Research On The Landscape Application Of Fall-color Trees In Changsha

Fall-color trees is unique in many plant landscape materials as its variety of colors,many ornamental features,obvious effect of landscape seasonal change,and easy to consist landscape.Fall-color trees in urban green space landscape is the important embodiment of landscape characteristics,to carry out the fall-color trees survey and landscape evaluation work,could enrich and perfect the city autumn landscape,and form the city landscape characteristics.This paper selects 15 representative urban green spaces in Changsha as the research object,based on systematic investigation and research on the types of fall-color trees species,autumn leaf color phenology and landscape types,AHP was used to comprehensively evaluate the landscape of autumn leaves in 15 urban green areas.Through research,the following results are obtained:?)Through investigation,there are 80 kinds of fall-color trees were used in 15 urban green Spaces in Changsha,which are belonging to 39 families and 61 genera.Moreover,they can be classified as 55 kinds of trees,21 shrubs and 4 vines.There are 25 kinds of red leaves,11 kinds of orange leaves and 44 kinds of yellow leaves.They form eight types of plant landscape,such as solitary planting,opposite planting,linear planting,cluster planting,group planting,forest planting,hedgerow and vertical greening.?)From the aesthetic characteristics,ecological characteristics and service features,confirmed the evaluation index and constructed the comprehensive evaluation system of fall-color trees landcape in Changsha,combining qualitative analysis with quantitative analysis methods to evaluate 40 fall-color trees community,then sorting and grading of each community landscape quality.In the 40 samples which are selected,there were 3 plant communities of the level I landscape,accounting for 7.5% of the total.The plant community of level II landscape are 23,accounting for 57.5% of the total.There are 10 plant communities of level III landscape quality,accounting for 25% of the total.4 plant communities of level IV landscape quality,accounting for 10% of the total.Be rated as level I and level II of landscape is a total of 26,accounting for 65% of all samples,exclaim the overall quality of fall-color trees landscape in Changsha is good,but classical and excellentlandscape is still rare.?)through the investigation and analysis fall-color trees application in the gardens of Changsha city,combined with the comprehensive evaluation results of fall-color trees landscape,the problems arising from the fall-color trees in the application process: one is the fall-color trees diversity is low;Secondly,the resources of native tree species are not taken seriously;Thirdly,the biology and ecological characteristics of the fall-color trees were neglected;Fourth,the post-planting maintenance management needs to be consummated;Fifth,the cultural connotation of fall-color trees needs to be excavated.?)Several suggestions were proposed for the problems in the application of fall-color trees: Frist of all,increasing the species of fall-color trees;The second is to develop the native fall-color trees species and appropriatly bring in excellent foreign varieties;Thirdly,the plant configuration is carried out in a dynamic and developing way.Fourth,strengthen cultivation management and maintenance;Five is to carry out diversified activities to promote the fall-color trees.