Study on Ecosystem Service Function of Urban Forest in Beijing
Ecosystem service function of urban forest in Beijing such as negative air ion increase,pollutants absorption,noise abatement,dust holding was measured by outdoor survey and laboratory experiment.The results showed that： ①The existence of landscape plants can significantly increase the concentration of negative air ion.Seasonable change of negative air ion concentration was evidently.Concentration of negative air ion took on a form of single-peak curve with the altitude increase,and was positive related to temperature and relative humidity.②The absorption capacity of trees was significantly different because of different species.The total absorption capacity order of different trees was basically same just as follows： S〉Cl〉Zn〉Cu〉Cr〉Pb〉As〉Hg〉Cd.③The order of dust holding capacity（the quantity of dust holding of dry weight） was as follows： Berberis thunbergii cv.Atropurpurea〉Sorphora japonica〉Euonymus fortunei（Turcz.） Hand.-Mazz.〉Buxus microphylla〉Euonymus alatus〉Pinus tabulaeformis 〉Biota orientalis〉Populus canadensis Moench,Pyrus pyrifolia〉P.persica〉P.armeniaca〉Malus pumila Mill.cerasum and Cerasus.④The most significant noise abatement capacity in the Third Ring Road,the Fourth Ring Road and the Fifth Ring Road was at 10 meters,150 meters and 50 meters place of the forest belt where the noise reduction rate was 8.39 percent,5.81 percent and 6.91 percent.Regression relation of cube function between noise abatement capability and distance of forest belt in each ring road was significant.
urban forestecosystem service functionnegative air ionpollutants absorptionnoise abatementdust holding
国家科技期刊平台
NSTL
万方数据
维普
