The Application And Adaptability Evaluation Of Notrh America Color Plants In Beijing

With the development of economy, the progress of the society and the living standardenhancement, the requirement for landscape greening is becoming more diversified. Therefore,color plants have gradually become an important part of garden plants. As an international bigcity, Beijing has introduced some color species from overseas. However, the color plants usedin Beijing is of low variety. The structure and distribution of the species is not balanced andthe maintenance of them is not satisfied. Especially color trees introduced from North America.Although a lot of them have been introduced these years, they have not been widely used andpromoted. Therefore, it exists great chance and prospect to develop in this area.This thesis mainly researches color plant resources in Beijing. By investigation andanalysis of domestic color plants and those introduced from North America, it summarizesthe species and arrangement patterns of them. The purpose of this thesis is to afford referancefor protection, development and application of color plants. The excellent domestic colorplants in Beijing contains color arbor: Ginkgo biloba,Acer truncatum Bunge, Cotinuscoggygria, Koelreuteria paniculata, Diospyros kaki, Ailanthus altissima and color shrubs:Berberis thunbergii, Cornus alba, Kerria japonica, Ligustrum×vicaryi, Prunus ceraifera,Rhus typhina, Armeniaca mume 'Beauty mei'. The excellent color plants introduced fromNorth America contains color arbor: Quercus rubra, Aesculus carnea'Briotil', Acer rubrum,Amelanchier×grandiflora and color shrubs: Prunus virginiana var. schubert, Cotinuscoggygria'Purpureus', Acer negundo var. variegatum, Sambucus racemosa Plumosa Aurea,Viburnum nudum.By the comparsion of the local color plants and color plants from NorthAmerica, with the practical case analysis of color plants in Beijing South Moat and Guang anmen Bridge Area, this thesis presents the advantages and disadvantages of native color plantsand introduced species. The results is：Despite the rich species of domestic color plants, thereexists more developing opportunities for North American color plants because of its richer species, the gorgeous and diversified colors of them. However, their growth in Beijing is farfrom satisfying compared from it in North America.The study thoroughly observes the growth condition of six North America color plantsplanted in Beijing. They are Acer×freemani, Acer platanoides L., Quercus rubra, NorthAmerican Begonia: Malus 'Indian Magic' Malus'Donald 'Wyman', Malus'Adams',Malus'Dolgo' Sambucus canadensis'Aurea', Robinia pseudoacacia L. It reseaches ontheir phenological characteristics, growth rhythm and the adaptability to temperature, light andsoil condition and summarizes the Ecological Adaptability and planting requirements of thesecolor plants. In conclusion,the above mentioned6tree species remain good adaptability forgrowing in Beijing area,which can be introduced to nurse and use in large amount.There exists great potential for introducing North America color plants into Beijing.Color plants from North America have brighter color, longer color period and betterornamental view than domestic ones. However, their adaptability and growing condition is farless than the local ones. Therefore, it is required to keep a balance between domestic colorplants and introduced color plants to beautify the urban environment.