Abstract: Based on essential community features and field investigations,his paper discussed the physiognomy,floristic composition,quantitative characters and vertical structure of the Tilia-Korean pine forest.Profile of vertical structure was drawn by further analysing its physiognomy such as first-branch height,crown scope etc. It provided theoretical basis for further research on broadleaved korean pine forest community and biodiversity protection and scientific methods for forest management and long-term development.

Key words: continuous cropping of potato, PCR-DGGE, fungal population structure, root physiological activity, tuber yield.