Study On The Application Of Rosaceae In Urban Green Space System Of Dezhou City

There are more than 3,300 species of Rosaceae in 124 genera all over the world,mainly distributed in the north temperate zone.In China,there are more than 1,000 species in 51 genera,distributed all over the country.Rosaceae plants have strong adaptability,high ornamental value and good landscape effect,so they have been widely used in ancient and modern gardens at home and abroad,and are popular ornamental plants and fruit plants.Dezhou City is located in the northwest of Shandong Province,the lower reaches of the Yellow River north bank,is located in the north temperate zone.The natural conditions in Dezhou City are superior,with four distinct seasons,long and strong sunshine duration,and the sunshine duration is mostly concentrated in the spring when rose plants grow and develop.Therefore,Dezhou City has unique natural conditions for the growth and development of rose plants.This research through the way of literature research and field visit investigation,summarized Dezhou City center of commonly used Rosaceae plant resources,and random to the area of 10 urban comprehensive park green space,10 road land affiliated green space,5 residential land affiliated green space and 5 garden green space,the altogether four kinds of urban green space system,field visit investigation,and the application of Rosaceae plant type,frequency and application forms for statistical analysis,and summarizes existing problems,development trend of Dezhou City green land at the same time,The application of Rosaceae in garden was analyzed by AHP,and the development strategy of urban green space system in Dezhou City was put forward.The results of this study provide theoretical reference for the urban green space system application of Rosaceae in Dezhou City.The results are as follows:1.According to literature research and field investigation,there are about 66 common rose plants belonging to 21 genera in Dezhou City.They are Rosa,Prunus,Malus,Armeniaca,Pyrus,Chaenomeles,Sorbaria,Amygdalus,Cerasus,Photinia,Crataegus,Cotoneaster,Pyracantha,Physocarpus,Potentilla,Rhodotypos,Padus,Sorbus,Kerria,Spiraea and Duchesnea.2.On the premise of knowing the species resources of common rosaceae plants in Dezhou City,random field visits were conducted to investigate 30 urban green Spaces in the city.According to statistics and summary,there were 25 species of rosaceae plants belonging to 13 genera in the urban green Spaces of the sample sites.Among them,Prunus Cerasifera Ehrhar f.atropurpurea(Jacq.)Rehd.,Malus micromalus,Rosa chinensis Jacq.,Amygdalus persica L.,Prunus persica ’Atropurpurea’,Amygdalus triloba and Rosa sp.,seven species of Rosaceaceae,have a high frequency of garden application,and their application rates are all above 50%.It can be concluded that these 7 species of Rosaceaceae have a high urban recognition degree and are more suitable for the natural conditions in this region.3.In terms of green space application forms,arbour,such as Malus micromalus,Prunus Cerasifera Ehrhar f.atropurpurea(Jacq.)Rehd.,Cerasus sp.,etc.are usually used at the entrance of green space in urban comprehensive parks and on both sides of garden roads to make regular plant configuration in the form of column planting and tree array;In large areas of green space such as lawns,trees and upright shrubs are mainly distributed in natural clumps,groups and forests.Climbing shrubs such as Rosa sp.more design for hedgerow type landscape form.The application form of the attached green space of road land is mainly lined with street trees,and the trees such as Malus halliana Koehne,Malus micromalus and Prunus Cerasifera Ehrhar f.atropurpurea(Jacq.)Rehd.are mainly used.The road sections with large green belts are divided into regular and natural mixed configuration.In the landscape application of green space attached to residential land and garden green space,rosaceae plants are mostly planted with arbour or regular hedgerows with low shrubs such as Photinia serratifolia(Desfontaines)Kalkman and Rosa chinensis Jacq.near the road,while the rest of the green space is mainly arranged in the form of clumps,groups or forests.4.The AHP analysis of 25 species of Rosaceae in 30 urban green Spaces in Dezhou City was carried out,and the application prospect of 25 species of rosaceae could be preliminarily judged according to the AHP evaluation value.The results showed that Rosa chinensis Jacq.,Rosa sp.,Malus micromalus,Cerasus sp.,Prunus Cerasifera Ehrhar f.atropurpurea(Jacq.)Rehd.,Prunus persica ’Atropurpurea’,Amygdalus triloba,Rosa xanthina Lindl 8 species of Rosaceae plants are 8 points and above,the AHP evaluation can be used as a focus on the application of Dezhou City green space system of plants,and Amygdalus persica L.,Malus halliana Koehne,Rosa rugosa Thunb.,Malus‘American’,Armeniaca vulgaris Lam.,Pyrus spp,Armeniaca mume Sieb.,Malus domestica,Sorbaria sorbifolia(L.)A.Br,Kerria japonica(L.)DC.,Rosa roxburghii Tratt.,Photinia serratifolia(Desfontaines)Kalkman,Chaenomeles japonica(Thunb.)Lindl.,Crataegus pinnatifida Bunge and Malus asiatica are 6 points and above,the AHP evaluation can be in the later on the basis of investigation in Dezhou City area for popularization and application.5.According to the investigation,there are three main problems in the urban green space system of Dezhou City.First,the species of Rosaceae used is relatively single.Secondly,the suitability of some Rosaceae in urban green space is low.Third,it does not fully achieve the application principle of people-oriented.The development trend of urban green space system in Dezhou City was analyzed comprehensively,and the development countermeasures were obtained.First,based on the existing species resources of Rosae in Dezhou City,appropriate introduction and domestication of exotic species were made.Secondly,the botanical characteristics of Rosaceae should be fully considered in plant application.Third,pay attention to the primary and secondary relationship of Rosaceae plant configuration and tree species selection;Fourth,different environments highlight the different characteristics of Rosaceae.According to the development strategy,this study provides a reference design for the application of Rosaceae from two aspects of aesthetics and ecology.