Comprehensive Evaluation Of Landscape Value Of The Ornamental Cerasus' Germplasm Resources And Optimization Application In The Main City Of Nanjing

Ornamental Cerasus belong to Rosaceae family Cerasus genus.They contain ornamental flowering or fruit-bearing and wild resources.Ornamental Cerasus are the main ornamental plants in Spring,which come from China.Ornamental Cerasus are widely used in the green space in urban and rural areas of our country.The current research mainly focuses on resource innovation,propagation and cultivation,and construction of special class garden,however,studies on comprehensive landscape value evaluation of ornamental Cerasus landscape value is involved little everywhere.The comprehensive landscape value evaluation of the research is based on the 22 ornamental Cerasus germplasm resources in Nanjing which include ecological,ornamental,social and cultural,and economic value,which carried out from 2014 to 2015.This study will contribute to the landscape plants application of ornamental Cerasus,and provide reference for the construction of ecological space in modern urban environment.Conclusions of each research are listed as follow:(1)The establishment of comprehensive landscape value evaluation system of germplasm resources of the Ornamental Cerasus and the weight of indexes for evaluation:Analytic Hierarchy Process(AHP)is used to establish the comprehensive landscape value evaluation system for ornamental Cerasus,.The weight orders of the criterion level are ecological value>ornamental value>economic value>social and cultural values.The ecological value weights 0.4801,nearly half of the total weight,which is the main research content of the research.Followed by the ecological value,is the ornamental value,which is the main indicator of the evaluation of the appearance of the ornamental Cerasus.The social and cultural value is lower than the economic value,accounts for the smallest in the criterion layer.The index level contains 18 specific evaluation factors which is representative in comprehensive landscape value evaluation of the ornamental Cerasus.The sort orders on factor weights for the index level are carbon sequestration>oxygen release>reproduction>cooling>amount of flowers>corolla>adaptability>cultural connotation>humidification>florescence>WUE>scientific value>fragrance>medicinal health value>seasonal change=morphology>application types>educational value.In the index level,carbon sequestration,oxygen release,reproduction and cooling weight larger than others,weighting above 0.07,which are main influence factors of comprehensive landscape value evaluation of the ornamental Cerasus.Application types and educational value less affected factors based on the research.(2)Evaluation result of comprehensive landscape value of the ornamental Cerasus:Through evaluation and analysis,the sort on the 22 resources are C.serrulata var.lannesiana'Albo-rosea'>C.yedoensis(Matsum.)Yu et Li>C.×kanzakura cv.Tairyo-zakura>C.subhirtella 'Pendula'>C.serrulata var.lannesiana 'Sekiyama'>C.glandulosa>C.serrulata var.lannesiana 'Hongye'>C.subhirtella 'Plena Rosea'>C.serrulata>C.serrulata var.lannesiana 'Chrysanthemoides'>C.lannesiana Beni-yutaka>C.jamasakura 'Ichihara'>C.pseudocerasus'Intxorsa'>C.pseudocerasus>C.lannesiana 'Taihaku'>C.lannesiana'Hanagasa'>C.serrulata var.lannesiana 'Luo Fumei'>C.discoidea>C.campanulata(Maxim.)Yu et Li>C.serrulata var.lannesiana 'Superba'>C.serrulata var.lannesiana'Speciosa'>C.×kanzakura 'Praecox'.According to the final results,the germplasm resources of ornamental Cerasus are arranged as high(?),relatively high(?)and general(?)for 3 grades.There are four high ornamental Cerasus,high ratio 18%;eleven relatively high ornamental Cerasus,relatively high ratio 50%;seven general ornamental Cerasus,general ratio 32%;no low or relatively low grades.Among the 22 germplasm resources of ornamental Cerasus,C.serrula var.lannesiana 'Albo-rosea',C.yedoensis(Matsum.)Yu et Li,C.×kanzakura cv.Tairyo-zakura,C.subhirtella'Pendula',C.serrulata var.lannesiana 'Sekiyama',C.glandulosa,C.serrulata varn lannesiana 'Hongye' and C.subhirtella 'Plena Rosea' weight higher comprehensive value,which can be widely applied in the modern environment of garden green space.