The Study And Application Of Health Assessment Index System For Betula Platyphylla Forest In Daqing Mountain Of Inner Mongolia.

Betula platyphylla forest is the main natural tree forests in Daqing Mountain of Inner Mongolia, on the ecological protection Daqing Mountain of Inner Mongolia play a dominant role, through investigation and research to Betula platyphylla forest in Daqing Mountain of Inner Mongolia, guide by health assessment of forest ecosystem,from the propoties of nature, the organizational structure and interference from the outside,and choose each index and correlation content which can show the health state of Daqing Mountain of Inner Mongolia,to establish of Betula platyphylla forest Health in Daqing Mountain of Inner Mongolia. After establishing the Synthetic Assessment System, use the mathod of the Analytical Hierarchy Process(AHP) to get the proportion of every quotas,then through the health assessment of forest ecosystem and investigation data of every places.In the end, the Betula platyphylla forest health statewas divided into such five grades as excellent, healthy, sub-healthy,unhealthy and morbid, which made the foundation of case study next step of the Betula platyphylla forest in Daqing Mountain of Inner Mongolia.Paper evaluates health status for different ages Betula platyphylla forests of Daqing Mountain of Inner Mongolia and gets the following results:1,The average of a comprehensive health index of five young Betula platyphylla forest small classes is 0.57, it is in the sub-health state.2,The average of a comprehensive health index of five Betula platyphylla forest small classes is in the range of 0.59 to 0.72, the average of comprehensive health index is 0.65 , it is in the sub-health state.3,The average of a comprehensive health index of five nearly mature Betula platyphylla forest small classes is 0.72, it is in a healthy state. The results of the average size of forest health index in chronological order: nearly mature forest> middle-aged forest> young forest.Finally, based on the evaluation results, propose the preliminary health management plan. For Betula platyphylla forest of more poor health index, proper measures should be taken to the forest .For example, thinning and protection, and so on.