Analysis On The Present Situation And Protection Countermeasures Of Ancient And Famous Trees Resources In Jinzhai County

Ancient and famous trees resources are not only an important part of natural ecology,but also a typical representative of urban development and cultural history.As natural plants,ancient and famous trees have gone through thousands of years,and their strong vitality and indomitable character make people awe.In addition,ancient and famous trees are also excellent gene pool of germplasm resources and the essence of forest resources,which have high ecological value,cultural landscape value and scientific research value.Therefore,the protection of ancient and famous trees is of great significance to improve the stability of ecosystem and the sustainable development of urban ecology.Taking the ancient and famous trees resources in Jinzhai County as the research object,this paper analyzes the resource status,health status,comprehensive value and protection and utilization status of ancient and famous trees based on the survey results and field investigation,and then puts forward specific protection suggestions to provide reference for the protection and development of ancient and famous trees in Jinzhai County.The main research results are as follows:(1)At present,there are 2969 ancient and famous trees in Jinzhai County,belonging to75 species,55 genera and 33 families,among which 36 are first-grade ancient trees,accounting for 1.21% of the total trees.257 secondary ancient trees,accounting for 8.66%of the total number of trees;2670 third-grade ancient trees,accounting for 89.93% of the total tree number;6 famous trees,accounting for 0.20% of the total trees.According to ShannonWeiner index,evenness index and dominance index,the ancient trees in Jinzhai County are rich in tree structure types and relatively uniform in species distribution,and the ancient trees of Quercus variabilis in Fagaceae have certain advantages.The number of ancient trees in different towns is not the same and shows spatial aggregation characteristics in a certain range.These ancient trees mainly grow in the outer suburbs.(2)There were 2847 normal trees,accounting for 95.89% of the total number of trees.There were 85 weak strains,accounting for 2.86% of the total number of plants.There were 7 endangered strains,accounting for 0.24% of the total number.There were 30 dead strains,accounting for 1.01% of the total.The factors affecting the health of ancient trees include their own physiological factors,natural factors and human factors.Among them,the health status caused by the changes of their own physiological factors has a greater impact on the first-level ancient trees.The natural factors include natural disasters and pests and diseases.Human factors include hardening of the ground,illegal construction,garbage dumping,and rope nailing.(3)According to the value evaluation method of ancient and famous trees,the basic value of ancient and famous trees in Jinzhai County is 16.4746 million yuan,and the comprehensive value is 234.9779 million yuan,which is 14.26 times of the basic value.Among them,the ecological value,cultural value and scientific research value of tree age are 27.2380 million yuan.The ecological value and landscape value of crown width and tree height were 121.1886 million yuan.The landscape value and ecological value of the growth location are 18.8271 million yuan.The protection level contains a rare value of51.2496 million yuan.(4)The following problems are mainly found in the protection and utilization of ancient and famous trees: backward protection consciousness,insufficient implementation of management responsibility,contradiction between protection management and development and utilization,and lack of professional personnel.Suggestions for the present situation of ancient and famous trees are as follows: raising the awareness of protection,carrying out the responsibility of protection,rational development and utilization,tapping the potential of resources and strengthening technical research.