Research On The Plant Community PM2.5Concentration And Plant Landscape In Four General Hospitals Of Hangzhou

In view of the problems of the less research in plant community ecology efficiency and plantlandscape in general hospital, this study base on the investigate of the10general hospitals inHangzhou determined the117hospital of The people’s liberation army,Zhejiang hospital, Sir Run RunShaw Hospital affiliated to the Zhejiang University School of Medicine and people’s hospital ofZhejiang province, to study the plant community species diversity,at the same time to measure its24plant communities of PM2.5and PM10, measure the temperature and humidity of the air quality index, toquestionnaire the plant landscape of the general hospital and to evaluation its plant landscape by themethod of AHP from the aspects of landscape, ecology and recreation level, At last, it discusses theoptimization of the plant community landscape. Results are as follows:10hospital a total of73families,132genera,186species of plants, Woody plants applicationproportion is the largest, followed by herb and liana, the application of bamboo and Aquatic plants areless, the main view flowers, foliage, view fruit plants there were53species,21species,and6species.The4general hospitals24plant communities with a total of52families,75genera,101speciesof plants, it can divided into five types: Evergreen and deciduous mixed type holding12samples ofplant community; Evergreen and deciduous conifer mixed type holding7samples; Evergreenbroad-leaved type holding2samples; Deciduous mixed needle type holding1samples;Deciduousconiferous type holding1samples. Plant community structure, average density of tree layer species was908per.hm-2, average density of shrub layer species was3763per.hm-2. The average species richness oftree layer, shrub layer and grass layer was4.7083; averages of Shannon-Weiner index was1.4634;averages of Pielou index was0.9194; averages of Simpson ’s index was0.4955; averages of Gleasonindex was0.7858. The diversity index of4hospitals roughly: Zhejiang hospital>117hospital of Thepeople’s liberation army> Run run shaw hospital> The people’s hospital of Zhejiang province.PM2.5of24plant communities was monitored records from2012,12thto2013,12th.The results showthat: on the whole, PM2.5of the general hospital in Hangzhou was relatively low, close to the Nationalsecondary standard, the environmental quality is better. The change trend of the four seasons of PM2.5concentration from low to high was spring <autumn <winter <summer‘, lowest in summer, the airenvironmental quality was best, the highest in winter, environmental quality was the worst. Daily variation regularity of PM2.5was9:00-10:00a.m. at the peak,12:00-13:00reached the lowest, andrising around15:00PM, arranged in "Bimodal ChanGu". Different plant community structure of PM2.5concentrations is different, plant community level was significantly lower than the space, arbors-shrub-grass collocation of the complex layers of plant community sample was slightly lower than samplearbors-lawns and arbors–shrubs, there is no obvious difference between the samples of arbors-shrubsand arbors–grass. The concentration of PM2.5is linear negative correlation with temperature, linearpositive correlation with humidity.The Questionnaire survey shows：The outdoor space of General Hospital is mainly used by patients,medical staff and visitors, mostly in the age of20-50years old; Relaxation is the activity that they mostwant to. Recreational space and parking space is that they most want to increase. Green planting shouldnot only have a tree and low shrubs and ground cover, but also height is less than20m. They hope thehospital outdoor space can create a colorful landscape effect.Use the method of AHP to evaluate plant landscape of24plant communities. The results showed:Comprehensive evaluation index for Ⅰ level had eight samples, Ⅱ level had nine samples, Ⅲ level hadseven samples, no Ⅳ sample.11samples (6levels Ⅰ,2Ⅱ and3Ⅲ level) was measured and theanalysis of plant landscape, Found that the plant community，s landscape, ecological and recreationlevels ofⅠlevel samples do better; the plant community，s landscape and ecological levels ofⅡusuallygood, but the plant landscape recreation can be relatively poor; the plant community landscape visualquality of Ⅲ level samples is poorer, ecological level low score, recreation is also poor.Aiming at the existing problem of general hospital in Hangzhou, the way to increase characteristicplants in the overall were put forward, improve the quality of hospital visual ornamental and ecologicalenvironment;Set the feature blocks, actively build ecological health plant community landscape; Theintroduction of horticultural therapy, increase the humanization, actively build illicit close, interactionand recovery space.