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• 基金项目：

• 吴诚华
• 中国科学院微生物研究所

• 李钟庆
• 中国科学院微生物研究所

• 齐祖同
• 中国科学院微生物研究所

• 徐浩
• 中国科学院微生物研究所

• 摘要：比较了1957年和1981年两次对气挟真菌的调查结果,证明北京上空气挟真菌的密度由1957年至1981年增加到原来的350%,这反映出空气挟尘量的急剧增加。经鉴定得知:优势菌种有四种即Cladosporium、Aspergillus、Alternaria和Penicillium,从全年的累计菌的群体比例上看,夏季Aspergillus密度增高。从已鉴定的真菌的属的数目上看,冬日菌种最多,这显然是因为植被枯萎、风砂严重所致,秋季是最清洁的季节,这和植被覆盖好、风砂少有关。

• Abstract：Air-borne microfungi population over Beijing in 1956-1967 and 1979-1981 were analyzed and compared. The population density has increased 350% from 1967 to 1981. This is probably due to the reason that air dusting is getting heavier in the past 24 years. The dominant species of the air-borne fungi are Cladosporiam, Alternaria, Aspergillus and Penicillium. In summer time the density of the Aspergillus population increases considerably, while the largest number of the identified genera appears in winter. This is probably due to lack of the plant coverage at that time. On the other hand, autumn is the cleanest season in a year because of its better plant covering, and less air-borne dust.

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