacrificing wildlife resources, providing a scientific basis for production estimation of herbal medicine plants resources in China. Based on a field experiment on 300 wild plants of the Bupleurum chinense on Dongling Mountain in 2007, we make a analytical comparison of the morphologic features in different habitat types and a relationship simulation between resource allocation of root and 3 aboveground morphologic features. The results show that: 1) The average number of leaves and plant height among three different habitat types show the same changing pattern, which is woodland> shrub> meadow, while the number of branches show the contrary changes; 2) The ANOVA test results indicate plant morphology variances, including leaf number, branch number and plant height, of the three habitat types is statistically significant; 3) Three different models, multiple linear model(MLM), generalized linear model (GLM) and generalized additive model (GAM) are used to simulate the relationship between resource allocation of root and plant height, leaf number and shoot number of the three different habitat types. The results show that the accuracy sequence of these models are GAM> GLM> MLM, and single habitat models are more accurate than the mixed models; 4) The model test results show that with 95% as the reliability estimation, results accuracy of GAM model are all above 75%. In conclusion, the model can not only provide the basis for the evaluation and accurate assessment of the wild Bupleurum chinense reserves and regional resources assessment and calculation, but also it can be a good way for the evaluation and accurate assessment of other herbal plants in China.