PRELIMINARY STUDIES ON AIR-BORNE SPORES AND POLLENS IN NORTHERN SUBURB OF BEIJING

摘要

Air borne spores and pollens were collected by using Durham Pollen Sampler from 38 metre building top platform in northern suburb of Beijing and observations were carried out accordingly. Distributed mainly in March to October in a year, both the amount and variations of pollens are affected by air temperature and precipitation in addition to that of florescence. The maximum pollen species are found in May, and the maximum pollen amount is found in early June, and then in September. Pollens of herbs predominate, mostly distributing in May to September. Xylophytes have smaller amount of pollens which are found mostly in March to June. The amount of air borne plant pollen and bacterial spores is much higher in hot sunny days than in the cloudy/rainy days. The alternation of hot sunny days with cloudy/rainy days is most favourable for bacterial spores dispersion.