Study on the Forest Ecosystem Health Assessment and Control Mechanism of Pinus Tabulaeformis Forest in Badaling;

The structure of crust and upper mantle was obtained in Badaling and its neighborhood.

The basic idea and the matematic principle of classification of rook massquality for Badaling area are presented in this paper.

Study on Structure of Broad-leave Secondary Forest and Health Management in Badaling Forest Center;

Community Structure-Diversity Index Model was first put forward through studies of 16 fixed plots in forest health experimental area,Badaling Forest Center,and forest health rating was drawn up on community structure and species diversity level(CSDI):>15.

According to the law of different forest stand can arise different forest fire,based on the existing forest distribution at the Badaling forestry center,the area percentage of different forest types,forest age,crown density and slope for each sub—compartment were analyzed,and based on the different characteristics of each sub—compartment,some rational methods of fire prevention were put forward.

Forestry Health Management in Badaling Forest Farm of Beijing City;

Forest Health Assessment in Badaling Forest Farm of Beijing;

5 hm2 sample plot of Betula davurica natural secondary forest in Badaling Forest Farm of Beijing in June of 2006,the method of point pattern analysis was employed to study the spatial distribution patterns of tree populations and the relationship of main populations of community and individuals in different age classes of B.