Study On Airborne Pollen Pollution In Beijing[Ⅱ]

When allergenic pollen in the air increases to some extent, it may initiate the pollinosis in susceptible humans. In all the susceptible response, pollinosis is one of the most serious and common in our everyday life. This type of air state is called pollen pollution. The prevalence of pollinosis has increased in recent decades. In order to prevent and treat pollinosis better, it is necessary to carry out the research on airborne allergenic pollen. And it is important to determine the type and concentration of airborne pollen, especially allergenic pollen of highly populated cities. This data proves helpful in the treatment of patients suffering from such diseases and it may contribute to the plant distribution in virescence.The research on the rhythm of allergic pollen is the base of research on airborne pollen pollution. In this study, we located Pierre Cour pollen sampler respectively at the height of 40m in Capital Normal University and of 10m in NO. 101 Middle School. The research was progressed from March 1^st, 2004 to November 29^th, 2004.In the study, the experiment method was developed in order to decrease the loss of pollen, and we also investigated the flowering date of some certain plants in Beijing and made pollen spectrum. All the work ensures the study results scientific and reasonable.In this research, we identified 48 plant families and genera in Capital Normal University and 37 plant families and genera in Yuanmingyuan Park. The rhythm of main airborne pollen was concluded. The analysis was made on the base of comparison with the pollen data of 2002 and 2003 as well as the meteorologist of these two years. There were two peaks from March to November. One is in the period between April and May, the main airborne pollen are arboreal plants pollen such as Pinaceae, Salicaceae and Betulaceae. And the other one is in the period between August and September, the main airborne pollen are such herbaceous plants as Artermisia and Chenopodiaceae. The plant type of these two districts is almost the same at the level of family, but the concentration is somewhat different due to the difference of plant type and quantity at each district as well as the height of the sampler located. Furthermore, the meteorologist such as precipitation, temperature, relative humidity and air pressure also have effect on the airborne pollenconcentration.At last, some problems about the study on airborne allergenic pollen and related resolvents were brought forward in the paper. Although there are many problems in the study on airborne allergic pollen unsolved, the prospects of this study is very broad.