Analysis on Community Characteristics of Endangered Plant Cercidiphyllum japonicum in Xiaolongshan Forest Region
The analysis of the community status of rare and endangered plants of Cercidiphyllum japonicum in the forest area of Xiaolongshgan was applied,a comprehensive evaluation was summarized on the community distribution of Cercidiphyllum japonicum in Xiaolongshan forest area.Totally a 30 m×50 m fixed plot was established in Xiaolongshan forest area by selecting Cercidiphyllum japonicum community.In this study,by using per-tree location survey data and stand status and management analysis software,which analyzing as follows:the forest spatial structure,forest age structure,forest growth,forest density,tree species dominance,tree health status,tree species composition,regeneration and tree species diversity of the endangered plant Cercidiphyllum japonicum in Xiaolongsha forest region.The results showed that:the q value of the community was 1.143 4,the angular scale was 0.513,the potential thinning density of the stand was 0.54,the crowding degree of the stand was 0.57,the tree species dominance of the stand was 0.05,the proportion of healthy trees was 91.5%,the number of stands was 1,and the Simpson index value of the stand was 0.84.Overall,the diameter distribution of the endangered plant community is not reasonable in Xiaolongshan forest region,and the diameter distribution of the community and population is multi-peak distribution,which is a typical incomplete different age forest.The random distribution of the community forest is an ideal horizontal pattern of natural forest.In the community,the dominant degree was low,and the value of the tree was next to that of Quercus aliena var.acuteserrata Maxim.The forest is divided into single-layer forest.Poor regeneration of stand;High diversity of tree species;The tree species in the forest are highly mixed,Quercus aliena var.acuteserrata Maxim has more large diameter trees,which is dominant in the stand,resulting in the forest being divided into mixed forests dominated by Quercus aliena var.acuteserrata Maxim.
Cercidiphyllum japonicumcommunity staterare and endangeredXiaolongshan forest region
NETL
NSTL
万方数据
