Study on the Spatial Pattern of Juglans mandshurica and Its Spatial Correlation with Accompanying Speeies in Changbai Mountain

[Objective] To investigate the changes of spatial pattern of Juglans mandshurica and main accompanying speeies in different growth stages and the changes of spatial correlation between them,as providing theoretical guidance in the process of forest management.[Method]This research uses the method of point pattern of the Ripley 'K function,studing on the spatial distribution pattern and spatial correlation of species. [Result]At the age of juvenile Juglans mandshurica forest,there is interaction among poplar seedlings,amur corktree seedlings and Juglans mandshurica seedlings,it is bad for the growth of Juglans mandshurica in the regeneration layer. At middle-aged Juglans mandshurica forest,poplar and big tree of mongolia oak and linden that growing nearby Juglans mandshurica should be cut,the amur corktree that keep a certain distance from Juglans mandshurica may be retained. At near-mature Juglans mandshurica forest,big tree of mongolia oak,poplar and amur corktree should be cut,linden tree can be moderately retained. [Conclusion] In different stages of Juglans mandshurica growth as far as cutting the broad-leaved trees which is no good for Juglans mandshurica growth,tending at the right time,adjusting community structure reasonably.