Shanghai Ancient Trees (Subsequent) Resources Present Situation Investigation And Analysis

Precious old trees are known as "green cultural relics",which are not only the green gem that can not be copied of the city,but also a ecological civilization witness.As of June 2017,there are 1613 strains of ancient trees and 1056 strains of ancient trees follow-up resourcesin Shanghai.The per ten thousand capital share of resources is just one,how to tap and protect the ancient resources of Shanghai is particularly important.The ancient tree resources in one area include two parts:in the book and the unlisted.First of all,this paper comprehensively surveyed the ancient tree resources in book and the followed-up resources in Shanghai,and analyzes in three aspects:total resources,age characteristics and tree species classification,There are 46 genera,81 families and 99 species in Shanghai ancient and famous trees,83 species of trees,14 species of shrubs,2 speci es of vine and take semi-quantitative evaluation of growth condition,the natural condition and the construction influence,to establish the AHP model of resources and comprehensive evaluation of tree growth potential.The results show that most of the ancient trees in Shanghai are adaptable to the natural conditions and the impact of human construction,but there are still differences.It is necessary to distinguish and set up different protected areas;Secondly also investigated the unregistered ancient trees resource in Shanghai's park,green space,street trees and so on,After investigation found that 1104 trees were 80a-99 a and 261 trees were over 100 a.The comparison of tree species classification and quantitative distribution of the two resources indicates that the unlisted resource has a great potential and highly overlapped with the classification of tree species.Shanghai's ancient tree is relatively backward in the urban areas of the country,but the set up of Shanghai's ancient trees follow-up resources,has made the ancient tree in Shanghai years in the prime of life,which has a great potential to grow.At the same time not registered way of transformation on resources is relatively single,changed the living environment,ancient trees and city construction projects had a greater influence on the growth of trees,also need to further strengthen scientific maintenance and management.For this reason,the author pointed out the strategy of urban ancient tree resource protection:carry out the identification of old tree resources,formulate a reasonable census interval,improve the old tree regulations,plan the source control construction projects,set up reasonable protected areas,strengthen technical research and carry out the protection of standardized management system of ancient trees and so on.