INTERSPECIFIC ASSOCIATION AND CORRELATION OF SHRUB LAYER IN THE CONIFEROUS BROAD LEAVED MIXED GEOBOTANICAL ZONE OF RUSSIA PLAIN
俄罗斯平原针阔混交林群落的灌木层植物种间相关研究

The abundant shrub species,obvious stratifications and complex shrub layer structures,which are the most outstanding characteristics in the coniferous broad mixed forest in the Russia plain. X 2 and r formulae are used on studying the interspecific association and correlation of shrub layer.Based on analytical results of X 2 and r formulae,plants of shrub layer can be divided to 4 ecological species groups: Cytisus fish Juniperus communis,Fraxinus excelsior Ulmus laveuis,Euonymus verrusonca Vibunum opulus Lonicera xylosteum Corylus avellana and Ribes migrum Padus racemosa Alnus glutinosa. This kind of classificaton will provide an important theory basis on studying structure and dynamics of forestry community,and vegetation recover and restoration.