Landscape Comprehensive Evaluation Of Perennial Flowers In Hefei City And Its Application In Flower Border

With the improvement of people's living standard and the guidance of national policies,people's demand for the construction of conservation-oriented gardens is increasingly high.Perennial flowers is well-known for its good ornamental value,long green period,rich color and extensive management,etc.Perennial herb flowers are qualified to the needs of building conservation-oriented gardens,and they are worthy of research and application.At the same time,the perennial herb flowers are also suitable for the new type of green space,which is economical.In this paper,through a fuzzy comprehensive evaluation method on 135 varieties of perennial flowers commonly used in the floral environment and wild perennial flowers in Hefei city,and also based on the investigation of 35 Flower border samples in Hefei,the application of perennial flowers was studied,and after sorted out of the flowering-condition plant lists which were commonly used in Hefei,and acquire the following results:(1)Combine literature and expert opinions,the comprehensive evaluation system of perennial root flowers and plants can be divided into three subsystems,namely "ecological adaptability-Ornamentality of Plants-landscape application potential" composed of complex system,and established three layer of evaluation system,including 1 goal,3 standards,20 indexes.(2)The idea of determining index weight by analytic hierarchy process and entropy weight method was introduced respectively,and the advantages and disadvantages of the two methods were analyzed.Combining the advantages of the two methods,the improved idea of index weight calculation was proposed,and 135 kinds of perennial flowers were calculated.The results showed that the ornamental system(0.7500)the have the greatest impact on the landscape of perennial flowers,followed by the ecological adaptability subsystem(0.1450),and finally the landscape application potential subsystem(0.1051).This shows that ornamental and stress resistance should be the first consideration when selecting perennial flowers.From the perspective of index layer,the five indexes that have the greatest influence on the application of perennial root flowers are green period,flower color,length of flowering period,leaf color,leaf type and flower type,etc.,and the five indexes that have the least influence on the evaluation value are toxicity,application form,floral fragrance,acid resistance and diffusion speed.Therefore,when choosing suitable perennial flowers,we should first consider the green period,flower color,blooming duration,leaf color and leaf type of the plant.Under the same conditions,toxicity,application form,floral fragrance and other factors are considered finally.(3)Fuzzy comprehensive evaluation method was applied to evaluate the 135 varieties of perennial flowers,and the final results were divided into four grades under the guidance of experts.Class I:20 kinds,which are highly valuable in landscape application;Class II:50 species,with high application value in landscape architecture;There are 29kinds of grade III gardens with general application value and 36 kinds of grade IV gardens with poor application value.The evaluation results can provide reference for the introduction,breeding and application of perennial flowers in the future.(4)A survey was conducted on 35 Flower border sample sites in Hefei city.The top five dominant plants in flowerbed applied plants in Hefei city were Compositae,with 27 species in total,accounting for 13.7%of the total plant applied species.Gramineae,a total of 16 species,accounting for 8.2%of the total applied plant species;Labiaceae,with 12 species,accounting for 6.1%of the total plant species.Liliaceae,a total of 11 species,accounting for 5.6%of the total plant species.Rosaceae,9 species,4.6%of total plant species.From the perspective of plant use,perennial flowers have the highest proportion up to 42%of application due to good landscape effects,flower shrub is second,just 21%,as a background,the tree accounts for 13%;the proportion of ornamental grass and annual and biennial flower is the lowest,accounting for only 12%.The top four dominant species of perennial plants used in the flower environment of Hefei City are Compositae,Liliaceae,Iris,and Labiatae.The results of this survey are basically consistent with the evaluation results,which further proves the feasibility of the evaluation method and the scientific nature of the evaluation results.