| This paper takes two typical forest Q. aliena var. acuteserrata and B.albo-sinensis as the object of the research, This paper determined stand parameters such as the tree height,diameter, basal area, and the coordinate of each tree. The study described the spatial structural characteristics using mingling degree, neighborhood comparison and uniform angle index.Single tree selection cutting measure was used to adjust the structure of the stand. The main research results include the following:(1) The main spatial structure of two typical forest Q. aliena var. acuteserrata was random distribution because of the number of uniform angel index higher than 0.5 of individual tree over 50%(2) The proportion of five different tree differentiation classes all about 20%, there was a higher differentiation class of Q. aliena var. acuteserrata and B.albo-sinensis community. The number of dominant tree on the sunny slope was higher than the shady slope.(3) The mingling of trees mostly presented moderate or high, based on the proportion was84%and 73% of mingling over 0.5 on the sunny slope and the shady slope. The plots of B.albo-sinensis mingling values are about 20%. In the points in the red birch, trees are weakly basic degree in Nurse. Mixed poor condition red birch points lower degree of aggregation. In addition to red birch, the weak proportion of other species mixed low and high intensity, high intensity mixed ratio. Above all, B.albo-sinensis secondary forest had low aggregation degree,good mingling degree, higher differentiation, and significantly population abundance, the whole forest in a relatively stable state.( 4) Except for a few trees,,the uniform angel index was the same of the Q. aliena var.acuteserrata and the whole forest on of all the slope of Q. aliena var. acuteserrata community.(5)the highest uniform angel index of different slope appear different DBH, compared with the sunny slope,shady slope individual low number of trees, basal srea is largeresulting in the maximum slope. |
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