Investigation And Study On True Grasses Planting Landscape Design In Yangtze River Delta Area

True grasses refer to the plant which has the ornamental value,and show the beauty of annual,biennial,or perennial grass,such as Panicoideae,Oryzoideae,Pooideae,Centothecoideae,Arundinoideae,Eragrostidoideae of Gramineae,and some low plants of Bambusoideae,these are important part of ornamental grasses.About the true grasses planting landscape design construction in China,the Yangtze River delta region is a leading edge,there are many varieties of true grasses,and rich in landscape types.In order to further explore the actual landscape effect and application value of true grasses in the Yangtze River delta region,the paper has carried on the investigation and research of the Yangtze River delta region's true grasses planting landscape design,and the main research results are as follows:1.Through the literature review at China and abroad,clarify the concept of true grasses,differentiate between its and the concept of the ornamental grasses,defined and classified the true grasses planting landscape design,including six classes of grasses garden,wetland,flower border,hedge,productive landscape,flower beds and potted.2.The research of true grasses planting landscape design resource in Yangtze River delta region,including the plants under the wild or spontaneous state in Zhejiang region,and the man-made grass plant landscape in Shanghai,Hangzhou and Nanjing,conclude 5 kinds of spontaneous plant landscape types,21 species of wild plants,6 types of man-made landscape,85 kinds of cultivated plants varieties.At the same time,the landscape around the application of comparative analysis,found that using the most plant species in Shanghai,and it has the most complete landscape types,the wetland landscape in Hangzhou is relatively mature,and Nanjing started as early as in grasses garden.3.To do a survey and classification of the Yangtze River delta region of grasses planted,then through the analysises about the volume of space,color emotion,plant material over several classical cases,and summarize grass plants planting landscape design features,including long ornamental period,both individual and group;Short growth cycle and rich landscape sequence change;Good ecological adaptability,into a scene effect fast;Rich plant plasticity,the landscape type;Late prophase low input costs,less maintenance and management;High ecological benefits,meet the aesthetic needs of the pursuit of nature and so on,about six characteristics,and the influencing factors,building principle,choice of plant materials are summarized,finally summarizes the various types of landscape construction technique.4.Overall,the Yangtze River delta region grasses summarizes the current situation of plant landscape,and found the following problems: The first is the application of variety but quality good and bad are intermingled,lack of local varieties;Second,it is goods single seedling varieties,naming is not standard;The third,it has a large landscape application type,but the lack of promotion;The fourth is the design technique is not mature,and lack of late management.Above all,to solve these problems in Yangtze River delta region of the true grasses planting landscape design,for the future development,there are offering following Suggestions: Firstly,to strengthen the introduction and domestication of wild resources,cultivating local varieties;Secondly,to strengthen the selection and promotion of foreign excellent varieties,rich garden plant species;The third,to strengthen true grasses industrialization management,unified commodity seedling named;The fourth is to get rid of disadvantages and easy invasion of true grasses,cultivated varieties of infertility;The fifth is to strengthen the new optimal landscape types of promotion,to try a new way of landscape.Finally,hope to provide theoretical guidance to the future of true grasses planting landscape design construction.