Study On The Ecological Healthcare Function Of Bamboo

With the rapid development of urbanization,urban areas have had an irreversible tendency bringing a series of serious consequences in the last decades.At the same time,the public has expressed a strong desire to improve their living environment.Plants can not only protects and improves the environment,but also promotes the physical and mental health of mankind through its ecological healthcare functions.Because of the characteristics of fast growth,high yield and strong adaptability,bamboos have been widely used in the urban green space in recent years.Aiming at two of ecological healthcare function,this study made evaluation by means of experiments about temperature,relative humidity and negative air ion measurement.The main experimental results are as follows:?1?There exsited significant differences in the temperature and relative humidity between bamboos and square.In summer,compared with square,the bamboos can decrease temperature by 1.0³.5?,and increase the relative humidity with 9.1¹4.9%.In autumn,compared with square,the bamboos can decrease temperature by 1.0².8?,and increase the relative humidity with 8.5¹5%.Combined with the experimental data of two seasons,the temperature decrease of different bamboos was in order of Phyllostachys aureosulcata f.vittata> Phyllostachys prominens> Phyllostachys vivax f.aureocaulis\Phyllostachys glauca> Phyllostachys heterocycla> Sinobambusa tootsik f.luteolo-albo-striata> Pseudosasa japonica var.tsutsumiana.The relative humidity increase of different bamboos was in order of Phyllostachys aureosulcata f.vittata> Phyllostachys prominens> Phyllostachys heterocycla> Phyllostachys glauca> Phyllostachys vivax f.aureocaulis> Sinobambusa tootsik f.luteolo-albo-striata> Pseudosasa japonica var.tsutsumiana.?2?The bamboos are able to reduce the diurnal mean discomfort index?DI?in some degree.In summer,compared with square,the bamboos can decrease DI by 0.1¹.2.Phyllostachys vivax f.aureocaulis and Phyllostachys aureosulcata f.vittata are the first level of body comfort,Phyllostachys prominens and Phyllostachys glauca are the second,and Phyllostachys heterocycla,Sinobambusa tootsik f.luteolo-albo-striata and Pseudosasa japonica var.tsutsumiana are the third.?3?There exsited a little differences in the temperature,relative humidity and Discomfort Index between inside and outside of different bamboos.Combined with the experimental data of two seasons,and compared with outside of bamboos,inside can decrease temperature by 0.1⁰.5?,DI by 0.4⁰.7,and increase the relative humidity with 1.6².6%.?4?There exsited significant differences in the negative air ion concentration between bamboos and square.Compared with square,the bamboos can increase the negative air ion concentration by 360⁶26 ions · cm^-3,and the negative air ion concentration of different bamboos was in order of Phyllostachys prominens> Phyllostachys glauca> Phyllostachys aureosulcata f.vittata> Phyllostachys vivax f.aureocaulis> Phyllostachys heterocycla> Sinobambusa tootsik f.luteolo-albo-striata> Pseudosasa japonica var.tsutsumiana.The negative air ion concentration of different seasons was in order of summer> autumn> spring> winter.?5?There exsited significant differences in the CI between bamboos and square.Compared with square,the bamboos can increase the CI by 0.56⁰.90.Phyllostachys prominens is the first level of improving the air,Phyllostachys aureosulcata f.vittata,Phyllostachys glauca and Phyllostachys vivax f.aureocaulis are the second,Phyllostachys heterocycla is the third,and Pseudosasa japonica var.tsutsumiana and Sinobambusa tootsik f.luteolo-albo-striata are the last.The CI of different seasons was in order of summer> autumn> spring> winter.?6?There exsited a little differences in the negative air ion concentration and CI between inside and outside of different bamboos.Compared with outside of bamboos,inside can increase negative air ion by 33⁶0 ions · cm^-3,and CI with 0.08⁰.19.?7?Correlation analysis between microclimate factors and the indices of the bamboos' structural characteristics?LAI,Gendcover,VisSky,and Density?show that structural characteristics play important regulatory role in microclimate and thermal environment.Correlation analysis between microclimate factors,indices of the bamboos' structural characteristics?LAI,gendcover,visSky,and density?and the negative air ion concentration show that microclimate factors and structural characteristics play important regulatory role of negative air ion concentration in bamboos.Therefore,we should select more kinds of bamboo with high LAI,gendcover and density.