Research On Evaluation And Effect Of Plants Landscape Of General Hospitals In Hangzhou

This paper investigated and analyzed the species composition, disposition form, seasonal structureand forest structure through literature study and on-the spot investigation of13general hospitals inHangzhou.We measured the concentration of positive and negative ion in the air, and otherenvironmental factors such as humiture, concentration of inhalational granules in typical soil chosedfrom areas with different functions in three hospitals. Comprehensive assessment for the landscapequality has also been made according to scenic forest landscape function features.Then we give somesuggestions about plants landscape for general hospitals based on our research and analysis.Specificresearch achievements are as follows:(1)Among the13general hospitals in Hangzhou, there is1section1division1kind of thembelongs to Ferns, there are69sections131division184kinds belong to Spermatophyte,8sections13divisions18kinds belong to Gymnosperm,61sections118divisions166kinds belong to Angiosperm.According to the plant view characters,the statistics on general hospitals in hangzhou shows thenumbers of flowers, trees, fruit are61,9,13.The usual community types are shrub,vine, shrubsherb,arbor herb. The results demonstrate the evergreen plants are in a dominant position in terms of theirquality and kind, which form different scenic forest landscape arranged with deciduous and needleleaved plants.(2)According to the research on the change of aero-anion concentration in the green garden in oneday of general hospitals, we found a bimodal curve during the measured period, and the summit time is11:00and16:00.We monitored the aero-anion concentration in different spaces of these three hospitalsall the year around.The results indicate summer is highest, the other three seasons are clearly lowerthan summer. The aero-anion concentration changes in decreased order:summer>spring>autumn>winter. The concentration in different plant communities from high to low:structure of arbor-bush-grass, structure of arbor-grass, structure of shrub-grass, lawn, contrast. Theconcentration and CI value in structure of arbor-bush-grass is clearly higher than others. A correlationanalysis shows a significant negative correlation between aero-anion concentration andtemperature,also a negative correlation between aero-anion concentration and inhalational granulesconcentration.The aero-anion concentration rises while the temperature and humidity goes up in thesome area.(3) Of the comprehensive evaluation indexes from27community samples,3samples achieved Ⅰgrade, which accounts for11.1%.One of three is in green garden space,while the other two are in greenrode space;12samples achieved Ⅱgrade accounting for44.4%.11samples achieved Ⅲgrade, sharing40.7%from the all. One community achieved Ⅳgrade.Compared to natural landscape and greengarden, there is obvious gap for general hospitals to fill.. (4) Considering the present use of plant in general hospitals of Hangzhou, we put forward a fewconstructive advices in terms of health protection plant community, the promotion of gardening therapyand the disposition form of areas with different functions.