Objective To investigate the relationship between types, content, regularity of growth and decline of airborne pollen and distribution characteristics and its influencing factor in Taiyuan Center. Methods Daily airborne pollen monitoring was performed by Gravitational Method using Ye'S Sampler in Taiyuan from July 2011 to June 2012, and compared the recent survey result with the result of 1977-1978. The samples were separately placed on the well-ventilated building roofs of the 4th, 7th and 17th floors. Results 16999 grains of pollen were collected within the period mentioned above in total. Peak value of mensal pollen count was seen in August to September, which was followed by in March to May. Twelve kinds of new airborne pollens were collected in our recent survey. The four kinds of common and abundant pollens accounted for as much as 74.12% in 2011-2012. Artemisia pollen was the most abundant airborne pollens in mount(39.47%). The recent percentage of Populus and Salix pollen decreased obviously, compared to the data of 35years before, resulting in peak value of mensal pollen count was seen in summer-autumn instead of spring in 2011-2012. The genera of airborne pollens of 4th floored buildings and 7th floored buildings were approximately the same, while of 17th floored buildings were reduced. Conclusions The peak of airborne pollen in spring appeared earlier and longer than it appeared 35 years ago and he annual percentage content of pollen of Populus, Salix was significantly lower. The content and types of pollen on 17 floors(51 meters) significantly reduced compared with Layer 4 and Layer 7.
Airborne pollenPollen countSeasonal distribution of airborne pollenDifferent floorsTaiyuan
NETL
NSTL
万方数据
维普
