The relationship between spatial structure and DBH of close-to-nature Phyllostachys edulis stands in Tianmu Mountain Growth Cycle of Phyllostachys edulis Stand in Tianmu Mountain Based on Spectrum Analysis Spatial Structure Optimizing Adjustment and Control Model of Phyllostachys edulis Stand Dynamic analysis of spatial structure in a close-to-nature Phyllostachys edulis stands Analysis of the spatial structure and competition with a Phyllostachys edulis standbased on an improved Hegyi model Relationship between Spatial Structure and Biomass of a Close-to-Nature Phyllostachys edulis Stand in Tianmu Mountain