关键词: 超微结构, 超微结构

Abstract: Having made considerable progress in recent years, the urban forestry construction is gradually transforming its concerns from focusing on function and aesthetics to eco-health function. Due to the lack of researches on the eco-health function of most-used plants species, in this study, five typical urban green species (Populus tomentosa, Salix matsudana, Pinus tabulaeformis, Platycladus orientalis, Poa Annua and arbor -shrub-grass green space) in three representative urban green spaces were monitored for the concentration of air anion, the air temperature and relative humidity, the concentration of carbon dioxide (CO2), and the noise level at different locations of green spaces in different seasons. Some conclusions can be seen from the results: (1) compared to the five single-specie arbor groves, arbor -shrub-grass green space has better eco-health function. Using the concentration of CO2 as an example, the highest concentration of air anion was found in a arbor -shrub-grass green space(435×10-6) ;(2) deciduous trees has better eco-health function in foliaceous period, while showed poor eco-health function in foliage-falling period. Using the concentration of air anion as an example, the highest number was found in deciduous tree groves(Salix matsudana) 1500 cm-3; (3) in terms of maintaining the eco-health function, evergreen conifer groves, represented by oriental arborvitae (Platycladus orientalis), showed a more steady result. The difference of the air anion concentrations is 154cm-3 ,which is half of the difference of deciduous specie(Poplus tomentosa)