Study of Health Assessment in Daqingshan Natural Betula platyphylla forest

The present study was condueted by investigation and research in natural white birch forest of Dqing shan袁The method of composite structure function evaluation was selected considering the forest ecosystem structure and function. Meanwhile袁productivity渊P冤袁the organizational structure渊O冤 and interference 渊I冤 were selected as the comprehensive evaluation index to evaluate the health condition of Daqing shan natural forest ecosystem in the castle peak area and establish a corresponding forest health evaluation index system based on the theory of ecosystem health.