Comparison And Evaluation Of Spatial Structure Of Woody Plants For Hohhot Five Residential Green Spaces

The purpose of the thesis was to study the Spatial Structure of woody plants in the Tree Species Composition, the Horizontal Structure, the Vertical Structure and the Tree Species Composition Structure, Taking the residential green areas of Fang Ting(F),Qiao Hua(Q),Ming Shi-yuan(M),Dong Le(D) and the east area of Inner Mongolia Agricultural University(N) as the main research objects.The main results are as follows:1. The Tree Species Composition of the study green areas: There were 80 Plants species,which belonged to 43 genera and 22 families of vascular plants in the study green areas. There were 12 Plants Species,which belonged to 6 genera and 3 families of Gymnosperm, and 68 Plants Species,which belonged to 37 genera and 19 families of Angiosperms.There were 53 arbor species,27 shrub species according to 2 life types. There were 30 Plants Species,which belonged to 22 genera and 13 families of Native plants, and 50 Plants Species,which belonged to 32 genera and 18 families of Exotic species.The characteristics tendency of species focused on big subjects of the Rosaceae, Leguminosae, Pinaceae, Oleaceae, and scattered small branches and single species branches.shrub species and native trees were few, and deciduous and broad-leaved species had absolute advantage.2.The Horizontal Structure of the study green areas: Plant densities were in 435 ~ 1508 trees/hm2 and more reasonable.The values of Aggregation index R were between 1.2435 ~ 1.5731, indicating that plants were uniformly distributed.Coverage degrees were in 0.3814 ~ 0.6279, coverage degrees of F, D and N were larger, plant communities were slightly messy, and should pay attention to pruning plants timely.3. The Vertical Structure of the study green areas: The rates of Arbor, Shrub and Grass were unreasonable,and the number of shrubs were few Significantly.The values of stand level rate were in 0.3629～0.5345,the order of plants Spatial effect were Q﹥F﹥M﹥D﹥N.4.Tree Species Composition Structure of the study green areas: The rates of Evergreen and Deciduous were 1:3.6～1:9, and the proportions were low. R values were 2.6977～4.8208, H values were 1.9208～2.8024, J values were 0.8342～0.9696, M values were 0.0657～0.2126. The results show that tree species richness, diversity, and evenness of F were best and them of N and M were more relative poor. Tree species monotony of F was lowest and them of M and N were higher. Correlation analysis showed that there was a positive correlation between H and R, H and J and J and R, and a negative correlation between H and M, M and J and M and R.5.Comprehensive Evaluation method of the spatial structure used the methods of Membership function and Superposition method to sort indicators, the results show that: The Horizontal Structure of M and Q were better than the other three study areas, the Horizontal Structure of M,Q and F were better than the other two study areas, the order of Tree Species Composition Structure was M﹤N﹤D﹤Q﹤F. The order from weak to strong of patial structure was N﹤D﹤M﹤Q and F.