Study On Diversity Structure Characteristics Of Human Habitat Forest In Ancient Villages In Huizhou

China is in the midst of a wave of beautiful rural construction.Village human habitat forests are an important part of the construction of beautiful rural areas,and are attracting more and more attention.This article takes the ancient villages in Huizhou as a research area to conduct systematic research on village human habitat forests,which not only has important guiding significance and reference value for the construction of Huizhou rural areas,but also an important supplement to the rural landscape of Huizhou,but also to other rural areas in the country Construction has reference significance.In this study,the stratified sampling survey method was used to conduct field surveys on road forests,courtyard forests,fengshui forests,and recreational forests in ancient villages in Huizhou.Data analysis was conducted from two perspectives on the structure characteristics of village human habitat forests and tree species diversity.Structural characteristics include tree species characteristics,dominant species,application frequency,health status,diameter-level structure,and species diversity includes Patrick richness index,Simpson index,Shannon-Wiener diversity index,Pielou uniformity index.Through research,the following conclusions are drawn :(1)The research area belongs to the mountainous area of southern Anhui,and the village human habitat forests are relatively rich in composition,with 74 species,belonging to 43 families and 65 genera.The construction of habitat forest vegetation is dominated by trees,followed by shrubs,and flowers and vines are used less frequently.The dominant plant species are mainly osmanthus,tallow,monkey camphor,weeping willow,maple poplar,elm,holly,ginkgo,etc.It is mainly composed of three types: economic,ornamental,and production ecological dual-use types,with the production ecological dual-use type.(2)Due to the different functions of different types of human habitat forests,there are also differences in plant selection.The tree species with higher frequency of application are mainly osmanthus,tallow,monkey camphor,maple poplar,magnolia,weeping willow,ginkgo,elm,triangular maple,and so on,but with the advancement of the rural greening business,the application of plants has not only been Limited to native tree species,adaptable shrubs such as Sassafras tsumu and Haitong have also been introduced in large quantities.(3)The overall health status of the plant in the study area is excellent,and the trees are growing well.The plants are mostly in semi-mature and mature stages,and the agestructure tends to mature.The diameter of breast diameter basically shows regular changes,? > ?>?> ? > ?;the crown size of diameter does not show regular changes,but the number of trees and the number of trees show a positive correlation;from the distribution of different tree levels,15 m The distribution of the following tree species accounts for the vast majority,and the distribution of large tree species above 15 m is less than 20%.(4)The average value of the species richness index of human habitat forest in ancient villages in Huizhou is 4.92,and the average values of the Simpson index,Shannon-Wiener index,and Pieiou index are 0.75,1.40,and 0.91,respectively.However,there are characteristics that the single species is too strong,the tree age is too large,and the distribution is uneven.