The Study on Component Biomass and Its Distribution Characteristics of Guangxi Unique Traditional Chinese Medicine Calophyllum membranaceum
Objective:To investigate the component biomass and its distribution characteristics of Calophyllum membranaceum,a unique traditional Chinese medicine in Guangxi,and to deeply understand the growth characteristics of plants,so as to provide a theoretical basis for the subsequent large-scale breeding.Methods:Based on plant specimens information and relevant literature review,10 survey points which covering 8 cities and counties were set up in Guangxi to conduct the resource distribution of Calophyllum membranaceum.In each survey point,more than 3 whole plants were randomly selected and whole-plant harvest method was used to obtain plant growth indexes and biomass data.The relationship between plant organ biomass distribution and geographical and growth factors was explored at the individual level,and the growth indexes differences between wild plants and cultivated plants were compared.Results:Statistical analysis of the data from the resource survey revealed that the wild populations of Calophyllum membranaceum showed a sporadic distribution pattern and mostly grew in the lower part of the forest stand;compared with the cultivated plants,the averaged age,averaged ground diameter,averaged plant height,averaged total biomass of Calophyllum membranaceum were respectively(14.47±1.74)a,(8.28±0.53)mm,(75.68±5.10)cm,and(43.31±5.96)g.The above growth indexes were much lower than those of the cultivated plants;in terms of biomass allocation characteristics,the plant stem biomass was the largest(56.48±18.79)g,and the stem mass ratio was more than 35％,while the difference between leaf mass ratio and root mass ratio was not significant.By analyzing the effects of geographic environmental factors and plant growth parameters on biomass allocation,it was found that the root shoot ratio was significantly positively correlated with altitude,the root biomass fraction was significantly negatively correlated with plant height,the stem biomass fraction was significantly positively correlated with latitude,ground diameter,plant height and age,and the leaf biomass fraction was significantly negatively correlated with the other five factors except altitude.The overall explanatory power of geographical factors on biomass allocation was 23.2％,slightly higher than growth parameters(19.6％).Conclusion:Calophyllum membranaceum populations are widely distributed in Guangxi,the plant growth is stable,but the total resources are gradually decreased.There are significant spatial geographical differences in component biomass and its allocation.The biomass allocation is influenced by others factors besides geographical factors and growth factors.
Calophyllum membranaceumiomass allocationgrowing characteristicsresource distributionroot-shoot ratio
NETL
NSTL
万方数据
